【発明の詳細な説明】
産業上の利用分野
本発明は乗用田植機や湛水土中直播機等の水田作業車の
本機に防除機を着脱自在に装着して畦間作物の消毒防除
を行え得るようにした水田作業車における防除装置に関
するものである．従来の技術及び解決すべき課題
自走式の防除機としてトラクタ牽引式のものや防除専用
機が知られているが、乗用田植機や湛水上中直播機等の
水田作業車の本機を利用した防除装置は提供されていな
い．乗用田植機等従来の水田作業車は走行機体（本機）
に平行リンクを介して植付部等が着脱自在に且つ昇降自
在に装着されており、水田での植付や播種作業を行うも
ので、いわば田植等の水田専用機であるため、高価な機
械でありながら年間の稼動期間は田植（播種）時期のみ
に限定される非常に短いものであり、これが生産コスト
の低減化を困難にしている一因となっている．然るに、
乗用田植機等の水田作業車の木機に重量の重い薬剤タン
クを有する防除機を連結して作物の防除作業を行うこと
は平行リンクの揚力や強度等の点で問題がある．
課題を解決するための手段
そこで本発明は、次のように構成したことによって上記
の問題点を解決したものである．即ち，本機後部にヒッ
チ部を有する平行リンクを介して作業機を着脱自在に装
着してなる水田作業車において、前記平行リンクに防除
機を着脱自在に装着すると共に，防除機の薬剤タンクを
本機側に接近させて配置した水田作業車における防除装
置としたものである．
作 用
作物の防除作業を行う場合は，水田作業車例えば乗用田
植機の本機に平行リンク及びヒッチ部を介して装着され
ている植付部を取外し，防除機をヒッチ部で連結すると
共にタンクに薬剤を収容した後，本機を走行させて防除
作業を開始する．ところで本発明では薬剤タンクを本機
側に接近させて配置してあるので、タンク重心が本機側
に近くなり，それだけ防除機昇降時における平行リンク
や油圧昇降装置の負担が少なくなり、その分タンク容量
を大きく設定できる．また、上記防除機の連結の際には
、薬剤タンクをヒッチ部近傍から退避させた状態で行う
ことにより、ヒッチ部が運転席位置から視認できるので
自動着脱式のヒッチ構造であっても連結操作を的確に行
える．実 施 例
本発明の構成を図面に示された一実施例により説明する
．１は前輪２及び後輪３を有し前部にエンジン４を搭載
した水田作業車（図示例では乗用田植機）の木機で，そ
の後部にはトップリンク５及びロワリンク６からなる平
行リンク７を介して植付部Ｍ（第３図参照）が着脱自在
に装着され、植付部Ｍはロワリンク６に連結された図示
外の油圧リフトアームの回勤により水平姿勢を保持した
ままの状態で上下動し得るようになっている．Ｒは油圧
操作レバーで、１本のレバーＲで油圧バルブとＰＴＯク
ラッチの双方を同時に制御し得るようになっている．８
は平行リンク７の遊端側（植付部Ｍ連結側）に設けた本
機側ヒッチで、該本機側ヒッチ８に対し作業機側ヒッチ
９が着脱自在に連結され゜ている．この本機側ヒッチ８
と作業機側ヒッチ９の構造は第４図及び第５図に例示さ
れている．即ち、本機側ヒッチ８は上下のピン挿入孔８
ａ，８ｂに貫装された連結ピン１０．１１を介してトッ
プリンク５とロワリンク６の遊端側に連結されるもので
、平面視においてコ字形状を呈し、後面側には上端隅角
部に位置して樋状のピン受座８Ｃが一体に固着され、長
手方向中途部に位置して横方向のピン嵌入構８ｄが形成
されている．また、本機側ヒッチ８内にはピン挿入溝８
ｄの近傍に位置して枢支ビンｌ２を中心にして上下に回
動するロック用のフック１３が設けられ、該フック１３
はワイヤ１４を介し運転席で手元操作できるようになっ
ている．一方，作業機側とッチ９は本機側ヒッチ８より
も巾広のコ字形状で本機側ヒッチ８と同様前方側が開放
されると共にピン１５，ｌｆｔが上下に横架されていて
，上記手元操作によりヒッチ部Ｈはワンタッチで着脱し
得るようになっている．そして，作業機側とッチ９には
防除機Ｓが一体的に連結されている．即ち，作業機側ヒ
ッチ９の背面側には本機側のＰＴＯ軸に駆動軸１７ａを
介して連動連結された動力噴霧機ｌ７が機枠ｌ８内に固
