JP4019724B2

JP4019724B2 - Spot spreader

Info

Publication number: JP4019724B2
Application number: JP2002024085A
Authority: JP
Inventors: 一郎渡部; 士郎浅野; 治光十亀
Original assignee: Iseki and Co Ltd
Current assignee: Iseki and Co Ltd
Priority date: 2002-01-31
Filing date: 2002-01-31
Publication date: 2007-12-12
Anticipated expiration: 2022-01-31
Also published as: JP2003219710A

Description

【０００１】
【発明の属する技術分野】
この発明は、点播機に関し、湛水直播機等の点播装置に利用できる。
【０００２】
【従来の技術】
点播形態の播種装置は走行装置の伝動とは独立した電動モータによって駆動する伝動構成としている（特開平１１ー２２５５１４号公報）。
【０００３】
【発明が解決しようとする課題】
点播装置では一般的に播種部を高速回転することによって一定数粒の籾種を高速度に繰出すると共に土壌面に向けて投出するため、前記電動モータを用いた形態では、車体の走行速度に応じてモータの回転数を変更調節しなければならないが、播種速度を一定に保つことは難しく、点播形態でありながら条播形態に近いものとなり易い。この発明はこのような欠陥を解消して、的確な高速点播を行わせようとするものである。
【０００４】
【課題を解決するための手段】
請求項１に記載の発明は、車体（１０）を備える走行装置（１）と、リフトリンク（１１）を介して連結される点播形態の播種装置（２）と、該播種装置（２）へ伝動する播種伝動装置（３）とを設け、前記播種装置（２）には回転しながら種子を繰出す繰出ロール（７）を備え、該繰出ロール（７）には種子を収容する繰出穴（５）と該繰出穴（５）に収容した種子を跳ね出す跳出装置（６）とを設け、該跳出装置（６）は、前記繰出穴（５）の底部に設けた回動自在の跳出アーム（６２）と、該跳出アーム（６２）を弾発するスプリングとを設け、繰出ロール（７）の繰出軸（３７）の下位で跳出アーム（６２）に接当して該跳出アーム（６２）を繰出穴（５）の底部から外周部へ突出作動させるカムローラ（６５）と、跳出装置（６）で跳ね出された種子を案内する繰出筒（８）とを設け、跳出装置（６）の繰出穴（５）から繰出筒（８）へ跳ね出す種子の跳出方向（Ａ）を下向きで且つ繰出筒（８）の案内壁面（９）に対して鋭角（Ｂ）に設定し、カムローラ（６５）を先端に設けて繰出軸（３７）周りに回動するカムアームと、該カムアームを固定するべく繰出ケース（６９）の円弧状長穴（７０）にロックボルト（７１）で締め付けるロックアーム（６８）とを設け、前記ロックボルト（７１）を前記円弧状長穴（７０）に沿って移動することでカムローラ（６５）の位置を調節する構成とした点播機とした。
【０００５】
従って、繰出ロール（７）の回転により、この繰出穴（５）に嵌合される所定粒数の種子が下方の繰出筒（８）側へ繰出される。このとき繰出穴（５）では跳出装置（６）によって種子が繰出筒（８）へ跳ね出される。この跳ね出される種子は下向きで且つ繰出筒（８）の案内壁面（９）に対して鋭角（Ｂ）の方向に跳ね出されて高速で播種案内される。また、ロックボルト（７１）を円弧状長穴（７０）に沿って移動することによってカムローラ（６５）の作動位置を調節し、種子の跳出方向（Ａ）の角度を調節できる。
【０００６】
請求項２に記載の発明は、播種装置（２）には、種子ホッパー（２８）と、繰出筒（８）から繰出される種子を下方へ放出する放出ロータ（２９）及び放出筒（３０）と、土壌面に接地するフロート（３２）とを設け、繰出ロール（７）の繰出穴（５）の後端面（７６）を射方向（Ｃ）に沿う形状とし、車体（１０）の後部上に施肥装置（２６）を搭載し、該施肥装置（２６）から繰出される肥料が施肥パイプ（２７）を介して播種装置（２）の点播部近くの土壌面に施肥される構成とし、前記施肥パイプ（２７）の透明部分に施肥状態を検出するための施肥センサ（７７）を設け、該施肥センサ（７７）に備える発光素子部（７８）と受光素子部（７９）とで構成される投光検出面（８０）を施肥パイプ（２７）の方向に対して垂直方向に沿わせて設けた請求項１に記載の点播機とした。
