JP2002142527A - Mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mower designed to prevent grass from being left uncut by a plurality of rotary cutting blades arranged in parallel left and right. SOLUTION: This mower has such a construction that a plurality of rotary cutting blades 50a, 50b and 50c arranged in parallel left and right are covered with a deck 27 as the covering body over the range from the above to both sides thereof, an outer peripheral wall 54 is set at an outer peripheral part a specified gap apart from the respective tip loci of these blades 50a, 50b and 50c, the front side wall portion 54a of the outer peripheral wall 54 is made arc-fashion so as to run along the front outer periphery of these blades 50a, 50b and 50c, and the ends of the front side wall portion 54a are joined to each other to make joined constrictive parts 56, which are each provided with a dispersive device 61 constituted of a rhombic plate body 61a or triangular plate body 61b when viewed from the bottom. In the mower having the above construction works, lawn grass tending to gather at the rhombic or triangular plate bodies 61a or 61b is dispersed left and right and the lawn grass run through the lower end rims of the front side wall portion 54a is sent so as to go toward the respective rotational centers of the cutting blades 50a and 50c and thus cut favorably.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】この発明は、草刈機の改良に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a mower.

【０００２】[0002]

【従来技術】複数の回転刈刃を左右方向に並列配置し、
これらの複数の回転刈刃の上方と側方をカバー体である
デッキで被覆して草刈機を構成し、この草刈機を移動車
両に昇降自在に取り付け、これらの回転刈刃の先端軌跡
から所定間隔開けた外周部に外周壁を設けたものがあ
る。この外周壁の前側壁部を複数の回転刈刃の前部外周
部に接近させて沿わせて円弧状とし、回転刈刃で切断し
た芝草を円弧状の外周壁に沿って良好に排出させるもの
がある。2. Description of the Related Art A plurality of rotary cutting blades are arranged in parallel in the left-right direction,
A mower is constructed by covering the upper side and the side of the plurality of rotary cutting blades with a deck as a cover body, and the mowing machine is mounted on a moving vehicle so as to be able to move up and down. In some cases, an outer peripheral wall is provided at an outer peripheral portion spaced apart. The front wall portion of the outer peripheral wall is formed in an arc shape by approaching to the front outer peripheral portions of the plurality of rotary cutting blades, and turfgrass cut by the rotary cutting blade is discharged well along the arc-shaped outer peripheral wall. There is.

【０００３】[0003]

【発明が解決しようとする問題点】外周壁の前側壁部を
複数の回転刈刃の前部外周部に接近させて沿わせて円弧
状とし、回転刈刃で切断した芝草を円弧状の外周壁に沿
って良好に排出させるものにあっては、複数の円弧状の
前側壁部が接続されて接続狭窄部が構成されこととな
る。すると、この接続狭窄部の後部三角形状部分には芝
草が集まり、集まった芝草が一挙に接続狭窄部の下方を
潜り外周壁の内側に侵入し、回転刈刃により十分に切断
できず刈り残しが生じるという不具合が発生していた。SUMMARY OF THE INVENTION A front wall portion of an outer peripheral wall is formed in an arc shape by approaching a front outer peripheral portion of a plurality of rotary cutting blades, and turfgrass cut by the rotary cutting blade is formed in an arc-shaped outer peripheral portion. In the case of discharging well along the wall, a plurality of arc-shaped front side walls are connected to form a connection narrowing portion. Then, turfgrass gathers in the rear triangular portion of the connection narrowing portion, and the gathered turfgrass rushes under the connection narrowing portion and intrudes into the outer peripheral wall, and cannot be cut sufficiently by the rotary cutting blade, so that the remaining mowing remains. The problem that it occurred.

【０００４】このような不具合を解消するために、草刈
機の直進走行時における複数の回転刈刃の先端部相互間
のオーバーラップ代を大きくする方法もあるが、移動車
両の旋回刈取時には、回転刈刃の先端部相互の間隙部に
芝草が集まりがちとなり、刈り残しが解消しないのが実
状である。[0004] In order to solve such a problem, there is a method of increasing the overlap margin between the tips of a plurality of rotary cutting blades when the mower is traveling straight, but when the moving vehicle turns and cuts, the overlap margin is increased. In fact, turfgrass tends to collect in the gaps between the tips of the cutting blades, and the uncut residue is not eliminated.

【０００５】そこで、この発明はこのような不具合を解
消しようとするものである。Accordingly, the present invention is to solve such a problem.

【０００６】[0006]

【問題を解決するための手段】このような技術的課題を
解決するために、この発明は次のように構成した。請求
項１の発明は、左右方向に並列配置している複数の回転
刈刃５０ａ，５０ｂ，５０ｃの上方と側方をカバー体で
あるデッキ２７で被覆して草刈機２を構成し、この草刈
機２を移動車両１に昇降自在に取り付け、これらの回転
刈刃５０ａ，５０ｂ，５０ｃの先端軌跡から所定間隔開
けた外周部に外周壁５４を設け、外周壁５４の前側壁部
５４ａを、前記回転刈刃５０ａ，５０ｂ，５０ｃの前部
外周部に沿うように円弧状としその端部を互いに接続し
て接続狭窄部５６とし、前記接続狭窄部５６には分散装
置６１を設けたことを特徴とし、請求項２の発明は、互
いに反対方向に回転する回転刈刃５０ａと回転刈刃５０
ｃの外周部に沿う前側壁部５４ａ，５４ａを接続した接
続狭窄部５６には、底面視菱形板体６１ａからなる分散
装置６１を設けたことを特徴とし、請求項３の発明は、
同じ方向に回転する回転刈刃５０ａと回転刈刃５０ｂの
外周部に沿う前側壁部５４ａ，５４ａを接続した接続狭
窄部５６には、底面視で三角形状板体６１ｂで構成した
分散装置６１を設けたことを特徴とする。Means for Solving the Problems In order to solve such technical problems, the present invention is configured as follows. According to the first aspect of the present invention, the mowing machine 2 is constituted by covering the upper side and the side of a plurality of rotary cutting blades 50a, 50b, 50c arranged in parallel in the left-right direction with a deck 27 as a cover body. The machine 2 is attached to the moving vehicle 1 so as to be able to move up and down, and an outer peripheral wall 54 is provided at an outer peripheral portion spaced a predetermined distance from the tip trajectory of the rotary cutting blades 50a, 50b, 50c. The rotary cutting blades 50a, 50b, and 50c are formed in an arc shape so as to extend along the outer peripheral portion of the front part, and the ends thereof are connected to each other to form a connection narrowing portion 56, and the connection narrowing portion 56 is provided with a dispersion device 61. The rotary cutting blade 50a and the rotary cutting blade 50 that rotate in opposite directions to each other.
The connection narrowing portion 56 connecting the front side wall portions 54a, 54a along the outer peripheral portion c is provided with a dispersion device 61 composed of a rhombic plate body 61a when viewed from the bottom.
A dispersing device 61 formed of a triangular plate 61b in bottom view is connected to a connection narrowing portion 56 connecting the front side wall portions 54a, 54a along the outer periphery of the rotary cutting blade 50a and the rotary cutting blade 50b rotating in the same direction. It is characterized by having been provided.