定され、動力噴Ｓａ１７の上方に′は枠体１９が略前半
部を平行リンク７上に臨ませた状態で作業機側ヒッチ９
と機枠！８に一体的に固着され、該枠体！９内には攪拌
機２０ａ付き薬剤タンク２０が本機側に接近させて配置
され、素締バンド２ｌにより着脱自在に固定されている
．２２は枠体Ｉｌ１の前端部に折畳み自在に付設された
補助ステップ、２３は吸引パイプ、２４は吐出パイプで
、吐出パイプ２４は攬拌ｆｉ２０ａ及びパイプ２５を介
して後述の噴管２６に連通されている．
ところで、上記攪拌機２０ａは図示しなかったが，薬剤
の吐出圧で回転する羽根車と分流弁が内蔵され，羽根車
の回転によりタンク２０内に貫装した攪拌羽根軸を強制
回転し，タンク内の薬剤を攪拌するようになっている．
このため動力噴霧機１７の吐出圧（吐出量）は予め高め
に設定されており，余分な薬剤は戻しパイプ２７を経由
してタンク２０内に環流させるようにしている．２８は
枠体夏８の後部に固定したボスで、該ボス２８には所定
間隔を存して噴管２６を垂設した丸棒状のステ−２９を
回勤可能に且つ両翼を折畳み自在に貫挿させてあり，運
転席ａの一側に設けたレバー３０の操作でワイヤ３１を
介しステ−２９と一体のアーム２９ａを引き，噴管２θ
を上方に回動させるようにしている．噴管２Ｂは障害物
等へ当った際、破損・変形を防止すべく基端側をゴムホ
ース等の可撓管２８ａを介して折曲自在に構成し、その
外側をコイルスプリング２８ｂで巻き噴管２６を直管状
に保持している．３２はホース，３３は噴口である拳
さて、前輪２及び後輪３にはステ−３４ａ，３５ａを介
して分草ガイド３４．３５が設けられ、車輪による作物
の巻込みを防止するようになっている．尚、第７図及び
第８図に示すものは前輪２の前方にステ−３６を介して
平面視でＶ字形状のガイド板３７を設けたものである．
第９図及び第ｌＯ図に示すものは、薬剤タンク２０をヒ
ッチ部Ｈ上方を覆う位置とヒッチ部Ｈ近傍から退避した
位置とに切換可能に構成したものである．即ち，第９図
はタンク２０を前後スライド方式に構成したもので、作
業機側ヒッチ９と機枠！８上前後方向に左右一対のレー
ル３８を固着し、該レール３８に枠体ｌ８゜及びタンク
２０を前後方向摺勤可能に搭載し、本機ｌに対する防除
機の着脱時には仮想線図示のようにタンク２０をレール
３８に沿って後方に移動させ、防除作業時にはタンク２
０を本機ｌに接近した実線図示の位置に戻し止め具３９
で枠体１３′ をレール３８上に固定するようにしてい
る．図中、ｌ８゜は機枠ｌ８に固設したスタンドである
．また、第ｌＯ図はタンク２０を回動式に構成したもの
で、枠体ｌ９゜ａの後端部を支軸４０で機枠１８に枢結
することにより、タンク２０を図示のように起倒し得る
ようになっている．尚．このものにおいては図示しなか
ったが、実線図示のセット位置を保持させるためピン或
はフック等からなるロック装訝が付設されている．
上記の構成において、作物ｂの消毒●防除作業を行う場
合には、乗用田植機の本機ｌ側から植付部Ｍを取外し、
防除＠Ｓを連結する．この際，平行リンク７を下げた状
態で本機１を接地状態の防除ａＳ（噴管２８は上げてお
く）に向け後退させ、本機側とッチ８のビン受座８Ｃに
作業機側とッチ９の上部ピンｌ５を載せ，その状態で油
圧・ＰＴＯクラッチレバーＲを操作して平行リンク７を
上昇させれば作業機側ヒッチ９は防除機Ｓの自重により
上部ピン９を中心にして下方に回勤し，作業機側ヒッチ
９の下部ビン１Ｂが本機側と７チ８のピン嵌入溝８ｄに
嵌入するのでフックｌ３を手元操作して本機側ヒッチ８
と作業機側ヒッチ９をロックする．そして，レバー操作
で防除機Ｓを所要噴霧高さに固定（油圧固定）し、タン
ク２０に散布すべき薬剤を入れた後．噴管２Ｂを作物ｂ
の畦間に合せて回動セットし．ＰＴＯクラッチを入れて
本機ｌを走行させればタンク２０内の薬剤は吸引バイプ
２３、勤力噴霧機ｌ７、吐出バイプ２４、攪拌Ｉａ２０
ａ、バイプ２５を順次経由して噴管２Ｂの噴口３３から
作物ｂに散布される．条端での回行は噴管２６をワイヤ
３ｌによる手元操作で第１図仮想線図示の水平状態に回
動させて行う．