【０００７】
従って、請求項１に記載の発明の作用に加えて、繰出ロール（７）の繰出穴（５）の後端面（７６）を射方向（Ｃ）に沿う形状としたので、繰出穴（５）に嵌合された種子の持周りを少くして、繰出穴（５）からの跳出を円滑に行わせることができる。また、施肥センサ（７７）に備える発光素子部（７８）と受光素子部（７９）とで構成される投光検出面（８０）を施肥パイプ（２７）の方向に対して垂直方向に沿わせて設けたので、発光素子部（７８）や受光素子部（７９）の検出面に対する肥料や粉塵等の付着を少くできる。
【０００８】
【発明の効果】
請求項１に記載の発明は、跳ね出される種子が下向きで且つ繰出筒（８）の案内壁面（９）に対して鋭角（Ｂ）の方向に跳ね出されて高速で播種案内されるため、種子の跳出速を低下させないで案内壁面（９）に対する衝突力を小さくして速かに種子繰出を行わせることができ、点播状態を維持して的確な高速播種を行わせることができる。又、種子の損傷も少く、特にコーティングされた種子を用いるときは、このコーティング層の崩れや剥離を少くすることができる。また、カムローラ（６５）の作動位置を調節し、種子の跳出方向（Ａ）の角度を調節できる。
【０００９】
請求項２に記載の発明は、請求項１に記載の発明の効果に加えて、繰出穴（５）に嵌合された種子の持周りを少くして、繰出穴（５）からの跳出を円滑に行わせることができ、点播状態を的確に行わせることができる。また、発光素子部（７８）や受光素子部（７９）の検出面に対する肥料や粉塵等の付着を少くでき、施肥センサ（７７）による正確な検出を維持できる。
【００１０】
【発明の実施の形態】
この発明の一実施例を図面に基づいて説明する。先ず図１〜図６において、播種装置２は、乗用４輪駆動走行形態のトラクタ車体１０の後側に、昇降可能の平行リンクからなるリフトリンク１１を介して連結される。車体１０の前後には前車輪１２と後車輪１３が軸装１４，１５されて、運転席１６下部に搭載のエンジン１７によって、ベルト１８伝動機構や、伝動ケース１９内のギヤ伝動機構、及びフロント、リヤアクスルハウジング２０，２１内の伝動機構を経て伝動回転される。２２はステアリングハンドルで、前車輪１２を操向連動する。上下一対のリフトリンク１１は、車体１０の後端部に上下回動自在に連結されて、車体１０に設けられて油圧伸縮されるリフトシリンダ２３によって昇降される。このリフトリンク１１後端のリンクヒッチ２４に播種装置２の中央部がローリング軸２５の周りに回動自在に連結される。２６は施肥装置で、車体１０の後部上に搭載される。この施肥装置２６から繰出される肥料は、施肥パイプ２７を介して播種装置２の点播部近くの土壌面に施肥される。全体として八条点播、及び施肥の形態としている。
【００１１】
前記播種装置２は、上部の種子ホッパー２８、この種子を繰出す繰出ロール７、及び繰出筒８等を有し、更にこの繰出筒８から繰出される種子を下方へ放出する放出ロータ２９、及び放出筒３０等を有し、この播種フレーム３１を土壌面に接地滑走して支持するフロート３２等を配置する。この各フロート３２の左右両側部に播種筒３３が設けられて、上側部に該各放出筒３０及び施肥パイプ２７の下端部をのぞませて、下方へ放出される種子と肥料をフロート３２で均平される土壌面に案内する。３４は播種フレーム３１の前側に設ける補助輪で、路面接地させて操向支持させることができ、播種作業時は非接地状態に上昇させることができる。
【００１２】
前記播種フレーム３１の播種伝動ケース３５には、ベベルギヤ３６伝動機構が設けられて、このベベルギヤ３６の播種軸４７から各繰出ロール７の繰出軸３７と各放出ロータ２９の放出軸３８とにチエン３９，４０を掛け渡して伝動する。このような播種装置２の伝動装置は、車体１０後部のＰＴＯ軸４１に連動する。このＰＴＯ軸４１は、前記車体１０の伝動ケース１９内のギヤ伝動機構から伝動されるＰＴＯ伝動軸４２、４３、及びウォームギヤ４４による減速機構等を経て伝動される構成である。
