JP4957427B2

JP4957427B2 - Seedling transplanter

Info

Publication number: JP4957427B2
Application number: JP2007188081A
Authority: JP
Inventors: 享福井; 建之大内; 信山口
Original assignee: Iseki and Co Ltd
Current assignee: Iseki and Co Ltd
Priority date: 2007-07-19
Filing date: 2007-07-19
Publication date: 2012-06-20
Anticipated expiration: 2027-07-19
Also published as: KR20090009151A; JP2009022201A; KR100988059B1; CN101347068A; CN101347068B

Description

本発明は、苗の植え付け株間隔を変更可能な苗移植機に関する。 The present invention relates to a seedling transplanter capable of changing the seedling planting interval.

フロート付きの苗植付装置を備えた苗移植機（田植機ということがある）において、苗移植機が前進する間に、苗植付装置の苗植付具が中心軸を回動中心として走行速度に対して定速で回転し、苗を所定の間隔で圃場に植え付けていく。 In a seedling transplanter equipped with a seedling planting device with a float (sometimes referred to as a rice transplanter), the seedling planting tool of the seedling planting device runs around the central axis while the seedling transplanting machine advances. It rotates at a constant speed with respect to the speed, and seedlings are planted in the field at predetermined intervals.

苗の疎植用に偏心ギア等による不等速伝動機構を備えた苗植付装置を用いて、該不等速伝動機構を経由して苗植付具を作動させて、広い間隔で苗を植え付ける場合に、苗植付具の作動の動軌跡を適正にして、苗の植付を適正に行うようにした苗移植機があるが、苗植付装置の作動速度が高速になると、苗植付装置の伝動に脈動現象が生じることがあった。 Using a seedling planting device equipped with an inconstant speed transmission mechanism such as an eccentric gear for sparse planting of seedlings, a seedling planting tool is operated via the inconstant speed transmission mechanism, so that seedlings are spread over a wide interval. When planting, there is a seedling transplanter that optimizes the movement trajectory of the seedling planting device to properly plant seedlings. However, if the seedling planting device operates at a high speed, A pulsation phenomenon sometimes occurred in the transmission of the attaching device.

これを防ぐために前後進変速装置と不等速伝動機構の間に逆転防止のための一方向クラッチを設けることで前記苗植付装置の伝動にしゃくり現象が生じることを防止する機構を備えた苗移植機が開発されている。
特開２００５−１４３３４０号公報 In order to prevent this, the seedling provided with a mechanism for preventing the occurrence of a sneezing phenomenon in the transmission of the seedling planting device by providing a one-way clutch for preventing reverse rotation between the forward / reverse transmission and the inconstant speed transmission mechanism. A transplanter has been developed.
JP 2005-143340 A

上記特許文献１に開示された苗植付装置を備えた苗移植機では、苗植付装置に不等速伝動機構が装着されているので、比較的広い間隔で苗を植え付ける場合に、変速レバーの操作等により走行速度を高速側に変速すると苗植付装置の作動速度が高速になって、苗植付具に脈動が発生しやすかった。
そこで、本発明の課題は、不等速伝動機構による苗植付具の脈動を防止し、適正に苗を植付できる苗移植機を提供することである。 In the seedling transplanting machine provided with the seedling planting device disclosed in Patent Document 1, since the inconstant speed transmission mechanism is mounted on the seedling planting device, when the seedlings are planted at relatively wide intervals, the shift lever When the traveling speed was changed to the high speed side by the above operation or the like, the operation speed of the seedling planting device was increased, and pulsation was likely to occur in the seedling planting tool.
Then, the subject of this invention is preventing the pulsation of the seedling planting tool by an inconstant speed transmission mechanism, and providing the seedling transplanting machine which can plant a seedling appropriately.

本発明の上記課題は、次の解決手段で解決される。
請求項１記載の発明は、座席（３１）を備える走行車体（２）と、該走行車体（２）に搭載したエンジン（２０）を設け、該エンジン（２０）からの動力を変速装置（２３）を介してミッションケース（１２）内へ伝達し、ミッションケース（１２）内で走行動力と外部取出動力に分離する構成とし、変速装置（２３）を操作して走行速度を調整する変速手段（１２４）を設け、走行車体（２）の後側に昇降リンク装置（３）を介して苗植付部（４）を装着し、苗植付部（４）には、フレームを兼ねる伝動ケース（５０）と、マット苗を載せて左右往復動し苗を一株分づつ各条の苗取出口（５１ａ）に供給するとともに横一列分の苗を全て苗取出口（５１ａ）に供給すると苗送りベルト（５１ｂ）により苗を下方に移送する苗載台（５１）と、苗取出口（５１ａ）に供給された苗を圃場に植付ける苗植付具（５２ａ）を備える苗植付装置（５２）を備え、ミッションケース（１２）内で分離された外部取出動力を、走行車体（２）の後部に設けた植付クラッチケース（２５）に伝達し、植付クラッチケース（２５）から植付伝動軸（２６）を介して苗植付部（４）へ伝動する構成とした苗移植機において、走行速度に対する苗植付具（５２ａ）の作動速度を変更可能であって、苗植付具（５２ａ）の作動速度を、苗植付のタイミングで速くなるように不等速伝動する不等速伝動機構（１００，１１２）を有する株間変速装置（Ａ）と、該株間変速装置（Ａ）による苗植付具（５２ａ）の作動速度を変更して苗の植え付け間隔を変更する株間変更手段（１２３）を設け、該株間変更手段（１２３）により株間を広い側に設定したときに、株間変速装置（Ａ）は前記不等速伝動機構（１００，１１２）を経由して苗植付具（５２ａ）を作動させることができる構成とし、株間変更手段（１２３）により株間を広い側に設定すると、変速手段（１２４）の高速側への変速を規制する規制手段（１２３ｂ）を設け、変速装置（２３）とは別に、路上走行用の移動速に変速できる副変速装置を設け、副変速装置による移動速への変速に連動して規制手段（１２３ｂ）の規制を解除する規制解除手段を設けた苗移植機である。
請求項２記載の発明は、植付クラッチケース（２５）内に株間変速装置（Ａ）を設け、株間変速装置（Ａ）は、植付伝動軸（２６）への伝動比を切り替える株間変速シフタ（１１５）と、不等速伝動機構（１００，１１２）を経由して植付伝動軸（２６）へ伝動する状態と不等速伝動機構（１００，１１２）を経由せずに植付伝動軸（２６）へ伝動する状態に切り替える不等速切替操作具（１１９）を設け、変速手段（１２４）を、揺動軸（１２４ａ）を支点に揺動する変速レバーとし、株間変更手段（１２３）を、回動中心（１２３ｄ）を支点に回動する株間レバーとし、変速手段（１２４）及び株間変更手段（１２３）を座席（３１）の右側に配置し、規制手段（１２３ｂ）を株間変更手段（１２３）と一体の車速規制アームとし、株間変更手段（１２３）の操作に伴って株間変速シフタ（１１５）を切り替える構成とし、株間変更手段（１２３）を疎植側に切り替えたとき、規制手段（１２３ｂ）が変速手段（１２４）に当接して変速手段（１２４）の高速側への揺動を規制する構成とし、規制手段（１２３ｂ）は、回動支点となる回動軸（１２３ｅ）を有し、規制解除手段は、副変速装置による移動速への変速に連動して規制手段（１２３ｂ）が回動軸（１２３ｅ）を中心に回動することで変速手段（１２４）の移動領域（Ｍ）から規制手段（１２３ｂ）を外す構成である請求項１に記載の苗移植機である。
請求項３記載の発明は、苗送りカウンタ軸（６２）にカウンタアーム（６２ａ）を固定し、ベルト送り軸（６０）にワンウェイクラッチ及び送り軸片（６０ａ）を固定し、カウンタアーム（６２ａ）と送り軸片（６０ａ）を苗送りアーム（６０ｂ）で連結し、苗送りカウンタ軸（６２）の駆動によりベルト送り軸（６０）を介して苗送りベルト（５１ｂ）を作動する構成とし、苗送りアーム（６０ｂ）に当接してカウンタアーム（６２ａ）の死点越えを防止する死点越え防止ストッパ（６３）を設け、該死点越え防止ストッパ（６３）は、苗送りベルト（５１ｂ）が作動したときに死点越えを防止する構成である請求項１又は請求項２に記載の苗移植機である。
請求項４記載の発明は、伝動ケース（５０）内には苗植付具（５２ａ）へ伝動するチェーン（４７）を設け、チェーン（４７）を張る板バネ（４８）を設け、伝動ケース（５０）の外部から内部に向けてチェーン（４７）に直交する方向に挿脱可能なボルト（４９）の先端部を板バネ（４８）に当接させ、ボルト（４９）によりチェーン（４７）の張り具合を調整する構成とし、機体前部に燃料タンク（２８）を設け、機体前面に燃料タンクガード（２ａ）と乗降用補助ステップ（２ｂ）を兼ねた部材を設けた請求項１から請求項３のいずれか１項に記載の苗移植機である。 The above-mentioned problem of the present invention is solved by the following means.
According to the first aspect of the present invention, a traveling vehicle body (2) having a seat (31) and an engine (20) mounted on the traveling vehicle body (2) are provided, and power from the engine (20) is transmitted to a transmission (23). ) Through the transmission case (12) and separated into the traveling power and the external extraction power in the transmission case (12), and the transmission (23) is operated to adjust the traveling speed ( 124), a seedling planting part (4) is mounted on the rear side of the traveling vehicle body (2) via the lifting link device (3), and the seedling planting part (4) has a transmission case that also serves as a frame ( 50) and reciprocating left and right with the mat seedlings, feeding seedlings one by one to the seedling outlet (51a) of each row and feeding all the seedlings for one horizontal line to the seedling outlet (51a) A seedling mount (51) for transferring the seedling downward by means of a belt (51b); A seedling planting device (52) including a seedling planting tool (52a) for planting seedlings supplied to the seedling outlet (51a) in the field is provided, and the external extraction power separated in the mission case (12) is Transmission to the planting clutch case (25) provided at the rear of the traveling vehicle body (2), and transmission from the planting clutch case (25) to the seedling planting unit (4) via the planting transmission shaft (26) In the seedling transplanting machine, the operating speed of the seedling planting tool (52a) relative to the traveling speed can be changed, and the operating speed of the seedling planting tool (52a) is not increased so as to increase at the timing of seedling planting. An inter-strain transmission (A) having an inconstant speed transmission mechanism (100, 112) that transmits at a constant speed, and an operation speed of the seedling planting tool (52a) by the inter-strain transmission (A) to change the seedling planting interval Between stock change means (123) to change the stock, The structure which can operate the seedling planting tool (52a) via the said inconstant speed transmission mechanism (100,112), when a stock space is set to the wide side by (123). When the stock change means (123) sets the stock space to the wide side, the speed change means (124) is provided with a restriction means (123b) for restricting the shift to the high speed side, and travels on the road separately from the transmission (23). This is a seedling transplanter provided with a subtransmission device capable of shifting to a moving speed for use, and provided with a restriction release means for releasing the restriction of the restriction means (123b) in conjunction with the shift to the movement speed by the subtransmission device .
The invention according to claim 2 is provided with an inter-strain transmission (A) in the planting clutch case (25), and the inter-strain transmission (A) switches the transmission ratio to the planting transmission shaft (26). (115), the state of transmission to the planting transmission shaft (26) via the inconstant speed transmission mechanism (100, 112) and the planting transmission shaft without passing through the inconstant speed transmission mechanism (100, 112) An inconstant speed switching operation tool (119) for switching to a state of transmission to (26) is provided, and the speed change means (124) is a speed change lever that swings about the swing shaft (124a) as a fulcrum. Is the inter-stock lever that pivots about the pivot center (123d), the shifting means (124) and the inter-stock changing means (123) are arranged on the right side of the seat (31), and the regulating means (123b) is the inter-stock changing means. (123) and the vehicle speed control arm The inter-strain shift shifter (115) is switched in accordance with the operation of the further means (123), and when the inter-strain change means (123) is switched to the sparse planting side, the regulating means (123b) comes into contact with the speed change means (124). The shifting means (124) is configured to restrict the swing of the speed change means (124) to the high speed side , the restricting means (123b) has a turning shaft (123e) serving as a turning fulcrum, and the restriction releasing means is based on the auxiliary transmission. The restriction means (123b) is removed from the movement region (M) of the speed change means (124) by turning the restriction means (123b) about the turning shaft (123e) in conjunction with the shift to the moving speed. a seedling transplantation machine according to a claim 1.
According to the third aspect of the present invention , the counter arm (62a) is fixed to the seedling feed counter shaft (62), the one-way clutch and the feed shaft piece (60a) are fixed to the belt feed shaft (60), and the counter arm (62a) And the feed shaft piece (60a) are connected by the seedling feed arm (60b), and the seedling feed belt (51b) is operated via the belt feed shaft (60) by driving the seedling feed counter shaft (62). A dead point crossing prevention stopper (63) is provided to contact the feed arm (60b) to prevent the counter arm (62a) from exceeding the dead point. The dead point exceeded prevention stopper (63) operates the seedling feed belt (51b). The seedling transplanting machine according to claim 1 or 2 , wherein the seedling transplanting machine is configured to prevent the dead point from being exceeded .
According to the fourth aspect of the present invention, the transmission case (50) is provided with a chain (47) for transmission to the seedling planting tool (52a), a leaf spring (48) for tensioning the chain (47) is provided, and the transmission case ( 50) the tip of the bolt (49) that can be inserted and removed in the direction perpendicular to the chain (47) from the outside to the inside is brought into contact with the leaf spring (48), and the bolt (49) a structure for adjusting the tension, the fuel tank (28) provided on the body front, claim from claim 1 in which a member which also serves as the boarding for the auxiliary steps and the fuel tank guard (2a) (2b) on the body front face 4. The seedling transplanter according to any one of 3 above.

