JP2008306947A - Walking type seedling transplanter - Google Patents

Walking type seedling transplanter Download PDF

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Publication number
JP2008306947A
JP2008306947A JP2007155303A JP2007155303A JP2008306947A JP 2008306947 A JP2008306947 A JP 2008306947A JP 2007155303 A JP2007155303 A JP 2007155303A JP 2007155303 A JP2007155303 A JP 2007155303A JP 2008306947 A JP2008306947 A JP 2008306947A
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seedling
transmission case
planting
frame
hydraulic
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JP2007155303A
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Inventor
Isao Ishida
石田  伊佐男
Masakatsu Araki
正勝 荒木
Toshio Tamai
玉井  利男
Junichi Fujiwara
潤一 藤原
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Iseki and Co Ltd
Iseki Agricultural Machinery Mfg Co Ltd
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Iseki and Co Ltd
Iseki Agricultural Machinery Mfg Co Ltd
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Priority to JP2007155303A priority Critical patent/JP2008306947A/en
Publication of JP2008306947A publication Critical patent/JP2008306947A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a walking type seedling transplanter solving a problem that when a walking type seedling transplanter has a constitution that a spare seedling table is supported on a planting transmission case or a rear frame and a planting part composed of the planting transmission case, a seedling planting apparatus and a seedling table is removed for repair, the spare seedling table also has to be removed and consequently repairs and checks become difficult. <P>SOLUTION: The walking type seedling transplanter is equipped with the planting transmission case (7) to which power is transmitted from a main transmission case (3), the seedling planting apparatus (10) that is driven by the power from the planting transmission case (7) and takes seedlings on a seedling-taking-out part and plants them in a field, and the seedling table (11) for supplying seedlings for each stock to the seedling-taking-out part. A frame extending from the main transmission case (3) to the rear is divided into a front frame (6) and a rear frame (8), the spare seedling table (45) is supported on the front frame (6), and the planting transmission case (7), the seedling planting apparatus (10), the seedling table (11) and a steering handle (9) are supported on the rear frame (8). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、歩行型の苗移植機に関する。   The present invention relates to a walking type seedling transplanter.

歩行型の苗移植機の一例である歩行型田植機において、機体の前部に配置した主伝動ケースと、該主伝動ケースの左右に配置した走行伝動ケースと、該走行伝動ケースからの動力で駆動する左右各々の車輪と、主伝動ケースからの動力が伝達される植付伝動ケースと、該植付伝動ケースからの動力で駆動し苗取口上の苗を取って圃場に植え付ける苗植付装置と、前記苗取口に一株分ずつ苗を供給する苗載台とを設け、前記主伝動ケースから後方に延びるフレームを前部フレームと前記植付伝動ケースと後部フレームとに分割し、後部フレームに苗植付装置、苗載台及び操縦ハンドルを支持させて設けたものが知られている(特許文献1参照。)。
特開2001−258311号公報
In the walking type rice transplanter which is an example of the walking type seedling transplanter, the main transmission case arranged at the front of the aircraft, the traveling transmission case arranged on the left and right of the main transmission case, and the power from the traveling transmission case The left and right wheels to be driven, the planting transmission case to which the power from the main transmission case is transmitted, and the seedling planting device that is driven by the power from the planting transmission case to take the seedling on the seedling outlet and plant it in the field And a seedling platform that supplies seedlings to the seedling outlet one by one, and a frame extending rearward from the main transmission case is divided into a front frame, the planting transmission case, and a rear frame, There is known one in which a seedling planting device, a seedling stage and a steering handle are supported on a frame (see Patent Document 1).
JP 2001-258311 A

上記背景技術の構成において、予備苗載台を植付伝動ケース又は後部フレームで支持する構成とすると、修理等のために植付伝動ケース、苗植付装置及び苗載台からなる植付部を取り外すときに、予備苗載台も取り外さなければならず、修理や点検が困難である。   In the configuration of the background art described above, when the preliminary seedling stage is supported by the planting transmission case or the rear frame, a planting unit including a planting transmission case, a seedling planting device, and a seedling stage is provided for repair or the like. At the time of removal, the spare seedling stage must also be removed, which makes repair and inspection difficult.

また、上記背景技術によると、修理等のために植付伝動ケースを取り外すとき、後部フレーム及び操縦ハンドルも植付伝動ケースと共に取り外さなければならず、取り外す部分が大掛かりになって修理や点検が困難である。   In addition, according to the above background art, when removing the planting transmission case for repair, etc., the rear frame and the steering handle must be removed together with the planting transmission case, and the removed part becomes large and difficult to repair and check. It is.

この発明は、上記課題を解決するべく次のような技術的手段を講じた。
すなわち、請求項1に係る発明は、機体の前部に配置した主伝動ケース(3)と、該主伝動ケース(3)の左右に配置した走行伝動ケース(4)と、該走行伝動ケース(4)からの動力で駆動する左右各々の車輪(5)と、主伝動ケース(3)からの動力が伝達される植付伝動ケース(7)と、該植付伝動ケース(7)からの動力で駆動し苗取口(28)上の苗を取って圃場に植え付ける苗植付装置(10)と、前記苗取口(28)に一株分ずつ苗を供給する苗載台(11)とを設け、前記主伝動ケース(3)から後方に延びるフレームを前部フレーム(6)と後部フレーム(8)とに分割し、前部フレーム(6)に予備苗載台(45)を支持させて設け、後部フレーム(8)に植付伝動ケース(7)、苗植付装置(10)、苗載台(11)及び操縦ハンドル(9)を支持させて設けた歩行型の苗移植機とした。
In order to solve the above problems, the present invention has taken the following technical means.
That is, the invention according to claim 1 includes a main transmission case (3) disposed at the front of the airframe, a traveling transmission case (4) disposed on the left and right of the main transmission case (3), and the traveling transmission case ( 4) The left and right wheels (5) driven by the power from 4), the planting transmission case (7) to which the power from the main transmission case (3) is transmitted, and the power from the planting transmission case (7) And a seedling planting device (10) for taking seedlings on the seedling outlet (28) and planting them in the field, and a seedling platform (11) for supplying seedlings to the seedling outlet (28) one by one A frame extending backward from the main transmission case (3) is divided into a front frame (6) and a rear frame (8), and the front seedling stage (45) is supported by the front frame (6). The rear frame (8) has a planting transmission case (7), a seedling planting device (10), and a seedling mount (11). And a fine control handle (9) by the support provided gait type seedlings transplanter.

従って、この歩行型の苗移植機は、主伝動ケース(3)からの動力が走行伝動ケース(4)を介して左右の車輪(5)へ伝達され、該左右の車輪(5)で走行する。また、主伝動ケース(3)からの動力が植付伝動ケース(7)を介して苗植付装置(10)へ伝達され、該苗植付装置(10)で圃場に苗を植え付けていく。そして、修理等のために植付伝動ケース(7)、苗植付装置(10)、苗載台(11)及び操縦ハンドル(9)を取り外すとき、予備苗載台(45)を前部フレーム(6)側に残したまま取り外すことができる。また、修理等のために、主伝動ケース(3)、走行伝動ケース(4)、車輪(5)、前部フレーム(6)及び予備苗載台(45)を一体で取り外すことができる。   Therefore, in this walking type seedling transplanter, the power from the main transmission case (3) is transmitted to the left and right wheels (5) via the traveling transmission case (4) and travels by the left and right wheels (5). . Moreover, the motive power from the main transmission case (3) is transmitted to the seedling planting device (10) through the planting transmission case (7), and the seedling planting device (10) plants seedlings in the field. Then, when removing the planting transmission case (7), the seedling planting device (10), the seedling platform (11) and the steering handle (9) for repair or the like, the spare seedling platform (45) is moved to the front frame. (6) It can be removed while remaining on the side. Further, the main transmission case (3), the traveling transmission case (4), the wheels (5), the front frame (6), and the spare seedling stage (45) can be removed as a unit for repair or the like.

また、請求項2に係る発明は、植付伝動ケース(7)を後部フレーム(8)の上面に載置して固定した請求項1に記載の歩行型の苗移植機とした。
従って、この歩行型の苗移植機は、請求項1に係る歩行型の苗移植機の作用に加えて、修理等のために植付伝動ケース(7)を取り外すとき、植付伝動ケース(7)を上方に持ち上げて、後部フレーム(8)及び操縦ハンドル(9)を取り外すことなく、植付伝動ケース(7)を容易に取り外せる。
The invention according to claim 2 is the walking seedling transplanter according to claim 1, wherein the planting transmission case (7) is placed and fixed on the upper surface of the rear frame (8).
Therefore, in addition to the action of the walking-type seedling transplanter according to claim 1, this walking-type seedling transplanter has a planting transmission case (7) when the planting transmission case (7) is removed for repair or the like. ) Is lifted upward, and the planting transmission case (7) can be easily removed without removing the rear frame (8) and the steering handle (9).

請求項1に記載の発明によると、修理等のために植付伝動ケース(7)、苗植付装置(10)、苗載台(11)及び操縦ハンドル(9)を取り外すとき、予備苗載台(45)を前部フレーム(6)側に残したまま取り外すことができ、逆に主伝動ケース(3)、走行伝動ケース(4)、車輪(5)、前部フレーム(6)及び予備苗載台(45)を一体で取り外すこともできるので、取り外し作業が容易に行えて修理や点検が容易になる。   According to invention of Claim 1, when removing a planting transmission case (7), a seedling planting apparatus (10), a seedling mounting stand (11), and a steering handle (9) for repair etc., a preliminary seedling mounting The stand (45) can be removed while remaining on the front frame (6) side. Conversely, the main transmission case (3), the traveling transmission case (4), the wheels (5), the front frame (6) and the spare Since the seedling mount (45) can be removed as a single unit, the removal work can be easily performed, and repair and inspection are facilitated.

また、請求項2に記載の発明によると、請求項1に記載の発明の効果に加えて、植付伝動ケース(7)を取り外して修理するときには、植付伝動ケース(7)を上方に持ち上げて、後部フレーム(8)及び操縦ハンドル(9)を取り外すことなく、植付伝動ケース(7)を容易に取り外すことができ、修理や点検が容易になる。   According to the invention of claim 2, in addition to the effect of the invention of claim 1, when removing the planting transmission case (7) for repair, the planting transmission case (7) is lifted upward. Thus, the planting transmission case (7) can be easily removed without removing the rear frame (8) and the steering handle (9), and repair and inspection are facilitated.