【００１３】
前記伝動ケース１９内のギヤ伝動機構は、ベルト１８からメインクラッチ４５を有して連動される入力軸４６と、この入力軸４６からギヤ４８を介して常時噛合伝動される変速軸４９と、更にこの変速軸４９上の主変速ギヤ５０から噛合伝動されるカウンタギヤ５１を有するカウンタ軸５２とを配置し、このカウンタギヤ５１からは前車輪１２及び後車輪１３の走行伝動機構５３が伝動される。
【００１４】
前記ＰＴＯ軸４１等のギヤ伝動機構は、播種伝動装置３として前記カウンタ軸５２のカウンタギヤ５１と常時噛合のＰＴＯ入力ギヤ５４を有したＰＴＯ入力軸５５、主変速ギヤ５６と副変速ギヤ６７とを有した変速軸５８、この副変速ギヤ５７と噛合のカウンタギヤ５９及びベベルギヤ６０等を有したカウンタ軸６１等を配置されて、このベベルギヤ６０から前記ＰＴＯ伝動軸４２を連動する播種間隔切替装置４の構成としている。
【００１５】
このような播種装置２の伝動では、主変速ギヤ５０の切替によってカウンタ軸５２が変速されると共に、このカウンタギヤ５１から伝動されるＰＴＯ入力軸５５の伝動も同伝動比のもとに変速される。このため走行速に対する播種装置２の伝動速の比は変わらず、播種間隔は変更されない。播種間隔切替装置４は、前記主変速ギヤ５４の高、低位置の切替と、副変速ギヤ５７の高、低位置の切替とによってＰＴＯ伝動軸４２を四段階に変速できる。これによって車体１０の走行伝動に対して播種装置２の播種伝動速の比が切替られて、点播の各播種間隔を変更することができる。
【００１６】
前記播種装置２の繰出ロール７は、三等分角位置に繰出穴５が形成され、各繰出穴５の底部には跳出装置６として跳出アーム６２がアーム軸６３周りに回動自在に設けられ、スプリング６４によって繰出軸３７側へ弾発される。又、繰出軸３７の周りにはカムアーム６４が嵌合支持されて、このアーム６４の先端のカムローラ６５にこの跳出アーム６２の回転域を接当させて、繰出穴５の底部から外周部へ突出作動させることができる。６６はこの跳出アーム６２の基部ストッパーでロール７の内周面に接当させる。このカムローラ６５の位置は、繰出軸３７の下位にあって、この繰出穴５から跳ね出される種子の跳出方向Ａが、繰出筒８の案内壁面９に対して下向きの鋭角Ｂになるように設定する。このカムアーム６４は、繰出軸３７に嵌合する筒軸６７の一端のロックアーム６８を繰出ケース６９の円弧状長穴７０にロックボルト７１で締め付けて固定できる。このロックボルト７１は長穴７０に沿って移動することによってカムローラ６５の作動位置を調節して、跳出方向Ａの角度Ｂを調節できる。７２は繰出ロール７の回転面を掻き均すスクレパブラシである。
【００１７】
前記放出ロータ２９は、繰出筒８の下部に設けられて、回転周面は鋸歯状の突子７３が形成されて、各突子７３間に数粒の種子を嵌合させて回転により下方の放出筒３０へ放出することができる。この放出ロータ２９は放出軸３８の周りに回転されて突子７３を繰出筒８の下端部を回転圏内にしている。突子７３の回転に対して接線方向の状態に繰出筒８が形成される。７４はこの放出ロータ２９の外周のケースである。前記施肥装置２６はＰＴＯ伝動軸４２の後端部７５から伝動される。
【００１８】
繰出ロール７が回転されるとホッパー２８の種子がスプリング６４で退没する跳出アーム６２位置の繰出穴５に嵌合されて回転され、スクレパブラシ７２で掻き均されて、所定粒数の種子が下側の繰出筒８側へ繰出される。この繰出穴５が下側象限に位置すると、穴底部に位置する跳出アーム６２がカムローラ６５に作用されてスプリング６４に抗して外方へ押されて、この繰出穴５内の種子を下方の案内壁面９へ向けて放出Ａさせる。この種子の放出方向Ａは繰出筒８の案内壁９に沿って鋭角Ｂに向うため、種子の放出力を減速させることが少く、衝撃力を少くして下方の放出ローラ２９側へ繰出すことができ、所定粒数の種子をできるだけ散乱させないようにして、まとめた状態で繰出すことができる。このように繰出された種子は、放出ロータ２９の突子７３間に係合されて、放出筒３０へ変速放出される。このとき間歇的に繰出される種子は散乱することなく少い突子７３間に係合されて放出される。このため播種筒３３を案内されて土壌面に放出される所定粒数の種子は点播状態として播種される。
