この発明の実施の一形態の苗移植機を以下に説明する。
苗移植機８は、圃場に玉ねぎの苗を移植する苗移植機であり、図１の左側面図、図２の平面図、及び、図３の苗移植機後半部の左側面図に示すように、移植装置９を走行車体１０に装着した構成として、該走行車体１０により自走しながら移植装置９が圃場に苗を移植していくようになっている。
A seedling transplanter according to an embodiment of the present invention will be described below.
The seedling transplanting machine 8 is a seedling transplanting machine for transplanting onion seedlings to the field, as shown in the left side view of FIG. 1, the plan view of FIG. 2, and the left side view of the latter half of the seedling transplanting machine of FIG. In addition, as a configuration in which the transplanting device 9 is mounted on the traveling vehicle body 10, the transplanting device 9 transplants seedlings in the field while traveling by the traveling vehicle body 10.
なお、本明細書では苗移植機８の前進方向に向かって左右方向をそれぞれ左、右といい、前進側を前、後進側を後ということにする。
走行車体１０は、左右一対の駆動回転する前輪１１，１１と左右一対の駆動回転する後輪１２，１２を備え、操縦者が座る座席１３と、該座席１３の前方に配置されて操縦者が走行車体１０の進行方向を変更操作するために左右一対の前輪１１，１１を左右に変向操作する操縦ハンドル１４を備えている。
In the present specification, the left and right directions in the forward direction of the seedling transplanter 8 are referred to as left and right, respectively, the forward side is referred to as front, and the reverse side is referred to as rear.
The traveling vehicle body 10 includes a pair of left and right front wheels 11 and 11 and a pair of left and right rear wheels 12 and 12. The traveling vehicle body 10 is disposed in front of the seat 13. In order to change the traveling direction of the traveling vehicle body 10, a steering handle 14 is provided for turning the pair of left and right front wheels 11, 11 left and right.
エンジン２の動力は主伝動ベルト７０を介して走行伝動ケース７１内に伝達され、走行伝動ケース７１内からの動力が前輪１１及び後輪１２へ伝達されて機体が走行する。尚、後輪１２は、左右各々の後輪伝動ケース５０から支持され、該後輪伝動ケース５０内からの伝動で駆動する。左右の後輪伝動ケース５０は該左右の後輪伝動ケース５０間に設けた後輪ローリングフレーム４８に固着され、該後輪ローリングフレーム４８が機体に対して前後方向の軸回りに左右にローリング自在に取り付けられ、後輪１２が左右にローリングする。尚、後輪ローリングフレーム４８の左右両端部に後輪伝動ケース５０の機体左右方向内側で且つ略前後中央の外面を接合させた構成となっており、後輪ローリングフレーム４８の左右中央寄りの位置から若干機体左右方向内側に向くように斜め前側に延びる補助フレーム７２を固着し、更にこの補助フレーム７２の前端部と後輪伝動ケース５０の前端部とを繋ぐ連結フレーム７３を設けている。尚、連結フレーム７３は、機体左右方向外側ほど前側に位置するように斜めに配置されている。従って、後輪ローリングフレーム４８、補助フレーム７２、連結フレーム７３及び後輪伝動ケース５０で構成される平面視枠型のフレーム構造が左右各々構成され、後輪１２の支持強度が向上する。特に、後輪１２のトレッドが移植装置９の全植付け条（８条）を跨ぐために広くなるが、前記枠型のフレーム構造により後輪１２の支持強度を保持することができる。尚、前記枠型のフレーム構造を構成しない部分で後輪ローリングフレーム４８を伸縮させて後輪１２のトレッドを変更可能に構成した場合、後輪１２のトレッドに拘らず前記枠型のフレーム構造により後輪１２の支持強度を保持することができる。
The power of the engine 2 is transmitted into the traveling transmission case 71 via the main transmission belt 70, and the power from the traveling transmission case 71 is transmitted to the front wheels 11 and the rear wheels 12 so that the airframe travels. The rear wheel 12 is supported from the left and right rear wheel transmission cases 50 and is driven by transmission from the rear wheel transmission case 50. The left and right rear wheel transmission cases 50 are fixed to a rear wheel rolling frame 48 provided between the left and right rear wheel transmission cases 50, and the rear wheel rolling frame 48 can be rolled left and right about a longitudinal axis with respect to the aircraft. And the rear wheel 12 rolls left and right. The rear wheel rolling frame 48 has a structure in which the outer surface of the rear wheel transmission case 50 is joined to the left and right inner sides of the rear wheel transmission case 50 in the left and right direction of the body and substantially in the center of the front and rear. An auxiliary frame 72 that extends obliquely forward is slightly fixed so as to be slightly inward in the left-right direction of the machine body, and a connecting frame 73 that connects the front end portion of the auxiliary frame 72 and the front end portion of the rear wheel transmission case 50 is provided. The connecting frame 73 is disposed obliquely so that the outer side in the left-right direction of the machine body is located on the front side. Accordingly, the left and right frame structures of the rear wheel rolling frame 48, the auxiliary frame 72, the connecting frame 73, and the rear wheel transmission case 50 are respectively configured, and the support strength of the rear wheel 12 is improved. In particular, the tread of the rear wheel 12 is widened because it straddles all the planting strips (eight strips) of the transplanting device 9, but the support strength of the rear wheels 12 can be maintained by the frame-type frame structure. When the rear wheel rolling frame 48 is expanded and contracted at a portion not constituting the frame type frame structure so that the tread of the rear wheel 12 can be changed, the frame type frame structure is used regardless of the tread of the rear wheel 12. The support strength of the rear wheel 12 can be maintained.
走行伝動ケース７１内から後輪伝動ケース５０内への伝動構成について説明すると、走行伝動ケース７１の後面から後側に延びる左右各々の後輪伝動軸７４により左右の連結フレーム７３内の機体左右方向内側部分に設けた駆動軸７５へ伝動され、連結フレーム７３内の駆動スプロケット７６、チェーン７７及び従動スプロケット７８を介して該連結フレーム７３内の機体左右方向外側部分に設けた従動軸７９へ伝動され、該従動軸７９の後部が後輪伝動ケース５０内の前端部分に挿入されて後輪伝動ケース５０内に伝動される構成となっている。尚、左右の後輪伝動軸７４は、後輪１２の左右ローリングを許容できるように、屈曲自在の継手８０を備えると共に、該軸７４方向に伸縮自在に構成されている。また、左右の後輪伝動軸７４は、後側へいくほど機体左右方向外側に位置するように斜めに配置されている。従って、この後輪伝動軸７４と同じ軸心で駆動軸７５が配置され、従動軸７９は駆動軸７５と平行に配置されるので、連結フレーム７３内のチェーン７７は連結フレーム７３の方向に平面視で斜めに配置される。このように、斜めに配置される後輪伝動軸７４に対応して駆動軸７５、従動軸７９及びチェーン７７等の伝動要素を斜めに配置したので、連結フレーム７３内の伝動において、ベベルギヤ等を設ける必要がなく、駆動スプロケット７６、チェーン７７及び従動スプロケット７８からなる簡素で安価な伝動要素で伝動機構を構成することができる。また、連結フレーム７３内の伝動機構により、後輪伝動軸７４から機体左右方向外側に伝動することができるので、後輪１２のトレッドが広くても、後輪伝動軸７４の斜め配置の角度をあまり大きくしないようにでき、ひいては継手８０の屈曲角度を小さくできて伝動効率を良好に維持することができる。尚、後輪伝動軸７４は、その前部が変向される左右の前輪１１間に配置されるため、前輪１１の切れ角を維持するためにあまり左右方向外側に配置できない事情がある。
The transmission configuration from the traveling transmission case 71 to the rear wheel transmission case 50 will be described. The left and right rear body transmission shafts 74 extending from the rear surface of the traveling transmission case 71 to the rear side of the left and right connecting frames 73 in the lateral direction of the body. It is transmitted to the drive shaft 75 provided in the inner portion, and is transmitted to the driven shaft 79 provided in the outer portion in the left-right direction of the machine body in the connection frame 73 through the drive sprocket 76, the chain 77 and the driven sprocket 78 in the connection frame 73. The rear portion of the driven shaft 79 is inserted into the front end portion of the rear wheel transmission case 50 and is transmitted into the rear wheel transmission case 50. The left and right rear wheel transmission shaft 74 includes a bendable joint 80 so as to allow the left and right rolling of the rear wheel 12, and is configured to be extendable in the direction of the shaft 74. In addition, the left and right rear wheel transmission shafts 74 are disposed obliquely so as to be positioned on the outer side in the left-right direction of the machine body as it goes rearward. Accordingly, since the drive shaft 75 is arranged with the same axis as the rear wheel transmission shaft 74 and the driven shaft 79 is arranged in parallel with the drive shaft 75, the chain 77 in the connection frame 73 is flat in the direction of the connection frame 73. It is arranged obliquely in view. In this way, since the drive elements such as the drive shaft 75, the driven shaft 79, and the chain 77 are arranged diagonally corresponding to the rear wheel transmission shaft 74 arranged diagonally, bevel gears and the like are transmitted in the transmission in the connecting frame 73. There is no need to provide the transmission mechanism, and the transmission mechanism can be configured with a simple and inexpensive transmission element including the drive sprocket 76, the chain 77, and the driven sprocket 78. Further, the transmission mechanism in the connecting frame 73 can transmit the rear wheel transmission shaft 74 outward in the lateral direction of the vehicle body. Therefore, even if the tread of the rear wheel 12 is wide, the angle of the diagonal arrangement of the rear wheel transmission shaft 74 can be adjusted. It is possible to prevent the joint 80 from becoming too large, and thus the bending angle of the joint 80 can be reduced, and the transmission efficiency can be maintained well. Since the rear wheel transmission shaft 74 is disposed between the left and right front wheels 11 whose front part is turned, there is a situation in which the rear wheel transmission shaft 74 cannot be disposed on the outer side in the left and right direction so as to maintain the cutting angle of the front wheel 11.