この発明の実施の一形態を、以下に説明する。
図1及び図2は、歩行型田植機(1)の全体側面図及び平面図である。この歩行型田植機(1)は、機体の前端部に設けたエンジン(2)と、該エンジン(2)の後側に設けた主伝動ケース(3)と、該主伝動ケース(3)の左右に各々設けた走行支持部材となる走行伝動ケース(4)と、該走行伝動ケース(4)からの動力で駆動する左右各々の走行体となる車輪(5)と、主伝動ケース(3)の後側面から後方に延びる前部フレーム(6)と、前部フレーム(6)の後端に固着され湾曲して斜め後上方に延びる後部フレーム(8)と、後部フレーム(8)の前端部の上面に載置される植付伝動ケース(7)と、前記後部フレーム(8)の後端に取り付けた操縦ハンドル(9)とを備えている。前記植付伝動ケース(7)の下部には複数(4個)の苗植付装置(10)を取り付け、後部フレーム(8)の前側には該フレーム(8)に左右移動可能に支持される苗載台(11)を設けている。従って、この歩行型田植機(1)は、走行しながら圃場に同時に4条分の苗を植え付ける4条植えの構成となっている。尚、前記エンジン(2)、主伝動ケース(3)、走行伝動ケース(4)及び車輪(5)等により走行部(走行車体)が構成され、植付伝動ケース(7)、苗植付装置(10)及び苗載台(11)等により植付部が構成されている。
One embodiment of the present invention will be described below.
FIG.1 and FIG.2 is the whole side view and top view of walking type rice transplanter (1). This walking type rice transplanter (1) includes an engine (2) provided at the front end of the aircraft, a main transmission case (3) provided on the rear side of the engine (2), and the main transmission case (3). A traveling transmission case (4) as a traveling support member provided on each of the left and right sides, wheels (5) as left and right traveling bodies driven by power from the traveling transmission case (4), and a main transmission case (3) A front frame (6) extending rearward from the rear side surface; a rear frame (8) fixed to the rear end of the front frame (6) and curved and extending obliquely rearward upward; and a front end portion of the rear frame (8) The planting transmission case (7) placed on the upper surface of the rear frame (8), and a steering handle (9) attached to the rear end of the rear frame (8). A plurality of (four) seedling planting devices (10) are attached to the lower portion of the planting transmission case (7), and supported on the front side of the rear frame (8) by the frame (8) so as to be movable left and right. A seedling stand (11) is provided. Therefore, this walking type rice transplanter (1) has a four-row planting structure in which four rows of seedlings are planted simultaneously in the field while running. The engine (2), the main transmission case (3), the traveling transmission case (4), the wheels (5) and the like constitute a traveling section (traveling vehicle body), and a planting transmission case (7) and a seedling planting device. The planting part is constituted by (10), the seedling stage (11) and the like.

前部フレーム(6)の後端に設けた前部フレーム側フランジ(60)と後部フレーム(8)の前端に設けた後部フレーム側フランジ(61)とが接触し、両フランジ(60,61)が固定用のボルト(62)及びナット(63)で互いに固着されて前部フレーム(6)と後部フレーム(8)とが結合して固定された構成となっている。尚、前部フレーム側フランジ(60)と前部フレーム(6)の基部との間には左右2箇所に前部フレーム側リブ(64)が固着されており、前部フレーム側フランジ(60)の強度向上を図っている。また、後部フレーム側フランジ(61)と後部フレーム(8)の基部の上面との間には左右2箇所に後部フレーム側の第一のリブ(65)が固着されており、後部フレーム側フランジ(61)の強度向上を図っている。尚、後部フレーム(8)上には、前記第一のリブ(65)より後側に位置する第二のリブ(66)を左右2箇所に設けている。尚、前部フレーム側フランジ(60)の上端より後部フレーム側フランジ(61)の上端が上側に突出しており、この突出した部分と植付伝動ケース(7)の後述する中央ケース部(7a)の前面との間に固定ボルト(67)を左右に2本設け、植付伝動ケース(7)が移動しないように固定された構成となっている。   The front frame side flange (60) provided at the rear end of the front frame (6) and the rear frame side flange (61) provided at the front end of the rear frame (8) are in contact with each other, and both flanges (60, 61) Are fixed to each other by fixing bolts (62) and nuts (63), and the front frame (6) and the rear frame (8) are coupled and fixed. In addition, between the front frame side flange (60) and the base portion of the front frame (6), front frame side ribs (64) are fixed in two places on the left and right sides, and the front frame side flange (60). The strength is improved. Further, first ribs (65) on the rear frame side are fixed to the left and right two locations between the rear frame side flange (61) and the upper surface of the base of the rear frame (8), and the rear frame side flange ( 61). On the rear frame (8), second ribs (66) located on the rear side of the first rib (65) are provided at two positions on the left and right. In addition, the upper end of the rear frame side flange (61) protrudes upward from the upper end of the front frame side flange (60), and the protruding case and a center case portion (7a) described later of the planting transmission case (7). Two fixing bolts (67) are provided on the left and right sides between the front and rear of the wing, and the planting transmission case (7) is fixed so as not to move.

前記植付伝動ケース(7)は、左右中央に位置する中央ケース部(7a)と、左右両側に位置する外側ケース部(7b)とを備えている。中央ケース部(7a)には後述する左右移動軸(29)や中央2条の苗植付装置(10)へ伝動する伝動機構を備え、外側ケース部(7b)には左右各々の最外条の苗植付装置(10)へ伝動する伝動機構を備えており、植付伝動軸(15)からの動力は中央ケース部(7a)に入力され、該中央ケース部(7a)から外側ケース部(7b)に伝動する構成となっている。中央ケース部(7a)の底面には後部フレーム(8)の上面に合致する凹み部(68)を備え、該凹み部(68)が後部フレーム(8)の上面に接触して後部フレーム(8)上に植付伝動ケース(7)が載置された構成となっている。そして、後部フレーム(8)の前記第一のリブ(65)の後面が中央ケース部(7a)の底部の前面に接触し、前記第二のリブ(66)の前面が中央ケース部(7a)の底部の前面に接触し、植付伝動ケース(7)をしっかりと保持している。   The planting transmission case (7) includes a central case portion (7a) located at the left and right center and outer case portions (7b) located at the left and right sides. The central case part (7a) is provided with a left / right moving shaft (29) to be described later and a transmission mechanism for transmission to the center two seedling planting devices (10), and the outer case part (7b) has left and right outermost lines. The seedling planting device (10) is provided with a transmission mechanism, and the power from the planting transmission shaft (15) is input to the central case portion (7a), from the central case portion (7a) to the outer case portion. (7b) is transmitted. The bottom surface of the central case portion (7a) is provided with a recess (68) that matches the upper surface of the rear frame (8), and the recess (68) contacts the upper surface of the rear frame (8) to contact the rear frame (8). ) The planting transmission case (7) is placed on the top. The rear surface of the first rib (65) of the rear frame (8) is in contact with the front surface of the bottom of the central case portion (7a), and the front surface of the second rib (66) is the central case portion (7a). The planting transmission case (7) is firmly held in contact with the front surface of the bottom of the plant.

また、機体の下部には圃場面に接触する複数(3個)の接地体となるフロート(12)を設けており、機体の走行により該フロート(12)が圃場面を滑走して整地する。フロート(12)のうち、機体の左右中央のセンターフロート(12a)は左右内側の2条の苗植付装置(10)の植付位置を整地し、機体の左右両外側のサイドフロート(12b)は左右外側の各々1条の苗植付装置(10)の植付位置を整地する。センターフロート(12a)は、前端がサイドフロート(12b)の前端より前側に位置し、サイドフロート(12b)より前後長が長く、サイドフロート(12b)より左右幅が広く、サイドフロート(12b)より接地面積が広い。尚、センターフロート(12a)及びサイドフロート(12b)は、側面視で同じ位置に配置された各々の左右方向の回動支点軸(13)回りに上下に回動自在に支持され、前部が圃場面の凹凸に追従して上下動する構成となっている。   Moreover, the float (12) used as the several (3 pieces) grounding body which contacts a farm scene is provided in the lower part of the body, and this float (12) slides on a farm scene and leveling by the driving | running | working of a body. Among the floats (12), the center float (12a) at the center of the left and right sides of the aircraft leveles the planting position of the two seedling planting devices (10) on the left and right inner sides, and the side floats (12b) on the left and right outer sides of the aircraft Levels the planting position of one seedling planting device (10) on each of the left and right outer sides. The center float (12a) has a front end located on the front side of the front end of the side float (12b), is longer in the front / rear length than the side float (12b), is wider in the left / right width than the side float (12b), and is wider than the side float (12b). Wide grounding area. The center float (12a) and the side float (12b) are supported so as to be pivotable up and down around their respective pivotal pivot shafts (13) arranged in the same position in a side view. It is configured to move up and down following the unevenness of the field scene.

エンジン(2)の出力軸は主伝動ケース(3)内に突入しており、エンジン(2)からの動力が主伝動ケース(3)内に伝達される。主伝動ケース(3)内には、車輪(5)、苗植付装置(10)及び苗載台(11)への全ての伝動を断つことができる主クラッチと、該主クラッチからの動力を車輪(5)への伝動経路と苗植付装置(10)及び苗載台(11)への伝動経路とに分岐する動力分岐部と、前記苗植付装置(10)及び苗載台(11)への伝動経路上において該苗植付装置(10)及び苗載台(11)への伝動を断つことができる植付クラッチと、前記車輪(5)への伝動経路上において噛み合うギヤの切替により路上走行用の前進高速状態、植付作業用の前進低速状態、ギヤが噛み合わずに非伝動となる中立状態及び後進状態の4状態に切り替えて変速できる変速部と、該変速部の伝動下手側で左右の車輪(5)への伝動を非伝動状態に切り替えできる左右各々のサイドクラッチとを設けている。従って、前記変速部及びサイドクラッチを介して主伝動ケース(3)から左右に突出する左右各々の走行用伝動軸に伝動される。該走行用伝動軸が走行伝動ケース(4)内に突入しており、走行伝動ケース(4)内でスプロケット及びチェーンにより該走行伝動ケース(4)から左右外側に突出する車軸(14)に伝動し、車輪(5)が駆動回転する。走行伝動ケース(4)は、前端部に位置する前記走行用伝動軸周りに上下に回動可能に設けられ、後端部に位置する車軸(14)を上下に移動させて車輪(5)を上下動させる。また、植付クラッチの伝動により、主伝動ケース(3)から後側に延びる植付伝動軸(15)を介して植付伝動ケース(7)内へ伝動される。   The output shaft of the engine (2) enters the main transmission case (3), and the power from the engine (2) is transmitted into the main transmission case (3). In the main transmission case (3), there is a main clutch that can cut off all transmission to the wheels (5), the seedling planting device (10) and the seedling mount (11), and power from the main clutch. A power branching portion that branches into a transmission path to the wheels (5) and a transmission path to the seedling planting device (10) and the seedling mounting table (11), the seedling planting device (10), and the seedling mounting table (11 ) On the transmission path to the seedling planting device (10) and the seedling mounting stand (11), and a switching of the gear meshing on the transmission path to the wheel (5) Can change gears by switching between a forward high speed state for road traveling, a forward low speed state for planting work, a neutral state where gears do not mesh and become non-transmission, and a reverse state, and a lower transmission of the transmission unit Left and right that can switch the transmission to the left and right wheels (5) to the non-transmission state on the side It is provided and the side clutch. Therefore, it is transmitted to the left and right traveling transmission shafts protruding left and right from the main transmission case (3) via the transmission and the side clutch. The traveling transmission shaft enters the traveling transmission case (4), and is transmitted to the axle (14) projecting outward from the traveling transmission case (4) by the sprocket and chain in the traveling transmission case (4). Then, the wheel (5) is driven to rotate. The traveling transmission case (4) is provided so as to be rotatable up and down around the traveling transmission shaft located at the front end, and the wheel (5) is moved up and down by moving the axle (14) located at the rear end. Move up and down. Further, the planting clutch is transmitted to the planting transmission case (7) through the planting transmission shaft (15) extending rearward from the main transmission case (3).