【００１９】
次に、主として図７において上例とことなる点は、前記繰出ロール７の繰出穴５の後端面７６を、略射方向線Ｃの方向に沿うように形成したものである。これによって繰出穴５に嵌合された所定粒数の種子の持周りを少くして、繰出穴５からの跳出を円滑に行わせて点播状態を的確に行わせるものである。
【００２０】
次に、主として図８、図９に基づいて上例とことなる点は、前記施肥装置２６の施肥パイプ２７部に設ける施肥状態を検出するための詰りセンサや施肥センサ７７において、左右の発光素子部７８と受光素子部７９とによる投光検出面８０を施肥パイプ２７の方向に対して垂直方向に沿わせるようにする。これによって発光素子部７８や受光素子部７９等の検出面に対する肥料や粉塵等の付着を少くして、正確な検出を維持できる。施肥センサ７７の設けられる施肥パイプ２７部分は透明ガラス製としてセンサの透光可能な構成としている。又、これら発光素子部７８や受光素子部７９等は施肥パイプ２７の内周面部に取付ける構成とすることもできる。
【図面の簡単な説明】
【図１】点播機の伝動機構線図。
【図２】その点播機の側面図。
【図３】その平面図。
【図４】その播種装置部の側面図。
【図５】その繰出ロール部の側面図。
【図６】その跳出装置部の断面図と、側面図。
【図７】繰出ロール部の側断面図。
【図８】施肥センサ部の平面図。
【図９】その正断面図。
【符号の説明】
１：走行装置、２：播種装置、３：播種伝動装置、４：播種間隔切替装置、５：繰出穴、６：跳出装置、７：繰出ロール、８：繰出筒、９：案内壁面、１０：車体、１１：リフトリンク、２６：施肥装置、２７：施肥パイプ、２８：種子ホッパー、２９：放出ロータ、３０：放出筒、３２：フロート、３７：繰出軸、６２：跳出アーム、６５：カムローラ、６８：ロックアーム、６９：繰出ケース、７０：円弧状長穴、７１：ロックボルト、７６：繰出穴の後端面、７７：施肥センサ、７８：発光素子部、７９：受光素子部、８０：投光検出面、Ａ：種子の跳出方向、Ｂ：鋭角、Ｃ：射方向 [0001]
BACKGROUND OF THE INVENTION
The present invention relates to a point seeder and can be used for a point seeder such as a flooded direct seeder.
[0002]
[Prior art]
The sowing apparatus of the spot seeding form has a transmission configuration that is driven by an electric motor independent of the transmission of the traveling apparatus (Japanese Patent Laid-Open No. 11-225514).
[0003]
[Problems to be solved by the invention]
In the spot sowing device, a certain number of seeds are generally fed at a high speed by rotating the sowing part at a high speed and thrown toward the soil surface. Therefore, in the form using the electric motor, the traveling speed of the vehicle body However, it is difficult to keep the seeding speed constant, and it is likely to be close to the row seeding form although it is a spot seeding form. The present invention is intended to eliminate such defects and to perform accurate high-speed spot seeding.
