JP2014147306A

JP2014147306A - Fertilization machine

Info

Publication number: JP2014147306A
Application number: JP2013016794A
Authority: JP
Inventors: Manabu Takahashi; 学高橋
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: 2013-01-31
Filing date: 2013-01-31
Publication date: 2014-08-21

Abstract

PROBLEM TO BE SOLVED: To provide a seedling transplanter, which includes a fertilization device capable of effectively using a blow from a blower for a fertilizer tank and transporting a fertilizer, and has a seedling planting device connected to the rear of a tractor.SOLUTION: A seedling transplanter includes: a fertilization device which transports a fertilizer to a field by supplying transport air from a blower 69 to a blowing passage 33. A fertilizer inflow duct 45 for feeding the transport air from the blower 69 directly into a fertilizer tank 67 is provided, and the fertilizer inflow duct 45 is provided with an opening and closing valve 47 for intermittently feeding the transport air into the fertilizer tank 67, so that a fertilizer in the fertilizer tank 67 can be stirred by the flow of the air and dried. Therefore, the fertilizer can be prevented from being massive and jammed due to its dead weight and humidity in the fertilizer tank 67, the supply and discharge of the fertilizer can be smoothed, the occurrence of a fertilizer shortage can be prevented, and also the discharge work time for the fertilizer is not increased.

Description

この発明は、苗移植を行う際に圃場に肥料を施す施肥装置を備えた苗移植機に関する。 The present invention relates to a seedling transplanter provided with a fertilizer application device that applies fertilizer to a field when seedling transplantation is performed.

この種の従来技術としては、施肥装置を備え、さらに苗植付装置をトラクタの後方に連結した苗移植機が知られている。 As this type of conventional technology, there is known a seedling transplanting machine that includes a fertilizer application device and further connects a seedling planting device to the rear of the tractor.

特開２００６−１６６８２０号公報JP 2006-166820 A

前記特許文献１記載の苗移植機は、走行車体の後部に設ける施肥装置から肥料を所定量ずつ放出し、圃場に植え付けた苗に肥料を供給する構成が開示されている。前記施肥装置は、肥料を所定量ずつ放出し、圃場に植え付けた苗に肥料を供給すると共に、余った肥料をホッパの下部で且つ機体後側から排出できるものである。また、圃場への肥料の搬送、及び排出された肥料の機外への搬送は、ブロアを作動させて発生させた搬送風によって行っている。 The seedling transplanter described in Patent Document 1 discloses a configuration in which a predetermined amount of fertilizer is discharged from a fertilizer provided at the rear of a traveling vehicle body, and the fertilizer is supplied to seedlings planted in a farm field. The fertilizer can release a predetermined amount of fertilizer, supply the fertilizer to seedlings planted in the field, and discharge the surplus fertilizer from the lower part of the hopper and from the rear side of the machine body. Further, the transport of the fertilizer to the field and the transport of the discharged fertilizer to the outside of the machine are performed by a transport wind generated by operating a blower.

しかしながら、肥料の供給、及び排出作業中は、ホッパの蓋を閉めたまま作業をする必要があり、ホッパ内の湿度が高くなり、肥料が湿気によって塊となり、排出されにくくなるという問題がある。 However, during the supply and discharge work of fertilizer, it is necessary to work with the lid of the hopper closed, and there is a problem that the humidity in the hopper becomes high and the fertilizer becomes a lump due to the humidity and is difficult to be discharged.

また、これによって圃場に肥料が供給されなくなり、肥料不足で苗が生育不良を起こし、作物の品質が低下するという問題がある。
さらに、詰まった肥料は取り除く必要があるので、この作業中施肥作業は中断されるため、作業能率が低下すると共に、作業者に余分な労力を費やさせるという問題がある。 In addition, the fertilizer is not supplied to the field, and there is a problem that the seedlings grow poorly due to a shortage of fertilizer and the quality of the crop is lowered.
Further, since it is necessary to remove the clogged fertilizer, the fertilization work is interrupted during this work, and there is a problem that the work efficiency is lowered and the worker is required to spend extra labor.

上記の問題を解消するためにエンジン排熱をブロアに送り、熱風で肥料の搬送を行える構成にしているが、搬送中に乾燥させることのできる肥料の量は限られており、ホッパ内で塊となった肥料は乾燥不足になるという問題がある。 In order to solve the above problem, the engine exhaust heat is sent to the blower and the fertilizer can be transported with hot air. However, the amount of fertilizer that can be dried during transport is limited, and the amount of fertilizer that can be dried during transport is limited. There is a problem that the fertilizer that has become deficient in drying.

そこで、本発明の課題は、ブロアからの送風を効果的に肥料タンクと施肥搬送に用いることができる施肥装置を備え、さらに苗植付装置をトラクタの後方に連結した苗移植機を提供することである。 Then, the subject of this invention is provided with the fertilizer which can use the ventilation from a blower for a fertilizer tank and fertilizer conveyance effectively, and also provides the seedling transplanter which connected the seedling planting apparatus to the back of a tractor. It is.

上記課題は、次の解決手段により解決できる。
請求項１記載の発明は、肥料を貯留する肥料タンク（６７）と、肥料タンク（６７）の下部に落下する肥料を定量ずつ送り出す繰出部（６８）と、肥料タンク（６７）の下方に肥料の搬送風が移動する送風流路（搬送風ダクト）（３３）と、送風流路（３３）に搬送風を供給するブロア（６９）とを備える施肥装置において、肥料タンク（６７）内に残った肥料を排出する肥料排出流路（肥料排出ダクト）（３４）と、肥料タンク（６７）の後部に前記送風流路（搬送風ダクト）（３３）又は肥料排出流路（肥料排出ダクト）（３４）へ接続する肥料タンク（６７）の排出口（６７ｂ）と、肥料タンク（６７）内にブロア（６９）からの搬送風を送り込む肥料流入流路（肥料流入ダクト）（４５）を設け、該肥料流入流路（４５）には、肥料タンク（６７）内に搬送風を間欠的に送り込む開閉弁（バルブ）（４７）を設けたことを特徴とする施肥装置を備えた苗移植機である。 The above problem can be solved by the following solution means.
The invention described in claim 1 includes a fertilizer tank (67) for storing fertilizer, a feeding section (68) for feeding the fertilizer falling to the lower portion of the fertilizer tank (67), and a fertilizer below the fertilizer tank (67). In a fertilizer applying device provided with a ventilation channel (conveyance air duct) (33) through which the conveyance air moves, and a blower (69) for supplying conveyance air to the ventilation channel (33), the fertilizer tank (67) remains. The fertilizer discharge flow path (fertilizer discharge duct) (34) for discharging the fertilizer and the rear flow path (conveyance wind duct) (33) or the fertilizer discharge flow path (fertilizer discharge duct) ( 34) An outlet (67b) of the fertilizer tank (67) connected to the fertilizer tank (67), and a fertilizer inflow channel (fertilizer inflow duct) (45) for feeding the conveying air from the blower (69) into the fertilizer tank (67), The fertilizer inflow channel (45) has a fertilizer Link (67) is a seedling transplantation machine having a fertilizer apparatus characterized by comprising intermittently feeding off valve (valve) (47) the carrier air in.

請求項２記載の発明は、肥料流入流路（流入ダクト）（４５）は、送風流路（搬送風ダクト）（３３）又は肥料排出流路（肥料排出ダクト）（３４）を分岐させて設け、送風流路（搬送風ダクト）（３３）又は肥料排出流路（肥料排出ダクト）（３４）における肥料流入流路（流入ダクト）（４５）への分岐部に開閉弁（４７）を設けたことを特徴とする請求項１に記載の施肥装置を備えた苗移植機である。 According to the second aspect of the present invention, the fertilizer inflow passage (inflow duct) (45) is provided by branching the air flow passage (conveying air duct) (33) or the fertilizer discharge passage (fertilizer discharge duct) (34). An opening / closing valve (47) is provided at a branching point to the fertilizer inflow passage (inflow duct) (45) in the air flow passage (conveying air duct) (33) or the fertilizer discharge passage (fertilizer discharge duct) (34). A seedling transplanter equipped with the fertilizer application device according to claim 1.

請求項３記載の発明は、肥料タンク（６７）内に、内部の湿度を検出する第１湿度検知部材（湿度センサ）（４８ａ）を設け、該第１湿度検知部材（４８ａ）が所定値以上の湿度を検知すると開閉弁（４７）を開き、前記第１湿度検知部材（４８ａ）が前記所定値未満の湿度を検知すると開閉弁（４７）を第１電動モータ（４９）を用いて閉じる制御を行う制御装置（１００）を設けたことを特徴とする請求項１または２に記載の施肥装置を備えた苗移植機である。 According to the third aspect of the present invention, in the fertilizer tank (67), a first humidity detection member (humidity sensor) (48a) for detecting internal humidity is provided, and the first humidity detection member (48a) is not less than a predetermined value. When the humidity is detected, the on-off valve (47) is opened, and when the first humidity detecting member (48a) detects the humidity below the predetermined value, the on-off valve (47) is closed using the first electric motor (49). It is a seedling transplanter provided with the fertilizer application device according to claim 1 or 2 provided with a control device (100) which performs.

請求項４記載の発明は、前記開閉弁（４７）が、第１湿度検知部材（４８ａ）が所定値以上の湿度を検知すると、間欠的に開閉し、湿度が前記所定値未満になると開閉を停止し、閉まる制御を行う制御装置（１００）を設けたことを特徴とする請求項３に記載の施肥装置を備えた苗移植機である。 According to a fourth aspect of the present invention, the on-off valve (47) opens and closes intermittently when the first humidity detecting member (48a) detects humidity equal to or higher than a predetermined value, and opens and closes when the humidity falls below the predetermined value. The seedling transplanting machine provided with a fertilizer application device according to claim 3, wherein a control device (100) for controlling to stop and close is provided.

