JP2015104328A

JP2015104328A - Seedling transplanting machine

Info

Publication number: JP2015104328A
Application number: JP2013247183A
Authority: JP
Inventors: 名本　学; Manabu Namoto; 学名本; 福島　寿美; Sumi Fukushima; 寿美福島; 阪田　賢一郎; Kenichiro Sakata; 賢一郎阪田
Original assignee: Iseki and Co Ltd; Iseki Agricultural Machinery Mfg Co Ltd
Current assignee: Iseki and Co Ltd; Iseki Agricultural Machinery Mfg Co Ltd
Priority date: 2013-11-29
Filing date: 2013-11-29
Publication date: 2015-06-08
Anticipated expiration: 2033-11-29
Also published as: JP6237163B2

Abstract

PROBLEM TO BE SOLVED: To provide a seedling transplanting machine that can prevent the breakage of a planting rotary and a planting clutch due to an overload, even if the planting clutch is not cut by any chance in the reverse travel of a machine body.SOLUTION: A seedling transplanting machine is provided with a transmission case 12 in which a traveling transmission system A and a seedling planting transmission system B for transmitting the power from an engine 20 to running wheels 10 and 11 and a seedling planting unit 4, respectively, are included inside, respectively. A planting transmission shaft 66 for transmitting a driving force from the seedling planting transmission system B in the transmission case 12 to a seedling loading member 51 and a seedling planter 52 of the seedling planting unit 4 is provided, and a forward-and-reverse rotation driving mechanism 19 for reversing the transmission rotation of the planting transmission shaft 66 even when a traveling lever 93 is reversely operated is provided in the seedling planting transmission system B.

Description

この発明は、苗の植付伝動機構に特徴がある苗移植機に関する。 The present invention relates to a seedling transplanter characterized by a seedling planting transmission mechanism.

機体後部に設けた苗タンクに載置した苗床から苗を苗植付部の苗植付装置で挟み取りながら圃場に苗を植え付ける特許文献１及び２などに記載の苗移植機において、機体後進時に苗植付部への伝動を切る植付クラッチ装置が備えられた苗移植機が開示されている。 In the seedling transplanting machine described in Patent Documents 1 and 2 or the like, in which seedlings are planted in a field while sandwiching seedlings from a seedbed placed in a seedling tank provided in the rear part of the body with a seedling planting device of a seedling planting part, A seedling transplanting machine provided with a planting clutch device that cuts off transmission to a seedling planting unit is disclosed.

上記苗移植機は、機体を後進させると、苗植付部に駆動力を伝動する植付伝動軸も逆回転する構成を有するので、植付クラッチを切って駆動力を遮断することにより、逆転駆動力により植付クラッチや苗植付装置が逆転して負荷が生じ、この負荷で破損することが防止される。 Since the seedling transplanter has a configuration in which the planting transmission shaft that transmits the driving force to the seedling planting portion also rotates in the reverse direction when the machine is moved backward, the planting clutch is turned off to shut off the driving force. Due to the driving force, the planting clutch and the seedling planting device are reversely rotated to generate a load, and the load is prevented from being damaged.

特開２００９−４１５９８号公報JP 2009-41598 A 特開２０１１−２１７６８５号公報JP2011-217865A

上記特許文献１及び２記載の構成では、機体を後進させると苗植付部が自動上昇し、このとき同時に植付クラッチが切れることで、植付伝動軸の回転方向が逆転しても、苗植付装置や植付クラッチには負荷がかからない構成となっている。 In the configurations described in Patent Documents 1 and 2, the seedling planting part automatically rises when the aircraft is moved backward, and at the same time the planting clutch is disengaged, so that the seedling planting shaft can be reversed even if the rotation direction of the planting transmission shaft is reversed. The planting device and the planting clutch are configured not to be loaded.

しかしながら、植付クラッチのクラッチ爪は、植付作業中に外れないように強く噛み合う構成としているので、逆転時に外れないことがあり、これにより植付クラッチの軸や植付ロータリが逆転することがあった。特に植付ロータリは、偏心ギアを組み合わせているので、逆転する力がかかり続けると、過負荷で破損することがあった。 However, since the clutch pawls of the planting clutch are configured to mesh strongly so that they do not come off during planting work, they may not come off during reverse rotation, which may cause the shaft of the planting clutch and the planting rotary to reverse. there were. In particular, since the planting rotary is combined with an eccentric gear, if a reverse force continues to be applied, the planted rotary may break due to overload.

本発明の課題は、機体の後進時に万一植付クラッチが切れなくても、過負荷による植付ロータリや植付クラッチの破損を防止することができる苗移植機を提供することである。 An object of the present invention is to provide a seedling transplanting machine that can prevent the planting rotary and the planting clutch from being damaged due to overload even if the planting clutch is not disengaged when the aircraft is moving backward.

本発明の課題は、次の解決手段により解決される。
請求項１記載の発明は、走行用車輪（１０、１１）とエンジン（２０）と操縦部（３３）を備えた走行車体（２）と、エンジン（２０）からの動力を走行用車輪（１０、１１）と苗植付部（４）にそれぞれ伝達する走行伝動系（Ａ）と苗植付伝動系（Ｂ）をそれぞれ内部に備えたミッションケース（１２）と、走行車体（２）の走行操作を行う走行レバー（９３）と、苗を積載する苗載置部材（５１）と苗載置部材（５１）から苗を取って圃場に植え付ける苗植付装置（５２）と苗植付装置（５２）への苗植付伝動系（Ｂ）からの駆動力を入切する植付クラッチ装置（４５）を有する苗植付部（４）を装着した苗移植機において、苗植付伝動系（Ｂ）からの駆動力を苗植付部（４）の苗載置部材（５１）と苗植付装置（５２）に駆動力を伝動する植付伝動軸（６６）と、走行レバー（９３）が後進操作されると、植付伝動軸（６６）を逆転させる正逆転伝動機構（１９）を設けたことを特徴とする苗移植機である。 The problems of the present invention are solved by the following means.
The invention according to claim 1 includes a traveling vehicle body (2) provided with traveling wheels (10, 11), an engine (20), and a control unit (33), and power from the engine (20) as traveling wheels (10). 11) and the seedling planting part (4), respectively, a transmission case (12) having a traveling transmission system (A) and a seedling planting transmission system (B), respectively, and traveling of the traveling vehicle body (2). A traveling lever (93) for performing an operation, a seedling placement member (51) for loading seedlings, a seedling planting device (52) and a seedling planting device (51) for taking seedlings from a seedling placement member (51) and planting them in a field 52) In a seedling transplanter equipped with a seedling planting part (4) having a planting clutch device (45) for turning on and off the driving force from the seedling planting transmission system (B), The driving force from B) is transmitted to the seedling placement member (51) and the seedling planting device (52) of the seedling planting part (4). A seedling transplanter provided with a forward / reverse transmission mechanism (19) for reversing the planting transmission shaft (66) when the planting transmission shaft (66) and the travel lever (93) are operated backwards. It is.

請求項２記載の発明は、エンジン（２０）とミッションケース（１２）内の走行伝動系（Ａ）と苗植付伝動系（Ｂ）の間には油圧式無段変速装置（２３）を設け、植付伝動軸（６６）に正逆転伝動機構（１９）を設け、該正逆転伝動機構（１９）は油圧式無段変速装置（２３）に連結した入力軸（１６）と該入力軸（１６）の駆動力がカウンタ軸（１７）を経由して伝達される中継軸（２１）と該中継軸（２１）の駆動力が伝達される植付出力軸（２２）を備え、入力軸（１６）に設けられたキー（６９）の入力があって初めて駆動する第１入力ギア（１６ａ）を入力軸（１６）に設け、該第１入力ギア（１６ａ）に常時噛合するカウンタギア（１７ａ）をカウンタ軸（１７）に設け、前記カウンタギア（１７ａ）と常時噛合する第１中継ギア（２１ａ）を中継軸（２１）に設け、前記キー（６９）の入力があって初めて駆動する第２入力ギア（１６ｂ）を入力軸（１６）に設け、第２入力ギア（１６ｂ）に常時噛合する第２中継ギア（２１ｂ）を中継軸（２１）に設け、第３中継伝動ギア（２１ｃ）と第４中継伝動ギア（２１ｄ）を中継軸（２１）に設け、第３中継伝動ギア（２１ｃ）と第４中継伝動ギア（２１ｄ）のいずれかとそれぞれ噛合する第１植付伝動ギア（２２ａ）と第２植付伝動ギア（２２ｂ）を植付出力軸（２２）の軸上にスライド可能に設け、入力軸（１６）の第１入力ギア（１６ａ）と第２入力ギア（１６ｂ）のいずれかにキー（６９）を切り替えて入力させることで中継軸（２１）の回転方向を切り替える切替装置（４７、４８、６９）を設け、走行レバー（９３）と切替装置（４７、４８、６９）を連動部材（６８）で連結して構成したことを特徴とする請求項１記載の苗移植機である。 According to the second aspect of the present invention, a hydraulic continuously variable transmission (23) is provided between the engine (20), the traveling transmission system (A) and the seedling planting transmission system (B) in the transmission case (12). The planting transmission shaft (66) is provided with a forward / reverse transmission mechanism (19), and the forward / reverse transmission mechanism (19) is connected to a hydraulic continuously variable transmission (23) and the input shaft (16). 16) a relay shaft (21) through which the driving force of the relay shaft (17) is transmitted and a planting output shaft (22) through which the driving force of the relay shaft (21) is transmitted. The first input gear (16a) that is driven only when the key (69) provided on 16) is input is provided on the input shaft (16), and the counter gear (17a) that is always meshed with the first input gear (16a). ) Is provided on the counter shaft (17) and is always meshed with the counter gear (17a). (21a) is provided on the relay shaft (21), the second input gear (16b) that is driven only when the key (69) is input is provided on the input shaft (16), and the second input gear (16b) is always provided. The meshing second relay gear (21b) is provided on the relay shaft (21), the third relay transmission gear (21c) and the fourth relay transmission gear (21d) are provided on the relay shaft (21), and the third relay transmission gear ( The first planting transmission gear (22a) and the second planting transmission gear (22b) meshing with either the 21c) or the fourth relay transmission gear (21d) can slide on the planting output shaft (22). Switching to switch the rotation direction of the relay shaft (21) by switching the key (69) to either the first input gear (16a) or the second input gear (16b) of the input shaft (16). Device (47, 48, 69) provided, travel lever 93) and a switching device (47,48,69) seedling transplanter according to claim 1, characterized by being configured by connecting with interlocking member (68) a.