【０００７】[0007]

【発明の作用及び効果】この発明は、外周壁５４の前側
壁部５４ａを、回転刈刃５０ａ，５０ｂ，５０ｃの前部
外周部に沿うように円弧状としその端部を互いに接続し
て接続狭窄部５６とし、この接続狭窄部５６には分散装
置６１を設けたので、接続狭窄部５６に集まりがちな芝
草を左右方向に分散させながら前側壁部５４ａの下端縁
を潜って内部に進入させることができて、回転刈刃５０
ａ，５０ｂ，５０ｃの先端間隙部への芝草のまとまった
流れを少なくし、刈り残しを少なくすることができる。According to the present invention, the front wall portion 54a of the outer peripheral wall 54 is formed in an arc shape so as to follow the front outer peripheral portions of the rotary cutting blades 50a, 50b, 50c, and their ends are connected to each other. Since the dispersing device 61 is provided in the constricted portion 56, the turfgrass, which tends to gather in the constricted portion 56, is dispersed in the left-right direction and enters the inside through the lower edge of the front wall portion 54a. Can rotate the blade 50
The integrated flow of the turfgrass to the gaps between the tips a, 50b, and 50c can be reduced, and the uncut portion can be reduced.

【０００８】また、互いに反対方向に回転する回転刈刃
５０ａと回転刈刃５０ｃの外周部に沿う前側壁部５４
ａ，５４ａを接続した接続狭窄部５６には、底面視菱形
板体６１ａを設けたので、接続狭窄部５６に集まりがち
な芝草を菱形板体６１ａの先端部で左右に分散させて回
転刈刃５０ａと回転刈刃５０ｃの先端間隙部へのまとま
った流れを少なくしながら、前側壁部５４ａの下端縁を
潜った芝草を回転刈刃５０ａ，回転刈刃５０ｃの回転中
心に向かうように送り込むことができて、芝草を良好に
切断することができる。A front wall portion 54 along the outer periphery of the rotating blades 50a and 50c rotating in opposite directions.
Since the connection narrowing portion 56 connecting the a and 54a is provided with the rhombic plate 61a when viewed from the bottom, the lawn grass which tends to gather in the connection narrowing portion 56 is dispersed right and left at the tip of the rhombic plate 61a. Feeding the turfgrass that dives under the lower edge of the front side wall portion 54a toward the rotation center of the rotary cutting blades 50a and 50c while reducing the flow of the coherent flow into the gap between the tip of the rotary cutting blade 50a and the rotary cutting blade 50c. Turfgrass can be cut well.

【０００９】また、同じ方向に回転する回転刈刃５０ａ
と回転刈刃５０ｂの外周部に沿う前側壁部５４ａ，５４
ａを接続した接続狭窄部５６には、底面視で三角形状板
体６１ｂを設けたので、接続狭窄部５６に集まる芝草を
左右に分散させて回転刈刃５０ａと回転刈刃５０ｂの先
端間隙部へのまとまった流れを少なくしながら、、前側
壁部５４ａ，５４ｂの下方を潜った芝草を夫れ夫れ回転
刈刃５０ａ，５０ｂの回転中心に向かうように送り込む
ことができて、良好に切断し刈り残しを防止することが
できる。A rotary cutting blade 50a that rotates in the same direction.
And front wall portions 54a, 54 along the outer peripheral portion of the rotary blade 50b.
Since the connection narrowing portion 56 connected to a is provided with the triangular plate body 61b when viewed from the bottom, the turfgrass gathered at the connection narrowing portion 56 is dispersed right and left so that the tip gap between the rotary cutting blade 50a and the rotary cutting blade 50b. The turfgrass that dives below the front side wall portions 54a and 54b can be sent toward the rotation center of the rotary cutting blades 50a and 50b, respectively, while reducing the flow of the turf, so that the cutting can be performed well. It is possible to prevent uncut leaves.

【００１０】[0010]

【発明の実施の形態】以下、本発明の実施例の形態につ
いて説明する。トラクタ等の移動車両１の前後中間下部
に芝や草類を地表面から刈り取る草刈機２を昇降自在に
取り付け、この作業機である草刈機２の草刈り部にこの
発明を折り込んだものであって、以下これにつき説明す
る。Embodiments of the present invention will be described below. A mowing machine 2 for mowing grass and grass from the ground surface is attached to the lower front and rear middle of a moving vehicle 1 such as a tractor so as to be able to move up and down, and the present invention is folded into a mowing section of the mowing machine 2 which is the working machine. This will be described below.