左右の前輪１１は、走行伝動ケース７１の左右両端部に構成された各々のアクスルケース部分８１を介して支持される。そして、図９に示すように、機体前部の左右両側に予備の苗箱を載置するための苗枠８２を設ける場合に、該苗枠８２を支持する苗枠フレーム８３は、左右方向に延びる主フレーム部分８３ａと該主フレーム部分８３ａの左右方向の適宜位置２箇所から下方に延びる各々の脚部分８３ｂとを設け、この脚部分８３ｂの下端をアクスルケース部分８１の適宜位置に固着して支持する。従って、前記主フレーム部分８３ａ、脚部分８３ｂ及びアクスルケース部分８１で機体正面視で枠型のフレーム構造が構成され、苗枠８２の支持強度ひいては前輪１１の支持強度の向上が図れる。
The left and right front wheels 11 are supported via respective axle case portions 81 formed on both left and right ends of the traveling transmission case 71. And as shown in FIG. 9, when providing the seedling frame 82 for mounting a spare seedling box on the left and right sides of the front part of the machine body, the seedling frame 83 that supports the seedling frame 82 is An extending main frame portion 83a and leg portions 83b extending downward from two appropriate positions in the left and right direction of the main frame portion 83a are provided, and the lower end of the leg portion 83b is fixed to an appropriate position of the axle case portion 81. To support. Therefore, the main frame portion 83a, the leg portion 83b, and the axle case portion 81 form a frame-type frame structure when viewed from the front of the machine body, and the support strength of the seedling frame 82 and thus the support strength of the front wheel 11 can be improved.
また、エンジン２の動力は伝動ベルト３を介して油圧ポンプ４に伝達され、油圧ポンプ４からの圧油が送られて後述する砕土装置４１が駆動される。走行車体１０の後部に昇降シリンダ１５により上下回動する一対のリンク１６ａ，１６ｂを備え、該リンク１６ａ，１６ｂにより移植装置９を昇降動可能に装着している。
Further, the power of the engine 2 is transmitted to the hydraulic pump 4 through the transmission belt 3, and the pressure oil from the hydraulic pump 4 is sent to drive a soil crushing device 41 described later. A pair of links 16a and 16b that are rotated up and down by an elevating cylinder 15 are provided at the rear part of the traveling vehicle body 10, and the transplanting device 9 is mounted so as to be movable up and down by the links 16a and 16b.
移植装置９にはＰＴＯ軸４３から移植装置９の伝動軸４２を介してエンジン動力が伝達される（図３）。また、移植装置９は、苗箱Ｃを収容して搬送する苗箱供給手段１７と該苗箱供給手段１７が供給する苗箱Ｃの各セル１（図５）から順次苗Ｎを取出す苗取出し手段ＰＵ（図５）と該苗取出し手段ＰＵが取出した苗Ｎを一つ一つ圃場に植付けていく苗植付け手段ＰＴ（図１、図３参照）を設けた構成としている。したがって、上記のごとく各セル１で育成した苗Ｎを有する苗箱Ｃを苗箱供給手段１７に装填すれば、苗箱Ｃの各セル１の苗Ｎは苗取出し手段ＰＵによって順次自動的に苗Ｎが取出されていって、そして、その取出された苗Ｎは苗植付け手段ＰＴによって一つ一つ畑圃場に植付けられていく。
Engine power is transmitted from the PTO shaft 43 to the transplantation device 9 via the transmission shaft 42 of the transplantation device 9 (FIG. 3). Further, the transplanting device 9 takes out the seedling N from the seedling box supply means 17 for accommodating and transporting the seedling box C and the cells 1 (FIG. 5) of the seedling box C supplied by the seedling box supply means 17. Means PU (FIG. 5) and seedling planting means PT (see FIGS. 1 and 3) for planting the seedlings N taken out by the seedling picking means PU one by one are provided. Therefore, if the seedling box C having the seedlings N grown in each cell 1 as described above is loaded into the seedling box supply means 17, the seedlings N in each cell 1 of the seedling box C are automatically and sequentially seeded by the seedling extraction means PU. N is taken out, and the taken out seedling N is planted one by one in the field by the seedling planting means PT.
なお、苗箱供給手段１７に収容して搬送する苗箱Ｃ内には、玉ねぎの苗を入れた小さなポット状のセル１を多数縦横に整列してあり、この苗箱Ｃは、ポリプロピレン等の合成樹脂により一体的に成型した可とう性のものである。このため、苗箱Ｃを苗箱供給手段１７で移送するとき、該苗箱供給手段１７の屈曲部でも曲がりながら移送可能となる。また、前記セル１の底面には三又状の底孔を設けており、この底孔により、育苗時に根が通過して置床に伸長させることができ、また育苗時にセル１内に灌水した水を排水することができ、更には苗取出し手段ＰＵの後述する苗押出し用のピン２４が苗を押し出すべく通過してセル１内に突入させることができる。
In the seedling box C accommodated and transported in the seedling box supply means 17, a large number of small pot-shaped cells 1 containing onion seedlings are arranged vertically and horizontally. This seedling box C is made of polypropylene or the like. It is a flexible material that is integrally molded with a synthetic resin. For this reason, when the seedling box C is transferred by the seedling box supply means 17, the seedling box C can be transferred while being bent even at the bent portion of the seedling box supply means 17. In addition, the bottom surface of the cell 1 is provided with a trifurcated bottom hole. By this bottom hole, the roots can pass through the seedling and can be extended to the bed, and the water irrigated in the cell 1 at the time of seedling raising. In addition, a seedling push-out pin 24, which will be described later, of the seedling picking means PU can pass through the seedling extraction means PU to push out the seedling and can enter the cell 1.
移植装置９は、具体的には、以下のような構成から成る。
苗箱供給手段１７は、具体的には、機体側面視で走行車体１０の座席１３の後側近傍に配置され、走行車体１０に搭乗した作業者が苗箱Ｃを装填する個所となる苗箱装填部１７ａと、該苗箱装填部１７ａに装填された苗箱Ｃを後下がりに搬送し、続いて屈曲搬送し、更に、図５の苗箱供給手段１７の下半分の側面図に示すように、苗取出し手段ＰＵによる苗取出し位置ｐ１に向けて下方に搬送する苗箱供給搬送部１７ｂと、該苗箱供給搬送部１７ｂにより搬送され苗取出し手段ＰＵにより苗が取出されて空になった苗箱ＣをＵ字状に屈曲搬送し、更に苗箱装填部１７ａの下方位置に向けて上方に搬送する空箱搬送部１７ｃを設けた構成としている。尚、苗箱装填部１７ａは、苗箱供給手段１７において作業者に最も近い前端部に設けられている。
Specifically, the transplant device 9 has the following configuration.
Specifically, the seedling box supply means 17 is arranged in the vicinity of the rear side of the seat 13 of the traveling vehicle body 10 in a side view of the vehicle body, and is a seedling box serving as a place where an operator who has boarded the traveling vehicle body 10 loads the seedling box C. The loading section 17a and the seedling box C loaded in the seedling box loading section 17a are conveyed rearwardly downward, then bent and conveyed, and further as shown in the side view of the lower half of the seedling box supply means 17 in FIG. The seedling box supply / conveyance part 17b that conveys downward toward the seedling extraction position p1 by the seedling extraction means PU, and the seedling extraction means PU that are transported by the seedling box supply / conveyance part 17b are extracted and emptied. The seedling box C is bent and conveyed in a U shape, and an empty box conveyance unit 17c for conveying the seedling box C upward toward the lower position of the seedling box loading unit 17a is provided. The seedling box loading unit 17 a is provided at the front end portion closest to the operator in the seedling box supply means 17.