なお、本明細書では苗移植機の前進方向を前側、後退方向を後側といい、前進方向に向いて左右方向をそれぞれ左側、右側ということにする。 In the present specification, the forward direction of the seedling transplanter is referred to as the front side, the backward direction is referred to as the rear side, and the left-right direction toward the forward direction is referred to as the left side and the right side, respectively.

一般に、苗の植付間隔（株間）を比較的広く設定するとき、苗植付具の作動の動軌跡を適正にするために、苗移植機の走行速度に対する苗植付具（５２ａ）の作動速度は苗植付のタイミングで速くなるように不等速伝動して苗植付具（５２ａ）を作動させて苗を植付るが、苗植付具（５２ａ）による苗の植付が脈動し易くなる。 In general, when the seedling planting interval (between plants) is set relatively wide, the operation of the seedling planting tool (52a) with respect to the traveling speed of the seedling transplanter in order to make the movement locus of the operation of the seedling planting tool appropriate. The seedling planting tool (52a) is operated so as to increase the speed at the seedling planting timing and the seedling planting tool (52a) is operated to plant the seedling. It becomes easy to do.

なお、不等速伝動により苗植付装置の作動が速くなったり遅くなったりするので、苗植付装置の伝動に脈動が起こる。また、苗移植機の高速前進時は、苗植付装置の作動速度が増幅されるので、苗植付装置の作動速度の高低差が大きくなって、脈動が大きくなる。 In addition, since the operation of the seedling planting device becomes faster or slower due to unequal speed transmission, pulsation occurs in the transmission of the seedling planting device. In addition, when the seedling transplanter advances at a high speed, the operating speed of the seedling planting apparatus is amplified, so that the difference in the operating speed of the seedling planting apparatus increases and pulsation increases.

しかし、請求項１記載の発明によれば、株間を比較的広く設定したとき（疎植のとき）に変速手段（１２４）の高速側への変速を規制する規制手段（１２３ｂ）で高速走行ができなくするので脈動を抑え、植付精度が向上する。また、路上走行用の移動速に変速すると、車速規制を解除することができる。
また、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、株間レバーを疎植側に切り替えたとき、株間レバーと一体の車速規制アームが変速レバーに当接して変速レバーの高速側への揺動を規制する構成とすることができる。
また、請求項３記載の発明によれば、請求項１又は請求項２に記載の発明の効果に加えて、死点越え防止ストッパ（６３）により、苗送りカウンタ軸（６２）の回動が死点を越えない範囲に規制されるため、カウンタアーム（６２ａ）の死点越えを防ぎながらリンク機構の作動によるベルト送り軸（６０）の回動量を大きくすることができ、小スペースに構成される小型のリンク機構でありながら大きい苗送り量を得ることができる。更に、苗送り作動したときに死点越えを防止できる。
また、請求項４記載の発明によれば、請求項１から請求項３のいずれか１項に記載の発明の効果に加えて、ボルト（４９）によりチェーン（４７）の張り具合を調整できるので、チェーン（４７）に適正な張力を与えることができ、苗植付具（５２ａ）の脈動を防止できる。また、燃料タンクガード（２ａ）と乗降用補助ステップ（２ｂ）を兼ねた部材を設けたので、コストダウン効果が得られるとともに、燃料タンク（２８）の燃料供給口（２８ａ）を防護できる。 However, according to the first aspect of the present invention, when the interval between the stocks is set relatively wide (in the case of sparse planting), the high-speed traveling can be performed by the restriction means (123b) for restricting the speed change means (124) to the high speed side. Since it can not be done, pulsation is suppressed and planting accuracy is improved. Further, the vehicle speed regulation can be released when the speed is changed to the traveling speed for traveling on the road.
Further, according to the invention described in claim 2, in addition to the effect of the invention described in claim 1, when the inter stock lever is switched to the sparse planting side, the vehicle speed regulating arm integrated with the inter stock lever is brought into contact with the speed change lever. It can be set as the structure which controls the rocking | fluctuation to the high speed side of a speed-change lever.
Further, according to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2 , the seedling feed counter shaft (62) is rotated by the dead point excess prevention stopper (63). Since it is restricted within the range not exceeding the dead point, the rotation amount of the belt feed shaft (60) by the operation of the link mechanism can be increased while preventing the counter arm (62a) from exceeding the dead point, and the space is configured in a small space. It is possible to obtain a large seedling feed amount while being a small link mechanism. Furthermore, it is possible to prevent the dead point from being exceeded when the seedling feeding operation is performed.
According to the invention of claim 4, in addition to the effect of the invention of any one of claims 1 to 3, the tension of the chain (47) can be adjusted by the bolt (49). Appropriate tension can be applied to the chain (47), and pulsation of the seedling planting tool (52a) can be prevented. Moreover, since the member which served as the fuel tank guard (2a) and the auxiliary boarding step (2b) is provided, the cost reduction effect can be obtained and the fuel supply port (28a) of the fuel tank (28) can be protected .

以下、図面に基づき、本発明の好ましい実施の形態について説明する。
図１及び図２は本発明の一実施例である乗用型田植機の側面図と平面図である。乗用型田植機１は、走行車体２の後側に昇降リンク装置３を介して苗植付部４が昇降可能に装着され、走行車体２の後部上側に作業者を機体から落とさないようにするためのガード５が設けられている。 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG.1 and FIG.2 is the side view and top view of the riding type rice transplanter which are one Example of this invention. The riding type rice transplanter 1 has a seedling planting portion 4 mounted on the rear side of the traveling vehicle body 2 via an elevating link device 3 so as to be movable up and down so that an operator is not dropped from the aircraft body on the upper rear portion of the traveling vehicle body 2. A guard 5 is provided.

走行車体２は、駆動輪である左右一対の前輪１０，１０及び左右一対の後輪１１，１１を備えた四輪駆動車両であって、機体の前部にミッションケース１２が配置され、そのミッションケース１２の左右側方に前輪ファイナルケース１３，１３が設けられ、該左右前輪ファイナルケース１３，１３の操向方向を変更可能な各々の前輪支持部から外向きに突出する左右前輪車軸に左右前輪１０，１０が各々取り付けられている。また、ミッションケース１２の背面部にメインフレーム１５の前端部が固着されており、そのメインフレーム１５の後端左右中央部に前後水平に設けた後輪ローリング軸を支点にして後輪ギヤケース１８，１８がローリング自在に支持され、その後輪ギヤケース１８，１８から外向きに突出する後輪車軸に後輪１１，１１が取り付けられている。 The traveling vehicle body 2 is a four-wheel drive vehicle including a pair of left and right front wheels 10 and 10 and a pair of left and right rear wheels 11 and 11 as drive wheels, and a transmission case 12 is disposed at the front of the fuselage. Front wheel final cases 13, 13 are provided on the left and right sides of the case 12, and the left and right front wheels are mounted on the left and right front wheel axles projecting outward from the respective front wheel support portions capable of changing the steering direction of the left and right front wheel final cases 13, 13. 10 and 10 are respectively attached. Further, the front end portion of the main frame 15 is fixed to the rear portion of the transmission case 12, and a rear wheel gear case 18, with a rear wheel rolling shaft provided horizontally in the front and rear sides at the rear left and right center of the main frame 15 as a fulcrum. The rear wheels 11 and 11 are attached to a rear wheel axle that is supported in a freely rolling manner and projects outwardly from the rear wheel gear cases 18 and 18.