【００１１】移動車両１は図示のように乗用四輪型のト
ラクタであり、機体下部に左右一対の前後方向の主フレ
ーム３，３を配設している。主フレーム３，３は前後方
向中間部で機体に溶接されていて、後主フレーム３ａ，
３ａを左・右後輪４，４の内側面に接近するように左右
間隔を幅広に構成している。The mobile vehicle 1 is a riding four-wheel type tractor as shown in the figure, and has a pair of left and right main frames 3 and 3 arranged in the lower part of the body. The main frames 3, 3 are welded to the fuselage at the middle part in the front-rear direction, and the rear main frames 3a,
The left and right rear wheels 3 and 4 are configured to have a wide left-right space so as to approach the inner surfaces of the left and right rear wheels 4 and 4.

【００１２】主フレーム３，３は前側部を幅狭に構成
し、前部上方にエンジン５を搭載している。主フレーム
３，３の前側下部にフロントアクスル６をセンターピポ
ット回りに左右揺動自在に取り付け、このフロントアク
スル６の両端部にキングピン７を介して左・右前輪８，
８を操舵自在に取り付けていて、ステアリングハンドル
９により左・右前輪８，８を操舵する。また、左右の後
主フレーム３ａ，３ａ間には左右の後車軸１０，１０を
軸架したリヤーアクスル１１、及び、走行用伝動ケース
１２が取り付けられている。そして、左右の後車軸１
０，１０の両端部に左・右後輪４，４を取り付けてい
る。The main frames 3 and 3 have a narrow front side, and have an engine 5 mounted above the front. A front axle 6 is attached to the front lower part of the main frames 3 and 3 so as to swing left and right around a center pivot, and left and right front wheels 8 and
The steering wheel 9 is used to steer the left and right front wheels 8, 8. A rear axle 11 having left and right rear axles 10 and 10 mounted thereon and a traveling transmission case 12 are mounted between the left and right rear main frames 3a and 3a. And left and right rear axle 1
Left and right rear wheels 4 and 4 are attached to both ends of 0 and 10, respectively.

【００１３】主フレーム３，３の前端部にサイドステー
１３を連結し、後主フレーム３ａ，３ａの後端部に断面
死角状の左右の支柱１４，１４を上下方向に直立状に固
着している。支柱１４，１４の上部と後主フレーム３
ａ，３ａとの間には、図４に示すように、補強枠体１
５，１５を連結し、強度のアップと整備性の向上を図っ
ている。A side stay 13 is connected to the front ends of the main frames 3 and 3, and right and left columns 14, 14 each having a blind spot in cross section are fixed to the rear ends of the rear main frames 3a, 3a in an upright manner in the vertical direction. I have. The upper part of the pillars 14 and the rear main frame 3
a, 3a, as shown in FIG.
5, 15 are connected to improve strength and maintainability.

【００１４】エンジン５の外周部をボンネット１６やサ
イドカバー１７で被覆し、ボンネット１６の後部上方に
前記ステアリングハンドル９を配置している。左・右後
輪４，４間の上方には座席１８付きのフェンダ１９を配
置し、フェンダ１９の前縁部と前記サイドカバー１７と
の空間部に、主フレーム３，３及び後主フレーム３ａ，
３ａを接近して覆うようにステップ２０を設けている。An outer peripheral portion of the engine 5 is covered with a hood 16 and a side cover 17, and the steering handle 9 is disposed above a rear portion of the hood 16. A fender 19 with a seat 18 is disposed above the left and right rear wheels 4 and 4, and a main frame 3 and a rear main frame 3a are provided in a space between a front edge of the fender 19 and the side cover 17. ,
Step 20 is provided so as to approach and cover 3a.

【００１５】次に、図３に基づき動力伝動系について説
明する。エンジン５はクランク軸を後下がりに前後方向
に沿わせて配置し、エンジン５の前部には前方に突出し
た取出軸を設けて駆動プーリ２１を取り付け、後部には
に走行用の第１ＰＴＯ軸２２を設けている。また、フロ
ントアクスル６の左右中間部を軸支するセンターピポッ
ト軸２３の軸心方向を前記クランク軸と平行状態とし、
センターピポット軸２３の前端部に従動プーリ２４を取
り付け、その後端部を作業機駆動用の第２ＰＴＯ軸２５
として、後方に向けて突出している。駆動プーリ２１と
従動プーリ２４との間にベルト等の回転伝達具２６を巻
き掛け、クラッチ（図示省略）を介して第２ＰＴＯ軸２
５の回転を入／切操作している。Next, a power transmission system will be described with reference to FIG. The engine 5 has a crankshaft arranged rearward and downward in the front-rear direction, a take-out shaft protruding forward is provided at the front of the engine 5, and a drive pulley 21 is attached to the engine 5, and a first PTO shaft for traveling is provided at the rear. 22 are provided. In addition, the center axis direction of a center pivot shaft 23 that supports the left and right intermediate portion of the front axle 6 is set in a state parallel to the crankshaft,
A driven pulley 24 is attached to a front end of the center pivot shaft 23, and a rear end of the driven pulley 24 is a second PTO shaft 25 for driving a working machine.
And protrudes rearward. A rotation transmission tool 26 such as a belt is wound between the driving pulley 21 and the driven pulley 24, and the second PTO shaft 2 is connected via a clutch (not shown).
5 rotation on / off operation.

【００１６】草刈機２におけるデッキ２７の中央部上方
に設けられている作業伝動ケース２８の作業入力軸２９
と、前記第２ＰＴＯ軸２５との間を自在継手３０を介し
て伝動している。機体には左右の前・後昇降リンク３
１，３１の前端を軸支して、前・後昇降リンク３１，３
１の後端に前記草刈機２のデッキ２７に軸支し、後昇降
リンク３１の一方をリフトアーム３２とリフトリンク３
３により支持し、昇降用アクチュエータである油圧シリ
ンダ３４の伸縮により草刈機２を昇降操作する構成であ
る。草刈機２の前後には、下降接地時のデッキ２７の高
さを調節するゲージ車輪３５，３５が首振り自在に左右
一対設けられている。The work input shaft 29 of the work transmission case 28 provided above the center of the deck 27 of the mower 2
And the second PTO shaft 25 via a universal joint 30. Left and right front / rear lifting links 3
The front end of the front and rear elevating links 31 and 3
1 is supported at the rear end by a deck 27 of the mower 2, and one of the rear elevating links 31 is connected to a lift arm 32 and a lift link 3.
The mower 2 is supported by the hydraulic cylinder 34 as an actuator for raising and lowering. A pair of left and right gauge wheels 35, 35 for adjusting the height of the deck 27 when descending and touching the ground, are provided in front of and behind the mower 2.

