JP2014027900A

JP2014027900A - Chemical spraying vehicle

Info

Publication number: JP2014027900A
Application number: JP2012170105A
Authority: JP
Inventors: Norihiro Yano; 典弘矢野; Masato Nagai; 真人永井; Norihiro Uejima; 徳弘上島
Original assignee: Iseki and Co Ltd; Iseki Agricultural Machinery Mfg Co Ltd
Current assignee: Iseki and Co Ltd; Iseki Agricultural Machinery Mfg Co Ltd
Priority date: 2012-07-31
Filing date: 2012-07-31
Publication date: 2014-02-13
Anticipated expiration: 2032-07-31
Also published as: JP5910398B2; CN203435592U; CN203435593U; CN203435594U

Abstract

PROBLEM TO BE SOLVED: To provide a chemical spraying vehicle of good operability.SOLUTION: The chemical spraying vehicle is obtained by loading on a traveling vehicle body (3) a chemical tank (8) for containing a chemical solution, a spraying device (17) for spraying the chemical solution, and a pump (21) for supplying the chemical solution within the chemical tank (8) to the spraying device (17). There is provided on one side of an operator seat (7) a chemical supply operation unit (19) for supplying the chemical solution within the chemical tank (8) to the spraying device (17), and there is provided on the other side of the operator seat (7) an operation lever (20) for travel gear change.

Description

本発明は、薬液を圃場に散布する薬液散布車両に関する。 The present invention relates to a chemical solution spraying vehicle for spraying a chemical solution to a field.

特許文献１において、ステアリングハンドルの回動中心を挟んで左右方向一側には変速レバーを、他側には前記噴霧管を昇降させるアクチュエータの操作スイッチとサイド噴霧管を回動させるアクチュエータの操作スイッチを設けた乗用自走式噴霧装置が記載されている。 In Patent Document 1, a shift lever is provided on one side in the left-right direction across the center of rotation of the steering handle, and an operation switch for an actuator for moving the spray tube up and down on the other side and an operation switch for an actuator for rotating the side spray tube A self-propelled spray device provided with

特開２００２-２３８３７７号公報JP 2002-238377 A

本発明は、操作性が良い薬液散布車両にすることを課題とする。 This invention makes it a subject to make it a chemical | medical solution dispersion | distribution vehicle with favorable operativity.

本発明は、かかる技術的課題を解決するために次のような技術的手段を講じる。
請求項１記載の発明は、走行車体（３）に薬液を収容する薬液タンク（８）と、薬液を散布する散布装置（１７）と薬液タンク（８）内の薬液を散布装置（１７）へ供給するポンプ（２１）を搭載した薬液散布車両において、運転座席（７）の一側に薬液タンク（８）内の薬液を散布装置（１７）に供給するための薬液供給操作部（１９）を設け、運転座席（７）の他側に走行変速用の操作レバー（２０）を備えたことを特徴とする薬液散布車両とする。 In order to solve this technical problem, the present invention takes the following technical means.
According to the first aspect of the present invention, a chemical tank (8) for storing a chemical in the traveling vehicle body (3), a spraying device (17) for spraying the chemical, and a chemical in the chemical tank (8) to the spraying device (17). In the chemical spray vehicle equipped with the pump (21) to be supplied, the chemical supply operation unit (19) for supplying the chemical in the chemical tank (8) to the spray device (17) is provided on one side of the driver seat (7). Provided is a chemical spray vehicle characterized in that an operation lever (20) for traveling speed change is provided on the other side of the driver seat (7).

請求項２記載の発明は、薬液供給操作部（１９）には、散布装置（１７）へ供給する薬液の圧力を調整する圧力調整弁（３３）の圧力調整具（３３ａ）と、薬液の圧力を表示する圧力計（３２）と、ポンプ（２１）の駆動の入切を操作するポンプ用入切操作レバー（４４）を設けたことを特徴とする請求項１記載の薬液散布車両とする。 According to the second aspect of the present invention, the chemical liquid supply operation section (19) includes a pressure regulator (33a) of a pressure regulating valve (33) for adjusting the pressure of the chemical liquid supplied to the spraying device (17), and the pressure of the chemical liquid. The pressure gauge (32) for displaying the above and a pump on / off operation lever (44) for operating on / off of the drive of the pump (21) are provided.

請求項３記載の発明は、薬液タンク（８）内からポンプ（２１）で汲む薬液が通過する第一薬液通過管（２２）と、ポンプ（２１）により散布装置（１７）に薬液を供給する第二薬液通過管（２３）を設け、第二薬液通過管（２３）を通過する薬液を散布装置（１７）へ供給しないで薬液タンク（８）へ戻す戻し管（３４）を設け、該戻し管（３４）側へ薬液を案内するか、又は散布装置（１７）側へ薬液を案内するかを切り換える戻し管用切換操作具（５０）を薬液供給操作部（１９）に設けたことを特徴とする請求項１又は請求項２記載の薬液散布車両とする。 According to the third aspect of the present invention, the chemical liquid is supplied to the spraying device (17) by the first chemical liquid passage pipe (22) through which the chemical liquid pumped by the pump (21) passes from the chemical liquid tank (8) and the pump (21). A second chemical liquid passage pipe (23) is provided, and a return pipe (34) is provided for returning the chemical liquid passing through the second chemical liquid passage pipe (23) to the chemical liquid tank (8) without supplying the chemical liquid to the spraying device (17). The chemical liquid supply operation section (19) is provided with a return pipe switching operation tool (50) for switching between guiding the chemical liquid to the pipe (34) side or guiding the chemical liquid to the spraying device (17) side. It is set as the chemical | medical solution spraying vehicle of Claim 1 or Claim 2 to do.

請求項４記載の発明は、薬液タンク（８）内からポンプ（２１）で汲む薬液が通過する第一薬液通過管（２２）と、ポンプ（２１）により散布装置に薬液を供給する第二薬液通過管（２３）を設け、第二薬液通過管（２３）を通過する薬液の一部を散布装置（１７）へ供給しないで薬液タンク（８）の底部へ供給する撹拌用管（３５）を設け、該撹拌用管（３５）へ薬液を供給するか否かを切り換える撹拌用管コック（５１）を設け、該撹拌用管コック（５１）を薬液供給操作部（１９）に設けたことを特徴とする請求項１から請求項３いずれか記載の薬液散布車両とする。 The invention according to claim 4 is the first chemical liquid passage pipe (22) through which the chemical liquid pumped from the chemical liquid tank (8) by the pump (21) passes, and the second chemical liquid for supplying the chemical liquid to the spraying device by the pump (21). A passage tube (23) is provided, and a stirring tube (35) for supplying a part of the chemical liquid that passes through the second chemical liquid passage pipe (23) to the bottom of the chemical liquid tank (8) without supplying it to the spraying device (17). A stirring pipe cock (51) for switching whether or not to supply the chemical liquid to the stirring pipe (35) is provided, and the stirring pipe cock (51) is provided in the chemical liquid supply operation section (19). It is set as the chemical | medical solution spraying vehicle in any one of Claims 1-3 characterized by the above-mentioned.