ところで，本発明の防除装置は，走行機体として機体重
量が比較的軽く且つ接地面からの機体高さが高くしかも
車輪（タイヤ）巾が狭い乗用田植機等の本ｍｌを利用し
ているので，トラクタ等では入りにくい狭い畦巾の作業
でも畦や野菜等を荒らすことなく身軽に乗り入れて防除
作業等が行える．しかも、防除機Ｓの薬剤タンク２０は
本機１側へ接近させて配置してあるので，タンク重心が
木機！側に近くなり，作業中における機体の＃後バラン
スを良好にして安定した防除作業が行える．そのうえ平
行リンク７の強度や揚力不足等の問題を解消しながらタ
ンク容量を極力大きく設定でき、その分タンク２０に対
する薬剤供給の回数が少なくて済み作業性が高められる
．
また，薬剤タンク２０をヒッチ部Ｈ上方を覆う位置とヒ
ッチ部Ｈ近傍Ｉら退避した位置とに切換可能に構成した
場合には、本機ｌへの防除機Ｓ着脱時にはタンク２０を
ヒッチ部Ｈ近傍から退避させておくことにより、運転席
ａ位置からヒッチ部Ｈを容易に視認できるので着脱作業
を迅速且つ的確に行える．
発明の効果
上記したように本発明は．木機後部にヒッチ部を有する
平行リンクを介して作業機を着脱自在に装着してなる水
田作業車において、前記平行リンクに防除機を着脱自在
に装着すると共に、防除機の薬剤タンクを本機側に接近
させて配置したから乗用田植機等既存の水田作業車の木
機に特別な改良を加えることなく，水田作業車の利用率
を大幅に高めることができ、且つ水田作業車の機崗●特
性を有効に活用して畦間作物の消毒ｅ防除を行うことが
できるので、野菜畑等畦間が狭くトラクタが入り込めな
い圃場であっても容易に作業を行うことができる．しか
も、防除機の薬剤タンクを本機側に接近させて配置して
あるので、タンク重心が本機側に近くなり、平行リンク
の強度や揚力上の問題を解消しながらタンク容量を極力
大きく設定でき、もってタンクに対する薬剤供給の回数
を少なくし得て作業能率の向上が図られると共に機体の
前後バランスを良好に保持できる．また，薬剤タンクを
ヒッチ部上方を覆う位置とヒッチ部近傍から退避した位
置とに切換可能に構成した場合には、ヒッチ部の連結作
業を容易に行うことができる．[Detailed Description of the Invention] Industrial Field of Application The present invention enables disinfection and control of crops in the rows by attaching a pest control machine to the main unit of a rice field working vehicle such as a riding rice transplanter or a submerged soil direct sowing machine in a detachable manner. This article relates to a pest control device for use in paddy field work vehicles. Conventional technology and issues to be solved Self-propelled pest control machines such as tractor-pulled machines and dedicated pest control machines are known, but this machine can be used for rice field work vehicles such as riding rice transplanters and submerged direct sowing machines. No pest control equipment is provided. Conventional rice paddy work vehicles such as riding rice transplanters have a traveling body (this machine).
