JP2005176662A

JP2005176662A - Tilling device

Info

Publication number: JP2005176662A
Application number: JP2003419708A
Authority: JP
Inventors: Hiroyuki Arai; 弘之新井
Original assignee: Yanmar Co Ltd
Current assignee: Yanmar Co Ltd
Priority date: 2003-12-17
Filing date: 2003-12-17
Publication date: 2005-07-07

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tilling device suitable for operation of various uses. <P>SOLUTION: In this tilling device which is freely liftably and lowerably connected through a lifting and lowering mechanism to the rear of a tractor and with which power is transmitted through a transmission means from the tractor, a tilling part supporting body to be extended in the right and left directions is connected to the rear end part of the lifting and lowering mechanism, tilling parts are attached to the central part and the right and left side parts of the tilling part supporting body, respectively, the lower part of each tilling part is equipped with a tilling shaft having an axis in the right and left direction in a projected state in right and left outsides, these tilling shafts are arranged on approximately the same axis extended in the right and left directions, and tilling tine shafts are detachably mounted between the tilling shafts opposing in the right and left directions. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、牽引車の後方に連結されて中耕、培土等の多目的作業を行うための耕耘装置に関する。 The present invention relates to a tilling device that is connected to the rear of a towing vehicle and performs multipurpose operations such as medium tillage and cultivation.

従来、牽引車の後方に連結されて中耕、培土等の多目的作業を行う耕耘装置の一形態として、牽引車の後方に昇降機構を介して昇降自在に連結されると共に、伝動手段を介して牽引車より動力が伝達されるようにしたものがある（例えば、特許文献１参照）。 Conventionally, as a form of a tilling device that is connected to the rear of the towing vehicle and performs multipurpose operations such as plowing and cultivating, it is connected to the rear of the towing vehicle through an elevating mechanism so as to be able to move up and down and towed through transmission means There is one in which power is transmitted from a vehicle (see, for example, Patent Document 1).

すなわち、上記耕耘装置は、昇降機構の後端部に連結されるヒッチ体に伝動ギヤケースを連設し、同伝動ギヤケースの後方位置に左右方向に直状に伸延する耕耘部支持体を設け、同耕耘部支持体の中央部と左右側部にそれぞれ耕耘部を左右方向に間隔を開けて取り付けると共に、伝動ギヤケースに連動連結した連動ケースと各耕耘部に、左右方向に伸延する伝動軸を貫通させて連動連結し、同伝動軸の両端部を耕耘部支持体の両端部に垂設した支持板体により両持ちの状態にて支持している。 That is, the tilling device has a transmission gear case connected to the hitch body connected to the rear end of the lifting mechanism, and a tiller support that extends straight in the left-right direction at the rear position of the transmission gear case. At the center and left and right sides of the tiller support, the tillers are attached at intervals in the left and right direction, and the transmission case extending in the left and right direction is passed through the interlocking case and each tillage part linked to the transmission gear case. And the both ends of the transmission shaft are supported in a supported state by support plates that are suspended from both ends of the tillage support.

そして、上記耕耘装置では、以下の形態にて作業を行うことができる。 And in the said tillage apparatus, work can be performed with the following forms.

（１）三個の耕耘部を並列させて連ねた状態（三連）で、二つの畝を跨いで行う中耕培土作業。 (1) Middle tillage cultivation work performed across two ridges in a state where three tillage parts are arranged in parallel (three ties).

（２）中央部の耕耘部を取り外して、左右側部の耕耘部により行う作業（中耕培土やたばこで堆肥を筋蒔きした後の畝立て等）。 (2) An operation performed by removing the central tillage part and using the right and left side tillage parts (for example, raising after composting the compost with medium tillage medium or tobacco).

（３）中央部の耕耘部のみで行う作業（台形畝、丸畝の畝立て作業等）。
特開平４−３１６４１０号公報 (3) Work carried out only at the center of the tillage part (trapezoidal fence, round fence erecting work, etc.).
JP-A-4-316410

ところで、畑作作業としては、上記した作業以外に、全面耕耘作業といった作業形態もあり、その一例として、天場細土（ほうれん草等の播種を行う前の表面耕起や細土作業）があり、かかる天場細土は、台形畝の天場の表面を耕起あるいは細土する作業であるが、従来においては、牽引車から三連の耕耘装置を取り外し、一般的な耕耘装置を装着して作業を行っている。 By the way, in addition to the above-mentioned work, there are work forms such as full-plowing work as an upland farming work, as an example, there is Tenchi fine soil (surface plowing and fine soil work before sowing spinach etc.), Such Tenji fine soil is an operation of plowing or thinning the surface of the trapezoidal fence's heaven field. Conventionally, a triple tillage device is removed from the towing vehicle and a general tillage device is attached. Doing work.

しかしながら、このように三連の耕耘装置と一般的な耕耘装置とを付け替えて作業を行うことは、耕耘装置の脱着作業に手間を要する上に二種類の耕耘装置を準備しておかなければならず、コスト的にも高くなるという不具合がある。 However, in order to replace the triple tillage device and the general tillage device in this way, it takes time to attach and detach the tillage device, and two kinds of tillage devices must be prepared. However, there is a problem that the cost increases.

そこで、本発明では、牽引車の後方に昇降機構を介して昇降自在に連結されると共に、伝動手段を介して牽引車より動力が伝達されるようにした耕耘装置において、昇降機構の後端部に左右方向に伸延する耕耘部支持体を連結し、同耕耘部支持体の中央部と左右側部のそれぞれに耕耘部を取り付けると共に、各耕耘部の下部に左右方向に軸線を向けた耕耘軸を左右外側方へ突出状に設けると共に、これらの耕耘軸を左右方向に伸延する略同一軸線上に配置して、左右方向に対向する耕耘軸間に耕耘爪軸を着脱自在に架設したことを特徴とする耕耘装置を提供するものである。 Therefore, in the present invention, the rear end of the lifting mechanism is connected to the rear of the towing vehicle through a lifting mechanism so as to be movable up and down, and power is transmitted from the towing vehicle through a transmission means. A tiller shaft that extends in the left and right direction and is attached to each of the central part and the left and right side parts of the tiller part support body, and an axis is directed to the lower part of each tiller part in the left and right direction. Are arranged on the same axis that extends in the left-right direction, and the tilling claw shaft is detachably installed between the tilling shafts facing in the left-right direction. A plowing device is provided.

また、本発明は、耕耘部支持体に中央部の耕耘部を着脱自在に取り付けて、同耕耘部を取り外した状態にて、左右側の耕耘部の耕耘軸間に耕耘爪軸を着脱自在に架設したことにも特徴を有する。 Further, the present invention attaches the cultivating part at the center to the cultivating part support so that the cultivating claw axis can be detachably attached between the cultivating axes of the right and left cultivating parts with the cultivating part removed. It is also characterized by its construction.

（１）請求項１記載の本発明では、牽引車の後方に昇降機構を介して昇降自在に連結されると共に、伝動手段を介して牽引車より動力が伝達されるようにした耕耘装置において、昇降機構の後端部に左右方向に伸延する耕耘部支持体を連結し、同耕耘部支持体の中央部と左右側部のそれぞれに耕耘部を取り付けると共に、各耕耘部の下部に左右方向に軸線を向けた耕耘軸を左右外側方へ突出状に設けると共に、これらの耕耘軸を左右方向に伸延する略同一軸線上に配置して、左右方向に対向する耕耘軸間に耕耘爪軸を着脱自在に架設している。 (1) In the present invention described in claim 1, in the tilling device that is connected to the rear of the towing vehicle through a lifting mechanism so as to be movable up and down, and the power is transmitted from the towing vehicle through a transmission means. A tiller support that extends in the left-right direction is connected to the rear end of the lifting mechanism, and a tiller is attached to each of the center and left and right sides of the tiller support, and the lower part of each tiller is horizontally The tilling shafts with the axis facing are provided in a protruding manner to the left and right outer sides, and these tilling shafts are arranged on substantially the same axis extending in the left-right direction, and the tilling nail shaft is attached and detached between the tilling shafts facing in the left-right direction It is installed freely.

このようにして、耕耘爪軸を装着することにより、全面耕耘作業も行うことができ、多用途の作業に適応させることができる。 In this way, by mounting the tilling claw shaft, the entire tillage work can be performed, and it can be adapted to multipurpose work.

