JP6175376B2 - Rotary tillage device - Google Patents

Rotary tillage device Download PDF

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JP6175376B2
JP6175376B2 JP2014015646A JP2014015646A JP6175376B2 JP 6175376 B2 JP6175376 B2 JP 6175376B2 JP 2014015646 A JP2014015646 A JP 2014015646A JP 2014015646 A JP2014015646 A JP 2014015646A JP 6175376 B2 JP6175376 B2 JP 6175376B2
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claw
mounting
attachment
claw mounting
attached
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JP2015139427A (en
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和正 藤田
和正 藤田
岡村　誠一
誠一 岡村
健 木ノ下
健 木ノ下
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Kubota Corp
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Description

本発明は、ロータリ耕耘装置に関するものである。   The present invention relates to a rotary tiller.

ロータリ耕耘装置として特許文献１に開示されたものがある。
このロータリ耕耘装置は、トラクタの後部に装着される機枠に、左右軸回りに回転自在に支持された爪軸を備えている。この爪軸には、爪取付フランジが爪軸軸心方向に間隔をおいて多数設けられている。各爪取付フランジには耕耘爪の基部が一対の爪取付ボルトによって取付固定されている。 There is one disclosed in Patent Document 1 as a rotary tiller.
This rotary tiller is provided with a claw shaft supported on a machine frame attached to the rear portion of the tractor so as to be rotatable about a left-right axis. A number of claw mounting flanges are provided on the claw shaft at intervals in the claw shaft axis direction. The base of the tilling claw is fixedly attached to each claw mounting flange by a pair of claw mounting bolts.

前記耕耘爪の基部は爪取付フランジの側面に重ね合わされ、この耕耘爪の基部及び爪取付フランジを前記一対の爪取付ボルトが貫通し、各爪取付ボルトに爪取付ナットを螺合して締め付けることによって、耕耘爪が爪取付フランジに取付固定されている。
前記ロータリ耕耘装置にあっては、爪軸を軸心回りに回転駆動することにより、該爪軸と共に爪取付フランジ及び耕耘爪が一体回転し、回転する耕耘爪によって土壌を耕耘する。 The base of the tilling claw is superimposed on the side surface of the claw mounting flange, the pair of claw mounting bolts pass through the base of the tilling claw and the claw mounting flange, and the claw mounting nut is screwed into each nail mounting bolt and tightened. Thus, the tilling claw is fixedly attached to the claw mounting flange.
In the rotary tiller, when the nail shaft is driven to rotate about the axis, the nail mounting flange and the tilling nail rotate together with the nail shaft, and the soil is cultivated by the rotating tillage nail.

一方、爪取付フランジに取り付けられる耕耘爪として、Ｌ型爪と、このＬ型爪とは種類の異なるなた爪とが知られている。   On the other hand, as a tilling nail attached to the nail attachment flange, an L-type nail and a nail nail different from the L-type nail are known.

特開平２００８−２２７１６号公報Japanese Patent Laid-Open No. 2008-22716

前記Ｌ型爪となた爪とは、爪長さや、爪取付ボルトを挿通する爪取付ボルト挿通孔の穴ピッチが異なっていると共に、爪取付フランジに取り付けられる本数も異なる。
したがって、従来のロータリ耕耘装置にあっては、１台のロータリ耕耘装置について１種類の耕耘爪しか取り付けられないのが現状である。
一方、同じロータリ耕耘装置で、Ｌ型爪仕様と、なた爪仕様とに仕様変更できれば至便である。また、土を細かくしたい場合にはＬ型爪が適しており、土の反転性が要求される場合にはなた爪が適しているが、１台のロータリ耕耘装置で作業に応じた耕耘爪を選択的にセッティングすることができれば、市場で高い評価が得られる。 The claw that is an L-shaped claw is different from the claw length and the hole pitch of the claw mounting bolt insertion hole through which the claw mounting bolt is inserted, and the number of the claw mounting flanges that are attached to the claw mounting flange is also different.
Therefore, in the conventional rotary tiller, the present condition is that only one kind of tillage claw can be attached to one rotary tiller.
On the other hand, it is convenient if the specification can be changed between the L-type claw specification and the claw specification with the same rotary tiller. In addition, L-shaped claws are suitable when it is desired to make the soil finer, and nails are suitable when reversibility of the soil is required. If it can be set selectively, it will be highly evaluated in the market.

そこで、本発明は、前記問題点に鑑み、異なる種類の耕耘爪を選択的に取り付けることのできるロータリ耕耘装置を提供することを課題とする。   Then, in view of the said problem, this invention makes it a subject to provide the rotary tilling apparatus which can selectively attach a different kind of tilling nail | claw.

前記技術的課題を解決するために本発明が講じた技術的手段は、以下に示す点を特徴とする。
第１に、軸心回りに回転駆動可能な爪軸の外周に、爪取付フランジを爪軸軸心方向に複数設け、各爪取付フランジに、第１耕耘爪を取り付けるための第１爪取付部を爪取付フランジの周方向に複数設けると共に、この第１爪取付部の爪取付フランジ内周側において、前記第１耕耘爪とは種類の異なる第２耕耘爪を取り付けるための第２爪取付部を爪取付フランジの周方向に複数設けており、前記第１耕耘爪と前記第２耕耘爪は爪取付ボルトを介して爪取付フランジに選択的に締結固定され、第１爪取付部と第２爪取付部は、前記爪取付ボルトを挿通する爪取付ボルト挿通孔からなり、１枚の爪取付フランジに設けられた第１爪取付部の爪取付ボルト挿通孔は、爪軸の軸心を中心とする第１の円周上に形成され、前記１枚の爪取付フランジに設けられた第２爪取付部の爪取付ボルト挿通孔は、爪軸の軸心を中心とし且つ前記第１の円周よりも径内側に位置する第２の円周上と、爪軸の軸心を中心とし且つ前記第２の円周よりも径内側に位置する第３の円周上に形成され、前記第２耕耘爪は、爪軸回転方向の一方側が前記第２の円周上に位置する爪取付ボルト挿通孔に取り付け可能であり、爪軸回転方向の他方側が前記第３の円周上に位置する爪取付ボルト挿通孔に取り付け可能であることを特徴とする。 The technical means taken by the present invention to solve the technical problems are characterized by the following points.
First , a plurality of claw mounting flanges are provided on the outer periphery of the claw shaft that can be driven to rotate about the shaft center in the claw shaft axis direction, and a first claw mounting portion for mounting the first tillage claw on each claw mounting flange Are provided in the circumferential direction of the claw mounting flange, and a second claw mounting portion for mounting a second tilling claw of a different type from the first cultivating claw on the inner peripheral side of the claw mounting flange of the first claw mounting portion. Are provided in the circumferential direction of the claw mounting flange, and the first tilling claw and the second tilling claw are selectively fastened and fixed to the claw mounting flange via a claw mounting bolt, and the first claw mounting portion and the second claw mounting flange The claw mounting portion includes a claw mounting bolt insertion hole through which the claw mounting bolt is inserted. The claw mounting bolt insertion hole of the first claw mounting portion provided on one claw mounting flange is centered on the axis of the claw shaft. The first claw mounting flange is formed on the first circumference. The claw mounting bolt insertion hole of the second claw mounting portion is formed on a second circumference centered on the axis of the claw shaft and on the inner side of the first circumference, and on the axis of the claw shaft. And the second tillage claw is positioned on one side in the claw axis rotation direction on the second circumference. The claw attachment bolt insertion hole can be attached, and the other side in the claw shaft rotation direction can be attached to the claw attachment bolt insertion hole located on the third circumference .