The planting part etc. is attached to the machine through a parallel link so that it can be detached and moved up and down freely, and it is used for planting and sowing in rice fields, so it is an expensive machine because it is a machine dedicated to paddy fields such as rice transplantation. However, the annual operating period is very short, limited only to the rice planting (seeding) period, and this is one reason why it is difficult to reduce production costs. However,
Performing crop control work by connecting a heavy pest control machine with a chemical tank to the wooden machine of a paddy field vehicle such as a riding rice transplanter has problems in terms of the lifting force and strength of the parallel link. Means for Solving the Problems The present invention solves the above problems by having the following configuration. That is, in a paddy field work vehicle in which a working machine is removably attached via a parallel link having a hitch portion at the rear of the machine, a pest control machine is detachably attached to the parallel link, and a chemical tank of the pest control machine is installed. This is a pest control device for a rice paddy work vehicle placed close to the machine. When performing pest control work on crops, remove the planting section of the paddy field vehicle, such as a riding rice transplanter, which is attached to the machine via a parallel link and hitch section, connect the pest control machine with the hitch section, and connect the planter to the tank. After filling the container with chemicals, the machine is driven to begin pest control work. By the way, in the present invention, the chemical tank is placed close to the machine, so the center of gravity of the tank is closer to the machine, which reduces the burden on the parallel links and hydraulic lifting device when the pest control machine goes up and down. Tank capacity can be set large. In addition, when connecting the above pest control machine, by retracting the chemical tank from the vicinity of the hitch part, the hitch part can be seen from the driver's seat position, so even if the hitch structure is an automatic detachable type, the connection operation can be performed. can be performed accurately. Embodiment The configuration of the present invention will be explained using an embodiment shown in the drawings. 1 is a paddy field work vehicle (a riding rice transplanter in the illustrated example) having front wheels 2 and rear wheels 3 and an engine 4 mounted on the front, and a parallel link 7 consisting of a top link 5 and a lower link 6 at the rear. The planting section M (see Fig. 3) is detachably attached via the , and the planting section M is maintained in a horizontal position by the movement of a hydraulic lift arm (not shown) connected to the lower link 6. It is designed to be able to move up and down. R is a hydraulic control lever, and one lever R can control both the hydraulic valve and the PTO clutch at the same time. 8
is a machine-side hitch provided on the free end side of the parallel link 7 (on the side where the planting part M is connected), and a work machine-side hitch 9 is detachably connected to the machine-side hitch 8. This machine side hitch 8
The structure of the work machine side hitch 9 is illustrated in FIGS. 4 and 5. In other words, the hitch 8 on the machine side is inserted into the upper and lower pin insertion holes 8.
It is connected to the free end sides of the top link 5 and lower link 6 via connecting pins 10.11 inserted through the a and 8b, and has a U-shape in plan view, with an upper corner portion on the rear side. A trough-shaped pin receiving seat 8C is integrally fixed at a position in the center, and a lateral pin fitting structure 8d is formed at a midway point in the longitudinal direction. In addition, there is a pin insertion groove 8 in the hitch 8 on the machine side.
A locking hook 13 is provided near d and rotates up and down about the pivot pin l2.
can be operated from the driver's seat via a wire 14. On the other hand, the work machine side hitch 9 has a U-shape that is wider than the machine side hitch 8, and the front side is open like the machine side hitch 8, and the pin 15 and lft are vertically suspended horizontally. The hitch part H can be attached and detached with one touch using the above-mentioned hand operation. A pest control machine S is integrally connected to the work machine side and the switch 9. That is, on the back side of the hitch 9 on the work equipment side, a power sprayer l7 that is interlocked and connected to the PTO shaft on the main machine side via a drive shaft 17a is fixed in the machine frame l8, and above the power sprayer Sa17 is a With the frame body 19 facing approximately the front half onto the parallel link 7, the work machine side hitch 9 is
And the machine frame! 8 and is integrally fixed to the frame! A drug tank 20 with an agitator 20a is placed in the tank 9 close to the machine and is removably fixed with a strap 2l. 22 is an auxiliary step foldably attached to the front end of the frame Il1, 23 is a suction pipe, and 24 is a discharge pipe, and the discharge pipe 24 is connected to a jet pipe 26, which will be described later, via an agitation fi 20a and a pipe 25. ing. By the way, although the above-mentioned agitator 20a is not shown, it has a built-in impeller that rotates with the discharge pressure of the medicine and a flow divider valve, and the rotation of the impeller forcibly rotates the agitation impeller shaft inserted in the tank 20, so that the inside of the tank is It is designed to stir the drug.