[0004]
[Means for Solving the Problems]
The invention according to claim 1 is directed to a traveling device (1) including a vehicle body (10), a seeding device (2) in a point seeding form connected via a lift link (11), and the seeding device (2). A seeding transmission device (3) for transmission, the seeding device (2) is provided with a feeding roll (7) for feeding seeds while rotating, and the feeding roll (7) has a feeding hole for receiving seeds ( 5) and a jumping device (6) for jumping out seeds stored in the feeding hole (5) are provided, and the jumping device (6) is a pivotable jumping arm provided at the bottom of the feeding hole (5). (62) and,該跳 a and vinegar pulling that emits bullet the arm (62) is provided out,該跳out arm and brought into contact with the springing arm (62) at a lower feeding feeding axis of the roll (7) (37) (62) And a popping device (6), and a cam roller (65) for projecting from the bottom of the feeding hole (5) to the outer periphery. A feeding cylinder (8) for guiding the jumped seed, and a seed jumping direction (A) for jumping from the feeding hole (5) of the jumping device (6) to the feeding cylinder (8) is downward and the feeding cylinder A cam arm that is set at an acute angle (B) with respect to the guide wall surface (9) of (8), is provided with a cam roller (65) at the tip, and rotates about the feeding shaft (37), and a feeding case for fixing the cam arm A lock arm (68) tightened with a lock bolt (71) is provided in the arc-shaped elongated hole (70) of (69), and the lock bolt (71) is moved along the arc-shaped elongated hole (70). A spot spreader configured to adjust the position of the cam roller (65) was used .
[0005]
Accordingly, the rotation of the feeding roll (7) feeds a predetermined number of seeds fitted in the feeding hole (5) to the lower feeding cylinder (8) side. At this time, the seed is jumped out to the feeding cylinder (8) by the jumping device (6) in the feeding hole (5) . The splashed seeds are bounced downward and in the direction of an acute angle (B) with respect to the guide wall surface (9) of the feeding cylinder (8) , and are seeded at high speed. Further, the operating position of the cam roller (65) can be adjusted by moving the lock bolt (71) along the arc-shaped elongated hole (70), and the angle of the seed jumping direction (A) can be adjusted.
[0006]
According to the second aspect of the present invention, the seeding device (2) includes a seed hopper (28), a discharge rotor (29) and a discharge cylinder (30) for discharging the seeds fed from the feed cylinder (8) downward. And a float (32) that contacts the soil surface, the rear end surface (76) of the feeding hole (5) of the feeding roll (7) has a shape along the shooting direction (C), and is on the rear part of the vehicle body (10). The fertilizer (26) is mounted on the fertilizer fed from the fertilizer (26) to the soil surface near the spotted portion of the sowing device (2) via the fertilizer pipe (27), A fertilization sensor (77) for detecting a fertilization state is provided in a transparent portion of the fertilization pipe (27), and includes a light emitting element part (78) and a light receiving element part (79) provided in the fertilization sensor (77). The projection detection surface (80) is perpendicular to the direction of the fertilizer pipe (27). It was seeder point according to claim 1 provided Te Align.
[0007]
Therefore, in addition to the action of the invention according to claim 1, since the rear end surface (76) of the feeding hole (5) of the feeding roll (7) has a shape along the shooting direction (C), the feeding hole (5) It is possible to reduce the surroundings of the seeds fitted to, and to smoothly jump out from the feeding hole (5). Moreover, the light projection detection surface (80) comprised by the light emitting element part (78) with which a fertilization sensor (77) is equipped, and a light receiving element part (79) is along a perpendicular direction with respect to the direction of a fertilization pipe (27). Therefore, the adhesion of fertilizer, dust and the like to the detection surface of the light emitting element portion (78) and the light receiving element portion (79) can be reduced.
[0008]
【The invention's effect】
Since a first aspect of the present invention, the seeds Hanedasa are seeded guided at high speed is Hanedasa in the direction of the acute angle (B) against the guide wall (9) of and telescoping barrel downward (8), It is possible to reduce the collision force against the guide wall surface (9) without decreasing the seed jumping speed, and to quickly perform seed feeding, and to maintain a spotted state and to perform accurate high-speed seeding. In addition, there is little damage to the seeds, and particularly when coated seeds are used, the coating layer can be prevented from collapsing and peeling. Moreover, the angle of the seed jumping direction (A) can be adjusted by adjusting the operating position of the cam roller (65).