請求項５記載の発明は、エンジン（４）の動力を伝動するミッションケース（３８）を運転座席（７）の前側のフロワ（９）の下方に設け、ポンプ（２１）を運転座席（７）の下方に設け、ミッションケース（３８）内にポンプ（２１）の入り切りをする入切ギア（４１）と、主変速（３９）及び副変速（４０）を設け、該入切ギア（４１）を運転座席（７）の一側にあるポンプ用入切操作レバー（４４）で操作する構成とし、主変速（３９）を操作する主変速レバー（２０ｂ）と副変速（４０）を操作する副変速レバー（２０ａ）を運転座席（７）の他側に備え、主変速レバー（２０ｂ）と副変速レバー（２０ａ）は前後方向に隣接して設けることを特徴とする請求項１から請求項４いずれか記載の薬液散布車両とする。 According to the fifth aspect of the present invention, the transmission case (38) for transmitting the power of the engine (4) is provided below the floor (9) on the front side of the driver seat (7), and the pump (21) is provided in the driver seat (7). Is provided with an on / off gear (41) for turning the pump (21) on and off in the transmission case (38), a main transmission (39) and an auxiliary transmission (40), and the on / off gear (41) is provided. The main shift lever (20b) for operating the main shift (39) and the sub shift for operating the sub shift (40) are configured to be operated by the pump on / off operation lever (44) on one side of the driver seat (7). The lever (20a) is provided on the other side of the driver's seat (7), and the main transmission lever (20b) and the auxiliary transmission lever (20a) are provided adjacent to each other in the front-rear direction. Or a chemical spraying vehicle.

請求項６記載の発明は、運転座席（７）の前方にステアリングハンドル（６）を設け、ステアリングハンドル（６）の前方に操作パネル（１１）を設け、散布装置は左ブーム（１７ｂ）と中ブーム（１７ａ）と右ブーム（１７ｃ）からなるブーム（１７）で構成し、左ブーム（１７ｂ）と右ブーム（１７ｃ）は収納位置と薬液散布位置に姿勢変更可能とし、ブーム（１７）は昇降動作可能とし、操作パネル（１１）にブーム（１７）の昇降動作を行う昇降スイッチ（１３）を設け、ステアリングハンドル（６）の左右一側で、かつ薬液供給操作部（１９）の前方には左ブーム（１７ｂ）を収納位置又は散布位置に操作する左ブーム用操作レバー（５７）と、右ブーム（１７ｃ）を収納位置又は散布位置に操作する右ブーム用操作レバー（５８）を並設することを特徴とする請求項１から請求項５いずれか記載の薬液散布車両とする。 According to the sixth aspect of the present invention, the steering handle (6) is provided in front of the driver seat (7), the operation panel (11) is provided in front of the steering handle (6), and the spraying device includes the left boom (17b) and the middle. The boom (17a) is composed of a boom (17a) and a right boom (17c). The left boom (17b) and the right boom (17c) can be changed in position to a storage position and a chemical spraying position, and the boom (17) is raised and lowered. The operation panel (11) is provided with an elevation switch (13) for raising and lowering the boom (17), on the left and right sides of the steering handle (6) and in front of the chemical supply operation section (19). Left boom operation lever (57) for operating the left boom (17b) to the storage position or spraying position, and right boom operation lever (58) for operating the right boom (17c) to the storage position or spraying position Is referred to as chemical spraying vehicle according to any one of claims 1 to 5, characterized in that the juxtaposed.

請求項１記載の発明により、走行変速レバー（２０）と薬液供給操作部（１９）が運転座席の両脇に隣接してそれぞれ設けることで、運転座席（７）に着座したオペレータは走行変速レバー（２０）と薬液供給操作部（１９）を操作しやすい。 According to the first aspect of the present invention, the travel shift lever (20) and the chemical solution supply operation section (19) are provided adjacent to both sides of the driver seat so that the operator seated on the driver seat (7) can It is easy to operate (20) and the chemical solution supply operation section (19).

請求項２記載の発明により、薬液供給操作部（１９）には、散布装置（１７）へ供給する薬液の圧力を調整する圧力調整弁（３３）の圧力調整具（３３ａ）と、薬液の圧力を表示する圧力計（３２）と、ポンプ（２１）の駆動の入切を操作するポンプ用入切操作レバー（４４）を設けたことで、オペレータは薬液の圧力状態を視認しながら薬液散布作業を行うことができ、またポンプの入り切りがし易い。 According to the second aspect of the present invention, the chemical supply operation section (19) includes the pressure regulator (33a) of the pressure adjustment valve (33) for adjusting the pressure of the chemical supplied to the spraying device (17), and the pressure of the chemical. By providing a pressure gauge (32) for displaying and a pump on / off operation lever (44) for operating on / off of the pump (21), the operator can perform the chemical spraying operation while visually checking the pressure state of the chemical. The pump can be easily turned on and off.

請求項３記載の発明により、ポンプが駆動状態で散布装置（１７）への薬液散布を一時的に停止ができる。また、一旦停止視した薬液散布を迅速に再開できる。さらに、走行中に戻し管用切換操作具（５０）を操作可能なので、操作しやすい。 According to the third aspect of the present invention, it is possible to temporarily stop the spraying of the chemical liquid to the spraying device (17) while the pump is in a driving state. In addition, it is possible to quickly resume the chemical spraying once stopped. Further, since the return pipe switching operation tool (50) can be operated during traveling, it is easy to operate.