請求項３記載の発明は、走行レバー（９３）の操作により、油圧式無段変速装置（２３）の出力を停止させる中立域（Ｎ）を走行レバーガイド（４９）に設定し、該走行レバーガイド（４９）の前記中立域（Ｎ）に走行レバー（９３）を機体側方に操作可能な操作空間部（Ｐ）を形成し、前記操作空間部（Ｐ）に走行レバー（９３）を操作すると、連動部材（６８）が切替装置（４７、４８、６９）を作動させて植付伝動軸（６６）の回転方向を逆転させる構成としたしたことを特徴とする請求項１又は２に記載の苗移植機である。 According to the third aspect of the present invention, the neutral zone (N) for stopping the output of the hydraulic continuously variable transmission (23) is set in the traveling lever guide (49) by the operation of the traveling lever (93), and the traveling lever An operation space (P) is formed in the neutral zone (N) of the guide (49) so that the travel lever (93) can be operated to the side of the machine body, and the travel lever (93) is operated in the operation space (P). Then, the interlocking member (68) operates the switching device (47, 48, 69) to reverse the rotational direction of the planting transmission shaft (66). This is a seedling transplanter.

請求項４記載の発明は、走行レバー（９３）の操作量から走行車体（２）の前後進状態及び中立状態又はアイドリング状態を検知する走行操作検知部材（８３）を設け、油圧式無段変速装置（２３）に設けられたトラニオンアーム（８４）の回動量から前後進及び中立を検知する出力検知部材（８５）を設け、走行車体（２）の旋回操作を検知する旋回検知部材（８７）を設け、旋回検知部材（８７）が旋回の開始を検知すると苗載置部材（５１）を上昇させ、旋回の終了を検知すると苗載置部材（５１）を下降させると共に植付クラッチ装置（４５）を入にする旋回連動機構（８９）を設け、旋回検知部材（８７）が旋回の開始を検知した後、旋回の終了を検知する前に走行操作検知部材（８３）、出力検知部材（８５）のいずれか一方、または両方が中立を検知しているときは、旋回検知部材（８７）の検知を行わない構成としたことを特徴とする請求項１から３の何れか１項に記載の苗移植機である。 The invention according to claim 4 is provided with a traveling operation detecting member (83) for detecting the forward / backward traveling state, the neutral state or the idling state of the traveling vehicle body (2) from the operation amount of the traveling lever (93), and is provided with a hydraulic continuously variable transmission. An output detection member (85) that detects forward / backward movement and neutrality from the amount of rotation of the trunnion arm (84) provided in the device (23) is provided, and a turning detection member (87) that detects a turning operation of the traveling vehicle body (2). When the turning detection member (87) detects the start of turning, the seedling placement member (51) is raised, and when the end of turning is detected, the seedling placement member (51) is lowered and the planting clutch device (45 ) Is provided, and after the turning detection member (87) detects the start of turning and before the end of turning is detected, the traveling operation detection member (83) and the output detection member (85 ) The seedling transplanter according to any one of claims 1 to 3, wherein the turning detection member (87) is not detected when both are detecting neutrality. .

請求項５記載の発明は、走行レバー（９３）の操作位置がアイドリング位置にあることを検知する走行操作検知部材（８３）又は前記出力検知部材（８５）が所定時間以上中立を検知する場合、又は走行レバー（９３）の操作位置がアイドリング位置にあることを走行操作検知部材（８３）が検知すると、走行車体（２）に設けたエンジン（２０）を停止させるアイドリング機構（９０）を設け、該アイドリング機構（９０）の作動を検知するアイドリング検知部材（９１）を設け、該アイドリング検知部材（９１）が検知状態になると、旋回検知部材（８７）の検知を行わない制御機構を設けたことを特徴とする請求項１から４の何れか１項に記載の苗移植機である。 In the invention according to claim 5, when the traveling operation detecting member (83) for detecting that the operating position of the traveling lever (93) is in the idling position or the output detecting member (85) detects neutrality for a predetermined time or more, Alternatively, when the traveling operation detection member (83) detects that the operation position of the traveling lever (93) is at the idling position, an idling mechanism (90) for stopping the engine (20) provided on the traveling vehicle body (2) is provided. An idling detection member (91) that detects the operation of the idling mechanism (90) is provided, and a control mechanism that does not detect the turning detection member (87) when the idling detection member (91) is in a detection state is provided. The seedling transplanter according to any one of claims 1 to 4, characterized in that:

請求項１記載の発明によれば、走行車体２を後進操作すると、正逆転伝動機構１９が植付伝動軸６６を逆転させることにより、後進時に苗植付装置５２は正転方向に動き続けることができるので、植付クラッチ装置４５が切れなくても、植付クラッチ装置４５や苗植付装置５２が破損することが防止される。 According to the first aspect of the present invention, when the traveling vehicle body 2 is operated backward, the forward / reverse transmission mechanism 19 reverses the planting transmission shaft 66, so that the seedling planting device 52 continues to move in the forward rotation direction during backward travel. Therefore, even if the planting clutch device 45 is not disconnected, the planting clutch device 45 and the seedling planting device 52 are prevented from being damaged.

植付クラッチ装置４５が切れて苗植付部４の駆動が停止すると、苗植付装置５２が設定された停止位置で停止するので、植付再開時に同じ苗の前後間隔（株間）を取ることができ、苗の植付精度が従来技術より向上する。 When the planting clutch device 45 is cut off and the driving of the seedling planting unit 4 is stopped, the seedling planting device 52 stops at the set stop position, and therefore, the same seedling front-rear interval (between strains) is taken when planting is resumed. The planting accuracy of the seedling is improved compared to the conventional technology.

なお、苗植付装置５２の前記停止位置は、各植付伝動軸６６に設けられている一対の植込杆５２ａが土壌内に無い位置で、これにより土の付着により植込杆５２ａが苗を取れなくなることを防止することができる。 In addition, the said stop position of the seedling planting apparatus 52 is a position where a pair of planting pot 52a provided in each planting transmission shaft 66 does not exist in soil, and by this, the planting pot 52a becomes seedling by adhesion of soil. Can be prevented.

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、走行レバー９３による走行車体２の前進操作では正転駆動する入力軸１６からの動力を植付伝動軸６６では正転させ、走行レバー９３による走行車体２の後進操作では逆転駆動する入力軸１６からの動力であっても植付伝動軸６６では正転させる苗植付伝動系Ｂをミッションケース１２内に設けているので、走行車体２の前進又は後進に拘わらず、苗植付装置５２を正転駆動できるので苗の植付操作性が従来技術に比較して向上する。 According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, in the forward operation of the traveling vehicle body 2 by the traveling lever 93, the power from the input shaft 16 that is normally rotated is transmitted to the planting transmission shaft 66. A seedling planting transmission system B is provided in the mission case 12 so that the planting transmission shaft 66 rotates in the forward direction and the planting transmission shaft 66 rotates in the forward direction even if the power from the input shaft 16 is reversely driven in the reverse operation of the traveling vehicle body 2 by the traveling lever 93. Therefore, the seedling planting device 52 can be driven forward regardless of whether the traveling vehicle body 2 moves forward or backward, so that the seedling planting operability is improved as compared with the conventional technique.

請求項３記載の発明によれば、請求項１又は２記載の発明の効果に加えて、走行レバー９３を後進域に操作する前に、走行レバーガイド４９の中立域Ｎの操作空間部Ｐに走行レバー９３を操作した際に、正逆転伝動機構１９が作動することにより、走行車体２の前進又は後進用の動力伝動系が切り替えられた後に植付伝動軸６６に駆動力が伝動されるので、駆動力が伝動され始めてから動力伝動系の伝動経路が切り替わるまでに負荷が生じることが防止され、負荷による走行車体２、特にミッションケース１２内の動力伝動系Ａ、Ｂの破損や耐久性の低下が防止される。 According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, before operating the travel lever 93 to the reverse travel area, the operation space P in the neutral area N of the travel lever guide 49 is provided. When the traveling lever 93 is operated, the forward / reverse transmission mechanism 19 is activated, so that the driving force is transmitted to the planting transmission shaft 66 after the forward or reverse power transmission system of the traveling vehicle body 2 is switched. In addition, it is possible to prevent a load from being generated after the driving force starts to be transmitted until the transmission path of the power transmission system is switched, and damage or durability of the power transmission systems A and B in the traveling vehicle body 2, particularly the transmission case 12, due to the load. Reduction is prevented.

