JP6012477B2

JP6012477B2 - Weeder

Info

Publication number: JP6012477B2
Application number: JP2013001347A
Authority: JP
Inventors: 賢司深谷
Original assignee: 賢司深谷
Priority date: 2013-01-08
Filing date: 2013-01-08
Publication date: 2016-10-25
Anticipated expiration: 2033-01-08
Also published as: JP2014132844A

Description

本発明は、手動若しくは自動で走行可能な除草機に関する。 The present invention relates to a weeder capable of traveling manually or automatically.

従来、除草機としては、例えば、進行方向に対して直交するように左右方向に沿って配置されて駆動源の駆動時に回転される回転軸に、鋸刃状の除草部材を、回転軸に沿わせるとともに、回転軸の略全長にわたる長尺状として、複数個、回転軸の周囲に放射状に配置させ、走行時に回転軸を回転させることにより、回転する除草部材によって、地面に生えている雑草を引き抜く構成のものがあった（例えば、特許文献１参照）。 Conventionally, as a weeder, for example, a saw blade-shaped weeding member is provided along a rotating shaft along a rotating shaft that is arranged along the left-right direction so as to be orthogonal to the traveling direction and is rotated when the driving source is driven. In addition, the weeds that grow on the ground by the rotating weeding member are arranged in a radial shape around the rotating shaft, and the rotating shaft is rotated during traveling. There existed the thing of the structure pulled out (for example, refer patent document 1).

また、除草機としては、走行時に、スコップ状の除草部材を上下させて、地面を掘りつつ、地面に生えている雑草を除去する構成のものもあった（例えば、特許文献２参照）。 Moreover, as a weeder, there existed a thing of the structure which removes the weeds which grew on the ground, moving a scoop-shaped weeding member up and down at the time of driving | running | working, digging the ground (for example, refer patent document 2).

特開２００３−４７３０２公報JP 2003-47302 A 実用新案登録第３１６５００１号Utility model registration No. 3165001

しかし、上記特許文献１に記載の除草機は、除草部材が、左右方向に沿った長尺状とされていることから、左右に広いエリアの雑草を一挙に引き抜くことができるものの、回転軸が露出して配置されていることから、引き抜かれた雑草が回転軸に巻きつき、定期的に回転軸に巻きついた雑草を取り除く作業が必要となっていた。また、上記特許文献２に記載の除草機は、除草部材を上下させて、雑草を除去していることから、除草部材を回転させる場合と比較して、除草効率が良好ではなかった。 However, since the weeding machine described in Patent Document 1 has a long weeding member extending in the left-right direction, it can pull out weeds in a wide area from side to side, but the rotation axis is Since the exposed weeds are wound around the rotating shaft, it is necessary to periodically remove the weeds wound around the rotating shaft. Moreover, since the weeding machine of the said patent document 2 raises / lowers the weeding member and removes weeds, compared with the case where a weeding member is rotated, weeding efficiency was not favorable.

本発明は、上述の課題を解決するものであり、効率よく除草を行うことができ、かつ、メンテナンスも容易な除草機を提供することを目的とする。 The present invention solves the above-described problems, and an object of the present invention is to provide a weeder that can efficiently perform weeding and is easy to maintain.

本発明に係る除草機は、車輪を有して、手動若しくは自動で走行可能な除草機であって、
進行方向に沿った前後両側の少なくとも下部側の領域と、下方と、を開口させて構成されるとともに、左右両側に、車輪を配置させた支持枠部と、
支持枠部の下端近傍において、接地面に近接するように配置されるとともに、進行方向に対して直交するように左右方向に略沿って配置されて、両端側を、支持枠部側に軸支され、駆動源により車輪の回転方向に沿って回転可能とされる回転除草部と、
回転除草部の外周側を覆うように配置されるカバーと、
を備える構成とされて、
回転除草部が、駆動源の駆動時に回転可能とされる回転軸と、板金製とされるとともに回転軸の軸方向に沿って複数配置されてそれぞれ回転軸に連結される除草部本体と、を備え、
各除草部本体が、回転軸の周方向に沿って略放射状に複数配置されて、回転軸の回転時に草を引き抜き可能とされる引抜片を、有する構成とされて、
カバーが、回転除草部の上方を覆う上側部位と、回転除草部の下方を覆う下側部位と、を有するとともに、下側部位に、回転する除草部本体における引抜片の部位を、下方に突出可能とされるスリットを、配設させて構成され、
スリットが、開口幅寸法を、引抜片の厚さ寸法よりも、わずかに大きく設定されていることを特徴とする。 The weeding machine according to the present invention is a weeding machine having wheels and capable of traveling manually or automatically,
A support frame portion in which wheels are arranged on both the left and right sides, and at least the lower region on the front and rear sides along the traveling direction and the lower side are configured to open.
In the vicinity of the lower end of the support frame part, it is arranged so as to be close to the grounding surface, and is arranged substantially along the left-right direction so as to be orthogonal to the traveling direction, and both ends are pivotally supported on the support frame part side. A rotating weeding unit that is rotatable along the direction of rotation of the wheel by a drive source;
A cover arranged to cover the outer peripheral side of the rotary weeding part;
It is set as the composition provided with,
A rotating shaft that is rotatable when the driving source is driven, and a weeding body main body that is made of sheet metal and is arranged along the axial direction of the rotating shaft and coupled to the rotating shaft. Prepared,
Each weeding portion main body is arranged in a plurality of substantially radially along the circumferential direction of the rotating shaft, and is configured to have a drawing piece that can pull out the grass when the rotating shaft rotates,
The cover has an upper portion that covers the upper portion of the rotating weeding portion and a lower portion that covers the lower portion of the rotating weeding portion, and the lower portion protrudes the portion of the extraction piece in the rotating weeding portion main body downward. It is configured by arranging the possible slits,
The slit is characterized in that the opening width dimension is set slightly larger than the thickness dimension of the drawn piece.

本発明の除草機では、回転除草部が、回転軸の軸方向（左右方向）に沿って、複数の除草部本体を備えており、各除草部本体は、回転軸の周方向に沿って略放射状に複数配置される引抜片を、備えて構成されている。そのため、本発明の除草機では、走行時に、左右方向に沿って複数配置される除草部本体を、同時に回転させ、各除草部本体に形成される引抜片の回転方向の前方側となる前縁に草を引っ掛けるようにして、草を引き抜くことができることから、左右に広いエリアの草を略同時に引き抜くことができ、また、各除草部本体には、放射状に複数の引抜片が形成されていることから、各除草部本体によって、効率よく草を引き抜くことができる。また、本発明の除草機では、回転除草部は、外周側をカバーにより覆われており、カバーにおいて回転除草部の下方を覆う下側部位には、引抜片を下方に突出させるスリットが形成されている。すなわち、本発明の除草機では、回転除草部における引抜片のみがスリットを介してカバーから露出される構成であり、回転軸は、カバーによって外周側を略全面にわたって覆われている。また、スリットは、開口幅寸法を、引抜片の厚さ寸法よりわずかに大きく設定されていることから、スリットの周縁部位と引抜片との間に大きな隙間が生じ難く、引き抜かれた草がこのスリットの部位からカバー内に進入することも、抑制できる。そのため、本発明の除草機では、走行時に、回転軸に草が巻きつくことを、的確に防止することができる。 In the weeding machine of the present invention, the rotating weeding unit includes a plurality of weeding unit main bodies along the axial direction (left-right direction) of the rotating shaft, and each weeding unit main body is substantially along the circumferential direction of the rotating shaft. A plurality of extraction pieces arranged radially are provided. Therefore, in the weeding machine of the present invention, during traveling, a plurality of weeding unit main bodies arranged in the left-right direction are simultaneously rotated, and the leading edge that is the front side in the rotation direction of the extraction piece formed in each weeding unit main body The grass can be pulled out as if it is hooked on the grass, so that the grass in a wide area on the left and right can be pulled out substantially simultaneously, and each weeding section main body has a plurality of radially drawn pieces Therefore, grass can be efficiently extracted by each weeding body. In the weeding machine of the present invention, the rotating weeding part is covered with the cover on the outer peripheral side, and a slit for projecting the drawn piece downward is formed in the lower part of the cover that covers the lower part of the rotating weeding part. ing. That is, in the weeding machine of the present invention, only the extracted piece in the rotating weeding part is exposed from the cover through the slit, and the rotating shaft is covered on the entire outer periphery side by the cover. In addition, since the opening width dimension of the slit is set to be slightly larger than the thickness dimension of the extracted piece, it is difficult for a large gap to be formed between the peripheral portion of the slit and the extracted piece. The entry into the cover from the slit portion can also be suppressed. Therefore, in the weeder of the present invention, it is possible to accurately prevent the grass from being wrapped around the rotating shaft during traveling.