請求項４記載の発明により、薬液散布作業時は、薬液の一部を薬液タンク（８）の底部へ供給することで、薬液タンク（８）内の薬液に拡散作用を与えて薬液の濃度を一定にすることができる。また、薬液散布作業中に薬液タンク（８）内の薬液が少量になると、撹拌用管コック（５１）を撹拌用管（３５）が閉じ側になるように操作して、撹拌用管（３５）への薬液の供給を停止し、散布装置（１７）へ供給する。そのため、薬液タンク（８）内の薬液が無くなる手前まで安定した圧力の薬液を散布装置（１７）へ供給することができる。 According to the fourth aspect of the present invention, at the time of the chemical solution spraying operation, by supplying a part of the chemical solution to the bottom of the chemical solution tank (8), the chemical solution in the chemical solution tank (8) is given a diffusing action to thereby adjust the concentration of the chemical solution Can be constant. Further, when the amount of the chemical solution in the chemical solution tank (8) becomes small during the chemical solution spraying operation, the stirring tube cock (51) is operated so that the stirring tube (35) is closed, and the stirring tube (35 ) Is stopped and supplied to the spraying device (17). Therefore, the chemical solution with a stable pressure can be supplied to the spraying device (17) just before the chemical solution in the chemical solution tank (8) runs out.

請求項５記載の発明より、運転座席（７）を挟んで左右一側にポンプ用入切操作レバー（４４）を備え、左右他側に主変速レバー（２０ｂ）及び副変速レバー（２０ａ）を備えることができるので操作性が良好になる。 According to the fifth aspect of the present invention, a pump on / off operation lever (44) is provided on one side of the left and right sides of the driver seat (7), and a main transmission lever (20b) and a sub transmission lever (20a) are provided on the left and right sides. Since it can be provided, operability is improved.

請求項６記載の発明により、運転座席（７）の左右一側に走行用の変速レバー（２０）を設け、左右他側に薬液供給操作部（１９）を設け、運転座席（７）の前側のステアリングハンドル（６）の近傍に昇降スイッチ（１３）と、左ブーム用操作レバー（５７）及び右ブーム用操作レバー（５８）を設けることで、操作性が良くなる。 According to the sixth aspect of the present invention, the shifting lever (20) for traveling is provided on the left and right sides of the driver seat (7), the chemical liquid supply operation section (19) is provided on the left and right sides, and the front side of the driver seat (7). By providing the lift switch (13), the left boom operation lever (57), and the right boom operation lever (58) in the vicinity of the steering handle (6), the operability is improved.

薬液散布車両の正面図Front view of chemical spray vehicle 薬液散布車両の側面図Side view of chemical spray vehicle 薬液散布車両の背面図Rear view of chemical spray vehicle 薬液散布車両の平面図Top view of chemical spray vehicle ポンプ駆動の伝動構成を示す図Diagram showing pump drive transmission configuration 薬液散布配管を示す図Diagram showing chemical spray pipe 正面から見た薬液散布作業を示す図Diagram showing chemical spraying work as seen from the front ミッションケースの内部を示す図Diagram showing the inside of the mission case 側面から見た昇降リンクの周辺の拡大図Enlarged view of the periphery of the lifting link as seen from the side 平面から見た薬液供給操作部の周辺の拡大図Enlarged view of the area around the chemical supply operation section seen from the plane 平面から見た畦際での旋回動作を説明する図The figure explaining the turning action in the shore when seen from the plane

本発明の実施の形態の薬液散布車両について、以下説明する。本実施の形態では車両の進行方向側を前側と呼ぶ。
左右一対の前輪１と後輪２とを備える走行車体３の前側にはエンジン４を内装するボンネット５を設ける。ボンネット５の後方にはステアリングハンドル６を設け、ステアリングハンドル６の後方には運転座席７を設ける。運転座席７の後方には薬液を収容する薬液タンク８を設ける。ステアリングハンドル６の下方にはフロワ９を設け、フロワ９の左右一側にはオペレータが乗降するステップ１０を設けている。ステップ１０の内側には燃料タンク６７を設け、燃料タンク６７はフロワ９の左右一側の下方に取付けている。ボンネット５の一側にはバッテリ７３を露出して設けている。薬液タンク８の後方には架台７５を設け、架台７５にはオペレータの手を洗浄する水を収容するためのポリタンク７６を搭載している。 The chemical solution spraying vehicle according to the embodiment of the present invention will be described below. In the present embodiment, the traveling direction side of the vehicle is referred to as the front side.
A bonnet 5 that houses an engine 4 is provided on the front side of a traveling vehicle body 3 that includes a pair of left and right front wheels 1 and a rear wheel 2. A steering handle 6 is provided behind the bonnet 5, and a driver seat 7 is provided behind the steering handle 6. A chemical solution tank 8 for storing a chemical solution is provided behind the driver seat 7. A floor 9 is provided below the steering handle 6, and a step 10 on which the operator gets on and off is provided on the left and right sides of the floor 9. A fuel tank 67 is provided inside the step 10, and the fuel tank 67 is attached below the left and right sides of the floor 9. A battery 73 is exposed on one side of the bonnet 5. A gantry 75 is provided behind the chemical liquid tank 8, and a poly tank 76 is mounted on the gantry 75 to store water for washing the hands of the operator.

ステアリングハンドル６の前方には、操作パネル１１を設け、スピードメータ１２、昇降シリンダ１５を伸縮させて昇降リンク１６を昇降させる昇降スイッチ１３、エンジン始動スイッチ１４を設けている。 An operation panel 11 is provided in front of the steering handle 6, and a speedometer 12, an elevating switch 13 that elevates the elevating link 16 by extending and retracting the elevating cylinder 15, and an engine start switch 14 are provided.

ボンネット５の前側には油圧又は電動の昇降シリンダ１５で昇降する昇降リンク１６を設け、昇降リンク１６の前部には薬液を散布する散布装置、すなわちブーム１７を取付けている。ブーム１７は走行車体３の前側にある中ブーム１７ａと、散布時に走行車体３の左右両側に広がる左ブーム１７ｂと右ブーム１７ｃとを備え、中ブーム１７ａ、右ブーム１７ｃ、左ブーム１７ｂにはそれぞれ薬液を噴霧する多数のノズル１８を取付けている。右ブーム１７ｃと左ブーム１７ｂは非散布時、すなわち走行時には走行車体３の左右両側に後上がり傾斜姿勢とし、ブーム受け、すなわち前ブーム受け５２と後ブーム受け５４で受けられて収納姿勢となるようにしている。 A lifting link 16 that is lifted and lowered by a hydraulic or electric lifting cylinder 15 is provided on the front side of the bonnet 5, and a spraying device for spraying a chemical solution, that is, a boom 17 is attached to the front portion of the lifting link 16. The boom 17 includes a middle boom 17a on the front side of the traveling vehicle body 3, a left boom 17b and a right boom 17c that spread on both the left and right sides of the traveling vehicle body 3 when sprayed, and each of the middle boom 17a, the right boom 17c, and the left boom 17b includes A number of nozzles 18 for spraying a chemical solution are attached. The right boom 17c and the left boom 17b are in a rear-upward inclined posture on the left and right sides of the traveling vehicle body 3 when not sprayed, that is, when traveling, and are received by the boom receiver, that is, the front boom receiver 52 and the rear boom receiver 54, and are in the storage attitude. I have to.

