JP5497602B2 - Transplanter - Google Patents

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JP5497602B2
JP5497602B2 JP2010214172A JP2010214172A JP5497602B2 JP 5497602 B2 JP5497602 B2 JP 5497602B2 JP 2010214172 A JP2010214172 A JP 2010214172A JP 2010214172 A JP2010214172 A JP 2010214172A JP 5497602 B2 JP5497602 B2 JP 5497602B2
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continuously variable
transmission
hydraulic continuously
variable transmission
state
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JP2012068978A (en
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昌嗣 土江
広武 門脇
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MITSUBISHI NOUKI KABUSHIKI KAISHA
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MITSUBISHI NOUKI KABUSHIKI KAISHA
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  • Transplanting Machines (AREA)
  • Arrangement Or Mounting Of Control Devices For Change-Speed Gearing (AREA)
  • Braking Elements And Transmission Devices (AREA)
  • Gear-Shifting Mechanisms (AREA)

Description

本発明は、乗用型田植機などの移植機に関する。   The present invention relates to a transplanter such as a riding rice transplanter.

主変速操作具の操作に応じて、走行動力及び作業動力を無段階に変速する油圧式無段変速装置(HST)を備える移植機が知られている。例えば、特許文献1には、機体停止操作具の操作に応じて、油圧式無段変速装置を強制的にニュートラル状態に復帰させることにより、機体を停止させる移植機が示されている。このような移植機によれば、走行動力及び作業動力を断続する従来の主クラッチ装置が不要になるので、大幅なコストダウンが図れるという利点がある。   2. Description of the Related Art A transplanter equipped with a hydraulic continuously variable transmission (HST) that continuously changes traveling power and work power in accordance with an operation of a main transmission operating tool is known. For example, Patent Document 1 discloses a transplanter that stops a vehicle body by forcibly returning a hydraulic continuously variable transmission to a neutral state in accordance with an operation of the vehicle body stop operation tool. According to such a transplanter, since the conventional main clutch device for intermittently driving and driving power is not required, there is an advantage that significant cost reduction can be achieved.

また、特許文献2には、降車位置から操作可能な降車操作具を備え、該降車操作具の操作に応じて、油圧式無段変速装置を微速前進状態とすることにより、降車状態での微速前進操作を可能にした移植機が示されている。このような移植機によれば、圃場への出入りや、トラックの荷台への積下を、降車状態で安全に行うことができるという利点がある。   Further, Patent Document 2 includes a dismounting operation tool that can be operated from a dismounting position, and in response to an operation of the dismounting operation tool, the hydraulic continuously variable transmission is set to a slow speed forward state so A transplanter that allows forward operation is shown. According to such a transplanter, there is an advantage that entry into and exit from the field and loading and unloading onto the loading platform of the truck can be safely performed in the dismounted state.

特開2002−225594号公報JP 2002-225594 A 特許第4164039号公報Japanese Patent No. 4164039

しかしながら、従来においては、特許文献1、2が備える上記の機能を併せ持ち、両機能による走行停止操作や降車走行操作を安全かつ確実に実行することができる移植機は実現されていない。   However, conventionally, a transplanter that has the above-described functions included in Patent Documents 1 and 2 and that can safely and reliably execute a travel stop operation and a get-off travel operation using both functions has not been realized.

本発明は、上記の如き実情に鑑みこれらの課題を解決することを目的として創作されたものであって、主変速操作具の操作に応じて、走行動力及び作業動力を無段階に変速する油圧式無段変速装置と、走行車輪を制動する機体停止ブレーキ装置と、機体停止操作具の操作に応じて、油圧式無段変速装置を強制的にニュートラル状態に復帰させ、かつ、機体停止ブレーキ装置を制動状態にする移植機において、前記機体停止操作具の操作に応じて、油圧式無段変速装置をニュートラルに位置決めする位置決め部材と、該位置決め部材と油圧式無段変速装置との連繋を解除可能な連繋解除部材と、降車位置から操作可能な降車操作具と、機体停止操作状態における降車操作具の操作に応じて、機体停止ブレーキ装置の制動状態を解除すると共に、位置決め部材と油圧式無段変速装置との連繋を解除して、油圧式無段変速装置を微速前進状態に操作する微速前進操作手段と、を備えることを特徴とする。
また、副変速操作具の操作に応じて走行動力を変速するギヤ式の副変速機構と、機体停止操作状態における副変速操作具のニュートラル操作に応じて、位置決め部材と油圧式無段変速装置との連繋を解除し、油圧式無段変速装置による作業動力の変速操作を許容する作業動力変速操作許容手段と、を備えることを特徴とする。
The present invention has been created in order to solve these problems in view of the above-described circumstances, and is a hydraulic pressure that continuously shifts traveling power and work power in accordance with the operation of a main transmission operating tool. Type continuously variable transmission, a body stop brake device that brakes a traveling wheel, and a hydraulic continuously variable transmission is forcibly returned to a neutral state in response to an operation of the body stop operation tool, and a body stop brake device In the transplanting machine that puts the brake into a braking state, a positioning member that positions the hydraulic continuously variable transmission neutrally according to the operation of the airframe stop operating tool, and the connection between the positioning member and the hydraulic continuously variable transmission is released. In accordance with the operation of the disengagement operation member that can be operated from the dismounting position, the dismounting operation tool that can be operated from the dismounting position, and the dismounting operation tool in the state of stopping the airframe, To release the interlocking between-decided Me member and HST, characterized by and a slow-speed forward operating means for operating the very low speed advancement state hydraulic stepless transmission.
A gear-type sub-transmission mechanism that shifts driving power in response to an operation of the sub-transmission operation tool; a positioning member and a hydraulic continuously variable transmission in response to a neutral operation of the sub-transmission operation tool in a state where the airframe is stopped. And a work power shift operation permitting means for permitting a shift operation of the work power by the hydraulic continuously variable transmission.