【００１７】次に、第１ＰＴＯ軸２２からの左・右後輪
４，４の駆動構成について説明する。後主フレーム３
ａ，３ａの内側には走行用伝動ケース１２を右側にオフ
セットして取り付けている。走行用伝動ケース１２の前
側にはポンプとモータからなる静油圧動力駆動伝動装置
である所謂ＨＳＴ装置を内装したＨＳＴケース３６を取
り付けている。ＨＳＴケース３６の上部には前方に向か
って走行用入力軸３７を軸架し、エンジン５から後方に
向けて突出している第１ＰＴＯ軸２２から走行用自在継
手３０ａを介して走行用入力軸３７に動力が伝達され
る。この走行用入力軸３７でポンプを駆動し、斜板の調
節によりモータを所定の回転数に変速出力して、走行用
伝動ケース１２内の各種歯車群に伝動し、前後進や高低
速の変速をして、左・右後輪４，４に伝達し走行する構
成である。Next, the drive configuration of the left and right rear wheels 4, 4 from the first PTO shaft 22 will be described. Rear main frame 3
A traveling transmission case 12 is mounted on the inner side of a and 3a, offset to the right. An HST case 36 in which a so-called HST device, which is a hydrostatic power drive transmission device including a pump and a motor, is mounted on the front side of the traveling transmission case 12. An input shaft 37 for traveling is mounted on the upper part of the HST case 36 toward the front. The input shaft 37 for traveling is extended from the first PTO shaft 22 projecting rearward from the engine 5 to the input shaft 37 for traveling via the universal joint 30a for traveling. Power is transmitted. The pump is driven by the traveling input shaft 37, the motor is shifted to a predetermined rotational speed by adjusting the swash plate, transmitted to various gear groups in the traveling transmission case 12, and moved forward and backward or at high or low speed. Then, the vehicle is transmitted to the left and right rear wheels 4 and 4 to travel.

【００１８】左右支柱１４，１４の間にはブロワ３８を
内装したブロワケース３９を取り付け、ブロワケース３
９におけるブロワ３８前方に対向する前壁部から前方に
向けて吸気筒４０を斜め下方に設けている。吸気筒４０
の前端の吸気口４０ａは正面視幅広の四角形状に開口し
ていて、草刈機２のデッキ２７の後部から断面幅広の四
角形状のシュータ４１を後方に向けて突出して設け、シ
ュータ４１の後端部を吸気筒４０の吸気口４０ａに接続
している。このシュータ４１の前端はデッキ２７の後部
にヒンジ４２を介して上下回動自在に取り付け、デッキ
２７の昇降に伴いシュータ４１も昇降する。A blower case 39 containing a blower 38 is mounted between the left and right supports 14, 14, and the blower case 3 is provided.
An intake cylinder 40 is provided obliquely downward from the front wall facing the front of the blower 38 in FIG. Intake cylinder 40
Is open in a square shape having a wide width in front view, and a square-shaped shooter 41 having a wide cross section is provided to protrude rearward from a rear portion of the deck 27 of the mowing machine 2, and a rear end of the shooter 41 is provided. The portion is connected to the intake port 40 a of the intake cylinder 40. The front end of this shooter 41 is attached to the rear of the deck 27 via a hinge 42 so as to be freely rotatable up and down. As the deck 27 moves up and down, the shooter 41 also moves up and down.

【００１９】ブロワケース３９の上部には搬送筒４３を
上方に向けて取り付け、搬送筒４３の先端を収納容器で
あるコレクタ４４の上部に連通している。ブロワケース
３９の後壁面には、ブロワ３８駆動用の伝動装置を覆う
カバーケース４５を取り付けている。カバーケース４５
内には、プーリ，ベルトからなる伝動装置を内装し、ブ
ロワケース３９の上部からブロワ入力軸４６を前方に向
けて突出するように軸架し、走行用伝動ケース１２の後
上部から後方に向けてブロワ駆動軸４７を軸架し、ブロ
ワ駆動軸４７とブロワ入力軸４６との間をブロワ用自在
継手３０ｂを介して伝動している。しかして、ブロワ３
８の回転により吸気筒４０内は負圧となり、シュータ４
１も負圧になり、デッキ２７内の刈り取った芝草をブロ
ワ３８により吸引し、搬送筒４３からコレクタ４４へ搬
送する。コレクタ４４に収納された芝草が満杯になる
と、蓋体４８を開け所定の場所に排出する。A transfer cylinder 43 is attached to the upper part of the blower case 39 so as to face upward, and the leading end of the transfer cylinder 43 communicates with the upper part of a collector 44 which is a storage container. A cover case 45 that covers the transmission for driving the blower 38 is attached to the rear wall surface of the blower case 39. Cover case 45
Inside, a transmission device including a pulley and a belt is provided, and a blower input shaft 46 is suspended from an upper portion of the blower case 39 so as to protrude forward. The blower drive shaft 47 is supported by a shaft, and power is transmitted between the blower drive shaft 47 and the blower input shaft 46 via the blower universal joint 30b. And blower 3
The negative pressure is generated in the intake cylinder 40 by the rotation of the
1 also becomes a negative pressure, and the lawn grass cut off in the deck 27 is sucked by the blower 38 and transported from the transport cylinder 43 to the collector 44. When the grass stored in the collector 44 is full, the lid 48 is opened and discharged to a predetermined place.