運転座席７の左右一側には薬液タンク８内の薬液をブーム１７に供給するための操作を行うための各種操作具を設ける薬液供給操作部１９を設け、運転座席７の左右他側には、走行用の変速レバー２０を設けている。本実施の形態の走行用の変速レバー２０では、前側に主変速レバー２０ｂ、後側に副変速レバー２０ａを隣接して配置し、それぞれ前後方向に操作する構成である。 On the left and right sides of the driver seat 7, there is provided a chemical solution supply operation unit 19 for providing various operation tools for performing operations for supplying the chemical solution in the chemical solution tank 8 to the boom 17. A shift lever 20 for traveling is provided. The traveling speed change lever 20 of the present embodiment has a configuration in which a main speed change lever 20b is disposed adjacent to the front side and a sub speed change lever 20a is disposed adjacent to the rear side and operated in the front-rear direction.

ステアリングハンドル６の左右一側で、かつ薬液供給操作部１９の前方には左ブーム１７ｂを収納位置又は散布位置に操作する左ブーム用操作レバー５７と、右ブーム１７ｃを収納位置又は散布位置に操作する右ブーム用操作レバー５８を並設している。左ブーム用操作レバー５７と左ブーム１７ｂを左ブーム用操作ワイヤー７０で連結し、右ブーム用操作レバーと右ブーム１７ｃを右ブーム用操作ワイヤー７１で連結する。 On the left and right sides of the steering handle 6 and in front of the chemical supply operation unit 19, the left boom operating lever 57 for operating the left boom 17b to the storage position or the spraying position and the right boom 17c to the storage position or the spraying position are operated. The right boom operation lever 58 is arranged side by side. The left boom operation lever 57 and the left boom 17 b are connected by a left boom operation wire 70, and the right boom operation lever and the right boom 17 c are connected by a right boom operation wire 71.

次に、薬液供給回路について説明する。
薬液タンク８内の薬液を汲むポンプ２１は、薬液タンク８の底部に接続する第一薬液通過管２２と連通する。第一薬液通過管２２の途中には薬液に混じる異物を除去するフィルタ２４及び薬液をポンプ２１側に供給するか又は機外に排出するかを切り換える機外排出用切換弁２５を設ける。ポンプ２１には第二薬液通過管２３を連結し、第二薬液通過管２３から左ブーム用管２６・中ブーム用管２７・右ブーム用管２８に分岐する構成である。左ブーム用管２６・中ブーム用管２７・右ブーム用管２８にはそれぞれ左ブーム用コック２９・中ブーム用コック３０・右ブーム用コック３１を設け、左ブーム１７ｂ・中ブーム１７ａ・右ブーム１７ｃそれぞれに薬液を供給したり、供給を停止することを操作できる。また、第二薬液通過管２３内の薬液の圧力を計測して表示する圧力計３２と、薬液の圧力を調整する圧力調整弁３３を設ける。 Next, the chemical solution supply circuit will be described.
A pump 21 that draws the chemical solution in the chemical solution tank 8 communicates with a first chemical solution passage pipe 22 connected to the bottom of the chemical solution tank 8. In the middle of the first chemical liquid passage tube 22, a filter 24 for removing foreign substances mixed in the chemical liquid and an out-of-machine discharge switching valve 25 for switching whether the chemical liquid is supplied to the pump 21 side or discharged outside the apparatus are provided. A second chemical liquid passage pipe 23 is connected to the pump 21 and branches from the second chemical liquid passage pipe 23 into a left boom pipe 26, a middle boom pipe 27, and a right boom pipe 28. The left boom pipe 26, the middle boom pipe 27, and the right boom pipe 28 are provided with a left boom cock 29, a middle boom cock 30, and a right boom cock 31, respectively, and a left boom 17b, a middle boom 17a, and a right boom. It is possible to operate to supply the chemical solution to each 17c or to stop the supply. In addition, a pressure gauge 32 that measures and displays the pressure of the chemical solution in the second chemical solution passage pipe 23 and a pressure adjustment valve 33 that adjusts the pressure of the chemical solution are provided.

第二薬液通過管２３は、圧力調整弁３３を通過しないで薬液タンク８へ薬液を戻す戻し管３４と、薬液散布作業中に薬液タンク８の底部に薬液を戻すことで薬液タンク８内の薬液に撹拌作用を与えて薬液の濃度を一定にする撹拌用管３５と、圧力調整弁３３の調整により余剰の薬液を薬液タンク８に戻す余剰薬液用管３６をそれぞれ連通している。 The second chemical liquid passage pipe 23 returns the chemical liquid to the chemical liquid tank 8 without passing through the pressure adjusting valve 33, and the chemical liquid in the chemical liquid tank 8 by returning the chemical liquid to the bottom of the chemical liquid tank 8 during the chemical liquid spraying operation. An agitating tube 35 that applies a stirring action to make the concentration of the medicinal solution constant and an excess medicinal solution tube 36 that returns the surplus medicinal solution to the medicinal solution tank 8 by adjusting the pressure adjusting valve 33 are communicated with each other.

戻し管３４と第二薬液通過管２３は戻し管用切換コック５０を介して連通し、撹拌用管３５と第二薬液通過管２３は撹拌用コック５１を介して連通し、余剰薬液用管３６と第二薬液通過管２３は圧力調整弁３３を介して連通する構成である。 The return pipe 34 and the second chemical liquid passage pipe 23 communicate with each other via a return pipe switching cock 50, and the stirring pipe 35 and the second chemical liquid passage pipe 23 communicate with each other via a stirring cock 51, The second chemical liquid passage tube 23 is configured to communicate with the pressure adjustment valve 33.