エンジン２０はメインフレーム１５の上に搭載されており、該エンジン２０の回転動力が、ベルト伝動装置２１及びＨＳＴ２３を介してミッションケース１２に伝達される。ミッションケース１２に伝達された回転動力は、該ケース１２内の図示しない走行動力変速装置により変速された後、走行動力と外部取出動力に分離して取り出される。そして、走行動力は、一部が前輪ファイナルケース１３，１３に伝達されて前輪１０，１０を駆動すると共に、残りが後輪ギヤケース１８，１８に伝達されて後輪１１，１１を駆動する。また、外部取出動力は、走行車体２の後部に設けた植付クラッチケース２５に伝達され、それから植付伝動軸２６によって苗植付部４へ伝動される。 The engine 20 is mounted on the main frame 15, and the rotational power of the engine 20 is transmitted to the transmission case 12 via the belt transmission device 21 and the HST 23. The rotational power transmitted to the mission case 12 is shifted by a traveling power transmission (not shown) in the case 12 and then separated into traveling power and externally extracted power. A part of the traveling power is transmitted to the front wheel final cases 13 and 13 to drive the front wheels 10 and 10, and the rest is transmitted to the rear wheel gear cases 18 and 18 to drive the rear wheels 11 and 11. Further, the external take-out power is transmitted to a planting clutch case 25 provided at the rear part of the traveling vehicle body 2, and then transmitted to the seedling planting unit 4 by a planting transmission shaft 26.

エンジン２０の上部はエンジンカバー３０で覆われており、その上に座席３１が設置されている。座席３１の前方には各種操作機構を内蔵するフロントカバー３２があり、その上方に前輪１０，１０を操向操作するハンドル３４が設けられている。エンジンカバー３０及びフロントカバー３２の下端左右両側は水平状のフロアステップ３５になっている。フロアステップ３５は一部格子状になっており（図２参照）、該ステップ３５を歩く作業者の靴についた泥が圃場に落下するようになっている。フロアステップ３５上の後部は、後輪フェンダを兼ねるリヤステップ３６となっている。 The upper part of the engine 20 is covered with an engine cover 30, and a seat 31 is installed thereon. A front cover 32 incorporating various operation mechanisms is provided in front of the seat 31, and a handle 34 for steering the front wheels 10 and 10 is provided above the front cover 32. The engine cover 30 and the front cover 32 have horizontal floor steps 35 on the left and right sides of the lower end. The floor step 35 is partly grid-shaped (see FIG. 2), and mud on the shoe of the worker walking through the step 35 falls on the field. The rear part on the floor step 35 is a rear step 36 that also serves as a rear wheel fender.

また、走行車体２の前部左右両側には、補給用の苗を載せておく予備苗載台３８，３８が機体よりも側方に張り出す位置と内側に収納した位置とに回動可能に設けられている。 Further, on both the left and right sides of the front part of the traveling vehicle body 2, the spare seedling platforms 38, 38 on which the replenishment seedlings are placed can be pivoted to a position projecting laterally from the machine body and a position housed inside. Is provided.

昇降リンク装置３は平行リンク構成であって、１本の上リンク４０と左右一対の下リンク４１，４１を備えている。これらリンク４０，４１，４１は、その基部側がメインフレーム１５の後端部に立設した背面視門形のリンクベースフレーム４２に回動自在に取り付けられ、その先端側に縦リンク４３が連結されている。そして、縦リンク４３の下端部に苗植付部４に回転自在に支承された連結軸４４が挿入連結され、連結軸４４を中心として苗植付部４がローリング自在に連結されている。メインフレーム１５に固着した支持部材と上リンク４０に一体形成したスイングアーム（図示せず）の先端部との間に昇降油圧シリンダ４６が設けられており、該シリンダ４６を油圧で伸縮させることにより、上リンク４０が上下に回動し、苗植付部４がほぼ一定姿勢のまま昇降する。 The elevating link device 3 has a parallel link configuration, and includes one upper link 40 and a pair of left and right lower links 41, 41. These links 40, 41, 41 are pivotally attached to a rear-view portal-shaped link base frame 42 erected on the rear end of the main frame 15, and a vertical link 43 is connected to the tip side thereof. ing. And the connecting shaft 44 rotatably supported by the seedling planting part 4 is inserted and connected to the lower end part of the vertical link 43, and the seedling planting part 4 is connected so as to be able to roll around the connecting shaft 44. An elevating hydraulic cylinder 46 is provided between a support member fixed to the main frame 15 and a tip of a swing arm (not shown) integrally formed with the upper link 40, and the cylinder 46 is expanded and contracted by hydraulic pressure. The upper link 40 pivots up and down, and the seedling planting part 4 moves up and down while maintaining a substantially constant posture.

苗植付部４は８条植の構成で、フレームを兼ねる伝動ケース５０、マット苗を載せて左右往復動し苗を一株分づつ各条の苗取出口５１ａ、…に供給するとともに横一列分の苗を全て苗取出口５１ａ、…に供給すると苗送りベルト５１ｂ、…により苗を下方に移送する苗載台５１、苗取出口５１ａ、…に供給された苗を圃場に植付ける苗植付装置５２、…、次行程における機体進路を表土面に線引きする左右一対の線引きマーカ５３等を備えている。 The seedling planting section 4 has an eight-row planting structure, a transmission case 50 that also serves as a frame, a mat seedling, and reciprocates left and right to supply seedlings one by one to the seedling outlet 51a, and horizontally When all the seedlings are supplied to the seedling outlet 51a, the seedling feed belt 51b is used to transfer the seedlings downward by a seedling feeding belt 51b, and the seedling planting is carried out in the field. Attaching device 52,... Includes a pair of left and right drawing markers 53 for drawing the aircraft path in the next stroke to the topsoil surface.

苗植付部４の下部には中央にセンターフロート５５、その左右両側にミドルフロート５７とサイドフロート５６がそれぞれ設けられている。これらフロート５５，５７，５６を圃場の泥面に接地させた状態で機体を進行させると、フロート５５，５７，５６が泥面を整地しつつ滑走し、その整地跡に苗植付装置５２、…により苗が植付けられる。各フロート５５，５７，５６は圃場表土面の凹凸に応じて前端側が上下動するように回動自在に取り付けられており、植付作業時にはセンターフロート５５の前部の上下動が迎角制御センサ（図示せず）により検出され、その検出結果に応じ前記昇降油圧シリンダ４６を制御する油圧バルブを切り替えて苗植付部４を昇降させることにより、苗の植付深さを常に一定に維持する。
座席３１の後方にはガード５が設けられており、作業者がリアステップ３６に乗って作業をする際にも機体上から落下しないようにしている。 In the lower part of the seedling planting part 4, a center float 55 is provided in the center, and middle floats 57 and side floats 56 are provided on the left and right sides thereof. When the aircraft is advanced with these floats 55, 57, 56 in contact with the mud surface of the field, the floats 55, 57, 56 slide while leveling the mud surface, and the seedling planting device 52, Seedlings are planted by ... Each of the floats 55, 57, and 56 is rotatably attached so that the front end side thereof moves up and down according to the unevenness of the soil surface of the field, and the vertical movement of the front part of the center float 55 is an angle-of-attack control sensor during planting work. The planting depth of the seedling is always kept constant by switching the hydraulic valve that controls the lifting hydraulic cylinder 46 according to the detection result to raise and lower the seedling planting unit 4 according to the detection result. .
A guard 5 is provided behind the seat 31 to prevent the worker from falling from the airframe when working on the rear step 36.

苗植付部４には整地装置の一例であるロータ２７（２７ａ，２７ｂ）が取り付けられている。また、苗載台５１は苗植付部４の全体を支持する左右方向と上下方向に幅一杯の矩形の支持枠体６５の支持ローラ６５ａをレールとして左右方向にスライドする構成である。 A rotor 27 (27a, 27b) which is an example of a leveling device is attached to the seedling planting unit 4. In addition, the seedling mount 51 is configured to slide in the left-right direction using a support roller 65a of a rectangular support frame 65 having a full width in the left-right direction and the vertical direction that supports the entire seedling planting unit 4 as a rail.

図３の側面図と図４の背面図に苗植付部４（線引きマーカ５３は図示せず）とロータ支持構造の要部を示し、図５にロータ２７とフロート５５〜５７と苗植付装置５２部分の要部平面図を示す。
ロータ支持構造には、苗載台５１の前記支持枠体６５の両側辺部材６５ｂに上端を回動自在に支持された梁部材６６と該梁部材６６の両端に固着した支持アーム６７と該支持アーム６７に回動自在に取り付けられたロータ支持フレーム６８が設けられている。該ロータ支持フレーム６８の下端にはロータ２７（２７ａ，２７ｂ）の駆動軸７０（７０ａ，７０ｂ）が取り付けられている。また該ロータ支持フレーム６８の下端部近くは伝動ケース５０に回動自在に取り付けられた連結部材７１に連結している。 The side view of FIG. 3 and the rear view of FIG. 4 show the seedling planting part 4 (the drawing marker 53 is not shown) and the main part of the rotor support structure, and FIG. 5 shows the rotor 27, the floats 55 to 57, and the seedling planting. The principal part top view of the apparatus 52 part is shown.
The rotor support structure includes a beam member 66 whose upper ends are rotatably supported on both side members 65b of the support frame 65 of the seedling stage 51, a support arm 67 fixed to both ends of the beam member 66, and the support. A rotor support frame 68 that is rotatably attached to the arm 67 is provided. A drive shaft 70 (70a, 70b) of the rotor 27 (27a, 27b) is attached to the lower end of the rotor support frame 68. Further, the lower end portion of the rotor support frame 68 is connected to a connecting member 71 rotatably attached to the transmission case 50.