第２に、軸心回りに回転駆動可能な爪軸の外周に、爪取付フランジを爪軸軸心方向に複数設け、各爪取付フランジに、第１耕耘爪を取り付けるための第１爪取付部を爪取付フランジの周方向に複数設けると共に、この第１爪取付部の爪取付フランジ内周側において、前記第１耕耘爪とは種類の異なる第２耕耘爪を取り付けるための第２爪取付部を爪取付フランジの周方向に複数設けており、前記第１耕耘爪と前記第２耕耘爪は爪取付ボルトを介して爪取付フランジに選択的に締結固定され、第１爪取付部と第２爪取付部は、それぞれ前記爪取付ボルトを挿通する一対の爪取付ボルト挿通孔から構成されており、前記第２耕耘爪は、前記第２爪取付部を構成する一対の爪取付ボルト挿通孔のうちの一方の爪取付ボルト挿通孔に取り付け可能な一方取付部と、他方の爪取付ボルト挿通孔に取り付け可能な他方取付部とを有し、且つ、前記第２爪取付部に取り付けた状態において前記一方取付部と前記他方取付部とを結ぶ直線の中点に直交する直線が前記爪取付フランジの中心から外れることを特徴とする。
第３に、１枚の前記爪取付フランジに取り付けられる前記第１耕耘爪の数と前記第２耕耘爪の数が異なることを特徴とする。 Second, a plurality of claw mounting flanges are provided on the outer periphery of the claw shaft that can be driven to rotate about the shaft center in the claw shaft axis direction, and a first claw mounting portion for mounting the first tilling claw on each claw mounting flange Are provided in the circumferential direction of the claw mounting flange, and a second claw mounting portion for mounting a second tilling claw of a different type from the first cultivating claw on the inner peripheral side of the claw mounting flange of the first claw mounting portion. Are provided in the circumferential direction of the claw mounting flange, and the first tilling claw and the second tilling claw are selectively fastened and fixed to the claw mounting flange via a claw mounting bolt, and the first claw mounting portion and the second claw mounting flange Each of the claw mounting portions includes a pair of claw mounting bolt insertion holes through which the claw mounting bolts are inserted, and the second tilling claw includes a pair of claw mounting bolt insertion holes constituting the second claw mounting portion. One that can be attached to one of the claw mounting bolt insertion holes A mounting portion and a second mounting portion attachable to the other claw mounting bolt insertion hole, and a straight line connecting the one mounting portion and the other mounting portion in a state of being mounted to the second claw mounting portion. A straight line perpendicular to the midpoint is deviated from the center of the claw mounting flange .
Thirdly, the number of the first tilling claws attached to one piece of the claw mounting flange is different from the number of the second tilling claws .

第４に、前記複数の第２爪取付部は、前記爪取付フランジの周方向に同一ピッチで配置され、前記複数の第１爪取付部は、前記爪取付フランジの周方向に複数の異なるピッチで配置されていることを特徴とする。
第５に、前記第１耕耘爪は、前記爪取付フランジの一方の側面に取り付けられ、前記第２耕耘爪は、前記爪取付フランジの一方の側面及び他方の側面にそれぞれ取り付けられていることを特徴とする。
第６に、複数の前記爪取付フランジは、前記爪軸軸心方向の一方から他方にいくにつれて、順次、爪軸回転方向に位相をずらして配設されており、爪軸軸心方向に離間した一対の爪取付フランジ間に草巻付き防止部材が配置され、前記草巻付き防止部材は、前記爪取付フランジの使われていない爪取付ボルト挿通孔を挿通することで、前記一対の爪取付フランジ間に且つ前記爪軸の周囲に螺旋状に配置されることを特徴とする。 Fourth, the plurality of second claw attachment portions are arranged at the same pitch in the circumferential direction of the claw attachment flange, and the plurality of first claw attachment portions are arranged at a plurality of different pitches in the circumferential direction of the claw attachment flange. It is characterized by being arranged by .
Fifth, the first tillage claw is attached to one side of the claw attachment flange, and the second tillage claw is attached to one side and the other side of the claw attachment flange, respectively. Features.
Sixth, the plurality of claw mounting flanges are sequentially arranged with a phase shifted in the claw axis rotation direction from one side to the other in the claw axis direction, and separated in the claw axis direction. A cigarette prevention member is disposed between the pair of claw attachment flanges, and the cigarette prevention member is inserted into a claw attachment bolt insertion hole that is not used in the claw attachment flange. It is arranged between the flanges and around the claw shaft in a spiral shape.

本発明によれば、以下の効果を奏する。
本発明によれば、１台のロータリ耕耘装置の爪取付フランジに、異なる種類の耕耘爪を選択的に取り付けることができ、１台のロータリ耕耘装置を作業に応じた仕様に変更することができる。また、第１爪取付部の爪取付フランジ内周側に第２爪取付部を設けたので、第１耕耘爪の取付位置と、第２耕耘爪の取付位置とを容易に識別することができ、耕耘爪の付け間違いを防止することができる。 The present invention has the following effects.
According to the present invention , different types of tilling claws can be selectively attached to the pawl mounting flange of one rotary tiller, and one rotary tiller can be changed to specifications according to work. . Moreover, since the 2nd nail attachment part was provided in the nail attachment flange inner peripheral side of the 1st nail attachment part, the attachment position of the 1st tillage nail and the attachment position of the 2nd tillage nail can be identified easily. Can prevent mistakes in plowing nails.

また、第１取付部と第２取付部のうち、使われていない爪取付部の爪取付ボルト挿通孔を利用して、爪取付フランジに対して草巻付き防止部材を通過させることができ、爪取付フランジに草巻付き防止部材の挿通用の孔を別途形成する必要がなく、コストアップを抑えることができる。 In addition, using the claw mounting bolt insertion hole of the claw mounting portion that is not used among the first mounting portion and the second mounting portion, it is possible to pass the grass winding prevention member to the claw mounting flange, It is not necessary to separately form a hole for insertion of the cigarette prevention member in the claw mounting flange, and the cost increase can be suppressed.