したがって、本発明の除草機では、効率よく除草を行うことができ、かつ、メンテナンスも容易である。 Therefore, in the weeder of the present invention, weeding can be performed efficiently and maintenance is easy.

また、本発明の除草機において、除草部本体を、回転軸に連結される円板部と、円板部の外周縁から部分的に突出するように形成される引抜片と、を備える構成とし、
円板部の外周縁側の部位を、スリットから下方に突出させるように、構成することが、好ましい。 Further, in the weeding machine of the present invention, the weeding portion main body includes a disc portion connected to the rotation shaft, and a drawing piece formed so as to partially protrude from the outer peripheral edge of the disc portion. ,
It is preferable that the outer peripheral edge portion of the disk portion is configured to protrude downward from the slit.

除草機を上記構成とすれば、引抜片間の領域においても、スリットが、円板部の外周縁側の部位によって、大部分を閉塞されるような態様となることから、引き抜かれた草がスリットの部位からカバー内に進入することを、極力抑制できて、好ましい。 If the weeder is configured as described above, even in the region between the drawn pieces, the slit is in a mode such that most of the slit is blocked by the outer peripheral side portion of the disc part. It is preferable because it can be suppressed as much as possible to enter the cover from the part.

さらに、上記構成の除草機において、下側部位の後端近傍に、後上方に延びるような傾斜部位を、配置させ、
引抜片において、回転方向の前方側となる前縁を、先端側を回転方向の後側に位置させ、元部側を回転方向の前側に位置させるように、傾斜させて構成することが、好ましい。 Furthermore, in the weeder configured as described above, an inclined portion extending rearward and upward is disposed in the vicinity of the rear end of the lower portion,
In the drawn piece, it is preferable that the front edge that is the front side in the rotational direction is inclined and configured so that the tip side is located on the rear side in the rotational direction and the base part side is located on the front side in the rotational direction. .

上記構成の除草機では、引抜片は、回転方向の前方側となる前縁を、元部側を回転方向の前側に位置させるように傾斜させて形成されており、換言すれば、カバーの下側部位に形成される傾斜部位の前側に位置した状態では、引抜片の回転方向側の前縁は、元部側を傾斜部位側に位置させるように傾斜している。そのため、回転除草部の回転時に、引抜片の前縁側の部位は、下側部位の後端近傍において後上がりに傾斜して配置される傾斜部位に配置されるスリットの部位に、元部側から、順次挿通されるようにして、カバー内に進入することとなる。そして、引抜片がこの傾斜部位に配置されるスリットの部位に挿通される際に、この傾斜部位におけるスリットの周縁部位によって、引抜片の前縁側に絡まっている草を押えられ、引抜片が、元部側から、順次草を抜き取られるような態様となって、引抜片から抜き取られた草が、下方に落下することとなる。そのため、上記構成の除草機では、走行時に、引抜片の前縁側の部位によって引き抜かれた草を、自動的に、引抜片から抜き取って下方の接地面に落下させることができる。 In the weeder configured as described above, the extraction piece is formed by inclining the front edge, which is the front side in the rotational direction, so that the base side is positioned at the front side in the rotational direction. In a state of being positioned on the front side of the inclined portion formed on the side portion, the front edge on the rotational direction side of the extraction piece is inclined so that the base portion side is positioned on the inclined portion side. Therefore, at the time of rotation of the rotary weeding portion, the part on the front edge side of the drawn piece is located from the base part side to the slit part arranged in the inclined part arranged to be inclined rearward in the vicinity of the rear end of the lower part. Then, it is inserted sequentially so as to enter the cover. Then, when the drawn piece is inserted through the slit portion arranged in the inclined portion, the peripheral portion of the slit in the inclined portion is pressed against the grass entangled on the leading edge side of the drawn piece, and the drawn piece is The grass is sequentially extracted from the base portion side, and the grass extracted from the drawn piece falls downward. Therefore, in the weeding machine having the above-described configuration, the grass extracted by the portion on the front edge side of the extracted piece can be automatically extracted from the extracted piece and dropped onto the lower ground surface during traveling.

さらにまた、上記構成の除草機において、傾斜部位の後端近傍に、駆動源により、傾斜部位の下面側に溜まった草を落下させるように駆動可能な草落下機構を配設させる構成とすれば、仮に、引き抜いた草が、落下せず、傾斜部位の下面側に溜まることとなっても、この溜まった草を、草落下機構によって落下させることができて、好ましい。 Furthermore, in the weeder configured as described above, if a grass dropping mechanism that can be driven to drop grass accumulated on the lower surface side of the inclined portion by a driving source is disposed near the rear end of the inclined portion. Even if the extracted grass does not fall and accumulates on the lower surface side of the inclined portion, it is preferable that the accumulated grass can be dropped by the grass dropping mechanism.

さらにまた、上記構成の除草機において、回転除草部及びカバーを支持枠部に対して上下方向の位置を調節可能な位置調節機構を、配設させる構成とすれば、草の生え方や、地面の状態に応じて、回転除草部、すなわち、引抜片の上下の位置を微調節することが可能となって、好ましい。 Furthermore, in the weeder configured as described above, if the rotary weeding unit and the cover are provided with a position adjusting mechanism capable of adjusting the vertical position with respect to the support frame unit, the grass growth and the ground According to the state, it is possible to finely adjust the vertical position of the rotary weeding unit, that is, the drawn piece, which is preferable.

本発明の一実施形態である除草機の側面図である。It is a side view of the weeder which is one embodiment of the present invention. 図１の除草機における部分拡大縦断面図であり、図３のII−II部位を示す図である。FIG. 4 is a partially enlarged longitudinal sectional view of the weeder of FIG. 1 and shows a II-II portion of FIG. 3. 図１の除草機の部分拡大背面図である。It is a partial expanded rear view of the weeder of FIG. 図１の除草機において、下側部位のスリットの部位を示す断面図である。In the weeding machine of FIG. 1, it is sectional drawing which shows the site | part of the slit of a lower part. 図１の除草機において、位置調節機構を構成する操作ハンドル、固定軸部、及び、可動軸部を示す断面図である。FIG. 2 is a cross-sectional view showing an operation handle, a fixed shaft portion, and a movable shaft portion constituting a position adjustment mechanism in the weeder of FIG. 1. 図１の除草機において、除草部本体の回転と、草落下機構を構成するシャッタ部材の動作と、を説明する概略部分拡大断面図である。In the weeding machine of FIG. 1, it is a general | schematic fragmentary expanded sectional view explaining rotation of a weeding part main body and operation | movement of the shutter member which comprises a grass dropping mechanism. 図１の除草機において、位置調整機構を使用して引抜片の上下の位置を変更した状態を説明する概略縦断面図である。In the weeding machine of FIG. 1, it is a schematic longitudinal cross-sectional view explaining the state which changed the up-and-down position of the extraction piece using the position adjustment mechanism. 本発明の他の実施形態である除草機を示す側面図である。It is a side view which shows the weeding machine which is other embodiment of this invention.

以下、本発明の一実施形態を図面に基づいて説明する。実施形態では、手動で走行させる構成の除草機１を例に採り、説明する。図１に示す除草機１は、除草機本体７と、除草機本体７を走行させるための車輪３と、使用時に把持する操作ハンドル４と、を備えている。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the embodiment, the weeding machine 1 configured to be manually driven will be described as an example. A weeder 1 shown in FIG. 1 includes a weeder body 7, wheels 3 for running the weeder body 7, and an operation handle 4 that is gripped during use.

操作ハンドル４は、実施形態の場合、左右方向に沿って延びる把手４ａと、把手４ａから進行方向の前下方に向かって延びて先端を支持枠部８の左右両側に配置される車輪３の車軸に連結される連結部４ｂと、を備えている。そして、実施形態の除草機１は、標準的な体格の大人を使用者として設計されており、操作ハンドル４の接地面Ｇからの高さ寸法は、把手４ａを使用者の腰から胸程度の範囲内に配置させるような寸法に、設定されている。車輪３は、実施形態の場合、支持枠部８の後述する外壁部１３Ｌ，１３Ｒの左右の外方向に配置されるもので、車軸に連結される回転中心を、除草機本体７より僅かに前方に位置させるように、除草機本体７の前側半分程度の領域の側方に、配置されている。 In the case of the embodiment, the operation handle 4 includes a handle 4a extending in the left-right direction, and an axle of the wheel 3 that extends from the handle 4a toward the front lower side in the advancing direction and has a tip disposed on both the left and right sides of the support frame portion 8. And a connecting portion 4b to be connected. The weeding machine 1 according to the embodiment is designed for an adult with a standard physique as a user, and the height of the operation handle 4 from the ground contact surface G is about the level of the chest from the user's waist to the chest. The dimensions are set so as to be arranged within the range. In the case of the embodiment, the wheel 3 is arranged in the left and right outward directions of outer wall portions 13L and 13R, which will be described later, of the support frame portion 8, and the rotation center connected to the axle is slightly forward of the weeder body 7 in front. It arrange | positions in the side of the area | region of the front half of the weeder main body 7 so that it may be located in.