請求項1の発明によれば、油圧式無段変速装置を利用する走行停止機能や降車走行操作機能を併せ持つことができるだけでなく、両機能による走行停止操作や降車走行操作を安全かつ確実に実行することができる。
また、請求項2の発明によれば、機体を確実に停止させた状態で作業動力を変速し、作業機の運転点検を行うことができる。
According to the first aspect of the present invention, not only can the travel stop function and the get-off travel operation function using the hydraulic continuously variable transmission be provided, but also the travel stop operation and the get-off travel operation by both functions can be executed safely and reliably. can do.
According to the second aspect of the present invention, the working power can be changed in a state in which the machine body is reliably stopped, and the operation of the working machine can be checked.

乗用型田植機の側面図である。It is a side view of a riding type rice transplanter. 走行機体の平面図である。It is a top view of a traveling body. 走行機体の伝動構造を示す説明図である。It is explanatory drawing which shows the transmission structure of a traveling body. 走行機体の操作系を示す平面図である。It is a top view which shows the operation system of a traveling body. 走行機体の操作系を示す右側面図である。It is a right view which shows the operation system of a traveling body. 走行機体の操作系を示す左側面図である。It is a left view which shows the operating system of a traveling body. 操作具連繋機構の要部分解斜視図である。It is a principal part disassembled perspective view of an operation tool connection mechanism. 機体停止ペダルを操作したときの動作を示す操作具連繋機構の側面図である。It is a side view of the operation tool connection mechanism showing the operation when the machine body stop pedal is operated. 畔越えハンドルの側面図である。It is a side view of a crossing handle. 畔越えハンドルを操作したときの動作を示す操作具連繋機構の側面図である。It is a side view of the operation tool connection mechanism which shows operation | movement when operating a crossing handle. 走行停止状態(副変速レバー植付位置)を示す操作具連繋機構の側面図である。It is a side view of the operation tool linkage mechanism showing a travel stop state (sub-transmission lever planting position). 植付走行状態を示す操作具連繋機構の側面図である。It is a side view of the operation tool linkage mechanism showing the planting traveling state. 走行停止状態(副変速レバーニュートラル位置)を示す操作具連繋機構の側面図である。It is a side view of the operation tool linkage mechanism showing a travel stop state (sub-transmission lever neutral position).

以下、本発明の実施の形態について、図面に基づいて説明する。図1において、1は乗用型田植機であって、該乗用型田植機1は、走行機体2と、走行機体2の後部に昇降リンク機構3を介して連結される植付作業機4とを備えて構成されている。植付作業機4は、苗が載置される苗載台5、苗載台5から苗を掻取って植付ける植付機構6など、様々な部品・装置を備えた重量のある作業機である。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a riding type rice transplanter. The riding type rice transplanter 1 includes a traveling machine body 2 and a planting work machine 4 connected to a rear portion of the traveling machine body 2 via a lifting link mechanism 3. It is prepared for. The planting machine 4 is a heavy working machine equipped with various parts and devices such as a seedling stage 5 on which seedlings are placed and a planting mechanism 6 for scraping and planting seedlings from the seedling stage 5. is there.

図1及び図2に示すように、走行機体2は、エンジンEが搭載されるエンジン搭載部7、エンジン動力を変速するミッションケース8、オペレータが乗車する操作部9、操舵輪及び駆動輪を兼ねる前輪10、駆動輪である後輪11などを備える乗用型の四輪車両であり、機体前端部には、畔越え時に降車位置から走行操作を行うための畔越えハンドル(降車操作具)12を備えている。   As shown in FIGS. 1 and 2, the traveling machine body 2 also serves as an engine mounting portion 7 on which the engine E is mounted, a transmission case 8 for shifting engine power, an operation portion 9 on which an operator gets on, a steering wheel, and a driving wheel. It is a passenger-type four-wheel vehicle equipped with a front wheel 10 and a rear wheel 11 that is a driving wheel. A crossing handle (alighting operation tool) 12 is provided at the front end of the fuselage to perform a traveling operation from a dismounting position when crossing the shore. I have.

図3に示すように、エンジンEの動力は、ベルト伝動機構13を介して、主変速機構である油圧式無段変速装置(HST)14に入力される。油圧式無段変速装置14に入力されたエンジン動力は、油圧式無段変速装置14内で無段変速され、ミッションケース8に入力される。油圧式無段変速装置14の変速操作領域には、機体停止位置であるニュートラル位置(N)と、機体を前進させる前進変速操作領域(F)と、機体を後進させる後進変速操作領域(R)とが含まれている。   As shown in FIG. 3, the power of the engine E is input to a hydraulic continuously variable transmission (HST) 14 that is a main transmission mechanism via a belt transmission mechanism 13. The engine power input to the hydraulic continuously variable transmission 14 is continuously variable in the hydraulic continuously variable transmission 14 and input to the mission case 8. The speed change operation area of the hydraulic continuously variable transmission 14 includes a neutral position (N) that is a body stop position, a forward speed change operation area (F) that advances the airframe, and a reverse speed change operation area (R) that reverses the airframe. And are included.