For this reason, the discharge pressure (discharge amount) of the power sprayer 17 is set in advance to be high, and the excess medicine is circulated into the tank 20 via the return pipe 27. Reference numeral 28 denotes a boss fixed to the rear part of the frame body summer 8, and a round rod-shaped stay 29 with a jet pipe 26 hanging thereon at a predetermined interval extends through the boss 28 so as to be rotatable and both wings can be freely folded. By operating the lever 30 provided on one side of the driver's seat a, the arm 29a integrated with the stay 29 is pulled via the wire 31, and the injection pipe 2θ is
I'm trying to rotate it upwards. In order to prevent damage and deformation when hitting an obstacle, the jet pipe 2B is configured such that its base end can be bent freely via a flexible pipe 28a such as a rubber hose, and the outside of the jet pipe 2B is wrapped with a coil spring 28b. 26 is held in a straight tube shape. Reference numeral 32 indicates a hose, and 33 indicates a spout.The front wheels 2 and rear wheels 3 are provided with weeding guides 34 and 35 via stays 34a and 35a to prevent crops from getting caught in the wheels. ing. 7 and 8, a V-shaped guide plate 37 is provided in front of the front wheel 2 via a stay 36 in a plan view. 9 and 10, the drug tank 20 is configured to be switchable between a position covering the upper part of the hitch part H and a position retracted from the vicinity of the hitch part H. That is, FIG. 9 shows a structure in which the tank 20 is configured to slide back and forth, with the hitch 9 on the work machine side and the machine frame! A pair of left and right rails 38 are fixed in the front and back direction on the top of 8, and the frame 18 and the tank 20 are mounted on the rails 38 so as to be able to slide in the front and back direction. The tank 20 is moved backward along the rail 38, and during pest control work, the tank 20 is
Return the stopper 39 to the position shown by the solid line close to the machine l.
The frame body 13' is fixed on the rail 38. In the figure, l8° is a stand fixed to the machine frame l8. In addition, FIG. 10 shows a structure in which the tank 20 is configured to be rotatable, and by pivotally connecting the rear end of the frame l9°a to the machine frame 18 with a support shaft 40, the tank 20 can be raised as shown. It is now possible to defeat it. still. Although not shown in this figure, a locking mechanism consisting of a pin or hook is provided to maintain the set position shown by the solid line. In the above configuration, when performing disinfection and pest control work on crop B, remove the planting part M from the machine L side of the riding rice transplanter,
Connect pest control@S. At this time, with the parallel link 7 lowered, move the machine 1 backward toward the grounded pest control aS (spout pipe 28 is raised), and place the machine side and the bottle seat 8C of the switch 8 on the work machine side. If the upper pin l5 of the hitch 9 is placed on it and the parallel link 7 is raised by operating the hydraulic/PTO clutch lever R in this state, the work machine side hitch 9 will be centered around the upper pin 9 due to the weight of the dust control machine S. The lower bin 1B of the work machine side hitch 9 is inserted into the pin insertion groove 8d of the machine side and 7th hitch 8, so the machine side hitch 8 is moved by manually operating the hook 13.
and lock the work equipment side hitch 9. Then, by operating the lever, the pest control machine S is fixed at the required spray height (hydraulic fixation), and the chemical to be sprayed is poured into the tank 20. Crop b with spout pipe 2B
Set the rotation to match the ridges. When the PTO clutch is engaged and the machine is run, the medicine in the tank 20 will be transferred to the suction pipe 23, the force sprayer 17, the discharge pipe 24, and the stirring machine 1a 20.