また、実施形態の除草機１では、除草機本体７から後方に突出して下面側を接地面Ｇに接触可能なストッパ５が、配設されている。このストッパ５を配置させることにより、使用時に、操作ハンドル４の上下によって引抜片２１の接地面Ｇとの間の間隔が増減することを防止でき、引抜片２１と接地面Ｇとの間の間隔を略一定に保つことができる。そのため、使用者が操作ハンドル４の上下の位置を略一致させるようにして、走行させなくとも、安定して引抜片２１により草を引き抜くことができて、使用者の負担を軽減させることができる。また、ストッパ５により、除草機１は、不使用時に安定して立てておくことができる。このストッパ５は、実施形態の場合、図示しない調節機構を有して、外壁部１３Ｌ，１３Ｒに対する上下の位置を調節可能とされた状態で、外壁部１３Ｌ，１３Ｒから後方に突出するように、配置されている。 Moreover, in the weeder 1 of the embodiment, the stopper 5 that protrudes rearward from the weeder body 7 and can contact the lower surface side with the grounding surface G is disposed. By disposing the stopper 5, it is possible to prevent an increase or decrease in the distance between the extracted piece 21 and the grounding surface G due to the upper and lower of the operation handle 4 during use, and the distance between the extracted piece 21 and the grounded surface G. Can be kept substantially constant. Therefore, the user can stably pull out the grass with the pull-out piece 21 without causing the user to run by making the upper and lower positions of the operation handle 4 substantially coincide with each other, thereby reducing the burden on the user. . Moreover, the weeder 1 can be stably stood by the stopper 5 when not in use. In the case of the embodiment, the stopper 5 has an adjustment mechanism (not shown) so that the vertical position relative to the outer wall portions 13L and 13R can be adjusted and protrudes rearward from the outer wall portions 13L and 13R. Has been placed.

除草機本体７は、図２，３に示すように、支持枠部８と、支持枠部８に軸支される回転除草部１７と、回転除草部１７を駆動させる駆動源としてのモータ１５と、回転除草部１７の外周側を覆うカバー２５と、草落下機構３２と、位置調節機構３６と、を備えている。 As shown in FIGS. 2 and 3, the weeder body 7 includes a support frame portion 8, a rotary weeding portion 17 that is pivotally supported by the support frame portion 8, and a motor 15 as a drive source for driving the rotary weeding portion 17 The cover 25 covering the outer peripheral side of the rotary weeding portion 17, the grass dropping mechanism 32, and the position adjusting mechanism 36 are provided.

支持枠部８は、回転除草部１７やカバー２５を保持させる保持枠９と、保持枠９の左右の側方に配置される外壁部１３Ｌ，１３Ｒと、を備えている。保持枠９は、実施形態の場合、進行方向に沿った前後両側と、下方と、を開口させるように構成されるもので、板金製として、長手方向を左右方向に略沿わせた略長方形状の天井壁１０と、天井壁１０の左右両端側から下方に延びる左側壁１１，右側壁１２と、を備えている。左側壁１１及び右側壁１２は、前後方向の中央付近における下端近傍の部位で、回転除草部１７の回転軸１８を軸支している。また、左側壁１１及び右側壁１２において、回転軸１８の配置位置の前方となる位置には、位置調節機構３６を構成する旋回軸３７を挿通可能な挿通孔１１ａ，１２ａが、形成されている。外壁部１３Ｌ，１３Ｒは、それぞれ、保持枠９における左側壁１１の左方と、右側壁１２の右方と、に配置されるもので、保持枠９の左右の側方を全面にわたって覆うとともに、上下の幅寸法を、保持枠９より大きくして、保持枠９より上下に延びるように、構成されている。実施形態の場合、外壁部１３Ｌ，１３Ｒは、保持枠９より上側に突出している部位を、上方にかけて狭幅とされる略台形状として、上端側を、操作ハンドル４における連結部４ｂの中間部位に、連結させて構成されている（図１参照）。また、実施形態の場合、保持枠９は、回転軸１８の前側において左右方向に沿って配置される旋回軸３７を、左側壁１１及び右側壁１２に形成される挿通孔１１ａ，１２ａに挿通させ、この旋回軸３７を、外壁部１３Ｌ，１３Ｒに連結させることにより、外壁部１３Ｌ，１３Ｒと連結されている。そして、保持枠９は、旋回軸３７を回転中心として、外壁部１３Ｌ，１３Ｒに対して回動可能とされており、この旋回軸３７は、位置調節機構３６を構成している。 The support frame portion 8 includes a holding frame 9 that holds the rotary weeding portion 17 and the cover 25, and outer wall portions 13 </ b> L and 13 </ b> R that are disposed on the left and right sides of the holding frame 9. In the case of the embodiment, the holding frame 9 is configured to open both the front and rear sides along the traveling direction and the lower side, and is made of sheet metal and has a substantially rectangular shape whose longitudinal direction is substantially along the left-right direction. And a left side wall 11 and a right side wall 12 that extend downward from the left and right ends of the ceiling wall 10. The left side wall 11 and the right side wall 12 support the rotation shaft 18 of the rotary weeding portion 17 at a portion near the lower end near the center in the front-rear direction. Further, in the left side wall 11 and the right side wall 12, insertion holes 11 a and 12 a into which the turning shaft 37 constituting the position adjusting mechanism 36 can be inserted are formed at positions in front of the arrangement position of the rotation shaft 18. . The outer wall portions 13L and 13R are respectively disposed on the left side of the left side wall 11 and the right side of the right side wall 12 in the holding frame 9, and cover the left and right sides of the holding frame 9 over the entire surface. The upper and lower width dimensions are made larger than the holding frame 9 so as to extend vertically from the holding frame 9. In the case of the embodiment, the outer wall portions 13L and 13R have a portion protruding upward from the holding frame 9 as a substantially trapezoidal shape that is narrowed upward, and the upper end side is an intermediate portion of the connecting portion 4b in the operation handle 4 And connected to each other (see FIG. 1). Further, in the case of the embodiment, the holding frame 9 allows the turning shaft 37 disposed along the left-right direction on the front side of the rotation shaft 18 to be inserted into the insertion holes 11 a and 12 a formed in the left side wall 11 and the right side wall 12. The swivel shaft 37 is connected to the outer wall portions 13L and 13R by being connected to the outer wall portions 13L and 13R. The holding frame 9 is rotatable with respect to the outer wall portions 13L and 13R with the turning shaft 37 as a rotation center. The turning shaft 37 constitutes a position adjusting mechanism 36.

回転除草部１７を回転させる駆動源としては、電動のモータ１５が使用されている。モータ１５は、回転軸１８を回転可能に回転軸１８に連結されるとともに、実施形態の場合、草落下機構３２を駆動させるように、草落下機構３２にも連結されている。また、実施形態の場合、モータ１５は、天井壁１０の下面側であって、回転除草部１７の直上となる位置に、固定されている（図２参照）。 An electric motor 15 is used as a drive source for rotating the rotary weeding unit 17. The motor 15 is connected to the rotary shaft 18 so that the rotary shaft 18 can rotate. In the embodiment, the motor 15 is also connected to the grass dropping mechanism 32 so as to drive the grass dropping mechanism 32. In the case of the embodiment, the motor 15 is fixed on the lower surface side of the ceiling wall 10 and at a position directly above the rotary weeding portion 17 (see FIG. 2).

回転除草部１７は、支持枠部８における保持枠９の下端近傍に配置されるもので、進行方向に対して直交するように左右方向に略沿って配置されて、両端側を、保持枠９の左側壁１１，右側壁１２に、軸支されている。この回転除草部１７は、モータ１５の駆動時に、図１，２に示すように、車輪３の回転方向に沿って、回転するように、構成されている。実施形態の場合、回転除草部１７は、モータ１５の駆動時に回転可能とされる回転軸１８と、回転軸１８に連結される除草部本体１９と、を備えている。 The rotary weeding portion 17 is disposed in the vicinity of the lower end of the holding frame 9 in the support frame portion 8 and is disposed substantially along the left-right direction so as to be orthogonal to the traveling direction. The left side wall 11 and the right side wall 12 are pivotally supported. As shown in FIGS. 1 and 2, the rotary weeding unit 17 is configured to rotate along the rotation direction of the wheel 3 when the motor 15 is driven. In the case of the embodiment, the rotary weeding unit 17 includes a rotating shaft 18 that is rotatable when the motor 15 is driven, and a weeding unit main body 19 that is connected to the rotating shaft 18.