ミッションケース8内には、入力軸15、植付伝動軸16、第一走行伝動軸17、第二走行伝動軸18などの伝動軸が設けられている。油圧式無段変速装置14から入力軸15に入力された動力は、株間変速機構19を介して植付伝動軸16に伝動されると共に、トルクリミッタ20及び植付クラッチ21を介して、植付伝動軸16から植付PTO軸22に伝動される。そして、植付PTO軸22から取り出される動力は、ミッションケース8外の伝動機構を経由して植付作業機4に伝動される。   In the transmission case 8, transmission shafts such as an input shaft 15, a planting transmission shaft 16, a first traveling transmission shaft 17, and a second traveling transmission shaft 18 are provided. The power input to the input shaft 15 from the hydraulic continuously variable transmission 14 is transmitted to the planting transmission shaft 16 via the inter-shaft transmission mechanism 19 and planted via the torque limiter 20 and the planting clutch 21. It is transmitted from the transmission shaft 16 to the planting PTO shaft 22. The power extracted from the planting PTO shaft 22 is transmitted to the planting work machine 4 via a transmission mechanism outside the mission case 8.

また、油圧式無段変速装置14から入力軸15に入力された動力は、副変速機構23を介して第一走行伝動軸17に伝動されると共に、第一走行伝動軸17から第二走行伝動軸18に伝動される。第二走行伝動軸18に伝動された動力は、前輪差動機構24を介して左右の前輪駆動軸25L、25Rに伝動されると共に、走行PTO軸26に伝動される。そして、走行PTO軸26から取り出される動力は、ミッションケース8外の伝動機構を経由してリヤアクスルケース27に伝動される。副変速機構23は、ギヤ式の変速機構であり、動力伝動を断つニュートラルと、植付走行に適した植付速と、路上走行に適した走行速とに変速操作される。   The power input from the hydraulic continuously variable transmission 14 to the input shaft 15 is transmitted to the first travel transmission shaft 17 via the auxiliary transmission mechanism 23 and from the first travel transmission shaft 17 to the second travel transmission. It is transmitted to the shaft 18. The power transmitted to the second travel transmission shaft 18 is transmitted to the left and right front wheel drive shafts 25L and 25R via the front wheel differential mechanism 24 and also transmitted to the travel PTO shaft 26. The power extracted from the traveling PTO shaft 26 is transmitted to the rear axle case 27 via a transmission mechanism outside the transmission case 8. The sub-transmission mechanism 23 is a gear-type transmission mechanism, and is speed-changed to a neutral for cutting off power transmission, a planting speed suitable for planting travel, and a travel speed suitable for road travel.

リヤアクスルケース27は、内装される左右のサイドクラッチ28L、28Rを介して左右の後輪11に動力を伝動するように構成されている。また、本実施形態の乗用型田植機1は、後輪11と植付作業機4との間に、整地装置29を備えており、該整地装置29をリヤアクスルケース27から取り出した動力で駆動させるようになっている。   The rear axle case 27 is configured to transmit power to the left and right rear wheels 11 via the left and right side clutches 28L and 28R that are internally provided. The riding type rice transplanter 1 according to the present embodiment includes a leveling device 29 between the rear wheel 11 and the planting work machine 4, and the leveling device 29 is driven by the power extracted from the rear axle case 27. It is like that.

また、走行PTO軸26上には、機体停止ブレーキ装置30が設けられている。この機体停止ブレーキ装置30を制動操作する際には、油圧式無段変速装置14のニュートラル操作も同時に行われるようになっている。これにより、走行動力を断続する従来の主クラッチ装置が不要になり、コストダウンが可能になる。   An airframe stopping brake device 30 is provided on the traveling PTO shaft 26. When the braking operation of the airframe stop brake device 30 is performed, the neutral operation of the hydraulic continuously variable transmission 14 is also performed at the same time. This eliminates the need for a conventional main clutch device for intermittently driving power, thereby reducing costs.

図1及び図2に示すように、操作部9には、オペレータが座る運転席31、前輪10を操舵するステアリングハンドル32、油圧式無段変速装置14を変速操作する主変速レバー(主変速操作具)33、副変速機構23を変速操作する副変速レバー(副変速操作具)34、機体停止ブレーキ装置30及び油圧式無段変速装置14を同時操作する機体停止ペダル(機体停止操作具)35などが配置されている。   As shown in FIGS. 1 and 2, the operation unit 9 includes a driver's seat 31 on which an operator sits, a steering handle 32 for steering the front wheels 10, and a main transmission lever (main transmission operation for shifting the hydraulic continuously variable transmission 14). 33), a sub-transmission lever (sub-transmission operation tool) 34 for shifting the sub-transmission mechanism 23, a machine body stop brake device 30 and a machine body stop pedal (machine body stop operation tool) 35 for simultaneously operating the hydraulic continuously variable transmission device 14. Etc. are arranged.