[0009]
In addition to the effect of the invention described in claim 1, the invention described in claim 2 reduces the surroundings of the seeds fitted in the feeding hole (5), and makes the jump out of the feeding hole (5). It can be performed smoothly, and the sowing state can be performed accurately. Moreover, adhesion of fertilizer, dust, etc. with respect to the detection surface of a light emitting element part (78) or a light receiving element part (79) can be decreased, and the exact detection by a fertilization sensor (77) can be maintained.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. First, in FIG. 1 to FIG. 6, the seeding device 2 is connected to the rear side of a tractor vehicle body 10 in a riding four-wheel drive traveling form via a lift link 11 formed of a parallel link that can be raised and lowered. A front wheel 12 and a rear wheel 13 are mounted on the front and rear of the vehicle body 10, 15, and a belt 18 transmission mechanism, a gear transmission mechanism in a transmission case 19, and a front are mounted by an engine 17 mounted below the driver's seat 16. The transmission is rotated through a transmission mechanism in the rear axle housings 20 and 21. Reference numeral 22 denotes a steering handle that steers the front wheel 12. The pair of upper and lower lift links 11 are connected to the rear end portion of the vehicle body 10 so as to be vertically rotatable, and are lifted and lowered by a lift cylinder 23 provided on the vehicle body 10 and hydraulically expanded and contracted. The center part of the seeding device 2 is connected to the link hitch 24 at the rear end of the lift link 11 so as to be rotatable around the rolling shaft 25. 26 is a fertilizer applied on the rear part of the vehicle body 10. The fertilizer fed from the fertilizer 26 is fertilized on the soil surface near the spot sowing part of the seeding device 2 through the fertilizer pipe 27. As a whole, it is in the form of Hachijo spot sowing and fertilization.
[0011]
The sowing apparatus 2 includes an upper seed hopper 28, a feeding roll 7 for feeding out the seed, a feeding cylinder 8 and the like, and a discharge rotor 29 for discharging the seed fed from the feeding cylinder 8 downward, and A float 32 or the like having a discharge cylinder 30 or the like and supporting the sowing frame 31 by sliding on the soil surface is disposed. Seeding cylinders 33 are provided on both the left and right sides of each float 32, and the lower ends of the respective discharge cylinders 30 and fertilizer pipes 27 are arranged on the upper side so that the seeds and fertilizer released downward are floated on the float 32. Guide to the leveled soil surface. Reference numeral 34 denotes an auxiliary wheel provided on the front side of the sowing frame 31, which can be grounded and supported by steering, and can be raised to a non-grounding state during the sowing operation.
[0012]
The sowing transmission case 35 of the sowing frame 31 is provided with a bevel gear 36 transmission mechanism, and a chain 39 is connected from the sowing shaft 47 of this bevel gear 36 to the feeding shaft 37 of each feeding roll 7 and the discharging shaft 38 of each discharging rotor 29. , 40 is transmitted. Such a transmission device of the seeding device 2 is interlocked with the PTO shaft 41 at the rear of the vehicle body 10. The PTO shaft 41 is configured to be transmitted through a PTO transmission shafts 42 and 43 transmitted from a gear transmission mechanism in the transmission case 19 of the vehicle body 10 and a speed reduction mechanism using a worm gear 44.
[0013]
The gear transmission mechanism in the transmission case 19 includes an input shaft 46 that is interlocked with the main clutch 45 from the belt 18, a transmission shaft 49 that is always meshed and transmitted from the input shaft 46 via the gear 48, and A counter shaft 52 having a counter gear 51 that is meshed and transmitted from the main transmission gear 50 on the transmission shaft 49 is disposed, and the traveling transmission mechanism 53 of the front wheel 12 and the rear wheel 13 is transmitted from the counter gear 51. .
[0014]
The gear transmission mechanism such as the PTO shaft 41 includes a PTO input shaft 55 having a counter gear 51 of the counter shaft 52 and a PTO input gear 54 that is always meshed as the seeding transmission device 3, a main transmission gear 56 and a sub transmission gear 67. And a countershaft 61 having a counter gear 59 meshing with the auxiliary transmission gear 57, a bevel gear 60, and the like, and a seeding interval switching device for interlocking the PTO transmission shaft 42 from the bevel gear 60. 4 configuration.
[0015]
In such transmission of the seeding device 2, the counter shaft 52 is shifted by switching the main transmission gear 50, and the transmission of the PTO input shaft 55 transmitted from the counter gear 51 is also shifted based on the transmission ratio. The For this reason, the ratio of the transmission speed of the sowing apparatus 2 to the traveling speed does not change, and the sowing interval is not changed. The seeding interval switching device 4 can shift the PTO transmission shaft 42 in four stages by switching the high and low positions of the main transmission gear 54 and switching the high and low positions of the auxiliary transmission gear 57. As a result, the ratio of the sowing transmission speed of the sowing device 2 to the traveling transmission of the vehicle body 10 is switched, and each sowing interval of spot sowing can be changed.