この際、中央部の耕耘部により耕耘爪軸を支持しているため、強度を良好に確保することができる。 At this time, since the tilling nail shaft is supported by the middle tilling portion, the strength can be secured satisfactorily.

（２）請求項２記載の本発明では、耕耘部支持体に中央部の耕耘部を着脱自在に取り付けて、同耕耘部を取り外した状態にて、左右側の耕耘部の耕耘軸間に耕耘爪軸を着脱自在に架設している。 (2) In the present invention described in claim 2, with the cultivating part support attached to the cultivating part support in a detachable manner, the cultivated part between the cultivating shafts of the left and right cultivating parts with the cultivating part removed. The claw shaft is detachably installed.

このようにして、左右側の耕耘部の耕耘軸間に耕耘爪軸を架設して、全面耕耘作業を行うことができ、この際、中央部の耕耘部を取り外しているため、中央部に残耕が生じることがなく、残耕処理作業を行う必要性がなくなるため、効率良く全面耕耘作業を行うことができる。 In this way, a tilling claw shaft can be installed between the tilling shafts of the left and right side tilling sections, and the entire tilling work can be carried out. Since no plowing occurs and there is no need to perform the residual plowing work, the entire plowing work can be efficiently performed.

図１に示すＡは、本発明に係る耕耘装置であり、同耕耘装置Ａは、牽引車Ｂの後方に昇降機構１を介して昇降自在に連結されると共に、昇降自在となした伝動手段としての第１伝動ケース２と第２伝動ケース３を介して牽引車Ｂより動力が伝達されるようにしている。 A shown in FIG. 1 is a cultivator according to the present invention, and the cultivator A is connected to the rear of the towing vehicle B via an elevating mechanism 1 so as to be movable up and down, and as transmission means that can be raised and lowered. The power is transmitted from the towing vehicle B through the first transmission case 2 and the second transmission case 3.

以下に、まず、上記した牽引車Ｂ、昇降機構１、第１伝動ケース２、第２伝動ケース３の構成について、この順序で説明して上で、その後に、本発明に係る耕耘装置Ａについて説明する。 Below, after demonstrating in this order about the structure of the above-mentioned towing vehicle B, the raising / lowering mechanism 1, the 1st transmission case 2, and the 2nd transmission case 3, it is about the tilling apparatus A which concerns on this invention after that. explain.

〔牽引車Ｂ〕
牽引車Ｂは、車体本体10の前部に運転部11を配置すると共に、後部に原動機部12を配置し、また、車体本体10の前部下方にフロントアクスルケース13を介して左右一対の前車輪14,14を取り付けると共に、後部下方にリヤアクスルケース15を介して後車輪16,16を取り付けている。 [Towing vehicle B]
The towing vehicle B has a driving unit 11 disposed at the front of the vehicle body 10, a motor unit 12 disposed at the rear, and a pair of left and right fronts via a front axle case 13 below the front of the vehicle body 10. The wheels 14 and 14 are attached, and the rear wheels 16 and 16 are attached to the lower rear portion via the rear axle case 15.

ここで、牽引車Ｂは、図１に示すように、車体本体10の地上高を高く設定して、図７〜図１１に示すように、圃場Ｇの畝Ｕを跨いだ状態で走行しながら所要の作業が行えるようにしている。 Here, as shown in FIG. 1, the tow vehicle B is set to have a high ground clearance of the vehicle body 10 and travels in a state straddling the fence U of the field G as shown in FIGS. 7 to 11. The required work can be performed.

運転部11は、前部にステアリングコラム17を立設し、同ステアリングコラム17の上端部にホイール支軸18を介してステアリングホイール19を取り付け、同ステアリングホイール19の後方位置に運転席20を配置している。 The driving unit 11 has a steering column 17 standing at the front, a steering wheel 19 is attached to the upper end of the steering column 17 via a wheel support shaft 18, and a driver's seat 20 is disposed behind the steering wheel 19. doing.

原動機部12は、エンジン21より左側方へ出力軸22を突出させ、同出力軸22と前記運転席20の下方に配置したミッション部（図示せず）の入力軸との間にミッション部伝動ベルト23を巻回すると共に、車体本体10の後端部に筒状の軸支持体24を介して左右方向に伸延するＰＴＯ軸25を設け、同ＰＴＯ軸25の左側端部と上記出力軸22との間にＰＴＯ軸駆動ベルト26を巻回している。27は出力プーリ、28はＰＴＯ入力プーリ、29はテンションローラである。 The prime mover unit 12 has an output shaft 22 projecting leftward from the engine 21 and a transmission belt transmission belt between the output shaft 22 and an input shaft of a mission unit (not shown) disposed below the driver seat 20. 23, and a PTO shaft 25 extending in the left-right direction via a cylindrical shaft support 24 is provided at the rear end of the vehicle body 10, and the left end of the PTO shaft 25 and the output shaft 22 The PTO shaft drive belt 26 is wound between the two. 27 is an output pulley, 28 is a PTO input pulley, and 29 is a tension roller.

〔昇降機構１〕
昇降機構1は、前記軸支持体24の中央部に牽引車側ヒッチ体30の基端部（前端部）を枢支して、同牽引車側ヒッチ体30を上下回動自在となし、同牽引車側ヒッチ体30の上部と車体本体10の後端上部との間に昇降用シリンダ31を介設している。 [Elevating mechanism 1]
The elevating mechanism 1 is configured such that the base end portion (front end portion) of the tow vehicle side hitch body 30 is pivotally supported at the central portion of the shaft support body 24 so that the tow vehicle side hitch body 30 is freely rotatable up and down. An elevating cylinder 31 is interposed between the upper part of the tow vehicle side hitch body 30 and the rear end upper part of the vehicle body 10.

このようにして、昇降用シリンダ31を伸縮作動させることにより、牽引車側ヒッチ体30を上下方向に回動させて、同牽引車側ヒッチ体30に連結した耕耘装置Ａを昇降させることができるようにしている。 In this way, by extending and retracting the lifting cylinder 31, the towing vehicle-side hitch body 30 can be turned up and down, and the tiller A connected to the towing vehicle-side hitch body 30 can be raised and lowered. I am doing so.

〔第１伝動ケース２と第２伝動ケース３〕
第１伝動ケース２と第２伝動ケース３は、それぞれ前後方向に伸延させて形成したチェンケースであり、前記ＰＴＯ軸25に第１伝動ケース２の前端部を連動連結すると共に、同第１伝動ケース２の後端部に第２伝動ケース３の前端部を内外側に重合状態となして、左右方向の軸線廻りに回動自在に連動連結している。 [First transmission case 2 and second transmission case 3]
The first transmission case 2 and the second transmission case 3 are chain cases formed by extending in the front-rear direction, and the front end portion of the first transmission case 2 is interlocked and connected to the PTO shaft 25. The front end portion of the second transmission case 3 is superposed on the rear end portion of the case 2 on the inner and outer sides, and is interlocked and connected so as to be rotatable around a horizontal axis.

そして、第２伝動ケース３の後端部には、図２及び図３に示すように、左右方向に軸線を向けた左右一対のボス部32,32を連通連設し、両ボス部32,32中にベアリング33,33を介して左右方向に伸延する出力軸34を回動自在に支持して、同出力軸34の左・右側突出端部34a,34bを左右外側方へ突出させている。35は出力スプロケット、36は伝動チェンである。 As shown in FIGS. 2 and 3, a pair of left and right boss portions 32, 32 having an axis line in the left-right direction are connected to the rear end portion of the second transmission case 3, and both boss portions 32, An output shaft 34 extending in the left-right direction via bearings 33, 33 is rotatably supported in 32, and the left and right protruding end portions 34a, 34b of the output shaft 34 protrude outward in the left-right direction. . 35 is an output sprocket, and 36 is a transmission chain.