請求項５記載の発明は、肥料タンク（６７）の外側に、外気の湿度を検知する第２湿度検知部材（４８ｂ）を設け、前記第１湿度検知部材（４８ａ）と第２湿度検知部材（４８ｂ）の湿度を比較し、湿度の差が設定値よりも大きくなると、開閉弁（４７）を作動（例えば間欠的に開閉）させる制御構成を制御装置（１００）に設けたことを特徴とする請求項３または４に記載の施肥装置を備えた苗移植機である。 The invention according to claim 5 is provided with a second humidity detecting member (48b) for detecting the humidity of the outside air outside the fertilizer tank (67), and the first humidity detecting member (48a) and the second humidity detecting member ( 48b), the control device (100) is provided with a control configuration for operating the on-off valve (47) (for example, intermittently opening and closing) when the humidity difference becomes larger than a set value. It is a seedling transplanter provided with the fertilizer application apparatus of Claim 3 or 4.

請求項６記載の発明は、施肥装置（４）の作動部を動かすために設けた駆動体（走行車体のエンジン）（１２）と、該駆動体（１２）の駆動で生じる熱風を移動させる送熱部材（ラジエータファン）（５０ａ）と、該送熱部材（５０ａ）と肥料タンク（６７）の左右一側端部を連結する送熱流路（送熱ダクト）（５５）と、肥料タンク（６７）の左右他側端部とブロア（６９）を連結する第１連結流路（連結ダクト）（５２）を設けたことを特徴とする請求項１に記載の施肥装置を備えた苗移植機である。 The invention according to claim 6 is a driving body (engine of a traveling vehicle body) (12) provided for moving the operating portion of the fertilizer application device (4), and a hot air generated by driving the driving body (12). A heat member (radiator fan) (50a), a heat feed channel (heat feed duct) (55) connecting the heat feed member (50a) and the left and right ends of the fertilizer tank (67), and a fertilizer tank (67 A seedling transplanting machine equipped with a fertilizer application device according to claim 1, characterized in that a first connection channel (connection duct) (52) for connecting the left and right other side ends of) and the blower (69) is provided. is there.

請求項７記載の発明は、ブロア（６９）と搬送風流路（３３）の間に、湿気を除去する除湿フィルタ（５３）を設け、該除湿フィルタ（５３）よりも下手側の搬送風流路（３３）を、マフラ（５６）の上方に位置させたことを特徴とする請求項６に記載の施肥装置を備えた苗移植機である。 According to the seventh aspect of the present invention, a dehumidifying filter (53) for removing moisture is provided between the blower (69) and the conveying air flow path (33), and the conveying air flow path (lower side of the dehumidifying filter (53)) ( 33) A seedling transplanter equipped with a fertilizer application device according to claim 6, wherein 33) is positioned above the muffler (56).

請求項８記載の発明は、前記肥料タンク（６７）に肥料の比重を検知する比重検知部材（５８）を設け、該比重検知部材（５８）の検知した比重が所定値（ｇ／ｍ^３当たり、投入時から３〜５％増）以上になると（肥料が吸湿したと判断し）、第２電動モータ（６０）の回転数を上げて熱風の量を増やす構成としたことを特徴とする請求項６または７に記載の施肥装置を備えた苗移植機である。 The invention according to claim 8 is provided with a specific gravity detection member (58) for detecting the specific gravity of the fertilizer in the fertilizer tank (67), and the specific gravity detected by the specific gravity detection member (58) is a predetermined value (per g / m ³⁾ . When it becomes more than 3-5% from the time of input) (determined that the fertilizer has absorbed moisture), the number of hot air is increased by increasing the number of rotations of the second electric motor (60). A seedling transplanter provided with the fertilizer application according to Item 6 or 7.

請求項１記載の発明によれば、肥料タンク６７内に肥料流入ダクト４５を経由してブロア６９からの搬送風が送り込まれることにより、肥料タンク６７内の肥料を空気の流れで撹拌すると共に、乾燥させることができる。そのため、肥料が自重や肥料タンク６７内の湿気によって塊になり、詰まることが防止されるため、肥料の供給や排出が滞ることが防止され、肥料不足の発生が防止されると共に、肥料の排出作業時間が長くなることが防止される。 According to the invention of claim 1, while the conveying wind from the blower 69 is fed into the fertilizer tank 67 via the fertilizer inflow duct 45, the fertilizer in the fertilizer tank 67 is stirred by the flow of air, Can be dried. For this reason, the fertilizer is prevented from clogging due to its own weight or the humidity in the fertilizer tank 67, preventing the supply and discharge of the fertilizer from being delayed, preventing the occurrence of fertilizer shortage, and discharging the fertilizer. Long working hours are prevented.

また肥料タンク６７に接続した肥料流入ダクト４５の先端部に設けた開閉弁４７によって肥料流入ダクト４５を開閉させ、肥料タンク６７内に搬送風が入らないタイミングを生じさせることにより肥料が浮き上がり、繰出部６８や排出口（開口部）６７ｂに移動しなくなることを防止することができるので、肥料の供給や排出が滞ることが防止され、肥料不足の発生が防止されると共に、肥料の排出作業時間が長くなることが防止される。 Further, the fertilizer is lifted by feeding the fertilizer inflow duct 45 by opening and closing the fertilizer inflow duct 45 by an on-off valve 47 provided at the tip of the fertilizer inflow duct 45 connected to the fertilizer tank 67, and generating a timing at which the conveying air does not enter the fertilizer tank 67. Since it can prevent that it stops moving to the part 68 and the discharge port (opening part) 67b, it is prevented that supply and discharge | emission of fertilizer is overdue, generation | occurrence | production of a fertilizer shortage is prevented, and the discharge work time of a fertilizer Is prevented from becoming longer.

請求項２記載の発明によれば、請求項１記載の発明の効果に加えて、肥料流入ダクト４５を搬送風流路３３から分岐させて構成したことにより、肥料流入ダクト４５の配置構成が複雑化することを防止できるので、施肥装置４（肥料タンク６７、繰出部６８、ブロア６９、肥料流入ダクト４５、搬送風流路３３などから構成される）の構成が簡潔になる。 According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the arrangement of the fertilizer inflow duct 45 is complicated by the fact that the fertilizer inflow duct 45 is branched from the conveying air flow path 33. Therefore, the configuration of the fertilizer application device 4 (comprising the fertilizer tank 67, the feeding portion 68, the blower 69, the fertilizer inflow duct 45, the conveying wind passage 33, etc.) is simplified.

肥料流入ダクト４５と搬送風流路３３の分岐部に開閉弁４７を設けたことにより、肥料の供給作業、または肥料の排出作業をしながら肥料タンク６７内に搬送風を送り込むことができるので、肥料の撹拌や乾燥を別工程として行う必要が無く、作業能率が従来技術より向上する。 Since the opening / closing valve 47 is provided at the branch portion of the fertilizer inflow duct 45 and the transport wind passage 33, the transport wind can be sent into the fertilizer tank 67 while performing the fertilizer supply work or the fertilizer discharge work. There is no need to perform stirring and drying as separate processes, and the work efficiency is improved as compared with the prior art.

請求項３記載の発明によれば、請求項１または２記載の発明の効果に加えて、肥料タンク６７内の湿度に合わせて開閉弁４７が開閉する構成としたことにより、湿度が高いときにだけ肥料タンク６７内に搬送風が入り込んで内部の湿気を追い出し、肥料の乾燥を行うことができるので、肥料の詰まりが防止され、作業能率が従来以上に向上すると共に、いろいろな流路に詰まった肥料の除去作業が不要となる。 According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, when the on-off valve 47 opens and closes according to the humidity in the fertilizer tank 67, the humidity is high. Only the transport air enters the fertilizer tank 67, expels the moisture inside, and the fertilizer can be dried, so that the clogging of the fertilizer is prevented, the work efficiency is improved more than before, and the various flow paths are clogged. No need to remove the fertilizer.

また、湿度が下がると肥料流入ダクト４５が閉じられて搬送風が移動しなくなることにより、肥料を肥料タンク６７の排出口（開口部）６７ｂへの搬送に十分な風量を供給することができるので、肥料不足が防止されて作物の生育が良好になると共に、肥料の排出作業に要する時間が軽減される。 Further, when the humidity is lowered, the fertilizer inflow duct 45 is closed and the conveying wind does not move, so that a sufficient amount of air can be supplied for conveying the fertilizer to the discharge port (opening) 67b of the fertilizer tank 67. In addition, the shortage of fertilizer is prevented and the growth of the crop is improved, and the time required for discharging the fertilizer is reduced.

請求項４記載の発明によれば、請求項３記載の発明の効果に加えて、肥料タンク６７内部の湿度が所定値以上であるとき、開閉弁４７を間欠的に開くことにより、肥料タンク６７内に過度の搬送風が入り込むことを防止できるので、肥料が舞い上がって繰出部６８や排出口６７ｂから離れることが防止され、肥料の供給や排出が確実且つ能率的に行われる。 According to the invention described in claim 4, in addition to the effect of the invention described in claim 3, when the humidity inside the fertilizer tank 67 is equal to or higher than a predetermined value, the on-off valve 47 is intermittently opened. Since it is possible to prevent excessive conveying air from entering the fertilizer, it is possible to prevent the fertilizer from flying up and away from the feeding portion 68 and the discharge port 67b, so that the supply and discharge of the fertilizer is performed reliably and efficiently.

また、搬送風が間欠的に肥料流入ダクト４５に移動することにより、湿度が前記所定値よりも高い間中、肥料を圃場に搬送する送風流路（搬送風ダクト）３３と余った肥料を圃場に捨てる肥料排出流路（肥料排出ダクト）３４への送風を確実に行うことで、肥料搬送力が弱くなって、肥料の搬送能率が低下することが防止される。 Further, by intermittently moving the transport wind to the fertilizer inflow duct 45, the air flow path (transport wind duct) 33 for transporting the fertilizer to the field while the humidity is higher than the predetermined value and the surplus fertilizer are removed from the field. By reliably blowing air to the fertilizer discharge flow path (fertilizer discharge duct) 34, the fertilizer transport force is weakened, and the fertilizer transport efficiency is prevented from being lowered.