主伝動ケース(3)の左側の側部には油圧ポンプを固着し、主伝動ケース(3)の後部には油圧バルブユニット(69)を固着し、該油圧バルブユニット(69)の後側に単動式の油圧昇降シリンダ(16)を固着している。この油圧昇降シリンダ(16)は、前後方向に移動する移動部材となるシリンダロッド(17)を後部に備え、前部フレーム(6)の上方に配置される。従って、油圧バルブユニット(69)の切替により油圧ポンプからの油圧を油圧昇降シリンダ(16)へ供給すると、シリンダロッド(17)が後方へ移動する。また、油圧昇降シリンダ(16)内の油圧を油圧タンクとなる主伝動ケース(3)内へ戻す状態に切り替えると、機体の自重によりシリンダロッド(17)が前方へ移動する。従って、油圧昇降シリンダ(16)及びシリンダロッド(17)が、アクチュエータとなる。尚、前部フレーム(6)の前端に設けた主伝動ケース固着用フランジ(70)と前部フレーム(6)の基部との間には左右2箇所に主伝動ケース側リブ(71)が固着されており、前部フレーム側フランジ(70)の強度向上を図っている。また、前記主伝動ケース側リブ(71)は、上方に延設されており、その上端に油圧昇降シリンダ(16)を固着して支持している。従って、機体側面視で、主伝動ケース(3)、油圧バルブユニット(69)、油圧昇降シリンダ(16)、前部フレーム(6)及び主伝動ケース側リブ(71)等により枠型(ループ状)のフレーム構造が形成され、油圧バルブユニット(69)及び油圧昇降シリンダ(16)等の支持強度が向上する。   A hydraulic pump is fixed to the left side portion of the main transmission case (3), a hydraulic valve unit (69) is fixed to the rear portion of the main transmission case (3), and the rear side of the hydraulic valve unit (69) is fixed. A single-acting hydraulic lifting cylinder (16) is secured. The hydraulic elevating cylinder (16) includes a cylinder rod (17) serving as a moving member that moves in the front-rear direction, and is disposed above the front frame (6). Therefore, when the hydraulic pressure from the hydraulic pump is supplied to the hydraulic lift cylinder (16) by switching the hydraulic valve unit (69), the cylinder rod (17) moves backward. Further, when the hydraulic pressure in the hydraulic lifting cylinder (16) is switched back to the state of returning to the main transmission case (3) serving as a hydraulic tank, the cylinder rod (17) moves forward due to the weight of the machine body. Accordingly, the hydraulic elevating cylinder (16) and the cylinder rod (17) serve as actuators. The main transmission case side ribs (71) are fixed to the left and right locations between the main transmission case fixing flange (70) provided at the front end of the front frame (6) and the base of the front frame (6). The strength of the front frame side flange (70) is improved. The main transmission case side rib (71) extends upward, and a hydraulic elevating cylinder (16) is fixedly supported on the upper end of the main transmission case side rib (71). Accordingly, when viewed from the side of the fuselage, the main transmission case (3), the hydraulic valve unit (69), the hydraulic lifting cylinder (16), the front frame (6), the main transmission case side rib (71), etc. ), And the support strength of the hydraulic valve unit (69) and the hydraulic lifting cylinder (16) is improved.

シリンダロッド(17)の後側の端部には後側から切り欠いた左右方向に連通する切り欠き溝(17a)を備え、該切り欠き溝(17a)に左右に延びる中継部材となる中継リンク部材(18)の左右中央部が嵌まるように挿入されている。中継リンク部材(18)は、プレート状の基部(18a)と左右両端で前記基部(18a)から上方に立ち上がる連結部(18b)とを備え、左右対称な形状となっている。シリンダロッド(17)の後側の端部には切り欠き溝(17a)を上下に貫通する連結軸(19)を設け、該連結軸(19)が中継リンク部材(18)の左右中央部に設けた第一の孔(18c)を貫通してシリンダロッド(17)と中継リンク部材(18)とが連結されている。尚、中継リンク部材(18)の左右中央部の前面(18d)と切り欠き溝(17a)の底面(17b)とは、互いに接触する平面となっている。また、第一の孔(18c)は、連結軸(19)の軸径よりも大きい孔径に設定され、前後に長い長孔状に形成されている。   A relay link serving as a relay member that includes a notch groove (17a) that communicates in the left-right direction cut out from the rear side at the rear end of the cylinder rod (17), and that extends to the left and right in the notch groove (17a). The member (18) is inserted so that the left and right center portions thereof are fitted. The relay link member (18) includes a plate-like base (18a) and a connecting portion (18b) that rises upward from the base (18a) at both left and right ends, and has a symmetrical shape. A connecting shaft (19) that vertically penetrates the notch groove (17a) is provided at the rear end of the cylinder rod (17), and the connecting shaft (19) is formed at the center of the left and right of the relay link member (18). The cylinder rod (17) and the relay link member (18) are connected through the provided first hole (18c). In addition, the front surface (18d) of the left-right center part of the relay link member (18) and the bottom surface (17b) of the notch groove (17a) are flat surfaces that are in contact with each other. Moreover, the 1st hole (18c) is set to the hole diameter larger than the shaft diameter of a connection shaft (19), and is formed in the shape of a long hole front and back.

中継リンク部材(18)の連結部(18b)は、前側部分(18b−1)と後側部分(18b−2)とを備え、更に前側部分(18b−1)と後側部分(18b−2)とを機体の左右方向外側の端部で繋ぐ接続部分(18b−3)を備える。前側部分(18b−1)及び後側部分(18b−2)は前後に貫通する第二の孔(18b−4)を備え、該孔(18b−4)に連結ロッド(20)の後部が貫通している。従って、中継リンク部材(18)の左右の連結部(18b)に左右各々の連結ロッド(20)が貫通している。連結ロッド(20)の前端は走行伝動ケース(4)の上側に固着された左右各々のアーム(21)に連結されている。連結ロッド(20)の後端の外周には圧縮ばね(22)を設け、該圧縮ばね(22)の前側に設けた前側ばね受け板(23)が連結部(18b)の後側部分(18b−2)の後面に接触し、圧縮ばね(22)の後側に設けた後側ばね受け板(24)が連結ロッド(20)に移動しないように締め付けられた固定具となる二重ナット(ダブルナット)(25)の前面に接触している。従って、車輪(5)の接地荷重を、走行伝動ケース(4)、アーム(21)、連結ロッド(20)及び圧縮ばね(22)等を介して中継リンク部材(18)が受けている。連結ロッド(20)の中途部には板状の規制具(26)を固着しており、該規制具(26)が連結部(18b)の前側部分(18b−1)の前側に位置している。従って、車輪(5)の接地荷重が極めて小さいとき、圧縮ばね(22)のばね力により規制具(26)が連結部(18b)の前側部分(18b−1)の前面に接触し、車輪(5)が所定以上下動しないように規制している。尚、前側ばね受け板(23)と連結部(18b)の後側部分(18b−2)との互いの接触面及び規制具(26)と連結部(18b)の前側部分(18b−1)との互いの接触面は、平面になっている。また、第二の孔(18b−4)は、連結ロッド(20)の軸径よりも大きい孔径に設定されている。   The connecting portion (18b) of the relay link member (18) includes a front portion (18b-1) and a rear portion (18b-2), and further includes a front portion (18b-1) and a rear portion (18b-2). ) At the end on the outer side in the left-right direction of the fuselage (18b-3). The front part (18b-1) and the rear part (18b-2) have a second hole (18b-4) penetrating in the front-rear direction, and the rear part of the connecting rod (20) penetrates the hole (18b-4). is doing. Therefore, the left and right connecting rods (20) penetrate the left and right connecting portions (18b) of the relay link member (18). The front end of the connecting rod (20) is connected to the left and right arms (21) fixed to the upper side of the traveling transmission case (4). A compression spring (22) is provided on the outer periphery of the rear end of the connecting rod (20), and a front spring receiving plate (23) provided on the front side of the compression spring (22) is connected to the rear portion (18b) of the connecting portion (18b). -2) A double nut (a fixing tool that comes into contact with the rear surface and is tightened so that the rear spring support plate (24) provided on the rear side of the compression spring (22) does not move to the connecting rod (20). Double nut) (25) is in contact with the front surface. Therefore, the relay link member (18) receives the ground load of the wheel (5) via the traveling transmission case (4), the arm (21), the connecting rod (20), the compression spring (22), and the like. A plate-shaped restricting tool (26) is fixed to the middle part of the connecting rod (20), and the restricting tool (26) is located on the front side of the front part (18b-1) of the connecting part (18b). Yes. Therefore, when the ground contact load of the wheel (5) is extremely small, the restricting tool (26) comes into contact with the front surface of the front portion (18b-1) of the connecting portion (18b) by the spring force of the compression spring (22), and the wheel ( 5) is regulated not to move down more than a predetermined amount. It should be noted that the contact surface between the front spring receiving plate (23) and the rear portion (18b-2) of the connecting portion (18b) and the front portion (18b-1) of the restrictor (26) and the connecting portion (18b). The contact surfaces with each other are flat. Moreover, the 2nd hole (18b-4) is set to the hole diameter larger than the axial diameter of a connection rod (20).

従って、油圧ポンプからの油圧を油圧昇降シリンダ(16)内へ供給するべく油圧バルブユニット(69)を切り替えると、シリンダロッド(17)が後方へ移動し、切り欠き溝(17a)の底面(17b)で中継リンク部材(18)の左右中央部の前面(18d)が後側に押されて中継リンク部材(18)が後側へ移動し、該中継リンク部材(18)の左右の連結部(18b)の後側部分(18b−2)が圧縮ばね(22)を介して左右の連結ロッド(20)を後側に引き、左右のアーム(21)を後側に回動させることにより左右の走行伝動ケース(4)が下側に回動し、左右の車輪(5)が下動して圃場に対して機体が上昇する。逆に、油圧昇降シリンダ(16)内の油圧を主伝動ケース(3)内へ戻すべく油圧バルブユニット(69)を切り替えると、左右の車輪(5)の接地荷重により左右のアーム(21)、左右の連結ロッド(20)及び中継リンク部材(18)等を介してシリンダロッド(17)が前方へ戻され、左右の車輪(5)が上動して圃場に対して機体が下降する。   Accordingly, when the hydraulic valve unit (69) is switched to supply the hydraulic pressure from the hydraulic pump into the hydraulic lift cylinder (16), the cylinder rod (17) moves rearward and the bottom surface (17b) of the notch groove (17a). ), The front surface (18d) of the left and right center portion of the relay link member (18) is pushed rearward, so that the relay link member (18) moves rearward, and the right and left connecting portions ( 18b) The rear part (18b-2) pulls the left and right connecting rods (20) to the rear side via the compression spring (22) and rotates the left and right arms (21) to the rear side. The traveling transmission case (4) rotates downward, the left and right wheels (5) move down, and the aircraft rises relative to the field. Conversely, when the hydraulic valve unit (69) is switched to return the hydraulic pressure in the hydraulic lifting cylinder (16) to the main transmission case (3), the left and right arms (21), The cylinder rod (17) is returned to the front via the left and right connecting rods (20) and the relay link member (18), and the left and right wheels (5) are moved upward to lower the aircraft relative to the field.