図4〜図8に示すように、主変速レバー33は、主変速レバー軸36を支点として前後方向に回動自在に設けられている。主変速レバー33の基端部は、ロッド37を介して油圧式無段変速装置14に連結されており、主変速レバー33の操作に応じてロッド37を押し引きすることにより、油圧式無段変速装置14が変速操作されるようになっている。   As shown in FIGS. 4 to 8, the main transmission lever 33 is provided to be rotatable in the front-rear direction with the main transmission lever shaft 36 as a fulcrum. The base end portion of the main transmission lever 33 is connected to the hydraulic continuously variable transmission 14 via a rod 37. By pushing and pulling the rod 37 according to the operation of the main transmission lever 33, the hydraulic continuously variable transmission is performed. The transmission 14 is operated to change speed.

副変速レバー34は、副変速レバー軸38を支点として前後方向に回動自在に設けられている。副変速レバー34の基端部は、ロッド39を介して副変速機構23に連結されており、副変速レバー34の操作に応じてロッド39を押し引きすることにより、副変速機構23が変速操作されるようになっている。   The auxiliary transmission lever 34 is provided so as to be rotatable in the front-rear direction with the auxiliary transmission lever shaft 38 as a fulcrum. The base end portion of the sub-transmission lever 34 is connected to the sub-transmission mechanism 23 via a rod 39. By pushing and pulling the rod 39 according to the operation of the sub-transmission lever 34, the sub-transmission mechanism 23 performs a speed change operation. It has come to be.

機体停止ペダル35は、ペダル軸40を支点とする上下回動により踏み込み操作自在となっている。機体停止ペダル35の基端部は、ロッド41を介してブレーキシャフト42の一端部に連結されており、機体停止ペダル35の踏込み操作に応じてブレーキシャフト42がブレーキ入り方向に回動するようになっている。   The machine body stop pedal 35 can be stepped on by rotating up and down with the pedal shaft 40 as a fulcrum. The base end portion of the airframe stop pedal 35 is connected to one end portion of the brake shaft 42 via the rod 41 so that the brake shaft 42 rotates in the brake application direction in response to the depression operation of the airframe stop pedal 35. It has become.

ロッド41には、スプリング43が連繋されており、このスプリング43によって機体停止ペダル35がブレーキ切り側に付勢されている。また、機体停止ペダル35の近傍には、駐車ブレーキロックバー44が設けられており、機体停止ペダル35に回動自在に設けられている係合アーム45を駐車ブレーキロックバー44に係合させることにより、機体停止ペダル35を踏込み操作状態に維持することができるようになっている。   A spring 43 is connected to the rod 41, and the body stop pedal 35 is urged toward the brake release side by the spring 43. In addition, a parking brake lock bar 44 is provided in the vicinity of the airframe stop pedal 35, and an engagement arm 45 provided rotatably on the airframe stop pedal 35 is engaged with the parking brake lock bar 44. Thus, the airframe stop pedal 35 can be maintained in the depressed state.

ブレーキシャフト42の中間部には、ブレーキ操作ロッド46を介して機体停止ブレーキ装置30のブレーキ操作アーム47が連結されており、ブレーキシャフト42のブレーキ入り方向の回動に応じて機体停止ブレーキ装置30が制動状態に操作され、ブレーキシャフト42のブレーキ切り方向の回動に応じて機体停止ブレーキ装置30の制動状態が解除されるようになっている。   A brake operation arm 47 of the airframe stop brake device 30 is connected to an intermediate portion of the brake shaft 42 via a brake operation rod 46, and the airframe stop brake device 30 according to the rotation of the brake shaft 42 in the brake application direction. Is operated in a braking state, and the braking state of the airframe stopping brake device 30 is released in accordance with the rotation of the brake shaft 42 in the braking direction.

ブレーキシャフト42の他端部は、機体停止ペダル35の踏込み操作に応じて油圧式無段変速装置14を強制的にニュートラル状態に復帰させるニュートラル強制復帰機構48を介して主変速レバー33に連繋されている。ニュートラル強制復帰機構48は、主変速レバー軸36を支点として回動自在な位置決め部材49及び連繋解除部材50と、上端部が位置決め部材49に連繋される一対のロッド51と、一対のロッド51の下端部とブレーキシャフト42の他端部を連結させ、機体停止ペダル35の踏込み操作に応じて一対のロッド51を下方に引っ張るロッド52とを備えて構成されている。   The other end of the brake shaft 42 is connected to the main transmission lever 33 via a neutral forced return mechanism 48 that forcibly returns the hydraulic continuously variable transmission 14 to the neutral state in response to the depressing operation of the airframe stop pedal 35. ing. The neutral forced return mechanism 48 includes a positioning member 49 and a connection release member 50 that are rotatable with the main transmission lever shaft 36 as a fulcrum, a pair of rods 51 whose upper ends are connected to the positioning member 49, and a pair of rods 51. The lower end portion and the other end portion of the brake shaft 42 are connected to each other, and a rod 52 that pulls the pair of rods 51 downward according to the depression operation of the airframe stop pedal 35 is configured.