回転軸１８は、左右方向に沿って配置されて、両端側を保持枠９の左側壁１１，右側壁１２に軸支されている。除草部本体１９は、板金製として、回転軸１８の軸方向（左右方向）に沿って、複数配置されて、それぞれ、回転軸１８に連結されている。実施形態の場合、除草部本体１９は、図３に示すように、左右方向に沿って１４個配置されている。各除草部本体１９は、略円板状の円板部２０と、円板部２０の外周縁から部分的に突出するように形成される引抜片２１と、を備えている。円板部２０は、回転軸１８の軸方向に略直交するようにして（前後及び上下に略沿うようにして）、回転軸１８に取り付けられている。実施形態の場合、円板部２０は、外径寸法を、カバー２５における下側部位２７の内径寸法より大きく設定されて、外周縁側となる周縁部位２０ａを、スリット２８を介して、下側部位２７より外方に突出させるように、構成されている（図３参照）。引抜片２１は、円板部２０の外周縁から連なりつつ、部分的に突出するように形成されるもので、実施形態の場合、外形形状を、先端側にかけて狭幅とした略台形状とされるとともに、回転軸１８の周方向（円板部２０の周方向）に沿って略放射状に、４個形成されている。引抜片２１は、詳細には、回転軸１８の回転方向の前方となる前縁２２（図２の下側に配置されている引抜片２１の後側の縁）を、先端２２ａ側を回転方向の後側に位置させ、元部２２ｂ側を回転方向の前側に位置させるように、傾斜させて、構成されている。さらに詳細には、実施形態の場合、この引抜片２１の前縁２２は、元部２２ｂ近傍の部位で、カバー２５の下側部位２７における傾斜部位２９と交差させた状態で、傾斜部位２９との交差角度を９０°程度とするように、構成されている（図６のＡ参照）。なお、実施形態では、各除草部本体１９は、引抜片２１の配置位置を側方から見て略一致させるようにして、回転軸１８に取り付けられている。 The rotating shaft 18 is disposed along the left-right direction, and both ends are pivotally supported by the left side wall 11 and the right side wall 12 of the holding frame 9. A plurality of the weeding unit main bodies 19 are made of sheet metal and are arranged along the axial direction (left-right direction) of the rotating shaft 18, and are respectively connected to the rotating shaft 18. In the case of the embodiment, as shown in FIG. 3, the 14 weeding part main bodies 19 are arranged along the left-right direction. Each weeding portion main body 19 includes a substantially disc-shaped disc portion 20 and a drawing piece 21 formed so as to partially protrude from the outer peripheral edge of the disc portion 20. The disc portion 20 is attached to the rotary shaft 18 so as to be substantially orthogonal to the axial direction of the rotary shaft 18 (so as to be substantially along the front and rear and the top and bottom). In the case of the embodiment, the disk portion 20 is configured such that the outer diameter dimension is set larger than the inner diameter dimension of the lower portion 27 in the cover 25, and the peripheral portion 20 a on the outer peripheral side is connected to the lower portion via the slit 28. 27 so as to protrude outward from the outer wall 27 (see FIG. 3). The drawn piece 21 is formed so as to partially protrude while continuing from the outer peripheral edge of the disk portion 20. In the case of the embodiment, the drawn piece 21 has a substantially trapezoidal shape with a narrow width toward the distal end side. In addition, four are formed substantially radially along the circumferential direction of the rotating shaft 18 (circumferential direction of the disk portion 20). Specifically, the drawn piece 21 has a front edge 22 (a rear edge of the drawn piece 21 arranged on the lower side in FIG. 2) that is the front in the rotational direction of the rotary shaft 18 and a tip 22a side in the rotational direction. It is made to incline so that it may be located in the rear side and the base part 22b side may be located in the front side of a rotation direction. More specifically, in the case of the embodiment, the leading edge 22 of the drawn piece 21 is a portion in the vicinity of the base portion 22b and intersects with the inclined portion 29 in the lower portion 27 of the cover 25. The crossing angle is set to about 90 ° (see A in FIG. 6). In the embodiment, each weeding portion main body 19 is attached to the rotary shaft 18 so that the arrangement position of the extraction piece 21 is substantially matched when viewed from the side.

カバー２５は、板金製とされるもので、回転除草部１７の上方を覆う上側部位２６と、回転除草部１７の下方を覆う下側部位２７と、を備えている。上側部位２６は、図２に示すように、軸方向を左右方向に略沿わせた略半円筒形状とされるもので、中心軸を回転軸１８と略一致させるようにして、回転除草部１７の上部外周側を覆うように、配置されている。この上側部位２６は、回転除草部１７の上部外周側全体を覆い可能に、内径寸法を、除草部本体１９の外形寸法、すなわち、除草部本体１９において対向する引抜片２１，２１の先端間の離隔距離よりも、大きく設定されている。また、上側部位２６は、前下端側の部位を、略円弧状に湾曲させつつ、下側部位２７との連結部位より下方に延ばして、下側部位２７の前方を覆うように、構成されている（図２参照）。この上側部位２６の前下端側の延設部２６ａは、下側部位２７の前方を略全域にわたって覆うように構成されるもので、走行時に、背丈の高い草を倒して、引抜片２１により、草を引き抜きやすくするために配置されている。 The cover 25 is made of sheet metal, and includes an upper part 26 that covers the upper side of the rotary weeding part 17 and a lower part 27 that covers the lower side of the rotary weeding part 17. As shown in FIG. 2, the upper portion 26 has a substantially semi-cylindrical shape in which the axial direction is approximately along the left-right direction, and the rotary weeding portion 17 is arranged so that the central axis substantially coincides with the rotary shaft 18. It arrange | positions so that the upper outer peripheral side of may be covered. The upper portion 26 can cover the entire upper outer peripheral side of the rotary weeding portion 17 so that the inner diameter dimension is the outer dimension of the weeding portion main body 19, that is, between the tips of the drawn pieces 21 and 21 facing each other in the weeding portion main body 19. It is set larger than the separation distance. Further, the upper part 26 is configured so as to cover the front of the lower part 27 by extending the part on the front lower end side downward from the connecting part with the lower part 27 while curving the part at the front lower end side. (See FIG. 2). The extension part 26a on the front lower end side of the upper part 26 is configured to cover the front of the lower part 27 over substantially the entire region. It is arranged to make it easier to pull out the grass.

下側部位２７は、内径寸法を、上側部位２６の内径寸法よりも小さく設定されて、軸方向を左右方向に略沿わせた略半円筒形状とされている。この下側部位２７は、各除草部本体１９に対応した位置に、略全周にわたって、除草部本体１９における引抜片２１と円板部２０の周縁部位２０ａとを下方に突出させるように挿通可能なスリット２８を、配設させて構成されている（図２，３参照）。すなわち、下側部位２７は、上述した如く、内径寸法を、円板部２０の外径寸法より小さく設定されている。そして、スリット２８は、図４に示すように、開口幅寸法を、引抜片２１及び円板部２０を円滑に回転移動可能に、引抜片２１及び円板部２０（除草部本体１９）の厚さ寸法よりも、わずかに大きく設定されている。この下側部位２７は、中心軸を回転軸１８と略一致させるようにして配置されるもので、進行方向の前端側を、水平面に略沿って前方に延ばすようにして、上側部位２６の内周面と当接されている。スリット２８は、下側部位２７におけるこの水平面に略沿って配置される部位にも、形成されている。下側部位２７の後端近傍には、後上方に延びるような傾斜部位２９が、形成されている。この傾斜部位２９は、実施形態の場合、円板部２０の接線方向（下側部位２７の接線方向）に略沿わせるようにして、水平面に対する傾斜角度を、７０°以上に設定されるもので、上側部位２６の後下端の後方まで延びて、上面側に、上側部位２６の後下端側を当接させている。スリット２８は、この傾斜部位２９の領域においても、形成されるが、引抜片２１の先端２２ａが通る領域まで形成され、引抜片２１より後方となる後側部２９ｂ（詳細には、上側部位２６の後下端側より後方となる部位）には、スリット２８は、形成されていない。 The lower portion 27 has a substantially semi-cylindrical shape in which the inner diameter dimension is set smaller than the inner diameter dimension of the upper portion 26 and the axial direction is substantially along the left-right direction. The lower portion 27 can be inserted into a position corresponding to each weeding portion main body 19 so as to project the pullout piece 21 in the weeding portion main body 19 and the peripheral portion 20a of the disc portion 20 downward substantially over the entire circumference. A slit 28 is arranged (see FIGS. 2 and 3). That is, the lower portion 27 has an inner diameter dimension set smaller than the outer diameter dimension of the disc portion 20 as described above. As shown in FIG. 4, the slit 28 has an opening width dimension such that the extracted piece 21 and the disc portion 20 (the weeding portion main body 19) can be smoothly rotated. It is set slightly larger than the size. The lower portion 27 is arranged so that the central axis thereof is substantially coincident with the rotation shaft 18, and the front end side in the traveling direction extends forward substantially along the horizontal plane so that the inner portion of the upper portion 26 is arranged. It is in contact with the peripheral surface. The slit 28 is also formed in a portion of the lower portion 27 that is disposed substantially along this horizontal plane. In the vicinity of the rear end of the lower part 27, an inclined part 29 extending rearward and upward is formed. In the case of the embodiment, the inclined portion 29 is set so as to be substantially along the tangential direction of the disc portion 20 (the tangential direction of the lower portion 27), and the inclination angle with respect to the horizontal plane is set to 70 ° or more. The rear part extends to the rear of the rear lower end of the upper part 26, and the rear lower end side of the upper part 26 is brought into contact with the upper surface side. The slit 28 is also formed in the region of the inclined portion 29, but is formed up to the region through which the tip 22a of the drawn piece 21 passes, and the rear side portion 29b behind the drawn piece 21 (specifically, the upper portion 26). The slit 28 is not formed in the rear part of the rear lower end side).