図５に示すように、フロート５５〜５７との配置位置の関係でセンタフロート５５の前方にあるロータ２７ｂはミドルフロート５７とサイドフロート５６の前方にあるロータ２７ａより前方に配置されている。そのためロータ２７ａの駆動軸７０ａへの動力は後輪１１のギアケース１８内のギアから自在継手７２等を介して伝達され、ロータ２７ｂの駆動軸７０ｂは両方のロータ２７ａ，２７ａの駆動軸７０ａ，７０ａの車体内側の端部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７３，７３内の一対のチェーン（図示せず）から動力伝達される。 As shown in FIG. 5, the rotor 27 b in front of the center float 55 is arranged in front of the middle float 57 and the rotor 27 a in front of the side float 56 due to the arrangement position with the floats 55 to 57. Therefore, power to the drive shaft 70a of the rotor 27a is transmitted from the gear in the gear case 18 of the rear wheel 11 through the universal joint 72 and the like, and the drive shaft 70b of the rotor 27b is driven by the drive shafts 70a, 27a of both rotors 27a, 27a. Power is transmitted from a pair of chains (not shown) in a pair of left and right chain cases 73 to which power is transmitted from the end portion inside the vehicle body of 70a.

左右それぞれ３つのタイヤ１１ａ〜１１ａからなる後輪１１の後方にロータ支持アーム６７が配置されているが、ロータ支持アーム６７とロータ駆動軸７０ａを後輪１１の後方で支えてロータ２７を上下調節するロータ支持フレーム６８は左右それぞれ３つのタイヤ１１ａ〜１１ａの間で接合させることで、該ロータ支持フレーム６８と梁部材６６との接合部が後輪１１と干渉しないようにしている。 A rotor support arm 67 is disposed behind the rear wheel 11 composed of three tires 11a to 11a on the left and right sides. The rotor 27 is vertically adjusted by supporting the rotor support arm 67 and the rotor drive shaft 70a behind the rear wheel 11. The rotor support frame 68 is joined between the three tires 11 a to 11 a on the left and right sides so that the joint between the rotor support frame 68 and the beam member 66 does not interfere with the rear wheel 11.

また、機体中央部のロータ２７ｂの駆動軸７０ｂは左右一対のチェーンケース７３，７３を介して支持されているだけなので、チェーンケース７３，７３の補強のために左右一対のチェーンケース７３，７３を橋渡しする補強部材７４が設けられている。 Further, since the drive shaft 70b of the rotor 27b at the center of the machine body is only supported through a pair of left and right chain cases 73, 73, a pair of left and right chain cases 73, 73 are provided to reinforce the chain cases 73, 73. A reinforcing member 74 for bridging is provided.

さらに、ロータ２７ｂは梁部材６６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。
該一対のリンク部材７６，７７は梁部材６６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の他端部と補強部材７４に回動自在に支持された取付片７４との間に前記スプリング７８が接続している。 Further, the rotor 27b is suspended through a spring 78 by a pair of link members 76 and 77 whose upper ends are supported by the beam member 66.
The pair of link members 76 and 77 includes a first link member 76 whose one end is fixedly supported by the beam member 66 and a second link member 77 whose one end is rotatably connected to the other end of the first link 76. Thus, the spring 78 is connected between the other end of the second link member 77 and the mounting piece 74 rotatably supported by the reinforcing member 74.

ロータ２７ａ，２７ｂをロータ支持フレーム６８とロータ支持アーム６７と梁部材６６を介して上下位置調節レバー８１で上下位置を調節可能にしているが、梁部材６６と上下位置調節レバー８１との係止部を図６に示す。図６（ａ）には図４のＡ−Ａ線断面矢視図を示す、図６（ｂ）に図６（ａ）の矢印Ａ方向から視た側面図を示す。 The upper and lower positions of the rotors 27 a and 27 b can be adjusted by a vertical position adjustment lever 81 via a rotor support frame 68, a rotor support arm 67 and a beam member 66, but the beam member 66 and the vertical position adjustment lever 81 are locked. The part is shown in FIG. 6A shows a cross-sectional view taken along line AA in FIG. 4, and FIG. 6B shows a side view seen from the direction of arrow A in FIG. 6A.

上下位置調節レバー８１の下端部は断面「コ」字状のリンク部材８３と該リンク部材８３を水平方向に貫通するロッド８４により連結されている。該リンク部材８３はレバーボス８２と一体的に結合している。またレバーボス８２は側面視でＬ字状のプレート８２ａと該Ｌ字状のプレート８２ａと一体の平面プレート８２ｂとからなり、Ｌ字状プレート８２ａの中央部には支持枠体６５に支持された軸部８５が設けられ、Ｌ字状プレート８２ａは軸部８５に回動自在に支持されている。またレバーボス８２の平面プレート８２ｂは梁部材６６から突出した突出部６６ａを回転軸とするローラ８６の円筒部に接するように配置されている。 The lower end portion of the vertical position adjusting lever 81 is connected by a link member 83 having a “U” cross section and a rod 84 penetrating the link member 83 in the horizontal direction. The link member 83 is integrally coupled to the lever boss 82. The lever boss 82 is composed of an L-shaped plate 82a in side view and a flat plate 82b integrated with the L-shaped plate 82a. A shaft supported by the support frame 65 at the center of the L-shaped plate 82a. A portion 85 is provided, and the L-shaped plate 82 a is rotatably supported by the shaft portion 85. The flat plate 82b of the lever boss 82 is disposed so as to be in contact with the cylindrical portion of the roller 86 having the protrusion 66a protruding from the beam member 66 as a rotation axis.

従って上下位置調節レバー８１を図４の矢印Ｓ方向へ回動させるとレバーボス８２の平面プレート８２ｂがローラ８６を押し上げるので梁部材６６は上方に移動する。このときローラ８６は、回転しながらレバーボス８２の平面プレート８２ｂと接するので、上下調節レバー８１の操作荷重の低減が図れると共に回転体であるため摩耗がなく良好な操作性が確保できる。そしてレバーボス８２が上下に回動し、該レバーボス８２は突出部６６ａを回転軸とするローラ８６の円筒部に接するように係止しているので、該突出部６６ａがレバー８１の機体右方向（図４の矢印Ｓ方向）の回動で、上向きに梁部材６６を動かす。該突出部６６ａの前記上動により第一リンク部材７６の梁部材６６との連結部と反対側の端部も梁部材６６を中心として上向きに回動する。この第一リンク部材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２７ｂを上方に上げることができる。ロータ２７ｂを上方に移動させると、駆動軸７０ｂと駆動軸７０ａを介してロータ２７ａも同時に上方に移動する。
なお、ロータ上下位置調節レバー８１は車体２のほぼ中央部に設けているので、ロータ２７ａ，２７ｂの上下動を行う場合に左右のバランスを取りやすい。 Therefore, when the vertical position adjusting lever 81 is rotated in the direction of arrow S in FIG. 4, the flat plate 82b of the lever boss 82 pushes up the roller 86, so that the beam member 66 moves upward. At this time, since the roller 86 contacts the flat plate 82b of the lever boss 82 while rotating, the operation load of the vertical adjustment lever 81 can be reduced, and since it is a rotating body, it is free from wear and good operability can be secured. The lever boss 82 pivots up and down, and the lever boss 82 is locked so as to be in contact with the cylindrical portion of the roller 86 having the projection 66a as a rotation axis. The beam member 66 is moved upward by rotation in the direction of arrow S in FIG. Due to the upward movement of the projecting portion 66a, the end portion of the first link member 76 opposite to the connecting portion with the beam member 66 is also rotated upward about the beam member 66. By rotating the first link member 76 upward, the rotor 27b can be lifted upward via the second link member 77 and the spring 78. When the rotor 27b is moved upward, the rotor 27a is also simultaneously moved upward via the drive shaft 70b and the drive shaft 70a.
Since the rotor vertical position adjusting lever 81 is provided at substantially the center of the vehicle body 2, it is easy to balance left and right when the rotors 27a and 27b are moved up and down.

また、支持アーム６７の矢印Ｔ方向（図３）への回動でロータ支持フレーム６８が上方に移動するので、ロータ２７ａ，２７ｂを収納位置、すなわち苗載台５１の裏面側に収納状態となるように移動させることができる。 Further, since the rotor support frame 68 moves upward by the rotation of the support arm 67 in the direction of arrow T (FIG. 3), the rotors 27a and 27b are stored in the storage position, that is, in the back side of the seedling stage 51. Can be moved.

本実施例ではロータ上下位置調節レバー８１の標準位置で圃場面より４０ｍｍの高さにあるロータ２７ａ，２７ｂを図４の矢印Ｓ方向への回動させることで標準位置より最大１５ｍｍ高くでき、図４の矢印Ｓ方向の反対方向への回動で標準位置より最大１５ｍｍ低くできるように設定している。 In this embodiment, by rotating the rotors 27a and 27b at a standard position of the rotor vertical position adjusting lever 81 at a height of 40 mm from the farm scene in the direction of arrow S in FIG. 4 is set so that it can be lowered by up to 15 mm from the standard position by turning in the direction opposite to the arrow S direction.

図４に示すように左右両側の複数の外側の整地ロータ（第二側方整地ロータ）２７ａ１，２７ａ１は左右方向に延びるロータ延長駆動軸（第二側方駆動軸）７０ａ１，７０ａ１で支持されているが、該ロータ延長駆動軸７０ａ１，７０ａ１はより中央部側のロータ駆動軸（第一側方駆動軸）７０ａ，７０ａに着脱可能に取り付られており、該ロータ延長駆動軸７０ａ１，７０ａ１に装着される整地ロータ（第二側方整地ロータ）２７ａ１，２７ａ１を取り外し可能な構成としている。 As shown in FIG. 4, a plurality of outer leveling rotors (second side leveling rotors) 27a1 and 27a1 on both the left and right sides are supported by rotor extension drive shafts (second side drive shafts) 70a1 and 70a1 extending in the left-right direction. However, the rotor extension drive shafts 70a1 and 70a1 are detachably attached to the rotor drive shafts (first side drive shafts) 70a and 70a on the center side, and are attached to the rotor extension drive shafts 70a1 and 70a1. The leveling rotor (second side leveling rotor) 27a1, 27a1 to be mounted is removable.

上記構成により、苗移植機を倉庫へ格納する場合又はトラックへの積み込み時は、左右両端最外部のロータ駆動軸７０ａ１，７０ａ１と該ロータ駆動軸７０ａ１，７０ａ１に装着されるロータ２７ａ１，２７ａ１をまとめて取り外して、機体左右幅を縮小することができる。 With the above configuration, when the seedling transplanter is stored in a warehouse or loaded on a truck, the outermost rotor drive shafts 70a1 and 70a1 and the rotors 27a1 and 27a1 attached to the rotor drive shafts 70a1 and 70a1 are combined. Can be removed to reduce the width of the aircraft.