【００２０】次に、草刈機２について説明する。主フレ
ーム３，３の前輪８，８、後輪４，４間下方には、左右
の前・後昇降リンク３１，３１，…４本を介して草刈機
２を昇降自在に取り付け、この草刈機２には左右方向中
央前部に中央駆動軸４９ａ、左右両側後部に左・右駆動
軸４９ｂ，４９ｃを夫れ夫れ縦方向に軸架し、中央駆動
軸４９ａを頂点とし、左・右駆動軸４９ｂ，４９ｃを略
二等辺三角形に配置し、夫れ夫れの駆動軸の下端部に回
転刈刃５０ａ，５０ｂ，５０ｃを取り付け草刈装置とし
ている。Next, the mower 2 will be described. Below the front wheels 8, 8 and the rear wheels 4, 4 of the main frames 3, 3, the mowing machine 2 is attached via four front and rear lifting links 31, 31,. 2 has a central drive shaft 49a at the front center in the left and right direction, and left and right drive shafts 49b and 49c at the rear portions on both left and right sides in the longitudinal direction, respectively. The shafts 49b, 49c are arranged in an approximately isosceles triangle, and the rotary mowing blades 50a, 50b, 50c are attached to the lower ends of the respective drive shafts to form a mowing device.

【００２１】これらの回転刈刃５０ａ，５０ｂ，５０ｃ
の回転軌跡は前輪８，８及び後輪よりも両側に突出して
いる。また、隣接する回転刈刃５０ａ，５０ｂ，５０ｃ
の間隔は、当接しない最小の間隙を有しているが、中央
の回転刈刃５０ａが左右の回転刈刃５０ｂ，５０ｃより
も前方に位置しているから、刈取走行時には回転刈刃５
０ａ，５０ｂ，５０ｃ同士は所定寸法だけ重合すること
なり、刈り残しは生じない構成である。These rotary blades 50a, 50b, 50c
The rotation locus protrudes to both sides from the front wheels 8, 8 and the rear wheel. In addition, the adjacent rotary cutting blades 50a, 50b, 50c
Has a minimum gap that does not abut, but since the center rotary blade 50a is located forward of the left and right rotary blades 50b and 50c, the rotary blade 5 during cutting travel is located.
0a, 50b, and 50c overlap each other by a predetermined size, so that uncut leaves are not generated.

【００２２】図１では左駆動軸４９ｂと中央駆動軸４９
ａとは底面視反時計方向に回転し、右駆動軸４９ｃを時
計方向の回転としている。回転刈刃５０ａ，５０ｂ，５
０ｃはプロペラ状の平板であって、長手方向中央部を駆
動軸に取り付け、平板の外周部の回転前縁部に切り刃５
１を構成し、回転後側縁部に芝草を飛散排出する羽根板
５２を構成している。なお、各駆動軸間は同一の各速度
で回転するようにプーリ，伝動ベルトからなる刈刃伝動
装置５３で伝動連結されており、組立て当初は回転刈刃
５０ａ，５０ｂ，５０ｃを夫れ夫れ９０度の位相差で組
み付けている。In FIG. 1, the left drive shaft 49b and the center drive shaft 49
“a” rotates counterclockwise in bottom view, and the right drive shaft 49c rotates clockwise. Rotary blades 50a, 50b, 5
Reference numeral 0c denotes a propeller-shaped flat plate having a central portion in the longitudinal direction attached to a drive shaft, and a cutting blade 5 provided on a rotation front edge of an outer peripheral portion of the flat plate.
1 and a blade 52 for scattering and discharging turfgrass at the side edge after rotation. The drive shafts are connected to each other by a cutting blade transmission device 53 including a pulley and a transmission belt so as to rotate at the same speed. At the initial stage of assembly, the rotary cutting blades 50a, 50b, and 50c are respectively connected. Assembled with a 90 degree phase difference.

【００２３】これらの回転刈刃５０ａ，５０ｂ，５０ｃ
の先端軌跡から所定間隔開けた外周部に、切断した芝草
を案内する外周壁５４を設けている。図１を主体に説明
すると、左駆動軸４９ｂの回転刈刃５０ｂと中央駆動軸
４９ａの回転刈刃５０ａの回転方向を底面視反時計方向
とし、切断した芝草の排出口５５を中央駆動軸４９ａの
回転刈刃５０ａの後側としている。These rotary blades 50a, 50b, 50c
An outer peripheral wall 54 for guiding the cut turfgrass is provided at an outer peripheral portion spaced a predetermined distance from the tip trajectory. 1, the rotation direction of the rotary cutting blade 50b of the left drive shaft 49b and the rotary cutting blade 50a of the central drive shaft 49a is set to be counterclockwise in bottom view, and the cut grass discharge port 55 is connected to the central drive shaft 49a. Of the rotary cutting blade 50a.

【００２４】外周壁５４の前側壁部５４ａを、同方向に
回転する左側の回転刈刃５０ｂおよび中央の回転刈刃５
０ａの前部外周部に沿うように円弧状に接近させてその
端部を互いに接続して接続狭窄部５６とし、その接続狭
窄部５６から排出口５５に向かうように第１排出案内板
５７を延長して設け、その終端部（後端部）を排出口５
５まで延長して臨ませ、左側の回転刈刃５０ｂで切断し
た芝草、および、中央の回転刈刃５０ａで切断した芝草
を別々に排出口５５に案内し、円滑に排出口５５に送り
込む構成である。なお、外周壁５４の後側壁部５４ｂを
回転刈刃５０ａ，５０ｂ，５０ｃの回転軌跡から等間隔
に接近して配置し、その中央よりの端部を排出口５５に
臨ませている。The front side wall portion 54a of the outer peripheral wall 54 is rotated in the same direction by the left rotary blade 50b and the central rotary blade 5.
The first discharge guide plate 57 is made to approach the outer periphery of the front portion 0a in an arc shape and to connect the ends thereof to each other to form a connection constricted portion 56, and the first discharge guide plate 57 is directed from the connection constricted portion 56 to the discharge port 55. The end (rear end) is extended to the outlet 5
5, the turfgrass cut by the left rotating blade 50b and the turfgrass cut by the center rotating blade 50a are separately guided to the discharge port 55, and are smoothly fed into the discharge port 55. is there. The rear wall portion 54b of the outer peripheral wall 54 is arranged at equal intervals from the rotation locus of the rotary cutting blades 50a, 50b, 50c, and the end from the center faces the discharge port 55.