ロータリ耕耘装置を三点リンク機構によってトラクタ車体の後部に装着した状態を示す側面図である。It is a side view which shows the state which mounted | wore the rotary cultivator with the rear part of the tractor vehicle body by the three-point link mechanism. ロータリ耕耘装置の背面一部展開断面図である。It is a back surface partially expanded sectional view of a rotary tillage apparatus. 爪取付フランジにＬ型爪を取り付けた場合の側面図であり、中間の爪取付フランジにＬ型爪を取り付けた状態を例として示している。It is a side view at the time of attaching an L type nail to a nail attachment flange, and shows the state where an L type nail was attached to an intermediate nail attachment flange. （ａ）はＬ型爪を取り付けた場合のロータリ耕耘部の背面拡大断面図、（ｂ）は草巻付き防止部材の端部の固定手段の変形例を示す背面一部断面図である。(A) is a back surface expanded sectional view of the rotary tillage part at the time of attaching an L-type nail | claw, (b) is a back surface partial sectional view which shows the modification of the fixing means of the edge part of a cigarette prevention member. 爪取付フランジになた爪を取り付けた場合の側面図であり、右端の爪取付フランジになた爪を取り付けた状態を例として示している。It is a side view at the time of attaching a nail | claw to the claw attachment flange, and has shown the state which attached the claw to the claw attachment flange of the right end as an example. なた爪を取り付けた場合のロータリ耕耘部の背面図である。It is a rear view of a rotary tillage part at the time of attaching a nail | claw.

以下、本発明の実施の形態を図面を参照して説明する。
図１、２において、１はサイドドライブ式のロータリ耕耘装置を示している。
このロータリ耕耘装置１はトラクタ車体２の後部に３点リンク機構３等の連結機構を介して昇降可能に連結される。
図１及び図２に示すように、前記ロータリ耕耘装置１は、左右方向中央部に位置するギヤケース４と、このギヤケース４から左右両側方に突出したサポートアーム５Ｌ，５Ｒと、一方（左側）のサポートアーム５Ｌの外端に取り付けられた伝動ケース６と、他方（右側）のサポートアーム５Ｒに取り付けられたサイドフレーム７とを有するロータリ機枠８を備えている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2, reference numeral 1 denotes a side drive type rotary tiller.
The rotary tiller 1 is connected to the rear portion of the tractor vehicle body 2 through a connecting mechanism such as a three-point link mechanism 3 so as to be lifted and lowered.
As shown in FIGS. 1 and 2, the rotary tiller 1 includes a gear case 4 located at the center in the left-right direction, support arms 5L and 5R protruding from the gear case 4 to the left and right sides, and one (left side). A rotary machine casing 8 having a transmission case 6 attached to the outer end of the support arm 5L and a side frame 7 attached to the other (right) support arm 5R is provided.

前記伝動ケース６とサイドフレーム７の下部には、回転軸９がそれぞれ左右軸回りに回転自在に設けられている。これら回転軸９間には左右方向の軸心を有する爪軸１０が設けられ、該爪軸１０は各回転軸９に連結されている。
ロータリ機枠８には左右連結ブラケット１１及びマスト１２が設けられ、左右連結ブラケット１１には３点リンク機構３の左右一対のロアリンク１３の後端が連結され、マスト
１２には３点リンク機構３のトップリンク１４が連結されている。 At the lower portions of the transmission case 6 and the side frame 7, rotary shafts 9 are provided so as to be rotatable around the left and right axes, respectively. A claw shaft 10 having a horizontal axis is provided between the rotation shafts 9, and the claw shaft 10 is connected to each rotation shaft 9.
The rotary machine frame 8 is provided with left and right connecting brackets 11 and a mast 12. The left and right connecting brackets 11 are connected to the rear ends of a pair of left and right lower links 13 of the three-point link mechanism 3, and the mast 12 has a three-point link mechanism. 3 top links 14 are connected.

ギヤケース４にはＰＩＣ軸１５が設けられ、このＰＩＣ軸１５にはトラクタ車体２のＰＴＯ軸１６からジョイント１７を介して回転動力が伝達される。このＰＩＣ軸１５に伝達された動力は、ギヤケース４内のギヤ伝動機構１８、左サポートアーム５Ｌ内の伝動軸１９及び伝動ケース６内のチェーン伝動機構２０を介して左側の回転軸９に伝達される。この左側の回転軸９に伝達される動力によって爪軸１０が軸心回りに回転駆動される。   The gear case 4 is provided with a PIC shaft 15, and rotational power is transmitted to the PIC shaft 15 from the PTO shaft 16 of the tractor vehicle body 2 through a joint 17. The power transmitted to the PIC shaft 15 is transmitted to the left rotation shaft 9 via the gear transmission mechanism 18 in the gear case 4, the transmission shaft 19 in the left support arm 5 </ b> L, and the chain transmission mechanism 20 in the transmission case 6. The The claw shaft 10 is rotationally driven around the axis by the power transmitted to the left rotation shaft 9.

爪軸１０は図１に示す矢印Ａ方向に回転駆動する。この爪軸１０には爪取付フランジ２１が固定され、この爪取付フランジ２１には耕耘爪２２Ａ，２２Ｂが取付固定される。これら爪軸１０、爪取付フランジ２１、耕耘爪２２Ａ，２２Ｂでロータリ耕耘部２３を形成している。
このロータリ耕耘部２３の上方は主カバー２４（ロータリカバー）によって覆われ、ロータリ耕耘部２３の後方は図示省略の後部カバー（ロータリカバー）によって覆われる。 The claw shaft 10 is driven to rotate in the direction of arrow A shown in FIG. A claw attachment flange 21 is fixed to the claw shaft 10, and tilling claws 22 </ b> A and 22 </ b> B are attached and fixed to the claw attachment flange 21. These claw shaft 10, claw mounting flange 21, and tilling claws 22A and 22B form a rotary tilling portion 23.
The upper part of the rotary tiller 23 is covered with a main cover 24 (rotary cover), and the rear of the rotary tiller 23 is covered with a rear cover (rotary cover) (not shown).

サイドフレーム７及び伝動ケース６には、耕深調整用のスキッド２５が上下位置調整自在にかつ着脱自在に取付けられている。なお、左右スキッド２５はどちらか片方のみでもよい。
このロータリ耕耘装置１にあっては、ロータリ耕耘部２３を図１の矢印Ａ方向に回転駆動することにより、耕耘爪２２Ａ,２２Ｂが土壌に突入して該土壌を耕起すると共に、該耕起した土塊を後方に放てきして後部カバーに衝当させて砕土する。 A skid 25 for adjusting the tilling depth is attached to the side frame 7 and the transmission case 6 so as to be adjustable in the vertical position and detachably. Only one of the left and right skids 25 may be provided.
In this rotary tiller 1, the rotary tiller 23 is driven to rotate in the direction of arrow A in FIG. 1, so that the tilling claws 22 </ b> A and 22 </ b> B enter the soil and plow the soil. The crushed soil is thrown back and hit the rear cover to crush the soil.