苗箱装填部１７ａに装填される苗箱Ｃは、その苗箱Ｃの長手方向が前後方向に向く姿勢で、しかも、上面側（セル１の開口部）が上方に向く姿勢で装填される。したがって、装填された苗箱Ｃはその苗箱Ｃの長手方向に搬送されるものとなり、また、装填された苗箱Ｃの各セル１に収容された苗Ｎは、苗箱装填部１７ａでは葉茎部Ｎｂが上方に向って伸びる姿勢となり、苗取出し位置ｐ１では葉茎部Ｎｂが後方に向って伸び且つ床部Ｎａが葉茎部Ｎｂに対して前側に位置する姿勢となるように搬送される。
The seedling box C loaded in the seedling box loading section 17a is loaded in such a posture that the longitudinal direction of the seedling box C is directed in the front-rear direction and the upper surface side (opening portion of the cell 1) is directed upward. Therefore, the loaded seedling box C is transported in the longitudinal direction of the seedling box C, and the seedlings N accommodated in each cell 1 of the loaded seedling box C are leaves in the seedling box loading section 17a. The stem Nb extends upward, and at the seedling extraction position p1, the leaf stem Nb extends rearward and is transported so that the floor Na is positioned forward relative to the leaf Nb. The
また、苗箱供給手段１７には、空箱搬送部１７ｃにより搬送されて、その搬送端部から排出される空の苗箱Ｃを受けて収容する空箱収容部１７ｄ（図１）を苗箱装填部１７ａの下方位置に設けたものとしている。
In addition, the seedling box supply means 17 is provided with an empty box storage portion 17d (FIG. 1) that receives and stores an empty seedling box C that is transported by the empty box transporting portion 17c and discharged from the transport end portion. It is assumed that it is provided below the loading unit 17a.
苗箱供給手段１７は支持フレーム１８に支持され、該支持フレーム１８は、その基部が植付部伝動ケース１９に支持され、該植付部伝動ケース１９には連結部材２１が連結されている。該連結部材２１は走行車体１０に苗植付装置９を昇降自在に支持する単一の上リンク１６ａと一対の下リンク１６ｂからなる３点リンク機構の苗植付装置９側の端部を上下方向に連結する上下部材２２に連結している。
The seedling box supply means 17 is supported by a support frame 18, and the base of the support frame 18 is supported by a planting part transmission case 19, and a connecting member 21 is coupled to the planting part transmission case 19. The connecting member 21 moves up and down the end portion on the seedling planting device 9 side of a three-point link mechanism comprising a single upper link 16a and a pair of lower links 16b that support the seedling planting device 9 so as to be movable up and down on the traveling vehicle body 10. It connects with the up-and-down member 22 connected to a direction.
図５に示すように苗取出し手段ＰＵは、苗をセル１の底部側から押出して取出す構成としている。具体的には、棒状に設けた苗押出し用のピン２４を、苗箱供給手段１７の下側のＵ字状搬送部分の中にあってピン２４の先端部分が後方に向かうように配置し、ピン２４の先端部が後方に向かって突出し又前方に向かって引っ込むよう適宜タイミングで往復動するように設けている。これにより、苗押出しピン２４が、苗取出し位置ｐ１まで供給された苗箱Ｃのセル１の底部側からその底部に設けた底孔内に突入してセル１内の床部Ｎａを後方に押し出して、苗Ｎをセル１から後方に取出すようになっている。
As shown in FIG. 5, the seedling extraction means PU is configured to extrude and extract seedlings from the bottom side of the cell 1. Specifically, the pin 24 for extruding the seedling provided in a rod shape is arranged in the U-shaped conveying portion on the lower side of the seedling box supply means 17 so that the tip portion of the pin 24 faces rearward, The tip of the pin 24 is provided so as to reciprocate at an appropriate timing so that it protrudes backward and retracts forward. As a result, the seedling pushing pin 24 enters the bottom hole provided in the bottom of the cell 1 of the seedling box C supplied up to the seedling picking position p1 and pushes the floor Na in the cell 1 backward. Thus, the seedling N is taken out from the cell 1 backward.
また、この苗取出し手段ＰＵは、苗Ｎを列状に並んだ状態で複数個同時にセル１から取出す構成としている。即ち、苗取出し位置ｐ１に供給されてきた苗箱Ｃの左右横一列（苗箱Ｃの短手方向）のセル１・・・のそれぞれに対応して前記の苗押出し用のピン２４を横並びに複数設けて、苗取出し位置ｐ１の横一列の苗を同時に押し出して取出すように設けている。なお、図５に示すように該苗取出し手段ＰＵにより取出した複数の苗Ｎ・・・は、苗供給ベルト３６と苗下降送りベルト３７を有する苗供給手段ＮＴ１によって順次一つづつ苗植え付けディスク２７を有する苗植付け手段ＰＴに供給する構成とする。また、苗植え付けディスク２７はＰＴＯ軸４３からの駆動力が伝達される伝動軸４２により駆動する植付ディスク駆動スプロケット２６により回動される。
In addition, the seedling extraction means PU is configured to simultaneously extract a plurality of seedlings N from the cell 1 in a row. That is, the seedling extruding pins 24 are arranged side by side corresponding to each of the cells 1... Of the seedling box C supplied to the seedling picking position p1 in the left and right horizontal rows (short direction of the seedling box C). A plurality of seedlings are provided so that the seedlings in a horizontal row at the seedling extraction position p1 are simultaneously pushed out. 5, a plurality of seedlings N... Taken out by the seedling picking means PU are sequentially seeded by the seedling planting disk 27 by the seedling feeding means NT1 having the seedling feeding belt 36 and the seedling lowering feed belt 37. It is set as the structure supplied to the seedling planting means PT which has. The seedling planting disk 27 is rotated by a planting disk drive sprocket 26 driven by a transmission shaft 42 to which a driving force from the PTO shaft 43 is transmitted.
苗植付け手段ＰＴは、左右の植付ディスク２７で苗Ｎを挟んで（具体的には、苗Ｎの葉部を挟んで）畑地の移植圃場の土中に移動し植え付けるよう構成したものである。
苗植付け手段ＰＴの具体的な駆動構成は以下のようになっている。
The seedling planting means PT is configured such that the seedling N is sandwiched between the left and right planting discs 27 (specifically, the leaves of the seedling N are sandwiched) and moved and planted in the soil of the transplanting field in the field. .
The specific drive configuration of the seedling planting means PT is as follows.
まず、エンジン２からの動力が走行車体１０の後部に突出させたＰＴＯ軸４３から自在継手４４を備えた伝動軸４２を介して移植装置９の前記連結部材２１に設けた伝動機構から植付部伝動ケース１９内に入力され、該伝動ケース１９内の伝動機構を介して苗箱供給手段１７の下部の下方近傍に配置された伝動ケース１９内の機体左右方向に長い伝動軸３３に伝動し、該伝動ケース１９から後方に伸びるように設けた複数の苗供給手段ＮＴ１を回動させる構成である。
First, the planting part is connected to the connecting member 21 of the transplanting device 9 through the transmission shaft 42 provided with the universal joint 44 from the PTO shaft 43 in which the power from the engine 2 protrudes to the rear part of the traveling vehicle body 10. Input into the transmission case 19, and transmitted to the transmission shaft 33 that is long in the left-right direction of the machine body in the transmission case 19 disposed near the lower part of the lower part of the seedling box supply means 17 through the transmission mechanism in the transmission case 19, A plurality of seedling supply means NT1 provided so as to extend rearward from the transmission case 19 is rotated.
複数の苗供給手段ＮＴ１から苗植付け手段ＰＴに苗が受け渡されて、植付伝動ケース１９内の伝動機構からの駆動で駆動する植付ディスク駆動スプロケット２６により回転する植付ディスク２７を備えた苗植付け手段ＰＴなどによる苗の植付のための具体的な駆動構成の説明は省略する。
A seedling is delivered from the plurality of seedling supply means NT1 to the seedling planting means PT, and is provided with a planting disk 27 that is rotated by a planting disk drive sprocket 26 that is driven by the drive mechanism in the planting transmission case 19 A description of a specific drive configuration for seedling planting by the seedling planting means PT or the like is omitted.
図６の苗箱供給手段１７の要部背面図に示すように、前記苗供給手段ＮＴ１は、具体的には、左右両端側に駆動回転するように設けた一対の駆動ローラ３４，３４と左右中央側に回転自在に設けた一対の従動ローラ３５，３５と両ローラ３４，３４、３５，３５に巻き掛けた一対の苗供給ベルト３６，３６とを備えた構成としている。これにより、前記苗取出し手段ＰＵにより取出されて左右横一列に列状に並んだ状態の複数個の苗Ｎ・・・を左右に並設された左右の供給ベルト３６，３６の上に載せ、そして、横一列の苗Ｎ・・・の左半分を左側の供給ベルト３６の駆動回転で左方に搬送し、右半分を右側の供給ベルト３６の駆動回転で右方に搬送し、左右の駆動ローラ３４，３４の左右外側方に各々設けた左右一対の苗下降送りベルト３７の上端部側（苗供給部２６ｃ，２６ｃ、但し、図６には左側苗供給部２６ｃのみを図示する。）に、苗Ｎの床部Ｎａを一つづつ供給する。
As shown in the rear view of the essential part of the seedling box supply means 17 in FIG. 6, the seedling supply means NT1 specifically includes a pair of drive rollers 34, 34 provided so as to be driven and rotated on the left and right ends, and left and right A pair of driven rollers 35, 35 provided rotatably at the center side and a pair of seedling supply belts 36, 36 wound around both rollers 34, 34, 35, 35 are provided. Thereby, a plurality of seedlings N ... taken out by the seedling taking-out means PU and arranged in a line in the left and right lateral rows are placed on the left and right supply belts 36, 36, Then, the left half of the horizontal row of seedlings N... Is conveyed to the left by the drive rotation of the left supply belt 36, and the right half is conveyed to the right by the drive rotation of the right supply belt 36 to drive the left and right. On the upper end side of the pair of left and right seedling lowering feed belts 37 provided on the left and right outer sides of the rollers 34, 34 (seedling supply parts 26c, 26c, but only the left seedling supply part 26c is shown in FIG. 6). Then, the floor portion Na of the seedling N is supplied one by one.