また、機体の左右傾斜により接地荷重が左右の車輪(5)で所定以上相違すると、切り欠き溝(17a)の底面(17b)の左右一方の端を支点に中継リンク部材(18)が前後に回動して左右の連結部(18b)が互いに前後反対側に移動し、接地荷重が大きい側の車輪(5)が下動し反対側の車輪(5)が上動し、左右水平姿勢となるよう機体の左右傾斜姿勢が修正される。このとき、連結軸(19)により、中継リンク部材(18)がシリンダロッド(17)の切り欠き溝(17a)から脱落するようなことを防止している。左右の連結ロッド(20)ひいては左右の連結部(18b)の間の左右中央位置に対して切り欠き溝(17a)の底面(17b)の左右端は左右に偏位しているので、左右の車輪(5)の接地荷重の相違が小さいときには、中継リンク部材(18)が前後に回動せずに中継リンク部材(18)の接触面となる前面(18d)と切り欠き溝(17a)の底面(17b)とが接触した状態が維持され、左右の車輪(5)が相対的に上下動せず、左右の車輪(5)が個別に無闇に上下動することによりかえって機体の左右傾斜姿勢が不安定になるようなことを防止している。また、切り欠き溝(17a)の底面(17b)の左右端が左右に偏位しているので、中継リンク部材(18)が前後に回動しても、圧縮ばね(22)や車輪(5)からの荷重により中継リンク部材(18)が中継リンク部材(18)の前面(18d)と切り欠き溝(17a)の底面(17b)とが接触する基準の回動位置に戻りやすく、機体の姿勢を安定させることができる。更に、接触面となる切り欠き溝(17a)の底面(17b)、中継リンク部材(18)の左右中央部の前面(18d)、前側ばね受け板(23)の前面、連結部(18b)の後側部分(18b−2)の後面、規制具(26)の後面及び連結部(18b)の前側部分(18b−1)の前面は平面となっているので、中継リンク部材(18)が回動して中継リンク部材(18)の左右中央部の前面(18d)、連結部(18b)の後側部分(18b−2)の後面及び連結部(18b)の前側部分(18b−1)の前面の角度が変化しようとするのを圧縮ばね(22)の付勢力により抑えることができ、機体の左右傾斜が圃場の左右傾斜に近づくように促し、機体の左右傾斜姿勢が不安定になるようなことを防止している。また、連結ロッド(20)の規制具(26)により、前進側に回転する車輪(5)の駆動反力で該車輪(5)が下動して機体の対地高さや左右傾斜姿勢が不適正になるのを防止している。   Also, if the grounding load is different from the left and right wheels (5) by a predetermined amount due to the left and right inclination of the fuselage, the relay link member (18) is moved back and forth with the left and right ends of the bottom surface (17b) of the notch groove (17a) as a fulcrum. The left and right connecting parts (18b) are moved to the opposite sides in the forward and backward direction, the wheel (5) with the larger ground load is moved down, and the wheel (5) on the opposite side is moved up. The left and right tilting posture of the aircraft is corrected. At this time, the connecting shaft (19) prevents the relay link member (18) from dropping from the notch groove (17a) of the cylinder rod (17). Since the left and right ends of the bottom surface (17b) of the notch groove (17a) are offset to the left and right with respect to the left and right connecting rods (20), and hence the left and right central positions between the left and right connecting portions (18b), When the difference in grounding load between the wheels (5) is small, the relay link member (18) does not rotate back and forth, and the front surface (18d) that becomes the contact surface of the relay link member (18) and the notch groove (17a) The state in which the bottom surface (17b) is in contact is maintained, the left and right wheels (5) do not move up and down relatively, and the left and right wheels (5) move up and down individually and darkly. Is preventing instability. Further, since the left and right ends of the bottom surface (17b) of the notch groove (17a) are deviated left and right, even if the relay link member (18) rotates back and forth, the compression spring (22) and the wheel (5 ), The relay link member (18) can easily return to the reference rotation position where the front surface (18d) of the relay link member (18) and the bottom surface (17b) of the notch groove (17a) contact each other. The posture can be stabilized. Furthermore, the bottom surface (17b) of the notch groove (17a) to be the contact surface, the front surface (18d) of the central portion of the relay link member (18), the front surface of the front spring support plate (23), the connection portion (18b) Since the rear surface of the rear portion (18b-2), the rear surface of the restrictor (26), and the front surface of the front portion (18b-1) of the connecting portion (18b) are flat, the relay link member (18) is rotated. The front link (18d) of the right and left central part of the relay link member (18), the rear surface of the rear part (18b-2) of the connecting part (18b), and the front part (18b-1) of the connecting part (18b) The urging force of the compression spring (22) can suppress the change in the angle of the front surface, and the left and right inclination of the machine body is urged to approach the left and right inclination of the field so that the left and right inclination posture of the machine body becomes unstable. To prevent things from happening. Further, the restricting tool (26) of the connecting rod (20) causes the wheel (5) to move down due to the driving reaction force of the wheel (5) that rotates forward, and the ground height and the right / left inclined posture of the aircraft are inappropriate. Is prevented.

尚、二重ナット(25)を弛めて連結ロッド(20)における二重ナット(25)の位置を調節することにより、機体の左右傾斜姿勢を調節することができる。この調節は、左右一方の二重ナット(25)の位置を調節しても、左右両方の二重ナット(25)の位置を調節しても良い。この二重ナット(25)からなる調節部分は機体平面視でボンネットカバー(43)の外側に位置しているので、作業者はボンネットカバー(43)が邪魔にならずに上側から二重ナット(25)の位置調節を容易に行える。   In addition, the right-and-left inclination posture of the airframe can be adjusted by loosening the double nut (25) and adjusting the position of the double nut (25) in the connecting rod (20). This adjustment may be performed by adjusting the position of one of the left and right double nuts (25) or by adjusting the position of both the left and right double nuts (25). Since the adjustment portion composed of the double nut (25) is located outside the bonnet cover (43) in plan view of the machine body, the operator can avoid the bonnet cover (43) from interfering with the double nut ( 25) can be easily adjusted.

苗植付装置(10)及び苗載台(11)は、植付伝動ケース(7)からの動力で作動する。苗載台(11)は、植付伝動ケース(7)の左右に突出して左右移動する左右移動軸(29)の左右両端から左右各々の連結部材(30)を介して支持され、苗受板(27)に沿って左右往復移動し、苗受板(27)に設けた各条の苗取口(28)に一株分ずつ苗を供給する。尚、苗載台(11)の上部には左右移動用レール(34)を固着して設けており、該左右移動用レール(34)が後部フレーム(8)の上部から支持される支持ローラ(33)に案内されて左右移動可能に支持されている。従って、苗載台(11)は、下部で苗受板(27)に左右移動可能に支持され、上部で支持ローラ(33)に左右移動可能に支持され、植付伝動ケース(7)からの動力で左右移動軸(29)を介して左右に往復移動する構成となっている。また、苗載台(11)には、左右移動端で苗取口(28)側(下側)に苗を移送する各条の苗送りベルト(35)を備えている。この苗送りベルト(35)は、植付伝動ケース(7)からの動力で作動し、苗載台(11)の左右移動端でマット苗を一株分移送して苗を苗取口(28)へ供給する。   The seedling planting device (10) and the seedling mount (11) are operated by power from the planting transmission case (7). The seedling mount (11) is supported from both left and right ends of a left and right moving shaft (29) protruding left and right of the planting transmission case (7) via left and right connecting members (30). It moves back and forth along (27) and supplies seedlings one by one to the seedling inlet (28) of each strip provided on the seedling receiving plate (27). A left / right moving rail (34) is fixedly provided on the upper part of the seedling stage (11), and the left / right moving rail (34) is supported from the upper part of the rear frame (8). 33) and supported so as to be movable left and right. Accordingly, the seedling stage (11) is supported by the seedling receiving plate (27) so as to be movable left and right at the lower part and supported by the support roller (33) so as to be movable left and right at the upper part. It is configured to reciprocate to the left and right via the left and right moving shaft (29) by power. In addition, the seedling stage (11) is provided with a seedling feeding belt (35) for each strip for transferring seedlings to the seedling outlet (28) side (lower side) at the left and right moving ends. The seedling feeding belt (35) is operated by the power from the planting transmission case (7), transfers one mat seedling at the left and right moving ends of the seedling mounting base (11), and transfers the seedling to the seedling outlet (28 ).

苗植付装置(10)は、植付伝動ケース(7)の下部に取り付けられ、該植付伝動ケース(7)からの動力で作動するクランク式であり、分離爪(31)が苗取口(28)上の苗を掻き取り、掻き取った苗を押出具(32)が圃場面に向かって押し出して圃場に苗を植え付ける。   The seedling planting device (10) is a crank type that is attached to the lower portion of the planting transmission case (7) and is operated by power from the planting transmission case (7), and the separation claw (31) is a seedling outlet. (28) The upper seedling is scraped off and the scraped seedling is pushed out by the pushing tool (32) toward the field scene to plant the seedling in the field.