前記爪軸１０は左右方向の軸心を有する円筒状回転軸であり、前記爪取付フランジ２１は爪軸１０の軸心方向（左右方向）に一定の間隔をおいて多数枚（複数枚）設けられている。
本実施形態では、爪軸１０の軸心方向の両端部に固定された爪取付フランジ２１が回転軸９にボルト固定されている。なお、爪軸１０の軸心方向の両端部に、回転軸９に取付固定される連結用のフランジを設けてもよい。 The claw shaft 10 is a cylindrical rotating shaft having a left-right axis, and the claw mounting flange 21 is provided in a plurality (a plurality) at regular intervals in the axial direction (left-right direction) of the claw shaft 10. It has been.
In the present embodiment, the claw mounting flanges 21 fixed to both ends of the claw shaft 10 in the axial direction are bolted to the rotary shaft 9. In addition, you may provide the flange for a connection attached and fixed to the rotating shaft 9 in the both ends of the axial direction of the nail | claw axis | shaft 10. FIG.

前記爪取付フランジ２１には、種類の異なる２種の耕耘爪２２Ａ,２２Ｂが選択的に取り付け可能とされている。本実施形態では、Ｌ型爪２２Ａ（第１耕耘爪）と、なた爪２２Ｂ（第２耕耘爪）とが選択的に取り付け可能とされている。なお、Ｌ型爪２２ＡはＬカーブ爪と呼称される場合があり、なた爪２２ＢはＣカーブ爪と呼称される場合がある。
図２〜図４は、各爪取付フランジ２１に、Ｌ型爪２２Ａを取り付けた場合を示しており、図５及び図６は、各爪取付フランジ２１に、なた爪２２Ｂを取り付けた場合を示している。また、爪取付フランジ２１にＬ型爪２２Ａか、又は、なた爪２２Ｂを取り付ける場合、例えば、Ｌ型爪２２Ａは砕土性が要求される場合に取り付けられ、なた爪２２Ｂは土の反転性が要求される場合に取り付けられる。また、図例では、Ｌ型爪２２Ａは、１枚の爪取付フランジ２１に６本取り付け可能とされ、なた爪２２Ｂは、１枚の爪取付フランジ２１に４本取り付け可能とされている。 Two different types of tilling claws 22A and 22B can be selectively attached to the claw mounting flange 21. In the present embodiment, the L-shaped claw 22A (first tilling claw) and the claw 22B (second tilling claw) can be selectively attached. Note that the L-shaped claw 22A may be referred to as an L-curve claw, and the egg nail 22B may be referred to as a C-curve claw.
2 to 4 show a case where the L-shaped claw 22A is attached to each claw mounting flange 21, and FIGS. 5 and 6 show a case where the claw 22B is attached to each claw mounting flange 21. FIG. Show. In addition, when the L-type claw 22A or the heel claw 22B is attached to the claw mounting flange 21, for example, the L-type claw 22A is attached when soil crushing property is required, and the heel claw 22B is soil reversal. Installed when required. In the illustrated example, six L-shaped claws 22 </ b> A can be attached to one claw mounting flange 21, and four nails 22 </ b> B can be attached to one claw mounting flange 21.

図３、図５に示すように、爪取付フランジ２１は、リング状円板によって構成されていて爪軸１０に同心状に外嵌され、該爪軸１０に溶接等によって取付固定されている。この爪取付フランジ２１の外周側には、Ｌ型爪２２Ａを取り付けるための第１爪取付部２８が爪取付フランジ２１の周方向に複数（本実施形態では６つ）設けられている。１つの第１爪取付部２８に１本のＬ型爪２２Ａが取り付けられる。   As shown in FIGS. 3 and 5, the claw mounting flange 21 is configured by a ring-shaped disk, is fitted concentrically on the claw shaft 10, and is fixed to the claw shaft 10 by welding or the like. A plurality (six in this embodiment) of first claw mounting portions 28 for mounting the L-shaped claw 22 </ b> A are provided on the outer peripheral side of the claw mounting flange 21 in the circumferential direction of the claw mounting flange 21. One L-shaped claw 22A is attached to one first claw attaching portion 28.

この第１爪取付部２８は、爪軸回転方向Ａ前後一対の爪取付ボルト挿通孔２９Ｆ，２９Ｒによって構成され、この爪取付ボルト挿通孔２９Ｆ，２９Ｒは爪取付フランジ２１に貫通形成されている。また、１枚の爪取付フランジ２１に設けられた全ての第１爪取付部２８の爪取付ボルト挿通孔２９Ｆ，２９Ｒは爪軸１０の軸心を中心とする同一円周Ｘ上に形成されている。   The first claw mounting portion 28 is constituted by a pair of claw mounting bolt insertion holes 29F and 29R before and after the claw shaft rotation direction A. The claw mounting bolt insertion holes 29F and 29R are formed through the claw mounting flange 21. Further, the claw mounting bolt insertion holes 29F and 29R of all the first claw mounting portions 28 provided in one claw mounting flange 21 are formed on the same circumference X centered on the axis of the claw shaft 10. Yes.

また、爪取付フランジ２１には、なた爪２２Ｂを取り付けるための第２爪取付部３０が、第１爪取付部２８の爪取付フランジ２１内周側において、爪取付フランジ２１の周方向に複数（本実施形態では４つ）設けられている。１つの第２爪取付部２８に１本のなた爪２２Ｂが取り付けられる。
この第２爪取付部３０は、爪軸回転方向Ａ前後一対の爪取付ボルト挿通孔３１Ｆ，３１
Ｒによって構成され、この爪取付ボルト挿通孔３１Ｆ，３１Ｒは爪取付フランジ２１に貫通形成されている。また、この爪取付ボルト挿通孔３１Ｆ，３１Ｒのうち、爪軸回転方向Ａ前側の爪取付ボルト挿通孔３１Ｆは爪軸１０の軸心を中心とする同一円周Ｙ上に形成され、爪軸回転方向Ａ後側の爪取付ボルト挿通孔３１Ｒは、前記爪軸回転方向Ａ前側の爪取付ボルト挿通孔３１Ｆよりも径外側に位置する同一円周Ｚ上に形成されている。 The claw mounting flange 21 includes a plurality of second claw mounting portions 30 for mounting the claw 22B in the circumferential direction of the claw mounting flange 21 on the inner peripheral side of the claw mounting flange 21 of the first claw mounting portion 28. (Four in this embodiment) are provided. One single claw 22B is attached to one second claw attachment portion 28.
The second claw mounting portion 30 has a pair of claw mounting bolt insertion holes 31F, 31 in the claw shaft rotation direction A front and rear.
The claw mounting bolt insertion holes 31 </ b> F and 31 </ b> R are formed through the claw mounting flange 21. Of the claw mounting bolt insertion holes 31F and 31R, the claw mounting bolt insertion hole 31F on the front side in the claw shaft rotation direction A is formed on the same circumference Y centering on the axis of the claw shaft 10 to rotate the claw shaft. The claw mounting bolt insertion hole 31R on the rear side in the direction A is formed on the same circumference Z located on the outer diameter side than the claw mounting bolt insertion hole 31F on the front side in the claw shaft rotation direction A.