請求項５記載の発明によれば、請求項３または４記載の発明の効果に加えて、肥料タンク６７の内外の湿度を検知し、その差が大きいときに開閉弁４７を作動させて肥料流入ダクト４５から搬送風が肥料タンク６７内に入り込む構成としたことにより、肥料を圃場に供給する送風流路（搬送風ダクト）３３と余った肥料を捨てるための肥料排出流路（肥料排出ダクト）３４への搬送風の供給量が低下することを一層防止できるので、搬送風が弱くなって肥料の搬送能率が低下することが防止される。 According to the invention described in claim 5, in addition to the effect of the invention described in claim 3 or 4, the humidity inside and outside the fertilizer tank 67 is detected, and when the difference is large, the on-off valve 47 is operated to input the fertilizer. By adopting a configuration in which the conveyance air enters the fertilizer tank 67 from the duct 45, the air flow passage (conveyance air duct) 33 for supplying the fertilizer to the field and the fertilizer discharge flow path (fertilizer discharge duct) for discarding surplus fertilizer Since it can prevent further that the supply amount of the conveyance wind to 34 falls, it is prevented that a conveyance wind becomes weak and the conveyance efficiency of a fertilizer falls.

請求項６記載の発明によれば、請求項１記載の発明の効果に加えて、駆動体１２の発する熱風を送熱ダクト５５を経由して肥料タンク６７内に送り込むことにより、高温で肥料の水分を除去することができるので、肥料同士が水分で固まり合うことが防止され、肥料が詰まって供給されなくなることが防止される。 According to the invention described in claim 6, in addition to the effect of the invention described in claim 1, the hot air generated by the driving body 12 is fed into the fertilizer tank 67 via the heat feeding duct 55, so that the fertilizer can be produced at a high temperature. Since moisture can be removed, the fertilizers are prevented from solidifying with each other, and the fertilizer is prevented from becoming clogged and not being supplied.

また肥料タンク６７から排出される熱風をブロア６９に第１連結ダクト５２を経由して送り込むことにより、搬送風流路３３に熱風を供給することができるので、肥料繰出部６８から繰り出される肥料や、排出口６７ｂから排出される肥料が塊になって詰まることが防止され、作業能率が向上すると共に、詰まった肥料を除去する作業が不要となり、作業者の労力が軽減される。 Further, by sending the hot air discharged from the fertilizer tank 67 to the blower 69 via the first connection duct 52, hot air can be supplied to the conveying air flow path 33, so that the fertilizer fed from the fertilizer feeding unit 68, It is prevented that the fertilizer discharged from the discharge port 67b becomes a lump and is clogged, the work efficiency is improved, and the work of removing the clogged fertilizer becomes unnecessary, and the labor of the operator is reduced.

請求項７記載の発明によれば、請求項６記載の発明の効果に加えて、除湿フィルタ５３をブロア６９と搬送風流路３３の間に設けたことにより、熱風内に混入した肥料タンク６７内の湿気を取り除いてから搬送風流路３３に移動させることができるので、供給または排出される肥料が湿気で塊になることが防止され、作業能率が従来より向上すると共に、詰まった肥料を除去する作業が不要となり、作業者の労力が軽減される。 According to the seventh aspect of the invention, in addition to the effect of the sixth aspect of the invention, the dehumidification filter 53 is provided between the blower 69 and the conveying air flow path 33, so that the inside of the fertilizer tank 67 mixed in the hot air. Since the moisture can be moved to the conveying air flow path 33, the supplied or discharged fertilizer is prevented from becoming a mass due to the moisture, and the work efficiency is improved as compared with the conventional method, and the clogged fertilizer is removed. Work becomes unnecessary, and labor of an operator is reduced.

除湿フィルタ５３よりも搬送風の移動経路の下手側の搬送風流路３３にマフラ５６の上方に位置させたことにより、ブロア６９により生じる搬送風を再加熱することができるので、供給または排出される肥料が乾燥しやすくなる。 Since the conveyance air flow generated by the blower 69 can be reheated by being positioned above the muffler 56 in the conveyance air flow path 33 on the lower side of the conveyance path of the conveyance air than the dehumidifying filter 53, it is supplied or discharged. Fertilizer becomes easy to dry.

請求項８記載の発明によれば、請求項６又は７記載の発明の効果に加えて、肥料の比重が増加すると、肥料が吸湿するほどの湿度であると判断し、第２電動モータ６０の回転数を上げて熱風の量を増やす構成としたことにより、湿度の変化が生じても肥料が湿気で塊になることを防止できるので、肥料タンク６７の排出口６７ｂから排出される肥料が塊になって詰まることが防止され、作業能率が向上すると共に、詰まった肥料を除去する作業が不要となり、作業者の労力が軽減される。 According to the invention described in claim 8, in addition to the effect of the invention described in claim 6 or 7, when the specific gravity of the fertilizer increases, it is determined that the humidity is such that the fertilizer absorbs moisture. By adopting a configuration that increases the amount of hot air by increasing the number of rotations, it is possible to prevent the fertilizer from clumping with moisture even if the humidity changes, so that the fertilizer discharged from the discharge port 67b of the fertilizer tank 67 is lump Thus, clogging is prevented, work efficiency is improved, work for removing the clogged fertilizer becomes unnecessary, and labor of the worker is reduced.

本発明の実施例の施肥装置付き乗用型田植機の側面図である。It is a side view of the riding type rice transplanter with a fertilizer application of the example of the present invention. 図１の施肥装置付き乗用型田植機の平面図である。It is a top view of the riding type rice transplanter with a fertilizer application of FIG. 図１の乗用型田植機の肥料タンクとその周辺の肥料搬送用ダクト類の背面図である。It is a rear view of the fertilizer tank of the riding type rice transplanter of FIG. 1, and the surrounding fertilizer conveyance ducts. 図１の乗用型田植機の肥料タンクとその周辺の肥料搬送用ダクト類の平面図（図４（ａ）はダクトを開閉弁で閉じた状態、図４（ｂ）ダクトを開閉弁で開いた状態をそれぞれ示す）である。FIG. 4A is a plan view of the fertilizer tank of the riding type rice transplanter and the surrounding fertilizer transport ducts in FIG. 1 (FIG. 4A is a state in which the duct is closed by an on-off valve, FIG. 4B is a view in which the duct is opened by an on-off valve. Each indicates a state). 図１の乗用型田植機の制御ブロック図である。It is a control block diagram of the riding type rice transplanter of FIG. 図１の乗用型田植機の肥料タンクとその周辺の肥料搬送用ダクト類の構成図である。It is a block diagram of the fertilizer tank of the riding type rice transplanter of FIG. 1 and the surrounding fertilizer conveyance ducts. 図１の乗用型田植機のブロア出口に接続するダクトの一部の斜視図（図７（ａ））とダクト開口部を見た図（図７（ｂ））である。It is the perspective view (FIG.7 (a)) of a part of duct connected to the blower exit of the riding type rice transplanter of FIG. 1, and the figure (FIG.7 (b)) which looked at the duct opening part. 図１の乗用型田植機の側面図（図８（ａ））、図８（ａ）の背面図（図８（ｂ））と従来技術の乗用型田植機の側面図（図８（ｃ））と図８（ｃ）の背面図（図８（ｄ））である。1 is a side view (FIG. 8 (a)) of the riding type rice transplanter of FIG. 1, a rear view (FIG. 8 (b)) of FIG. 8 (a), and a side view of the conventional riding type rice transplanter (FIG. 8 (c)). ) And a rear view of FIG. 8C (FIG. 8D). 図１の乗用型田植機の昇降リンク取付フレームと後輪伝動ケース取り付けフレームを兼用するフレーム構造を示す斜視図（図９（ａ）は本発明の実施例、図９（ｂ）は従来技術）である。The perspective view which shows the frame structure which uses the raising / lowering link attachment frame and rear-wheel transmission case attachment frame of the riding type rice transplanter of FIG. 1 (FIG. 9 (a) is an Example of this invention, FIG.9 (b) is a prior art). It is. 図１の乗用型田植機の昇降リンク取付フレームと後輪伝動ケース取り付けフレームを兼用するフレーム構造を示す側面図（図１０（ａ）は本発明の実施例、図１０（ｂ）は従来技術）である。The side view which shows the frame structure which combines the raising / lowering link attachment frame and rear-wheel transmission case attachment frame of the riding type rice transplanter of FIG. 1 (FIG. 10 (a) is an Example of this invention, FIG.10 (b) is a prior art). It is.

この発明の作業機の一実施例である６条植え乗用型田植機について図面に基づき詳細に説明する。
図１の側面図と図２の平面図に示すように、乗用型田植機（施肥機）は走行車両１に昇降用リンク装置２で作業装置の一種である苗植付装置３を装着すると共に施肥装置４を設け、全体で乗用型施肥田植機として機能するように構成されている。走行車両１は、駆動輪である左右各一対の前輪６、６および後輪７、７を有する四輪駆動車両である。 A six-row planting type rice transplanter as an embodiment of the working machine of the present invention will be described in detail with reference to the drawings.
As shown in the side view of FIG. 1 and the plan view of FIG. The fertilizer application device 4 is provided, and is configured to function as a riding type fertilizer field transplanter as a whole. The traveling vehicle 1 is a four-wheel drive vehicle having a pair of left and right front wheels 6 and 6 and rear wheels 7 and 7 as drive wheels.

なお、本明細書では田植機の前進方向に向かって左右をそれぞれ左側と右側といい、前進方向を前側、後進方向を後側という。
図１に示すように、メインフレーム１０ａ、１０ｂにミッションケース１１とエンジン１２が配設されており、該ミッションケース１１の後部側面に油圧ポンプ１３がケース１１と一体に組み付けられ、ミッションケース１１の前部上方にステアリングポスト１４が突設されている。 In this specification, the left and right sides in the forward direction of the rice transplanter are referred to as the left side and the right side, respectively, the forward direction is referred to as the front side, and the reverse direction is referred to as the rear side.
As shown in FIG. 1, a mission case 11 and an engine 12 are disposed on main frames 10 a and 10 b, and a hydraulic pump 13 is assembled integrally with the case 11 on the rear side surface of the mission case 11. A steering post 14 projects from the front part.