【００２５】また、外周壁５４の前側壁部５４ａを、底
面視で互いに反対方向に回転する右側の回転刈刃５０ｃ
および中央の回転刈刃５０ａの前部外周部に沿うように
円弧状にして、その端部が互いに接続させて接続狭窄部
５６を構成し、その接続狭窄部５６の後端部からから排
出口５５に向かうように第２排出案内板５８を設け、こ
の第２排出案内板５８の終端部と排出口５５との間に比
較的広い合流空間部５９を形成し、右側の回転刈刃５０
ｃで切断した芝草と中央の回転刈刃５０ａで切断した芝
草を合流させながら排出口５５に案内している。The right side rotary cutting blade 50c which rotates the front side wall portion 54a of the outer peripheral wall 54 in opposite directions to each other when viewed from the bottom.
And a circular arc extending along the front outer peripheral portion of the central rotary cutting blade 50a, the ends of which are connected to each other to form a connection constriction portion 56, and a discharge port from the rear end portion of the connection constriction portion 56. A second discharge guide plate 58 is provided so as to face 55, a relatively wide confluence space portion 59 is formed between the end portion of the second discharge guide plate 58 and the discharge port 55, and the right rotary cutting blade 50
The turf grass cut at c and the turf grass cut at the central rotary cutting blade 50a are guided to the discharge port 55 while being joined.

【００２６】そして、これらの回転刈刃５０ａ，５０
ｂ，５０ｃ、外周壁５４の前側壁部５４ａ及び後側壁部
５４ｂの前後外側や左右外側や天井部をデッキ２７で被
覆している。デッキ２７の排出口５５にはデッキ後風路
６０を接続し、その終端部を前記シュータ４１に接続
し、切断した芝草をデッキ後風路６０からシュータ４１
を経てブロワケース３９に送り込む構成である。Then, these rotary blades 50a, 50
b, 50c, the front and rear outer sides, the left and right outer sides, and the ceiling of the front side wall portion 54a and the rear side wall portion 54b of the outer peripheral wall 54 are covered with the deck 27. An outlet 55 of the deck 27 is connected to an air passage 60 after the deck, and an end portion thereof is connected to the shooter 41.
Through the blower case 39.

【００２７】互いに反対方向に回転する右側の回転刈刃
５０ｃの外周部に沿う前側壁部５４ａと、中央の回転刈
刃５０ａの外周部に沿う前側壁部５４ａとを接続した接
続狭窄部５６には、底面視菱形板体６１ａからなる分散
装置６１を設けている。しかして、接続狭窄部５６に集
まりがちな芝草を左右に分散させて、回転刈刃５０ａと
回転刈刃５０ｃの先端間隙部へのまとまった流れを少な
くしながら、芝草が前側壁部５４ａの下端縁を潜り中央
の回転刈刃５０ａ，右側の回転刈刃５０ｃの回転中心に
向かうように送り込むことができて、切り刃５１で良好
に切断できる。The connection narrowing portion 56 connects the front wall portion 54a along the outer peripheral portion of the right rotary cutting blade 50c rotating in the opposite direction to the front wall portion 54a along the outer peripheral portion of the central rotary cutting blade 50a. Is provided with a dispersing device 61 composed of a rhombic plate 61a in bottom view. Thus, the turfgrass, which tends to gather in the connection narrowing portion 56, is dispersed to the right and left so that the flow of the turfgrass to the gap between the distal ends of the rotary cutting blades 50a and 50c is reduced, and the turfgrass is formed at the lower end of the front wall portion 54a. The edge can be sent to the center of rotation of the rotary cutter blade 50a at the center and the rotary cutter blade 50c at the right side, so that the cutting blade 51 can cut well.

【００２８】なお、この実施例では底面視で菱形板体６
１ａにより分散装置６１を構成しているが、このような
形状に限定されるものではなく、接続狭窄部５６に集ま
る芝草を左右に分散して前側壁部５４ａ下方から内側へ
導くものであればよくこの実施例に限定されるものでは
ない。In this embodiment, the rhombus plate 6 is viewed from the bottom.
Although the dispersing device 61 is constituted by 1a, the shape is not limited to such a shape, and any device may be used as long as the turfgrass gathering at the connection narrowing portion 56 is dispersed right and left and guided inward from below the front wall portion 54a. The present invention is not limited to this embodiment.

【００２９】また、同じ方向に回転する左側の回転刈刃
５０ｂの外周部に沿う前側壁部５４ａと、中央の回転刈
刃５０ａの外周部に沿う前側壁部５４ａとを接続した接
続狭窄部５６には、底面視で三角形状板体６１ｂにより
構成した分散装置６１を設けている。しかして、接続狭
窄部５６に集まる芝草を左右に分散させて、回転刈刃５
０ａと回転刈刃５０ｃの先端間隙部へのまとまった流れ
を少なくしながら前側壁部５４ａの下方から内側に進入
し、夫れ夫れ回転刈刃５０ｂの回転中心に向かうように
送り込むことができて、切り刃５１で良好に切断でき
る。Further, a connection narrowing portion 56 connecting the front side wall portion 54a along the outer peripheral portion of the left rotary cutting blade 50b rotating in the same direction and the front side wall portion 54a along the outer peripheral portion of the central rotary cutting blade 50a. Is provided with a dispersion device 61 constituted by a triangular plate body 61b when viewed from the bottom. Thus, the lawn grass gathering at the connection narrowing portion 56 is dispersed right and left, and
0a and the cutting edge of the rotary cutting blade 50c can enter into the inside from below the front side wall portion 54a while reducing the mass flow to the tip gap portion, and can be sent toward the rotation center of the rotary cutting blade 50b, respectively. Thus, the cutting blade 51 can satisfactorily cut.