次に、ミッションケース３８について説明する。
前後方向に延びる入力軸４２の上手側にクラッチ３７を設け、クラッチペダル５６の操作で入り切りする構成である。入力軸４２の上手側にエンジン４からの動力が伝動する構成である。入力軸の下手側には主変速３９及び副変速４０用のギア、及びポンプ２１の入切ギア４１を設ける。そして、入力軸４２の下手側のミッションケース３８を貫通してミッションケース外に突出する部分にはポンプ２１の伝動用プーリ４３を取付け、ポンプ２１の入力用プーリ４８とベルトで伝動する構成である。ポンプ２１の入切ギア４１をシフタ４６を介してポンプ用入切操作レバー４４で操作する構成としている。ミッションケース３８は運転座席７の前側のフロワ９の左右中央部の下方でかつ燃料タンク６７の側方に配置し、ポンプ２１は運転座席７の下方に設ける。そして、ポンプ用入切操作レバー４４を運転座席７の一側に設けることで、ポンプ用入切操作レバー４４と入力軸４２の下手側にある入切ギア４１を接近して設けることができるため、構成を簡単にすることができる。 Next, the mission case 38 will be described.
The clutch 37 is provided on the upper side of the input shaft 42 extending in the front-rear direction, and is turned on and off by operating the clutch pedal 56. The power from the engine 4 is transmitted to the upper side of the input shaft 42. On the lower side of the input shaft, a gear for the main transmission 39 and the auxiliary transmission 40 and an on / off gear 41 for the pump 21 are provided. A transmission pulley 43 of the pump 21 is attached to a portion that penetrates the transmission case 38 on the lower side of the input shaft 42 and protrudes out of the transmission case, and is transmitted by a belt with the input pulley 48 of the pump 21. . The on / off gear 41 of the pump 21 is operated by a pump on / off operation lever 44 via a shifter 46. The mission case 38 is disposed below the left and right central portions of the floor 9 on the front side of the driver seat 7 and on the side of the fuel tank 67, and the pump 21 is provided below the driver seat 7. Since the pump on / off operation lever 44 is provided on one side of the driver's seat 7, the pump on / off operation lever 44 and the on / off gear 41 on the lower side of the input shaft 42 can be provided close to each other. The configuration can be simplified.

走行軸４５は、入力軸４２から伝動する構成としている。４７はブレーキであり、フロワのブレーキペダル４９で操作される。
薬液供給操作部１９の詳細について説明する。 The traveling shaft 45 is configured to be transmitted from the input shaft 42. A brake 47 is operated by a brake pedal 49 of the floor.
Details of the chemical solution supply operation unit 19 will be described.

薬液供給操作部１９の上面側には戻し管用切換コック５０と、撹拌管用コック５１と圧力調整弁３３の圧力調整ダイヤル３３ａと、ポンプ用入切操作レバー４４と、圧力計３２を設けている。また、薬液供給操作部１９の前面側には左ブーム用コック２９・中ブーム用コック３０・右ブーム用コック３１を並設している。 A return pipe switching cock 50, a stirring pipe cock 51, a pressure adjustment dial 33 a of the pressure adjustment valve 33, a pump on / off operation lever 44, and a pressure gauge 32 are provided on the upper surface side of the chemical liquid supply operation unit 19. Further, a left boom cock 29, a middle boom cock 30, and a right boom cock 31 are juxtaposed on the front side of the chemical solution supply operation unit 19.

次に、左ブーム用１７ｂ及び右ブーム１７ｃをそれぞれ受ける左右一対のブーム受けの構成について説明する。
前ブーム受け５２は、昇降リンク１６を支持するリンク支持部材５３に取付ける取付け軸５２ａと、取付軸５２ａから延びて湾曲する形状の軸で形成する湾曲軸５２ｂと、湾曲軸５２ｂから延びて二股状に形成する受け体５２ｃで形成する。受け体５２ｃは前輪１の上方に位置している。 Next, the configuration of a pair of left and right boom receivers that respectively receive the left boom 17b and the right boom 17c will be described.
The front boom receiver 52 has an attachment shaft 52a attached to the link support member 53 that supports the elevating link 16, a curved shaft 52b formed from a curved shape extending from the attachment shaft 52a, and a bifurcated shape extending from the curved shaft 52b. It is formed with the receiving body 52c formed in this. The receiving body 52 c is located above the front wheel 1.

後ブーム受け５４は、薬液タンク８の背面上部に対向する位置で左右方向に延びる後ブーム取付軸５４ａと、後ブーム取付軸５４ａから薬液タンク８の左右外側に向かって延びる延長軸部５４ｂと、左右の延長軸部５４ｂの先端部を二股状に形成する受け体５４ｃで形成する。そして、後ブーム取付軸５４ａは薬液タンク８の背面に取り付け具５５により着脱可能に構成している。 The rear boom receiver 54 has a rear boom mounting shaft 54a extending in the left-right direction at a position facing the upper back of the chemical liquid tank 8, an extension shaft portion 54b extending from the rear boom mounting shaft 54a toward the left and right outer sides of the chemical liquid tank 8, The distal end portions of the left and right extension shaft portions 54b are formed by a receiving body 54c formed in a bifurcated shape. The rear boom mounting shaft 54 a is configured to be detachable from the back surface of the chemical liquid tank 8 by a mounting tool 55.

この後ブーム受け５４の構成によると、左右の延長軸部５４ｂの長さを短くすることができるため、走行時の振動を小さくすることができ、ブームを破損させ難くすることができる。 Thereafter, according to the configuration of the boom receiver 54, the length of the left and right extension shaft portions 54b can be shortened, so that vibration during traveling can be reduced and the boom can be made difficult to break.

次に、薬液散布車両による薬液散布作業について説明する。
オペレータが運転座席７に着座し、エンジン始動スイッチ１４を操作するとエンジン４の駆動が開始する。クラッチペダル５６を踏みながら走行変速レバー２０を操作すると走行する。圃場に入って、薬液散布位置で左ブーム用操作レバー５７及び右ブーム用操作レバー５８を操作し、左ブーム１７ｂと右ブーム１７ｃを走行車体３の左右両側に広げて散布姿勢とする。また、昇降スイッチ１３を操作してブーム１７を作物の高さに応じた位置とする。そして、クラッチペダル５６を踏みながらポンプ入切操作レバー４４を操作し、入切ギア４１を入り側に操作すると、ポンプ２１が駆動を開始し、薬液がブーム１７のノズル１８から散布される。圃場を走行しながら薬液を散布するが、オペレータはスピードメータ１２と圧力計３２を視認しながら、車速に応じた圧力で散布するように運転することで、単位面積に対して均一の薬液を散布する。 Next, the chemical spraying operation by the chemical spray vehicle will be described.
When the operator sits on the driver's seat 7 and operates the engine start switch 14, the engine 4 starts to be driven. When the traveling speed change lever 20 is operated while the clutch pedal 56 is depressed, the vehicle travels. Entering the field, the left boom operating lever 57 and the right boom operating lever 58 are operated at the chemical spraying position, and the left boom 17b and the right boom 17c are spread to the left and right sides of the traveling vehicle body 3 to be in a spraying posture. Moreover, the raising / lowering switch 13 is operated and the boom 17 is made into the position according to the height of the crop. When the pump on / off operation lever 44 is operated while the clutch pedal 56 is depressed and the on / off gear 41 is operated to the on side, the pump 21 starts to be driven and the chemical liquid is sprayed from the nozzle 18 of the boom 17. The operator sprays the chemical solution while traveling on the field. The operator operates the sprayer at a pressure corresponding to the vehicle speed while visually checking the speedometer 12 and the pressure gauge 32, thereby spraying a uniform chemical solution on the unit area. To do.