なお、前記各爪取付フランジ２１は、左右方向一方から他方に行くにつれて、順次、爪軸回転方向Ａに２０°ずつ位相をずらして配設されている。
図２、図３に示すように、前記Ｌ型爪２２Ａは、板材をＬ字形に屈曲形成してなり、爪取付フランジ２１に取り付けられる取付基部３２と、この取付基部３２から爪取付フランジ２１の径方向外方に向かうに従って爪軸回転方向Ａ後方に移行する方向に延出する縦板部３３と、この縦板部３３の延出端側から左右方向に延出する横板部３４とを有する。取付基部３２と縦板部３３とは板面が左右方向を向くように取り付けられ、横板部３４は縦板部３３に対して略直交している。 The claw mounting flanges 21 are sequentially arranged with a phase shift of 20 ° in the claw axis rotation direction A from one side to the other side in the left-right direction.
As shown in FIGS. 2 and 3, the L-shaped claw 22 </ b> A is formed by bending a plate material into an L-shape, and a mounting base 32 attached to the claw mounting flange 21, and the claw mounting flange 21 from the mounting base 32. A vertical plate portion 33 extending in the direction of shifting to the rear of the claw shaft rotation direction A as it goes radially outward, and a horizontal plate portion 34 extending in the left-right direction from the extended end side of the vertical plate portion 33 Have. The attachment base portion 32 and the vertical plate portion 33 are attached so that the plate surfaces face the left and right directions, and the horizontal plate portion 34 is substantially orthogonal to the vertical plate portion 33.

縦板部３３及び横板部３４の爪軸回転方向Ａ前縁側には、それぞれ刃部が形成され、横板部３４には、縦板部３３からの延出方向の外端部にも刃部が形成されている。
また、Ｌ型爪２２Ａの取付基部３２には、該取付基部３２を爪取付フランジ２１の側面に重ね合わせた状態で前記第１爪取付部２８を構成する一対の爪取付ボルト挿通孔２９Ｆ，２９Ｒに一致する一対のボルト挿通穴３５Ｆ，３５Ｒが貫通形成されている。 Blade portions are respectively formed on the front edge side of the vertical plate portion 33 and the horizontal plate portion 34 in the claw axis rotation direction A. The horizontal plate portion 34 also has a blade on the outer end portion in the extending direction from the vertical plate portion 33. The part is formed.
Further, the attachment base 32 of the L-shaped claw 22A has a pair of claw attachment bolt insertion holes 29F and 29R constituting the first claw attachment 28 in a state where the attachment base 32 is superimposed on the side surface of the claw attachment flange 21. A pair of bolt insertion holes 35 </ b> F and 35 </ b> R corresponding to is formed through.

図４に示すように、このＬ型爪２２Ａは、その取付基部３２を爪取付フランジ２１の一側面に重ね合わせると共に、該Ｌ型爪２２Ａのボルト挿通穴３５Ｆ，３５Ｒと第１爪取付部２８の爪取付ボルト挿通孔２９Ｆ，２９Ｒとを一致させ、これらボルト挿通穴３５Ｆ，３５Ｒ及び爪取付ボルト挿通孔２９Ｆ，２９Ｒに爪取付ボルト３６を挿通し、該爪取付ボルト３６に爪取付ナット３７を螺合することにより、Ｌ型爪２２Ａが爪取付フランジ２１に締結固定される。   As shown in FIG. 4, the L-type claw 22A has its mounting base 32 superimposed on one side surface of the claw mounting flange 21, and the bolt insertion holes 35F and 35R of the L-type claw 22A and the first claw mounting portion 28. The claw mounting bolt insertion holes 29F and 29R are aligned with each other, the claw mounting bolts 36 are inserted into the bolt insertion holes 35F and 35R and the claw mounting bolt insertion holes 29F and 29R, and the claw mounting nuts 37 are inserted into the claw mounting bolts 36. The L-shaped claw 22A is fastened and fixed to the claw mounting flange 21 by screwing.

また、本実施形態では、左端の爪取付フランジ２１の右側面にサイドフレーム７側に向かって屈曲している右向きのＬ型爪２２Ａが取り付けられ、右端の爪取付フランジ２１の左側面に伝動ケース６側に向かって屈曲している左向きのＬ型爪２２Ａが取り付けられている。また、その他の爪取付フランジ２１にあっては、該取付フランジ２１の左側面に、右向きのＬ型爪２２Ａと左向きのＬ型爪２２Ａとが爪軸回転方向Ａに交互に取り付けられている。   In the present embodiment, the right-side L-shaped claw 22A bent toward the side frame 7 is attached to the right side of the left end claw mounting flange 21, and the transmission case is attached to the left side of the right end claw mounting flange 21. A left-facing L-shaped claw 22A that is bent toward the 6th side is attached. Further, in the other claw mounting flange 21, the L-shaped claw 22 </ b> A facing right and the L-shaped claw 22 </ b> A facing left are alternately mounted on the left side surface of the mounting flange 21 in the claw axis rotation direction A.

図５、図６に示すように、前記なた爪２２Ｂは、板材を湾曲状に屈曲形成してなり、爪取付フランジ２１に取り付けられる取付基部３８と、この取付基部３８から爪取付フランジ２１の径方向外方に向かうに従って爪軸回転方向Ａ後方に移行する方向に延出する直刃部３９と、この直刃部３９から延出端側から左右方向に延出する湾曲部４０とを有する。
取付基部３８と直刃部３９とは板面が左右方向を向くように取り付けられ、湾曲部４０は直刃部３９の板厚方向の一側面から他側面へと湾曲状に曲げられている。 As shown in FIGS. 5 and 6, the above-mentioned claw 22B is formed by bending a plate material into a curved shape, and an attachment base 38 to be attached to the claw attachment flange 21 and the claw attachment flange 21 from the attachment base 38. A straight blade portion 39 extending in the direction of shifting to the rear of the claw axis rotation direction A as it goes radially outward, and a curved portion 40 extending from the straight blade portion 39 in the left-right direction from the extending end side. .
The attachment base portion 38 and the straight blade portion 39 are attached so that the plate surfaces face the left and right directions, and the bending portion 40 is bent in a curved shape from one side surface to the other side surface in the plate thickness direction of the straight blade portion 39.

直刃部３９及び湾曲部４０の爪軸回転方向Ａ前縁側には、それぞれ刃部が形成されている。
また、なた爪２２Ｂの取付基部３８には、該取付基部３８を爪取付フランジ２１の側面に重ね合わせた状態で前記第２爪取付部３０を構成する一対の爪取付ボルト挿通孔３１Ｆ，３１Ｒに一致する一対のボルト挿通穴４１Ｆ，４１Ｒが貫通形成されている。 On the front edge side of the straight blade portion 39 and the bending portion 40 in the claw axis rotation direction A, blade portions are respectively formed.
Further, the mounting base portion 38 of the nail 22B has a pair of claw mounting bolt insertion holes 31F and 31R that constitute the second claw mounting portion 30 in a state where the mounting base portion 38 is superimposed on the side surface of the claw mounting flange 21. A pair of bolt insertion holes 41 </ b> F and 41 </ b> R corresponding to is formed through.