そして、図１０に示すように、苗供給ベルト３６から苗下降送りベルト３７への苗受け継ぎにおいて、一旦苗Ｎの床部Ｎａを受け止める苗受け部８４を設けている。この苗受け部８４は、苗下降送りベルト３７の上方に位置し、左右一対の板ばねで構成されている。苗受け部８４で受け止められた苗は、上下に作動する苗押し具８５でその床部Ｎａが下側に押されることにより、前記左右一対の板ばねの間隔を開きながら下方の苗下降送りベルト３７へ供給される。尚、前記苗押し具８５は、伝動ケース１９内からの動力により前側の回動支点で上下回動する前後に延びるアーム部と該アーム部の先端（後端）に設けた苗押し作用部とで構成され、苗供給ベルト３６からの苗受け部８４への供給タイミングに合わせて作動する構成となっている。苗下降送りベルト３７の後側には苗受け部８４で保持される苗の葉茎部Ｎｂを受ける苗姿勢規制具８６を設けており、この苗姿勢規制具８６は、要部を左右に延びる棒材で構成しており、苗受け部８４で保持される苗の姿勢を適正に前後水平姿勢に維持する。そして、苗押し具８５で苗が下方へ押されると、苗の茎部Ｎｂが苗姿勢規制具８６の前側に逃げながら該苗姿勢規制具８６の下方へ押し出され、苗下降送りベルト３７により苗が適正な姿勢で搬送される。また、苗受け部８４で保持される苗の茎部Ｎｂが次に供給される苗供給ベルト３６上の苗の茎部Ｎｂに絡んでいても、苗供給ベルト３６上の苗の茎部Ｎｂは苗姿勢規制具８６の上側に残るので、苗押し具８５で苗を押し出すことにより苗の茎部Ｎｂどうしの絡みを解すことができ、苗下降送りベルト３７ひいては苗植付け手段ＰＴで適正に苗の供給を行える。また、苗姿勢規制具８６により、苗受け部８４で保持される苗の茎部Ｎｂが苗下降送りベルト３７で搬送されている苗の茎部Ｎｂと干渉して苗下降送りベルト３７で搬送されている苗の姿勢を不適正にするようなことを防止できる。尚、苗姿勢規制具８６の前後方向の位置及び左右の傾斜角度を調節できる構成となっており、例えば、苗が大きい（茎部Ｎｂが長い）ときや茎部Ｎｂが硬いときは、苗押し具８５の苗押し作動で苗姿勢規制具８６の下方へ円滑に茎部Ｎｂが移行するように、苗姿勢規制具８６を後側（苗下降送りベルト３７から離れる側）に位置変更したり苗姿勢規制具８６の自由端側が下位となるよう傾斜させることができる。逆に、苗が小さい（茎部Ｎｂが短い）ときや茎部Ｎｂが軟らかいときは、苗姿勢規制具８６で茎部Ｎｂを確実に支持できるように、苗姿勢規制具８６を前側（苗下降送りベルト３７側）に位置変更したり、苗姿勢規制具８６の自由端側が上位となるよう傾斜させることができる。従って、苗の生育状況等に応じて、適正に苗供給できるように苗姿勢規制具８６を調節できる。
As shown in FIG. 10, a seedling receiving portion 84 that temporarily receives the floor portion Na of the seedling N is provided in the seedling transfer from the seedling supply belt 36 to the seedling lowering feed belt 37. The seedling receiving portion 84 is located above the seedling lowering feed belt 37 and is composed of a pair of left and right leaf springs. The seedling received by the seedling receiving portion 84 is pressed downward by a seedling pusher 85 that moves up and down, and the floor portion Na is pressed downward, thereby opening a lower seedling lowering feed belt while opening a space between the pair of left and right leaf springs. 37. The seedling pusher 85 includes an arm portion extending in the front-rear direction by a power from within the transmission case 19 and rotating at the front pivot point, and a seedling pushing action portion provided at the tip (rear end) of the arm portion. And is configured to operate in accordance with the supply timing from the seedling supply belt 36 to the seedling receiving portion 84. A seedling posture restricting tool 86 for receiving the leaf stem Nb of the seedling held by the seedling receiving portion 84 is provided on the rear side of the seedling lowering feed belt 37, and the seedling posture restricting tool 86 extends to the left and right. It is comprised with the bar material, and the attitude | position of the seedling hold | maintained by the seedling receiving part 84 is maintained in the front-back horizontal attitude | position appropriately. When the seedling is pushed downward by the seedling pushing tool 85, the stem Nb of the seedling is pushed out below the seedling posture regulating tool 86 while escaping to the front side of the seedling posture regulating tool 86, and the seedling descending feed belt 37 pushes the seedling. Is transported in an appropriate posture. Moreover, even if the stem Nb of the seedling held by the seedling receiving portion 84 is entangled with the stem Nb of the seedling on the seedling supply belt 36 to be supplied next, the stem Nb of the seedling on the seedling supply belt 36 is Since it remains on the upper side of the seedling posture regulating tool 86, the seedling pusher 85 pushes out the seedling, so that the entanglement between the stems Nb of the seedling can be solved, and the seedling descending feed belt 37 and the seedling planting means PT properly Can supply. Further, the seedling posture regulating tool 86 causes the seedling stem portion Nb held by the seedling receiving portion 84 to interfere with the seedling stem portion Nb conveyed by the seedling lowering feed belt 37 and be conveyed by the seedling lowering feed belt 37. It can prevent improper posture of the seedlings. It should be noted that the front-rear direction position and the left / right inclination angle of the seedling posture regulating tool 86 can be adjusted. For example, when the seedling is large (the stem Nb is long) or the stem Nb is hard, the seedling push The position of the seedling posture restricting tool 86 is changed to the rear side (the side away from the seedling lowering feed belt 37) or the seedling so that the stem Nb smoothly moves below the seedling posture restricting tool 86 by pushing the seedling of the tool 85. It can be made to incline so that the free end side of the attitude | position control tool 86 may become a low order. Conversely, when the seedling is small (the stem portion Nb is short) or the stem portion Nb is soft, the seedling posture regulating tool 86 is placed on the front side (the seedling descending) so that the seedling posture regulating tool 86 can support the stem portion Nb reliably. It is possible to change the position to the feeding belt 37 side or to incline so that the free end side of the seedling posture restricting tool 86 is higher. Therefore, the seedling posture restricting tool 86 can be adjusted so that the seedling can be properly supplied according to the growth condition of the seedling.
このようにして一つづつ供給された苗Ｎを左右の各苗供給部２６ｃ，２６ｃに対応してそれぞれ設けた左右の苗植付け手段ＰＴ，ＰＴの植付ディスク２７，２７が、供給されてきた苗Ｎ，Ｎを挟んで移植圃場の土壌中に移動させて苗を植付けていく。
The right and left seedling planting means PT and PT planting disks 27 and 27 provided with the seedlings N supplied one by one in correspondence with the left and right seedling supply units 26c and 26c have been supplied. The seedlings are planted by moving the seedlings N and N into the soil of the transplanting field.
なお、苗供給ベルト３６の外周面の前端部側には、ベルト回転方向に設定間隔で突起３６ａを設けていて、該突起３６ａの左右間のベルト上面に苗Ｎの床部Ｎａが一つづつ載せられるようになっていて、これにより苗供給ベルト３６の上面に載せた苗を適確に一つづつ苗供給部２６ｃに供給できるものとなっている。
In addition, protrusions 36a are provided at set intervals in the belt rotation direction on the front end side of the outer peripheral surface of the seedling supply belt 36, and one floor portion Na of the seedling N is provided on the belt upper surface between the right and left of the protrusion 36a. Thus, the seedlings placed on the upper surface of the seedling supply belt 36 can be accurately supplied to the seedling supply unit 26c one by one.