圃場の畦際まで薬液を散布しながら走行し、畦際で旋回するときには、旋回外側となるブームのコック（図１１では右ブーム用コック３１）を供給停止側に操作する。すなわち、旋回内側の左ブーム１７ｂと中ブーム１７ａは薬液の散布を行いながら旋回することで、未散布となる領域がでることを防止し、圃場全体に満遍なく薬液を散布することが可能となる。そして、旋回外側の右ブーム１７ｃは薬液散布を停止することで、畦際に薬液を散布することを防止できる。旋回時には旋回外側のブームを非散布姿勢に上昇させる操作を行うことで畦際にブームが当接するのを防止しても良い。 When the vehicle travels while spraying chemicals to the edge of the field and turns at the edge of the farm, the boom cock (the right boom cock 31 in FIG. 11) on the outside of the turn is operated to the supply stop side. That is, the left boom 17b and the middle boom 17a on the inside of the turn turn while spraying the chemical solution, thereby preventing an unsprayed area from appearing and spreading the chemical solution evenly over the entire field. And the right boom 17c of the turning outer side can prevent spraying a chemical liquid at the time of dripping by stopping the chemical liquid spraying. During turning, the boom on the outside of the turning may be raised to a non-spraying posture to prevent the boom from coming into contact with the saddle.

次に、戻し管用切換コック５０と、撹拌用管コック５１それぞれの役割について説明する。
戻し管用切換コック５０は、薬液散布時には戻し管３４側を閉鎖している。そして、薬液散布を一時停止するときに、戻し管３４側が開になるように切換操作することで、第一薬液通過管２３内を通過する薬液をブーム１７側に供給しないで戻し管３４から薬液タンク８に戻る。すなわち、ポンプ２１の駆動を継続した状態で薬液の散布を一時停止するときに利用する。ポンプ入切操作レバー４４でポンプ２１の駆動を停止して薬液散布を停止することも可能であるが、ポンプ入切操作レバー４４はクラッチペダル５６を踏みながら操作を行う必要があるので操作が煩わしく、しかも走行停止中しか操作できないのに対し、戻し管用切換コック５０はコックの操作により操作できるので操作が簡単で、しかも、走行中も操作可能であるというメリットがある。 Next, the roles of the return pipe switching cock 50 and the stirring pipe cock 51 will be described.
The return pipe switching cock 50 closes the return pipe 34 when spraying the chemical solution. Then, when the spraying of the chemical liquid is temporarily stopped, the chemical liquid passing through the first chemical liquid passage pipe 23 is not supplied to the boom 17 side by switching operation so that the return pipe 34 side is opened. Return to tank 8. That is, it is used when the spraying of the chemical liquid is temporarily stopped while the pump 21 is continuously driven. The pump on / off operation lever 44 can stop the driving of the pump 21 to stop the spraying of the chemical solution. However, since the pump on / off operation lever 44 needs to be operated while the clutch pedal 56 is depressed, the operation is troublesome. In addition, the return pipe switching cock 50 can be operated only when the traveling is stopped. However, since the return cock switching cock 50 can be operated by operating the cock, there is an advantage that the operation can be easily performed while traveling.

撹拌用管コック５１は、薬液散布状態では撹拌用管３５側を開状態としている。すなわち、薬液をブーム１７側に供給すると共に、薬液の一部を撹拌用管３５に供給している。すると、撹拌用管３５から薬液タンク８の底部に戻る薬液が、薬液タンク８内の薬液に撹拌作用を与え、薬液タンク８内の薬液の濃度を一定にすることができる。薬液散布作業中に薬液タンク８内の薬液が少量になると、撹拌用管コック５１を撹拌用管３５が閉じ側になるように操作することで、薬液タンクからの薬液が全てブーム１７に供給するため、薬液が無くなる手前まで薬液の圧力を保つことができる。薬液タンク８内の薬液量は、薬液タンク８の正面側に設ける液面計をオペレータが視認して確認する。 The stirring tube cock 51 opens the stirring tube 35 side in the chemical solution spraying state. That is, the chemical solution is supplied to the boom 17 side and a part of the chemical solution is supplied to the stirring tube 35. Then, the chemical liquid that returns from the stirring tube 35 to the bottom of the chemical liquid tank 8 gives a stirring action to the chemical liquid in the chemical liquid tank 8, and the concentration of the chemical liquid in the chemical liquid tank 8 can be made constant. When the chemical solution in the chemical solution tank 8 becomes small during the chemical solution spraying operation, all the chemical solution from the chemical solution tank is supplied to the boom 17 by operating the stirring tube cock 51 so that the stirring tube 35 is closed. Therefore, the pressure of the chemical solution can be maintained until the chemical solution is exhausted. The amount of the chemical liquid in the chemical liquid tank 8 is confirmed by an operator visually confirming a liquid level gauge provided on the front side of the chemical liquid tank 8.

次に、昇降リンク位置決めプレート６５の構成について説明する。
昇降リンク位置決めプレート６５は、ブーム１７をブーム受け（５２，５４）に収納姿勢にした状態での走行による振動で昇降リンク１６が揺動するのを低減することで、ブーム１７のハンチングによるブーム受け（５２，５４）との衝突を低減するためのものである。昇降リンク位置決めプレート６５は一対のプレート６５ａを昇降リンク１６を挟んでボルト６５ｂで締め、ボルト６５ｂにそれぞれに遊転するローラを６５ｃ取付けることで構成される。そしてローラ６５ｃの作用で昇降リンク位置決めプレート６５が昇降リンク１６に沿ってスライドする。また、昇降リンク位置決めプレート６５の後部にフック６５ｄを設け、下部にＶ字型ステー６５ｅを設けている。 Next, the configuration of the lift link positioning plate 65 will be described.
The lifting link positioning plate 65 reduces the swinging of the lifting link 16 due to the vibration caused by the traveling in the state where the boom 17 is stored in the boom receiver (52, 54). This is to reduce the collision with (52, 54). The elevating link positioning plate 65 is configured by fastening a pair of plates 65a with bolts 65b with the elevating link 16 interposed therebetween, and attaching rollers 65c to the bolts 65b. The lift link positioning plate 65 slides along the lift link 16 by the action of the roller 65c. Further, a hook 65d is provided at the rear part of the lift link positioning plate 65, and a V-shaped stay 65e is provided at the lower part.