このようにして、第２伝動ケース３の後端部より左右側方へ突出させている出力軸34の左右側突出端部34a,34bに、後述する耕耘装置Ａの左・右側伝動軸100,103を連動連結することにより、前記ＰＴＯ軸25→第１伝動ケース２→第２伝動ケース３に設けた出力軸34の左右側端部34a,34b→左・右側伝動軸に動力を伝達することができるようにしている。 In this way, left and right transmission shafts 100 and 103 of the tillage device A, which will be described later, are provided on the left and right projecting end portions 34a and 34b of the output shaft 34 projecting from the rear end portion of the second transmission case 3 to the left and right sides. By interlocking connection, power can be transmitted from the PTO shaft 25 → the first transmission case 2 → the left and right end portions 34a, 34b of the output shaft 34 provided in the second transmission case 3 → the left and right transmission shafts. I am doing so.

〔耕耘装置Ａ〕
本発明に係る耕耘装置Ａは、牽引車側ヒッチ体30に着脱自在に連結する耕耘装置側ヒッチ体40と、同耕耘装置側ヒッチ体40に取り付けた支持部材部41と、同支持部材部41に着脱自在に取り付けた複数（本実施の形態では三個）の耕耘部42,42,42と、これらの耕耘部42,42,42に動力を伝達する伝動機構部43とを具備している。 [Tilling device A]
A cultivating apparatus A according to the present invention includes a cultivating apparatus side hitch body 40 that is detachably coupled to a towing vehicle side hitch body 30, a support member section 41 attached to the cultivator apparatus side hitch body 40, and the support member section 41. A plurality of (in this embodiment, three) tillage parts 42, 42, 42, and a transmission mechanism part 43 that transmits power to these tillage parts 42, 42, 42. .

以下に、上記した構成部材である耕耘装置側ヒッチ体40、支持部材部41、耕耘部42、及び、伝動機構部43の構成について、この順序で説明する。 Below, the structure of the tilling device side hitch body 40 which is an above-described structural member, the support member part 41, the tilling part 42, and the transmission mechanism part 43 is demonstrated in this order.

（耕耘装置側ヒッチ体40）
耕耘装置側ヒッチ体40は、図２〜図４に示すように、左右一対のヒッチ体形成片45,45の後上部同士を連結片46により連結し、各ヒッチ体形成片45,45の前側上部の内側面にピン支持片47,47を左右対向状態に取り付けて、ヒッチ体形成片45,45とピン支持片47,47との間に左右方向に軸線を向けた上部係止ピン48,48を架設する一方、各ヒッチ体形成片45,45の前側下部間に左右方向に軸線を向けた下部係止ピン49を架設して形成している。 (Tillage device side hitch body 40)
As shown in FIGS. 2 to 4, the tiller device-side hitch body 40 connects the rear upper portions of a pair of left and right hitch body forming pieces 45, 45 by connecting pieces 46, and the front side of each hitch body forming piece 45, 45. Pin support pieces 47, 47 are attached to the inner surface of the upper part in a state of facing left and right, and upper locking pins 48, with the axis lined in the left-right direction between the hitch body forming pieces 45, 45 and the pin support pieces 47, 47, On the other hand, a lower locking pin 49 is formed between the front lower portions of the hitch body forming pieces 45 and 45 with a lower axis pin 49 extending in the left-right direction.

このようにして、耕耘装置側ヒッチ体40は、上部係止ピン48,48と下部係止ピン49とを介して牽引車側ヒッチ体30に着脱自在に連結することができるようにしている。 In this way, the tilling device side hitch body 40 can be detachably connected to the towing vehicle side hitch body 30 via the upper locking pins 48, 48 and the lower locking pin 49.

また、図２〜図４に示すように、右側のヒッチ体形成片45には、第２伝動ケース３の後端部を支持する伝動ケース支持体117を後方へ向けて突設しており、同伝動ケース支持体117は、右側のヒッチ体形成片45に前端部を固設した支持体本片118と、同支持体本片118の後端部に設けたリング状の軸支片119とを具備して、同軸支持片119を第２伝動ケース３の後端部に設けた左側のボス部32の外周面にベアリング120を介して嵌合して、同ボス部32を回動自在に支持している。 As shown in FIGS. 2 to 4, the right hitch body forming piece 45 is provided with a transmission case support 117 that supports the rear end portion of the second transmission case 3 so as to protrude rearward. The transmission case support 117 includes a support main piece 118 having a front end fixed to the right hitch body forming piece 45, and a ring-shaped shaft support piece 119 provided at the rear end of the support main piece 118. The coaxial support piece 119 is fitted to the outer peripheral surface of the left boss portion 32 provided at the rear end portion of the second transmission case 3 via a bearing 120 so that the boss portion 32 can be rotated. I support it.

（支持部材部41）
支持部材部41は、図２〜図５に示すように、左右方向に伸延する耕耘部支持体50と、同耕耘部支持体50の中央部に取り付けた中央部専用取付体51と、同耕耘部支持体50の左右側部に取り付けた側部専用取付体52,52とを具備している。 (Support member 41)
As shown in FIGS. 2 to 5, the support member part 41 includes a tiller part support body 50 extending in the left-right direction, a center part dedicated attachment body 51 attached to the center part of the tiller part support body 50, and the same tiller. Side support parts 52 and 52 attached to the left and right side parts of the part support 50 are provided.

そして、耕耘部支持体50は、耕耘装置側ヒッチ体40の下端部に連設した中央部支持体形成片53と、耕耘装置側ヒッチ体40の左右側方に配置した左・右側部支持体形成片54,55と、これらの各内側端部54a,55aと中央部支持体形成片53の左右側端部53a,53bとを連結する連結片56,57とを具備して、中央部支持体形成片53と左・右側連結片56,57とにより、下方へ凸状の凹状部58を形成して、耕耘部支持体50をクランク状に形成している。 The tiller support 50 is composed of a central support forming piece 53 that is connected to the lower end of the tiller 40, and left and right supports that are arranged on the left and right sides of the tiller 40. Forming pieces 54, 55, and connecting pieces 56, 57 for connecting the respective inner end portions 54a, 55a to the left and right side end portions 53a, 53b of the central support forming piece 53, and supporting the central portion. The body forming piece 53 and the left and right connecting pieces 56 and 57 form a concave portion 58 that protrudes downward, and the tilling portion support body 50 is formed in a crank shape.

中央部支持体形成片53は、左右方向に伸延する断面四角形の角パイプ状に形成して、左右一対のヒッチ体形成片45,45の下部間に架設しており、同中央部支持体形成片53の左右側端部53a,53bは、それぞれヒッチ体形成片45,45よりも一定幅だけ外側方に位置させている。 The central support forming piece 53 is formed in the shape of a square pipe having a quadrangular section extending in the left-right direction, and is laid between the lower portions of the pair of left and right hitch body forming pieces 45, 45. The left and right end portions 53a and 53b of the piece 53 are positioned outward by a certain width from the hitch body forming pieces 45 and 45, respectively.

左側部支持体形成片54は、左右方向に伸延する断面四角形の角パイプ状に形成しており、上記中央部支持体形成片53の左側端部53aの直上方位置に一定の上下間隔D1を開けて配置し、内側端面54bを左側のヒッチ体形成片45の外側面に当接させて連設すると共に、中央部支持体形成片53の左側端部53aに、左側部支持体形成片54の右側部を、左側連結片56により一体的に連結している。 The left side support forming piece 54 is formed in a square pipe shape having a quadrangular cross section extending in the left-right direction, and a certain vertical distance D1 is provided at a position immediately above the left end 53a of the center support forming piece 53. The inner side end surface 54b is arranged in contact with the outer side surface of the left hitch body forming piece 45, and the left side support portion forming piece 54 is connected to the left end portion 53a of the center portion supporting body forming piece 53. Are connected integrally by a left connecting piece 56.

そして、左側連結片56は、中央部支持体形成片53の左側端部53aと左側部支持体形成片54の右側部との間に介設して一定の上下間隔D1を保持する上下間隔保持片60と、中央部支持体形成片53の左側端部53aと左側部支持体形成片54の右側部とを連結する前後一対の略直角三角形状の連結板61,61と、両連結板61,61の外側斜辺部と左側部支持体形成片54の下面とにわたって連結して外側方を閉塞する外側方閉塞板62とを具備しており、溶接により強固に連結している。 The left connecting piece 56 is interposed between the left end 53a of the central support member forming piece 53 and the right side of the left support member forming piece 54 to maintain a constant vertical distance D1. A pair of front and rear, substantially right triangular connection plates 61, 61 that connect the piece 60, the left end 53a of the central support forming piece 53 and the right side of the left support forming piece 54, and both connection plates 61 , 61 and an outer side closing plate 62 which is connected over the lower side of the left side support member forming piece 54 and closes the outer side, and is firmly connected by welding.