a, sprayed onto crop b from the nozzle 33 of the nozzle pipe 2B via the vip 25 in sequence. Circulation at the end of the strip is carried out by manually operating the jet tube 26 using the wire 3l to rotate it to a horizontal position as shown by the phantom line in Figure 1. By the way, since the pest control device of the present invention uses a traveling machine such as a riding rice transplanter, which has a relatively light body weight, a high body height from the ground surface, and a narrow wheel (tire) width, Even when working in narrow ridges that are difficult to enter with a tractor, etc., you can easily get in and carry out pest control work without damaging the ridges or vegetables. Moreover, the chemical tank 20 of the pest control machine S is placed close to the main machine 1 side, so the center of gravity of the tank is the same as the wood machine! By being close to the side, the aircraft can maintain a good balance during work, allowing stable pest control work. Furthermore, the tank capacity can be set as large as possible while solving problems such as the strength of the parallel link 7 and insufficient lift, and the number of times the chemical is supplied to the tank 20 can be reduced accordingly, improving work efficiency. In addition, if the chemical tank 20 is configured to be switchable between a position that covers the upper part of the hitch part H and a position that is evacuated from the vicinity of the hitch part H, the tank 20 can be moved to the hitch part H when attaching and detaching the pest control machine S to and from the main unit I. By evacuating the hitch part H from the vicinity, the hitch part H can be easily seen from the driver's seat a position, allowing quick and accurate attachment and detachment work. Effects of the Invention As mentioned above, the present invention has the following advantages. In a paddy field work vehicle in which a working machine is removably attached to the rear of the woodworking machine through a parallel link having a hitch part, a pest control machine is detachably attached to the parallel link, and the chemical tank of the pest control machine is attached to the machine. Because it is placed close to the side, the utilization rate of rice paddy work vehicles can be greatly increased without making any special improvements to the existing wooden machines of rice paddy work vehicles such as riding rice transplanters. ●By effectively utilizing its characteristics, it is possible to perform disinfection e-control on crops in the furrows, so it can be easily used in fields such as vegetable fields where the furrows are narrow and a tractor cannot enter. Furthermore, since the chemical tank of the pest control machine is placed close to the machine side, the center of gravity of the tank is closer to the machine side, and the tank capacity is maximized while eliminating problems with the strength and lift of the parallel link. As a result, the number of times the chemical is supplied to the tank can be reduced, improving work efficiency and maintaining a good front-to-back balance of the machine. Furthermore, if the drug tank is configured to be switchable between a position covering the upper part of the hitch part and a position retracted from the vicinity of the hitch part, the work of connecting the hitch part can be easily performed.
【図面の簡単な説明】[Brief explanation of drawings]
第１図は乗用田植機の本機に防除機を連結した状態の全
体側面図、第２図は同上背面図、第３図は乗用田植機の
側面図，第４図は本機側ヒー２チと作業機側ヒッチの構
造を示す斜視図、第５図は本機側ヒッチと作業機側ヒッ
チの連結状態を示す断面図，第６図は本機の平面図、第
７図は分草板を設けた本機に防除機を連結した状態の側
面図，第８図は同上の本機側平面図，第９図及び第１０
図は薬剤タンクをヒッチ郡上方を覆う位置とヒッチ部近
傍から退避した位置とに切換可能に構成した例の夫々側
面図である．
１・・・水田作業車の本機，７・・・平行リンク，８・
・・本機側ヒッチ、９・・・作業機側ヒッチ、ｌ７・・
・動力噴霧機、２０・・・薬剤タンク、Ｈ・・・ヒッチ
部，Ｍ・・・植付部、Ｓ・・・防除機．Figure 1 is an overall side view of the riding rice transplanter with the pest control machine connected to the main unit, Figure 2 is a rear view of the same as above, Figure 3 is a side view of the riding rice transplanter, and Figure 4 is the heater 2 on the side of the machine. Figure 5 is a cross-sectional view showing the connected state of the machine side hitch and the work equipment side hitch, Figure 6 is a plan view of the machine, and Figure 7 is an exploded view. Figure 8 is a side view of the machine with a plate connected to the pest control machine, and Figure 8 is a plan view of the same machine as above, Figures 9 and 10.
The figures are side views of an example in which the drug tank can be switched between a position covering the area above the hitch and a position retracted from the vicinity of the hitch. 1... Main machine of rice field work vehicle, 7... Parallel link, 8...
... Hitch on the machine side, 9... Hitch on the work machine side, l7...
- Power sprayer, 20... Chemical tank, H... Hitch part, M... Planting part, S... Pest control machine.