請求項４記載の発明によれば、請求項１から３の何れか１項に記載の発明の効果に加えて、旋回走行が開始された後、旋回走行の終了が検知される前に走行操作検知部材８３と出力検知部材８５が中立を検知したときは、旋回検知部材８７の検知を行わない構成としたことにより、旋回途中で走行車体２を停車させて苗や肥料の補充を行う際に、エンジンの振動等によって旋回検知部材８７が旋回終了を誤検知することを防止できるので、旋回連動機構８９が作動して苗載置部材５１を下降させたり、植付クラッチ装置４５を入にして苗植付装置５２を作動させることが防止され、旋回途中で苗載置部材５１が下降して圃場端の圃場面を荒らすことを防止できるので、圃場端に苗を植え付ける工程で苗の植付深さが乱れることが防止されると共に、旋回途中で苗を植え付けることが防止され、苗が余分に消費されることを防止できる。 According to the invention described in claim 4, in addition to the effect of the invention described in any one of claims 1 to 3, the travel operation is performed after the start of the turn travel and before the end of the turn travel is detected. When the detection member 83 and the output detection member 85 detect neutrality, the configuration is such that the turning detection member 87 is not detected, so that when the traveling vehicle body 2 is stopped during turning to replenish seedlings and fertilizers. Since it is possible to prevent the turning detection member 87 from erroneously detecting the end of turning due to engine vibration or the like, the turning interlock mechanism 89 is operated to lower the seedling placement member 51 or turn on the planting clutch device 45. Since the operation of the seedling planting device 52 is prevented and the seedling placement member 51 can be prevented from descending during turning and the field scene at the end of the field can be prevented from being damaged, planting seedlings in the process of planting seedlings at the end of the field When the depth is prevented from being disturbed To, the planting seedlings is prevented in the middle pivot, it is possible to prevent the seedling is extra consumption.

請求項５記載の発明によれば、請求項１から４の何れか１項に記載の発明の効果に加えて、エンジン２０がアイドリング状態になると、旋回検知部材８７の検知を行わない構成としたことにより、旋回途中で走行車体２を停車させて苗や肥料の補充を行う際に、エンジン２０の振動等によって旋回検知部材８７が旋回終了を誤検知することを防止できるので、旋回連動機構８９が作動して苗載置部材５１を下降させたり、植付クラッチ装置４５を入にして苗植付装置５２を作動させることが防止される。 According to the invention of claim 5, in addition to the effect of the invention of any one of claims 1 to 4, when the engine 20 is in an idling state, the turning detection member 87 is not detected. Thus, when the traveling vehicle body 2 is stopped in the middle of turning to replenish seedlings and fertilizers, the turning detection member 87 can be prevented from erroneously detecting the end of turning due to vibration of the engine 20 or the like. To prevent the seedling placement member 51 from being lowered or the seedling planting device 52 from being operated by inserting the planting clutch device 45 is prevented.

本発明の実施例の乗用型苗移植機の側面図である。It is a side view of the riding type seedling transplanter of the Example of this invention. 図１の乗用型苗移植機の平面図である。It is a top view of the riding type seedling transplanter of FIG. 図１の乗用型苗移植機のミッションケース内のギアなどの動力伝動用の構成図である。It is a block diagram for power transmissions, such as a gear in the mission case of the riding type seedling transplanter of FIG. 図１の乗用型苗移植機のミッションケース内のギア群の側面図である。It is a side view of the gear group in the mission case of the riding type seedling transplanter of FIG. 図１の乗用型苗移植機の走行レバーガイドの平面図である。It is a top view of the driving | running | working lever guide of the riding type seedling transplanting machine of FIG. 図１の乗用型苗移植機のロータ支持構造の要部側面図である。It is a principal part side view of the rotor support structure of the riding type seedling transplanter of FIG. 図１の乗用型苗移植機の一部の制御ブロック図である。It is a one part control block diagram of the riding type seedling transplanting machine of FIG.

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。
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、前進方向に向かって左右方向をそれぞれ左側、右側ということにする。 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
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.

図１及び図２は本発明を用いた一実施例である乗用型苗移植機の側面図と平面図である。この乗用型苗移植機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ている。 FIG. 1 and FIG. 2 are a side view and a plan view of a riding seedling transplanter which is an embodiment using the present invention. The riding seedling transplanter 1 has a seedling planting portion 4 mounted on the rear side of a traveling vehicle body 2 via a lifting link device 3 so as to be lifted and lowered.

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。 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.

また、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の後部上側に施肥装置５の本体部分が設けられている。
さらに、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（図示せず）を支点にして後輪ギアケース１８，１８がローリング自在に支持され、その後輪ギアケース１８，１８から外向きに突出する後輪車軸１１ａに後輪１１，１１が取り付けられている。 Further, a seedling planting portion 4 is mounted on the rear side of the traveling vehicle body 2 so as to be movable up and down via a lifting link device 3, and a main body portion of the fertilizer application device 5 is provided on the upper rear portion of the traveling vehicle body 2.
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 rolling shaft (not shown) provided horizontally in the front and rear at the center of the rear end of the main frame 15 is used as a fulcrum. The rear wheel gear cases 18 and 18 are supported in a freely rolling manner, and the rear wheels 11 and 11 are attached to a rear wheel axle 11a that protrudes outward 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、静油圧式無段変速装置（ＨＳＴ）２３など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内のトランスミッション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。 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 a hydrostatic continuously variable transmission (HST) 23 and the like. The rotational power transmitted to the mission case 12 is shifted by a transmission in the case 12 and then separated into traveling power and external power to be extracted.

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、残りが後輪ギアケース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装置４５と植付伝動軸６６（図３参照）によって苗植付部４へ伝動される。 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 the seedling planting section 4 by a planting clutch device 45 and a planting transmission shaft 66 (see FIG. 3) provided at the rear part of the traveling vehicle body 2.

エンジン２０の上部に座席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。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は多数の穴が設けられており（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。 A seat 31 is installed at the top of the engine 20. 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 left and right sides of the lower end of the front cover 32 are horizontal floor steps 35. The floor step 35 is provided with a number of holes (see FIG. 2), and mud on the shoe of the worker walking through the step 35 falls to 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を設けても良い。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。縦リンク４３は、門型の支持枠体６５よりも機体内側に設ける。 In addition, on the left and right sides of the front part of the traveling vehicle body 2, a spare seedling stage 38 on which supplementary seedlings are placed may be provided. 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. The vertical link 43 is provided on the inner side of the machine body than the gate-type support frame 65.

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、前記連結軸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４２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用油圧シリンダ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。 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 to the said centering shaft 44 so that rolling is possible.
An elevating hydraulic cylinder 46 is provided between a support member 42 fixed to the main frame 15 and a tip of a swing arm (not shown) formed integrally with the upper link 40, and the cylinder 46 is expanded and contracted hydraulically. As a result, the upper link 40 rotates 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６条植の構成で、フレームを兼ねる苗植付伝動ケース５０、マット苗を載せて左右往復動し苗を一株分ずつ各条の苗取出口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え付ける苗植付装置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６７（図１）等を備えている。 The seedling planting section 4 has a six-row planting structure, a seedling planting transmission case 50 that also serves as a frame, a mat seedling, and a left and right reciprocating motion to supply seedlings to the seedling outlets 51a,. When all the seedlings for one horizontal row are supplied to the seedling outlet 51a,..., The seedlings 51 that transfer the seedling downward by the seedling feeding belt 51b,... Are planted in the field. A seedling planting device 52,..., And a pair of left and right drawing markers 67 (FIG. 1) for drawing the aircraft course 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、その左右両側にサイドフロート５６，５６がそれぞれ設けられている。これらフロート５５，５６，５６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５５，５６，５６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５５，５６，５６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の前部の上下動がフロート傾斜角センサ（図示せず）により検出され、その検出結果に応じ前記昇降用油圧シリンダ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。 In the lower part of the seedling planting part 4, a center float 55 is provided in the center, and side floats 56, 56 are provided on the left and right sides thereof. When these floats 55, 56, 56 are grounded on the mud surface of the field, the aircraft moves forward, and the floats 55, 56, 56 slide while leveling the mud surface. Seedlings are planted by. Each of the floats 55, 56, 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 a float inclination angle sensor during planting work. The planting depth of the seedling is always maintained 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. To do.

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６５ｂと該支持枠体６５ｂの上側に設けられた支持ローラ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 mounting platform 51 has a rectangular supporting frame body 65b that supports the entire seedling planting portion 4 in the left-right direction and the up-down direction, and a support roller provided on the upper side of the supporting frame body 65b. It is the structure which slides in a direction.

施肥装置５は、肥料ホッパ６０に貯留されている粒状の肥料を繰出部６１，…によって一定量ずつ繰り出し、その肥料を施肥ホース６２，…でフロート５５，５６，５６の左右両側に取り付けた施肥ガイド（図示せず），…まで導き、施肥ガイド，…の前側に設けた作溝体６４，…によって苗植付条の側部近傍に形成される施肥溝内に落とし込むようになっている。ブロア用電動モータ５３で駆動するブロア５８で発生させたエアが、左右方向に長いエアチャンバ５９を経由して施肥ホース６２，…に吹き込まれ、施肥ホース６２，…内の肥料を風圧で強制的に搬送するようになっている。また、線引きアーム６７が機体の両側に設けられている。 The fertilizer applicator 5 feeds the granular fertilizer stored in the fertilizer hopper 60 by a certain amount by the feeding portions 61,... And applies the fertilizer to the left and right sides of the floats 55, 56, 56 with the fertilizer hoses 62,. Guided to a guide (not shown),... Is dropped into a fertilization groove formed in the vicinity of the side portion of the seedling-growing strip by a grooved body 64,. The air generated by the blower 58 driven by the blower electric motor 53 is blown into the fertilizer hoses 62,... Via the air chamber 59 that is long in the left-right direction, and the fertilizer in the fertilizer hoses 62,. It is designed to be transported. A drawing arm 67 is provided on both sides of the aircraft.