【００３０】左側の回転刈刃５０ｂの外周部に沿う前側
壁部５４ａ、中央の回転刈刃５０ａの外周部に沿う前側
壁部５４ａ、及び、右側の回転刈刃５０ｃの外周に沿う
前側壁部５４ａを接続した接続狭窄部５６には、芝草が
集まる傾向にあり、集まった芝草が一挙に前側壁部５４
ａの下方を潜り内側に進入すると、回転刈刃５０ａ，５
０ｂ，５０ｃの先端間隙部に多くの芝草が流れ切断でき
ずに刈り残しが生じるという不具合が発生していた。A front wall portion 54a along the outer peripheral portion of the left rotary cutting blade 50b, a front wall portion 54a along the outer peripheral portion of the central rotary cutting blade 50a, and a front wall portion along the outer peripheral portion of the right rotary cutting blade 50c. There is a tendency for turfgrass to gather in the connection narrowing portion 56 connecting the first and second ridges 54a, and the gathered turfgrass is collected at once in the front wall portion 54.
a, and enters the inside of the rotary cutting blade 50a, 50a.
There was a problem that a lot of turfgrass flowed into the gap between the tips of 0b and 50c and could not be cut, resulting in uncut leaves.

【００３１】このように不具合を解消するために、草刈
機２の直進走行時における回転刈刃５０ａ，５０ｂ，５
０ｃの先端相互間のオーバーラップ代を大きくする方法
もあるが、トラクタの旋回刈取時には、回転刈刃５０
ａ，５０ｂ，５０ｃの先端相互間の間隙部に芝草が集ま
り刈り残しが発生していた。しかし、前記構成のよう
に、前側壁部５４ａの接続狭窄部５６に分散装置６１を
設けることにより、このような不具合を解消することが
できる。In order to solve such a problem, the rotary cutting blades 50a, 50b, 5 when the mowing machine 2 is running straight.
Although there is a method of increasing the overlap margin between the tips of the tractor 0c, the rotary cutting blade 50
Turfgrass gathered in the gap between the tips of a, 50b, and 50c, and uncut leaves were generated. However, such a problem can be solved by providing the dispersing device 61 in the connection narrowing portion 56 of the front side wall portion 54a as in the above configuration.

【００３２】次に、図７に基づき草刈機２の他の実施例
について説明する。トラクタの機体前側部に前ヒッチ６
２を取り付け、前ヒッチ６２には平行状態で昇降する前
上部リンク６３，６３及び前下部リンク６４，６４を設
け、油圧シリンダ３４からなる伸縮アクチュエータによ
り昇降させる構成である。草刈機２の後部にはブラケッ
ト６５を設け、ブラケット６５に側面視Ｌ形の連結体６
６をピン６７により回動自在に連結し、この連結体６６
に前上部リンク６３，６３及び前下部リンク６４，６４
の前端部をピン連結している。Next, another embodiment of the mower 2 will be described with reference to FIG. Front hitch 6 on front side of tractor
2, the front hitch 62 is provided with front upper links 63, 63 and front lower links 64, 64 which move up and down in a parallel state, and are moved up and down by a telescopic actuator composed of a hydraulic cylinder 34. A bracket 65 is provided at the rear of the mowing machine 2, and the L-shaped connecting body 6
6 are rotatably connected to each other by a pin 67.
Front upper links 63, 63 and front lower links 64, 64
Is pin-connected to the front end.

【００３３】草刈機２の前部に取り付けられているゲー
ジ取付棒６８には、ゲージ車輪３５を上下調節自在に支
持している。また、連結体６６にはストッパ６９を調節
ボルト７０を介して上下調節自在に設け、ストッパ６９
と草刈機２のデッキ２７との間隔を調節することによ
り、草刈機２のピン６７回りの回動範囲を調整する構成
としている。なお、図面を省略したが、トラクタの前Ｐ
ＴＯ軸から屈折伝動軸を介して草刈機２に動力が伝達さ
れて、３枚の回転刈刃５０ａ，５０ｂ，５０ｃが駆動さ
れる。The gauge wheel 35 is supported on a gauge mounting rod 68 attached to the front of the mower 2 so as to be vertically adjustable. A stopper 69 is provided on the connecting body 66 via an adjustment bolt 70 so as to be vertically adjustable.
The rotation range around the pin 67 of the mower 2 is adjusted by adjusting the distance between the mower 2 and the deck 27 of the mower 2. In addition, although illustration was omitted, P in front of the tractor
Power is transmitted from the TO shaft to the mower 2 via the refraction transmission shaft, and the three rotary cutting blades 50a, 50b, 50c are driven.

【００３４】しかして、前上部リンク６３，６３及び前
下部リンク６４，６４を下降して、草刈機２を刈り取り
状態として刈取作業をする。作業地表面に凹凸がある場
合でも、ゲージ車輪３５，３５が凹凸に追従し上下動す
ると、草刈機２はピン６７回りに回動して地表面に追従
し、油圧シリンダ３４を伸縮調節することなく、草刈機
２を地表面に追従させ所定の刈り高さで芝草を刈り取る
ことができる。Then, the front upper links 63, 63 and the front lower links 64, 64 are lowered, and the mowing machine 2 is in a cutting state to perform a cutting operation. When the gauge wheels 35, 35 follow the unevenness and move up and down even when the work surface has irregularities, the mower 2 rotates around the pin 67 to follow the ground surface, and expands and contracts the hydraulic cylinder 34. Instead, the mowing machine 2 can follow the ground surface and mow the turfgrass at a predetermined cutting height.