位置決め部材49は、通常時は主変速レバー33と一体的に回動し、主変速レバー33を予め設定される複数の変速操作位置に位置決めするカム部材であり、例えば、本実施形態の位置決め部材49は、下端の円弧部に形成される複数のノッチ49aと、該ノッチ49aに弾圧状に入り込む位置決めピン53によって、前進側4段、ニュートラル1段、後進側4段の位置決めを行うようになっている。   The positioning member 49 is a cam member that normally rotates integrally with the main transmission lever 33 and positions the main transmission lever 33 at a plurality of preset shift operation positions. For example, the positioning member 49 of the present embodiment. 49, the plurality of notches 49a formed in the circular arc portion at the lower end and the positioning pin 53 that enters the notch 49a into a resilient shape are used to position the forward four steps, the neutral one step, and the reverse four steps. ing.

位置決め部材49の上端部には、切り欠き部49bが形成されており、この切り欠き部49bには、主変速レバー33の基端部から主変速レバー軸36と平行に突出するピン54が係合している。連繋解除部材50は、ピン54を切り欠き部49bの一端との間で挟むことにより、位置決め部材49と主変速レバー33を一体的に連繋させる一方、位置決め部材49に対する相対的な回動にもとづいて位置決め部材49と主変速レバー33との連繋を解除できるようになっている。   A notch 49 b is formed at the upper end of the positioning member 49, and a pin 54 that protrudes in parallel with the main speed change lever shaft 36 from the base end of the main speed change lever 33 is engaged with the notch 49 b. Match. The linkage releasing member 50 integrally connects the positioning member 49 and the main speed change lever 33 by sandwiching the pin 54 between one end of the notch 49 b, and based on relative rotation with respect to the positioning member 49. Thus, the linkage between the positioning member 49 and the main transmission lever 33 can be released.

連繋解除部材50の前後両端部には、ピン55、56が設けられており、一方のピン55は、ワイヤ57を介して畔越えハンドル12に連繋され、他方のピン56は、ワイヤ58及びスプリング59を介して副変速レバー34に連繋されている。そして、連繋解除部材50は、副変速レバー34が植付速又は走行速の場合は、スプリング59の付勢力で位置決め部材49と主変速レバー33との連繋状態を維持するが、畔越えハンドル12が操作された場合や、副変速レバー34がニュートラル位置に操作された場合は、位置決め部材49に対する相対的な回動により、位置決め部材49と主変速レバー33との連繋を解除するようになっている。尚、連繋解除部材50に設けられたスプリング60は、副変速レバー34がニュートラル位置に操作された際に連繋解除部材50を連繋解除方向に回動させるためのものである。   Pins 55 and 56 are provided at both front and rear ends of the linkage release member 50. One pin 55 is linked to the shore handle 12 via a wire 57, and the other pin 56 is a wire 58 and a spring. 59 is connected to the auxiliary transmission lever 34 via 59. The linkage release member 50 maintains the linkage state between the positioning member 49 and the main transmission lever 33 by the urging force of the spring 59 when the auxiliary transmission lever 34 is at the planting speed or the traveling speed. Is operated or when the auxiliary transmission lever 34 is operated to the neutral position, the relative rotation with respect to the positioning member 49 releases the linkage between the positioning member 49 and the main transmission lever 33. Yes. The spring 60 provided in the linkage release member 50 is for rotating the linkage release member 50 in the linkage release direction when the auxiliary transmission lever 34 is operated to the neutral position.

位置決め部材49の前後両端部には、主変速レバー軸36を中心とする円弧状の長孔49cが形成されている。これらの長孔49cには、一対のロッド51の上端部に設けられるピン51aがそれぞれ摺動自在に係合している。一対のピン51aは、機体停止ペダル35が操作されていない状態で、かつ、主変速レバー33がニュートラル位置のとき、それぞれ長孔49cの上下中央部に位置するため、主変速レバー33の操作に応じた位置決め部材49の回動を許容するが、図8に示すように、機体停止ペダル35の踏込み操作に応じて一対のロッド51が下方に引かれると、長孔49cの下端を押し下げるように作用し、位置決め部材49を強制的にニュートラル位置に復帰させる。これにより、位置決め部材49に連繋される主変速レバー33を前進変速操作領域又は後進変速操作領域から強制的にニュートラル位置に戻し、機体を停止させることが可能になる。   At both front and rear end portions of the positioning member 49, arc-shaped long holes 49c centering on the main transmission lever shaft 36 are formed. Pins 51a provided at the upper ends of the pair of rods 51 are slidably engaged with these long holes 49c. The pair of pins 51a are located at the upper and lower central portions of the long hole 49c when the airframe stop pedal 35 is not operated and the main transmission lever 33 is in the neutral position. Although the corresponding positioning member 49 is allowed to rotate, as shown in FIG. 8, when the pair of rods 51 are pulled downward according to the depression operation of the airframe stop pedal 35, the lower end of the long hole 49c is pushed down. Acting, the positioning member 49 is forcibly returned to the neutral position. As a result, the main shift lever 33 linked to the positioning member 49 can be forcibly returned to the neutral position from the forward shift operation region or the reverse shift operation region, and the airframe can be stopped.