ミッションケース１２内のギアなどの動力伝動用の構成を図３に示し、ミッションケース内のギア群の側面図を図４に示す。
ミッションケース１２内には走行伝動系Ａと苗植付伝動系Ｂが設けられ、該走行伝動系Ａと苗植付伝動系Ｂにそれぞれエンジン動力を伝達する入力軸１６がミッションケース１２内のほぼ中央部に配置されている。 A configuration for power transmission such as a gear in the mission case 12 is shown in FIG. 3, and a side view of a gear group in the mission case is shown in FIG.
A traveling transmission system A and a seedling planting transmission system B are provided in the mission case 12, and an input shaft 16 for transmitting engine power to the traveling transmission system A and the seedling planting transmission system B is substantially within the mission case 12. Located in the center.

走行伝動系Ａには入力軸１６からの動力を順次伝達する中間軸２４と出力軸２５とデフギア２６を有する差動歯車機構Ｄと左右の前輪出力軸２８と、走行車体２に設けるブレーキ装置（図示省略）を操作すると後輪への駆動力の伝動を弱め、最終的に停止させる制動伝達軸２９を備えている。 The traveling transmission system A includes a differential gear mechanism D having an intermediate shaft 24, an output shaft 25, and a differential gear 26 that sequentially transmit power from the input shaft 16, left and right front wheel output shafts 28, and a brake device ( A braking transmission shaft 29 is provided that weakens the transmission of the driving force to the rear wheels when operated (not shown) and finally stops.

そして、該中間軸２４の一側端部を突出させ、前記ＨＳＴ２３の出力軸（図示省略）と直結させ、ＨＳＴ２３からの駆動力を、走行速度で伝動する第１ＨＳＴ出力ギア２４ａ、または植付作業速度で伝動する第２ＨＳＴ出力ギア２４ｂを介して出力する構成としている。該第１ＨＳＴ出力ギア２４ａ及び第２ＨＳＴ出力ギア２４ｂは中間軸２４の所定位置に、移動不能に取り付けられている。 Then, one end of the intermediate shaft 24 is protruded and directly connected to the output shaft (not shown) of the HST 23, or the first HST output gear 24a that transmits the driving force from the HST 23 at the traveling speed, or planting work It is configured to output via the second HST output gear 24b that transmits at a speed. The first HST output gear 24a and the second HST output gear 24b are attached to predetermined positions of the intermediate shaft 24 so as not to move.

さらに、出力軸２５には、前記第１ＨＳＴ出力ギア２４ａと常時噛み合う位置に第１ＨＳＴ入力ギア２５ｃを移動不能に取り付けると共に、第２ＨＳＴ出力ギア２４ｂと常時かみ合う位置に第２ＨＳＴ入力ギア２５ｂが取り付けられている。そして、該第１ＨＳＴ入力ギア２５ｃと第２ＨＳＴ入力ギア２５ｂの間には、走行車体２を走行速度と植付作業速度、及び走行系統に伝動しない走行中立に切替操作する、図１及び図２で示す副変速切替レバー９４の操作に連動して出力軸２５に沿って摺動する走行シフタ２５ｓを設ける。 Further, the first HST input gear 25c is attached to the output shaft 25 at a position where it is always meshed with the first HST output gear 24a, and a second HST input gear 25b is attached at a position where it is always meshed with the second HST output gear 24b. Yes. Then, between the first HST input gear 25c and the second HST input gear 25b, the traveling vehicle body 2 is switched to the traveling speed, the planting work speed, and the traveling neutral state not transmitted to the traveling system. A travel shifter 25 s is provided that slides along the output shaft 25 in conjunction with the operation of the auxiliary transmission switching lever 94 shown.

前記第１ＨＳＴ入力ギア２５ｃと第２ＨＳＴ入力ギア２５ｂには、各々第１キー溝２５ｋ１、第２キー溝２５ｋ２を形成し、走行シフタ２５ｓには、左右一側に第１キー爪２５ｓ１、左右他側に第２キー爪２５ｓ２を各々形成する。
該第１キー溝２５ｋ１に第１キー爪２５ｓ１が入り込むとき、前記出力軸２５は第１ＨＳＴ出力ギア２４ａと第１ＨＳＴ入力ギア２５ａの噛み合いによって回転させられ、走行車体２を走行速で走行させる。一方、該第２キー溝２５ｋ２に第２キー爪２５ｓ２が入り込むとき、前記出力軸２５は第２ＨＳＴ出力ギア２４ｂと第２ＨＳＴ入力ギア２５ｂの噛み合いによって回転させられ、走行車体２を植付作業速で走行させる。なお、第１及び第２キー爪２５ｓ１，２５ｓ２が第１及び第２キー溝２５ｋ１，２５ｋ２のどちらとも噛み合っていないときは、走行車体２の走行駆動力が遮断され、苗植付部４への伝動が確保される、走行中立状態となる。
前記走行速、植付作業速及び走行中立状態の切替操作は、走行車体２に設ける副変速切替レバー９４の操作によって行う。 The first HST input gear 25c and the second HST input gear 25b are respectively formed with a first key groove 25k1 and a second key groove 25k2, and the travel shifter 25s has a first key claw 25s1 on the left and right sides and a left and right other side. The second key claws 25s2 are formed respectively.
When the first key claw 25s1 enters the first key groove 25k1, the output shaft 25 is rotated by the meshing of the first HST output gear 24a and the first HST input gear 25a, thereby causing the traveling vehicle body 2 to travel at a traveling speed. On the other hand, when the second key claw 25s2 enters the second key groove 25k2, the output shaft 25 is rotated by the meshing of the second HST output gear 24b and the second HST input gear 25b, and the traveling vehicle body 2 is moved at the planting work speed. Let it run. When the first and second key claws 25s1, 25s2 are not meshed with either the first or second key grooves 25k1, 25k2, the traveling driving force of the traveling vehicle body 2 is interrupted, and the It is in a driving neutral state where transmission is ensured.
The switching operation of the traveling speed, the planting work speed, and the traveling neutral state is performed by operating an auxiliary transmission switching lever 94 provided on the traveling vehicle body 2.

また、前記出力軸２５には、入力軸１６に取り付けられている第３入力ギア１６ｃと噛み合い、植付駆動力を下手側に伝動する植付伝動ギア２５ａを取り付けている。該植付伝動ギア２５ａは常時第３入力ギア１６ｃと噛み合って出力軸２５を回転させ、ミッションケース１２の上手側に向かって駆動力を伝動する。なお、植付伝動は、後述する植付爪クラッチ３０によって入切する構成としている。 The output shaft 25 is fitted with a planting transmission gear 25a that meshes with the third input gear 16c mounted on the input shaft 16 and transmits the planting driving force to the lower side. The planting transmission gear 25a always meshes with the third input gear 16c to rotate the output shaft 25 and transmit the driving force toward the upper side of the transmission case 12. The planting transmission is configured to be turned on and off by a planting claw clutch 30 described later.

苗植付伝動系Ｂは、入力軸１６からの動力を順次伝達する中継軸２１と植付出力軸２２を備えている。なお、ミッションケース１２に隣接して植付伝動軸６６が配置されている。 The seedling planting transmission system B includes a relay shaft 21 and a planting output shaft 22 that sequentially transmit power from the input shaft 16. A planting transmission shaft 66 is disposed adjacent to the mission case 12.

まず、走行伝動系Ａの駆動について説明する。
走行車体（機体）２を前進させる方向に走行レバー９３を操作すると、ＨＳＴ２３の出力軸と連結された中間軸２４が正転方向に回転する。このとき、前記副変速切替レバー９４の操作位置によって、走行シフタ２５ｓの位置が異なり、第１ＨＳＴ出力ギア２４ａと第１ＨＳＴ入力ギア２５ｃと噛み合う走行速、第２ＨＳＴ出力ギア２４ｂと第２ＨＳＴ入力ギア２５ｂと噛み合う植付作業速、及び第３入力ギア１６ｃと植付伝動ギア２５ａが噛み合い、走行伝動を遮断すると共に植付駆動力のみ伝動される走行中立状態のいずれかに切り替わる。 First, driving of the traveling transmission system A will be described.
When the traveling lever 93 is operated in the direction in which the traveling vehicle body (airframe) 2 is moved forward, the intermediate shaft 24 connected to the output shaft of the HST 23 rotates in the forward rotation direction. At this time, the position of the travel shifter 25s differs depending on the operation position of the auxiliary shift switching lever 94, the travel speed meshing with the first HST output gear 24a and the first HST input gear 25c, the second HST output gear 24b and the second HST input gear 25b, The planting operation speed is engaged, and the third input gear 16c and the planting transmission gear 25a mesh with each other to switch to either the traveling neutral state where the traveling transmission is interrupted and only the planting driving force is transmitted.

このとき、出力軸２５は逆転方向に回転し、該出力軸２５よりも機体前側に位置する入力軸１６に取り付けられた第３入力ギア１６ｃが植付伝動ギア２５ａと噛み合うことにより、該入力軸１６は正転方向に回転する。また、出力軸２５よりも機体後側に位置する、デフギア２６を介して、左右前輪出力軸２８を正転方向に回転させることにより、機体が前進走行を開始する。 At this time, the output shaft 25 rotates in the reverse direction, and the third input gear 16c attached to the input shaft 16 located on the front side of the machine body with respect to the output shaft 25 meshes with the planting transmission gear 25a. 16 rotates in the forward direction. Further, by rotating the left and right front wheel output shafts 28 in the forward rotation direction via the differential gear 26 located on the rear side of the aircraft from the output shaft 25, the aircraft starts to travel forward.