図５に示すように、このなた爪２２Ｂは、その取付基部３８を爪取付フランジ２１の一側面に重ね合わせると共に、該なた爪２２Ｂのボルト挿通穴４１Ｆ，４１Ｒと第２爪取付部３０の爪取付ボルト挿通孔３１Ｆ，３１Ｒとを一致させ、これらボルト挿通穴４１Ｆ，４１Ｒ及び爪取付ボルト挿通孔３１Ｆ，３１Ｒに爪取付ボルト３６を挿通し、該爪取付ボルト３６に爪取付ナット３７を螺合することにより、なた爪２２Ｂが爪取付フランジ２１に締結固定される。   As shown in FIG. 5, this claw 22B has its mounting base 38 superimposed on one side surface of the claw mounting flange 21, and the bolt insertion holes 41F and 41R of the claw 22B and the second claw mounting portion 30. The claw mounting bolt insertion holes 31F and 31R are aligned with each other, the claw mounting bolts 36 are inserted into the bolt insertion holes 41F and 41R and the claw mounting bolt insertion holes 31F and 31R, and the claw mounting nuts 37 are inserted into the claw mounting bolts 36. By screwing, the claw 22B is fastened and fixed to the claw mounting flange 21.

また、本実施形態では、左端の爪取付フランジ２１の右側面にサイドフレーム７側に向かって屈曲している右向きのなた爪２２Ｂが取り付けられ、右端の爪取付フランジ２１の左側面に伝動ケース６側に向かって屈曲している左向きのなた爪２２Ｂが取り付けられて
いる。また、その他の爪取付フランジ２１にあっては、爪取付フランジ２１の左側面と右側面のそれぞれに、右向きのなた爪２２Ｂと左向きのなた爪２２Ｂとが１本ずつ取り付けられている。 Further, in this embodiment, a right-sided claw 22B bent toward the side frame 7 is attached to the right side surface of the left end claw mounting flange 21, and a transmission case is attached to the left side surface of the right end claw mounting flange 21. A left-handed nail 22B bent toward the 6th side is attached. Further, in the other claw mounting flange 21, one right claw 22 </ b> B and one left claw 22 </ b> B are attached to each of the left side surface and the right side surface of the claw installation flange 21.

前記構成のロータリ耕耘装置１にあっては、１台のロータリ耕耘装置１の爪取付フランジ２１に、異なる種類の耕耘爪２２Ａ，２２Ｂ（Ｌ型爪２２Ａとなた爪２２Ｂと）を選択的に取り付けることができるので、１台のロータリ耕耘装置１を作業に応じた仕様に変更することができる。
また、第１爪取付部２８の爪取付フランジ２１内周側に第２爪取付部３０を設けたので、Ｌ型爪２２Ａの取付位置と、なた爪２２Ｂの取付位置とを容易に識別することができ、耕耘爪２２Ａ，２２Ｂの付け間違いを防止することができる。 In the rotary tiller 1 configured as described above, different types of tilling claws 22A and 22B (with the claws 22B formed as L-shaped claws 22A) are selectively applied to the pawl mounting flange 21 of one rotary tiller 1. Since it can attach, the one rotary tiller 1 can be changed into the specification according to work.
In addition, since the second claw mounting portion 30 is provided on the inner peripheral side of the claw mounting flange 21 of the first claw mounting portion 28, the mounting position of the L-shaped claw 22A and the mounting position of the leg claw 22B are easily identified. It is possible to prevent mistakes in attaching the tilling claws 22A and 22B.

また、図１に示すように、第１爪取付部２８に取り付けられた状態でのＬ型爪２２Ａの最大回転軌跡Ｋと、第２爪取付部３０に取り付けられた状態でのなた爪２２Ｂの最大回転軌跡Ｋとが略一致する位置に、前記第１爪取付部２８と第２爪取付部３０とが設けられている。
したがって、Ｌ型爪２２Ａを取り付けた場合でも、なた爪２２Ｂを取り付けた場合でも、耕耘爪２２Ａ，２２Ｂの最大回転軌跡Ｋが変わらないので、ロータリ耕耘部２３と該ロータリ耕耘部２３を覆うロータリカバー（主カバー２４等）との間の隙間を、Ｌ型爪２２Ａを取り付けた場合となた爪２２Ｂを取り付けた場合とで、略同じ隙間にすることができる。 Further, as shown in FIG. 1, the maximum rotation trajectory K of the L-shaped claw 22A attached to the first claw attachment portion 28 and the claw 22B attached to the second claw attachment portion 30. The first claw mounting portion 28 and the second claw mounting portion 30 are provided at a position where the maximum rotation trajectory K substantially coincides.
Therefore, the maximum rotation trajectory K of the tilling claws 22A and 22B does not change regardless of whether the L-shaped claws 22A or the elongate claws 22B are attached. The gap between the cover (main cover 24 and the like) can be made substantially the same between the case where the claw 22B is attached and the case where the L-type claw 22A is attached.

また、本実施形態のロータリ耕耘装置１にあっては、図２に示すように、爪軸１０に草が巻き付くのを防止する草巻付き防止部材５１が設けられている。
この草巻付き防止部材５１は、ワイヤやロッド（棒状鋼材）等の左右方向に長尺の線状部材によって構成されている。
本実施形態の草巻付き防止部材５１は、左右一端の爪取付フランジ２１から左右他端の爪取付フランジ２１にわたって設けられている。 Further, in the rotary tiller 1 of the present embodiment, as shown in FIG. 2, an anti-weeding member 51 for preventing grass from being wound around the claw shaft 10 is provided.
This anti-cigarette prevention member 51 is comprised by the linear member long in the left-right direction, such as a wire and a rod (rod-shaped steel material).
The cigarette prevention member 51 of this embodiment is provided from the claw mounting flange 21 at the left and right ends to the claw mounting flange 21 at the left and right ends.

また、図４に示すように、草巻付き防止部材５１の端部には固定手段５２が設けられている。この固定手段５２は、図４（ａ）に示すように、草巻付き防止部材５１の端部に設けられた雄ネジ部５３と、この雄ネジ部５３に螺合されるナット部材５４とから構成されている。
この草巻付き防止部材５１の端部側を爪取付フランジ２１に取り付けるには、使われていない爪取付ボルト挿通孔２９Ｆ，２９Ｒ，３１Ｆ，３１Ｒを利用する。図４に示す例では、爪取付フランジ２１にＬ型爪２２Ａが取付固定されているので、なた爪２２Ｂを取り付けるための第２爪取付部３０の爪取付ボルト挿通孔３１Ｆ，３１Ｒを利用する。すなわち、雄ネジ部５３を爪取付ボルト挿通孔３１Ｆ，３１Ｒに挿通し、その後、雄ネジ部５３にナット部材５４を螺合して締め付けることにより、草巻付き防止部材５１が爪取付フランジ２１に取り付けられる。これによって、草巻付き防止部材５１を取り付けるための取付部を別途設ける必要がなく、コストアップを抑えることができるという効果を奏する。 Further, as shown in FIG. 4, a fixing means 52 is provided at the end of the anti-cigarette prevention member 51. As shown in FIG. 4A, the fixing means 52 includes a male screw portion 53 provided at an end portion of the anti-winding member 51 and a nut member 54 screwed into the male screw portion 53. It is configured.
In order to attach the end portion side of the cigarette prevention member 51 to the claw attachment flange 21, unused claw attachment bolt insertion holes 29F, 29R, 31F, 31R are used. In the example shown in FIG. 4, since the L-shaped claw 22A is fixedly attached to the claw mounting flange 21, the claw mounting bolt insertion holes 31F and 31R of the second claw mounting portion 30 for mounting the claw 22B are used. . That is, the male thread portion 53 is inserted into the claw mounting bolt insertion holes 31F and 31R, and then the nut member 54 is screwed and tightened to the male screw portion 53, so that the grass winding prevention member 51 is attached to the claw mounting flange 21. It is attached. Accordingly, there is no need to separately provide an attachment portion for attaching the cigarette prevention member 51, and an effect of suppressing an increase in cost can be achieved.