右側部支持体形成片55は、左右方向に伸延する断面四角形の角パイプ状に形成しており、前記中央部支持体形成片53の右側端部53bの直上方位置に一定の上下間隔D1を開けて配置すると共に、内側端面55bと右側のヒッチ体形成片45の外側面との間に一定の左右間隔D2を開けて配置し、中央部支持体形成片53の右側端部53bに、右側部支持体形成片55の左側部を、右側連結片57により一体的に連結している。 The right side support forming piece 55 is formed in a square pipe shape having a quadrangular cross section extending in the left-right direction, and a certain vertical distance D1 is provided at a position immediately above the right end 53b of the center support forming piece 53. Along the inner end surface 55b and the outer side surface of the right hitch body forming piece 45, it is arranged with a certain left and right distance D2 between the inner end surface 55b and the right end portion 53b of the central support forming piece 53. The left side portion of the part support forming piece 55 is integrally connected by the right connection piece 57.

そして、右側連結片57は、中央部支持体形成片53の右側端部53bと右側部支持体形成片55の左側部との間に介設して一定の上下間隔D1を保持する上下間隔保持片63と、中央部支持体形成片53の右側端部53bと右側部支持体形成片55の左側部とを連結する前後一対の連結板64,64と、両連結板64,64の外側斜辺部と右側部支持体形成片55の下面とにわたって連結して外側方を閉塞する外側方閉塞板65と、中央部支持体形成片53の右側下部を補強する断面Ｕ字状の補強片66とを具備しており、溶接により強固に連結している。 The right connecting piece 57 is interposed between the right end 53b of the central support member forming piece 53 and the left side of the right support member forming piece 55, and maintains a constant vertical distance D1. Piece 63, a pair of front and rear connecting plates 64, 64 that connect the right end 53b of the center support forming piece 53 and the left side of the right support forming piece 55, and the outer hypotenuse of both connecting plates 64, 64 An outer side closing plate 65 that is connected over the lower portion of the right side support member forming piece 55 to close the outer side, and a U-shaped reinforcing piece 66 that reinforces the lower right side of the center support member forming piece 53, And are firmly connected by welding.

このように、本実施の形態では、図５に示すように、右側のヒッチ体形成片45と、中央部支持体形成片53の右側部と、上下間隔保持片63と、右側部支持体形成片55の内側端面55bとにより前記した凹状部58を形成する一方、前記した第２伝動ケースを右側のヒッチ体形成片45の側方に沿わせて配置して、同第２伝動ケース３の少なくとも一部（本実施の形態では後部）を凹状部58内に配置している。 Thus, in the present embodiment, as shown in FIG. 5, the right hitch body forming piece 45, the right side portion of the center support body forming piece 53, the vertical spacing holding piece 63, and the right side support body forming are formed. The concave end 58 is formed by the inner end surface 55b of the piece 55, and the second transmission case is arranged along the side of the right hitch body forming piece 45, so that the second transmission case 3 At least a part (the rear part in the present embodiment) is disposed in the concave part 58.

従って、耕耘部支持体50の中途部に形成した凹状部58内に、右側のヒッチ体形成片45の側方に沿わせて配置した第２伝動ケース３の後部を配置しているため、同第２伝動ケース３と耕耘部支持体50との干渉を回避することができる。 Therefore, since the rear part of the second transmission case 3 arranged along the side of the right hitch body forming piece 45 is arranged in the concave part 58 formed in the middle part of the tillage part support body 50, the same Interference between the second transmission case 3 and the tillage part support 50 can be avoided.

その結果、耕耘部42を大型化する必要性が生じないと共に、耕耘部支持体50が畝面や畝面上の作物と接触する虞も生じない所要の地上高に、耕耘部支持体50を配置することができる。 As a result, there is no need to increase the size of the tillage part 42, and the tillage part support 50 is placed at a required ground height where there is no possibility that the tillage part support 50 will come into contact with the crop surface or the crop on the face. Can be arranged.

この際、耕耘部支持体50は、中央部支持体形成片53と左・右側部支持体形成片54,55と左・右側連結片56,57とにより凹状部58を形成しているため、かかる耕耘部支持体50を、剛性を確保したまま簡単にかつ安価に形成することができる。 At this time, the tilling part support 50 is formed with the concave part 58 by the center part support body forming piece 53, the left and right side support body forming pieces 54 and 55, and the left and right side connecting pieces 56 and 57, Such a tillage part support body 50 can be formed easily and inexpensively while ensuring rigidity.

中央部専用取付体51は、図２〜図４(b)に示すように、中央部支持体形成片53に左右摺動位置調節自在に取り付けた位置調節片70と、同位置調節片70より下方へ垂設した中央部用支持片71と、同中央部用支持片71に支持されて耕耘部42を左右側方より挟持状態に取付・支持する左右一対の取付・支持片72,72とを具備している。 As shown in FIGS. 2 to 4 (b), the center dedicated mounting body 51 includes a position adjusting piece 70 attached to the center supporting body forming piece 53 so that the left and right sliding position can be adjusted, and the position adjusting piece 70. A central support piece 71 suspended downward, and a pair of left and right attachment / support pieces 72 and 72 which are supported by the central support piece 71 to attach and support the tilling part 42 from the left and right sides. It has.

そして、位置調節片70は、中央部支持体形成片53の前面53cに沿わせて配置した直状板73と、中央部支持体形成片53の後面53dと下面53eと直状板73の下部後面とに沿わせて形成した屈曲板74と、直状板73と屈曲板74の上部同士を連結する左右一対の上部連結ボルト75,75と、直状板73と屈曲板74の下部同士を連結する左右一対の下部連結ボルト76,76と、直状板73と屈曲板74の上部間において、各上部連結ボルト75,75の外周面に嵌合した筒状のローラ77,77とを具備している。78,79は各連結ボルト75,76に螺着したナットである。 The position adjusting piece 70 includes a straight plate 73 disposed along the front surface 53c of the central support member forming piece 53, a rear surface 53d, a lower surface 53e, and a lower portion of the straight plate 73. A bent plate 74 formed along the rear surface, a pair of left and right upper connecting bolts 75, 75 that connect the upper portions of the straight plate 73 and the bent plate 74, and the lower portions of the straight plate 73 and the bent plate 74 A pair of left and right lower connecting bolts 76 and 76 to be connected, and cylindrical rollers 77 and 77 fitted to the outer peripheral surfaces of the upper connecting bolts 75 and 75 between the upper portions of the straight plate 73 and the bent plate 74 are provided. doing. Reference numerals 78 and 79 denote nuts screwed to the connecting bolts 75 and 76, respectively.

このようにして、上部連結ボルト75,75とナット78,78及び下部連結ボルト76,76とナット79,79を弛めることにより、位置調節片70を中央部支持体形成片53に沿わせて左右方向に摺動させることができる一方、所要の位置にて上部連結ボルト75,75とナット78,78及び下部連結ボルト76,76とナット79,79を締め付けることにより、位置調節片70を中央部支持体形成片53に固定することができる。 In this way, by loosening the upper connecting bolts 75 and 75 and the nuts 78 and 78 and the lower connecting bolts 76 and 76 and the nuts 79 and 79, the position adjusting piece 70 is moved to the left and right along the central support forming piece 53. While the upper connecting bolts 75 and 75 and the nuts 78 and 78 and the lower connecting bolts 76 and 76 and the nuts 79 and 79 are tightened at a required position, the position adjusting piece 70 can be slid in the center. It can be fixed to the support forming piece 53.

従って、位置調節片70を所要の位置まで摺動させて固定することにより、同位置調節片70に中央部用支持片71と取付・支持片72,72とを介して支持される耕耘部42の位置調節を任意に行うことができる。 Therefore, by slidably fixing the position adjusting piece 70 to a required position, the tilling portion 42 supported by the position adjusting piece 70 via the central support piece 71 and the attachment / support pieces 72 and 72 is supported. The position can be adjusted arbitrarily.