また、中間軸２４の逆転時には、中間軸２４に取り付けられた第２中間ギア２４ｂと噛合する出力軸２５に取り付けられた第２出力ギア２５ｂを介して出力軸２５を正転方向に回転させる。出力軸２５のデフギア２６を介して左右の前輪出力軸２８を正転方向に回転させ、走行車体（機体）２を前進方向に走行させる。 Further, when the intermediate shaft 24 rotates in the reverse direction, the output shaft 25 is rotated in the forward rotation direction via the second output gear 25b attached to the output shaft 25 meshing with the second intermediate gear 24b attached to the intermediate shaft 24. The left and right front wheel output shafts 28 are rotated in the forward rotation direction via the differential gear 26 of the output shaft 25, so that the traveling vehicle body (airframe) 2 travels in the forward direction.

また、走行車体（機体）２を後退させる方向に走行レバー９３を操作したとき、副変速切替レバー９４が走行速または植付作業速に操作されていると、ＨＳＴ２３の駆動力を受けた中継軸２４は逆転方向に回転し、第１ＨＳＴ出力ギア２４ａと第１ＨＳＴ入力ギア２５ｃが噛み合う、または第２ＨＳＴ出力ギア２４ｂと第２ＨＳＴ入力ギア２５ｂが噛み合い、出力軸２５が正転方向に回転する。 In addition, when the travel lever 93 is operated in the direction in which the traveling vehicle body (airframe) 2 is moved backward, if the auxiliary transmission switching lever 94 is operated at the traveling speed or the planting work speed, the relay shaft that has received the driving force of the HST 23. 24 rotates in the reverse rotation direction, and the first HST output gear 24a and the first HST input gear 25c mesh with each other, or the second HST output gear 24b and the second HST input gear 25b mesh with each other, and the output shaft 25 rotates in the normal rotation direction.

そして、前記植付伝動ギア２５ａと第３入力ギア１６ｃが噛み合うことにより、入力軸１６は逆転方向に回転すると共に、デフギア２６を介して左右前輪出力軸２８を逆転方向に回転させることにより、機体が後進走行を開始する。 When the planting transmission gear 25a and the third input gear 16c are engaged with each other, the input shaft 16 rotates in the reverse rotation direction, and the left and right front wheel output shafts 28 are rotated in the reverse rotation direction via the differential gear 26. Starts reverse travel.

次に、走行レバー９３の操作によりＨＳＴ２３の出力軸（図示せず）の逆転に対応させて入力軸１６を走行車体（機体）２が後進する方向に回転させると、入力軸１６は逆転方向に回転し、入力軸１６に固着した第３入力ギア１６ｃと噛合する植付伝動ギア２５ａを介して出力軸２５を正転方向に回動させる。出力軸２５の正転でデフギア２６を有する差動歯車機構Ｄを介して左右の前輪出力軸２８を逆転方向、すなわち走行車体（機体）２の後退方向に回転させる。 Next, when the input shaft 16 is rotated in the reverse direction of the traveling vehicle body (airframe) 2 in accordance with the reverse rotation of the output shaft (not shown) of the HST 23 by the operation of the travel lever 93, the input shaft 16 is rotated in the reverse rotation direction. The output shaft 25 is rotated in the forward rotation direction via the planting transmission gear 25a that rotates and meshes with the third input gear 16c fixed to the input shaft 16. By rotating the output shaft 25 in the forward direction, the left and right front wheel output shafts 28 are rotated in the reverse direction, that is, in the backward direction of the traveling vehicle body (machine body) 2 via the differential gear mechanism D having the differential gear 26.

次に苗植付伝動系Ｂの駆動について説明する。
走行レバー９３の前記走行車体（機体）２を後退させる方向への操作により連動部材（ワイヤ）６８を介してシフタ４８をはじめとする切替装置（シフタ４８と該シフタ４８の回動操作に連動して回転するスライダ６３と、スライダ６３の回転で入力軸１６上を摺動するキー６９からなる）を作動させて、キー６９を入力軸１６の第１入力ギア１６ａに係合させる。 Next, driving of the seedling planting transmission system B will be described.
When the travel lever 93 is operated in the direction in which the travel vehicle body (airframe) 2 is moved backward, the switching device including the shifter 48 (the shifter 48 and the rotation operation of the shifter 48 is interlocked) via the interlocking member (wire) 68. The key 69 is engaged with the first input gear 16 a of the input shaft 16 by actuating the slider 63 rotating and the key 69 sliding on the input shaft 16 by the rotation of the slider 63.

キー６９が第１入力ギア１６ａに嵌まると、車体２を後退させる方向である入力軸１６は逆回転方向に回転しているので、入力軸１６の駆動力はカウンタ軸１７のカウンタギア１７ａを正回転させた後、中継軸２１の第１中継ギア２１ａを逆回転させる。中継軸２１の前記逆回転は、中継軸２１に固着した第３中継ギア２１ｃ又は第４中継ギア２１ｄを逆回転方向に駆動させ、該第３中継ギア２１ｃ又は第４中継ギア２１ｄと噛合する植付出力軸２２の第１植付伝動ギア２２ａ又は第２植付伝動ギア２２ｂを介して植付出力軸２２を正方向に駆動させる。植付出力軸２２の回転方向が正回転であるので、植付伝動軸６６を介して苗植付装置５２が正転し、苗の植付が可能となる。 When the key 69 is fitted into the first input gear 16a, the input shaft 16, which is the direction in which the vehicle body 2 is retracted, rotates in the reverse rotation direction, so that the driving force of the input shaft 16 causes the counter gear 17a of the counter shaft 17 to move. After the forward rotation, the first relay gear 21a of the relay shaft 21 is reversely rotated. The reverse rotation of the relay shaft 21 drives the third relay gear 21c or the fourth relay gear 21d fixed to the relay shaft 21 in the reverse rotation direction and meshes with the third relay gear 21c or the fourth relay gear 21d. The planting output shaft 22 is driven in the forward direction via the first planting transmission gear 22a or the second planting transmission gear 22b of the planting output shaft 22. Since the rotation direction of the planting output shaft 22 is normal rotation, the seedling planting device 52 rotates forward via the planting transmission shaft 66, and seedlings can be planted.

なお、植付出力軸２２の第１植付伝動ギア２２ａ又は第２植付伝動ギア２２ｂは互いに径が異なり、植付出力軸２２の軸上を株間変速機構（図示省略）の操作によってスライドし、また第１植付伝動ギア２２ａと第２植付伝動ギア２２ｂはそれぞれ中継軸２１の第３中継ギア２１cと第４中継ギア２１ｄとそれぞれ噛合可能であり、それぞれのギア同士の噛合で植付伝動軸６６を介しての苗植付装置５２の回転速度が２段階に調整できる。 The first planting transmission gear 22a or the second planting transmission gear 22b of the planting output shaft 22 have different diameters, and slides on the shaft of the planting output shaft 22 by an operation of an inter-plant transmission mechanism (not shown). Further, the first planting transmission gear 22a and the second planting transmission gear 22b can mesh with the third relay gear 21c and the fourth relay gear 21d of the relay shaft 21, respectively, and can be planted by meshing between the gears. The rotational speed of the seedling planting device 52 through the transmission shaft 66 can be adjusted in two stages.

また、このとき、入力軸１６の第２入力ギア１６ｂにはキー６９が入力しないので、第２入力ギア１６ｂはフリー回転しており、第２入力ギア１６ｂを経由しての入力軸１６からの中継軸２１への動力伝達は無い。 At this time, since the key 69 is not input to the second input gear 16b of the input shaft 16, the second input gear 16b rotates freely, and the input shaft 16 from the input shaft 16 via the second input gear 16b rotates. There is no power transmission to the relay shaft 21.

次に、走行レバー９３の走行車体（機体）２を前進させる方向への操作により、図３のミッションケース１２の外側の丸枠内に示すように、連動部材（ワイヤ）６８を介してシフタ４８をはじめとする切替装置（４７、４８、６９）の作動でキー６９を入力軸１６の第２入力ギア１６ｂに係合させる。 Next, when the traveling lever 93 is operated in the direction in which the traveling vehicle body (airframe) 2 is moved forward, the shifter 48 is connected via an interlocking member (wire) 68 as shown in a round frame outside the mission case 12 in FIG. The key 69 is engaged with the second input gear 16b of the input shaft 16 by the operation of the switching device (47, 48, 69) including the above.

キー６９が入力軸１６の第２入力ギア１６ｂに係合するときは、第１入力ギア１６ａはフリー回転する。また、入力軸１６が前記したように正転方向に回転しているので、第２入力ギア１６ｂの駆動力は第２入力ギア１６ｂに噛合する第２中継ギア２１ｂにより中継軸２１を逆回転させる。 When the key 69 is engaged with the second input gear 16b of the input shaft 16, the first input gear 16a rotates freely. Since the input shaft 16 rotates in the forward direction as described above, the driving force of the second input gear 16b causes the relay shaft 21 to reversely rotate by the second relay gear 21b meshing with the second input gear 16b. .

中継軸２１の前記逆回転は、中継軸２１に固着した第３中継ギア２１ｃ又は第４中継ギア２１ｄを逆回転方向に駆動させ、該第３中継ギア２１ｃ又は第４中継ギア２１ｄと噛合する植付出力軸２２の第１植付伝動ギア２２ａ又は第２植付伝動ギア２２ｂを介して植付出力軸２２を正方向に駆動させる。植付出力軸２２の回転方向が正回転であるので、植付伝動軸６６を介して苗植付装置５２が正転し、苗の植付が可能となる。 The reverse rotation of the relay shaft 21 drives the third relay gear 21c or the fourth relay gear 21d fixed to the relay shaft 21 in the reverse rotation direction and meshes with the third relay gear 21c or the fourth relay gear 21d. The planting output shaft 22 is driven in the forward direction via the first planting transmission gear 22a or the second planting transmission gear 22b of the planting output shaft 22. Since the rotation direction of the planting output shaft 22 is normal rotation, the seedling planting device 52 rotates forward via the planting transmission shaft 66, and seedlings can be planted.