薬液散布作業時には、昇降リンク位置決めプレート６５をスライドし、昇降リンク１６の基部側に設けるハンガー６６にフック６５ｄを取付けることで昇降リンク位置決めプレート６５は位置固定される。そして、昇降リンク１６の昇降動作にかかわらず位置固定した状態を保つ。 At the time of the chemical spraying operation, the elevating link positioning plate 65 is slid, and the position of the elevating link positioning plate 65 is fixed by attaching the hook 65d to the hanger 66 provided on the base side of the elevating link 16. And the state where the position was fixed irrespective of the raising / lowering operation | movement of the raising / lowering link 16 is maintained.

ブーム１７を前ブーム受け５２及び後ブーム受け５４に収納した場合に、フック６５ｄをハンガー６６から外して昇降リンク位置決めプレート６５を昇降リンク１６に形成する位置決めピン６７に当接するまで摺動させる。そして、走行車体３のバンパー６８から左右方向に延びる位置決め用シャフト６９上にＶ字型ステーを載置する。すると、昇降リンク１６はＶ字型ステーの作用で位置が定まり、走行中の振動に伴う昇降リンクの揺動が小さくなる。そのため、ブーム１７の揺動も小さくなり、ブーム受け５２，５４との衝突が小さくなり、破損等を防止できる。 When the boom 17 is housed in the front boom receiver 52 and the rear boom receiver 54, the hook 65d is removed from the hanger 66, and the lifting link positioning plate 65 is slid until it comes into contact with the positioning pin 67 formed on the lifting link 16. Then, a V-shaped stay is placed on a positioning shaft 69 extending in the left-right direction from the bumper 68 of the traveling vehicle body 3. Then, the position of the elevating link 16 is determined by the action of the V-shaped stay, and the swinging of the elevating link due to vibration during traveling is reduced. Therefore, the swing of the boom 17 is also reduced, the collision with the boom receivers 52 and 54 is reduced, and damage or the like can be prevented.

なお、昇降リンク位置決めプレート６５と位置決め用シャフト６９は、全体図においては平面図（図４)に図示しているが、正面図（図１）においては省略している。
次に、薬液散布作業後に薬液タンク８内に残留する少量の薬液の機外取り出し作業について説明する。 The lifting link positioning plate 65 and the positioning shaft 69 are shown in a plan view (FIG. 4) in the overall view, but are omitted in the front view (FIG. 1).
Next, an operation for taking out a small amount of chemical solution remaining in the chemical solution tank 8 after the chemical solution spraying operation will be described.

まず、機外排出用切換弁２５の機外排出側に設けるキャップ７２を外し、機外排出用切換弁２５を薬液供給側から機外排出側に切り換える。すると、薬液タンク８の底部から薬液が流下し、機外に排出する。従来は、薬液タンクの底部にドレンを設け、ドレンから薬液を排出する構成であったが、ドレンを開口する際に、薬液がオペレータの手に付着する場合があった。本実施の形態の構成により、薬液がオペレータの手に付着することが無く、安全に薬液排出を行うことができる。 First, the cap 72 provided on the outside discharge side of the outside discharge switching valve 25 is removed, and the outside discharge switching valve 25 is switched from the chemical solution supply side to the outside discharge side. Then, the chemical solution flows down from the bottom of the chemical solution tank 8 and is discharged outside the apparatus. Conventionally, the drain is provided at the bottom of the chemical tank and the chemical is discharged from the drain. However, when the drain is opened, the chemical may adhere to the operator's hand. With the configuration of the present embodiment, the chemical solution does not adhere to the operator's hand, and the chemical solution can be discharged safely.

次に薬液タンク８に河川等の水源から水を供給するための取水装置８０について説明する。通常、薬液は原液に水を加えることで希釈化して散布用の薬液としている。そのため、水源から多量の水を迅速に供給する場合に取水装置を取付け、取水作業を行う。 Next, a water intake device 80 for supplying water from a water source such as a river to the chemical tank 8 will be described. Usually, the chemical solution is diluted by adding water to the stock solution to form a chemical solution for spraying. Therefore, when a large amount of water is quickly supplied from the water source, a water intake device is attached and the water intake operation is performed.

取水装置４０は水源から取水するタービン（図示せず）を内蔵する取水部８１と、取水用第一管８２と、取水部８１から取水した水が通過する取水用第二管８３から構成している。 The water intake device 40 is composed of a water intake part 81 containing a turbine (not shown) for taking water from a water source, a water intake first pipe 82, and a water intake second pipe 83 through which water taken from the water intake part 81 passes. Yes.

取水作業時に取水用第一管８２を薬液タンク８の左右一側に設ける撹拌用管３５に設ける切換部８４に連結し、取水部８１を水源に投入し、取水用第二管８３を薬液タンク８の開閉蓋８ａを開けて薬液タンク８内に挿入する。そして、ポンプ２１を駆動し、切換バルブ８５を操作し、取水用第一管８２と撹拌用管３５を連通させると、駆動するポンプ２１の空気が撹拌用管３５から取水用第一管８２を経て取水部８１に供給され、取水部８１のタービンが駆動する。すると、水源から汲み上げられた水が取水用第二管８３を通過し、薬液タンク８内に給水される。 At the time of water intake, the water intake first pipe 82 is connected to the switching portion 84 provided on the stirring pipe 35 provided on the left and right sides of the chemical liquid tank 8, the water intake portion 81 is introduced into the water source, and the water intake second pipe 83 is connected to the chemical liquid tank. 8 is opened and inserted into the chemical tank 8. When the pump 21 is driven, the switching valve 85 is operated, and the first intake water pipe 82 and the agitation pipe 35 are communicated with each other, the air of the driven pump 21 passes through the first intake water pipe 82 from the agitation pipe 35. Then, the water is supplied to the water intake unit 81 and the turbine of the water intake unit 81 is driven. Then, the water pumped up from the water source passes through the second water intake pipe 83 and is supplied into the chemical tank 8.