実施形態の場合、上側部位２６と下側部位２７とは、所定箇所でボルト等の締結手段により、相互に連結されており、メンテナンス時等において、下側部位２７を上側部位２６に対して取り外し可能とされている。また、上側部位２６と下側部位２７との左右の側方は、別体の蓋部材（図符号省略）により、閉塞されている。そして、実施形態の除草機１では、使用時に、各除草部本体１９に形成される引抜片２１の回転方向の前方側となる前縁２２側の部位に草を引っ掛けるようにして、草を引き抜く構成であり、引抜片２１の前縁２２側の部位に草が絡まっている場合、回転移動する引抜片２１が傾斜部位２９を通過する際に、引抜片２１の前縁２２側の部位に絡まっている草が、スリット周縁部位２９ａによって押され、引抜片２１から抜き取られるような態様となる。 In the case of the embodiment, the upper part 26 and the lower part 27 are connected to each other by fastening means such as bolts at predetermined places, and the lower part 27 is removed from the upper part 26 at the time of maintenance or the like. It is possible. The left and right sides of the upper part 26 and the lower part 27 are closed by separate lid members (not shown). And in the weeder 1 of embodiment, at the time of use, grass is pulled out so that grass may be caught on the part by the side of the front edge 22 used as the front side of the rotation direction of the extraction piece 21 formed in each weeding part main body 19. When the grass is entangled in the part on the front edge 22 side of the drawn piece 21, the drawn piece 21 that rotates and moves is tangled in the part on the front edge 22 side of the drawn piece 21 when passing through the inclined part 29. The grass is pushed by the slit peripheral portion 29 a and pulled out from the drawn piece 21.

草落下機構３２は、図２に示すように、傾斜部位２９の後端近傍に配置されている。草落下機構３２は、実施形態の場合、傾斜部位２９の下面側において傾斜部位２９に沿わせるように配置されて、傾斜部位２９に沿って前後方向に移動可能なシャッタ部材３３を備えるもので、モータ１５の駆動により前後に移動可能とされている。詳細には、草落下機構３２は、図２，３に示すように、シャッタ部材３３と、モータ１５に連結されて回転除草部１７の回転方向に沿って回転可能とされる回転軸３４と、回転軸３４に連結されてシャッタ部材３３を前後移動させる移動部材３５と、を備えている。また、シャッタ部材３３は、図示しないばねにより、常時前進移動方向側に付勢されている。移動部材３５は、回転軸３４の軸方向に略直交するようにして、回転軸３４に取り付けられるもので、外方に突出する４つの突起３５ａを、放射状に配設させている。この突起３５ａは、回転方向の前方側となる前縁側の先端近傍で、シャッタ部材３３の後端から上方に延びるように形成される突出片３３ａと、当接可能に構成されている。そして、モータ１５の駆動時に、前進移動しているシャッタ部材３３の突出片３３ａに、回転する移動部材３５の突起３５ａが当接すれば、この突起３５ａが、突出片３３ａを後方に押圧して、シャッタ部材３３を傾斜部位２９に沿うように後方移動させることとなり、移動部材３５の回転に伴って、突出片３３ａと突起３５ａとの当接状態が解除されれば、シャッタ部材３３は、図示しないばねの付勢力により、傾斜部位２９に沿うように前方移動することとなる。そして、移動部材３５の回転に伴って、シャッタ部材３３の傾斜部位２９に沿った前後移動が繰り返されることとなる。また、草落下機構３２には、シャッタ部材３３の傾斜部位２９に沿った移動をガイドする図示しないガイド部材が、配置されている。そして、実施形態では、回転軸３４の回転速度が、回転軸１８の回転速度と略同一に設定されて、草落下機構３２は、動作を回転除草部１７の回転に同期させるように、構成されており、シャッタ部材３３は、図６のＢに示すように、引抜片２１が傾斜部位２９を完全に通過した際に、前方移動して、傾斜部位２９の下面側に溜まった草を落下させ、次の引抜片２１が傾斜部位２９に到達する前に、図６のＣに示すように、後方移動して、回転移動する引抜片２１と干渉しないように、構成されている。 The grass dropping mechanism 32 is disposed in the vicinity of the rear end of the inclined portion 29 as shown in FIG. In the case of the embodiment, the grass dropping mechanism 32 includes a shutter member 33 that is arranged along the inclined portion 29 on the lower surface side of the inclined portion 29 and is movable in the front-rear direction along the inclined portion 29. It can be moved back and forth by driving the motor 15. Specifically, as shown in FIGS. 2 and 3, the grass dropping mechanism 32 includes a shutter member 33, a rotary shaft 34 that is coupled to the motor 15 and is rotatable along the rotation direction of the rotary weeding unit 17, And a moving member 35 that is connected to the rotating shaft 34 and moves the shutter member 33 back and forth. The shutter member 33 is always urged toward the forward movement direction by a spring (not shown). The moving member 35 is attached to the rotating shaft 34 so as to be substantially orthogonal to the axial direction of the rotating shaft 34, and four protrusions 35a protruding outward are arranged radially. The protrusion 35a is configured to be able to contact a protruding piece 33a formed so as to extend upward from the rear end of the shutter member 33 in the vicinity of the front edge on the front side in the rotational direction. When the motor 15 is driven, if the protrusion 35a of the rotating moving member 35 contacts the protrusion piece 33a of the shutter member 33 moving forward, the protrusion 35a presses the protrusion piece 33a backward, If the shutter member 33 is moved backward along the inclined portion 29, and the contact state between the protruding piece 33a and the protrusion 35a is released as the moving member 35 rotates, the shutter member 33 is not shown. The spring is moved forward along the inclined portion 29 by the biasing force of the spring. As the moving member 35 rotates, the back-and-forth movement along the inclined portion 29 of the shutter member 33 is repeated. The grass dropping mechanism 32 is provided with a guide member (not shown) that guides the movement of the shutter member 33 along the inclined portion 29. In the embodiment, the rotation speed of the rotation shaft 34 is set to be substantially the same as the rotation speed of the rotation shaft 18, and the grass dropping mechanism 32 is configured to synchronize the operation with the rotation of the rotary weeding unit 17. As shown in FIG. 6B, the shutter member 33 moves forward when the extracted piece 21 has completely passed through the inclined portion 29, and drops the grass accumulated on the lower surface side of the inclined portion 29. Before the next extraction piece 21 reaches the inclined portion 29, as shown in FIG. 6C, it is configured to move rearward and not interfere with the extraction piece 21 that rotates.