操縦ハンドル(9)の前側で且つ苗載台(11)の後側には、車輪(5)、苗植付装置(10)及び苗載台(11)への伝動を断つことができる主クラッチレバー(36)と、苗植付装置(10)及び苗載台(11)への伝動を断ったり油圧昇降シリンダ(16)を作動させるべく油圧バルブユニットの油路を切り替えたりする植付昇降レバー(37)とを設けている。前記主クラッチレバー(36)は、入位置と切位置との2つの操作位置に操作できる構成となっており、主伝動ケース(3)内の主クラッチを操作して伝動状態と非伝動状態とに切り替える。前記植付昇降レバー(37)は、植付位置、下降位置、中立位置及び上昇位置の4つの操作位置に操作できる構成となっており、主伝動ケース(3)内の植付クラッチを操作して植付伝動軸(15)を駆動状態と非駆動状態とに切り替えると共に、油圧昇降シリンダ(16)を作動させて左右の車輪(5)を上下動させる。すなわち、前記植付位置に操作すると、植付クラッチを伝動状態にして苗植付装置(10)及び苗載台(11)を作動させると共に、機体の自重で左右の車輪(5)が接地荷重を受けることにより油圧昇降シリンダ(16)内の油圧を主伝動ケース(3)内に戻して左右の車輪(5)を上動させ、機体を下降させてフロート(12)が接地状態となる。前記下降位置に操作すると、上述のように機体を下降させた状態で、植付クラッチを非伝動状態にして苗植付装置(10)及び苗載台(11)の作動を停止させる。前記中立位置に操作すると、上述のように苗植付装置(10)及び苗載台(11)の作動を停止させた状態で、油圧昇降シリンダ(16)への油路を遮断して油圧昇降シリンダ(16)の作動を固定し、左右の車輪(5)を任意の上下位置で固定して機体の昇降を停止させる。前記上昇位置に操作すると、上述のように苗植付装置(10)及び苗載台(11)の作動を停止させた状態で、油圧昇降シリンダ(16)内へ油圧を供給して左右の車輪(5)を下動させ、機体を上昇させてフロート(12)が非接地状態となる。また、センターフロート(12a)の上下動で該センターフロート(12a)の前部に連結されるロッドを介して油圧バルブユニットの油路を切り替える構成となっており、センターフロート(12a)の前部が上動すると油圧昇降シリンダ(16)内へ油圧を供給して左右の車輪(5)を下動させる構成となっている。従って、植付昇降レバー(37)が前記植付位置及び下降位置のとき、センターフロート(12a)が圃場面に接地して上下動することにより該センターフロート(12a)が所望の前後姿勢になるよう左右の車輪(5)が上下動し、機体が所定の対地高さとなるよう昇降制御される構成となっている。   A main clutch that can cut off transmission to the wheel (5), the seedling planting device (10), and the seedling stage (11) on the front side of the steering handle (9) and on the rear side of the seedling stage (11). Lever (36), planting lifting lever for switching the oil passage of the hydraulic valve unit to cut off transmission to the seedling planting device (10) and seedling mounting base (11) and to operate the hydraulic lifting cylinder (16) (37). The main clutch lever (36) is configured to be operated in two operation positions, an on position and a disengagement position. The main clutch lever (36) is operated by operating the main clutch in the main transmission case (3) to be in a transmission state and a non-transmission state. Switch to. The planting lifting / lowering lever (37) is configured to be operated in four operation positions including a planting position, a lowered position, a neutral position, and a raised position, and operates a planting clutch in the main transmission case (3). Then, the planting transmission shaft (15) is switched between a driving state and a non-driving state, and the hydraulic lifting cylinder (16) is operated to move the left and right wheels (5) up and down. That is, when operated to the planting position, the planting clutch (10) and the planting platform (11) are operated with the planting clutch in the transmission state, and the left and right wheels (5) are brought into contact with the ground due to their own weight. As a result, the hydraulic pressure in the hydraulic lift cylinder (16) is returned to the main transmission case (3), the left and right wheels (5) are moved up, the aircraft is lowered, and the float (12) is brought into a grounded state. When operated to the lowered position, the planting clutch is brought into a non-transmission state in a state where the machine body is lowered as described above, and the operations of the seedling planting device (10) and the seedling placing stand (11) are stopped. When operated to the neutral position, the hydraulic passage is closed by shutting off the oil passage to the hydraulic lifting cylinder (16) with the operation of the seedling planting device (10) and the seedling mounting stand (11) stopped as described above. The operation of the cylinder (16) is fixed, and the left and right wheels (5) are fixed at an arbitrary vertical position to stop the elevation of the aircraft. When operated to the raised position, hydraulic pressure is supplied into the hydraulic lifting cylinder (16) with the operation of the seedling planting device (10) and the seedling mounting stand (11) stopped as described above, and the left and right wheels (5) is moved downward to raise the fuselage, and the float (12) is in a non-grounded state. Moreover, it is the structure which switches the oil path of a hydraulic valve unit via the rod connected with the front part of this center float (12a) by the vertical motion of a center float (12a), and the front part of a center float (12a) When the motor moves upward, the hydraulic pressure is supplied into the hydraulic lifting cylinder (16) to move the left and right wheels (5) downward. Therefore, when the planting lift lever (37) is in the planting position and the lowered position, the center float (12a) contacts the field scene and moves up and down to bring the center float (12a) into a desired front and back posture. The left and right wheels (5) move up and down so that the aircraft is controlled to rise and fall to a predetermined ground height.

具体構成について説明すると、油圧バルブユニット(69)内の油圧バルブは、ロータリー式のバルブであり、左右方向のスプール軸(72)を回動させることにより、油路を切り替える構成となっている。前記スプール軸(72)と一体で回動する油圧操作アーム(73)を油圧バルブユニット(69)の右側に設けており、該油圧操作アーム(69)を図6視で右回りに回動させるにつれて上昇状態、中立状態及び下降状態に油路が切り替わる。この油圧操作アーム(73)に植付昇降レバー(37)からの昇降操作ワイヤ(74)を連結しており、植付昇降レバー(37)を操作すると昇降操作ワイヤ(74)を介して油圧操作アーム(73)が回動操作される構成となっている。油圧操作アーム(74)の右側にはスプール軸回りに回動自在なフロート上下アーム(75)を設けており、該フロート上下動アーム(75)の後端部とセンターフロート(12a)の前部とをフロート上下動ロッド(76)で連結している。一方、油圧操作アーム(73)の前端部は、右側に屈曲してフロート上下動アーム(75)の前端部の下方に位置している。従って、油圧操作アーム(73)の回動位置に拘らず、センターフロート(12a)の前部が上動すると、フロート上下動ロッド(76)を介してフロート上下動アーム(75)が図6視で左回りに回動し、該フロート上下動アーム(75)の前端部が油圧操作アーム(73)の前端部を押し下げ、該油圧操作アーム(73)を図6視で左回りに回動させて上昇状態に切り替える構成となっている。また、植付昇降レバー(37)が植付位置又は下降位置のとき、センターフロート(12a)の前部が下動すると、フロート上下動ロッド(76)を介してフロート上下動アーム(75)が図6視で右回りに回動して該フロート上下動アーム(75)の前端部が上動するので、該フロート上下動アーム(75)の前端部に接触して押し下げられていた油圧操作アーム(73)の前端部も上動し、該油圧操作アーム(73)を図6視で右回りに回動させて下降状態に切り替える構成となっている。尚、油圧操作アーム(73)は、スプリング(77)により、図6視で右回り(下降状態側)に回動する方向に引っ張られている。尚、油圧操作アーム(73)は、植付昇降レバー(37)を上昇位置に操作しているとき、昇降操作ワイヤ(74)に規制されているので、中立状態及び下降状態に回動できないようになっている。同様に、油圧操作アーム(73)は、植付昇降レバー(37)を中立位置に操作しているとき、昇降操作ワイヤ(74)に規制されているので、下降状態に回動できないようになっている。   The specific configuration will be described. The hydraulic valve in the hydraulic valve unit (69) is a rotary type valve, and is configured to switch the oil passage by rotating the spool shaft (72) in the left-right direction. A hydraulic operation arm (73) that rotates integrally with the spool shaft (72) is provided on the right side of the hydraulic valve unit (69), and the hydraulic operation arm (69) is rotated clockwise in FIG. As the oil passage changes, the oil passage changes to an ascending state, a neutral state, and a descending state. A lifting / lowering operation wire (74) from the planting lifting / lowering lever (37) is connected to the hydraulic operation arm (73), and when the planting lifting / lowering lever (37) is operated, hydraulic operation is performed via the lifting / lowering operating wire (74). The arm (73) is configured to be rotated. On the right side of the hydraulic operation arm (74), there is provided a float vertical arm (75) that is rotatable around the spool shaft. The rear end of the float vertical movement arm (75) and the front of the center float (12a) Are connected by a float vertical movement rod (76). On the other hand, the front end portion of the hydraulic operation arm (73) is bent to the right and is positioned below the front end portion of the float vertical movement arm (75). Therefore, regardless of the rotational position of the hydraulic operation arm (73), when the front part of the center float (12a) moves upward, the float vertical movement arm (75) is viewed through the float vertical movement rod (76) as shown in FIG. , And the front end of the float vertical movement arm (75) pushes down the front end of the hydraulic operation arm (73), and the hydraulic operation arm (73) is rotated counterclockwise in FIG. It is configured to switch to the rising state. Further, when the planting lift lever (37) is in the planting position or the lowered position, if the front part of the center float (12a) moves downward, the float vertical movement arm (75) is moved via the float vertical movement rod (76). Since the front end of the float vertical movement arm (75) is moved upward in the clockwise direction as viewed in FIG. 6, the hydraulic operation arm that has been pushed down in contact with the front end of the float vertical movement arm (75) The front end of (73) is also moved upward, and the hydraulic operation arm (73) is rotated clockwise as viewed in FIG. The hydraulic operation arm (73) is pulled by the spring (77) in a direction to rotate clockwise (downward side) as viewed in FIG. The hydraulic operation arm (73) is restricted by the lifting / lowering operation wire (74) when the planting lifting / lowering lever (37) is operated to the raised position, so that it cannot rotate to the neutral state or the lowered state. It has become. Similarly, since the hydraulic operation arm (73) is restricted by the lifting / lowering operation wire (74) when the planting lifting / lowering lever (37) is operated to the neutral position, the hydraulic operation arm (73) cannot rotate to the lowered state. ing.

油圧操作アーム(73)の上端部には、自動復帰用ロッド(78)を連結している。尚、前記スプリング(77)の端部は、前記自動復帰用ロッド(78)に引っ掛けられている。自動復帰用ロッド(78)の他端は、シリンダロッド(17)と共に前後に移動するカラー(79)に固着した移動体(移動プレート)(80)を貫通して後方にまで延び、二重のナット(81)による引っ掛け部分を形成している。従って、油圧操作アーム(73)が上昇状態に回動してシリンダロッド(17)が後側に移動し、移動体(80)に前記二重のナット(81)が引っ掛かって自動復帰用ロッド(78)が後方に引かれると、油圧操作アーム(73)が強制的に中立状態に回動させられ、シリンダロッド(17)の移動が停止して機体の上昇作動が停止する構成となっている。つまり、シリンダロッド(17)が移動ストロークにおける後側の移動端まで移動すると、自動的に油路を中立状態に切り替え、油圧ポンプの駆動負荷が増大するのを防止している。尚、自動復帰用ロッド(78)は、通常の状態では中継リンク部材(18)の上方に位置している。   An automatic return rod (78) is connected to the upper end of the hydraulic operation arm (73). The end of the spring (77) is hooked on the automatic return rod (78). The other end of the automatic return rod (78) extends rearward through a moving body (moving plate) (80) fixed to a collar (79) moving back and forth together with the cylinder rod (17). A hook portion is formed by the nut (81). Accordingly, the hydraulic operation arm (73) is turned upward to move the cylinder rod (17) to the rear side, and the double nut (81) is hooked on the moving body (80), so that the automatic return rod ( When 78) is pulled rearward, the hydraulic operation arm (73) is forcibly rotated to the neutral state, and the movement of the cylinder rod (17) is stopped and the ascending operation of the airframe is stopped. . That is, when the cylinder rod (17) moves to the rear moving end in the moving stroke, the oil passage is automatically switched to the neutral state to prevent an increase in the driving load of the hydraulic pump. The automatic return rod (78) is positioned above the relay link member (18) in a normal state.

よって、自動復帰用ロッド(78)により、シリンダロッド(17)の位置に対する油圧操作アーム(73)の作動タイミングが安定し、油圧操作アーム(73)の中立状態への自動復帰タイミングの作動精度が向上する。また、修理等のために油圧装置を着脱するとき、主伝動ケース(3)と油圧バルブユニットの結合を外し、主伝動ケース側リブ(71)と油圧昇降シリンダ(16)との結合を外し、フロート上下動アーム(75)、フロート上下動ロッド(76)との連結を外し、連結軸(19)を外せば、油圧バルブユニット(69)、油圧昇降シリンダ(16)、シリンダロッド(17)、油圧操作アーム(73)、フロート上下動アーム(75)、自動復帰用ロッド(78)、カラー(79)からなる油圧装置の主要部を一体で機体から取り外すことができ、調整等の修理を容易に行える。修理として、例えば、自動復帰用ロッド(78)の二重のナット(81)の位置を変えて、自動復帰の作動タイミングを調整すること等が考えられる。尚、スプリング(77)と昇降操作ワイヤ(74)のアウターの基部は油圧昇降シリンダ(16)に固着される取付部材に取り付けられているので、スプリング(77)や昇降操作ワイヤ(74)を取り外すことなく油圧装置の主要部を着脱できる。   Therefore, the operation timing of the hydraulic operation arm (73) relative to the position of the cylinder rod (17) is stabilized by the automatic return rod (78), and the operation accuracy of the automatic return timing to the neutral state of the hydraulic operation arm (73) is improved. improves. When the hydraulic device is attached or detached for repair or the like, the main transmission case (3) is disconnected from the hydraulic valve unit, and the main transmission case side rib (71) is disconnected from the hydraulic lifting cylinder (16). By disconnecting the float vertical movement arm (75) and the float vertical movement rod (76) and removing the connection shaft (19), the hydraulic valve unit (69), hydraulic lifting cylinder (16), cylinder rod (17), The main parts of the hydraulic system consisting of the hydraulic operation arm (73), float up / down movement arm (75), automatic return rod (78), collar (79) can be removed from the machine as a whole, making adjustments and repairs easy. Can be done. As the repair, for example, the position of the double nut (81) of the automatic return rod (78) may be changed to adjust the operation timing of the automatic return. Since the outer base of the spring (77) and the lifting / lowering operation wire (74) is attached to an attachment member fixed to the hydraulic lifting / lowering cylinder (16), the spring (77) and the lifting / lowering operation wire (74) are removed. The main part of the hydraulic device can be attached and detached without any trouble.