[0016]
The feeding roll 7 of the seeding device 2 is formed with a feeding hole 5 at a trisection angle position, and a jumping arm 62 is provided at the bottom of each feeding hole 5 as a jumping device 6 so as to be rotatable around an arm shaft 63. The spring 64 is repelled toward the feeding shaft 37 side. Further, a cam arm 64 is fitted and supported around the feeding shaft 37, and the rotation region of the jumping arm 62 is brought into contact with the cam roller 65 at the tip of the arm 64 so as to protrude from the bottom portion of the feeding hole 5 to the outer peripheral portion. Can be operated. Reference numeral 66 denotes a base stopper of the jumping arm 62 which is brought into contact with the inner peripheral surface of the roll 7. The cam roller 65 is positioned below the feeding shaft 37 so that the seed jumping direction A from the feeding hole 5 is an acute angle B downward with respect to the guide wall surface 9 of the feeding cylinder 8. To do. The cam arm 64 can be fixed by fastening a lock arm 68 at one end of a cylindrical shaft 67 fitted to the feeding shaft 37 to a circular arc-shaped long hole 70 of the feeding case 69 with a lock bolt 71. By moving the lock bolt 71 along the elongated hole 70, the operating position of the cam roller 65 can be adjusted, and the angle B in the jumping direction A can be adjusted. Reference numeral 72 denotes a scraper brush that scrapes and smoothes the rotating surface of the feeding roll 7.
[0017]
The discharge rotor 29 is provided at the lower part of the feeding cylinder 8, and a rotating peripheral surface is formed with sawtooth-shaped protrusions 73. Several seeds are fitted between the protrusions 73, and the lower part is rotated by rotation. The discharge tube 30 can be discharged. The discharge rotor 29 is rotated around the discharge shaft 38 so that the protrusion 73 is placed in the rotational range at the lower end of the delivery cylinder 8. The feeding cylinder 8 is formed in a tangential direction with respect to the rotation of the protrusion 73. Reference numeral 74 denotes a case on the outer periphery of the discharge rotor 29. The fertilizer application 26 is transmitted from the rear end 75 of the PTO transmission shaft 42.
[0018]
When the feeding roll 7 is rotated, the seeds of the hopper 28 are fitted into the feeding hole 5 at the position of the jumping arm 62 that is retracted by the spring 64, rotated, and scraped by the scraper brush 72, so that a predetermined number of seeds are lowered. The feed cylinder 8 is fed to the side. When the feeding hole 5 is located in the lower quadrant, the jumping arm 62 located at the bottom of the hole is acted on the cam roller 65 and pushed outward against the spring 64, so that the seed in the feeding hole 5 is moved downward. Release A toward the guide wall 9. Since the seed discharge direction A is directed to an acute angle B along the guide wall 9 of the feeding cylinder 8, the seed output is rarely decelerated, and the impact is reduced and the seed is discharged toward the lower discharge roller 29. The seeds of a predetermined number of grains can be fed out in a bundled state so as not to be scattered as much as possible. The seeds fed out in this way are engaged between the protrusions 73 of the discharge rotor 29 and are released to the discharge cylinder 30 at a variable speed. At this time, seeds that are intermittently fed are engaged and released between the few protrusions 73 without scattering. For this reason, a predetermined number of seeds that are guided through the sowing cylinder 33 and released to the soil surface are sown in a spotted state.
[0019]
Next, the point different from the upper example mainly in FIG. 7 is that the rear end surface 76 of the feeding hole 5 of the feeding roll 7 is formed so as to be substantially along the direction of the directional line C. As a result, the holding around the predetermined number of seeds fitted in the feeding hole 5 is reduced, and the jumping out from the feeding hole 5 is performed smoothly, so that the spotted state is accurately performed.