位置調節機構３６は、回転除草部１７及びカバー２５の支持枠部８に対しての上下方向の位置を調節するもので、実施形態の場合、回転除草部１７及びカバー２５を保持させている保持枠９ごと、外壁部１３Ｌ，１３Ｒに対して上下方向の位置を調節可能とすることにより、回転除草部１７及びカバー２５の外壁部１３Ｌ，１３Ｒに対しての上下方向の位置を調節させる構成とされている。 The position adjustment mechanism 36 adjusts the vertical position of the rotary weeding portion 17 and the cover 25 with respect to the support frame portion 8. In the case of the embodiment, the position adjusting mechanism 36 holds the rotary weeding portion 17 and the cover 25. A configuration for adjusting the vertical position of the rotary weeding portion 17 and the outer wall portions 13L and 13R of the cover 25 by adjusting the vertical position with respect to the outer wall portions 13L and 13R for each frame 9. Has been.

位置調節機構３６は、詳細には、上述した如く保持枠９を左右に貫通して左右両端側を外壁部１３Ｌ，１３Ｒに連結される旋回軸３７と、保持枠９の後側における左上側に配置されて、前方に延びるねじ棒３８ａを有した操作ハンドル３８と、ねじ棒３８ａを貫通可能とされるととともに左右方向に沿った棒状として左右両端側を外壁部１３Ｌ，１３Ｒに連結される固定軸部３９と、固定軸部３９の前側においてねじ棒３８ａに螺合可能な雌ねじ部を有するとともに左右方向に沿った棒状として左右両端側を保持枠９の左側壁１１，右側壁１２に連結される可動軸部４０と、を備えている（図２，５参照）。固定軸部３９は、操作ハンドル３８との離隔距離を一定とするように、前後に設けられたストッパ（図符号省略）によりねじ棒３８ａに対する位置を固定されつつ、周方向に回動可能に、左右両端側を外壁部１３Ｌ，１３Ｒに連結されている（図５参照）。可動軸部４０は、操作ハンドル３８の操作時に、ねじ棒３８ａに対する位置を移動可能とし、かつ、周方向に回動可能に、左右両端側を保持枠９の左側壁１１，右側壁１２に連結されている（図５参照）。 In detail, the position adjusting mechanism 36 is provided on the upper left side on the rear side of the holding frame 9 and the pivot 37 that penetrates the holding frame 9 left and right and is connected to the outer wall portions 13L and 13R on both left and right sides as described above. An operation handle 38 having a screw rod 38a extending forward and fixed so as to be able to penetrate the screw rod 38a and to be connected to the outer wall portions 13L and 13R at both left and right ends as a rod shape along the left-right direction. The shaft portion 39 has a female screw portion that can be screwed to the screw rod 38a on the front side of the fixed shaft portion 39, and is connected to the left side wall 11 and the right side wall 12 of the holding frame 9 at both right and left ends as a rod shape along the left and right direction. And a movable shaft portion 40 (see FIGS. 2 and 5). The fixed shaft portion 39 is rotatable in the circumferential direction while being fixed at a position relative to the screw rod 38a by stoppers (not shown) provided at the front and rear so that the separation distance from the operation handle 38 is constant. The left and right ends are connected to the outer wall portions 13L and 13R (see FIG. 5). The movable shaft portion 40 is movable to a position relative to the screw rod 38a when the operation handle 38 is operated, and is connected to the left side wall 11 and the right side wall 12 of the holding frame 9 so as to be rotatable in the circumferential direction. (See FIG. 5).

そして、実施形態の位置調節機構３６では、可動軸部４０を固定軸部３９から離隔させるように、操作ハンドル３８を操作すれば、可動軸部４０は、固定軸部３９から離隔するようにねじ棒３８ａを前方に向かって移動しようとするものの、可動軸部４０と旋回軸３７との離隔距離が一定であることから、図７のＡに示すように、可動軸部４０は、ねじ棒３８ａを、前端を上方に向けるように傾斜させるようにして、固定軸部３９から離隔しつつ相対的に上方移動することとなり、このとき、可動軸部４０の両端側を連結させている保持枠９全体も旋回軸３７を回転中心として回動されるように、外壁部１３Ｌ，１３Ｒに対して上方移動することとなって、引抜片２１の外壁部１３Ｌ，１３Ｒからの突出量が小さくなる。逆に、可動軸部４０を固定軸部３９に接近させるように、操作ハンドル３８を操作すれば、可動軸部４０は、図７のＢに示すように、ねじ棒３８ａを、前端を下方に向けるように傾斜させるようにして、固定軸部３９に接近しつつ相対的に下方移動することとなり、このとき、保持枠９全体も旋回軸３７を回転中心として回転移動されるように、外壁部１３Ｌ，１３Ｒに対して下方移動することとなって、引抜片２１の外壁部１３Ｌ，１３Ｒからの突出量が大きくなる。なお、この位置調節機構３６による保持枠９の外壁部１３Ｌ，１３Ｒに対する上下の移動は、回転除草部１７の上下の位置、すなわち、引抜片２１の上下の位置の調節であって、引抜片２１の外壁部１３Ｌ，１３Ｒからの突出量を調節するためのものであり、実施形態の場合、保持枠９を最上方まで移動させた状態でも、引抜片２１は、先端側を外壁部１３Ｌ，１３Ｒから下方に突出させるように構成され、また、保持枠９を最下方まで移動させた状態でも、引抜片２１のみを外壁部１３Ｌ，１３Ｒから下方に突出させ、円板部２０は突出させないように構成されている。 In the position adjusting mechanism 36 of the embodiment, if the operation handle 38 is operated so that the movable shaft portion 40 is separated from the fixed shaft portion 39, the movable shaft portion 40 is screwed so as to be separated from the fixed shaft portion 39. Although the rod 38a tries to move forward, the distance between the movable shaft portion 40 and the pivot shaft 37 is constant. Therefore, as shown in FIG. Is moved so as to be inclined so that the front end is directed upward, and the holding frame 9 is connected to both ends of the movable shaft 40 at this time. The whole moves upward with respect to the outer wall portions 13L and 13R so as to be rotated about the turning shaft 37, and the protruding amount of the extraction piece 21 from the outer wall portions 13L and 13R is reduced. Conversely, if the operation handle 38 is operated so that the movable shaft portion 40 approaches the fixed shaft portion 39, the movable shaft portion 40 moves the screw rod 38a downward with the front end thereof downward as shown in FIG. In this case, the outer wall portion is moved downward relative to the fixed shaft portion 39 while being moved toward the fixed shaft portion 39. At this time, the entire holding frame 9 is also rotationally moved around the turning shaft 37 as a rotation center. Since it moves downward with respect to 13L and 13R, the protrusion amount from the outer wall parts 13L and 13R of the drawing piece 21 becomes large. The vertical movement of the holding frame 9 with respect to the outer wall portions 13L and 13R by the position adjusting mechanism 36 is adjustment of the vertical position of the rotary weeding portion 17, that is, the vertical position of the extraction piece 21. In the case of the embodiment, even when the holding frame 9 is moved to the uppermost position, the extraction piece 21 has the distal end on the outer wall portions 13L, 13R. Further, even when the holding frame 9 is moved to the lowest position, only the extraction piece 21 is protruded downward from the outer wall portions 13L and 13R, and the disc portion 20 is not protruded. It is configured.

実施形態の除草機１は、接地面Ｇに設置させて、モータ１５を駆動させつつ、前進移動させれば、回転する除草部本体１９の各引抜片２１が、接地面Ｇを浅く掘りつつ、接地面Ｇに生えている草を引き抜くこととなり、引抜片２１により引き抜かれた草は、引抜片２１の前縁２２側に絡まっていても、引抜片２１の傾斜部位２９通過時に、スリット周縁部位２９ａによって押され、引抜片２１から抜き取られて、接地面Ｇに落下することとなる。また、モータ１５の駆動時には、草落下機構３２も、シャッタ部材３３を除草部本体１９の回転に同期させるようにして、前後移動するように動作されることから、仮に、引抜片２１から抜き取られた草が傾斜部位２９の下面側に溜まることとなっても、シャッタ部材３３により、自動的に接地面Ｇに落下することとなる。 The weeding machine 1 of the embodiment is installed on the ground surface G, and when the motor 15 is driven and moved forward, each extraction piece 21 of the rotating weeding unit main body 19 digs the ground surface G shallowly, The grass growing on the ground contact surface G is pulled out, and even if the grass pulled out by the drawing piece 21 is entangled on the front edge 22 side of the drawing piece 21, when passing through the inclined portion 29 of the drawing piece 21, the slit peripheral part It is pushed by 29 a, pulled out from the drawn piece 21, and falls onto the ground plane G. Further, when the motor 15 is driven, the grass dropping mechanism 32 is also operated to move back and forth so as to synchronize the shutter member 33 with the rotation of the weeding unit main body 19, so that it is temporarily extracted from the extraction piece 21. Even if the grass accumulates on the lower surface side of the inclined portion 29, it is automatically dropped onto the ground contact surface G by the shutter member 33.