なお、植付クラッチ装置４５はクラッチ切りピン４７と植付クラッチ爪３０とスプリング５７を備えた構成である。すなわち、植付クラッチ装置４５には植付出力軸２２を常時植付伝動軸６６とは反対側に付勢する植付クラッチ爪３０とクラッチ切ピン４７があり、植付クラッチ爪３０は植付出力軸２２の外周に装着され、該植付クラッチ爪３０の外周には軸方向に傾斜した傾斜面を形成し、さらに該傾斜面にクラッチ切りピン４７が押圧可能に配置されている。該植付クラッチ爪３０の傾斜面はクラッチ切りピン４７が押圧されると植付クラッチ爪３０が植付出力軸２２をスライドしてクラッチが外れるような傾斜面が形成されている。また、植付クラッチ爪３０を植付出力軸２２上で摺動させて該植付クラッチ爪３０と一体の第１植付伝動ギア２２ａ又は第２植付伝動ギア２２ｂと第３中継ギア２１ｃ又は第４中継ギア２１ｄとの係合を入り切りする方向に付勢又は付勢解除することができるスプリング５７を植付出力軸２２の外周に設けている。 The planting clutch device 45 includes a clutch cutting pin 47, a planting clutch pawl 30, and a spring 57. That is, the planting clutch device 45 has a planting clutch pawl 30 and a clutch disengagement pin 47 that constantly bias the planting output shaft 22 to the side opposite to the planting transmission shaft 66. The planting clutch pawl 30 is planted. Mounted on the outer periphery of the output shaft 22, an inclined surface inclined in the axial direction is formed on the outer periphery of the planting clutch pawl 30, and a clutch cutting pin 47 is disposed on the inclined surface so as to be pressed. The inclined surface of the planting clutch pawl 30 is formed such that when the clutch cut pin 47 is pressed, the planting clutch pawl 30 slides the planting output shaft 22 and the clutch is released. Also, the planting clutch pawl 30 is slid on the planting output shaft 22 so that the first planting transmission gear 22a or the second planting transmission gear 22b and the third relay gear 21c integrated with the planting clutch pawl 30 or A spring 57 is provided on the outer periphery of the planting output shaft 22 that can be urged or released in a direction in which the engagement with the fourth relay gear 21d is turned on and off.

従って、植付伝動軸６６にエンジン動力を伝達させたくないときには、クラッチ切りピン４７の押圧により植付クラッチ爪３０を植付伝動軸６６側にスライドさせて、植付出力軸２２へのエンジン動力の伝達を解除させる。 Therefore, when it is not desired to transmit the engine power to the planting transmission shaft 66, the planting clutch pawl 30 is slid toward the planting transmission shaft 66 by the pressing of the clutch cut pin 47, and the engine power to the planting output shaft 22 is determined. To cancel the transmission.

上記構成により走行車体２を後進操作すると、正逆転伝動機構１９が植付伝動軸６６を逆転させることにより、後進時に苗植付装置５２は正転方向に動き続けることができるので、植付クラッチ装置４５が切れなくても、植付クラッチ装置４５や苗植付装置５２が破損することが防止される。 When the traveling vehicle body 2 is reversely operated with the above configuration, the forward / reverse transmission mechanism 19 reverses the planting transmission shaft 66, so that the seedling planting device 52 can continue to move in the forward rotation direction during backward travel. Even if the device 45 is not cut off, the planting clutch device 45 and the seedling planting device 52 are prevented from being damaged.

また、植付クラッチ装置４５が切れて苗植付部４の駆動が停止すると、苗植付装置５２が停止位置で停止するので、植付再開時に同じ苗の前後間隔（株間）を取ることができ、苗の植付精度が従来技術より向上する。 Further, when the planting clutch device 45 is disconnected and the driving of the seedling planting unit 4 is stopped, the seedling planting device 52 is stopped at the stop position, so that the same seedling front-rear interval (between plants) can be taken when planting is resumed. This improves the planting accuracy of the seedling compared to the prior art.

なお、苗植付装置５２の前記停止位置は、各植付伝動軸６６に設けられている一対の植込杆５２ａが土壌内に無い位置で、これにより土の付着により植込杆５２ａが苗を取れなくなることを防止することができる。すなわち、植込杆５２ａが正転時には、図示しないロータリケース内の偏心ギアの形状により、植付クラッチ装置４５を切ったとき、苗を植え付ける２つの植込杆５２ａは所定の停止位置で止まる構造となっているためである。これにより、植付クラッチ装置４５を入にした際、それまでの苗の植付前後間隔（株間）が維持されるので、作業条における植付開始位置や植付終了位置が乱れにくくなり、植付が必要な箇所に苗が植え付けられないことが防止される。 In addition, the said stop position of the seedling planting apparatus 52 is a position where a pair of planting pot 52a provided in each planting transmission shaft 66 does not exist in soil, and by this, the planting pot 52a becomes seedling by adhesion of soil. Can be prevented. That is, when the planting basket 52a is rotated forward, the two planting baskets 52a for planting seedlings stop at a predetermined stop position when the planting clutch device 45 is cut off due to the shape of the eccentric gear in the rotary case (not shown). This is because. As a result, when the planting clutch device 45 is turned on, the planting interval before and after planting (between the plants) is maintained, so that the planting start position and planting end position in the working line are less likely to be disturbed. It is prevented that seedlings are not planted in places where attachment is necessary.

さらに、この２つの植込杆５２ａの停止位置は、両方の植込杆の苗取フォークが土壌内に進入していない状態なので、苗取フォークの苗取空間部に泥が溜まって苗が取れなくなることや、苗取フォークが抵抗で歪んだりすることが防止される。 Further, the stop positions of the two planting pods 52a are in a state in which the seedling forks of both planting baskets have not entered the soil, so that mud accumulates in the seedling space of the seedling fork and the seedlings can be removed. It is prevented that the seedling fork disappears and the seedling fork is distorted by resistance.

また、走行レバー９３による走行車体２の前進操作では正転駆動する入力軸１６からの動力を植付伝動軸６６では正転させて、走行レバー９３による走行車体２の後進操作では逆転駆動する入力軸１６からの動力を植付伝動軸６６では正転させる苗植付伝動系Ｂをミッションケース１２内に設けているので、走行車体２の前進又は後進に拘わらず、苗植付装置５２を正転駆動できるので苗の植付操作性が従来技術に比較して向上する。 Further, in the forward operation of the traveling vehicle body 2 by the traveling lever 93, the power from the input shaft 16 that rotates forward is rotated forward by the planting transmission shaft 66, and in the backward operation of the traveling vehicle body 2 by the traveling lever 93, the input is driven reversely. Since the seedling planting transmission system B in which the power from the shaft 16 is forwardly rotated by the planting transmission shaft 66 is provided in the mission case 12, the seedling planting device 52 can be moved forward or backward regardless of whether the traveling vehicle body 2 moves forward or backward. Since it can be rolled, the planting operability of the seedling is improved as compared with the conventional technology.

さらに、図５に示すように、走行レバー９３を後進域に操作する前に、走行レバーガイド４９の中立域Ｎの操作空間部Ｐに走行レバー９３を操作した際に、正逆転伝動機構１９が作動することにより、走行車体２の前進又は後進用の動力伝動系が切り替えられた後に植付伝動軸６６に駆動力が伝動されるので、駆動力が伝動され始めてから動力伝動系の伝動経路が切り替わるまでに負荷が生じることが防止され、負荷による走行車体２、特にミッションケース１２内の動力伝動系Ａ、Ｂの破損や耐久性の低下が防止される。 Further, as shown in FIG. 5, when the traveling lever 93 is operated in the operation space portion P in the neutral region N of the traveling lever guide 49 before the traveling lever 93 is operated to the reverse region, the forward / reverse transmission mechanism 19 is Since the driving force is transmitted to the planting transmission shaft 66 after the forward or reverse power transmission system of the traveling vehicle body 2 is switched by operating, the transmission path of the power transmission system is changed after the driving force starts to be transmitted. It is prevented that a load is generated before switching, and damage to the traveling vehicle body 2, particularly the power transmission systems A and B in the transmission case 12 due to the load, and a decrease in durability are prevented.

図６にロータ支持構造の要部側面図を示す。ロータ支持構造には、苗載台５１の支持枠体６５に上端が回動自在に支持されるロータ上下動アーム８１が取り付けられている。該ロータ上下動アーム８１の下端は後述する第２整地回動アーム７５ｂに図示しない連結部材を介して回動自在に支持されている。 FIG. 6 shows a side view of the main part of the rotor support structure. The rotor support structure is provided with a rotor vertical movement arm 81 whose upper end is rotatably supported by the support frame 65 of the seedling stage 51. The lower end of the rotor vertical movement arm 81 is rotatably supported by a second leveling rotation arm 75b described later via a connecting member (not shown).

ロータ上下動アーム８１は、支持枠体６５に設けられ、機体左側の第２回動アーム７５ｂに下端部を取り付けている。これにより、ギア８０が動くと、ロータ上下動アーム８１が上下動する。センターロータ２７ｂの吊下げスプリング７８は、左側のロータ伝動ケース７３の前側に設けるステーと、ロータ上下動アーム８１の上部に設けるステーとの間に設ける。ロータ上下動アーム８１側には複数のステーがあり、選択して取り付ける。 The rotor vertical movement arm 81 is provided on the support frame 65 and has a lower end attached to the second rotating arm 75b on the left side of the machine body. Accordingly, when the gear 80 moves, the rotor vertical movement arm 81 moves up and down. The suspension spring 78 of the center rotor 27 b is provided between a stay provided on the front side of the left rotor transmission case 73 and a stay provided on the top of the rotor vertical movement arm 81. There are a plurality of stays on the rotor vertical movement arm 81 side, which are selected and attached.