また、苗移植機を前進させるとロータ２７の前方に溜まった圃場の泥や水などが両端の外側から隣接植付苗を押し倒すように流れるような場合には、左右両端のロータ延長駆動軸７０ａ１，７０ａ１と該ロータ延長駆動軸７０ａ１，７０ａ１に装着される両端のロータ２７ａ１，２７ａ１を取り外して、機体左右幅を縮小して、左右内側のロータ２７ａ，２７ａと隣接植付苗の距離を離すことにより、ロータ２７による泥流を苗に影響しないよう調節することができる。 Further, when the seedling transplanter is advanced, mud, water, etc. collected in the field in front of the rotor 27 flows so as to push down adjacent planted seedlings from the outside of both ends, and the rotor extension drive shafts 70a1 at both left and right ends. , 70a1 and rotors 27a1, 27a1 at both ends attached to the rotor extension drive shafts 70a1, 70a1 are removed to reduce the left and right widths of the body, and the distance between the left and right inner rotors 27a, 27a and the adjacent planting seedlings is increased. Thus, the mud flow by the rotor 27 can be adjusted so as not to affect the seedling.

図７には本実施例の田植機の植付クラッチケース２５内の展開断面図を示す。図７の植付クラッチケース２５内には次の構成からなる株間変速装置Ａが設けられている。
すなわち、植付クラッチ９１にはミッションケース１２から伝動軸を介して入力軸９２に動力が伝達される。クラッチケース２５に両端が回動自在に支持される入力軸９２に設けられ並列位置に一体的に配置される大径の第１ギヤ９５と中間径の第２ギヤ９６が摺動自在に入力軸９２にスプライン係合しており、また、入力軸９２には小径の第３ギヤ９７が遊嵌されている。前記第２ギヤ９６と第３ギヤ９７との相対向する側面には互いに係合するクラッチ爪９６ａ，９７ａがそれぞれ設けられている。また、入力軸９２の入力部側には第４ギア９９と偏心ギヤ１００が固着されている。 FIG. 7 shows a developed cross-sectional view in the planting clutch case 25 of the rice transplanter of this embodiment. In the planting clutch case 25 of FIG. 7, a stock transmission A having the following configuration is provided.
That is, power is transmitted to the planting clutch 91 from the transmission case 12 to the input shaft 92 via the transmission shaft. A large-diameter first gear 95 and an intermediate-diameter second gear 96 that are provided on an input shaft 92 that is rotatably supported at both ends of the clutch case 25 and are integrally disposed in parallel positions are slidable. The third gear 97 having a small diameter is loosely fitted to the input shaft 92. Clutch claws 96 a and 97 a that are engaged with each other are provided on opposite sides of the second gear 96 and the third gear 97, respectively. Further, the fourth gear 99 and the eccentric gear 100 are fixed to the input portion side of the input shaft 92.

また、入力軸９２に平行する位置に出力軸１０１が配置されており、その一端が後述する植え付けクラッチ支持軸９１ａに係止可能に連結し、該クラッチ支持軸９１ａがクラッチケース２５を貫通して外部に設けられた自在継手１０３を介して苗植付部４（図１）に接続している。 The output shaft 101 is disposed at a position parallel to the input shaft 92, and one end of the output shaft 101 is engaged with a planting clutch support shaft 91a, which will be described later, so that the clutch support shaft 91a passes through the clutch case 25. It connects with the seedling planting part 4 (FIG. 1) through the universal joint 103 provided outside.

出力軸１０１には前記入力軸９２の第４ギヤ９９に常時噛合している第１ギヤ１０４と小径の第２ギヤ１０５と一体的な中間径の第３ギヤ１０８と大径の第４ギヤ１０９が設けられ、これらのギヤ１０５〜１０９は出力軸１０１に遊嵌している。また出力軸１０１の入力端側には不等速切替クラッチ１１０がスプライン係合されており、さらにクラッチケース２５側には入力軸９２の偏心ギヤ１００と常時噛合している偏心ギヤ１１２が遊嵌されている。 The output shaft 101 has a first gear 104 that is always meshed with the fourth gear 99 of the input shaft 92, a third gear 108 having an intermediate diameter integrated with a second gear 105 having a small diameter, and a fourth gear 109 having a large diameter. These gears 105 to 109 are loosely fitted to the output shaft 101. An inconstant speed switching clutch 110 is spline-engaged on the input end side of the output shaft 101, and an eccentric gear 112 that is always meshed with the eccentric gear 100 of the input shaft 92 is loosely fitted on the clutch case 25 side. Has been.

また、不等速切替クラッチ１１０の両側面にはクラッチ爪１１０ａ，１１０ｂが設けられており、一方のクラッチ爪１１０ａが出力軸１０１上にある第１ギヤ１０４のクラッチ爪１０４ａと係止すると、出力軸１０１の第１ギヤ１０４と一体のギヤ１０５，１０８，１０９のいずれかを介して入力軸９２から入力された駆動力が不等速切替クラッチ１１０を経由して苗植付部４へ出力される。また不等速切替クラッチ１１０の他方のクラッチ爪１１０ｂが出力軸１０１にスプライン係合している偏心ギヤ１１２のクラッチ爪（図示せず）と係止可能に設けられている。不等速切替クラッチ１１０のクラッチ爪１１０ｂと偏心ギヤ１１２のクラッチ爪が係止すると、入力軸９２から不等速で出力軸１０１と植付クラッチ支持軸９１ａを介して植付部４の苗植付具５２ａに動力伝達が行われる。 In addition, clutch claws 110 a and 110 b are provided on both side surfaces of the inconstant speed switching clutch 110, and when one clutch pawl 110 a is engaged with the clutch pawl 104 a of the first gear 104 on the output shaft 101, output is performed. The driving force input from the input shaft 92 via any one of the gears 105, 108, and 109 integrated with the first gear 104 of the shaft 101 is output to the seedling planting unit 4 via the non-uniform speed switching clutch 110. The Further, the other clutch pawl 110b of the non-uniform speed switching clutch 110 is provided so as to be able to be engaged with a clutch pawl (not shown) of the eccentric gear 112 that is spline-engaged with the output shaft 101. When the clutch pawl 110b of the unequal speed switching clutch 110 and the clutch pawl of the eccentric gear 112 are locked, the seedling planting of the planting section 4 is performed at an unequal speed from the input shaft 92 via the output shaft 101 and the planting clutch support shaft 91a. Power is transmitted to the attachment 52a.

また株間変速シフタ１１５が入力軸９２と平行位置に設けられ、該入力軸９２と平行する方向に移動できる円筒状の空隙２５ａがケース２５内に設けられている。そして該シフタ１１５にはシフタ操作端部側から順に低速側から高速側に対応した４つの凹溝１１５ａ〜１１５ｄが隣接配置されており、また前記株間変速シフタ１１５の移動できる円筒状の空隙２５ａと連通し、且つ該円筒状の空隙２５ａに直交する方向に設けたケース２５の壁面の円筒部に球１１６と該球１１６をシフタ１１５の軸心側に付勢するスプリング１１７を設けているので、前記シフタ１１５の凹溝１１５ａに球１１６が半分嵌り込むとシフタ１１５は移動できなくなり、またこの球１１６とスプリング１１７の付勢力に打ち勝つ力でシフタ１１５を押し引きするとシフタ１１５の別の凹溝１１５ｂ〜１１５ｄのいずれかに球１１６が半分嵌り込み、その位置にシフタ１１５が保持される構成になっている。
The inter-stock shift shifter 115 is provided in a position parallel to the input shaft 92, and a cylindrical gap 25 a that can move in a direction parallel to the input shaft 92 is provided in the case 25. The four grooves 115a~1 1 5d corresponding from the low-speed side to the high speed side in order from the shifter operating end portion side to the shifter 115 are arranged adjacent, also cylindrical voids that can be moved of the strains shift shifter 115 A ball 116 and a spring 117 for urging the ball 116 toward the axial center of the shifter 115 are provided on the cylindrical portion of the wall surface of the case 25 provided in a direction perpendicular to the cylindrical gap 25a. Therefore, when the ball 116 is half-fitted in the concave groove 115a of the shifter 115, the shifter 115 cannot move, and when the shifter 115 is pushed and pulled with a force that overcomes the urging force of the ball 116 and the spring 117, another concave portion of the shifter 115 is obtained. in any of the grooves 115B～ 115 d fitted ball 116 half has a configuration in which the shifter 115 is held in that position.

また、入力軸９２に遊嵌し、互いに並列位置に一体的に設けられた第１ギヤ９５と中間径の第２ギヤ９６の間にシフタ１１５に固着した板１１５ｅが係止しているので、株間変速シフタ１１５を機体進行方向を基準にして前後に動かすことで板１１５ｂにより、入力軸９２にスプライン係合している第１ギヤ９５と第２ギヤ９６が一体で左右方向に移動可能になっている。
不等速切替クラッチ１１０はクラッチケース２５の外側に設けられる不等速切替操作具１１９で図７の矢印（イ）又は（ロ）方向に摺動自在である。 Further, since the plate 115e fixed to the shifter 115 is locked between the first gear 95 and the second gear 96 having an intermediate diameter that are loosely fitted to the input shaft 92 and integrally provided in parallel with each other, By moving the inter-strain shift shifter 115 back and forth with respect to the advancing direction of the body, the plate 115b allows the first gear 95 and the second gear 96 that are spline-engaged with the input shaft 92 to move together in the left-right direction. ing.
The unequal speed switching clutch 110 is slidable in an arrow (A) or (B) direction of FIG. 7 by an unequal speed switching operation tool 119 provided outside the clutch case 25.

また、出力軸１０１の出力端部側のクラッチケース２５内には植付クラッチ９１が設けられており、ケース２５の内壁に一端が支持された植付クラッチ９１の支持軸９１ａをケース２５の中心部側に付勢するスプリング９１ｂが植付クラッチ９１を常時付勢している。また植付クラッチ９１のケース中心部側の端部は出力軸１０１の出力端部と互いにクラッチ爪９１ｃ，１０１ａにより係止可能な構成になっている。また植付クラッチ９１の外周部には植付クラッチピン９１ｄの押圧でスプリング９１ｂの付勢力に打ち勝って植付クラッチ９１をケース２５の出力端側に向けて移動させ、かつ出力軸１０１の方向に対して斜め向きの傾斜壁９１ｅを設けているので、前記出力軸１０１の出力端部のクラッチ爪１０１ａとの植付クラッチ９１のクラッチ９１ｃの係止を解放する構成になっている。 A planting clutch 91 is provided in the clutch case 25 on the output end side of the output shaft 101, and the support shaft 91 a of the planting clutch 91 whose one end is supported by the inner wall of the case 25 is used as the center of the case 25. A spring 91b biasing toward the part side always biases the planting clutch 91. Further, the end portion of the planting clutch 91 on the case center side side can be locked with the output end portion of the output shaft 101 by clutch claws 91c and 101a. Further, on the outer peripheral portion of the planting clutch 91, the planting clutch 91 is moved toward the output end side of the case 25 by overcoming the urging force of the spring 91 b by the pressing of the planting clutch pin 91 d and in the direction of the output shaft 101. On the other hand, since the inclined wall 91e that is inclined is provided, the engagement of the clutch 91c of the planting clutch 91 with the clutch pawl 101a of the output end of the output shaft 101 is released.