そして、ステアリングポスト１４の上端部にステアリングハンドル１６が設けられている。機体の上部には操縦用のフロアとなるステップフロア１９が取り付けられ、エンジン１２の上方部に操縦席２０が設置されている。ステアリングハンドル１６の右側には変速レバー１７が設けられ、操縦席２０の右側には畦クラッチレバー１８が設けられている。 A steering handle 16 is provided at the upper end of the steering post 14. A step floor 19 serving as a control floor is attached to the upper part of the airframe, and a cockpit seat 20 is installed above the engine 12. A shift lever 17 is provided on the right side of the steering handle 16, and a saddle clutch lever 18 is provided on the right side of the cockpit 20.

前輪６、６はミッションケース１１の側方に向きを変更可能に設けた前輪支持ケース２２、２２に軸支されている。また、後輪７、７は、左右フレーム３７の左右両端部に取り付けた後輪伝動ケース２４、２４に後輪支持体３０を介して軸支されている。左右フレーム３７はメインフレーム１０ａ、１０ｂの後端部に支持されている。 The front wheels 6, 6 are pivotally supported by front wheel support cases 22, 22 provided on the side of the mission case 11 so that the direction can be changed. The rear wheels 7 and 7 are pivotally supported via rear wheel support bodies 30 on rear wheel transmission cases 24 and 24 attached to both left and right ends of the left and right frame 37. The left and right frames 37 are supported at the rear ends of the main frames 10a and 10b.

図１と図２に後輪７への動力伝動機構の一部を示すように、エンジン１２の回転動力は、プーリ２７、ベルト２８及びプーリ２９を順次経由して油圧式無段変速装置（ＨＳＴ）３１の入力軸３２ａに伝えられ、ＨＳＴの出力軸３２ｂからミッションケース１１内に伝えられる。 As shown in FIG. 1 and FIG. 2, a part of the power transmission mechanism to the rear wheel 7, the rotational power of the engine 12 passes through a pulley 27, a belt 28, and a pulley 29 in order, and is a hydraulic continuously variable transmission (HST). ) Is transmitted to the input shaft 32 a of 31, and is transmitted to the mission case 11 from the output shaft 32 b of the HST.

リヤ出力軸１１ａ、１１ｂの後端部はミッションケース１１の後方に突出し、この突出端部に前記後輪伝動ケース２４、２４に伝動する左右後輪伝動軸３５、３５が接続されている。そして、この左右後輪伝動軸３５、３５により各々左右後輪７、７が駆動回転される構成となっている。 Rear end portions of the rear output shafts 11a and 11b protrude rearward of the transmission case 11, and left and right rear wheel transmission shafts 35 and 35 that are transmitted to the rear wheel transmission cases 24 and 24 are connected to the protruding end portions. The left and right rear wheels 7 and 7 are driven and rotated by the left and right rear wheel transmission shafts 35 and 35, respectively.

苗植付装置３は、走行車両１に昇降用リンク装置２で昇降自在に装着されている。
走行車両１に基部が回動自在に設けられた一般的なリフトシリンダー３６（図１）のピストン上端部を昇降用リンク装置２に連結し、走行車両１に設けた油圧ポンプ１３にて昇降バルブ（図示せず）を介してリフトシリンダー３６に圧油を供給・排出して、リフトシリンダー３６のピストンを伸進・縮退させて昇降用リンク装置２に連結した苗植付装置３が上下動されるように構成されている。 The seedling planting device 3 is mounted on the traveling vehicle 1 so as to be movable up and down by a lifting and lowering link device 2.
The upper end of a piston of a general lift cylinder 36 (FIG. 1) whose base is rotatably provided on the traveling vehicle 1 is connected to the lifting link device 2, and the lifting valve is operated by a hydraulic pump 13 provided on the traveling vehicle 1. The seedling planting device 3 connected to the lifting link device 2 is moved up and down by supplying and discharging pressure oil to and from the lift cylinder 36 (not shown), and extending and retracting the piston of the lift cylinder 36. It is comprised so that.

苗植付装置３は、左右フレーム３７を介して昇降用リンク装置２の後部にローリング自在に装着されたフレームを兼ねる植付伝動ケース３８と、該植付伝動ケース３８に設けられた支持部材に支持されて機体左右方向に往復動する苗載台３９と、植付伝動ケース３８の後端部に装着され、苗載台３９の下端より１株づつ苗を圃場に植え付ける苗植付具４１と、植付伝動ケース３８の下部にその後部が枢支されてその前部が上下揺動自在に装着された整地体であるセンター（センサー）フロート４２とサイドフロート４３等にて構成されている。センターフロート４２とサイドフロート４３は、圃場を整地すると共に苗植付具４１により苗が植付けられる圃場の前方を整地すべく設けられている。ＰＴＯ伝動軸４０（図示せず）は両端にユニバーサルジョイントを有し、ミッションケース１１からの動力を苗植付装置３の植付伝動ケース３８に伝達すべく設けている。また、昇降リンクセンサ５１（図１）は、メインフレーム１０ａ，１０ｂに立設した昇降リンク基部フレーム１５と昇降用リンク装置２の上下動する昇降用の平行リンク部材２ａ、２ｂの間に設けられ、リンク７９の動きを検出するポテンショメータであり、手動操作等により苗植付装置３を最上昇位置へ上昇したことを検出できる。 The seedling planting device 3 includes a planting transmission case 38 that also serves as a frame mounted on the rear part of the lifting link device 2 via the left and right frames 37 so as to be freely rollable, and a support member provided in the planting transmission case 38. A seedling mounting table 39 that is supported and reciprocates in the left-right direction of the machine, and a seedling planting tool 41 that is attached to the rear end portion of the planting transmission case 38 and plants seedlings one by one from the lower end of the seedling mounting table 39 to the field. The planting transmission case 38 includes a center (sensor) float 42, a side float 43, and the like, which are leveling bodies whose rear part is pivotally supported at the lower part of the planting transmission case 38 and whose front part is swingable up and down. The center float 42 and the side float 43 are provided so as to level the field and level the front of the field where the seedling is planted by the seedling planting tool 41. The PTO transmission shaft 40 (not shown) has universal joints at both ends, and is provided to transmit power from the transmission case 11 to the planting transmission case 38 of the seedling planting device 3. The lifting link sensor 51 (FIG. 1) is provided between the lifting link base frame 15 erected on the main frames 10a and 10b and the lifting and lowering parallel link members 2a and 2b that move up and down. The potentiometer for detecting the movement of the link 79 can detect that the seedling planting device 3 has been raised to the highest position by manual operation or the like.

そして、センターフロート４２の前部に設けられた迎え角センサ（図示せず）は、苗植付装置３の対地高さを検出するものであり、該迎え角センサの検出値に基づいて、図示しない制御装置により昇降バルブを制御してリフトシリンダー３６にて苗植付装置３の上下位置を制御するように構成されている。 An angle-of-attack sensor (not shown) provided at the front portion of the center float 42 detects the height of the seedling planting device 3 with respect to the ground, and is illustrated based on the detection value of the angle-of-attack sensor. The lift valve 36 is controlled by a control device that does not, and the vertical position of the seedling planting device 3 is controlled by the lift cylinder 36.

即ち、センターフロート４２の前部が外力にて適正範囲以上に持ち上げられたことを迎え角センサにより検出した時には油圧ポンプ１３にてミッションケース１１内から汲み出された圧油をリフトシリンダー３６に送り込んでピストンを突出させて昇降用リンク装置２を上動させて苗植付装置３を所定位置まで上昇させ、また、センターフロート４２の前部が適正範囲以下に下がったことを迎え角センサにより検出した時にはリフトシリンダー３６内の圧油をミッションケース１１内に戻して昇降用リンク装置２を下動させて苗植付装置３を所定位置まで下降させる。 That is, when it is detected by the angle-of-attack sensor that the front part of the center float 42 has been lifted beyond the appropriate range by an external force, the hydraulic oil pumped out from the transmission case 11 by the hydraulic pump 13 is sent to the lift cylinder 36. The piston is protruded to move the lifting link device 2 upward to raise the seedling planting device 3 to a predetermined position, and the angle of attack sensor detects that the front part of the center float 42 has fallen below the proper range. When this occurs, the pressure oil in the lift cylinder 36 is returned into the mission case 11 and the lifting link device 2 is moved downward to lower the seedling planting device 3 to a predetermined position.

そして、センターフロート４２の前部が適正範囲にあるとき（迎え角センサの検出値が適正範囲にあり、苗植付装置３が適正な対地高さである時）には、リフトシリンダー３６内の圧油の出入りを止めて苗植付装置３を一定位置に保持させている。 When the front part of the center float 42 is in the proper range (when the detected value of the angle of attack sensor is in the proper range and the seedling planting device 3 has the proper ground height), the inside of the lift cylinder 36 is The seed oil planting apparatus 3 is held at a fixed position by stopping the pressure oil from entering and exiting.

このように、センターフロート４２を苗植付装置３の自動高さ制御のための接地センサーとして用いている。
苗植付装置３は４条植の構成で、フレームを兼ねる植付伝動ケース３８、苗を載せて左右往復動し苗を一株づつ各条の苗取出口３９ａ（図２）に供給する苗載台３９、苗取出口３９ａに供給された苗を圃場に植付ける苗植付具４１等を備えている。なお、苗載台３９には機体前方に取り付けた予備苗載台９９から苗を供給することができる。 Thus, the center float 42 is used as a ground sensor for automatic height control of the seedling planting device 3.
The seedling planting device 3 has a four-row planting structure, a seedling transmission case 38 that also serves as a frame, and a seedling that carries seedlings and reciprocates left and right to feed seedlings one by one to the seedling outlet 39a (FIG. 2). A seedling planting tool 41 and the like for planting seedlings supplied to the mounting table 39 and the seedling outlet 39a in the field are provided. The seedling stage 39 can be supplied with seedlings from a preliminary seedling stage 99 attached to the front of the machine body.