これら吊下げスプリング７８、上下動アクチュエータ７９、ギア８０、ロータ上下動アーム８１などを整地上下動装置７７という。
ロータ上下動アーム８１を上下動させる上下動アクチュエータ７９は、苗植付部４の昇降操作や、苗植付部４が自動上昇する旋回時、または後進時に作動し、苗植付部４の上下動に合わせて整地ロータ２７の上下位置を自動的に変える。また、植付作業（直進走行）中は、操縦部に設けるダイヤル等を操作すると上下動アクチュエータ７９が作動して整地ロータ２７を任意の高さに設定できる。 The suspension spring 78, the vertical motion actuator 79, the gear 80, the rotor vertical motion arm 81, and the like are referred to as a leveling vertical motion device 77.
The vertical movement actuator 79 that moves the rotor vertical movement arm 81 up and down is operated when the seedling planting unit 4 is moved up and down, or when the seedling planting unit 4 is automatically turned up or reverse, and the seedling planting unit 4 is moved up and down. The vertical position of the leveling rotor 27 is automatically changed according to the movement. Further, during planting work (straight traveling), when a dial or the like provided in the control unit is operated, the vertical movement actuator 79 is activated and the leveling rotor 27 can be set to an arbitrary height.

旋回時や後進時は、整地ロータ２７が圃場面に接近した状態で機体が移動すると、整地ロータ２７が圃場面を荒らす可能性があるので、苗植付部４の上昇が始まると同時に上下動アクチュエータ７９が作動し、ロータ上下動アーム８１を上昇させる。すると、機体左側のサイドロータ２７ａが持ち上げられ、整地支持フレーム７６を回動中心として右側のサイドロータ２７ａが持ち上がると共に、左右のロータ伝動ケース７３，７３を介してセンターロータ２７ｂが持ち上がる。このとき、センターロータ２７ｂが上昇しすぎると下側のリンクアーム４１を歪めるので、スプリング７８の取付ステー近傍に設ける接触ローラ（図示せず）がリンクアーム４１に接触し、センターロータ２７ｂがサイドロータ２７ａよりも下方に位置する姿勢とする。 When turning or moving backward, if the aircraft moves with the leveling rotor 27 approaching the field scene, the leveling rotor 27 may cause the field scene to be damaged. The actuator 79 operates to raise the rotor vertical movement arm 81. Then, the left side rotor 27a is lifted, the right side rotor 27a is lifted around the leveling support frame 76, and the center rotor 27b is lifted via the left and right rotor transmission cases 73, 73. At this time, if the center rotor 27b is raised too much, the lower link arm 41 is distorted. Therefore, a contact roller (not shown) provided in the vicinity of the mounting stay of the spring 78 contacts the link arm 41, and the center rotor 27b becomes the side rotor. The posture is positioned below 27a.

一方、整地ロータ２７の下降の際は、苗植付部４の下降段階に合わせて下降し、遅くとも苗植付部４が作業高さまで下降し、苗の植付が開始される段階で整地ロータ２７が圃場面を均し始めるよう下降させる。（整地ロータ２７への伝動は、伝動シャフト７２を介して行うが、苗植付部４を非作業高さ（約３０ｃｍ程度）まで上昇させると伝動が切れ、下降させると伝動が繋がる構成としている。）
つまり、従来構成のように、苗植付部４の上下動に伴い整地ロータ２７も上下動するが、従来構成は機械的な構成により苗植付部４を所定高さまで上昇又は下降すると整地ロータ２７が連動して上昇又は下降していたのに対し、本実施例では苗植付部４を所定高さまで上昇又は下降させると、制御装置１００が上下動アクチュエータ７９を作動させて整地ロータ２７を上昇／下降させる構成となっている。 On the other hand, when the leveling rotor 27 is lowered, the leveling rotor 27 is lowered in accordance with the lowering stage of the seedling planting unit 4, and at the latest the seedling planting unit 4 is lowered to the working height and the seedling planting is started at the stage where seedling planting is started. Lower 27 so that it begins to level the field. (Transmission to the leveling rotor 27 is performed via the transmission shaft 72. However, when the seedling planting portion 4 is raised to a non-working height (about 30 cm), the transmission is cut off, and when lowered, the transmission is connected. .)
That is, as in the conventional configuration, the leveling rotor 27 also moves up and down as the seedling planting unit 4 moves up and down. However, in the conventional configuration, when the seedling planting unit 4 is raised or lowered to a predetermined height by a mechanical configuration, the leveling rotor In the present embodiment, when the seedling planting part 4 is raised or lowered to a predetermined height, the control device 100 operates the vertical movement actuator 79 to move the leveling rotor 27. It is configured to raise / lower.

また、図７には本実施例に関係する制御ブロック図を示す。図７に示す通り、走行レバー９３の操作量から走行車体２の前後進状態及び中立状態又はアイドリング状態を検知する走行レバーポテンショメータ８３を設け、ＨＳＴ（油圧式無段変速装置）２３に設けられたトラニオンアーム８４の回動量から前後進及び中立を検知する出力ポテンショメータ８５を設け、走行車体２の旋回操作を検知する旋回検知部材である左右の後輪回転センサ（旋回内側と外側の回転数の差で旋回か否かを判断する。）８７を設け、該後輪回転センサ８７が旋回の開始を検知すると苗載置部材５１を上昇させ、旋回の終了を検知すると苗載置部材５１を下降させると共に植付クラッチ装置４５を入にする旋回連動機構８９を設け、後輪回転センサ８７が旋回の開始を検知した後、旋回の終了を検知する前に走行レバーポテンショメータ８３と出力ポテンショメータ８５のいずれか一方、または両方が中立を検知しているときは、後輪回転センサ８７の検知を行わない構成とした。 FIG. 7 shows a control block diagram related to this embodiment. As shown in FIG. 7, a travel lever potentiometer 83 that detects the forward / backward travel state, the neutral state or the idling state of the travel vehicle body 2 from the operation amount of the travel lever 93 is provided, and is provided in the HST (hydraulic continuously variable transmission) 23. An output potentiometer 85 that detects forward / backward movement and neutrality from the amount of rotation of the trunnion arm 84 is provided, and left and right rear wheel rotation sensors that are turning detection members that detect turning operation of the traveling vehicle body 2 (difference between the number of rotations inside and outside the turning). 87) is provided, and when the rear wheel rotation sensor 87 detects the start of turning, the seedling placing member 51 is raised, and when the end of turning is detected, the seedling placing member 51 is lowered. In addition, a turning interlocking mechanism 89 for turning the planting clutch device 45 on is provided, and after the rear wheel rotation sensor 87 detects the start of turning, the travel lever before detecting the end of turning. Either one of Tenshometa 83 and the output potentiometer 85, or when both are detected neutrality was configured not to perform the detection of the rear wheel rotation sensor 87.

上記制御構成により、旋回走行が開始された後、旋回走行の終了が検知される前に走行レバーポテンショメータ８３と出力ポテンショメータ８５が中立を検知したときは、後輪回転センサ８７の検知を行わない構成としたことにより、旋回途中で苗や肥料の補充を行う際にエンジンの振動等によって後輪回転センサ８７が旋回終了を誤検知することを防止できるので、旋回連動機構８９が作動して苗載置部材５１を下降させたり、植付クラッチ装置４５を入にして苗植付装置５２を作動させることが防止される。 With the above control configuration, when the traveling lever potentiometer 83 and the output potentiometer 85 detect neutrality after the start of turning and before the end of turning is detected, the rear wheel rotation sensor 87 is not detected. As a result, it is possible to prevent the rear wheel rotation sensor 87 from erroneously detecting the end of the turn due to engine vibration or the like when the seedling or fertilizer is replenished during the turn, so that the turn interlocking mechanism 89 is activated and the seedling is loaded. It is possible to prevent the placement member 51 from being lowered or the seedling planting device 52 from being operated with the planting clutch device 45 turned on.

これにより、旋回途中で苗載置部材５１が下降して圃場端の圃場面を荒らすことを防止できるので、圃場端に苗を植え付ける工程で苗の植付深さが乱れることが防止されると共に、旋回途中で苗を植え付けることが防止され、苗が余分に消費されることを防止できる。 As a result, the seedling placement member 51 can be prevented from descending during turning and the field scene at the field end can be prevented from being disturbed, so that the planting depth of the seedling can be prevented from being disturbed in the process of planting the seedling at the field end. It is possible to prevent seedlings from being planted during turning, and to prevent the seedlings from being consumed excessively.

また、出力ポテンショメータ８５が所定時間以上中立を検知する場合又は走行レバー９３の操作位置がアイドリング位置にあることを走行レバーポテンショメータ８３が検知すると、エンジン２０を停止させる（正確には、エンジンの回転数を再起動可能な最低回転数に低下させる）アイドリング機構９０と、該アイドリング機構（９０）の作動を検知するアイドリング検知部材９１を設け、アイドリング検知部材９１が検知状態になると、左右の後輪回転センサ８７による旋回検知を行わない制御機構を制御装置１００に設けている。 Further, when the output potentiometer 85 detects neutrality for a predetermined time or more or when the travel lever potentiometer 83 detects that the operation position of the travel lever 93 is at the idling position, the engine 20 is stopped (more precisely, the engine speed). The idling mechanism 90 and the idling detection member 91 for detecting the operation of the idling mechanism (90) are provided. When the idling detection member 91 is in the detection state, the left and right rear wheels rotate. A control mechanism that does not detect turning by the sensor 87 is provided in the control device 100.