[0020]
Next, a point different from the above example mainly based on FIG. 8 and FIG. 9 is that the left and right light emitting elements in the clogging sensor and the fertilization sensor 77 for detecting the fertilization state provided in the fertilization pipe 27 portion of the fertilizer application device 26. The light projection detection surface 80 formed by the portion 78 and the light receiving element portion 79 is set to be perpendicular to the direction of the fertilizer pipe 27. As a result, adhesion of fertilizer, dust and the like to the detection surfaces of the light emitting element portion 78 and the light receiving element portion 79 is reduced, and accurate detection can be maintained. The fertilization pipe 27 portion where the fertilization sensor 77 is provided is made of transparent glass so that the sensor can transmit light. Further, the light emitting element portion 78, the light receiving element portion 79, and the like may be attached to the inner peripheral surface portion of the fertilizer pipe 27.
[Brief description of the drawings]
FIG. 1 is a transmission mechanism diagram of a point seeder.
FIG. 2 is a side view of the point seeder.
FIG. 3 is a plan view thereof.
FIG. 4 is a side view of the seeding device.
FIG. 5 is a side view of the feeding roll portion.
FIG. 6 is a cross-sectional view and a side view of the jumping device portion.
FIG. 7 is a side sectional view of a feeding roll portion .
FIG. 8 is a plan view of a fertilization sensor unit .
FIG. 9 is a front sectional view thereof.
[Explanation of symbols]
1: traveling device, 2: seeding device, 3: seeding transmission, 4: seeding interval switching device, 5: feeding hole 6: springing device, 7: feed roll, 8: feeding tube, 9: guide wall 10: Car body, 11: Lift link, 26: Fertilizer, 27: Fertilizer pipe, 28: Seed hopper, 29: Discharge rotor, 30: Discharge cylinder, 32: Float, 37: Feeding shaft, 62: Jumping arm, 65: Cam roller, 68: Lock arm, 69: Feeding case, 70: Arc-shaped long hole, 71: Lock bolt, 76: Rear end surface of feed hole, 77: Fertilization sensor, 78: Light emitting element part, 79: Light receiving element part, 80: Throw Light detection surface, A: seed jumping direction, B: acute angle, C: shooting direction

Claims

A traveling device (1) having a vehicle body (10), a seeding device (2) in a spot seeding form connected via a lift link (11), and a seeding transmission device (3) that transmits to the seeding device (2) The seeding device (2) is provided with a feeding roll (7) for feeding seeds while rotating, and the feeding roll (7) has a feeding hole (5) for accommodating seeds and the feeding hole (5). A jumping device (6) for jumping out the seeds contained in the swinging hole, and the jumping device (6) includes a pivotable jumping arm (62) provided at the bottom of the feeding hole (5), and the jumping arm ( 62) and a spring that repels the projecting arm (62) at the lower part of the feeding shaft (37) of the feeding roll (7), so that the jumping arm (62) is outer peripheral from the bottom of the feeding hole (5). The cam roller (65) that projects and projects the seed and the seed that has been ejected by the ejector (6) And a guide wall surface of the feeding cylinder (8) with the direction of jumping (A) of the seeds jumping from the feeding hole (5) of the jumping device (6) to the feeding cylinder (8) downward. 9) An acute angle (B) with respect to 9), a cam arm provided with a cam roller (65) at the tip and rotating around the feeding shaft (37), and an arcuate length of the feeding case (69) for fixing the cam arm A lock arm (68) to be tightened with a lock bolt (71) is provided in the hole (70), and the position of the cam roller (65) is moved by moving the lock bolt (71) along the arc-shaped elongated hole (70). Spot spreader with a configuration to adjust.

The seeding device (2) includes a seed hopper (28), a discharge rotor (29) and a discharge cylinder (30) for discharging seeds fed from the feed cylinder (8) downward, and a float ( 32), the rear end surface (76) of the feeding hole (5) of the feeding roll (7) is shaped along the shooting direction (C), and the fertilizer (26) is mounted on the rear part of the vehicle body (10). The fertilizer fed from the fertilizer (26) is fertilized on the soil surface near the spot sowing part of the seeding device (2) through the fertilizer pipe (27), and the fertilizer pipe (27) has a transparent portion. A fertilization sensor (77) for detecting a fertilization state is provided, and a light projecting detection surface (80) composed of a light emitting element part (78) and a light receiving element part (79) provided in the fertilization sensor (77) is fertilized. 2. The pipe (27) according to claim 1 provided along a direction perpendicular to the direction of the pipe (27). Seeder point of the mounting.