図１に示すように、センターフロート４２の前方にはロータ７０ａが配置され、該ロータ７０ａはサイドフロート４３の前方にあるロータ７０ｂより前方に配置されている。ロータ７０ａは後輪７の伝動ケース２４内のギアから伝動軸２５を介して動力が伝達され、ロータ７０ｂは両方のロータ７０ａ，７０ａの駆動軸（図示せず）からそれぞれ動力が伝達される左右一対のチェーンケース７１，７１内の一対のチェーン（図示せず）から動力伝達される。また、ロータ７０ａは梁部材７３に上端部が支持された一対のリンク部材７６，７７によりスプリング７８を介して吊り下げられている。 As shown in FIG. 1, a rotor 70 a is disposed in front of the center float 42, and the rotor 70 a is disposed in front of the rotor 70 b in front of the side float 43. The rotor 70a receives power from the gear in the transmission case 24 of the rear wheel 7 via the transmission shaft 25, and the rotor 70b transmits power from the drive shafts (not shown) of both the rotors 70a and 70a. Power is transmitted from a pair of chains (not shown) in the pair of chain cases 71, 71. The rotor 70a is suspended through a spring 78 by a pair of link members 76, 77 whose upper ends are supported by the beam member 73.

前記一対のリンク部材７６，７７は梁部材７３に一端部が固着支持された第一リンク部材７６と該第一リンク部材７６の他端部に一端が回動自在に連結した第二リンク部材７７からなり、該第二リンク部材７７の他端部と図示しない補強部材に回動自在に支持された取付片との間に前記スプリング７８が接続している。 The pair of link members 76 and 77 are a first link member 76 whose one end is fixedly supported by the beam member 73 and a second link member 77 whose one end is rotatably connected to the other end of the first link member 76. The spring 78 is connected between the other end of the second link member 77 and a mounting piece rotatably supported by a reinforcing member (not shown).

また、ロータ上下位置調節レバー８１の下端部は支持枠体７２に回動自在に支持されている。第一リンク部材７６の上方への回動により第二リンク部材７７とスプリング７８を介してロータ７０ａを上方に上げることができる。詳細は省略するが、ロータ７０ａを上方に移動させると、ロータ７０ｂも同時に上方に移動する機構になっている。 Further, the lower end portion of the rotor vertical position adjusting lever 81 is rotatably supported by the support frame 72. By rotating the first link member 76 upward, the rotor 70a can be raised upward via the second link member 77 and the spring 78. Although details are omitted, when the rotor 70a is moved upward, the rotor 70b is also moved upward at the same time.

施肥装置４は、肥料タンク６７内の肥料を肥料繰出部６８によって一定量づつ下方に繰り出し、その繰り出された肥料をブロア６９により施肥ホース６２を通して施肥ガイド８０まで移送し、該施肥ガイド８０の前側に設けた作溝体８２によって苗植付条の側部近傍に形成される施肥溝内に落とし込むようになっている。 The fertilizer applicator 4 feeds the fertilizer in the fertilizer tank 67 downward by a fixed amount by the fertilizer feed section 68, and transfers the fed fertilizer to the fertilizer guide 80 through the fertilizer hose 62 by the blower 69, and the front side of the fertilizer guide 80 It is made to drop in the fertilization groove formed in the side part vicinity of a seedling planting strip by the grooving body 82 provided in.

また、ペダル８６（図２）はメインクラッチと左右後輪ブレーキ装置（図示せず）を共に操作することができ、ステアリングハンドル１６の右下側に配置されており、このペダル８６を踏み込むとメインクラッチが切れ、続いて左右後輪ブレーキがかかり、機体は停止する。 Further, the pedal 86 (FIG. 2) can operate both the main clutch and the left and right rear wheel brake devices (not shown), and is disposed on the lower right side of the steering handle 16. When the pedal 86 is depressed, the main The clutch is disengaged, the left and right rear wheel brakes are applied, and the aircraft stops.

また、機体の前方にはフロントアーム８８を突設し、フロントアーム８８の先端部からフロントアーム８８内にセンターマスコット８９を挿脱自在に取り付けて、フロントアーム８８とセンターマスコット８９を一体化し、センターマスコット８９の先端にランプ８９ａを設けて、フロントアーム８８とセンターマスコット８９を１本のレバーとする。また、ステップフロア１９の前方両サイドにはサイドマーカ４４が設けられている。 In addition, a front arm 88 projects from the front of the fuselage, and a center mascot 89 is detachably attached to the front arm 88 from the front end of the front arm 88, and the front arm 88 and the center mascot 89 are integrated. A ramp 89a is provided at the tip of the mascot 89, and the front arm 88 and the center mascot 89 serve as one lever. Further, side markers 44 are provided on both front sides of the step floor 19.

後輪７の伝動ケース２４は左右フレーム３７の左右両端部に取り付けて、後輪支持体３０に軸支されている。
昇降リンク基部フレーム１５には後輪強制下降用の油圧シリンダ９２の一端が連結されている。前記油圧シリンダ９２のピストン９２ａの先端部は伝動ケース２４に係止されている。 The transmission case 24 of the rear wheel 7 is attached to the left and right ends of the left and right frames 37 and is pivotally supported by the rear wheel support 30.
One end of a hydraulic cylinder 92 for forced lowering of the rear wheel is connected to the lift link base frame 15. The tip of the piston 92 a of the hydraulic cylinder 92 is locked to the transmission case 24.

後輪伝動ケース２４の回動により後輪７の車軸２３は後輪伝動ケース２４と一体で上下動する。なお後輪伝動ケース２４にはミッションケース１１から左右後輪伝動軸３５を介して動力が伝達される。 As the rear wheel transmission case 24 rotates, the axle 23 of the rear wheel 7 moves up and down integrally with the rear wheel transmission case 24. Power is transmitted to the rear wheel transmission case 24 from the transmission case 11 via the left and right rear wheel transmission shafts 35.

また、左右の後輪支持体３０に後方に向けて取り付けられた弾性ゴム支持アーム９３の先端と後輪伝動ケース２４の上面との間にスプリング９４を設け、該アーム９３と後輪伝動ケース２４の上方部位との間に弾性ゴム体９６を取り付ける。 Further, a spring 94 is provided between the front end of the elastic rubber support arm 93 attached to the left and right rear wheel supports 30 rearward and the upper surface of the rear wheel transmission case 24, and the arm 93 and the rear wheel transmission case 24 are provided. An elastic rubber body 96 is attached between the upper portion of the elastic rubber member 96 and the upper portion thereof.

従って前進高負荷時に後輪７を左右独立して進行方向に回動させる際に生じる駆動反力により、後輪伝動ケース２４が回動支点軸２４ａを中心に下方に駆動されて自動的に走行車両１の後部側が上昇する。 Therefore, the rear wheel transmission case 24 is driven downward about the rotation fulcrum shaft 24a by the reaction force generated when the rear wheel 7 is rotated in the traveling direction independently at the left and right during forward high load, and automatically travels. The rear side of the vehicle 1 rises.

図３と図４に肥料タンク６７とその周辺の肥料搬送用ダクト類の構成図（図３は背面図、図４は平面図）を示す。肥料を貯留する肥料タンク６７内で残った肥料を排出する肥料排出ダクト（肥料排出流路）３４を搬送風ダクト３３とは別に設け、肥料タンク６７の後部に搬送風ダクト３３又は肥料排出ダクト３４へ接続する排出口６７ｂを設け、肥料タンク６７内にブロア６９からの搬送風を（直接）送り込む肥料流入ダクト（分岐ダクト）４５と該肥料流入ダクト４５の出口部を開閉し、肥料タンク６７内に搬送風を間欠的に送り込む開閉弁４７を肥料流入ダクト４５の中間部に設けた。搬送風ダクト３３は肥料タンク６７の下方前側に配置し、肥料排出ダクト３４は肥料タンク６７の下方後側に配置した。 3 and 4 show a configuration diagram of the fertilizer tank 67 and the surrounding fertilizer transport ducts (FIG. 3 is a rear view, and FIG. 4 is a plan view). A fertilizer discharge duct (fertilizer discharge channel) 34 for discharging fertilizer remaining in the fertilizer tank 67 for storing fertilizer is provided separately from the transport wind duct 33, and the transport wind duct 33 or the fertilizer discharge duct 34 is provided at the rear of the fertilizer tank 67. A fertilizer inflow duct (branch duct) 45 that feeds the conveying air from the blower 69 (directly) into the fertilizer tank 67 and an outlet portion of the fertilizer inflow duct 45 are opened and closed. An on-off valve 47 for intermittently sending the conveying air is provided in the middle part of the fertilizer inflow duct 45. The conveying air duct 33 is disposed on the lower front side of the fertilizer tank 67, and the fertilizer discharge duct 34 is disposed on the lower rear side of the fertilizer tank 67.

肥料タンク６７内に肥料流入ダクト４５を経由してブロア６９からの搬送風が送り込まれることにより、肥料タンク６７内の肥料を空気の流れで撹拌すると共に、乾燥させることができる。こうして、肥料が自重や肥料タンク６７内の湿気によって塊になり、詰まることが防止されるため、肥料の供給や排出が滞ることが防止され、肥料不足の発生が防止されると共に、肥料の排出作業時間が長くなることが防止される。 When the conveying wind from the blower 69 is sent into the fertilizer tank 67 via the fertilizer inflow duct 45, the fertilizer in the fertilizer tank 67 can be agitated by the flow of air and dried. In this way, the fertilizer is prevented from clogging due to its own weight or moisture in the fertilizer tank 67, so that the supply and discharge of the fertilizer is prevented from being delayed, the occurrence of fertilizer shortage is prevented, and the discharge of fertilizer is prevented. Long working hours are prevented.

また肥料タンク６７に接続した肥料流入ダクト４５の中間部に設けた開閉弁４７によって肥料流入ダクト４５を開閉させ、肥料タンク６７内に搬送風が入らないタイミングを生じさせることにより肥料が浮き上がり、繰出部６８や排出口（開口部）６７ｂに移動しなくなることを防止することができるので、肥料の供給や排出が滞ることが防止され、肥料不足の発生が防止されると共に、肥料の排出作業時間が長くなることが防止される。 Further, the fertilizer floats and is fed out by opening and closing the fertilizer inflow duct 45 by an on-off valve 47 provided in the middle part of the fertilizer inflow duct 45 connected to the fertilizer tank 67 and generating a timing at which the conveying wind does not enter the fertilizer tank 67. Since it can prevent that it stops moving to the part 68 and the discharge port (opening part) 67b, it is prevented that supply and discharge | emission of fertilizer is overdue, generation | occurrence | production of a fertilizer shortage is prevented, and the discharge work time of a fertilizer Is prevented from becoming longer.