ところで、苗取出し手段ＰＵにより取出した苗Ｎが苗供給手段ＮＴ１の苗供給ベルト３６，３６上に直接載るように設ける構成もあるが、この実施例では、苗供給手段ＮＴ１が苗箱供給手段１７の下方に入り込むように配置し、そのように配置した苗供給手段ＮＴ１に苗取出し手段ＰＵにより取出した苗Ｎ・・・を移送する苗移送手段ＮＴ２（図５）を設けて、苗供給手段ＮＴ１が苗箱供給手段１７の後方に突出せず移植装置９の前後長が短くなるように構成している。
Incidentally, there is a configuration in which the seedling N extracted by the seedling extraction means PU is provided directly on the seedling supply belts 36, 36 of the seedling supply means NT1, but in this embodiment, the seedling supply means NT1 is the seedling box supply means 17. The seedling supply means NT1 (FIG. 5) for transferring the seedling N extracted by the seedling extraction means PU is provided to the seedling supply means NT1 arranged so as to enter the seedling supply means NT1. However, it does not protrude rearward of the seedling box supply means 17 and the length of the transplanting device 9 is shortened.
上記苗移送手段ＮＴ２は、苗取出し手段ＰＵの苗押出しピン２４・・・によって押出された横一列の苗Ｎ・・・の各床部Ｎａ・・・が係合する苗係合部５６ａ・・・を備えた苗ホルダ５６を設けていて、この苗ホルダ５６を駆動回動するリンク３８にて前記苗取出し位置ｐ１と苗供給ベルト３６，３６の上方前方側近傍の苗受け渡し位置ｐ４（図５、図６）とを矢印Ｙのように往復移動させるように設けている。これにより、苗押出しピン２４・・・が苗押出し作動により横一列の苗Ｎ・・・が各セル１・・・から押出されると、苗取出し位置ｐ１に位置する苗ホルダ５６の各苗係合部５６ａ・・・に苗Ｎの床部Ｎａ・・・が係合して保持される。
The seedling transfer means NT2 includes seedling engaging portions 56a in which the respective floor portions Na of the row of seedlings N ... pushed out by the seedling pushing pins 24 ... of the seedling taking-out means PU are engaged. The seedling holder 56 is provided, and the seedling removal position p1 and the seedling delivery position p4 in the vicinity of the upper front side of the seedling supply belts 36 and 36 are linked by a link 38 that drives and rotates the seedling holder 56 (FIG. 5). 6) are reciprocated as indicated by an arrow Y. Thus, when the seedling pushing pins 24... Are pushed out from the respective cells 1... By the seedling pushing operation, the seedling holders 56 in the seedling holder 56 located at the seedling picking position p1. The floor portion Na of the seedling N is engaged with and held by the joint portions 56a.
そして、苗ホルダ５６がリンク３８の回動により下方回動して前記苗受け渡し位置ｐ４に移動する。このとき各苗係合部５６ａ内に水平後方に軸心が向く姿勢で固定された第二の苗押出しピン３９・・・の先端部が入り込んで各苗係合部５６ａ・・・内に係合された苗Ｎの床部Ｎａ・・・が後方に押出されて、植付部伝動ケース１９と一体のベルト支持部５８に支持された苗供給ベルト３６，３６上に落とされるようになる。なお、第二の苗押出しピン３９・・・により各苗係合部５６ａ・・・内に係合された苗Ｎの床部Ｎａ・・・が後方に押出されたとき、くし状に設けた苗押し下げ部材４０（図６）が下降して、該部材４０が押出された各苗Ｎの床部Ｎａ・・・を押し下げ、迅速且つ適確に苗が苗供給ベルト３６，３６上に載置されるように設けている。なお、苗押し下げ部材４０は、植付部伝動ケース１９に支持されている。
Then, the seedling holder 56 rotates downward by the rotation of the link 38 and moves to the seedling delivery position p4. At this time, the tips of the second seedling push-out pins 39... Fixed in such a manner that the axis is oriented horizontally rearward in each seedling engaging portion 56 a enter into each seedling engaging portion 56 a. The combined floor portion Na of the seedling N is pushed rearward and dropped onto the seedling supply belts 36 and 36 supported by the belt support portion 58 integral with the planting portion transmission case 19. In addition, when the floor part Na ... of the seedling N engaged in each seedling engaging part 56a ... by the second seedling pushing pin 39 ... was pushed backward, it was provided in a comb shape. The seedling depressing member 40 (FIG. 6) is lowered to depress the floor portion Na of each seedling N from which the member 40 has been extruded, and the seedlings are quickly and accurately placed on the seedling supply belts 36, 36. It is provided to be. The seedling push-down member 40 is supported by the planting part transmission case 19.
図３の苗移植機８の要部側面図に示すように、各苗植付け手段ＰＴによる各苗植付け位置前方の移植圃場の表土面を均平する前鎮圧輪２８が固定部材２０に懸架されている。また固定部材２０に懸架され、後輪１２の踏み跡に案内されて移植装置９を支持する転動輪３０が設けられている。さらに、上記移植装置９は一つの苗箱供給手段１７に、該苗箱供給手段１７に装填された苗箱Ｃから横一列づつ苗Ｎ・・・を取出す苗取出し手段ＰＵと、該苗取出し手段ＰＵにより取出された苗Ｎ・・・を苗供給手段ＮＴ１に受け渡す苗受け渡し手段ＮＴ２と、該苗受け渡し手段ＮＴ２により受け渡された横一列の苗Ｎ・・・を左右に設けた苗植付け手段ＰＴ，ＰＴに供給する苗供給手段ＮＴ１と、そして、該苗供給手段ＮＴ１により供給された苗Ｎを移植圃場に植付けていく左右の苗植付け手段ＰＴ，ＰＴとを備えて一つの苗箱Ｃから２条植えする構成としたものであり、このように構成した移植ユニットを左右に２体設けることで、４条植えに構成でき、また、ｎ体設けることで２×ｎ条植えに構成できるものとなっている。
As shown in the side view of the main part of the seedling transplanting machine 8 in FIG. 3, a front pressure reducing wheel 28 for leveling the surface soil surface of the transplanting field in front of each seedling planting position by each seedling planting means PT is suspended on the fixing member 20. Yes. Further, a rolling wheel 30 is provided that is suspended from the fixing member 20 and is guided by the footsteps of the rear wheel 12 to support the transplanting device 9. Further, the transplanting device 9 includes, in one seedling box supply means 17, a seedling extraction means PU for extracting seedlings N ... one by one from the seedling box C loaded in the seedling box supply means 17, and the seedling extraction means. Seedling transfer means NT2 for transferring the seedlings N ... taken out by the PU to the seedling supply means NT1, and seedling planting means for providing the horizontal seedlings N ... transferred by the seedling transfer means NT2 on the left and right From one seedling box C comprising seedling supply means NT1 for supplying PT, PT, and left and right seedling planting means PT, PT for planting the seedling N supplied by the seedling supply means NT1 in the transplanting field Two-row planting is configured. By providing two transplantation units configured in this way on the left and right, it can be configured as four-row planting, and by providing n bodies, it can be configured as 2 × n-row planting. It has become.
固定部材２０には前記前鎮圧輪２８の後側に土ほぐし体２９が設けられている。該土ほぐし体２９は植付部フレーム２５（図４）に支持され、該土ほぐし体２９は植付ディスク２７に対応した数で横一列に各植付ディスク２７に対応した位置に配置されている。該土ほぐし体２９でほぐされた圃場の土に苗が植付ディスク２７により植え付けられる。植付ディスク２７により植え付けられた各苗Ｎの周囲の土は覆土輪３１で覆われる。なお植付ディスク２７と覆土輪３１は植付部フレーム２５（図４）に上下回動可能に取り付けられた覆土輪・植付ディスク支持フレーム３２に支持される。なお、覆土輪・植付ディスク支持フレーム３２を上下動案内するプレート２３が固定部材２０に取り付けられている。
The fixing member 20 is provided with a soil loosening body 29 on the rear side of the front pressure reducing wheel 28. The soil loosening bodies 29 are supported by the planting part frame 25 (FIG. 4), and the soil loosening bodies 29 are arranged in a row corresponding to the planting disks 27 at positions corresponding to the respective planting disks 27. Yes. A seedling is planted by the planting disk 27 in the soil of the field loosened by the soil loosening body 29. The soil around each seedling N planted by the planting disk 27 is covered with a cover ring 31. The planting disk 27 and the covering ring 31 are supported by a covering ring / planting disk support frame 32 attached to the planting part frame 25 (FIG. 4) so as to be rotatable up and down. A plate 23 that guides the covering ring / planting disk support frame 32 up and down is attached to the fixing member 20.
本実施例の苗移植機８の走行車体１０には圃場にできる後輪１２で形成される凹み部の溝を砕土する砕土装置４１を設けている。砕土装置４１は縦軸の周りを回転する回転体４５で前記溝をほぐし、溝が圃場面と略均等になるようにした、タイヤ跡を消すための装置である。回転体４５は油圧ポンプ４からホース４ａを経由して供給される作動油により駆動する油圧モータ４６で駆動される。前記油圧ポンプ４からの動力に換えてエンジン２の動力を伝達する機械的な手段により回転体４５を駆動させても良いし、独立した単独の駆動源で回転体４５を駆動させても良い。
The traveling vehicle body 10 of the seedling transplanter 8 of the present embodiment is provided with a soil crushing device 41 for crushing a groove in a dent formed by a rear wheel 12 that can be formed in a farm field. The ground breaking device 41 is a device for erasing tire marks by loosening the groove with a rotating body 45 rotating around a vertical axis so that the groove is substantially equal to the field. The rotating body 45 is driven by a hydraulic motor 46 that is driven by hydraulic oil supplied from the hydraulic pump 4 via the hose 4a. The rotating body 45 may be driven by a mechanical means for transmitting the power of the engine 2 instead of the power from the hydraulic pump 4, or the rotating body 45 may be driven by an independent single driving source.