こうして、エンジン２０がアイドリング状態になると、左右の後輪回転センサ８７による検知を行わない構成としたことにより、旋回途中で苗や肥料の補充を行う際にエンジン２０の振動等によって後輪回転センサ８７が旋回終了を誤検知することを防止できるので、旋回連動機構８９が作動して苗載置部材５１を下降させたり、植付クラッチ装置４５を入にして苗植付装置５２を作動させることが防止される。 Thus, when the engine 20 is in the idling state, the left and right rear wheel rotation sensors 87 do not detect the rear wheel rotation sensor 87, so that when the seedling or fertilizer is replenished during turning, the rear wheel rotation sensor is caused by vibration of the engine 20 or the like. Since it is possible to prevent 87 from erroneously detecting the end of turning, the turning interlock mechanism 89 is actuated to lower the seedling placement member 51, or the seedling planting device 52 is actuated by inserting the planting clutch device 45. Is prevented.

１施肥装置付き乗用型苗移植機２走行車体
３昇降リンク装置４苗植付部
５施肥装置
１０前輪１１後輪
１１ａ後輪駆動軸１２ミッションケース
１３前輪ファイナルケース１４畦クラッチレバー
１５メインフレーム１６入力軸
１７カウンタ軸１８後輪ギアケース
１８ａ伝動シャフト１９正逆転伝動機構
２０エンジン２１中継軸
２２植付出力軸２３静油圧式無段変速装置（ＨＳＴ）
２４中間軸２５出力軸
２６デフギア２７（２７ａ，２７ｂ）整地ロータ
２８前輪出力軸２９制動伝達軸
３０植付クラッチ爪３１座席
３２フロントカバー３３操縦部
３４ハンドル３５フロアステップ
３６リヤステップ３７ロータカバー
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植付クラッチ装置４６昇降用油圧シリンダ
４７クラッチ切ピン４８シフタ
４９走行レバーガイド
５０苗植付伝動ケース５１苗載台
５１ａ苗取出口５１ｂ苗送りベルト
５２苗植付装置５３ブロア用電動モータ
５５センターフロート５６サイドフロート
５７スプリング５８ブロア
５９エアチャンバ
６０肥料ホッパ６１繰出部
６２施肥ホース６３スライダ
６４作溝体６５苗植付部支持枠体
６６植付伝動軸６７線引きマーカ
６８ワイヤ６９キー
７０（７０ａ，７０ｂ）ロータ駆動軸
７２整地伝動シャフト
７３ロータ伝動ケース７５整地回動アーム
７６整地支持フレーム７７整地上下動装置
７８スプリング７９ロータ上下動モータ
８０扇形ギア８１ロータ上下動アーム
８３走行レバーポテンショメータ
８４トラニオンアーム８５出力ポテンショメータ
８７旋回検知部材（後輪回転センサ）
８９旋回連動機構９０アイドリング機構
９１アイドリング検出部材９３走行レバー
９４副変速切替レバー１００制御装置
Ａ走行伝動系
Ｂ苗植付伝動系
Ｄ差動歯車機構 DESCRIPTION OF SYMBOLS 1 Riding type seedling transplanter with fertilizer application 2 Traveling vehicle body 3 Elevating link device 4 Seedling planting part 5 Fertilizer 10 Front wheel 11 Rear wheel 11a Rear wheel drive shaft 12 Mission case 13 Front wheel final case 14 畦 Clutch lever 15 Main frame 16 Input Shaft 17 Countershaft 18 Rear wheel gear case 18a Transmission shaft 19 Forward / reverse transmission mechanism 20 Engine 21 Relay shaft 22 Planting output shaft 23 Hydrostatic continuously variable transmission (HST)
24 Intermediate shaft 25 Output shaft 26 Differential gear 27 (27a, 27b) Leveling rotor 28 Front wheel output shaft 29 Braking transmission shaft 30 Planting clutch pawl 31 Seat 32 Front cover 33 Control section 34 Handle 35 Floor step 36 Rear step 37 Rotor cover 38 Preliminary Seedling stage 40 Upper link 41 Lower link 42 Link base frame 43 Vertical link 44 Connecting shaft 45 Planting clutch device 46 Elevating hydraulic cylinder
47 Clutch disconnection pin 48 Shifter 49 Travel lever guide 50 Seedling planting transmission case 51 Seedling stand 51a Seedling outlet 51b Seedling feed belt 52 Seedling planting device 53 Blower electric motor 55 Center float 56 Side float 57 Spring 58 Blower 59 Air Chamber 60 Fertilizer hopper 61 Feeding part 62 Fertilization hose 63 Slider 64 Groove body 65 Seedling planting part support frame body 66 Planting transmission shaft 67 Drawing marker 68 Wire 69 Key 70 (70a, 70b) Rotor drive shaft 72 Leveling transmission shaft 73 Rotor transmission case 75 Leveling rotation arm 76 Leveling support frame 77 Leveling vertical movement device 78 Spring 79 Rotor vertical movement motor 80 Fan gear 81 Rotor vertical movement arm 83 Travel lever potentiometer 84 Trunnion arm 85 Output potentiometer 87 Times detecting member (rear wheel rotation sensor)
89 Turning interlocking mechanism 90 Idling mechanism 91 Idling detecting member 93 Traveling lever 94 Sub-shifting lever 100 Controller A Traveling transmission system B Seedling transmission system D Differential gear mechanism

Claims

A traveling vehicle body (2) provided with traveling wheels (10, 11), an engine (20), and a control unit (33);
Missions equipped with a traveling transmission system (A) and a seedling planting transmission system (B) for transmitting the power from the engine (20) to the traveling wheels (10, 11) and the seedling planting section (4), respectively. Case (12);
A traveling lever (93) for performing a traveling operation of the traveling vehicle body (2);
A seedling placement member (51) for loading seedlings, a seedling planting device (52) for taking seedlings from the seedling placement member (51) and planting them in the field, and a seedling planting transmission system to the seedling planting device (52) ( In a seedling transplanting machine equipped with a seedling planting part (4) having a planting clutch device (45) for turning on and off the driving force from B),
A planting transmission shaft (66) for transmitting the driving force from the seedling planting transmission system (B) to the seedling placement member (51) of the seedling planting unit (4) and the seedling planting device (52); ,
A seedling transplanter provided with a forward / reverse transmission mechanism (19) for reversing the planting transmission shaft (66) when the travel lever (93) is operated backward.

A hydraulic continuously variable transmission (23) is provided between the driving transmission system (A) and the seedling planting transmission system (B) in the engine (20) and the transmission case (12),
A forward / reverse transmission mechanism (19) is provided on the planting transmission shaft (66),
The forward / reverse transmission mechanism (19) has an input shaft (16) connected to the hydraulic continuously variable transmission (23) and a relay through which the driving force of the input shaft (16) is transmitted via the counter shaft (17). A planting output shaft (22) to which the driving force of the shaft (21) and the relay shaft (21) is transmitted;
A first input gear (16a) that is driven only when there is an input from a key (69) provided on the input shaft (16) is provided on the input shaft (16),
A counter gear (17a) that always meshes with the first input gear (16a) is provided on the counter shaft (17),
The relay shaft (21) is provided with a first relay gear (21a) that always meshes with the counter gear (17a),
A second input gear (16b) that is driven only when the key (69) is input is provided on the input shaft (16);
The relay shaft (21) is provided with a second relay gear (21b) that always meshes with the second input gear (16b),
The third relay transmission gear (21c) and the fourth relay transmission gear (21d) are provided on the relay shaft (21),
A first planting transmission gear (22a) and a second planting transmission gear (22b) meshing with either the third relay transmission gear (21c) or the fourth relay transmission gear (21d) are planted output shafts (22). Slidably provided on the axis
A switching device (47) that switches the rotation direction of the relay shaft (21) by switching the key (69) to either the first input gear (16a) or the second input gear (16b) of the input shaft (16). 48, 69),
The seedling transplanter according to claim 1, wherein the traveling lever (93) and the switching device (47, 48, 69) are connected by an interlocking member (68).

A neutral zone (N) for stopping the output of the hydraulic continuously variable transmission (23) is set in the running lever guide (49) by operating the running lever (93), and the neutral zone of the running lever guide (49) is set. In (N), an operation space portion (P) capable of operating the travel lever (93) to the side of the machine body is formed,
When the travel lever (93) is operated in the operation space (P), the interlocking member (68) operates the switching device (47, 48, 69) to reverse the rotation direction of the planting transmission shaft (66). The seedling transplanting machine according to claim 1 or 2, wherein

A travel operation detection member (83) is provided for detecting the forward / backward travel state and the neutral state or idling state of the travel vehicle body (2) from the operation amount of the travel lever (93).
An output detection member (85) is provided for detecting forward / reverse travel and neutrality from the rotation amount of the trunnion arm (84) provided in the hydraulic continuously variable transmission (23),
A turning detection member (87) for detecting a turning operation of the traveling vehicle body (2) is provided;
When the turning detection member (87) detects the start of turning, the seedling placement member (51) is raised, and when the end of turning is detected, the seedling placement member (51) is lowered and the planting clutch device (45) is turned on. A turning interlocking mechanism (89) is provided,
After the turning detection member (87) detects the start of turning and before the end of turning is detected, one or both of the traveling operation detection member (83) and the output detection member (85) detect neutrality. The seedling transplanting machine according to any one of claims 1 to 3, wherein the turning detection member (87) is not detected when the turning detection member is present.

When the travel operation detection member (83) or the output detection member (85) that detects that the operation position of the travel lever (93) is at the idling position detects neutrality for a predetermined time or more, or the operation of the travel lever (93) When the traveling operation detecting member (83) detects that the position is at the idling position, an idling mechanism (90) for stopping the engine (20) provided on the traveling vehicle body (2) is provided,
An idling detection member (91) for detecting the operation of the idling mechanism (90) is provided;
The seedling transplanter according to any one of claims 1 to 4, further comprising a control mechanism that does not detect the turning detection member (87) when the idling detection member (91) is in a detection state. .