肥料流入ダクト４５は、搬送風ダクト３３または排出搬送ダクト３４を分岐させて構成するが、図３と図４には搬送風ダクト３３に肥料流入ダクト４５を取り付けた場合を図示している。また図４に示す構成の場合には肥料流入ダクト４５の中間部に開閉弁４７を設けている。開閉弁４７は、該開閉弁４７に連結した第１電動モータ軸４９ａを第１電動モータ４９で作動制御することで摺動させて開閉する。 The fertilizer inflow duct 45 is configured by branching the transport wind duct 33 or the discharge transport duct 34, and FIGS. 3 and 4 illustrate the case where the fertilizer inflow duct 45 is attached to the transport wind duct 33. In the case of the configuration shown in FIG. 4, an on-off valve 47 is provided in the middle part of the fertilizer inflow duct 45. The on-off valve 47 opens and closes by sliding the first electric motor shaft 49 a connected to the on-off valve 47 by controlling the operation of the first electric motor 49.

こうして、肥料流入ダクト４５を搬送風ダクト３３または排出搬送ダクト３４から分岐させて構成したことにより、肥料流入ダクト４５の配置構成が複雑化することを防止できるので、施肥装置４（肥料タンク６７、繰出部６８、ブロア６９、肥料流入ダクト４５、搬送風ダクト３３及び排出搬送ダクト３４などから構成される）の構成が簡潔になる。 Thus, since the fertilizer inflow duct 45 is branched from the transport wind duct 33 or the discharge transport duct 34, it is possible to prevent the arrangement configuration of the fertilizer inflow duct 45 from being complicated, so that the fertilizer application device 4 (fertilizer tank 67, The configuration of the feeding unit 68, the blower 69, the fertilizer inflow duct 45, the transport wind duct 33, the discharge transport duct 34, and the like is simplified.

また、肥料流入ダクト４５と搬送風ダクト３３または排出搬送ダクト３４の分岐部に開閉弁４７を設けたことにより、肥料の供給作業、または肥料の排出作業をしながら肥料タンク６７内に搬送風を送り込むことができるので、肥料の撹拌や乾燥を別工程として行う必要が無く、作業能率が従来技術より向上する。 In addition, by providing an on-off valve 47 at the branching portion of the fertilizer inflow duct 45 and the transport wind duct 33 or the discharge transport duct 34, the transport wind is fed into the fertilizer tank 67 while supplying fertilizer or discharging the fertilizer. Since it can be fed, it is not necessary to stir and dry the fertilizer as a separate process, and the work efficiency is improved as compared with the prior art.

肥料タンク６７内に、内部の湿度を検出する第１湿度センサ４８ａを設け、該第１湿度センサ４８ａが所定値以上の湿度（例：７０％）を検知すると前記開閉弁４７を開き、第１湿度センサ４８ａが前記所定値未満の湿度を検知すると、開閉弁４７を閉じる制御を第１電動モータ４９を用いて行う制御装置１００を設けた。上記開閉弁４７の開閉のハンチングを防ぐために開閉弁４７を開く時の所定湿度と閉じる時の所定湿度を別々に設定してもよい。 A first humidity sensor 48a for detecting internal humidity is provided in the fertilizer tank 67. When the first humidity sensor 48a detects a humidity (for example, 70%) equal to or higher than a predetermined value, the on-off valve 47 is opened, and the first humidity sensor 48a is opened. When the humidity sensor 48a detects the humidity less than the predetermined value, the control device 100 is provided that uses the first electric motor 49 to close the on-off valve 47. In order to prevent the opening / closing hunting of the on-off valve 47, a predetermined humidity when the on-off valve 47 is opened and a predetermined humidity when the on-off valve 47 is closed may be set separately.

こうして、肥料タンク６７内の湿度に合わせて開閉弁４７が開閉する構成としたことにより、湿度が高いときにだけ肥料タンク６７内に搬送風が入り込んで内部の湿気を追い出し、肥料の乾燥を行うことができるので、肥料の詰まりが防止され、作業能率が従来以上に向上すると共に、いろいろな流路に詰まった肥料の除去作業が不要となる。 Thus, by adopting a configuration in which the on-off valve 47 opens and closes in accordance with the humidity in the fertilizer tank 67, the conveying wind enters the fertilizer tank 67 only when the humidity is high, expels the internal humidity, and the fertilizer is dried. Therefore, the clogging of the fertilizer is prevented, the work efficiency is improved more than before, and the removal work of the fertilizer clogged in various flow paths becomes unnecessary.

また、湿度が下がると肥料流入ダクト４５が閉じられて搬送風が移動しなくなることにより、肥料タンク６７の排出口（開口部）６７ｂへの搬送又は肥料タンク６７から肥料の圃場への搬送に十分な風量を供給することができるので、肥料不足が防止されて作物の生育が良好になると共に、肥料の排出作業に要する時間が軽減される。 Further, when the humidity is lowered, the fertilizer inflow duct 45 is closed and the transport wind does not move, so that it is sufficient for transport to the discharge port (opening) 67b of the fertilizer tank 67 or transport of the fertilizer from the fertilizer tank 67 to the field. Since a sufficient amount of air can be supplied, the shortage of fertilizer is prevented, the growth of crops is improved, and the time required for the discharge of fertilizer is reduced.

前記開閉弁４７は、第１湿度センサ４８ａが所定値（例えば７０％）以上の湿度を検知すると、間欠的に開閉し、湿度が前記所定値未満になると開閉を停止して閉まる制御が制御装置１００で行われる。なお、この場合も開閉弁４７の開閉のハンチングを防ぐために開閉弁４７の間欠開閉を行うときの所定湿度と間欠開閉を停止する所定湿度を別々に設定してもよい。 The on-off valve 47 is controlled to open / close intermittently when the first humidity sensor 48a detects a humidity of a predetermined value (for example, 70%) or more, and to stop opening / closing when the humidity falls below the predetermined value. At 100. In this case as well, in order to prevent hunting of the opening / closing of the on-off valve 47, a predetermined humidity when the on-off valve 47 is intermittently opened and a predetermined humidity at which the intermittent opening / closing is stopped may be set separately.

そのため、肥料タンク６７内部の湿度が所定値以上であるとき、開閉弁４７を間欠的に開くことにより、肥料タンク６７内に過度の搬送風が入り込むことを防止できるので、肥料が舞い上がって繰出部６８や排出口６７ｂから離れることが防止され、肥料の供給や排出が確実且つ能率的に行われる。 Therefore, when the humidity inside the fertilizer tank 67 is equal to or higher than a predetermined value, by opening the on-off valve 47 intermittently, it is possible to prevent excessive transport air from entering the fertilizer tank 67, so that the fertilizer rises and is fed out. 68 and the discharge port 67b are prevented from being separated, so that fertilizer can be supplied and discharged reliably and efficiently.

また、搬送風が間欠的に肥料流入ダクト４５に移動することにより、湿度が所定値よりも高い間中、肥料を圃場に搬送する搬送風ダクト３３と余った肥料を圃場に捨てる肥料排出ダクト３４への送風を確実に行うことで、肥料搬送力が弱くなって、肥料の搬送能率が低下することが防止される。 Further, by intermittently moving the transport wind to the fertilizer inflow duct 45, the transport wind duct 33 for transporting the fertilizer to the field and the fertilizer discharge duct 34 for discarding the remaining fertilizer to the field while the humidity is higher than a predetermined value. By reliably blowing air to the fertilizer, it is possible to prevent the fertilizer transport force from being weakened and the fertilizer transport efficiency from decreasing.

肥料タンク６７の外側に、外気の湿度を検知する第２湿度検知部材（４８ｂ）を設け、前記第１湿度センサ４８ａと第２湿度センサ４８ｂの湿度を比較し、前記２つの湿度の差が設定値よりも大きくなると、開閉弁４７を作動（間欠的に開閉）させる制御構成を制御装置１００に設けた。図５に前記制御機構のブロック図を示す。 A second humidity detecting member (48b) for detecting the humidity of the outside air is provided outside the fertilizer tank 67, and the humidity of the first humidity sensor 48a and the second humidity sensor 48b is compared, and the difference between the two humidity is set. The control device 100 is provided with a control configuration that activates (opens and closes) the on-off valve 47 when the value exceeds the value. FIG. 5 shows a block diagram of the control mechanism.

これは、前記第１湿度センサ４８ａと第２湿度センサ４８ｂの湿度の差は、絶対値で判断し、例えば、外気は低湿でも肥料タンク６７内部が高湿であるときは当然乾燥が必要であり、逆に肥料タンク６７内は低湿でも外気が高湿であるときは、肥料補充時に湿気が進入することを考慮し、肥料を普段より乾燥気味にする必要がある。 This is because the difference in humidity between the first humidity sensor 48a and the second humidity sensor 48b is determined by an absolute value. For example, when the outside air is low in humidity and the inside of the fertilizer tank 67 is high in humidity, it is naturally necessary to dry. On the other hand, if the inside of the fertilizer tank 67 is low humidity but the outside air is high, it is necessary to make the fertilizer more dry than usual considering that moisture enters when the fertilizer is replenished.

こうして肥料タンク６７の内外の湿度を検知し、その差が大きいときに開閉弁４７を作動させて肥料流入ダクト４５から搬送風が肥料タンク６７内に入り込む構成としたことにより、肥料を圃場に供給する搬送風ダクト３３と余った肥料を捨てるための肥料排出ダクト３４への搬送風の供給量が低下することを一層防止できるので、搬送風が弱く肥料の搬送能率が低下することが防止される。 In this way, the humidity inside and outside the fertilizer tank 67 is detected, and when the difference is large, the on-off valve 47 is operated to feed the fertilizer into the fertilizer tank 67 from the fertilizer inflow duct 45, thereby supplying the fertilizer to the field. Since it can further prevent that the supply amount of the conveyance wind to the fertilizer discharge | emission duct 34 for throwing away the surplus fertilizer and the conveyance wind duct 33 to perform, it can prevent that a conveyance wind is weak and the conveyance efficiency of a fertilizer falls. .