従来は、特開昭62−201512号公報に示すように、自動復帰用ロッドを苗植付部を昇降させる昇降リンク機構に連結していたので、自動復帰用ロッドを周辺部材ごと取り外して調整することができず、修理や点検が困難である。   Conventionally, as shown in Japanese Patent Application Laid-Open No. 62-201512, the automatic return rod is connected to a lifting link mechanism that lifts and lowers the seedling planting portion. It is difficult to repair and check.

操縦ハンドル(9)及び苗載台(11)の前側には、主伝動ケース(3)内の変速部を操作するための変速レバー(38)と、エンジン(2)を始動するためのリコイルノブ(39)とを設けている。尚、機体の前端部にあるエンジン(2)とリコイルノブ(39)とは、リコイルロープ(40)により連結されている。操縦ハンドル(9)の左右のハンドルグリップ(9a)の下方には左右各々のサイドクラッチレバー(41)を設けており、該サイドクラッチレバー(41)により主伝動ケース(3)内の左右各々のサイドクラッチを操作する構成となっている。操縦ハンドル(9)の斜め前下側で後部フレーム(8)の左側には植付深さ調節レバー(42)を設けており、該植付深さ調節レバー(42)の操作により該レバー(42)と一体回動する左右方向の植付深さ調節軸(53)を回動し、植付深さ調節軸(53)と一体回動する各々の植付深さ調節アーム(54)を介して各フロート(12)の回動支点軸(13)の機体に対する上下位置を変更して、苗植付装置(10)による苗の植付深さを変更して調節できる構成となっている。操縦ハンドル(9)の斜め前下側で後部フレーム(8)の右側には苗取量調節レバー(65)を設けており、該苗取量調節レバー(65)の操作により苗受板(27)の苗植付装置(10)に対する上下位置を変更して、苗植付装置(10)による一株当たりの苗取り量を変更して調節できる構成となっている。   On the front side of the steering handle (9) and the seedling platform (11), there are a transmission lever (38) for operating the transmission section in the main transmission case (3), and a recoil knob (for starting the engine (2)) ( 39). The engine (2) and the recoil knob (39) at the front end of the machine body are connected by a recoil rope (40). The left and right side clutch levers (41) are provided below the left and right handle grips (9a) of the steering handle (9), and the left and right side clutch levers (41) are provided in the main transmission case (3). The side clutch is operated. A planting depth adjusting lever (42) is provided on the left side of the rear frame (8) on the diagonally lower front side of the steering handle (9), and the lever (42) is operated by operating the planting depth adjusting lever (42). 42) the planting depth adjusting shaft (53) in the left-right direction rotating integrally with the planting depth adjusting shaft (53), and each planting depth adjusting arm (54) rotating together with the planting depth adjusting shaft (53). By changing the vertical position of the rotation fulcrum shaft (13) of each float (12) with respect to the machine body, the planting depth of the seedlings by the seedling planting device (10) can be changed and adjusted. . A seedling collection amount adjusting lever (65) is provided on the right side of the rear frame (8) on the diagonally front lower side of the steering handle (9), and the seedling receiving plate (27) is operated by operating the seedling collection amount adjusting lever (65). ) To the seedling planting device (10) is changed, and the amount of seedlings per strain by the seedling planting device (10) can be changed and adjusted.

エンジン(2)及び主伝動ケース(3)の上方には、ボンネットカバー(43)を設けている。また、エンジン(2)の上方には、燃料タンク(44)を設けている。
ボンネットカバー(43)の後部の上方から植付伝動ケース(7)の前部の上方にわたる位置には、予備の苗を載せる予備苗載台(45)を設けている。この予備苗載台(45)は、棒材を組み合わせた枠体で構成され、前部フレーム(6)から上方に延びる予備苗載台支持フレーム(46)に支持されている。予備苗載台(45)の前後左右の四方には立ち上がり部(47、48)を設けており、該立ち上がり部(47、48)により搭載した苗が脱落しないようにしている。予備苗載台(45)は、長手方向約60cm、短手方向約30cmのマット苗を4枚載置できるように、前後幅が約60cmで左右幅が約120cmの広さになっている。従って、予備苗載台(45)は、長手方向を前後方向に向けたマット苗を左右に4枚配列して載置できる。また、苗運搬を容易にするためにマット苗を巻いた巻苗(r)の状態で苗を取り扱うことがあるが、この巻苗(r)を予備苗載台(45)に載置することもできる。このとき、前方の立ち上がり部(47)が他の三方(右方、左方、後方)の立ち上がり部(48)より高く設定されており、予備苗載台(45)に載置した巻苗(r)が転びながら前方に飛び出して脱落しにくいようにしている。これにより、この歩行型田植機(1)は機体の重心が車輪(5)の接地位置より前側に位置するために機体の前後傾斜姿勢が前下がり姿勢になりやすいが、機体が前下がり姿勢になっても巻苗(r)が脱落しにくくなり、植付作業を円滑に行える。特に、機体を上昇させての機体旋回時には機体が大きく前下がり姿勢に変化するが、この機体旋回時の巻苗(r)の脱落を的確に防止できる。尚、前方の立ち上がり部(47)の高さ(H)は、予備苗載台(45)の前後幅(L)を2πで除した値以上に設定されている。従って、前方の立ち上がり部(47)の高さ(H)が巻苗(r)の重心と同一か又は高くなるので、巻苗(r)が前方に脱落しにくくなる。
A bonnet cover (43) is provided above the engine (2) and the main transmission case (3). A fuel tank (44) is provided above the engine (2).
A preliminary seedling stage (45) on which a preliminary seedling is placed is provided at a position extending from above the rear part of the bonnet cover (43) to above the front part of the planting transmission case (7). The preliminary seedling stage (45) is composed of a frame made of a combination of bars, and is supported by a preliminary seedling stage support frame (46) extending upward from the front frame (6). Rising parts (47, 48) are provided on the front, rear, left, and right sides of the preliminary seedling stage (45) so that the seedlings mounted by the rising parts (47, 48) do not fall off. The preliminary seedling stage (45) has a width of about 60 cm in front and rear and a width of about 120 cm in width so that four mat seedlings with a length of about 60 cm and a width of about 30 cm can be placed. Therefore, the preliminary seedling mounting table (45) can be mounted by arranging four mat seedlings with the longitudinal direction in the front-rear direction. In order to facilitate the transportation of seedlings, seedlings may be handled in the form of rolled seedlings (r) wound with matted seedlings, and these rolled seedlings (r) should be placed on the spare seedling stage (45). You can also. At this time, the front rising part (47) is set higher than the other three (right, left, rear) rising parts (48), and the rolled seedlings ( As r) falls, it jumps forward to prevent it from falling off. As a result, the walking type rice transplanter (1) has the center of gravity of the fuselage located in front of the ground contact position of the wheel (5), so the front and rear tilt posture of the fuselage is likely to be in the forwardly lowered posture, but the aircraft is in the forwardly lowered posture. Even if it becomes, the seedling (r) becomes difficult to fall off and the planting work can be performed smoothly. In particular, when the airframe is turned with the airframe raised, the airframe largely changes to a forwardly lowered posture, but the winding seedling (r) can be accurately prevented from falling off during the airframe turning. The height (H) of the front rising portion (47) is set to a value equal to or greater than the value obtained by dividing the front-rear width (L) of the preliminary seedling stage (45) by 2π. Therefore, since the height (H) of the front rising portion (47) is the same as or higher than the center of gravity of the rolled seedling (r), the rolled seedling (r) is less likely to fall forward.

前記予備苗載台支持フレーム(46)は、ボンネットカバー(43)と植付伝動ケース(7)(植付部)との間に配置されている。前部フレーム(6)で予備苗載台支持フレーム(46)を固定する固定部材(49)には、ボンネットカバー(43)の後部を支持するべく斜め前上方に延びるボンネットカバー支持部材(50)を固着している。これにより、ボンネットカバー支持部材(50)の支持強度が向上し、ボンネットカバー(43)を確実にしっかりと支持できる。尚、ボンネットカバー支持部材(50)を前記固定部材(49)を介さずに前部フレーム(6)から支持する構成としても、ボンネットカバー支持部材(50)を固定部材(49)の近くで支持する構成とすれば、ボンネットカバー支持部材(50)の支持強度を向上させることができる。また、ボンネットカバー支持部材(50)を予備苗載台支持フレーム(46)から支持する構成とすれば、ボンネットカバー支持部材(50)の支持強度を向上させながら、ボンネットカバー支持部材(50)を短縮化できてコンパクトにでき、軽量化及びコストダウンが図れる。   The preliminary seedling support frame (46) is disposed between the bonnet cover (43) and the planting transmission case (7) (planting section). A bonnet cover support member (50) extending diagonally forward and upward to support the rear portion of the bonnet cover (43) is provided on the fixing member (49) for fixing the preliminary seedling support frame (46) with the front frame (6). Is fixed. Thereby, the support intensity | strength of a bonnet cover support member (50) improves, and a bonnet cover (43) can be supported firmly reliably. Even if the bonnet cover support member (50) is supported from the front frame (6) without the fixing member (49), the bonnet cover support member (50) is supported near the fixing member (49). If it is set as the structure to perform, the support strength of a bonnet cover support member (50) can be improved. Further, if the bonnet cover support member (50) is supported from the preliminary seedling support base frame (46), the bonnet cover support member (50) is improved while improving the support strength of the bonnet cover support member (50). It can be shortened and made compact, reducing the weight and cost.