上記構成からなる株間変速装置Ａの伝動構成により次のような株間変速が可能となる。まず、植付クラッチピン９１ｄによる植付クラッチ９１の押圧を解除してスプリング９１ｂの付勢力で植付クラッチ９１を出力軸１０１に係止させておく。 The following inter-shaft transmission is possible by the transmission configuration of the inter-shaft transmission A having the above-described configuration. First, the pressing of the planting clutch 91 by the planting clutch pin 91d is released, and the planting clutch 91 is locked to the output shaft 101 by the urging force of the spring 91b.

次に不等速切替クラッチ１１０のクラッチ爪１１０ａと出力軸１０１上の第１ギヤ１０４の側面のクラッチ爪１０４ａを係止させておき、株間変速シフタ１１５を図示の最高速側の凹溝１１５ａに球１１６が入り込んだ状態にしたときに不等速切替操作具１１９がシフタ１２１を矢印（ロ）側に移動させていると、入力軸９２上の第１ギヤ９５と出力軸１０１上の第２ギヤ１０５を噛合させると、第２ギヤ１０５と不等速切替クラッチ１１０を介して出力軸１０１を経由して植付クラッチ９１に最高速の動力伝達が行われる。 Next, the clutch pawl 110a of the non-uniform speed switching clutch 110 and the clutch pawl 104a on the side surface of the first gear 104 on the output shaft 101 are locked, and the inter-stock shift shifter 115 is inserted into the illustrated highest-speed concave groove 115a. If the inconstant speed switching operation tool 119 moves the shifter 121 to the arrow (b) side when the ball 116 is in the state of entering, the first gear 95 on the input shaft 92 and the second gear on the output shaft 101 are moved. When the gear 105 is engaged, the fastest power is transmitted to the planting clutch 91 via the output shaft 101 via the second gear 105 and the inconstant speed switching clutch 110.

また不等速切替操作具１１９によりシフタ１２１を矢印（ロ）側に寄せているときに、株間変速シフタ１１５が図示の最高速凹溝１１５ａの隣の凹溝１１５ｂに球１１６が入り込んだ状態にあると板１１５ｅの右方向へのスライドで入力軸９２上の第２ギヤ９６と出力軸１０１上の第３ギヤ１０８が噛合し、不等速切替クラッチ１１０から出力軸１０１を経由して植付クラッチ９１に２番目に高い速度で動力伝達が行われる。 Further, when the shifter 121 is moved to the arrow (b) side by the unequal speed switching operation tool 119, the inter-stock shift shifter 115 is in a state in which the ball 116 has entered the concave groove 115b adjacent to the illustrated high-speed concave groove 115a. When the plate 115e slides to the right, the second gear 96 on the input shaft 92 meshes with the third gear 108 on the output shaft 101, and planted from the inconstant speed switching clutch 110 via the output shaft 101. Power is transmitted to the clutch 91 at the second highest speed.

さらに不等速切替操作具１１９がシフタ１２１を矢印（ロ）側に寄せているときに、株間変速シフタ１１５が図示の最高速凹溝１１５ａから３つ目の凹溝１１５ｃに球１１６が入り込んだ状態であると、入力軸９２上の第２ギヤ９６のクラッチ爪９６ａと第３ギヤ９７のクラッチ爪９７ａが係止され、該第３ギヤ９７と出力軸１０１上の第４ギヤ１０９が噛合されて第３ギヤ１０８，第２ギヤ１０５、第１ギヤ１０４、不等速切替クラッチ１１０を介して出力軸１０１を経由して植付クラッチ９１に３番目の高速の動力伝達が行われる。 Furthermore, when the unequal speed switching operation tool 119 moves the shifter 121 to the arrow (B) side, the inter-stock shift shifter 115 enters the ball 116 into the third concave groove 115c from the illustrated highest speed concave groove 115a. In this state, the clutch pawl 96a of the second gear 96 on the input shaft 92 and the clutch pawl 97a of the third gear 97 are locked, and the third gear 97 and the fourth gear 109 on the output shaft 101 are engaged. Then, the third high-speed power transmission is performed to the planting clutch 91 via the output shaft 101 via the third gear 108, the second gear 105, the first gear 104, and the inconstant speed switching clutch 110.

また、不等速切替操作具１１９がシフタ１２１を矢印（イ）側に移動させ、株間変速シフタ１１５が図示の最低速凹溝１１５ｄに球１１６が入り込んだ状態に移動させると、入力軸９２上の第３ギヤ９７と出力軸１０１上の第４ギヤ１０９とで伝動し、さらに出力軸１０１上の第１ギヤ１０４と入力軸９２上の第４ギヤ９９を噛合して、常時噛合している入力軸９２上の偏心ギヤ１００と出力軸１０１上の偏心ギア１１２と該ギヤ１１２と不等速切替クラッチ１１０から、該不等速クラッチ１１０と一体回転する出力軸１０１を経由して植付クラッチ９１の最低速の動力伝達が行われる。
偏心ギヤ１００、１１２の噛合で苗植付具５２ａは、苗の植え付け時に比べてそれ以外の作動時には作動速度が遅くなるので不等速運動をする。 Further, when the inconstant speed switching operation tool 119 moves the shifter 121 to the arrow (b) side and the inter-stock shift shifter 115 moves to the state where the ball 116 enters the illustrated minimum speed concave groove 115d, the input shaft 92 is moved. The third gear 97 and the fourth gear 109 on the output shaft 101 are transmitted, and the first gear 104 on the output shaft 101 and the fourth gear 99 on the input shaft 92 are meshed with each other at all times. The eccentric gear 100 on the input shaft 92, the eccentric gear 112 on the output shaft 101, the gear 112, and the non-constant speed switching clutch 110, and the planting clutch via the output shaft 101 that rotates integrally with the non-constant speed clutch 110. 91 is the lowest speed power transmission.
The engagement of the eccentric gears 100 and 112 causes the seedling planting tool 52a to move at a non-uniform speed because the operation speed is slower during other operations than when a seedling is planted.

一般に、例えば比較的広目に株間を設定すると不等速状態で苗を植付けることになるため、植付クラッチ９１が脈動し、特に高速で前進すると脈動が増加し易くなる。
そこで、本実施例では、図８（ａ）の側面図及び図８（ｂ）の斜視図に示すように、機体の座席３１の右側に配置された株間レバー１２３を、回動中心１２３ｄを支点として矢印Ａ方向に操作して疎植側に移動させると、株間レバー１２３と一体のアーム１２３ａが図７に示す株間変速シフタ１１５を適切な位置に移動させ（図７の凹溝１１５ｄに球１１６は入る）、植付クラッチ９１の作動位置にセットし、同時に株間レバー１２３と一体の車速規制アーム１２３ｂの先端を走行変速装置の変速領域を設定する変速レバー１２４の基部の一端に当接させることで変速レバー１２４の揺動軸１２４ａを中心とする揺動を規制して車速制限して、苗の植付を安定化させる。 In general, for example, when the strain is set relatively wide, seedlings are planted at an inconstant speed, so that the planting clutch 91 pulsates, and the pulsation tends to increase particularly when the clutch moves forward at a high speed.
Therefore, in this embodiment, as shown in the side view of FIG. 8A and the perspective view of FIG. 8B, the inter-stock lever 123 disposed on the right side of the seat 31 of the machine body is supported by the rotation center 123d. As shown in FIG. 7, the arm 123a integrated with the stock lever 123 moves the stock shift shifter 115 shown in FIG. 7 to an appropriate position (the ball 116 in the concave groove 115d in FIG. 7). Is set to the operating position of the planting clutch 91, and at the same time, the tip of the vehicle speed regulating arm 123b integrated with the inter-stock lever 123 is brought into contact with one end of the base of the speed change lever 124 that sets the speed change region of the travel transmission. Thus, the swinging of the shift lever 124 around the swinging shaft 124a is restricted to limit the vehicle speed, thereby stabilizing the seedling planting.

また、変速レバー１２４により変速装置であるＨＳＴ２３で設定された速度段をさらに高、中、低段のいずれかに変速する副変速装置のいずれかの変速段を手動で選択する副変速レバー１２５（図９参照）を操作して苗の植付時に用いる作業速の変速段から路上走行時の変速段である移動速に変速すると、車速規制を解除することができる構成を採用する。 Further, a sub-transmission lever 125 (manually selecting one of the shift stages of the sub-transmission apparatus that shifts the speed stage set by the transmission lever HST23, which is a transmission apparatus, to a higher, middle, or lower stage. When the operation speed is changed to the moving speed, which is the shift speed when traveling on the road, from the shift speed of the working speed used when planting seedlings by operating (see FIG. 9), a configuration that can release the vehicle speed restriction is adopted.

図９にはそのための構成を示すが、副変速レバー１２５が図９の矢印Ａ方向に操作されて植付速から移動速に変速されると、ワイヤ１２６を介して、株間レバー１２３に取り付けられた車速規制アーム１２３ｂがその回動軸１２３ｅを中心に矢印Ｂ方向（図８，図９）に回動し、車速規制アーム１２３ｂが図８に示す変速レバー１２４の移動領域Ｍから左右方向に外れることで、車速規制を解除することができる。 FIG. 9 shows a configuration for this purpose. When the sub-shift lever 125 is operated in the direction of arrow A in FIG. 9 and shifted from the planting speed to the moving speed, it is attached to the stock lever 123 via the wire 126. The vehicle speed regulating arm 123b pivots about the pivot shaft 123e in the direction of arrow B (FIGS. 8 and 9), and the vehicle speed regulating arm 123b deviates from the moving region M of the speed change lever 124 shown in FIG. Thus, the vehicle speed regulation can be released.