【００３５】また、図８に示すように、前上部リンク６
３，６３及び前下部リンク６４，６４を上昇させた状態
で、前ヒッチ６２の固定ピン７１でロックし、前記油圧
シリンダ３４の後端部を前ヒッチ６２から取り外し、油
圧シリンダ３４の後端部を前ヒッチ６２下部の下部連結
部７２に付け代える構成とする。As shown in FIG. 8, the front upper link 6
3 and 63 and the front lower links 64, 64 are raised, locked by the fixing pins 71 of the front hitch 62, the rear end of the hydraulic cylinder 34 is removed from the front hitch 62, and the rear end of the hydraulic cylinder 34 Is replaced with the lower connecting portion 72 below the front hitch 62.

【００３６】しかして、油圧シリンダ３４を短縮調節す
ると、草刈機２をピン６７の回りに回動し、草刈機２を
機体前部に接近させてトラクタの前後長さを短くでき、
トラクタのトラックへの積込を容易にすることができ
る。Thus, when the hydraulic cylinder 34 is shortened and adjusted, the mower 2 is rotated around the pin 67, and the mower 2 is brought closer to the front of the fuselage to shorten the front-rear length of the tractor.
Loading of the tractor on the truck can be facilitated.

【図面の簡単な説明】[Brief description of the drawings]

【図１】 草刈機の要部の底面図である。FIG. 1 is a bottom view of a main part of a mower.

【図２】 草刈機を移動車両に取り付けた状態の平面図
である。FIG. 2 is a plan view showing a state in which the mower is attached to a moving vehicle.

【図３】 全体の側面図である。FIG. 3 is an overall side view.

【図４】 要部の斜視図である。FIG. 4 is a perspective view of a main part.

【図５】 要部の切断側面図である。FIG. 5 is a cut-away side view of a main part.

【図６】 全体の斜視図である。FIG. 6 is an overall perspective view.

【図７】 要部の側面図である。FIG. 7 is a side view of a main part.

【図８】 要部の側面図である。FIG. 8 is a side view of a main part.

【符号の説明】[Explanation of symbols]

１ 移動車両 ２ 草刈機 ３ リフトアーム ２７ デッキ ４９ａ 中央駆動軸ス ４９ｂ 左駆動軸 ４９ｃ 右駆動軸 ５０ａ 中央回転刈刃 ５０ｂ 左回転刈刃 ５０ｃ 右回転刈刃 ５１ 切り刃 ５２ 羽根板 ５４ 外周壁 ５４ａ 前側壁部 ５４ｂ 後側壁部 ５５ 排出口 ５６ 接続狭窄部 ５７ 第１排出案内板 ５８ 第２排出案内板 ５９ 合流空間部 ６１ 分散装置 ６１ａ 菱形板体 ６１ｂ 三角形状板体 DESCRIPTION OF SYMBOLS 1 Moving vehicle 2 Mower 3 Lift arm 27 Deck 49a Center drive shaft 49b Left drive shaft 49c Right drive shaft 50a Center rotating blade 50b Left rotating blade 50c Right rotating blade 51 Cutting blade 52 Blade plate 54 Outer wall 54a Front Side wall part 54b Rear wall part 55 Outlet 56 Connection constriction part 57 First discharge guide plate 58 Second discharge guide plate 59 Merging space 61 Dispersion device 61a Diamond plate 61b Triangular plate

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 左右方向に並列配置している複数の回
転刈刃５０ａ，５０ｂ，５０ｃの上方と側方をカバー体
であるデッキ２７で被覆して草刈機２を構成し、この草
刈機２を移動車両１に昇降自在に取り付け、これらの回
転刈刃５０ａ，５０ｂ，５０ｃの先端軌跡から所定間隔
開けた外周部に外周壁５４を設け、外周壁５４の前側壁
部５４ａを、前記回転刈刃５０ａ，５０ｂ，５０ｃの前
部外周部に沿うように円弧状としその端部を互いに接続
して接続狭窄部５６とし、前記接続狭窄部５６には分散
装置６１を設けたことを特徴とする草刈機。1. A mowing machine 2 comprising a plurality of rotary mowing blades 50a, 50b, 50c, which are arranged side by side in the left-right direction, covered by a deck 27 as a cover body. Is mounted on the moving vehicle 1 so as to be able to move up and down freely, and an outer peripheral wall 54 is provided at an outer peripheral portion spaced a predetermined distance from the tip trajectory of the rotary cutting blades 50a, 50b, 50c. The blades 50a, 50b, 50c are formed in a circular arc shape along the outer peripheral portion of the front part, and their ends are connected to each other to form a connection constriction portion 56. The connection constriction portion 56 is provided with a dispersion device 61. Mower. 【請求項２】 互いに反対方向に回転する回転刈刃５
０ａと回転刈刃５０ｃの外周部に沿う前側壁部５４ａ，
５４ａを接続した接続狭窄部５６には、底面視菱形板体
６１ａからなる分散装置６１を設けたことを特徴とする
請求項１記載の草刈機。2. A rotary cutting blade 5 rotating in opposite directions to each other.
0a and the front side wall portion 54a along the outer peripheral portion of the rotary blade 50c,
The mowing machine according to claim 1, wherein a dispersing device (61) comprising a rhombic plate (61a) is provided at the connection constricted portion (56) connected to (54a). 【請求項３】 同じ方向に回転する回転刈刃５０ａと
回転刈刃５０ｂの外周部に沿う前側壁部５４ａ，５４ａ
を接続した接続狭窄部５６には、底面視で三角形状板体
６１ｂで構成した分散装置６１を設けたことを特徴とす
る請求項１記載の草刈機。3. Front wall portions 54a, 54a along the outer peripheral portions of the rotating blades 50a and 50b rotating in the same direction.
The mowing machine according to claim 1, wherein a dispersing device 61 constituted by a triangular plate 61b when viewed from the bottom is provided in the connection constriction portion 56 connected to the mower.