図６に示すように、施肥装置４の作動部を動かすために設けた走行車体１のエンジン１２と該エンジン１２の駆動で生じる熱風を移動させるラジエータ５０のファン５０ａとラジエータファン５０ａと肥料タンク６７の左右一側端部を連結する送熱ダクト５５と肥料タンク６７の左右他側端部とブロア６９を連結する連結ダクト５２を設けた構成にしても良い。 As shown in FIG. 6, the engine 12 of the traveling vehicle body 1 provided to move the operating portion of the fertilizer application device 4, the fan 50 a of the radiator 50 that moves hot air generated by driving the engine 12, the radiator fan 50 a, and the fertilizer tank 67. It is also possible to employ a configuration in which a heat supply duct 55 that connects the left and right ends of the left and right ends of the fertilizer tank 67 and a connecting duct 52 that connects the blower 69 is provided.

エンジン１２の発する熱風を送熱ダクト５５を経由して肥料タンク６７内に送り込むことにより、高温で肥料の水分を除去することができるので、肥料同士が水分で固まり合うことが防止され、肥料が詰まって供給されなくなることが防止される。 By sending the hot air generated by the engine 12 into the fertilizer tank 67 via the heat transfer duct 55, the moisture of the fertilizer can be removed at a high temperature. The clogging is prevented from being stopped.

また肥料タンク６７から排出される熱風を第１連結ダクト５２を経由してブロア６９に送り込むことにより、搬送風ダクト３３に熱風を供給することができるので、肥料繰出部６８から繰り出される肥料や、肥料タンク６７の排出口６７ｂから排出される肥料が塊になって詰まることが防止され、作業能率が向上すると共に、詰まった肥料を除去する作業が不要となり、作業者の労力が軽減される。 Further, by sending the hot air discharged from the fertilizer tank 67 to the blower 69 via the first connection duct 52, hot air can be supplied to the conveying air duct 33, so that the fertilizer fed from the fertilizer feeding unit 68, It is prevented that the fertilizer discharged from the discharge port 67b of the fertilizer tank 67 becomes a lump and is clogged, the work efficiency is improved, the work of removing the clogged fertilizer becomes unnecessary, and the labor of the operator is reduced.

また、図６に示すように、ブロア６９と搬送風ダクト３３の間に、湿気を除去する除湿フィルタ５３を設け、該除湿フィルタ５３よりも下手側の第２連結ダクト６３を、マフラ５６の上方に位置させた。 Further, as shown in FIG. 6, a dehumidifying filter 53 for removing moisture is provided between the blower 69 and the conveying air duct 33, and the second connecting duct 63 on the lower side of the dehumidifying filter 53 is disposed above the muffler 56. Was located.

こうして、除湿フィルタ５３をブロア６９と搬送風ダクト３３の間に設けたことにより、熱風内に混入した肥料タンク６７内の湿気を取り除いてから搬送風ダクト３３に移動させることができるので、供給または排出される肥料が湿気で塊になることが防止され、作業能率が従来より向上すると共に、詰まった肥料を除去する作業が不要となり、作業者の労力が軽減される。 Thus, by providing the dehumidifying filter 53 between the blower 69 and the conveying air duct 33, the moisture in the fertilizer tank 67 mixed in the hot air can be removed and then moved to the conveying air duct 33. The discharged fertilizer is prevented from becoming a mass due to moisture, and the work efficiency is improved as compared with the prior art, and the work of removing the clogged fertilizer is not required, and the labor of the operator is reduced.

除湿フィルタ５３よりも搬送風の移動経路の下手側の第２連結ダクト６３を、マフラ５６の上方に位置させたことにより、ブロア６９により生じる搬送風を再加熱することができるので、供給または排出される肥料が乾燥しやすくなる。 Since the second connection duct 63 on the lower side of the transport path of the transport air than the dehumidifying filter 53 is positioned above the muffler 56, the transport air generated by the blower 69 can be reheated, so that supply or discharge is performed. The fertilizer that is made becomes easy to dry.

エンジン１２から搬送風ダクト３３への熱風の移動を切り替えると共に、肥料の比重を検知する比重センサ５８を肥料タンク６７内に配置し、比重センサ５８の検知した比重が所定値（例えば、ｇ／ｍ^３当たり、投入時から３〜５％増）以上になると、肥料が吸湿したと判断して、第２電動モータ６０の回転数を上げて熱風の量を増やす構成とした。 While switching the movement of hot air from the engine 12 to the conveyance air duct 33, a specific gravity sensor 58 for detecting the specific gravity of the fertilizer is disposed in the fertilizer tank 67, and the specific gravity detected by the specific gravity sensor 58 is a predetermined value (for example, g / m ³ ), the fertilizer was judged to have absorbed moisture, and the number of hot air was increased by increasing the number of revolutions of the second electric motor 60.

このような構成にする場合に、肥料の比重が増加すると肥料が吸湿するほどの湿度であると判断し、第２電動モータ６０の回転数を上げて熱風の量を増やすことにより、湿度の変化が生じても肥料が湿気で塊になることを防止できるので、肥料タンク６７の排出口６７ｂから排出される肥料が塊になって詰まることが防止され、作業能率が向上すると共に、詰まった肥料を除去する作業が不要となり、作業者の労力が軽減される。 In such a configuration, when the specific gravity of the fertilizer increases, it is determined that the humidity is high enough to absorb the fertilizer, and the amount of hot air is increased by increasing the number of rotations of the second electric motor 60, thereby changing the humidity. Since it is possible to prevent the fertilizer from becoming clumped due to moisture even if it occurs, the fertilizer discharged from the discharge port 67b of the fertilizer tank 67 is prevented from clogging as a lump, improving work efficiency and clogging fertilizer This eliminates the need for the work to remove the work, reducing the labor of the worker.

例えば図６に示すブロア６９の出口に接続する第２連結ダクト６３におけるブロア６９とのジョイント部の内周壁面に図７（ダクトの一部の斜視図（図７（ａ））とダクト開口部を見た図（図７（ｂ）））に示すような等間隔でダクト中心に向けたフィン６３ａを配置する構成を採用しても良い。この場合の多数のフィン６３ａを搬送風の進行方向に対して斜めに向けて配置することで、ブロア６９からの搬送風は第２連結ダクト６３内で回転しながら進行するので搬送風の直進性が高まり、第２連結ダクト６３が曲線流路を形成している場合でもスムーズに送風されるので、ブロアモータ（図示せず）がより小型化できる。 For example, FIG. 7 (a perspective view of a part of the duct (FIG. 7A) and a duct opening portion on the inner peripheral wall surface of the joint portion with the blower 69 in the second connecting duct 63 connected to the outlet of the blower 69 shown in FIG. A configuration in which the fins 63a facing the center of the duct are arranged at regular intervals as shown in FIG. 7B (FIG. 7B) may be adopted. By arranging a large number of fins 63a obliquely with respect to the traveling direction of the conveying air in this case, the conveying air from the blower 69 travels while rotating in the second connecting duct 63, so that the straightness of the conveying air is achieved. Since the air is smoothly blown even when the second connecting duct 63 forms a curved flow path, the blower motor (not shown) can be further downsized.

図８（ｃ）に側面図、図８（ｄ）に図８（ｃ）の背面図を示すように、従来は一対の後輪７，７を支持する後輪伝動ケース２４、２４（図１参照）をローリングフレーム３７の両端に取り付け、該ローリングフレーム３７と共に一対のフレーム部材６４を車体に取り付けている。そしてローリングフレーム３７の上側に一対の昇降リンク基部フレーム１５’，１５’を取り付けていた。 As shown in FIG. 8C, a side view and FIG. 8D, a rear view of FIG. 8C, conventionally, rear wheel transmission cases 24, 24 that support a pair of rear wheels 7, 7 (FIG. 1). Are attached to both ends of the rolling frame 37, and a pair of frame members 64 are attached to the vehicle body together with the rolling frame 37. A pair of lifting link base frames 15 ′ and 15 ′ are attached to the upper side of the rolling frame 37.

しかし、上記図８（ｃ）と図８（ｄ）に示す構成では、ローリングフレーム３７に対して後輪伝動ケース２４、２４（図１）の取り付けと昇降リンク基部フレーム１５’，１５’の取り付けを別々に行う必要があった。 However, in the configuration shown in FIG. 8C and FIG. 8D, the rear wheel transmission cases 24 and 24 (FIG. 1) are attached to the rolling frame 37 and the lift link base frames 15 ′ and 15 ′ are attached. Had to be done separately.

そこで、図８（ａ）の側面図、図８（ｂ）に図８（ａ）の背面図を示すように、ローリングフレーム３７と共に一対のフレーム部材６４を車体に取り付け、ローリングフレーム３７の両端に鉛直方向に向けて一対の昇降リンク基部フレーム１５，１５を取り付ける構成にする。 Therefore, as shown in a side view of FIG. 8A and a rear view of FIG. 8A, a pair of frame members 64 are attached to the vehicle body together with the rolling frame 37, and are attached to both ends of the rolling frame 37. A pair of elevating link base frames 15 and 15 are attached in the vertical direction.

この場合、昇降リンク基部フレーム１５，１５に後輪伝動ケース２４、２４を取り付けることができ、部品点数は図８（ｂ）に示す構成より少なくて済み、また組み立ても比較的容易となる。 In this case, the rear wheel transmission cases 24, 24 can be attached to the lift link base frames 15, 15, and the number of parts is less than that of the configuration shown in FIG. 8B, and the assembly is relatively easy.