図9に示すように、畔越えハンドル12は、機体の前端部に回動支軸61を支点として上下方向に回動操作自在に設けられている。畔越えハンドル12の基端部には、畔越えハンドル12を切り位置に向けて付勢するスプリング62が設けられており、このスプリング62の付勢力に抗して畔越えハンドル12の先端部を手で下方に押すことにより、畔越えハンドル12が入り位置(微速前進操作位置)となり、畔越えハンドル12の先端部から手を離せば、スプリング62の付勢力で畔越えハンドル12が切り位置に自動的に戻るようになっている。   As shown in FIG. 9, the crossing handle 12 is provided at the front end portion of the machine body so as to be rotatable in the vertical direction with a rotation support shaft 61 as a fulcrum. A spring 62 for urging the shore-crossing handle 12 toward the cutting position is provided at the base end of the shore-crossing handle 12, and the tip of the shore-crossing handle 12 is moved against the urging force of the spring 62. By pushing downward by hand, the transversal handle 12 enters the entry position (slow forward operation position), and when the hand is released from the tip of the transversal handle 12, the transversal handle 12 is moved to the cutting position by the urging force of the spring 62. It comes back automatically.

図10に示すように、本発明の実施形態に係る乗用型田植機1は、機体停止ペダル35が踏込み操作された状態における畔越えハンドル12の操作に応じて、機体停止ブレーキ装置30の制動状態を解除すると共に、位置決め部材49と油圧式無段変速装置14との連繋を解除して、油圧式無段変速装置14を微速前進状態に操作する微速前進操作手段を備える。   As shown in FIG. 10, the riding type rice transplanter 1 according to the embodiment of the present invention has a braking state of the airframe stop brake device 30 in accordance with the operation of the overpass handle 12 when the airframe stop pedal 35 is depressed. And a slow forward operation means for releasing the connection between the positioning member 49 and the hydraulic continuously variable transmission 14 and operating the hydraulic continuously variable transmission 14 in the slow forward state.

本実施形態の微速前進操作手段は、畔越えハンドル12の操作に応じて、機体停止ブレーキ装置30の制動状態を解除するワイヤ63と、位置決め部材49と油圧式無段変速装置14との連繋を解除して、油圧式無段変速装置14を微速前進状態に操作するワイヤ57とを備えて構成されている。   The slow speed forward operation means of the present embodiment connects the wire 63 for releasing the braking state of the airframe stopping brake device 30 according to the operation of the crossing handle 12, the positioning member 49, and the hydraulic continuously variable transmission 14. The wire 57 is configured to be released and to operate the hydraulic continuously variable transmission 14 to a fine speed forward state.

ワイヤ63は、畔越えハンドル12とブレーキ操作アーム47とを連繋しており、畔越えハンドル12が操作されたとき、ブレーキ操作ロッド46に介在するスプリング46aに抗してブレーキ操作アーム47をブレーキ切り側に操作することにより、機体停止ブレーキ装置30の制動状態を解除するようになっている。   The wire 63 connects the crossing handle 12 and the brake operating arm 47. When the crossing handle 12 is operated, the brake operating arm 47 is braked against the spring 46a interposed in the brake operating rod 46. By operating to the side, the braking state of the airframe stop brake device 30 is released.

また、ワイヤ57は、基端側が畔越えハンドル12に連繋され、他端側が連繋金具64を介して、連繋解除部材50のピン55と、主変速レバー33のピン37a(ロッド37)とに連繋されており、畔越えハンドル12が操作されたとき、ピン55を下方に引いて連繋解除部材50を位置決め部材49に対して相対的に回動させることにより、位置決め部材49と主変速レバー33との連繋を解除すると共に、ピン37aを下方に引いて主変速レバー33(油圧式無段変速装置14)を微速前進状態に操作するようになっている。   Further, the wire 57 is connected to the handle 12 on the base end side and connected to the pin 55 of the connection release member 50 and the pin 37a (rod 37) of the main transmission lever 33 through the connection fitting 64 on the other end side. When the crossing handle 12 is operated, the pin 55 is pulled downward to rotate the linkage release member 50 relative to the positioning member 49, whereby the positioning member 49 and the main transmission lever 33 are Is released, and the pin 37a is pulled downward to operate the main speed change lever 33 (hydraulic continuously variable transmission 14) to the slow speed forward state.

本実施形態の連繋金具64は、連繋解除部材50のピン55に係合する長孔部64aと、主変速レバー33のピン37aに連繋される長孔部64bを別々に備えると共に、長孔部64aの上端が長孔部64bの上端よりも下方に位置するように形成されている。このようにすると、畔越えハンドル12が操作されたとき、まず、ピン55を下方に引いて位置決め部材49と主変速レバー33との連繋を解除した後、ピン37aを下方に引いて主変速レバー33を微速前進状態に操作できるので、畔越えハンドル12による微速前進操作を円滑に行うことができる。また、長孔部64a、64bを介した連繋構造とすることにより、畔越えハンドル12の非操作時において、位置決め部材49や主変速レバー33の動作を阻害する不都合も回避することができる。   The connecting metal fitting 64 of the present embodiment separately includes a long hole portion 64a that engages with the pin 55 of the connection release member 50 and a long hole portion 64b that is connected to the pin 37a of the main transmission lever 33, and the long hole portion. The upper end of 64a is formed below the upper end of the long hole portion 64b. In this way, when the crossing handle 12 is operated, first, the pin 55 is pulled downward to release the connection between the positioning member 49 and the main transmission lever 33, and then the pin 37a is pulled downward to move the main transmission lever. Since 33 can be operated in the slow speed forward state, the slow speed forward operation by the crossing handle 12 can be smoothly performed. In addition, the connection structure through the long hole portions 64a and 64b can also avoid the inconvenience of hindering the operation of the positioning member 49 and the main speed change lever 33 when the piercing handle 12 is not operated.