なお、図８に示すように、前記回動軸１２３ｅは株間レバー１２３の基部から突出する突出部１２３ｆに一端を支持され、車速規制アーム１２３ｂと一体の回動軸支持筒部１２３ｃを、ワイヤ１２６で引かれても図示しないスプリングにより図８（ｂ）に示す状態に戻すように付勢しながら回動自在に支持する。 As shown in FIG. 8, the pivot shaft 123e is supported at one end by a projecting portion 123f projecting from the base of the inter stock lever 123, and the pivot shaft supporting cylinder portion 123c integrated with the vehicle speed regulating arm 123b is connected to the wire 126. Even if pulled, the spring is supported so as to be rotatable while being urged to return to the state shown in FIG.

苗載台５１には圃場方向に向けて苗送りベルト５１ｂを移動させるためにワンウェイクラッチ付きのベルト送り軸６０（プーリ６４の駆動軸）を設けているが、図１０に苗載台５１の要部側面図を示すように、苗送りベルト５１ｂを動かすベルト送り軸６０は隣接配置された苗送りカウンタ軸６２にリンク機構でリンクしている。すなわち苗送りカウンタ軸６２にはカウンタアーム６２ａの基部が固定され、該カウンタアーム６２ａの先端部に回動自在に苗送りアーム６０ｂの一端が連結されており、該苗送りアーム６０ｂの他端にはベルト送り軸６０に固定された送り軸片６０ａが回動自在に連結されている。また、カウンタアーム６２ａが苗送りアーム６０ｂとの連結関係で死点越えをしないように苗送りカウンタ軸６２の近くに死点越え防止用ストッパ６３を配置している。従ってカウンタ軸６２の揺動範囲（矢印Ａ）が死点を越えない範囲で規制されながら苗送りアーム６０ｂを介してベルト送り軸６０を揺動範囲（矢印Ｂ）で動かすことができる（矢印Ａの揺動角度＜矢印Ｂの揺動角度）。 The seedling stage 51 is provided with a belt feed shaft 60 with a one-way clutch (drive shaft of the pulley 64) for moving the seedling feeding belt 51b in the direction of the field. As shown in the partial side view, the belt feed shaft 60 that moves the seedling feed belt 51b is linked to the seedling feed counter shaft 62 that is disposed adjacent thereto by a link mechanism. That is, the base of the counter arm 62a is fixed to the seedling feed counter shaft 62, and one end of the seedling feeding arm 60b is rotatably connected to the tip of the counter arm 62a, and the other end of the seedling feeding arm 60b is connected. The feed shaft piece 60a fixed to the belt feed shaft 60 is rotatably connected. Further, a dead point excess stopper 63 is disposed near the seedling feed counter shaft 62 so that the counter arm 62a does not exceed the dead point due to the connection relationship with the seedling feed arm 60b. Accordingly, the belt feed shaft 60 can be moved within the swing range (arrow B) via the seedling feed arm 60b while the swing range (arrow A) of the counter shaft 62 is regulated within a range not exceeding the dead point (arrow A). Swaying angle <swinging angle of arrow B).

上記構成でカウンタ軸６２の揺動範囲が死点を越えない範囲で規制されているため、死点越えを防ぎながらリンク機構でベルト送り軸６０の揺動範囲を大きくすることで小スペースで大きい苗送り量を得ることができる。従来は、ストッパ無しで死点越えを防ぐような揺動範囲の設定のため、リンク機構自体を大きくしなければならなかった。 With the above configuration, the swing range of the counter shaft 62 is restricted within a range that does not exceed the dead point. Therefore, by increasing the swing range of the belt feed shaft 60 with the link mechanism while preventing the dead point from being exceeded, it is large in a small space. The seedling feed amount can be obtained. Conventionally, the link mechanism itself had to be enlarged in order to set a swing range that prevents the dead center from being exceeded without a stopper.

また図１１の斜視図に示すようにベルト送り軸６０のワンウェイクラッチにはベルト送り軸６０の矢印Ｃ方向への戻り用の付勢力を与えるスプリング６０ｃを設けておくことで、ベルト送り軸６０を元の位置に容易に復帰させる効果がある。 Further, as shown in the perspective view of FIG. 11, the one-way clutch of the belt feed shaft 60 is provided with a spring 60c for applying a urging force for returning the belt feed shaft 60 in the direction of arrow C. There is an effect of easily returning to the original position.

苗植付装置５２の苗植付具５２ａへは伝動ケース５０内の図示しない駆動部から図１２に示す駆動チェーン４７を介して動力が伝達されるが、該駆動チェーン４７は伝動ケース５０に支持された板バネ４８でチェーン４７の張り具合を調整できる。 Power is transmitted to the seedling planting tool 52a of the seedling planting device 52 from a drive unit (not shown) in the transmission case 50 via a drive chain 47 shown in FIG. 12, and the drive chain 47 is supported by the transmission case 50. The tension of the chain 47 can be adjusted by the formed leaf spring 48.

また同時に伝動ケース５０の外部から内部に向けてチェーン４７に直交する方向に挿脱可能なボルト４９の先端部を板バネ４８に当接させることで、チェーン４７の張り具合を調整できる。
こうして、適正な張力の状態でチェーン４７をボルト４９で保持することで、不要なチェーン４７のゆるみを防止でき、植付具５２ａの作動の脈動が改善できる。 At the same time, the tension of the chain 47 can be adjusted by bringing the tip of the bolt 49 that can be inserted and removed in the direction perpendicular to the chain 47 from the outside to the inside of the transmission case 50 against the leaf spring 48.
Thus, by holding the chain 47 with the bolt 49 in an appropriate tension state, unnecessary loosening of the chain 47 can be prevented, and the pulsation of the operation of the planting tool 52a can be improved.

また、図１３に示すように、伝動ケース５０の外部から内部に向けてチェーン４７に直交する方向に挿脱可能なボルト４９の先端部を取付け、ボルト止め用にロックナット４５の穴を貫通し、キャップ４５ａで閉じる構成にしても良い。 Further, as shown in FIG. 13, a tip end of a bolt 49 that can be inserted and removed in the direction orthogonal to the chain 47 is attached from the outside to the inside of the transmission case 50, and the hole of the lock nut 45 is passed through for fastening the bolt. The cap 45a may be closed.

また、図１４に示すように機体前方に燃料タンク２８を装着させ、さらに機体前面のバンパ部に燃料タンクガード２ａと乗降用補助ステップ２ｂを兼ねた部材を設けても良い。この様な構成を採用することで、設備費コストのダウンと意匠的効果を出すことができる。さらに燃料タンク２８の燃料供給口２８ａを燃料タンクガード２ａで防護できる。 Further, as shown in FIG. 14, a fuel tank 28 may be mounted in front of the fuselage, and a member serving both as a fuel tank guard 2a and an auxiliary boarding step 2b may be provided in the bumper portion on the front of the fuselage. By adopting such a configuration, the equipment cost can be reduced and a design effect can be obtained. Further, the fuel supply port 28a of the fuel tank 28 can be protected by the fuel tank guard 2a.

また、燃料タンクガード２ａに取り付ける補助ステップ２ｂの高さを安全鑑定等の公的基準高さと燃料タンク２８の燃料供給口２８ａ（管路部分を含む）の最低高さ位置との間に設けることで、安全鑑定等の公的基準高さをクリアすると同時に燃料タンク２８の燃料供給口２８ａの破損を防ぐこともできる。 Further, the height of the auxiliary step 2b to be attached to the fuel tank guard 2a is provided between the official reference height such as safety appraisal and the minimum height position of the fuel supply port 28a (including the pipe line portion) of the fuel tank 28. Thus, it is possible to prevent the fuel supply port 28a of the fuel tank 28 from being damaged at the same time as clearing the official reference height such as safety appraisal.

本発明によれば、株間を広くとっても植付精度を向上させることができる機能的な苗移植機が得られる。 ADVANTAGE OF THE INVENTION According to this invention, even if it takes widely between strains, the functional seedling transplanting machine which can improve a planting precision is obtained.

本発明の実施例の乗用型田植機の側面図である。It is a side view of the riding type rice transplanter of the Example of this invention. 図１の乗用型田植機の平面図である。It is a top view of the riding type rice transplanter of FIG. 図１の苗植付部の要部側面図である。It is a principal part side view of the seedling planting part of FIG. 図１の苗載台の支持構造の要部背面図である。It is a principal part rear view of the support structure of the seedling stand of FIG. 図１の苗植付部の要部平面図である。It is a principal part top view of the seedling planting part of FIG. 図１の苗植付部のロータの上下位置調節レバーと梁部材との係止関係を説明する図である。It is a figure explaining the latching relationship of the up-and-down position adjustment lever and beam member of the rotor of the seedling planting part of FIG. 図１の乗用型田植機の植付クラッチケースの展開断面図であるIt is an expanded sectional view of the planting clutch case of the riding type rice transplanter of FIG. 図１の乗用型田植機の株間レバーと変速レバーの取付部の側面図（図８（ａ））と斜視図（図８（ｂ））である。They are the side view (FIG. 8 (a)) and perspective view (FIG.8 (b)) of the attachment part of the inter-stock lever of the riding type rice transplanter of FIG. 1, and a transmission lever. 図１の乗用型田植機の副変速レバーと車速規制アームの連繋関係を説明する図である。It is a figure explaining the connection relation of the subtransmission lever and vehicle speed control arm of the riding type rice transplanter of FIG. 図１の乗用型田植機の苗載台付近の要部側面図である。It is a principal part side view of the riding type rice transplanter of FIG. 図１０のワンウエイクラッチの取付構造の説明図である。It is explanatory drawing of the attachment structure of the one-way clutch of FIG. 図１の苗植付部の伝動ケース内部のチェーンとボルトの取付構造を示す図である。It is a figure which shows the attachment structure of the chain and volt | bolt inside the transmission case of the seedling planting part of FIG. 図１の苗植付部の伝動ケース内部のチェーンとボルトの取付構造を示す図である。It is a figure which shows the attachment structure of the chain and volt | bolt inside the transmission case of the seedling planting part of FIG. 図１の田植機の機体前方に設けた燃料タンクとそのガード部材部分の側面図（図１４（ａ））とガード部材の斜視図（図１４（ｂ））である。It is the side view (FIG. 14 (a)) of the fuel tank provided in the body front of the rice transplanter of FIG. 1, its guard member part, and the perspective view (FIG.14 (b)) of a guard member.