この際、各上部連結ボルト75,75の外周面に嵌合した筒状のローラ77,77が、中央部支持体形成片53の上面上を転動するため、耕耘部42は、中央部支持体形成片53に支持された状態にて、スムーズに摺動位置調節することができる。 At this time, since the cylindrical rollers 77 and 77 fitted to the outer peripheral surfaces of the upper connecting bolts 75 and 75 roll on the upper surface of the central support body forming piece 53, the tillage portion 42 is supported by the central portion. The sliding position can be adjusted smoothly while being supported by the body forming piece 53.

中央部用支持片71は、屈曲板74の下面に左右一対の中央部用支持板71a,71aの基端部（上端部）を取り付け、両中央部用支持板71a,71aの先端部（下端部）を下方へ伸延させて、両先端部間に左右一対の取付・支持片72,72の基端部（前端部）を連設するための連設板71bを一体成形している。 The center support piece 71 is attached to the bottom surface of the pair of left and right center support plates 71a and 71a on the lower surface of the bent plate 74, and the front end (lower end) of both center support plates 71a and 71a. The connecting plate 71b for connecting the base end portions (front end portions) of the pair of left and right mounting / supporting pieces 72, 72 between the tip portions is integrally formed.

左右一対の取付・支持片72,72は、上記連設板71bに基端部を連設し、先端部（後端部）を後方へ向けて伸延させて形成して、後述する耕耘部42の耕耘伝動ケースの前後幅よりも広幅となして、同耕耘伝動ケースを左右側方から挟持すると共に、左右方向に伸延する挟持・取付ボルト80,80,80により左右一対の取付・支持片72,72を共締めして耕耘伝動ケース82を取付・支持している。 The pair of left and right mounting / supporting pieces 72, 72 are formed by connecting the base end portion to the connecting plate 71b and extending the front end portion (rear end portion) rearward, and a tilling portion 42 described later. A pair of left and right mounting / supporting pieces 72 by holding / mounting bolts 80, 80, 80 extending in the left-right direction while holding the tilling transmission case from the left and right sides. , 72 are fastened together to attach and support the tillage transmission case 82.

側部専用取付体52,52は、図２〜図４(a)に示すように、左・右側部支持体形成片54,55に左右摺動位置調節自在に取り付けた位置調節片70,70と、同位置調節片70,70より下方へ垂設した側部用支持片81,81と、各側部用支持片81,81に支持されて耕耘部42,42を左右側方より挟持状態に取付・支持する取付・支持片72とを具備している。 As shown in FIGS. 2 to 4 (a), the side-dedicated mounting bodies 52, 52 are position adjustment pieces 70, 70 attached to the left and right side support body forming pieces 54, 55 so that the left and right sliding positions can be adjusted. And side support pieces 81, 81 suspended downward from the same position adjustment pieces 70, 70, and supported by the respective side support pieces 81, 81 so as to sandwich the tillage parts 42, 42 from the left and right sides. And a mounting / supporting piece 72 for mounting / supporting.

ここで、側部専用取付体52と前記した中央部専用取付体51とは、側部用支持片81と中央部用支持片71とが異なるだけで、他の構成部材は共通している。 Here, the side dedicated mounting body 52 and the above-described central dedicated mounting body 51 are different from each other only in the side support piece 81 and the central support piece 71, and other constituent members are common.

そこで、側部支持片81について説明すると、同側部支持片81は、屈曲板74の下面に左右一対の側部用支持板81a,81aの基端部（上端部）を取り付け、両中央部用支持板81a,81aの先端部（下端部）を下方へ伸延させて、両先端部間に左右一対の取付・支持片72,72の基端部（前端部）を連設するための連設板81bを一体成形している。 Therefore, the side support piece 81 will be described. The side support piece 81 has a base end portion (upper end portion) of a pair of left and right side support plates 81a, 81a attached to the lower surface of the bending plate 74, and both center portions. For extending the distal ends (lower ends) of the support plates 81a, 81a downward and connecting the base ends (front ends) of the pair of left and right mounting / support pieces 72, 72 between the distal ends. The mounting plate 81b is integrally formed.

そして、左右一対の側部用支持板81a,81aは、その上下幅を、中央部支持体形成片53と左・右側部支持体形成片54,55との上下間隔D1に中央部支持体形成片53の上下幅を加えた値と略同一に設計している。 The pair of left and right side support plates 81a, 81a is formed with a center support at the vertical distance D1 between the center support support forming piece 53 and the left / right support support forming pieces 54, 55. It is designed to be substantially the same as the value obtained by adding the vertical width of the piece 53.

このようにして、図４(a)(b)に示すように、中央部支持体形成片53に中央部専用取付体51を介して取り付けられる耕耘部42と、左・右側部支持体形成片54,55に側部専用取付体52,52を介して取り付けられる耕耘部42の地上高が同一になると共に、各取付体51,52,52の取付・支持片72,72,72,72,72,72と耕耘伝動ケース82,82,82との取付個所を共通化している。 In this way, as shown in FIGS. 4 (a) and 4 (b), the cultivating part 42 attached to the central part support body forming piece 53 via the central part exclusive attachment body 51, and the left and right side support body forming pieces. The ground height of the cultivating part 42 attached to the side parts 54, 55 via the side-specific attachments 52, 52 is the same, and the attachment / support pieces 72, 72, 72, 72, 72,72 and tillage transmission case 82,82,82 are shared.

従って、中央部専用取付体71ないしは側部専用取付体81を使用することにより、共通の耕耘部42,42,42を中央部と左・右側部のいずれにおいても取り付けることができるため、中央部専用ないしは側部専用の耕耘部42をそれぞれ用意する必要性がなく、コスト的に有利となる。 Therefore, by using the center-specific mounting body 71 or the side-specific mounting body 81, the common tillage part 42, 42, 42 can be mounted on both the central part and the left and right side parts. There is no need to prepare a dedicated or side-specific tilling part 42, which is advantageous in terms of cost.

（耕耘部42）
耕耘部42は、図１及び図４に示すように、耕耘伝動ケース82と、同耕耘伝動ケース82に左右一対の取付・支持片72,72を介して前端部を取り付けたロータリフレーム83と、同ロータリフレーム83の下側縁部に取り付けたロータリカバー84と、同ロータリフレーム83の後端部に尾輪支持体85を介して取り付けた尾輪86とを具備している。 (Tilling part 42)
As shown in FIGS. 1 and 4, the cultivating portion 42 includes a cultivating transmission case 82, a rotary frame 83 having a front end portion attached to the cultivating transmission case 82 via a pair of left and right attachment / support pieces 72, 72, A rotary cover 84 attached to the lower edge of the rotary frame 83 and a tail wheel 86 attached to the rear end of the rotary frame 83 via a tail wheel support 85 are provided.

そして、耕耘伝動ケース82は、図２及び図３に示すように、上下方向に伸延させて形成したケース本体87の上部に、左右方向に軸線を向けた左右一対のボス部90,90を連通連設し、両ボス部90,90内にベアリング91,91を介して左右方向に伸延する筒状の嵌合片92を回動自在に支持して、同嵌合片92を入力部材となすと共に、同嵌合片92の外周面中央部に出力スプロケット93を一体成形している。 As shown in FIGS. 2 and 3, the tillage transmission case 82 communicates with a pair of left and right boss portions 90, 90 with the axis line in the left-right direction on the upper portion of the case body 87 formed by extending in the up-down direction. A cylindrical fitting piece 92 that is provided in series and extends in the left and right directions via bearings 91 and 91 in both boss portions 90 and 90 is rotatably supported, and the fitting piece 92 serves as an input member. At the same time, an output sprocket 93 is integrally formed at the center of the outer peripheral surface of the fitting piece 92.

一方、ケース本体87の下部には、左右一対のボス部94,94を連通連設し、両ボス部94,94内にベアリング（図示せず）を介して左右方向に伸延する耕耘軸95を回動自在に支持して、同耕耘軸95の外周面中央部に入力スプロケット96を取り付け、同入力スプロケット96と上記出力スプロケット93との間に耕耘伝動チェン97を巻回している。 On the other hand, a pair of left and right boss portions 94, 94 are connected to the lower portion of the case body 87, and a tilling shaft 95 extending in the left-right direction via bearings (not shown) is inserted into both boss portions 94, 94. An input sprocket 96 is attached to the central portion of the outer peripheral surface of the tillage shaft 95 while being rotatably supported, and a tillage transmission chain 97 is wound between the input sprocket 96 and the output sprocket 93.