図９（ｂ）の斜視図と図１０（ｂ）の側面図に示すように従来は一対の後輪７，７を支持する後輪伝動ケース２４、２４をローリングフレーム３７の両端に取り付け、該ローリングフレーム３７と共に一対のフレーム部材６４を車体に取り付け、ローリングフレーム３７の上側に一対の昇降リンク基部フレーム１５’，１５’を取り付けていた。 As shown in the perspective view of FIG. 9 (b) and the side view of FIG. 10 (b), conventionally, rear wheel transmission cases 24, 24 supporting a pair of rear wheels 7, 7 are attached to both ends of a rolling frame 37. A pair of frame members 64 are attached to the vehicle body together with the rolling frame 37, and a pair of lifting link base frames 15 ′ and 15 ′ are attached to the upper side of the rolling frame 37.

しかし、図９（ａ）の斜視図と図１０（ａ）の側面図に示すように、後輪伝動ケース２４、２４の中心部にローリングフレーム３７の両端に取り付け、後輪伝動ケース２４、２４の前側壁に前後フレーム６５，６５を取り付け、さらに後輪伝動ケース２４、２４の上側壁に一対の昇降リンク基部フレーム１５，１５を取り付けることができるように構成する。 However, as shown in the perspective view of FIG. 9 (a) and the side view of FIG. 10 (a), the rear wheel transmission cases 24, 24 are attached to both ends of the rolling frame 37 at the center of the rear wheel transmission cases 24, 24. The front and rear frames 65 and 65 are attached to the front side wall of the rear wheel, and the pair of elevating link base frames 15 and 15 can be attached to the upper side walls of the rear wheel transmission cases 24 and 24.

上記構成により前後フレーム６５，６５が前記ミッションケース１１等の機体前部に配置される重量物から受ける荷重と、ローリングフレーム３７がローリング時に受ける荷重と、昇降リンク基部フレーム１５，１５が苗植付部４を支持する昇降用リンク装置２から受ける荷重を受ける位置に後輪伝動ケース２４，２４を配置することができるので、各方向からの荷重を強固な部材（後輪伝動ケース２４，２４）で受ける構成となり、結果的に最小部材でフレームを構成することができる。 With the above configuration, the load received by the front and rear frames 65, 65 from a heavy object disposed at the front of the machine body such as the transmission case 11, the load received by the rolling frame 37 during rolling, and the lifting link base frames 15, 15 are seeded. Since the rear wheel transmission cases 24, 24 can be arranged at positions to receive the load received from the elevating link device 2 that supports the portion 4, the members (rear wheel transmission cases 24, 24) that are strong in the load from each direction. As a result, the frame can be configured with a minimum member.

本発明は、乗用型田植機などの作業機に適用できる。 The present invention can be applied to a working machine such as a riding rice transplanter.

１走行車両２昇降用リンク装置
２ａ、２ｂ平行リンク部材３苗植付装置
４施肥装置６前輪
７後輪１０ａ，１０ｂメインフレーム
１１ミッションケース１１ａ，１１ｂリヤ出力軸
１２エンジン１３油圧ポンプ
１４ステアリングポスト１５昇降リンク基部フレーム
１６ステアリングハンドル１７変速レバー
１８畦クラッチレバー１９ステップフロア
２０操縦席２２前輪支持ケース
２３後輪車軸２４後輪伝動ケース
２４ａ回動支点軸２５伝動軸
２７プーリ２８ベルト
２９プーリ３０後輪支持体
３１油圧式無段変速装置（ＨＳＴ）
３２ａ入力軸３２ｂ出力軸
３３搬送風ダクト３４肥料排出ダクト
３５左右後輪伝動軸３６リフトシリンダー
３７左右フレーム（ローリングフレーム）
３８植付伝動ケース３９苗載台
３９ａ苗取出口４１苗植付具
４２センターフロート４３サイドフロート
４４サイドマーカ４５肥料流入ダクト（分岐ダクト）
４７開閉弁４８ａ第１湿度センサ
４８ｂ第２湿度センサ４９第１電動モータ
５０ラジエータ５０ａラジエータファン
５１昇降リンクセンサ５２第１連結ダクト
５３除湿フィルタ５５送熱ダクト
５６マフラ５８比重センサ
６０第２電動モータ６２施肥ホース
６３第２連結ダクト６４フレーム部材
６５前後フレーム６７肥料タンク
６７ｂ排出口（開口部）６８肥料繰出部
６９ブロア７０ａ、７０ｂロータ
７１チェーンケース７２支持枠体
７３梁部材７６、７７リンク部材
７８スプリング７９リンク
８０施肥ガイド８１ロータ上下位置調節レバー
８２作溝体８６ペダル
８８フロントアーム８９センターマスコット
８９ａランプ９２油圧シリンダ
９３弾性ゴム支持アーム９４スプリング
９６弾性ゴム体９９予備苗載台
１００制御装置 DESCRIPTION OF SYMBOLS 1 Traveling vehicle 2 Elevating link apparatus 2a, 2b Parallel link member 3 Seedling planting apparatus 4 Fertilizer 6 Front wheel 7 Rear wheel 10a, 10b Main frame 11 Transmission case 11a, 11b Rear output shaft 12 Engine 13 Hydraulic pump 14 Steering post 15 Lifting link base frame 16 Steering handle 17 Shift lever 18 畦 Clutch lever 19 Step floor 20 Pilot seat 22 Front wheel support case 23 Rear wheel axle 24 Rear wheel transmission case 24a Rotating fulcrum shaft 25 Transmission shaft 27 Pulley 28 Belt 29 Pulley 30 Rear wheel Support 31 Hydraulic continuously variable transmission (HST)
32a Input shaft 32b Output shaft 33 Carrying air duct 34 Fertilizer discharge duct 35 Left and right rear wheel transmission shaft 36 Lift cylinder 37 Left and right frame (rolling frame)
38 Planting transmission case 39 Seedling stand
39a Seedling outlet 41 Seedling planting tool 42 Center float 43 Side float 44 Side marker 45 Fertilizer inflow duct (branch duct)
47 On-off valve 48a First humidity sensor 48b Second humidity sensor 49 First electric motor 50 Radiator 50a Radiator fan 51 Lifting link sensor 52 First connection duct 53 Dehumidifying filter 55 Heating duct 56 Muffler 58 Specific gravity sensor 60 Second electric motor 62 Fertilizer hose 63 Second connecting duct 64 Frame member 65 Front / rear frame 67 Fertilizer tank 67b Discharge port (opening) 68 Fertilizer feed 69 69 Blower 70a, 70b Rotor 71 Chain case 72 Support frame 73 Beam member 76, 77 Link member 78 Spring 79 Link 80 Fertilization guide 81 Rotor vertical position adjustment lever 82 Groove body 86 Pedal 88 Front arm 89 Center mascot 89a Ramp 92 Hydraulic cylinder 93 Elastic rubber support arm 94 Spring 96 Elastic rubber body 99備苗 platform 100 controller

Claims

A fertilizer tank (67) for storing fertilizer, a feeding section (68) for feeding the fertilizer falling to the lower part of the fertilizer tank (67) in a fixed amount, and an air flow in which the fertilizer transport wind moves below the fertilizer tank (67) In a fertilizer applying device provided with a channel (33) and a blower (69) which supplies conveyance air to a ventilation channel (33),
A fertilizer discharge channel (34) for discharging the fertilizer remaining in the fertilizer tank (67);
A discharge port (67b) of the fertilizer tank (67) connected to the air flow path (33) or the fertilizer discharge flow path (34) at the rear of the fertilizer tank (67);
A fertilizer inflow channel (45) for sending the conveying air from the blower (69) is provided in the fertilizer tank (67),
A seedling transplanting machine equipped with a fertilizer application device, wherein the fertilizer inflow channel (45) is provided with an on-off valve (47) for intermittently feeding the conveying air into the fertilizer tank (67).

The fertilizer inflow channel (45) is provided by branching the air flow channel (33) or the fertilizer discharge channel (34),
The fertilizer application device according to claim 1, further comprising an on-off valve (47) provided at a branching portion to the fertilizer inflow passage (45) in the blower passage (33) or the fertilizer discharge passage (34). Seedling transplanter.

In the fertilizer tank (67), a first humidity detection member (48a) for detecting the internal humidity is provided,
The on-off valve (47) is opened when the first humidity detecting member (48a) detects a humidity above a predetermined value, and the on-off valve (47) is detected when the first humidity detecting member (48a) detects a humidity below the predetermined value. A seedling transplanter equipped with a fertilizer application device according to claim 1 or 2, further comprising a control device (100) for performing control for closing the first fertilizer using a first electric motor (49).

The on-off valve (47) is controlled to open and close intermittently when the first humidity detecting member (48a) detects a humidity not lower than a predetermined value, and to stop and close when the humidity falls below the predetermined value. A seedling transplanting machine equipped with a fertilizer application device according to claim 3, characterized in that a device (100) is provided.

On the outside of the fertilizer tank (67), a second humidity detecting member (48b) for detecting the humidity of the outside air is provided,
When the humidity of the first humidity detection member (48a) and the second humidity detection member (48b) are compared, and the difference in humidity becomes larger than a set value, a control configuration for operating the on-off valve (47) is provided. The seedling transplanting machine provided with the fertilizer applying device according to claim 3 or 4 characterized by things.

A driver (12) provided to move the operating part of the fertilizer applicator (4);
A heat transfer member (50a) for moving hot air generated by driving the driver (12);
A heat transfer channel (55) connecting the heat transfer member (50a) and the left and right ends of the fertilizer tank (67);
The seedling transplanter provided with the fertilizer application device according to claim 1, wherein a first connection channel (52) for connecting the left and right other side ends of the fertilizer tank (67) and the blower (69) is provided.

A dehumidifying filter (53) for removing moisture is provided between the blower (69) and the conveying air flow path (33),
The seedling transplanter equipped with a fertilizer application device according to claim 6, wherein the carrier air flow path (33) on the lower side of the dehumidifying filter (53) is positioned above the muffler (56).

The fertilizer tank (67) is provided with a specific gravity detection member (58) for detecting the specific gravity of the fertilizer,
The configuration according to claim 6 or 7, wherein when the specific gravity detected by the specific gravity detection member (58) exceeds a predetermined value, the number of hot air is increased by increasing the number of revolutions of the second electric motor (60). A seedling transplanter equipped with the described fertilizer application device.