尚、畔越えハンドル12の操作後、畔越えハンドル12を手を離した場合は、スプリング52の付勢力で畔越えハンドル12が切り位置に自動的に復帰するのに伴い、上記とは逆の作用によって、機体停止ブレーキ装置30が制動状態に戻ると共に、油圧式無段変速装置14がニュートラル状態となり、機体が停止される。   In addition, when the crossing handle 12 is released after the operation of the crossing handle 12, the reverse of the above is accompanied by the automatic return of the crossing handle 12 to the cutting position by the biasing force of the spring 52. As a result, the airframe stop brake device 30 returns to the braking state, and the hydraulic continuously variable transmission 14 enters the neutral state, and the airframe is stopped.

また、図11〜図13に示すように、本発明の実施形態に係る乗用型田植機1は、機体停止ペダル35が踏込み操作された状態における副変速レバー34のニュートラル操作に応じて、位置決め部材49と主変速レバー33との連繋を解除し、主変速レバー33による作業動力の変速操作を許容する作業動力変速操作許容手段を備える。   Further, as shown in FIGS. 11 to 13, the riding type rice transplanter 1 according to the embodiment of the present invention has a positioning member in accordance with the neutral operation of the auxiliary transmission lever 34 in a state where the machine stop pedal 35 is depressed. 49 is provided with work power shift operation permitting means for releasing the connection between the main shift lever 49 and the main shift lever 33 and allowing the main shift lever 33 to shift the work power.

本実施形態の作業動力変速操作許容手段は、副変速レバー34を連繋解除部材50に連繋させるワイヤ58及びスプリング59を備えて構成されている。ワイヤ58及びスプリング59は、副変速レバー34が植付速又は走行速の場合は、図11及び図12に示すように、スプリング59の付勢力で連繋解除部材50のピン56を下方に引き、連繋位置決め部材49と主変速レバー33との連繋状態を維持する。一方、副変速レバー34がニュートラル位置に操作された場合は、図13に示すように、ワイヤ58が弛み状態となり、スプリング60の付勢力で連繋解除部材50が位置決め部材49に対して相対的に回動し、位置決め部材49と主変速レバー33との連繋を解除するので、主変速レバー33による作業動力の変速操作が許容され、機体停止状態における植付作業機4の運転点検を行うことが可能になる。   The work power shift operation permitting means of the present embodiment is configured to include a wire 58 and a spring 59 that link the auxiliary shift lever 34 to the link release member 50. When the auxiliary transmission lever 34 is at the planting speed or the traveling speed, the wire 58 and the spring 59 pull the pin 56 of the connecting release member 50 downward by the urging force of the spring 59, as shown in FIGS. The connection state between the connection positioning member 49 and the main transmission lever 33 is maintained. On the other hand, when the auxiliary transmission lever 34 is operated to the neutral position, the wire 58 is loosened as shown in FIG. 13, and the linking force of the spring 60 causes the link release member 50 to move relative to the positioning member 49. Since it rotates and the connection between the positioning member 49 and the main speed change lever 33 is released, a shift operation of the working power by the main speed change lever 33 is allowed, and the operation check of the planting work machine 4 can be performed when the machine body is stopped. It becomes possible.

叙述の如く構成された本実施形態によれば、主変速レバー33の操作に応じて、走行動力及び作業動力を無段階に変速する油圧式無段変速装置14と、走行車輪(後輪11)を制動する機体停止ブレーキ装置30と、機体停止ペダル35の操作に応じて、油圧式無段変速装置14を強制的にニュートラル状態に復帰させ、かつ、機体停止ブレーキ装置30を制動状態にする乗用型田植機1において、機体停止ペダル35の操作に応じて、油圧式無段変速装置14をニュートラルに位置決めする位置決め部材49と、該位置決め部材49と油圧式無段変速装置14との連繋を解除可能な連繋解除部材50と、降車位置から操作可能な畔越えハンドル12と、機体停止操作状態における畔越えハンドル12の操作に応じて、機体停止ブレーキ装置30の制動状態を解除すると共に、位置決め部材49と油圧式無段変速装置14との連繋を解除して、油圧式無段変速装置14を微速前進状態に操作する微速前進操作手段と、を備えるので、油圧式無段変速装置14を利用する走行停止機能や降車走行操作機能を併せ持つことができるだけでなく、両機能による走行停止操作や降車走行操作を安全かつ確実に実行することができる。   According to the present embodiment configured as described, the hydraulic continuously variable transmission 14 that continuously changes the traveling power and the working power in accordance with the operation of the main transmission lever 33, and the traveling wheel (rear wheel 11). The vehicle body stop brake device 30 that brakes the vehicle, and the hydraulic continuously variable transmission 14 is forcibly returned to the neutral state according to the operation of the vehicle body stop pedal 35, and the vehicle body stop brake device 30 is put into a braking state. In the type rice transplanter 1, the positioning member 49 for neutrally positioning the hydraulic continuously variable transmission 14 according to the operation of the machine body stop pedal 35 and the connection between the positioning member 49 and the hydraulic continuously variable transmission 14 are released. A possible linkage release member 50, an overpass handle 12 that can be operated from the disembarking position, and an aircraft stop brake device according to the operation of the overpass handle 12 in the aircraft stop operation state And a slow-speed forward operation means for releasing the zero braking state and releasing the connection between the positioning member 49 and the hydraulic continuously variable transmission 14 so as to operate the hydraulic continuously variable transmission 14 to the very low speed forward state. Therefore, it is possible not only to have a traveling stop function and a dismounting traveling operation function using the hydraulic continuously variable transmission 14, but also to perform a traveling stopping operation and a dismounting traveling operation by both functions safely and reliably.