機体の前部には、機体の前方の障害物からエンジン(2)、主伝動ケース(3)及びボンネットカバー(43)等を防護する防護フレーム(51)を設けている。この防護フレーム(51)は、主伝動ケース(3)の左右側面から左右外側に延びる左右各々の取付部(51a)と、この左右の取付部(51a)を連結する機体外縁となる防護部(51b)とを備えている。該防護部(51b)は、左右中央部分が左右に真直に延びる水平状で最も前側に位置し、左右外側部分が左右外側へいくにつれて後側に位置する構成となっている。また、防護部(51b)は、左右中央部分が最も上側に位置し、左右外側部分が左右外側へいくにつれて下側に偏位する構成となっている。防護部(51b)の左右端部には長孔を介してサイドフロート(12b)の前端を連結し、サイドフロート(12b)の上下回動範囲を規制している。これにより、サイドフロート(12b)の支持部材を防護フレーム(51)で兼用することができ、機体の軽量化及びコストダウンが図れる。同様に、センターフロート(12a)は、その前端が長孔を介して主伝動ケース(3)に連結され、上下回動範囲が規制されている。   A protective frame (51) for protecting the engine (2), the main transmission case (3), the bonnet cover (43) and the like from obstacles ahead of the aircraft is provided at the front of the aircraft. The protective frame (51) includes left and right mounting portions (51a) extending from the left and right side surfaces of the main transmission case (3) to the left and right outer sides, and a protective portion (ie, a body outer edge connecting the left and right mounting portions (51a)). 51b). The protection part (51b) is configured such that the left and right center part extends in the horizontal direction and is located at the most front side, and the left and right outside parts are located at the rear side as it goes to the left and right sides. Moreover, the protection part (51b) has a configuration in which the left and right central part is located on the uppermost side, and the left and right outer parts are shifted downward as the left and right outer parts go to the left and right. The front end of the side float (12b) is connected to the left and right end portions of the protection portion (51b) through a long hole to restrict the vertical rotation range of the side float (12b). Thereby, the support member of the side float (12b) can be used also by the protective frame (51), and the weight reduction and cost reduction of an airframe can be achieved. Similarly, the front end of the center float (12a) is connected to the main transmission case (3) through a long hole, and the vertical rotation range is restricted.

機体をトラックの荷台に積み込んで固定するときには、前記防護部(51b)の左右中央部分の左右両端に各々ロープを掛けると共に、後部フレーム(8)の上部に固着したフック(52)にロープを掛け、機体の3箇所を固定して荷台にしっかりと固定するようになっている。   When loading and fixing the airframe on the truck bed, the ropes are hung on the left and right ends of the left and right central parts of the protective part (51b), and the ropes are hung on the hooks (52) fixed to the upper part of the rear frame (8). The three parts of the fuselage are fixed and firmly fixed to the loading platform.

以上により、この歩行型田植機(1)において、作業者が操縦ハンドル(9)の左右のハンドルグリップ(9a)を把持し、植付昇降レバー(37)を植付位置に操作して機体を下降させると共に植付部を作動可能な状態にし、主クラッチレバー(36)を入位置に操作して機体を走行させながら植付部を作動させることにより、圃場に同時に4条分の苗を植え付けていく。圃場の畦際に到達すると、植付昇降レバー(37)を上昇位置に操作して植付部の作動を停止させると共に機体を上昇させ、旋回内側のサイドクラッチレバー(41)を操作して旋回内側の車輪(5)のサイドクラッチを断ち、機体を旋回させる。この機体旋回時、植付昇降レバー(37)の上昇位置への操作で機体が上昇作動するが、所望の高さに機体が上昇したときに植付昇降レバー(37)を中立位置へ操作すれば、その高さで機体を固定することができ、作業者が機体の旋回操作を容易に行える。以下、同様に植付昇降レバー(37)を植付位置に操作して次行程の植付作業を行い、圃場に苗の植付を行っていく。尚、路上走行時等は、機体を上昇させ、変速レバー(38)を適宜操作して走行させる。   As described above, in this walking type rice transplanter (1), the operator holds the left and right handle grips (9a) of the steering handle (9) and operates the planting lift lever (37) to the planting position to move the aircraft. At the same time, the planting part is made operable, the main clutch lever (36) is operated to the on position, and the planting part is operated while the aircraft is running, so that four seedlings are planted simultaneously in the field. To go. When reaching the edge of the field, the planting lift lever (37) is operated to the raised position to stop the operation of the planting unit, the machine body is raised, and the side clutch lever (41) inside the turn is operated to turn. The side clutch of the inner wheel (5) is disconnected and the aircraft is turned. When the aircraft is turning, the aircraft is raised by operating the planting lift lever (37) to the raised position. When the aircraft is raised to a desired height, the planting lift lever (37) is operated to the neutral position. For example, the aircraft can be fixed at the height, and the operator can easily turn the aircraft. Thereafter, similarly, the planting lift lever (37) is operated to the planting position to perform the planting operation in the next step, and planting seedlings in the field. When traveling on the road or the like, the body is raised and travels by appropriately operating the speed change lever (38).

そして、この歩行型田植機(1)の走行車体は、左右の車輪(5)と、該車輪(5)を後端部に支持して上下方向に回動する左右各々の走行伝動ケース(4)と、該走行伝動ケース(4)と一体で回動する左右各々のアーム(21)と、油圧昇降シリンダ(16)のシリンダロッド(17)の前後方向の移動に追従して前後に移動する中継リンク部材(18)と、該中継リンク部材(18)の左右両端と前記アーム(21)との間を連結する左右各々の連結ロッド(20)とを設け、シリンダロッド(17)が機体後方に向けて移動することにより左右の車輪(5)が下動する構成とし、シリンダロッド(17)に中継リンク部材(18)の左右中央部が入り込む切り欠き溝(17a)を設け、シリンダロッド(17)と中継リンク部材(18)とを連結する上下方向の連結軸(19)を設け、該連結軸(19)が通るシリンダロッド(17)又は中継リンク部材(18)に設けた第一の孔(18c)の孔径を連結軸(19)の軸径よりも大きく構成し、前記切り欠き溝(17a)の底面(17b)の左右両端部が中継リンク部材(18)の前面(18d)に接触して前記底面(17b)の後方移動に追従して中継リンク部材(18)が後方に移動する構成とし、左右の連結ロッド(20)を中継リンク部材(18)の左右両端の連結部(18b)において貫通させ、連結ロッド(20)が貫通する前記連結部(18b)に設けた第二の孔(18b−4)の孔径を連結ロッド(20)の軸径よりも大きく構成し、連結ロッド(20)の後端部に設けた固定具となる二重ナット(25)と前記連結部(18b)との間に圧縮ばね(22)を設けた。   And the traveling vehicle body of this walking type rice transplanter (1) has left and right wheels (5), and left and right traveling transmission cases (4) that support the wheels (5) at the rear end and rotate in the vertical direction. ), The left and right arms (21) that rotate together with the traveling transmission case (4), and the forward / backward movement of the cylinder rod (17) of the hydraulic lift cylinder (16). A relay link member (18) and left and right connecting rods (20) for connecting the left and right ends of the relay link member (18) and the arm (21) are provided, and the cylinder rod (17) is located at the rear of the fuselage. The left and right wheels (5) move downward by moving toward the center, and the cylinder rod (17) is provided with a notch groove (17a) into which the left and right central portions of the relay link member (18) enter, 17) and relay link member (1) ) And a hole diameter of the first hole (18c) provided in the cylinder rod (17) or the relay link member (18) through which the connection shaft (19) passes is connected. The shaft (19) is configured to be larger than the shaft diameter, and both left and right end portions of the bottom surface (17b) of the notch groove (17a) are in contact with the front surface (18d) of the relay link member (18) to thereby form the bottom surface (17b). The relay link member (18) moves rearward following the rearward movement of the relay link member. The left and right connecting rods (20) are passed through the connecting portions (18b) at the left and right ends of the relay link member (18) to connect the connecting rods. The hole diameter of the 2nd hole (18b-4) provided in the said connection part (18b) which (20) penetrates is comprised larger than the axial diameter of a connection rod (20), and the rear-end part of a connection rod (20) Double nut (25 The compression spring (22) between said coupling portion (18b) and provided.

従って、この走行車体は、左右の車輪(5)で走行する。そして、油圧昇降シリンダ(16)のシリンダロッド(17)が後方に移動すると、切り欠き溝(17a)の底面(17b)の左右両端部が中継リンク部材(18)の前面(18d)に接触して中継リンク部材(18)が後方に移動し、該中継リンク部材(18)から圧縮ばね(22)を介して左右の連結ロッド(20)が作動し、該連結ロッド(20)の作動でアーム(21)を介して左右の走行伝動ケース(4)が下側に回動し、左右の車輪(5)が下側に移動して車体の対地高さが変わる。圧縮ばね(22)のばね力は車輪(5)が下動する側に作用しているので、左右の車輪(5)の接地荷重に応じて滑らかに車輪(5)を上下動させることができると共に、圧縮ばね(22)により中継リンク部材(18)を前側に押圧するので、中継リンク部材(18)の前面(18d)をシリンダロッド(17)の切り欠き溝(17a)の底面(17b)に安定して接触させることができる。また、連結軸(19)が通る第一の孔(18c)の孔径を連結軸(19)の軸径よりも大きく構成し、連結ロッド(20)が貫通する第二の孔(18b−4)の孔径を連結ロッド(20)の軸径よりも大きく構成したので、車体の左右傾斜で左右の車輪(5)で接地荷重が相違するとき、中継リンク部材(18)はその前面(18d)が前記切り欠き溝(17a)の底面(17b)の左右両端部の何れかを支点に前後に回動し、左右の連結ロッド(20)が互いに前後反対側に移動し、接地荷重が大きい側の車輪(5)が下動し反対側の車輪(5)が上動し、左右水平姿勢となるよう車体の左右傾斜姿勢が修正される。このとき、切り欠き溝(17a)に中継リンク部材(18)の左右中央部が入り込んでいるので、中継リンク部材(18)を切り欠き溝(17a)で案内して適正な方向で前後に回動させることができる。また、左右の車輪(5)の接地荷重の相違が小さいときには、中継リンク部材(18)が前後に回動せずに中継リンク部材(18)の前面(18d)と切り欠き溝(17a)の底面(17b)の左右両端部とが接触した状態が維持され、左右の車輪(5)が相対的に上下動しない。   Accordingly, the traveling vehicle body travels with the left and right wheels (5). When the cylinder rod (17) of the hydraulic lift cylinder (16) moves rearward, the left and right ends of the bottom surface (17b) of the notch groove (17a) come into contact with the front surface (18d) of the relay link member (18). The relay link member (18) moves rearward, the left and right connecting rods (20) are operated from the relay link member (18) via the compression spring (22), and the arm is operated by the operation of the connecting rod (20). The left and right traveling transmission cases (4) rotate downward via (21), and the left and right wheels (5) move downward to change the ground height of the vehicle body. Since the spring force of the compression spring (22) acts on the side where the wheel (5) moves downward, the wheel (5) can be smoothly moved up and down according to the ground load of the left and right wheels (5). At the same time, since the relay link member (18) is pressed forward by the compression spring (22), the front surface (18d) of the relay link member (18) is connected to the bottom surface (17b) of the notch groove (17a) of the cylinder rod (17). Can be stably contacted. Moreover, the hole diameter of the 1st hole (18c) which a connection shaft (19) passes is comprised larger than the shaft diameter of a connection shaft (19), and the 2nd hole (18b-4) which a connection rod (20) penetrates Is larger than the shaft diameter of the connecting rod (20). Therefore, when the ground load is different between the left and right wheels (5) due to the left-right inclination of the vehicle body, the relay link member (18) has its front surface (18d) The left and right ends of the bottom surface (17b) of the notch groove (17a) are pivoted back and forth, and the left and right connecting rods (20) are moved to the opposite side of the front and back, so that the ground load is larger. The left and right tilt posture of the vehicle body is corrected so that the wheel (5) moves downward and the wheel (5) on the opposite side moves upward and assumes a horizontal horizontal posture. At this time, since the left and right center portions of the relay link member (18) are inserted into the notch groove (17a), the relay link member (18) is guided by the notch groove (17a) and rotated back and forth in an appropriate direction. Can be moved. When the difference in grounding load between the left and right wheels (5) is small, the relay link member (18) does not rotate back and forth, and the front surface (18d) of the relay link member (18) and the notch groove (17a) The state where the left and right ends of the bottom surface (17b) are in contact with each other is maintained, and the left and right wheels (5) do not move up and down relatively.