そして、実施形態の除草機１では、回転除草部１７が、回転軸１８の軸方向（左右方向）に沿って、複数の除草部本体１９を備えており、各除草部本体１９は、回転軸１８の周方向に沿って略放射状に複数配置される引抜片２１を、備えて構成されている。そのため、実施形態の除草機１では、走行時に、左右方向に沿って複数配置される除草部本体１９を、同時に回転させ、各除草部本体１９に形成される引抜片２１の回転方向の前方側となる前縁２２に草を引っ掛けるようにして、草を引き抜くことができることから、左右に広いエリアの草を略同時に引き抜くことができ、また、各除草部本体１９には、放射状に複数の引抜片２１が形成されていることから、各除草部本体１９によって、効率よく草を引き抜くことができる。また、実施形態の除草機１では、回転除草部１７は、外周側をカバー２５により覆われており、カバー２５において回転除草部１７の下方を覆う下側部位２７には、引抜片２１を下方に突出させるスリット２８が形成されている。すなわち、実施形態の除草機１では、回転除草部１７における引抜片２１のみがスリット２８を介してカバー２５から露出される構成であり、回転軸１８は、カバー２５によって外周側を略全面にわたって覆われている。また、スリット２８は、開口幅寸法を、引抜片２１の厚さ寸法よりわずかに大きく設定されていることから、スリット２８の周縁部位と引抜片２１との間に大きな隙間が生じ難く、引き抜かれた草がこのスリット２８の部位からカバー２５内に進入することも、抑制できる。そのため、実施形態の除草機１では、走行時に、回転軸１８に草が巻きつくことを、的確に防止することができる。 And in the weeder 1 of embodiment, the rotation weeding part 17 is provided with the some weeding part main body 19 along the axial direction (left-right direction) of the rotating shaft 18, and each weeding part main body 19 is a rotating shaft. A plurality of drawn pieces 21 are arranged substantially radially along the 18 circumferential direction. Therefore, in the weeder 1 of the embodiment, during traveling, a plurality of weeding unit main bodies 19 arranged in the left-right direction are simultaneously rotated, and the front side in the rotation direction of the extraction piece 21 formed in each weeding unit main body 19. Since the grass can be pulled out by hooking the grass on the leading edge 22, the grass in a wide area on the left and right can be pulled out almost simultaneously, and each weeding section main body 19 has a plurality of radial pullouts. Since the pieces 21 are formed, the grass can be efficiently extracted by the respective weeding unit main bodies 19. Further, in the weeder 1 of the embodiment, the rotary weeding unit 17 is covered with the cover 25 on the outer peripheral side, and the extraction piece 21 is placed below the lower part 27 that covers the lower side of the rotating weeding unit 17 in the cover 25. A slit 28 is formed to project. That is, in the weeding machine 1 of the embodiment, only the extraction piece 21 in the rotary weeding unit 17 is exposed from the cover 25 through the slit 28, and the rotary shaft 18 covers the outer peripheral side over the substantially entire surface by the cover 25. It has been broken. Further, since the opening width dimension of the slit 28 is set slightly larger than the thickness dimension of the extraction piece 21, it is difficult to generate a large gap between the peripheral portion of the slit 28 and the extraction piece 21, and the slit 28 is extracted. It is also possible to prevent the grass from entering the cover 25 through the slit 28. Therefore, in the weeder 1 of the embodiment, it is possible to accurately prevent the grass from being wound around the rotary shaft 18 during traveling.

したがって、実施形態の除草機１では、効率よく除草を行うことができ、かつ、メンテナンスも容易である。 Therefore, in the weeder 1 of the embodiment, weeding can be performed efficiently and maintenance is easy.

また、実施形態の除草機１では、除草部本体１９が、回転軸１８に連結される円板部２０と、円板部２０の外周縁から部分的に突出するように形成される引抜片２１と、を備えて、円板部２０の外周縁側となる周縁部位２０ａを、スリット２８から下方に突出させるように、構成していることから、引抜片２１間の領域においても、スリット２８が、円板部２０の周縁部位２０ａによって、大部分を閉塞されるような態様となり、引き抜かれた草がスリット２８の部位からカバー２５内に進入することを、極力抑制できる。勿論、このような点を考慮しなければ、円板部として、外周縁側をスリットから突出させないような外径寸法のものを使用してもよく、さらには、除草部本体として、円板部を配置させない構成のものを使用してもよい。しかしながら、スリット２８からの草の進入を防止するためには、実施形態の如く、円板部２０の周縁部位２０ａを、スリット２８から突出させるように構成することが望ましい。 In the weeding machine 1 of the embodiment, the weeding part main body 19 is connected to the rotating shaft 18 and the extraction piece 21 is formed so as to partially protrude from the outer peripheral edge of the disk part 20. And the peripheral portion 20a on the outer peripheral side of the disc portion 20 is configured to protrude downward from the slit 28, so that the slit 28 is also formed in the region between the drawn pieces 21. The peripheral portion 20a of the disc portion 20 is configured so that the most part is closed, and it is possible to suppress the drawn grass from entering the cover 25 through the slit 28 as much as possible. Of course, if such a point is not taken into consideration, a disk part having an outer diameter that does not protrude the outer peripheral edge from the slit may be used as a disk part. You may use the thing of the structure which is not arrange | positioned. However, in order to prevent grass from entering from the slit 28, it is desirable that the peripheral portion 20a of the disk portion 20 protrudes from the slit 28 as in the embodiment.

さらに、実施形態の除草機１では、下側部位２７の後端近傍に、後上方に延びるような傾斜部位２９を、配置させ、引抜片２１において、回転方向の前方側となる前縁２２を、先端２２ａ側を回転方向の後側に位置させ、元部２２ｂ側を回転方向の前側に位置させるように、傾斜させている。すなわち、実施形態の除草機１では、カバー２５の下側部位２７に形成される傾斜部位２９の前側に位置した状態において、引抜片２１の回転方向側の前縁２２は、元部２２ｂ側を傾斜部位２９側に位置させるように傾斜している。そのため、回転除草部１７の回転時に、引抜片２１の前縁２２側の部位は、下側部位２７の後端近傍において後上がりに傾斜して配置される傾斜部位２９に配置されるスリット２８の部位に、元部２２ｂ側から、順次挿通されるようにして、カバー２５内に進入することとなる。そして、引抜片２１がこの傾斜部位２９に配置されるスリット２８の部位に挿通される際に、この傾斜部位２９におけるスリット周縁部位２９ａによって、引抜片２１の前縁２２側に絡まっている草を押えられ、引抜片２１が、元部２２ｂ側から、順次草を抜き取られるような態様となって、引抜片２１から抜き取られた草が、下方に落下することとなる。そのため、実施形態の除草機１では、走行時に、引抜片２１の前縁２２側の部位によって引き抜かれた草を、自動的に、引抜片２１から抜き取って下方の接地面に落下させることができる。 Furthermore, in the weeder 1 of the embodiment, an inclined portion 29 that extends rearward and upward is disposed in the vicinity of the rear end of the lower portion 27, and the leading edge 22 that is the front side in the rotation direction is provided on the drawn piece 21. The tip 22a is inclined to the rear side in the rotational direction, and the base 22b side is located to the front side in the rotational direction. That is, in the weeder 1 of the embodiment, the front edge 22 on the rotational direction side of the extraction piece 21 is located on the base portion 22b side in a state of being positioned on the front side of the inclined portion 29 formed on the lower portion 27 of the cover 25. It inclines so that it may be located in the inclination site | part 29 side. Therefore, when the rotary weeding portion 17 is rotated, the portion on the front edge 22 side of the drawn piece 21 is formed by the slit 28 disposed in the inclined portion 29 that is inclined to rise rearward in the vicinity of the rear end of the lower portion 27. The parts enter the cover 25 in such a manner that the parts are sequentially inserted from the base 22b side. Then, when the drawn piece 21 is inserted into the portion of the slit 28 arranged in the inclined portion 29, the grass entangled on the front edge 22 side of the drawn piece 21 by the slit peripheral portion 29a in the inclined portion 29 is removed. The pulled-out pieces 21 are pressed, and the grass is sequentially extracted from the base portion 22b side, and the grass extracted from the extracted pieces 21 falls downward. Therefore, in the weeder 1 of the embodiment, during running, the grass extracted by the portion on the front edge 22 side of the extraction piece 21 can be automatically extracted from the extraction piece 21 and dropped onto the ground contact surface below. .