Explanation of symbols

１乗用型田植機２走行車体
２ａ燃料タンクガード２ｂ乗降用補助ステップ
３昇降リンク装置４苗植付部
５ガード１０前輪
１１後輪１２ミッションケース
１３前輪ファイナルケース１５メインフレーム
１８後輪ギヤケース２０エンジン
２１ベルト伝動装置２３ＨＳＴ
２５植付クラッチケース２５ａ空隙
２６植付伝動軸２７（２７ａ，２７ｂ）ロータ
２７ａ１，２７ａ１外側ロータ２８燃料タンク
２８ａ燃料供給口３０エンジンカバー
３１座席３２フロントカバー
３４ハンドル３５フロアステップ
３６リヤステップ３８予備苗載台
４０上リンク４１下リンク
４２リンクベースフレーム４３縦リンク
４４連結軸４５ロックナット
４５ａキャップ４６昇降油圧シリンダ
４７駆動チェーン４８板バネ
４９ボルト５０伝動ケース
５１苗載台５１ａ苗取出口
５１ｂ苗送りベルト５２苗植付装置
５２ａ苗植付具５３線引きマーカ
５５センターフロート５６サイドフロート
５７ミドルフロート６０ベルト送り軸
６０ａ送り軸片６０ｂ苗送りアーム
６０ｃスプリング６２苗送りカウンタ軸
６２ａカウンタアーム６３死点越え防止用ストッパ
６４プーリ６５苗植付部支持枠体
６５ａ支持ローラ６５ｂ両側辺部材
６６梁部材６６ａ突出部
６７支持アーム６８ロータ支持フレーム
７０ａ，７０ｂロータ駆動軸７０ａ１，７０ａ１ロータ延長駆動軸
７１連結部材７２自在継手
７３チェーンケース７４補強部材
７４ａ取付片７６，７７リンク部材
７８スプリング８１ロータ上下位置調節レバー
８２レバーボス８２ａＬ字状プレート
８２ｂ平面プレート８３断面「コ」字状のリンク部材
８４ロッド８５軸
８６ローラ９１植付クラッチ
９１ａ植付クラッチ支持軸９１ｂスプリング
９１ｃクラッチ爪９１ｄ植付クラッチピン
９１ｅ斜め向きの傾斜壁９２入力軸
９５第１ギヤ９６第２ギヤ
９７第３ギヤ９６ａ，９７ａクラッチ爪
９９第４ギア１００偏心ギヤ
１０１出力軸１０１ａクラッチ爪
１０３自在継手１０４第１ギヤ
１０４ａクラッチ爪１０５第２ギヤ
１０８第３ギヤ１０９第４ギヤ
１１０不等速切替クラッチ１１０ａ，１１０ｂクラッチ爪
１１２偏心ギヤ１１５株間変速シフタ
１１５ａ〜１１５ｄ凹溝１１５ｅ板
１１６球１１７スプリング
１１９不等速切替操作具１２１シフタ
１２３株間レバー１２３ａアーム
１２３ｂ車速規制アーム１２３ｃ回動軸支持筒部
１２３ｄ回動中心１２３ｅ回動軸
１２３ｆ突出部１２４変速レバー
１２５副変速レバー１２６ワイヤ
Ａ株間変速装置 DESCRIPTION OF SYMBOLS 1 Riding type rice transplanter 2 Traveling vehicle body 2a Fuel tank guard 2b Entry / exit auxiliary step 3 Lifting link device 4 Seedling planting part 5 Guard 10 Front wheel 11 Rear wheel 12 Mission case 13 Front wheel final case 15 Main frame 18 Rear wheel gear case 20 Engine 21 Belt drive 23 HST
25 Planting clutch case 25a Gap 26 Planting transmission shaft 27 (27a, 27b) Rotor 27a1, 27a1 Outer rotor 28 Fuel tank 28a Fuel supply port 30 Engine cover 31 Seat 32 Front cover 34 Handle 35 Floor step 36 Rear step 38 Spare seedling Platform 40 Upper link 41 Lower link 42 Link base frame 43 Vertical link 44 Connection shaft 45 Lock nut 45a Cap 46 Lifting hydraulic cylinder 47 Drive chain 48 Leaf spring 49 Bolt 50 Transmission case 51 Seedling platform 51a Seedling outlet 51b Seedling feed belt 52 Seedling planting device 52a Seedling planting tool 53 Drawing marker 55 Center float 56 Side float 57 Middle float 60 Belt feed shaft 60a Feed shaft piece 60b Seedling feed arm 60c Spring 62 Seedling feed cow Counter shaft 63 Stopper crossing prevention stopper 64 pulley 65 seedling planting support frame 65a support roller 65b side members 66 beam member 66a protrusion 67 support arm 68 rotor support frame 70a, 70b rotor drive shaft 70a1, 70a1 Rotor extension drive shaft 71 Connecting member 72 Universal joint 73 Chain case 74 Reinforcing member 74a Mounting piece 76, 77 Link member 78 Spring 81 Rotor vertical position adjusting lever 82 Lever boss 82a L-shaped plate 82b Planar plate 83 Cross section "U" shape Link member 84 Rod 85 Shaft 86 Roller 91 Planting clutch 91a Planting clutch support shaft 91b Spring 91c Clutch claw 91d Planting clutch pin 91e Slanting wall 92 Input shaft 95 First gear 96 Second gear 97 Third gear 96a, 97a Clutch pawl 99 Fourth gear 100 Eccentric gear 101 Output shaft 101a Clutch pawl 103 Universal joint 104 First gear 104a Clutch pawl 105 Second gear 108 Third gear 109 Fourth gear 110 Unequal speed switching clutch 110a, 110b Clutch Claw 112 Eccentric gear 115 Stock shift shifters 115a to 115d Groove 115e Plate 116 Ball 117 Spring 119 Unequal speed switching operation tool 121 Shifter 123 Stock lever 123a Arm 123b Vehicle speed regulating arm 123c Rotating shaft support cylinder portion 123d Rotation center 123e times Driving shaft 123f Protruding portion 124 Transmission lever 125 Sub transmission lever 126 Wire A Inter-strain transmission

Claims

A traveling vehicle body (2) having a seat (31) and an engine (20) mounted on the traveling vehicle body (2) are provided, and power from the engine (20) is transmitted to the transmission case (12) via the transmission (23). ) And the transmission power and the external take-out power are separated in the transmission case (12), and a speed change means (124) for adjusting the travel speed by operating the transmission (23) is provided. 2) A seedling planting part (4) is mounted on the rear side through a lifting link device (3), and a seedling planting part (4) is mounted with a transmission case (50) that also serves as a frame and a mat seedling. When the seedlings are reciprocated to the left and right, the seedlings are fed to the seedling outlet (51a) for each line and all seedlings for one horizontal row are supplied to the seedling outlet (51a), the seedlings are lowered by the seedling feeding belt (51b). To the seedling stage (51) to be transferred to the plant and the seedling outlet (51a) A seedling planting device (52) provided with a seedling planting tool (52a) for planting the fed seedling into the field is provided, and the external take-out power separated in the mission case (12) is used as the rear part of the traveling vehicle body (2). A seedling transplanting machine configured to transmit to the seedling planting part (4) from the planting clutch case (25) via the planting transmission shaft (26),
The operation speed of the seedling planting tool (52a) with respect to the traveling speed can be changed, and the operation speed of the seedling planting tool (52a) is transmitted at an infinite speed so as to increase at the timing of seedling planting. Inter-strain transmission (A) having a transmission mechanism (100, 112);
An inter-strain changing means (123) for changing the planting interval of the seedlings by changing the operating speed of the seedling planting tool (52a) by the inter-strain transmission (A) is provided,
When the inter-strain changing means (123) sets the inter-strain to the wide side, the inter-strain transmission (A) operates the seedling planting tool (52a) via the inequal speed transmission mechanism (100, 112). With a configuration that can
When the stock change means (123) sets the stock to the wide side, a restriction means (123b) for restricting the speed change means (124) to shift to the high speed side is provided,
In addition to the transmission (23), a sub-transmission that can shift to a traveling speed for traveling on the road is provided.
A seedling transplanting machine comprising a regulation releasing means for releasing the regulation of the regulating means (123b) in conjunction with the shift to the moving speed by the auxiliary transmission .

An inter-strain transmission (A) is provided in the planting clutch case (25). The inter-strain transmission (A) includes an inter-strain transmission shifter (115) that switches a transmission ratio to the planting transmission shaft (26), and an inconstant speed. In a state of transmitting to the planting transmission shaft (26) via the transmission mechanism (100, 112) and in a state of transmitting to the planting transmission shaft (26) without passing through the inconstant speed transmission mechanism (100, 112). An inequal speed switching operation tool (119) for switching is provided, the speed change means (124) is a speed change lever that swings around the swing shaft (124a), and the inter-stock change means (123) is the center of rotation (123d). The inter-lever lever that pivots on the fulcrum, the speed change means (124) and the inter-stock change means (123) are arranged on the right side of the seat (31), and the restricting means (123b) is a vehicle speed restriction integrated with the inter-stock change means (123). The arm and the operation of the stock change means (123) Accordingly, when the inter-stock change shifter (115) is switched to the sparse planting side, the restricting means (123b) comes into contact with the speed change means (124) and the speed change means (124) It is configured to regulate swinging to the high speed side ,
The restricting means (123b) has a rotation shaft (123e) serving as a rotation fulcrum,
The restriction release means moves from the movement region (M) of the transmission means (124) by the restriction means (123b) turning about the rotation shaft (123e) in conjunction with the shift to the moving speed by the auxiliary transmission. The seedling transplanting machine according to claim 1, wherein the regulating means (123b) is removed .

The counter arm (62a) is fixed to the seedling feed counter shaft (62), the one-way clutch and the feed shaft piece (60a) are fixed to the belt feed shaft (60), and the counter arm (62a) and the feed shaft piece (60a) are attached. The seedling feed arm (60b) is connected, and the seedling feed counter shaft (62) is driven to operate the seedling feed belt (51b) via the belt feed shaft (60). Provided with a stopper (63) that prevents the counter arm (62a) from exceeding the dead point ,
The seedling transplanter according to claim 1 or 2 , wherein the dead point exceeding stopper (63) is configured to prevent the dead point exceeding when the seedling feeding belt (51b) is operated .

In the transmission case (50), a chain (47) is provided for transmission to the seedling planting tool (52a), and a leaf spring (48) for tensioning the chain (47) is provided, from the outside to the inside of the transmission case (50). The tip of the bolt (49) that can be inserted and removed in a direction perpendicular to the chain (47) is brought into contact with the leaf spring (48), and the tension of the chain (47) is adjusted by the bolt (49). the fuel tank (28) provided on the body front, one of claims 1, characterized in that a member which also serves as the boarding for the auxiliary steps and the fuel tank guard (2a) (2b) to the body front surface of claim 3 The seedling transplanter according to claim 1 .