よって、左右の車輪(5)の接地荷重に応じて滑らかに車輪(5)を上下動させることができ、車体が不安定になるようなことを防止できると共に、圧縮ばね(22)により中継リンク部材(18)の前面(18d)をシリンダロッド(17)の切り欠き溝(17a)の底面(17b)に安定して接触させることができ、車輪(5)の上下動を適正に行え、更に従来のようなシリンダロッドと中継リンク部材との間の圧縮ばねが不要になって車輪(5)の上下動機構の小型化が図れる。また、機体の左右傾斜で左右の車輪(5)で接地荷重が相違するとき、中継リンク部材(18)が前後に回動して左右の連結ロッド(20)が互いに前後反対側に移動し、左右水平姿勢となるよう車体の左右傾斜姿勢が修正され、ローリング油圧シリンダのような格別の駆動装置が不要になり、機体の小型化ひいてはコストダウンが図れる。また、左右の車輪(5)の接地荷重に応じて車体の左右傾斜姿勢が修正されるので、車体の左右傾斜姿勢を適正に修正できる。このとき、中継リンク部材(18)が切り欠き溝(17a)に案内されて適正な方向で前後に回動し、車体の左右傾斜姿勢の修正を適正に行える。更に、左右の車輪(5)の接地荷重の相違が小さいときには、左右の車輪(5)が相対的に上下動しないので、左右の車輪(5)が個別に無闇に上下動することによりかえって車体の左右傾斜姿勢が不安定になるようなことを防止できる。   Therefore, the wheel (5) can be smoothly moved up and down in accordance with the ground load of the left and right wheels (5), the vehicle body can be prevented from becoming unstable, and the relay link is provided by the compression spring (22). The front surface (18d) of the member (18) can be stably brought into contact with the bottom surface (17b) of the notch groove (17a) of the cylinder rod (17), the wheel (5) can be moved up and down properly, The conventional compression spring between the cylinder rod and the relay link member is not required, and the vertical movement mechanism of the wheel (5) can be downsized. Further, when the ground load is different between the left and right wheels (5) due to the left and right inclination of the fuselage, the relay link member (18) rotates back and forth, and the left and right connecting rods (20) move to the front and rear opposite sides, The left / right tilting posture of the vehicle body is corrected so that the horizontal posture is left and right, and a special driving device such as a rolling hydraulic cylinder is not necessary, so that the size of the airframe can be reduced and the cost can be reduced. Moreover, since the left-right inclination posture of the vehicle body is corrected according to the ground load of the left and right wheels (5), the left-right inclination posture of the vehicle body can be appropriately corrected. At this time, the relay link member (18) is guided by the notch groove (17a) and rotated back and forth in an appropriate direction, so that the right / left inclined posture of the vehicle body can be corrected appropriately. Further, when the difference in grounding load between the left and right wheels (5) is small, the left and right wheels (5) do not move up and down relatively, so the left and right wheels (5) move up and down individually and darkly. It is possible to prevent the left-right tilting posture of being unstable.

また、この歩行型田植機(1)は、機体の前部に配置した主伝動ケース(3)と、該主伝動ケース(3)の左右に配置した走行伝動ケース(4)と、該走行伝動ケース(4)からの動力で駆動する左右各々の車輪(5)と、主伝動ケース(3)からの動力が伝達される植付伝動ケース(7)と、該植付伝動ケース(7)からの動力で駆動し苗取口(28)上の苗を取って圃場に植え付ける苗植付装置(10)と、前記苗取口(28)に一株分ずつ苗を供給する苗載台(11)とを設け、前記主伝動ケース(3)から後方に延びるフレームを前部フレーム(6)と後部フレーム(8)とに分割し、前部フレーム(6)に予備苗載台(45)を支持させて設け、後部フレーム(8)に植付伝動ケース(7)、苗植付装置(10)、苗載台(11)及び操縦ハンドル(9)を支持させて設けている。   The walking type rice transplanter (1) includes a main transmission case (3) disposed at the front of the machine body, a traveling transmission case (4) disposed on the left and right of the main transmission case (3), and the traveling transmission. From left and right wheels (5) driven by power from case (4), planting transmission case (7) to which power from main transmission case (3) is transmitted, and planting transmission case (7) A seedling planting device (10) that is driven by the power of the plant to take seedlings on the seedling outlet (28) and plant them in the field, and a seedling stand (11) that supplies seedlings to the seedling inlet (28) one by one ), And a frame extending backward from the main transmission case (3) is divided into a front frame (6) and a rear frame (8), and a preliminary seedling stage (45) is provided on the front frame (6). Provided with support, planting transmission case (7), seedling planting device (10), seedling mount (11) on rear frame (8) Is provided by supporting the fine control handle (9).

従って、この歩行型の苗移植機は、主伝動ケース(3)からの動力が走行伝動ケース(4)を介して左右の車輪(5)へ伝達され、該左右の車輪(5)で走行する。また、主伝動ケース(3)からの動力が植付伝動ケース(7)を介して苗植付装置(10)へ伝達され、該苗植付装置(10)で圃場に苗を植え付けていく。そして、修理等のために植付伝動ケース(7)、苗植付装置(10)、苗載台(11)及び操縦ハンドル(9)を取り外すとき、予備苗載台(45)を前部フレーム(6)側に残したまま取り外すことができる。また、修理等のために、主伝動ケース(3)、走行伝動ケース(4)、車輪(5)、前部フレーム(6)及び予備苗載台(45)を一体で取り外すことができる。よって、取り外し作業が容易に行えて修理や点検が容易になる。   Therefore, in this walking type seedling transplanter, the power from the main transmission case (3) is transmitted to the left and right wheels (5) via the traveling transmission case (4) and travels by the left and right wheels (5). . Moreover, the motive power from the main transmission case (3) is transmitted to the seedling planting device (10) through the planting transmission case (7), and the seedling planting device (10) plants seedlings in the field. Then, when removing the planting transmission case (7), the seedling planting device (10), the seedling platform (11) and the steering handle (9) for repair or the like, the spare seedling platform (45) is moved to the front frame. (6) It can be removed while remaining on the side. Further, the main transmission case (3), the traveling transmission case (4), the wheels (5), the front frame (6), and the spare seedling stage (45) can be removed as a unit for repair or the like. Therefore, the removal work can be easily performed, and repair and inspection are facilitated.

また、この歩行型田植機(1)は、植付伝動ケース(7)を後部フレーム(8)の上面に載置して固定している。従って、修理等のために植付伝動ケース(7)を取り外すとき、植付伝動ケース(7)を上方に持ち上げて、後部フレーム(8)及び操縦ハンドル(9)を取り外すことなく、植付伝動ケース(7)を容易に取り外すことができ、修理や点検が容易になる。   Moreover, this walking type rice transplanter (1) mounts and fixes the planting transmission case (7) on the upper surface of the rear frame (8). Therefore, when removing the planting transmission case (7) for repair or the like, the planting transmission case (7) is lifted upward and the planting transmission is removed without removing the rear frame (8) and the steering handle (9). The case (7) can be easily removed, and repair and inspection are facilitated.

歩行型田植機を示す側面図Side view showing walking rice transplanter 歩行型田植機を示す平面図Top view showing walking rice transplanter 中継リンク部材を示す断面平面図(a:一部の断面側面図)Sectional plan view showing relay link member (a: partial sectional side view) 予備苗載台を示す側面図Side view showing the spare seedling stage 前部フレームと後部フレームとの結合部分を示す側面図Side view showing the joint between the front frame and the rear frame 油圧装置の主要部を示す側面図Side view showing main parts of hydraulic system

符号の説明Explanation of symbols

1:歩行型田植機、3:主伝動ケース、4:走行伝動ケース、5:車輪、6:前部フレーム、7:植付伝動ケース、8:後部フレーム、9:操縦ハンドル、10:苗植付装置、11:苗載台、28:苗取口、45:予備苗載台   1: walking rice transplanter, 3: main transmission case, 4: traveling transmission case, 5: wheels, 6: front frame, 7: planting transmission case, 8: rear frame, 9: steering handle, 10: seedling planting Attachment device, 11: seedling stage, 28: seedling outlet, 45: preliminary seedling stage

Claims (2)

機体の前部に配置した主伝動ケース(3)と、該主伝動ケース(3)の左右に配置した走行伝動ケース(4)と、該走行伝動ケース(4)からの動力で駆動する左右各々の車輪(5)と、主伝動ケース(3)からの動力が伝達される植付伝動ケース(7)と、該植付伝動ケース(7)からの動力で駆動し苗取口(28)上の苗を取って圃場に植え付ける苗植付装置(10)と、前記苗取口(28)に一株分ずつ苗を供給する苗載台(11)とを設け、前記主伝動ケース(3)から後方に延びるフレームを前部フレーム(6)と後部フレーム(8)とに分割し、前部フレーム(6)に予備苗載台(45)を支持させて設け、後部フレーム(8)に植付伝動ケース(7)、苗植付装置(10)、苗載台(11)及び操縦ハンドル(9)を支持させて設けた歩行型の苗移植機。 A main transmission case (3) disposed at the front of the machine body, a traveling transmission case (4) disposed on the left and right of the main transmission case (3), and left and right driven by the power from the traveling transmission case (4) Wheel (5), planting transmission case (7) to which power from the main transmission case (3) is transmitted, and the seedling outlet (28) on the seedling outlet (28) driven by the power from the planting transmission case (7) A seedling planting device (10) for taking seedlings and planting them in a field, and a seedling mount (11) for supplying seedlings to the seedling outlet (28) one by one, the main transmission case (3) The frame extending rearward from the front is divided into a front frame (6) and a rear frame (8), and a preliminary seedling stage (45) is supported on the front frame (6) to be planted on the rear frame (8). Supporting the transmission case (7), seedling planting device (10), seedling stage (11) and control handle (9) Providing walking-type seedling transplanting machine. 植付伝動ケース(7)を後部フレーム(8)の上面に載置して固定した請求項1に記載の歩行型の苗移植機。 The walking seedling transplanter according to claim 1, wherein the planting transmission case (7) is placed and fixed on the upper surface of the rear frame (8).
JP2007155303A 2007-06-12 2007-06-12 Walking type seedling transplanter Pending JP2008306947A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007155303A JP2008306947A (en) 2007-06-12 2007-06-12 Walking type seedling transplanter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007155303A JP2008306947A (en) 2007-06-12 2007-06-12 Walking type seedling transplanter

Publications (1)

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JP2008306947A true JP2008306947A (en) 2008-12-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2007155303A Pending JP2008306947A (en) 2007-06-12 2007-06-12 Walking type seedling transplanter

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Country Link
JP (1) JP2008306947A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8278548B2 (en) 2009-01-09 2012-10-02 Rohm And Haas Company Acrylic film and acrylic backsheet prepared therefrom

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8278548B2 (en) 2009-01-09 2012-10-02 Rohm And Haas Company Acrylic film and acrylic backsheet prepared therefrom

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