そして、耕耘軸95は、ボス部94,94よりも左右外側方へ突出させて左・右側突出端部95a,95bを形成しており、各突出端部95a,95bには、筒状ないしはパイプ状に形成した耕耘爪軸98の側端部を抜き差し自在に嵌合すると共に、連結ピン99を介して固定することができるようにしている。 The tillage shaft 95 protrudes left and right outward from the boss portions 94 and 94 to form left and right protruding end portions 95a and 95b. Each protruding end portion 95a and 95b has a cylindrical or pipe shape. A side end portion of the tilling claw shaft 98 formed in a shape is detachably fitted and can be fixed via a connecting pin 99.

本実施の形態では、図２及び図３に示すように、左右方向に隣接して対向する耕耘軸95,95の左・右側突出端部95a,95b間に左右方向に長尺に形成した耕耘爪軸98,98を着脱自在に架設し、左右最外側の耕耘軸95,95の左・右側突出端部95a,95bにそれぞれ左右方向に短尺の耕耘爪軸98,98を着脱自在に取り付けている。116は、耕耘爪軸98の外周面に着脱自在に突設した耕耘爪である。 In this embodiment, as shown in FIG. 2 and FIG. 3, the tiller formed in the left-right direction between the left and right protruding end portions 95a, 95b of the tilling shafts 95, 95 adjacent to each other adjacent in the left-right direction. Claw shafts 98 and 98 are detachably mounted, and short tiller claw shafts 98 and 98 are detachably attached to the left and right protruding end portions 95a and 95b of the left and right outermost cultivation shafts 95 and 95, respectively. Yes. Reference numeral 116 denotes a cultivating claw projecting detachably on the outer peripheral surface of the cultivating claw shaft 98.

このようにして、耕耘軸95に耕耘爪軸98を装着することにより、図６に示すように、全面耕耘作業も行うことができ、後述するように多用途の作業に適応させることができる。 By attaching the tilling claw shaft 98 to the tilling shaft 95 in this manner, as shown in FIG. 6, the entire tilling operation can be performed, and it can be adapted to multipurpose operations as described later.

この際、中央部の耕耘伝動ケース82の耕耘軸95により耕耘爪軸98,98を支持しているため、左右側の耕耘爪軸98,98をそれぞれ両持ち状態に支持することができて、各耕耘爪軸98,98の強度を良好に確保することができる。 At this time, since the tilling claw shafts 98 and 98 are supported by the cultivation shaft 95 of the cultivation transmission case 82 in the central portion, the left and right cultivation claw shafts 98 and 98 can be supported in a both-end supported state, The strength of each tilling nail shaft 98, 98 can be ensured satisfactorily.

（伝動機構部43）
伝動機構部43は、図２〜図４に示すように、左側に配置した耕耘伝動ケース82の嵌合片92と、中央部に配置した耕耘伝動ケース82の嵌合片92とに、左右方向に伸延する左側伝動軸100を貫通させ、同左側伝動軸100の右側端部に設けた嵌合・連結片101を、第２伝動ケース３の後端部より左右側方へ突出させている出力軸34の左側突出端部34aに嵌合させると共に、連結ピン102を介して着脱自在に連結している。 (Transmission mechanism 43)
As shown in FIGS. 2 to 4, the transmission mechanism 43 is provided in a left-right direction with a fitting piece 92 of the tilling transmission case 82 arranged on the left side and a fitting piece 92 of the tilling transmission case 82 arranged at the center. The left transmission shaft 100 extending through the left transmission shaft 100 is penetrated, and the fitting / connecting piece 101 provided at the right end portion of the left transmission shaft 100 is projected from the rear end portion of the second transmission case 3 to the left and right sides. The shaft 34 is fitted to the left protruding end portion 34a and is detachably connected via a connecting pin 102.

一方、右側に配置した耕耘伝動ケース82の嵌合片92に、左右方向に伸延する右側伝動軸103の右側端部を貫通させ、同右側伝動軸103の左側端部に設けた嵌合・連結片104を、上記出力軸34の右側突出端部34bに嵌合させると共に、連結ピン105を介して着脱自在に連結している。 On the other hand, the right end of the right transmission shaft 103 extending in the left-right direction is passed through the fitting piece 92 of the tillage transmission case 82 arranged on the right side, and the fitting / connection is provided at the left end of the right transmission shaft 103 The piece 104 is fitted to the right protruding end 34b of the output shaft 34 and is detachably connected via a connecting pin 105.

そして、左・右側伝動軸100,103は、左右方向に伸延する出力軸34の軸線と同一軸線上に配置すると共に、同出力軸34に連動連結している。 The left and right transmission shafts 100 and 103 are arranged on the same axis as the axis of the output shaft 34 extending in the left-right direction, and are interlocked with the output shaft 34.

また、各伝動軸100,103は、断面角形（本実施の形態では六角形）に形成する一方、各嵌合片92,92,92の内周面形状は、各伝動軸100,103の断面角形と整合する形状に形成して、各伝動軸100,103上にて各嵌合片92,92,92を軸線方向に摺動自在となすと共に、各伝動軸100,103と各嵌合片92,92,92とが軸線廻りに一体回動するようにしている。106,107は左・右側伝動軸100,103をそれぞれ被覆すると共に、左右方向に伸縮自在となした蛇腹状被覆体である。 Each transmission shaft 100, 103 is formed in a square cross section (in this embodiment, a hexagon), while the inner peripheral surface shape of each fitting piece 92, 92, 92 is aligned with the cross sectional square shape of each transmission shaft 100, 103. The fitting pieces 92, 92, 92 are slidable in the axial direction on the transmission shafts 100, 103, and the transmission shafts 100, 103 and the fitting pieces 92, 92, 92 are axial lines. It is designed to rotate as a whole. Reference numerals 106 and 107 denote bellows-like coverings that cover the left and right transmission shafts 100 and 103, respectively, and are extendable in the left-right direction.

このようにして、各嵌合片92は、各伝動軸100,103に左右方向に摺動自在に嵌合して、各伝動軸100,103を上記出力軸34と協働して支持するようにしている。 In this way, each fitting piece 92 is fitted to each transmission shaft 100, 103 so as to be slidable in the left-right direction, and supports each transmission shaft 100, 103 in cooperation with the output shaft 34.

そして、各耕耘部42を耕耘部支持体50に沿わせて摺動位置調節した際にも、各嵌合片92は各伝動軸100,103に沿って摺動すると共に嵌合状態を保持して、伝動機能を良好に確保することができる。 And also when adjusting the sliding position along each tillage part 42 along the tillage part support 50, each fitting piece 92 slides along each transmission shaft 100, 103 and holds the fitting state, Good transmission function can be secured.

また、左・右側の耕耘部42,42を取り外す際には、各耕耘部42,42を耕耘部支持体50の左・右側部支持体形成片54,55に沿わせて外側方へ摺動させて、各支持体形成片54,55の外側端部より引き抜くことにより、簡単に取り外すことができる。 Also, when removing the left and right tillage sections 42, 42, slide each tillage section 42, 42 outward along the left and right support section 54, 55 of the tillage section support body 50. Then, it can be easily removed by pulling it out from the outer end of each of the support forming pieces 54, 55.

この際、各嵌合片92,92は、各伝動軸100,103の外側端部より引き抜かれることになる。 At this time, the fitting pieces 92 and 92 are pulled out from the outer end portions of the transmission shafts 100 and 103, respectively.

また、左・右側の耕耘部42,42を取り付ける際にも、上記した手順を反対にたどることにより、簡単に取り付けることができる。 In addition, when attaching the left and right tillage parts 42, 42, the above procedure can be followed in the reverse order.

ここで、本実施の形態では、最外側に位置する左・右側の耕耘部42,42より外側方へ突出する各伝動軸100,103の外側端部を被覆体108,109により被覆すると共に、各被覆体108,109は各耕耘部42,42に連結して、各耕耘部42,42と一体的に移動するようにしている。 Here, in the present embodiment, the outer ends of the transmission shafts 100 and 103 projecting outward from the left and right tillage portions 42 and 42 located on the outermost sides are covered with the coverings 108 and 109, and the coverings 108 and 109 are covered. Is connected to the respective tilling parts 42, 42 so as to move integrally with the respective tilling parts 42, 42.