また、副変速レバー34の操作に応じて走行動力を変速するギヤ式の副変速機構23と、機体停止操作状態における副変速レバー34のニュートラル操作に応じて、位置決め部材49と油圧式無段変速装置14との連繋を解除し、油圧式無段変速装置14による作業動力の変速操作を許容する作業動力変速操作許容手段と、を備えるので、機体を確実に停止させた状態で作業動力を変速し、植付作業機4の運転点検を行うことができる。   Further, a gear-type sub-transmission mechanism 23 that shifts driving power in accordance with the operation of the sub-transmission lever 34, and a positioning member 49 and a hydraulic stepless transmission in accordance with a neutral operation of the sub-transmission lever 34 in a state where the machine is stopped. The operation power shift operation permitting means for releasing the connection with the device 14 and allowing the hydraulic continuously variable transmission device 14 to shift the work power is provided, so that the work power can be shifted in a state where the airframe is stopped reliably. Thus, the operation of the planting work machine 4 can be checked.

1 乗用型田植機
2 走行機体
4 植付作業機
10 前輪
11 後輪
14 油圧式無段変速装置
23 副変速機構
30 機体停止ブレーキ装置
33 主変速レバー
34 副変速レバー
35 機体停止ペダル
48 ニュートラル強制復帰機構
49 位置決め部材
50 連繋解除部材
DESCRIPTION OF SYMBOLS 1 Riding type rice transplanter 2 Traveling machine body 4 Planting work machine 10 Front wheel 11 Rear wheel 14 Hydraulic stepless transmission 23 Sub transmission mechanism 30 Machine stop brake device 33 Main transmission lever 34 Sub transmission lever 35 Machine stop pedal 48 Neutral forced return Mechanism 49 Positioning member 50 Link release member

Claims (2)

主変速操作具の操作に応じて、走行動力及び作業動力を無段階に変速する油圧式無段変速装置と、
走行車輪を制動する機体停止ブレーキ装置と、
機体停止操作具の操作に応じて、油圧式無段変速装置を強制的にニュートラル状態に復帰させ、かつ、機体停止ブレーキ装置を制動状態にする移植機において、
前記機体停止操作具の操作に応じて、油圧式無段変速装置をニュートラルに位置決めする位置決め部材と、
該位置決め部材と油圧式無段変速装置との連繋を解除可能な連繋解除部材と、
降車位置から操作可能な降車操作具と、
機体停止操作状態における降車操作具の操作に応じて、機体停止ブレーキ装置の制動状態を解除すると共に、位置決め部材と油圧式無段変速装置との連繋を解除して、油圧式無段変速装置を微速前進状態に操作する微速前進操作手段と、を備えることを特徴とする移植機。
A hydraulic continuously variable transmission that continuously changes the traveling power and work power in accordance with the operation of the main transmission operating tool;
A body stop brake device for braking the traveling wheel;
In the transplanting machine forcibly returning the hydraulic continuously variable transmission to the neutral state in accordance with the operation of the airframe stop operating tool and setting the airframe stop brake device to the braking state,
A positioning member that positions the hydraulic continuously variable transmission in neutral according to the operation of the airframe stop operating tool;
A linkage release member capable of releasing linkage between the positioning member and the hydraulic continuously variable transmission;
A getting-off operation tool operable from the getting-off position;
In response to the operation of the dismounting operation tool in the airframe stop operation state, the brake state of the airframe stop brake device is released, and the link between the positioning member and the hydraulic continuously variable transmission is released, and the hydraulic continuously variable transmission is A transplanting machine comprising: a slow speed forward operating means for operating in a slow speed forward state.
副変速操作具の操作に応じて走行動力を変速するギヤ式の副変速機構と、
機体停止操作状態における副変速操作具のニュートラル操作に応じて、位置決め部材と油圧式無段変速装置との連繋を解除し、油圧式無段変速装置による作業動力の変速操作を許容する作業動力変速操作許容手段と、を備えることを特徴とする請求項1記載の移植機。
A gear-type sub-transmission mechanism that shifts traveling power in accordance with the operation of the sub-transmission operation tool;
Work power shift that releases the link between the positioning member and the hydraulic continuously variable transmission in response to the neutral operation of the auxiliary transmission operating tool in the machine stop operation state and allows the operation power to be shifted by the hydraulic continuously variable transmission. The transplanter according to claim 1, further comprising an operation permission unit.
JP2010214172A 2010-09-24 2010-09-24 Transplanter Expired - Fee Related JP5497602B2 (en)

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