また、草巻付き防止部材５１は、使われていない爪取付ボルト挿通孔２９Ｆ，２９Ｒ，３１Ｆ，３１Ｒを挿通することで該草巻付き防止部材５１が一対の爪取付フランジ２１間に配置可能とされている。図４に示す例では、第２爪取付部３０の爪取付ボルト挿通孔３１Ｆ，３１Ｒを草巻付き防止部材５１が挿通している。これによって、爪取付フランジ２１に草巻付き防止部材５１の挿通用の孔を別途形成する必要がなく、コストアップを抑えることができるという効果を奏する。   Further, the cigarette prevention member 51 can be disposed between the pair of claw attachment flanges 21 by inserting the claw attachment bolt insertion holes 29F, 29R, 31F, 31R which are not used. Has been. In the example illustrated in FIG. 4, the anti-cigarette prevention member 51 is inserted through the claw mounting bolt insertion holes 31 </ b> F and 31 </ b> R of the second claw mounting portion 30. Accordingly, there is no need to separately form a hole for inserting the cigarette prevention member 51 in the claw mounting flange 21, and an effect of suppressing an increase in cost can be achieved.

また、前述したように、本実施形態では、前記各爪取付フランジ２１は、左右方向一方から他方に行くにつれて、順次、爪軸回転方向Ａに２０°ずつ位相をずらして配設されていることから、草巻付き防止部材５１は、爪軸１０に対して平行にはならなく、爪軸１０の周囲に螺旋状に配置される。なお、草巻付き防止部材５１を棒状鋼材で形成する場合は、該草巻付き防止部材５１を予め螺旋状に形成しておく。   Further, as described above, in the present embodiment, the claw mounting flanges 21 are sequentially arranged with a phase shifted by 20 ° in the claw axis rotation direction A from one side to the other in the left-right direction. Therefore, the cigarette prevention member 51 does not become parallel to the claw shaft 10 but is arranged in a spiral shape around the claw shaft 10. In addition, when forming the cigarette prevention member 51 with a rod-shaped steel material, the cigarette prevention member 51 is previously formed in a spiral shape.

また、草巻付き防止部材５１の一方の固定手段５２は、図４（ｂ）に示すように、草巻付き防止部材５１の端部を扁平にすることで拡大した拡大部によって形成されていてもよ
い。
また、図例では、草巻付き防止部材５１は、左右一端の爪取付フランジ２１から左右他端の爪取付フランジ２１にわたって１本の線状部材によって構成されているが、これに限定されることはなく、複数本の草巻付き防止部材５１を爪軸１０の軸心に沿って配置してもよい。すなわち、草巻付き防止部材５１は、１つまたは複数の爪取付フランジ２１を間に挟んで爪軸１０軸心方向に離間した一対の爪取付フランジ２１間に配置、又は、左右方向で隣り合う爪取付フランジ２１間にそれぞれ配置されてもよい。 Further, as shown in FIG. 4B, one fixing means 52 of the cigarette prevention member 51 is formed by an enlarged portion that is enlarged by flattening the end portion of the cigarette prevention member 51. Also good.
In the illustrated example, the cigarette prevention member 51 is constituted by one linear member extending from the claw mounting flange 21 at the left and right ends to the claw mounting flange 21 at the left and right ends, but is not limited thereto. Instead, a plurality of cigarette winding prevention members 51 may be arranged along the axis of the claw shaft 10. In other words, the cigarette prevention member 51 is disposed between a pair of claw mounting flanges 21 spaced in the axial direction of the claw shaft 10 with one or more claw mounting flanges 21 therebetween, or adjacent in the left-right direction. You may arrange | position between the nail | claw attachment flanges 21, respectively.

なお、各爪取付フランジ２１になた爪２２Ｂを取り付けた場合にあっては、草巻付き防止部材５１は、Ｌ型爪２２Ａを取り付けるための第１爪取付部２８を構成する爪取付ボルト挿通孔２９Ｆ，２９Ｒを介して固定されると共に、該爪取付ボルト挿通孔２９Ｆ，２９Ｒに挿通される。   When the claw 22B is attached to each claw mounting flange 21, the cigarette prevention member 51 is inserted into the claw mounting bolt that constitutes the first claw mounting portion 28 for mounting the L-shaped claw 22A. While being fixed through the holes 29F and 29R, the claw mounting bolt insertion holes 29F and 29R are inserted.

１０ 爪軸
２１ 爪取付フランジ
２２Ａ 第１耕耘爪（Ｌ型爪）
２２Ｂ 第２耕耘爪（なた爪）
２８ 第１爪取付部
２９Ｆ 爪取付ボルト挿通孔
２９Ｒ 爪取付ボルト挿通孔
３０ 第２爪取付部
３１Ｆ 爪取付ボルト挿通孔
３１Ｒ 爪取付ボルト挿通孔
３６ 爪取付ボルト
５１ 草巻付き防止部材
Ｋ 耕耘爪の最大回転軌跡 10 Claw shaft 21 Claw mounting flange 22A First tillage claw (L-type claw)
22B Second tillage nail
28 1st claw mounting portion 29F Claw mounting bolt insertion hole 29R Claw mounting bolt insertion hole 30 2nd claw mounting portion 31F Claw mounting bolt insertion hole 31R Claw mounting bolt insertion hole 36 Claw mounting bolt 51 Anti-weeding member K Maximum rotation trajectory

Claims (6)