すなわち、各被覆体108,109は、左右方向に伸延する筒状片110,111と、外側開口端部を閉塞する蓋片112,113とからキャップ状に形成して、各耕耘部42,42の外側方のボス部90,90に内側開口端部114,115を嵌合させて連結している。 That is, each covering 108, 109 is formed into a cap shape from cylindrical pieces 110, 111 extending in the left-right direction and lid pieces 112, 113 closing the outer opening end, and the outer boss part of each tillage part 42, 42 The inner opening end portions 114 and 115 are fitted and connected to 90 and 90, respectively.

このようにして、各伝動軸100,103の外側端部を被覆する各被覆体108,109を最外側の各耕耘部42,42に連結して、各耕耘部42,42と一体的に移動するようにしているため、各耕耘部42,42を摺動位置調節した際にも、各伝動軸100,103の外側端部は被覆体により被覆された状態を保持して、自動的に常時保護された状態を保つことができる。 In this way, the covering bodies 108 and 109 covering the outer end portions of the transmission shafts 100 and 103 are connected to the outermost tilling portions 42 and 42 so as to move integrally with the tilling portions 42 and 42. Therefore, even when the sliding positions of the tillage parts 42 and 42 are adjusted, the outer end portions of the transmission shafts 100 and 103 are kept covered by the covering body, and the state is always automatically protected. be able to.

次に、上記のように構成した耕耘装置Ａの使用形態について、図６〜図１１を参照しながら説明する。 Next, a usage pattern of the tillage device A configured as described above will be described with reference to FIGS.

（１）三連・全面耕耘作業形態
図６は、前記したように、三個の耕耘部42,42,42により行う作業形態であり、三個の耕耘伝動ケース82,82,82に設けた耕耘軸95,95,95間に長尺の耕耘爪軸98,98を両持ち状態にて架設すると共に、最外側の耕耘軸95,95の各突出端部95a,95bに短尺の耕耘爪軸98,98を片持ち状態に取り付けることにより、広範囲にわたって全面耕耘作業を行うことができる。 (1) Triple / total tillage work mode FIG. 6 is a work mode performed by the three tillage portions 42, 42, 42 as described above, and is provided on the three tillage transmission cases 82, 82, 82. A long tilling pawl shaft 98, 98 is installed between the tilling shafts 95, 95, 95 in a both-sided state, and a short tilling pawl shaft is attached to each protruding end portion 95a, 95b of the outermost tilling shaft 95, 95. By attaching 98, 98 to the cantilever state, it is possible to perform the entire tillage work over a wide range.

（２）三連・二畝跨ぎ中耕作業形態
図７は、三個の耕耘部42,42,42により行う作業形態であり、三個の耕耘伝動ケース82,82,82に設けた耕耘軸95,95,95の左・右側突出端部95a,95bにそれぞれ短尺の耕耘爪軸98を片持ち状態に取付けることにより、二つの畝U,Uを跨いだ状態にて中耕作業や培土作業を行うことができる。Ｋはキャベツ等の作物である。 (2) Triple tillage straddling middle tillage work mode FIG. 7 shows a work form performed by three tillage portions 42, 42, 42, and a tilling shaft 95 provided on three tillage transmission cases 82, 82, 82. , 95, 95 left and right protruding end parts 95a, 95b can be mounted in a cantilevered state with short tillage pawl shafts 98, so that medium tillage work and soil cultivation work can be performed across two hooks U, U be able to. K is a crop such as cabbage.

（３）二連・一畝跨ぎ中耕作業形態
図８は、耕耘部支持体50から中央部の耕耘部42を取り外して、左右側二個の耕耘部42,42により行う作業形態であり、左右側の耕耘伝動ケース82,82に設けた耕耘軸95,95の左・右側突出端部95a,95bにそれぞれ短尺の耕耘爪軸98を片持ち状態に取付けることにより、幅広の一つの畝Ｕを跨いだ状態にて中耕作業や培土作業を行うことができる。 (3) Double plowing / one-plowing middle plowing work mode FIG. 8 shows a work mode that is performed by two plowing parts 42, 42 on the left and right sides by removing the central plowing part 42 from the plowing part support 50. By attaching the short tillage pawl shaft 98 to the left and right protruding ends 95a and 95b of the tillage shafts 95 and 95 provided on the side tillage transmission cases 82 and 82 in a cantilevered state, It is possible to perform medium tillage work and cultivating work while straddling.

（４）二連・畝表面耕起作業形態
図９は、耕耘部支持体50から中央部の耕耘部42を取り外して、左右側二個の耕耘部42,42により行う作業形態であり、左右側の耕耘伝動ケース82,82に設けた耕耘軸95,95の内側の突出端部95a,95b間に長尺の耕耘爪軸98を両持ち状態に取付けることにより、幅広の一つの畝Ｕの表面を、播種を行う前に耕起・細土する作業を行うことができる。 (4) Duplex / Tail Surface Plowing Work Form FIG. 9 is a work form performed by removing the central cultivation part 42 from the cultivation part support 50 and using the two right and left cultivation parts 42, 42. By attaching a long tillage claw shaft 98 between the protruding ends 95a, 95b on the inner side of the tillage shafts 95, 95 provided on the side tillage transmission cases 82, 82, one wide U The surface can be cultivated and finely ground before sowing.

この際、中央部の耕耘部42を取り外して、左右側二個の耕耘部42,42により行う作業形態であるため、中央部に残耕が生じることがなく、残耕処理作業を行う必要性がなくなるため、効率良く全面耕耘作業を行うことができる。 At this time, it is a work form that is performed by removing the central tilling part 42 and using the two left and right tilling parts 42, 42, so there is no need for the remaining tilling treatment work without causing the remaining tillage in the center part. Therefore, the entire tillage work can be performed efficiently.

（５）二連・畝立て作業形態
図１０は、耕耘部支持体50から中央部の耕耘部42を取り外して、左右側二個の耕耘部42,42により行う作業形態であり、二個の耕耘伝動ケース82,82に設けた耕耘軸95,95の左・右側突出端部95a,95a,95b,95bにそれぞれ短尺の耕耘爪軸98を片持ち状態に取付けることにより、たばこを育成する畝Ｕに堆肥を筋蒔きした後に畝立てする作業や、芋類Ｐを畝Ｕ中に置いた状態で覆土と同時に畝立てする作業を行うことができる。 (5) Double / Standing Work Form FIG. 10 is a work form performed by removing the central cultivating section 42 from the cultivating section support 50 and using the two cultivating sections 42, 42 on the left and right sides. Cultivate tobacco by attaching cantilevered pawl shafts 98 to the left and right protruding ends 95a, 95a, 95b, and 95b of the tillage shafts 95 and 95 provided in the tillage transmission cases 82 and 82, respectively. It is possible to perform the work of setting up after composting the compost on U and the work of setting up at the same time as covering with the moss P placed in the paddle U.

（６）単一・畝立て作業形態
図１１は、耕耘部支持体50から左右側の耕耘部42,42を取り外して、中央部の耕耘部42だけで行う作業形態であり、耕耘伝動ケース82に設けた耕耘軸95の左・右側突出端部95a,95aにそれぞれ長尺の耕耘爪軸98,98を片持ち状態に取付けることにより、畝立て作業や、長芋等の土寄せ作業や、畝立てと同時に行う土壌消毒等の作業を行うことができる。Ｍは畝立て器である。 (6) Single / Standing Work Form FIG. 11 is a work form in which the right and left tilling parts 42, 42 are removed from the tilling part support 50 and only the middle tilling part 42 is used. By attaching the long tillage pawl shafts 98, 98 to the left and right protruding ends 95a, 95a of the tillage shaft 95 provided in the cantilever state, At the same time, work such as soil disinfection can be performed. M is a setting device.