本実施例の８条植の玉ねぎ苗の苗移植機８では後輪１２の走行跡の近傍にも苗を植え付けるので、砕土装置４１の回転する回転体４５によりタイヤの走行跡を耕耘することにより、溝が消されると共に砕土されるので、圃場面が均平化されて苗の植付姿勢や植付深さ等の精度を良好に維持できる。
In the eight-row onion seedling transplanting machine 8 of this embodiment, seedlings are also planted in the vicinity of the running trace of the rear wheel 12, so that the running trace of the tire is cultivated by the rotating body 45 of the ground breaking device 41. Since the grooves are erased and crushed, the field scene is leveled and the accuracy of the planting posture, planting depth, etc. of the seedlings can be maintained well.
従来、タイヤ跡の溝部はカルチ爪等の牽引装置で耕耘していたが、土塊が粗いと溝が消えないことがあったが、本実施例の砕土装置４１は縦軸の周りを回転する回転体４５であるので、水平方向に回転するか又は揺動する縦軸の周りを回転する回転体により圃場面を耕耘することができ、溝が消されると共に砕土される。
Conventionally, the groove portion of the tire mark has been cultivated with a traction device such as a cultivating nail, but the groove may not disappear if the soil mass is rough. However, the soil crushing device 41 of this embodiment rotates around the vertical axis. Since it is the body 45, the field scene can be cultivated by the rotating body that rotates around the vertical axis that rotates or swings in the horizontal direction, and the grooves are erased and crushed.
また、図７（ａ）の砕土装置部分の平面図に示すように、回転体４５の両側部に耕耘した圃場部分に土を寄せる一対の培土板４７，４７を設けている。この一対の培土板４７，４７により、図７（ｂ）の溝部分の圃場の断面図に示すように、回転体４５で耕耘した溝部分に土を寄せることができるので、地表面が沈下するのが防止される。
Further, as shown in the plan view of the soil crushing device portion in FIG. 7A, a pair of soil culturing plates 47, 47 for bringing soil to the field portions cultivated on both sides of the rotating body 45 are provided. As shown in the sectional view of the field of the groove portion of FIG. 7 (b), the pair of soil-growing plates 47 and 47 can bring the soil to the groove portion cultivated by the rotating body 45, so that the ground surface sinks. Is prevented.
もし培土板４７により溝部分に土を寄せないと、溝部分を均平化しても、その部分は地面より低く、また軟らかいため、雨等により土が流され、作物が流されるおそれがある。
なお、本実施例の培土板４７は、前後並びに上下の位置及び角度を変更調整自在に連結部材２１に取り付けている。
If the soil is not brought close to the groove portion by the cultivating plate 47, even if the groove portion is leveled, the portion is lower than the ground and is soft, so the soil may be washed away by rain or the like, and the crop may be washed away.
In addition, the earth-culture board 47 of a present Example is attached to the connection member 21 so that change and adjustment of the front-back and up-and-down position and angle are possible.
なお、一対の培土板４７，４７の左右幅は、機体の左右方向外側のものより機体の左右方向内側のものの方が大きくなるように構成することができる。これにより、直後に苗を植付ける位置となる車輪１１、１２（後輪１２）のトレッド間側に押し避けられた土を砕土装置４１で作られた溝に確実に案内することができ、前鎮圧輪２８により直後に苗を植付ける圃場面の均平化が図れて植付けを適正に行え、ひいては後の管理作業や収穫作業等も良好に行うことができる。このとき、機体の左右方向外側の培土板４７の左右幅は小さいので、不必要に土壌面を荒らすことが抑えられる。また、一対の培土板４７，４７の下端縁は、砕土装置４１で作られた溝に近い位置ほど下位となるように傾斜している。これにより、砕土装置４１で作られた溝に確実に土を移動させることができ、圃場面の均平化が図れる。
The left and right widths of the pair of cultivating plates 47 and 47 can be configured such that the one on the inner side in the left and right direction of the machine body is larger than the one on the outer side in the left and right direction of the machine body. As a result, it is possible to reliably guide the soil that is avoided to be pushed to the side between the treads of the wheels 11 and 12 (rear wheels 12), which are positions for planting seedlings immediately, to the groove made by the soil breaking device 41. The presser wheel 28 can be used to level the field where the seedlings are planted immediately, so that planting can be performed properly, and the subsequent management work and harvesting work can be performed well. At this time, since the left and right widths of the cultivating plate 47 on the outer side in the left and right direction of the machine body are small, it is possible to suppress unnecessary soiling of the soil surface. In addition, the lower edge of the pair of cultivating plates 47, 47 is inclined so that the position closer to the groove made by the soil breaking device 41 is lower. Thereby, soil can be reliably moved to the groove made by the soil crushing device 41, and leveling of the farm scene can be achieved.
また、図４（ａ）の本実施例の８条またぎの移植機８の要部平面図、図４（ｂ）の背面略図に示すように、左右後輪の中間部で一対の後輪１２，１２の中心軸と略一致する位置の後輪ローリングフレーム４８にセンター輪４９を設けている。
Further, as shown in the plan view of the main part of the eight-stripe transplanter 8 of this embodiment in FIG. 4A and the schematic rear view of FIG. 4B, a pair of rear wheels 12 is provided at the middle part of the left and right rear wheels. , 12 is provided with a center wheel 49 in the rear wheel rolling frame 48 at a position substantially coincident with the central axis.
従来、８条またぎで苗を移植すると、全面が均一な平面となり、植付条数幅の半分（４条分の幅）で作業を行う作業機により管理作業等を行う場合、走行車体が傾斜した状態で行うことになり、良好な苗植付け作業ができなかった。しかし、後輪１２の中心軸と略一致する位置にセンター輪４９を設けると上記従来の欠点が解消される。
Conventionally, when seedlings are transplanted with eight straddles, the entire surface becomes a flat surface, and when carrying out management work etc. with a work machine that performs work at half the width of the number of planting strips (width of 4 strips), the traveling vehicle body tilts Therefore, the seedlings could not be planted well. However, if the center wheel 49 is provided at a position substantially coincident with the central axis of the rear wheel 12, the above-mentioned conventional drawbacks are eliminated.
センター輪４９は、後車軸の後輪伝動ケース５０に設けたブラケット５１に移植装置９の昇降に連動して上下位置調節できるようにアーム５４の先端部に支持され、センター輪４９が走行車体１０の重量により、地面を押し付けられるようになっている。また、センター輪４９の揺動中心を後輪１２の中心軸と略一致させると、センター輪４９による溝付け作業が安定する。こうして進路変更した際に、センター輪４９は後輪１２と略同じように移動するので、引きずる等の障害を起こすことがない。
The center wheel 49 is supported at the tip of the arm 54 by a bracket 51 provided on the rear wheel transmission case 50 of the rear axle so that the vertical position can be adjusted in conjunction with the raising and lowering of the transplanting device 9. The ground can be pressed by the weight. Further, when the center of swing of the center wheel 49 is substantially coincident with the center axis of the rear wheel 12, the grooving operation by the center wheel 49 is stabilized. When the course is changed in this way, the center wheel 49 moves in substantially the same manner as the rear wheel 12, so that there is no trouble such as dragging.
前述のようにセンター輪４９は移植装置９の昇降に連動して上下に回動する構成になっているが、移植装置９を昇降させる下リンク１６ｂに支点を設け、センター輪４９を上下させるスプリング５２付きのロッド５３の下端にセンター輪４９を連結し、該ロッド５３の上端を下リング１６ｂに取り付ける（図３）。
As described above, the center ring 49 is configured to rotate up and down in conjunction with the raising and lowering of the transplanting device 9. However, the fulcrum is provided on the lower link 16 b that raises and lowers the transplanting device 9, and the spring that moves the center ring 49 up and down. The center ring 49 is connected to the lower end of the rod 53 with 52, and the upper end of the rod 53 is attached to the lower ring 16b (FIG. 3).