軸心回りに回転駆動可能な爪軸の外周に、爪取付フランジを爪軸軸心方向に複数設け、各爪取付フランジに、第１耕耘爪を取り付けるための第１爪取付部を爪取付フランジの周方向に複数設けると共に、この第１爪取付部の爪取付フランジ内周側において、前記第１耕耘爪とは種類の異なる第２耕耘爪を取り付けるための第２爪取付部を爪取付フランジの周方向に複数設けており、
前記第１耕耘爪と前記第２耕耘爪は爪取付ボルトを介して爪取付フランジに選択的に締結固定され、第１爪取付部と第２爪取付部は、前記爪取付ボルトを挿通する爪取付ボルト挿通孔からなり、
１枚の爪取付フランジに設けられた第１爪取付部の爪取付ボルト挿通孔は、爪軸の軸心を中心とする第１の円周上に形成され、
前記１枚の爪取付フランジに設けられた第２爪取付部の爪取付ボルト挿通孔は、爪軸の軸心を中心とし且つ前記第１の円周よりも径内側に位置する第２の円周上と、爪軸の軸心を中心とし且つ前記第２の円周よりも径内側に位置する第３の円周上に形成され、
前記第２耕耘爪は、爪軸回転方向の一方側が前記第２の円周上に位置する爪取付ボルト挿通孔に取り付け可能であり、爪軸回転方向の他方側が前記第３の円周上に位置する爪取付ボルト挿通孔に取り付け可能であるロータリ耕耘装置。 A plurality of claw mounting flanges are provided in the direction of the claw axis on the outer periphery of the claw shaft that can be driven to rotate around the axis, and the first claw mounting portion for mounting the first tillage claw is attached to each claw mounting flange. The claw mounting flange is provided with a second claw mounting portion for mounting a second tilling claw that is different from the first tilling claw on the inner circumferential side of the claw mounting flange of the first claw mounting portion. and plurality in the circumferential direction of,
The first tillage claw and the second tillage claw are selectively fastened and fixed to a claw attachment flange via a claw attachment bolt, and the first claw attachment portion and the second claw attachment portion are claws through which the claw attachment bolt is inserted. It consists of mounting bolt insertion holes,
The claw mounting bolt insertion hole of the first claw mounting portion provided in one claw mounting flange is formed on the first circumference centered on the axis of the claw shaft,
The claw mounting bolt insertion hole of the second claw mounting portion provided on the one claw mounting flange is a second circle centered on the axis of the claw shaft and located on the inner diameter side than the first circumference. Formed on a circumference and a third circumference centered on the axis of the claw axis and located on the inner side of the second circumference,
The second tillage claw can be attached to a claw mounting bolt insertion hole located on one side in the claw axis rotation direction on the second circumference, and the other side in the claw axis rotation direction on the third circumference. A rotary tiller that can be attached to the nail attachment bolt insertion hole . 軸心回りに回転駆動可能な爪軸の外周に、爪取付フランジを爪軸軸心方向に複数設け、各爪取付フランジに、第１耕耘爪を取り付けるための第１爪取付部を爪取付フランジの周方向に複数設けると共に、この第１爪取付部の爪取付フランジ内周側において、前記第１耕耘爪とは種類の異なる第２耕耘爪を取り付けるための第２爪取付部を爪取付フランジの周方向に複数設けており、
前記第１耕耘爪と前記第２耕耘爪は爪取付ボルトを介して爪取付フランジに選択的に締結固定され、第１爪取付部と第２爪取付部は、それぞれ前記爪取付ボルトを挿通する一対の爪取付ボルト挿通孔から構成されており、
前記第２耕耘爪は、前記第２爪取付部を構成する一対の爪取付ボルト挿通孔のうちの一方の爪取付ボルト挿通孔に取り付け可能な一方取付部と、他方の爪取付ボルト挿通孔に取り付け可能な他方取付部とを有し、且つ、前記第２爪取付部に取り付けた状態において前記一方取付部と前記他方取付部とを結ぶ直線の中点に直交する直線が前記爪取付フランジの中心から外れるロータリ耕耘装置。 A plurality of claw mounting flanges are provided in the direction of the claw axis on the outer periphery of the claw shaft that can be driven to rotate around the axis, and the first claw mounting portion for mounting the first tillage claw is attached to each claw mounting flange. The claw mounting flange is provided with a second claw mounting portion for mounting a second tilling claw that is different from the first tilling claw on the inner circumferential side of the claw mounting flange of the first claw mounting portion. and plurality in the circumferential direction of,
The first tillage claw and the second tillage claw are selectively fastened and fixed to a claw attachment flange via a claw attachment bolt, and the first claw attachment portion and the second claw attachment portion respectively penetrate the claw attachment bolt. It consists of a pair of claw mounting bolt insertion holes,
The second tillage claw is attached to one attachment portion that can be attached to one of the pair of claw attachment bolt insertion holes constituting the second claw attachment portion and the other claw attachment bolt insertion hole. A straight line perpendicular to a midpoint of a straight line connecting the one attachment part and the other attachment part in a state of being attached to the second claw attachment part. Rotary tillage device off the center . １枚の前記爪取付フランジに取り付けられる前記第１耕耘爪の数と前記第２耕耘爪の数が異なる請求項１又は２に記載のロータリ耕耘装置。 The rotary tiller according to claim 1 or 2, wherein the number of the first tilling claws attached to one of the claws mounting flanges is different from the number of the second tilling claws . 前記複数の第２爪取付部は、前記爪取付フランジの周方向に同一ピッチで配置され、
前記複数の第１爪取付部は、前記爪取付フランジの周方向に複数の異なるピッチで配置されている請求項１〜３のいずれか１項に記載のロータリ耕耘装置。 The plurality of second claw mounting portions are arranged at the same pitch in the circumferential direction of the claw mounting flange,
The rotary tiller according to any one of claims 1 to 3, wherein the plurality of first claw mounting portions are arranged at a plurality of different pitches in a circumferential direction of the claw mounting flange . 前記第１耕耘爪は、前記爪取付フランジの一方の側面に取り付けられ、  The first tillage claw is attached to one side surface of the claw mounting flange,
前記第２耕耘爪は、前記爪取付フランジの一方の側面及び他方の側面にそれぞれ取り付けられている請求項１〜４のいずれか１項に記載のロータリ耕耘装置。  The rotary tiller according to any one of claims 1 to 4, wherein the second tillage claw is attached to one side surface and the other side surface of the claw mounting flange, respectively. 複数の前記爪取付フランジは、前記爪軸軸心方向の一方から他方にいくにつれて、順次、爪軸回転方向に位相をずらして配設されており、The plurality of claw mounting flanges are sequentially arranged with a phase shifted in the claw axis rotation direction from one to the other in the claw axis direction.
爪軸軸心方向に離間した一対の爪取付フランジ間に草巻付き防止部材が配置され、A cigarette prevention member is disposed between a pair of claw mounting flanges spaced apart in the axial direction of the claw axis,
前記草巻付き防止部材は、前記爪取付フランジの使われていない爪取付ボルト挿通孔を挿通することで、前記一対の爪取付フランジ間に且つ前記爪軸の周囲に螺旋状に配置される請求項１〜５のいずれか１項に記載のロータリ耕耘装置。The cigarette prevention member is spirally disposed between the pair of claw mounting flanges and around the claw shaft by inserting a claw mounting bolt insertion hole that is not used by the claw mounting flange. Item 6. A rotary tiller according to any one of Items 1 to 5.
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