取水作業の別の実施の形態について説明する。
薬液タンク８内に若干の水をあらかじめ収容しておき、切換バルブ８５を操作し、取水用第一管８２と撹拌用管３５を連通させ、ポンプ２１を駆動を開始する。すると、薬液タンク８内の水がポンプ２１で吸引され、ポンプ２１から第二薬液通過管２３から撹拌用管３５を経た水が取水用第一管８２を通過し、取水部８１に供給され、水力でタービンが駆動を開始する。以後、ポンプ２１は薬液タンク８内から水を吸引して取水部４１に水を供給しながら、取水部８１から水を汲み上げて薬液タンク８内に水を給水する。すなわち、ポンプ２１から取水部８１に供給される水量よりも、取水部８１から汲み上げられる水量を多くすることで薬液タンク８内の水量が増加する。 Another embodiment of the water intake operation will be described.
Some water is stored in the chemical tank 8 in advance, the switching valve 85 is operated, the first water intake pipe 82 and the agitation pipe 35 are communicated, and the pump 21 is started to be driven. Then, the water in the chemical liquid tank 8 is sucked by the pump 21, and the water that has passed through the stirring pipe 35 from the second chemical liquid passage pipe 23 passes through the first water intake pipe 82 from the pump 21 and is supplied to the water intake section 81, Turbine starts to be driven by hydraulic power. Thereafter, the pump 21 sucks water from the chemical liquid tank 8 and supplies water to the water intake section 41, while pumping up water from the water intake section 81 and supplying water to the chemical liquid tank 8. That is, the amount of water in the chemical solution tank 8 is increased by increasing the amount of water pumped from the water intake unit 81 than the amount of water supplied from the pump 21 to the water intake unit 81.

３走行車体
４エンジン
６ステアリングハンドル
７運転座席
８薬液タンク
９フロワ
１３昇降スイッチ
１５昇降シリンダ
１６昇降リンク
１７散布装置（ブーム）
１７ａ中ブーム
１７ｂ左ブーム
１７ｃ右ブーム
１９薬液供給操作部
２０走行変速用の操作レバー（主変速レバー２０ｂ及び副変速レバー２０ａ）
２１ポンプ
２２第一薬液通過管
２３第二薬液通過管
３２圧力計
３３圧力調整弁（
３３ａ圧力調整具（３３ａ）
３４戻し管
３５撹拌用管
３８ミッションケース
３９主変速
４０副変速
４１入切ギア
４４ポンプ用入切操作レバー
５０戻し管用切換操作具（戻し管用切換コック）
５１撹拌用管コック
５７左ブーム用操作レバー
５８右ブーム用操作レバー DESCRIPTION OF SYMBOLS 3 Traveling vehicle body 4 Engine 6 Steering handle 7 Driver's seat 8 Chemical liquid tank 9 Flower 13 Lift switch 15 Lift cylinder 16 Lift link 17 Spraying device (boom)
17a Middle boom 17b Left boom 17c Right boom 19 Chemical solution supply operation part 20 Operation levers for shifting gears (main transmission lever 20b and auxiliary transmission lever 20a)
21 Pump 22 First chemical solution passage tube 23 Second chemical solution passage tube 32 Pressure gauge 33 Pressure adjustment valve (
33a Pressure adjuster (33a)
34 Return pipe 35 Stirring pipe 38 Mission case 39 Main speed change 40 Sub speed change 41 On / off gear 44 Pump on / off operation lever 50 Return pipe switching operation tool (return pipe switching cock)
51 Stirring tube cock 57 Left boom operation lever 58 Right boom operation lever

Claims

In a chemical spray vehicle equipped with a chemical tank that stores chemicals in a traveling vehicle body, a spraying device that sprays chemicals, and a pump that supplies the chemicals in the chemical tanks to the spraying device, the chemicals in the chemical tank are placed on one side of the driver's seat. A chemical spray vehicle comprising a chemical supply operation section for supplying to a spraying device and having an operation lever for traveling speed change on the other side of a driver seat.

The chemical supply operation section includes a pressure regulator that adjusts the pressure of the chemical supplied to the spraying device, a pressure gauge that displays the pressure of the chemical, and a pump on / off operation that turns the pump on and off. The chemical solution spraying vehicle according to claim 1, further comprising a lever.

A first chemical liquid passage pipe through which chemical liquid pumped from the chemical liquid tank passes and a second chemical liquid passage pipe for supplying chemical liquid to the spraying device by the pump are provided.
For return pipes that provide a return pipe that returns to the chemical tank without supplying the chemical liquid that passes through the second chemical liquid passage pipe to the spraying apparatus, and switches between guiding the chemical liquid to the return pipe side or guiding the chemical liquid to the spraying apparatus side The chemical solution spraying vehicle according to claim 1 or 2, wherein a switching operation tool is provided in the chemical solution supply operation section.

A first chemical liquid passage pipe through which chemical liquid pumped from the chemical liquid tank passes and a second chemical liquid passage pipe for supplying chemical liquid to the spraying device by the pump are provided.
A stirring pipe cock for switching whether or not to supply chemical liquid to the stirring pipe provided with a stirring pipe for supplying a part of the chemical liquid passing through the second chemical liquid passage pipe to the bottom of the chemical liquid tank without supplying to the spraying device The chemical liquid spraying vehicle according to any one of claims 1 to 3, wherein the stirring pipe cock is provided in the chemical liquid supply operation section.

A transmission case for transmitting engine power is provided below the floor on the front side of the driver's seat, a pump is provided below the driver's seat, an on / off gear for turning the pump on and off, and a main gear shift and a sub gear shift are provided. The on / off gear is configured to be operated by a pump on / off operation lever on one side of the driver's seat, and a main transmission lever for operating the main transmission and an auxiliary transmission lever for operating the auxiliary transmission are provided on the other side of the driver's seat. 5. The chemical solution spraying vehicle according to claim 1, wherein the main gear shift and the sub gear shift are provided adjacent to each other in the front-rear direction.

A steering handle is provided in front of the driver's seat, an operation panel is provided in front of the steering handle, and the spraying device is composed of a boom composed of a left boom, a middle boom, and a right boom. The posture can be changed to the position, the boom can be moved up and down with the lifting link,
The operation panel is equipped with a lift switch that moves the boom up and down,
A left boom operation lever for operating the left boom to the storage position or spraying position on the left and right sides of the steering handle and in front of the chemical supply operation unit, and a right boom operation for operating the right boom to the storage position or spraying position 6. The chemical spray vehicle according to claim 1, wherein the levers are arranged in parallel.