上記構成によると移植装置９を上昇させる場合にセンター輪４９が連動して上昇するので移植装置９のメンテナンスが容易に行える。
また、走行車体１０と移植装置９の前後方向の略中間部で走行車体１０の両側部の取付フレーム５５にフック５５ａを介して空苗箱Ｃの外寸法と略同等またはそれより少し大きめのサイズの空苗箱収納台５７を走行車体１０ひいては機体１２に対して着脱できるように設けた。そのため移植され、空になった苗箱Ｃを収納台５７に落とし込むだけで、空苗箱収納台５７の内部に空苗箱Ｃを整然と重ねることができるので、一枚ずつ重ねて別置した苗枠に運ぶ手間が省け、移植作業に集中することができる。尚、空苗箱収納台５７の側面には空箱Ｃの収納枚数の目安となる目盛８７を設けており、積重ねられた空箱群の上面位置を前記目盛８７と比較して空箱Ｃの枚数を推測することができる構成となっている。これにより、空箱Ｃの枚数が判断し易くなるので、畦からの苗補給時等に機体に新たに搭載するべき苗箱Ｃの枚数が判断し易くなり（空箱Ｃが発生した枚数と同じ枚数で苗が育苗された苗箱Ｃを補給すればよく、苗補給作業性が向上する。なお、前記目盛８７を、空箱収容部１７ｄに設け、空箱収容部１７ｄ内の苗箱Ｃの枚数を判断するようにしてもよい。これにより、苗補給作業性が向上し、ひいては、植付け作業の高能率化が図れる。
According to the above configuration, when the transplantation device 9 is raised, the center ring 49 rises in conjunction with the transplantation device 9, so that the transplantation device 9 can be easily maintained.
In addition, the size approximately equal to or slightly larger than the outer dimension of the empty seedling box C via hooks 55a on the mounting frames 55 on both sides of the traveling vehicle body 10 at a substantially intermediate portion between the traveling vehicle body 10 and the transplanting device 9. The empty seedling box storage stand 57 is provided so as to be detachable from the traveling vehicle body 10 and thus the machine body 12. Therefore, the seedling box C that has been transplanted and emptied can be placed in the empty seedling box storage stand 57 by simply dropping the seedling box C into the storage stand 57, so that the seedlings placed separately one by one can be stacked. This saves you the trouble of carrying it to the frame and allows you to concentrate on the transplanting work. A scale 87 serving as a guide for the number of empty boxes C is provided on the side surface of the empty seed box storage stand 57, and the upper surface position of the stacked empty boxes is compared with the scale 87. The number of sheets can be estimated. This makes it easy to determine the number of empty boxes C, so that it is easy to determine the number of seedling boxes C to be newly mounted on the machine when refilling seedlings from the cocoon (the same as the number of empty boxes C generated). The seedling box C in which the seedlings are nurtured by the number of seedlings may be replenished, so that the seedling replenishment workability is improved.The scale 87 is provided in the empty box housing portion 17d, The number of seedlings may be determined, thereby improving the seedling replenishment workability and, consequently, improving the efficiency of planting work.
ところで、各２条毎の苗箱装填部１７ａの苗箱Ｃを載せる部分には、苗箱Ｃの底部から突出する根を切断するための根切断装置６０を設けている。この根切断装置６０は、線状の樹脂材（例えばナイロン製）からなる切断部材６１を回転板６２の外周部に２本取り付けて設け、前記回転板６２を切断用モータ６３により上下方向の軸心回りに回転させることにより、前記切断部材６１を回転させて根を切断する構成となっている。尚、前記回転板６２も樹脂材（例えばナイロン製）で構成され、前記切断部材６１及び回転板６２は、弾性体で構成されているので、苗箱Ｃの底部に干渉しても該苗箱Ｃを損傷させない構成となっている。また、切断部材６１の太さは直径１．５ｍｍ程度であるので、回転しても慣性モーメントが小さく、切断部材６１が作業者の手や指等に触れても怪我をするようなことを防止している。切断部材６１が回転する位置には、苗箱Ｃの左右両側に当たって該苗箱Ｃを所望の通過位置へ案内する棒状の苗箱案内部６４を左右に設けている。更に、切断部材６１が回転する位置には、苗箱Ｃの底面の左右中央の空間部内に入って該苗箱Ｃの移送を案内する板状の苗箱案内部８８を苗箱装填部１７ａの左右中央に設けている。また、切断部材６１が回転する位置には、根切断装置６０上で苗箱Ｃが移動していることを検出する光電式の苗箱通過センサ６５を設けている。従って、該苗箱通過センサ６５により、根切断装置６０上で苗箱Ｃが移動しているときには、切断用モータ６３を駆動して根切断装置６０（切断部材６１）を作動させ、根切断装置６０上で苗箱Ｃが停止しているとき又は根切断装置６０上に苗箱Ｃがないときは、切断用モータ６３を停止して根切断装置６０（切断部材６１）の作動を停止させる構成となっている。これにより、根切断装置６０を不必要に駆動させずに、根切断装置６０により苗箱Ｃの底部から突出する根を苗箱Ｃ全体にわたって適確に切断することができる。尚、苗箱案内部６４、８８及び苗箱通過センサ６５を含む根切断装置６０全体は、苗箱装填部１７ａに対して取付ボルトで着脱できる構成としており、底部から突出する根がないかあるいは少ない苗箱Ｃを苗箱装填部１７ａに装填するときには、苗箱装填部１７ａから取り外すことができる。尚、根切断装置６０を取り外したときには、前記苗箱案内部６４に代わる苗箱ガイドを苗箱装填部１７ａの左右に装着できる構成となっている。
By the way, a root cutting device 60 for cutting roots protruding from the bottom of the seedling box C is provided at a portion of the seedling box loading section 17a for each two-rows where the seedling box C is placed. This root cutting device 60 is provided with two cutting members 61 made of a linear resin material (for example, made of nylon) attached to the outer peripheral portion of a rotating plate 62, and the rotating plate 62 is vertically moved by a cutting motor 63. By rotating around the center, the cutting member 61 is rotated to cut the root. The rotating plate 62 is also made of a resin material (for example, made of nylon), and the cutting member 61 and the rotating plate 62 are made of an elastic body. Therefore, even if the rotating plate 62 interferes with the bottom of the seedling box C, the seedling box C is not damaged. Moreover, since the thickness of the cutting member 61 is about 1.5 mm in diameter, the moment of inertia is small even if it rotates, and it prevents the cutting member 61 from being injured even if it touches the operator's hand or finger. is doing. At the position where the cutting member 61 rotates, rod-shaped seedling box guide portions 64 are provided on the left and right sides that contact the left and right sides of the seedling box C and guide the seedling box C to a desired passing position. Furthermore, at the position where the cutting member 61 rotates, a plate-shaped seedling box guide part 88 that enters the left and right central space of the bottom surface of the seedling box C and guides the transfer of the seedling box C is provided in the seedling box loading part 17a. It is provided at the left and right center. A photoelectric seedling box passage sensor 65 that detects that the seedling box C is moving on the root cutting device 60 is provided at a position where the cutting member 61 rotates. Accordingly, when the seedling box C is moving on the root cutting device 60 by the seedling box passage sensor 65, the cutting motor 63 is driven to operate the root cutting device 60 (cutting member 61), and the root cutting device. When seedling box C is stopped on 60 or when there is no seedling box C on root cutting device 60, the cutting motor 63 is stopped to stop the operation of root cutting device 60 (cutting member 61). It has become. Thereby, the root protruding from the bottom of the seedling box C can be accurately cut over the entire seedling box C by the root cutting apparatus 60 without driving the root cutting apparatus 60 unnecessarily. The entire root cutting device 60 including the seedling box guides 64 and 88 and the seedling box passage sensor 65 can be attached to and detached from the seedling box loading part 17a with a mounting bolt, and there are no roots protruding from the bottom. When a small seedling box C is loaded in the seedling box loading section 17a, it can be removed from the seedling box loading section 17a. In addition, when the root cutting device 60 is removed, a seedling box guide that replaces the seedling box guide part 64 can be mounted on the left and right of the seedling box loading part 17a.
この苗移植機８は、８条植えの構成で４個の苗箱装填部１７ａが左右に配列されているが、左側２個の苗箱装填部１７ａに設けた根切断装置６０の切断部材６１は上から見て左回転し、右側２個の苗箱装填部１７ａに設けた根切断装置６０の切断部材６１は上から見て右回転する構成となっており、機体の左右中央に対して左右の根切断装置６０で逆回転する構成となっている。すなわち、根切断装置６０の切断部材６１が苗箱装填部１７ａの苗箱移送上手側で機体の左右方向外側に向かって回転するので、切断された根や苗箱Ｃから崩れ落ちた土等が機体の左右外側に飛ばされることになり、機体の左右中央にある座席１３に座る操縦者に前記根及び土がかかりにくく快適な作業が行えると共に、前記根及び土が下方に落下して苗植付け手段ＰＴ，ＰＴで植付けようとする苗に悪影響を与えることが抑えられ、植付の適正化が図れる。尚、切断部材６１で飛ばされる根や土は、苗箱案内部６４の下方の空間を通って機体の左右外方へ飛ばされることになる。
In this seedling transplanting machine 8, four seedling box loading sections 17a are arranged on the left and right in an eight-row planting configuration, but the cutting member 61 of the root cutting device 60 provided in the two left seedling box loading sections 17a. Is rotated left when viewed from above, and the cutting member 61 of the root cutting device 60 provided in the right two seedling box loading portions 17a is configured to rotate right when viewed from above. The left and right root cutting devices 60 rotate backward. That is, since the cutting member 61 of the root cutting device 60 rotates toward the laterally outer side of the machine body on the upper side of the seedling box transfer part 17a of the seedling box loading section 17a, the cut roots, the soil collapsed from the seedling box C, etc. The root and soil are not easily applied to the operator sitting on the seat 13 at the center of the left and right of the aircraft, and the root and soil fall downward and the seedling planting means falls. An adverse effect on PTs and seedlings to be planted with PT is suppressed, and planting can be optimized. In addition, the roots and soil that are blown by the cutting member 61 are blown to the left and right outwards of the aircraft through the space below the seedling box guide portion 64.