特に、実施形態の除草機では、傾斜部位２９の傾斜状態と、引抜片２１の前縁２２の傾斜状態と、が、引抜片２１の前縁２２を、元部２２ｂ近傍の部位で、傾斜部位２９と交差させた状態で、前縁２２と傾斜部位２９との交差角度を９０°程度とするように、設定されている。そのため、引抜片２１の前縁２２側に絡まっている草を、適度な押圧力で押えることができて、引抜片２１の通過時に、スリット周縁部位２９ａによって、引抜片２１から円滑に草を抜き取ることができる。例えば、前縁２２と傾斜部位２９との交差角度が小さすぎれば、引抜片２１が傾斜部位２９に到達した際に、スリット周縁部位２９ａによる押圧力が大きすぎて、多量の草が引抜片２１の前縁２２側に絡まっている場合に、引抜片２１から草を抜き取れない場合が生じ、逆に、前縁２２と傾斜部位２９との交差角度が大きすぎては、引抜片２１が傾斜部位２９に到達した際に、スリット周縁部位２９ａによる押圧力が小さすぎて、引抜片２１から草を抜き取れない場合が生じるためである。 In particular, in the weeding machine of the embodiment, the inclined state of the inclined portion 29 and the inclined state of the front edge 22 of the extracted piece 21 are such that the front edge 22 of the extracted piece 21 is an inclined portion in the vicinity of the base portion 22b. The crossing angle between the leading edge 22 and the inclined portion 29 is set to about 90 ° in a state where the crossing point 29 is crossed. Therefore, the grass entangled on the front edge 22 side of the extracted piece 21 can be pressed with an appropriate pressing force, and the grass is smoothly extracted from the extracted piece 21 by the slit peripheral portion 29a when the extracted piece 21 passes. be able to. For example, if the intersecting angle between the leading edge 22 and the inclined portion 29 is too small, when the extraction piece 21 reaches the inclination portion 29, the pressing force by the slit peripheral portion 29a is too large, and a large amount of grass is extracted. When the front edge 22 is entangled, the grass may not be extracted from the drawn piece 21. Conversely, if the intersection angle between the front edge 22 and the inclined portion 29 is too large, the drawn piece 21 is inclined. This is because, when reaching the part 29, the pressing force by the slit peripheral part 29a is too small, and the grass may not be extracted from the drawn piece 21.

さらにまた、実施形態の除草機１では、傾斜部位２９の後端近傍に、駆動源としてのモータ１５により、傾斜部位２９の下面側に溜まった草を落下させるように駆動可能な草落下機構３２を配設させていることから、仮に、引き抜いた草が、落下せず、傾斜部位２９の下面側に溜まることとなっても、この溜まった草を、草落下機構３２によって落下させることができる。勿論、このような点を考慮しなければ、除草機に、草落下機構を配設させない構成としてもよい。 Furthermore, in the weeder 1 of the embodiment, the grass dropping mechanism 32 that can be driven to drop the grass accumulated on the lower surface side of the inclined portion 29 by the motor 15 as a driving source near the rear end of the inclined portion 29. Therefore, even if the extracted grass does not fall and accumulates on the lower surface side of the inclined portion 29, the accumulated grass can be dropped by the grass dropping mechanism 32. . Of course, if this point is not taken into consideration, the weeding machine may be configured such that the grass dropping mechanism is not provided.

さらにまた、実施形態の除草機１では、回転除草部１７及びカバー２５を支持枠部８に対して上下方向の位置を調節可能な位置調節機構３６を、配設させていることから、草の生え方や、地面の状態に応じて、回転除草部１７、すなわち、引抜片２１の上下の位置を微調節することが可能となる。詳細には、実施形態の場合、位置調節機構３６により、引抜片２１の外壁部１３Ｌ，１３Ｒからの突出量を調節可能としている。勿論、このような点を考慮しなければ、除草機に、位置調節機構を配設させない構成としてもよい。 Furthermore, in the weeding machine 1 of the embodiment, the rotary weeding unit 17 and the cover 25 are provided with the position adjusting mechanism 36 that can adjust the vertical position of the cover 25 with respect to the support frame unit 8. It is possible to finely adjust the vertical position of the rotary weeding unit 17, that is, the extraction piece 21, according to the way of growing and the state of the ground. Specifically, in the case of the embodiment, the position adjustment mechanism 36 can adjust the protruding amount of the extraction piece 21 from the outer wall portions 13L and 13R. Of course, if this point is not taken into consideration, the weeding machine may be configured such that the position adjusting mechanism is not provided.

なお、実施形態では、車輪をモータに連結させず、手動で前進移動させる構成の除草機を例に採り説明しているが、本発明を適用可能な除草機は、これに限られるものではなく、例えば、実施形態の除草機の車輪をモータに連結させて、モータを用いて車輪を駆動させるような半自走式としてもよく、さらには、図８に示すように、別途自走手段を有する自走式の除草機１Ａにも、本発明の除草機を適用できる。 In the embodiment, a weeder having a configuration in which a wheel is manually moved forward without being connected to a motor is described as an example. However, a weeder to which the present invention is applicable is not limited thereto. For example, the wheel of the weeder according to the embodiment may be connected to a motor, and may be a semi-self-propelled type in which the wheel is driven using the motor. Further, as shown in FIG. The weeding machine of the present invention can also be applied to the self-propelled weeding machine 1A.

１，１Ａ…除草機、３…車輪、８…支持枠部、１５…モータ（駆動源）、１７…回転除草部、１８…回転軸、１９…除草部本体、２０…円板部、２０ａ…周縁部位、２１…引抜片、２２…前縁、２２ａ…先端、２２ｂ…元部、２５…カバー、２６…上側部位、２７…下側部位、２８…スリット、２９…傾斜部位、２９ａ…スリット周縁部位、３２…草落下機構、３６…位置調節機構、Ｇ…接地面 DESCRIPTION OF SYMBOLS 1,1A ... Weeding machine, 3 ... Wheel, 8 ... Support frame part, 15 ... Motor (drive source), 17 ... Rotary weeding part, 18 ... Rotating shaft, 19 ... Weeding part main body, 20 ... Disc part, 20a ... Peripheral part, 21 ... extracted piece, 22 ... front edge, 22a ... tip, 22b ... original part, 25 ... cover, 26 ... upper part, 27 ... lower part, 28 ... slit, 29 ... inclined part, 29a ... slit periphery Part, 32 ... Grass dropping mechanism, 36 ... Position adjusting mechanism, G ... Grounding surface

Claims

A weeder that has wheels and can be driven manually or automatically,
A region of at least the lower side on both the front and rear sides along the traveling direction, and a lower portion, and a support frame portion in which the wheels are arranged on both the left and right sides;
In the vicinity of the lower end of the support frame portion, it is disposed so as to be close to the ground plane, and is disposed substantially along the left-right direction so as to be orthogonal to the traveling direction, with both end sides facing the support frame portion side. A rotary weeding portion that is pivotally supported and is rotatable along the rotational direction of the wheel by a drive source;
A cover arranged to cover the outer peripheral side of the rotating weeding portion;
It is set as the composition provided with,
The rotary weeding unit is a rotating shaft that can be rotated when the drive source is driven, and a weeding unit that is made of sheet metal and is arranged along the axial direction of the rotating shaft and is connected to the rotating shaft. A main body,
Each of the weeding portion main bodies is arranged in a plurality of substantially radially along the circumferential direction of the rotating shaft, and has a drawing piece that can draw out the grass when the rotating shaft rotates,
The cover has an upper part that covers the upper side of the rotating weeding part and a lower part that covers the lower part of the rotating weeding part. The part is configured by arranging a slit that can protrude downward,
The weeding machine, wherein the slit has an opening width dimension set slightly larger than a thickness dimension of the drawn piece.

The weeding portion main body is configured to include a disc portion connected to the rotating shaft, and the extraction piece formed so as to partially protrude from the outer peripheral edge of the disc portion,
2. The weeding machine according to claim 1, wherein the disk portion is configured to project a portion on an outer peripheral edge side downward from the slit.

The lower part is configured to have an inclined part formed to extend rearward and upward in the vicinity of the rear end,
The extracted piece is configured to be inclined such that the front edge on the front side in the rotational direction is positioned such that the tip side is located on the rear side in the rotational direction and the base part side is located on the front side in the rotational direction. A weeder according to claim 1 or 2.

The grass dropping mechanism that can be driven by the driving source so as to drop grass accumulated on the lower surface side of the inclined portion is disposed near the rear end of the inclined portion. The weeding machine described in 1.

The position adjustment mechanism which can adjust the position of the said rotation weeding part and the said cover to an up-down direction with respect to the said support frame part is arrange | positioned, The any one of Claim 1 thru | or 4 characterized by the above-mentioned. The weeding machine described.