根切断装置６０の切断部材６１及び回転板６２の下方は空洞となっており、この空洞に切断した根や苗箱Ｃから崩れ落ちた土等が落下するようにしている。そして、根や土等を前記空洞から斜め下一側方へ案内して排出する排出シューター８９を設けており、この排出シューター８９が根切断装置６０で切断された根を空箱搬送部１７ｃの上方から外れた位置へ案内する根案内手段となる。排出シューター８９の排出口９０は、苗箱装填部１７ａの左右一側で且つ苗箱装填部１７ａにある苗箱Ｃすなわち空箱搬送部１７ｃ及び空箱収納部１７ｄにある苗箱（空箱）Ｃより左右方向外側に位置している。尚、前記排出口９０は、根切断装置６０の切断部材６１の回転方向に合わせて、左側２個の苗箱装填部１７ａのものは苗箱装填部１７ａの左側にあり、右側２個の苗箱装填部１７ａに設けたものは苗箱装填部１７ａの右側にあり、根や土等を機体の左右外方へ円滑に排出できる構成としている。
Below the cutting member 61 and the rotating plate 62 of the root cutting device 60 is a cavity, and the roots that have been cut and the soil that has collapsed from the seedling box C fall into this cavity. A discharge shooter 89 that guides and discharges roots, soil, and the like from the cavity to one side obliquely downward is provided, and the roots cut by the root cutting device 60 by the discharge shooter 89 are removed from the empty box transport unit 17c. Root guide means for guiding to a position deviated from above. The discharge port 90 of the discharge shooter 89 is on the left and right sides of the seedling box loading section 17a and in the seedling box loading section 17a, that is, the seedling box (empty box) in the empty box transport section 17c and the empty box storage section 17d. It is located on the outer side in the left-right direction from C. In addition, according to the rotation direction of the cutting member 61 of the root cutting device 60, the discharge port 90 has two seedling box loading portions 17a on the left side of the seedling box loading portion 17a and two right seedlings. What is provided in the box loading unit 17a is on the right side of the seedling box loading unit 17a, and is configured so that roots, soil, and the like can be smoothly discharged to the left and right outside of the machine body.
以上により、この苗移植機８は、育苗された苗を収容する苗箱Ｃを装填する苗箱装填部１７ａと、該苗箱装填部１７ａに装填された苗箱Ｃを苗取出し位置ｐ１に向けて下側へ搬送する苗箱供給搬送部１７ｂと、前記苗取出し位置ｐ１にある苗箱Ｃから苗を取出す苗取出し手段ＰＵと、前記苗取出し手段ＰＵにより苗が取出されて空になった苗箱ＣをＵ字状の搬送経路により前記苗箱装填部１７ａの下方位置に向けて上側へ転じて搬送する空箱搬送部１７ｃと、該空箱搬送部１７ｃの搬送終端となる苗箱装填部１７ａの下方位置で空箱搬送部１７ｃにより搬送されてきた空の苗箱Ｃを受けて収容する空箱収容部１７ｄとを備え、苗箱Ｃの底面から突出する根を切断する根切断装置６０を苗箱装填部１７ａに設け、該根切断装置６０で切断された根を空箱搬送部１７ｃ及び空箱収容部１７ｄの上方から外れた位置へ案内する根案内手段８９を設けている。
As described above, the seedling transplanting machine 8 directs the seedling box loading unit 17a for loading the seedling box C for storing the seedlings that have been raised and the seedling box C loaded in the seedling box loading unit 17a toward the seedling extraction position p1. The seedling box supply transport unit 17b that transports the seedling to the lower side, the seedling extraction means PU that extracts the seedling from the seedling box C at the seedling extraction position p1, and the seedling that has been emptied by the seedling extraction means PU. An empty box transport section 17c that transports the box C by turning upward toward a lower position of the seedling box loading section 17a through a U-shaped transport path, and a seedling box loading section that serves as a transport end of the empty box transport section 17c A root cutting device 60 that includes an empty box accommodating portion 17d that receives and accommodates the empty seedling box C that has been conveyed by the empty box conveying portion 17c at a position below 17a, and that cuts the root protruding from the bottom surface of the seedling box C. Was provided in the seedling box loading section 17a and cut by the root cutting device 60. The have a root guide means 89 for guiding the position off provided from above the empty boxes conveying portion 17c and the air box housing portion 17d.
従って、この苗移植機８は、苗箱装填部１７ａに苗箱Ｃを装填すると、苗箱装填部１７ａに設けた根切断装置６０により苗箱Ｃの底面から突出する根を切断する。そして、底面から突出する根が切断された苗箱Ｃは苗箱供給搬送部１７ｂにより苗取出し位置ｐ１に円滑に搬送され、苗取出し位置ｐ１に搬送された苗箱Ｃから苗取出し手段ＰＵにより苗が円滑に取出される。前記苗取出し手段ＰＵにより苗が取出されて空になった苗箱（空箱）Ｃは、空箱搬送部１７ｃにより前記苗箱装填部１７ａの下方位置に向けて上側へ搬送され、該空箱搬送部１７ｃの搬送終端で空箱収容部１７ｄにより搬送されてきた空の苗箱Ｃを受けて複数枚収容する。根切断装置６０で切断された根は排出シューター（根案内手段）８９により空箱搬送部１７ｃ及び空箱収容部１７ｄの上方から外れた位置へ案内され、切断された根が、下方の空箱搬送部１７ｃ及び空箱収容部１７ｄへ落下しないようにして、空箱搬送部１７ｃでの空箱搬送及び空箱収容部１７ｄでの空箱収納の邪魔にならないようにできる。
Accordingly, when the seedling transplanter 8 loads the seedling box C in the seedling box loading section 17a, the seedling transplanter 8 cuts the root protruding from the bottom surface of the seedling box C by the root cutting device 60 provided in the seedling box loading section 17a. Then, the seedling box C from which the roots protruding from the bottom surface are cut is smoothly transported to the seedling extraction position p1 by the seedling box supply / conveyance unit 17b, and the seedling extraction means PU transfers the seedling from the seedling box C transferred to the seedling extraction position p1. Is taken out smoothly. The seedling box (empty box) C that has been emptied by taking out the seedling by the seedling taking-out means PU is transported upward by the empty box transporting part 17c toward the lower position of the seedling box loading part 17a. A plurality of sheets are received by receiving the empty seedling box C transported by the empty box housing unit 17d at the transport end of the transport unit 17c. The root cut by the root cutting device 60 is guided by the discharge shooter (root guide means) 89 to a position away from the upper side of the empty box transport unit 17c and the empty box storage unit 17d, and the cut root becomes the lower empty box. It can be prevented from falling into the transfer unit 17c and the empty box storage unit 17d so as not to interfere with empty box transfer in the empty box transfer unit 17c and empty box storage in the empty box storage unit 17d.
よって、苗箱Ｃから苗を円滑に取出すことができるので、苗移送手段ＮＴ２及び苗供給手段ＮＴ１により苗植付け手段ＰＴ，ＰＴへの苗供給を適正に行うことができ、ひいては適正に苗を植付けることができる。また、切断された根が空箱搬送部１７ｃでの空箱搬送や空箱収容部１７ｄでの空箱収納の邪魔にならないようにできるので、この空箱搬送や空箱収納を適正に行えて植付け作業の作業性や作業能率の低下を防止できる。
Therefore, since the seedling can be smoothly taken out from the seedling box C, the seedling transfer means NT2 and the seedling supply means NT1 can appropriately supply the seedlings to the seedling planting means PT and PT, and thus properly plant the seedlings. Can be attached. In addition, since the cut roots do not interfere with empty box transport in the empty box transport unit 17c and empty box storage in the empty box storage unit 17d, this empty box transport and empty box storage can be performed properly. Decrease in workability and efficiency of planting work can be prevented.
また、走行車体１０に搭乗する作業者が苗箱Ｃを供給する苗箱装填部１７ａに根切断装置６０を設けているので、前記作業者が根切断装置６０による根切りの状態を視認することができる。
In addition, since the operator who rides on the traveling vehicle body 10 is provided with the root cutting device 60 in the seedling box loading portion 17a for supplying the seedling box C, the worker visually recognizes the state of root cutting by the root cutting device 60. Can do.
また、排出シューター８９の排出口９０は機体の左右外側方に向けて設けているので、該排出口９０に根や土等が詰まった場合、該排出口９０を機体の左右外側方から容易に清掃できる。
Also, since the discharge port 90 of the discharge shooter 89 is provided toward the left and right outer sides of the machine body, when the discharge port 90 is clogged with roots, soil, etc., the discharge port 90 can be easily opened from the left and right outer sides of the machine body. Can be cleaned.