図１２は、他の実施形態としての耕耘部支持体50を示しており、同耕耘部支持体50は、中央部支持体形成片53の左右側端部に、上下方向に縦長四角形状に形成した連結用フランジ121,122の下部を取り付けて、両連結用フランジ121,122を上方へ立ち上がり状となすと共に、各連結用フランジ121,122の上部に、左・右側部支持体形成片54,55の内側端部を挿通するための挿通孔123,124を形成している。129は補強用リブである。 FIG. 12 shows a cultivating part support 50 as another embodiment, and the cultivating part support 50 is formed in a vertically long rectangular shape at the left and right ends of the central support forming piece 53. The lower portions of the connecting flanges 121 and 122 are attached to make both the connecting flanges 121 and 122 rise upward, and the inner ends of the left and right side support forming pieces 54 and 55 are formed on the upper portions of the connecting flanges 121 and 122, respectively. Insertion holes 123 and 124 for insertion are formed. Reference numeral 129 denotes a reinforcing rib.

一方、左・右側部支持体形成片54,55の内側端部に、上下方向に縦長四角形状に形成した連結用フランジ125,126の上部を取り付けて、両連結用フランジ125,126を下方へ垂れ下がり状となすと共に、両連結用フランジ125,126の下部に、中央部支持体形成片53の左右側端部を挿通するための挿通孔127,128を形成している。130は補強用リブである。 On the other hand, the upper ends of the connecting flanges 125 and 126 formed in a vertically long rectangular shape are attached to the inner ends of the left and right side support body forming pieces 54 and 55 so that both the connecting flanges 125 and 126 hang downward. At the same time, insertion holes 127 and 128 for inserting the left and right end portions of the central support member forming piece 53 are formed below the coupling flanges 125 and 126, respectively. 130 is a reinforcing rib.

このようにして、中央部支持体形成片53の左右側端部に取り付けた連結用フランジ121,122に、左・右側部支持体形成片54,55の内側端部に取り付けた連結用フランジ125,126を左右外側方から突き合わせるに際しては、各連結用フランジ121,122の上部に形成した挿通孔123,124中に、左・右側部支持体形成片54,55の内側端部を挿通すると共に、各連結用フランジ125,126の下部に形成した挿通孔127,128中に中央部支持体形成片53の左右側端部を挿通することにより、連結フランジ121と連結フランジ125とを面接触させた左右側重合状態となすと共に、連結フランジ122と連結フランジ126とを面接触させた左右側重合状態となすことができる。 In this way, the connecting flanges 121 and 122 attached to the left and right end portions of the center support forming piece 53 are connected to the connecting flanges 125 and 126 attached to the inner end portions of the left and right support forming pieces 54 and 55, respectively. When abutting from the outside, the inner end portions of the left and right side support body forming pieces 54, 55 are inserted into the insertion holes 123, 124 formed in the upper portions of the connection flanges 121, 122, and the connection flanges 125, 126 By inserting the left and right end portions of the central support forming piece 53 into the insertion holes 127 and 128 formed in the lower portion, the connecting flange 121 and the connecting flange 125 are brought into a surface contact state, and the connecting flange is formed. It is possible to achieve a left and right overlapping state where 122 and the connecting flange 126 are in surface contact.

そして、上記のように左右側重合状態となした連結フランジ121,125同士を連結ボルト131により連結する一方、連結フランジ122,126同士を連結ボルト132により連結することにより、耕耘部支持体50を簡単に組み付けて形成することができる。 Then, the connecting flanges 121, 125 in the left and right side overlapping state as described above are connected by the connecting bolt 131, while the connecting flanges 122, 126 are connected by the connecting bolt 132, so that the tillage part support body 50 can be easily assembled. Can be formed.

図１３は、他の実施形態としての左側伝動軸100を示しており、同左側伝動軸100は、内側伝動軸分割片133と、外側伝動軸分割片134と、両伝動軸分割片133,134を接続する筒状の接続片135と、同接続片135と各伝動分割片133,134とを連結する連結ピン136,136とを具備している。 FIG. 13 shows a left transmission shaft 100 as another embodiment, and the left transmission shaft 100 connects an inner transmission shaft segment piece 133, an outer transmission shaft segment piece 134, and both transmission shaft segment pieces 133, 134. A cylindrical connecting piece 135, and connecting pins 136 and 136 for connecting the connecting piece 135 and the transmission divided pieces 133 and 134 to each other.

そして、本実施の形態では、内側伝動軸分割片133は、中央部の耕耘部42の左右摺動位置調節に必要な最低限の長さとし、同内側伝動軸分割片131よりも外側伝動軸分割片134を長尺に形成している。 In the present embodiment, the inner transmission shaft split piece 133 has a minimum length necessary for adjusting the left-right sliding position of the central tilling portion 42, and the outer power transmission shaft split piece 131 is separated from the inner transmission shaft split piece 131. The piece 134 is formed long.

このようにして、中央部の耕耘部42を取り外す場合には、まず、右側の連結ピン136を抜いて、接続片135と内側伝動軸分割片133とを接続解除する。 In this manner, when removing the central tilling portion 42, first, the right connecting pin 136 is pulled out, and the connection piece 135 and the inner transmission shaft split piece 133 are disconnected.

そして、接続片135と外側伝動軸分割片134を左側外方へ摺動移動させて、接続片135と内側伝動軸分割片133との間に、耕耘伝動ケース82を内側伝動軸分割片133から引き抜くのに必要な空間を確保しておく。 Then, the connection piece 135 and the outer transmission shaft split piece 134 are slid and moved to the left outward, and the tillage transmission case 82 is moved from the inner transmission shaft split piece 133 between the connection piece 135 and the inner transmission shaft split piece 133. Make sure you have enough space to pull it out.

続いて、中央部の耕耘部42を中央部支持体形成片53に沿わせて左側方へ摺動移動させて、耕耘伝動ケース82を内側伝動軸分割片133から引き抜く。 Subsequently, the cultivating part 42 in the central part is slid to the left side along the central part supporting body forming piece 53, and the cultivating transmission case 82 is pulled out from the inner transmission shaft split piece 133.

その後に、中央部支持体形成片53から中央部専用取付体51を取り外すことにより、中央部の耕耘部42を取り外すことができる。 Thereafter, the central tiller 42 can be removed by removing the central dedicated mounting body 51 from the central support forming piece 53.

この際、左側の耕耘部42を取り外さなくても、中央部の耕耘部42だけを取り外すことができるため、作業形態に応じて耕耘装置Ａの使用形態を変更する作業を効率良く行うことができる。 At this time, since only the central tilling part 42 can be removed without removing the left tilling part 42, the work of changing the use form of the tilling device A can be efficiently performed according to the working form. .

本発明に係る耕耘装置の装着状態を示す側面説明図。Side surface explanatory drawing which shows the mounting state of the tillage apparatus which concerns on this invention. 同耕耘装置の一部切欠展開平面図。The partial notch expansion | deployment top view of the same tillage apparatus. 同耕耘装置の一部切欠展開背面図。The partial notch expansion | deployment rear view of the tillage apparatus. 同耕耘装置の左側面図(a)と中途部の断面左側面図(b)。A left side view of the tillage device (a) and a cross-sectional left side view of the middle part (b). 耕耘部支持体の背面図(a)と左側面図(b)と背面図(a)のI-I線断面図。FIG. 4 is a cross-sectional view taken along line II of the rear view (a), the left side view (b), and the rear view (a) of the tillage unit support. 耕耘装置の使用形態説明図（三連・全面耕耘作業形態）。Explanatory diagram of the usage mode of the tillage device (triple, full-plowing work mode). 耕耘装置の使用形態説明図（三連・二畝跨ぎ中耕作業形態）。Explanatory drawing of the usage mode of the cultivator (triple / dual cultivated medium tillage work mode). 耕耘装置の使用形態説明図（二連・一畝跨ぎ中耕作業形態）。Explanatory drawing of the usage mode of the tillage device (double / one-plowing middle tillage work mode). 耕耘装置の使用形態説明図（二連・畝表面耕起作業形態）。Explanatory drawing of the usage mode of the tillage device (double and vertical surface tillage work mode). 耕耘装置の使用形態説明図（二連・畝立て作業形態）。Explanatory drawing of the usage mode of the tillage device (double-running / raising work mode). 耕耘装置の使用形態説明図（単一・畝立て作業形態）。Explanatory drawing of the usage mode of the tillage device (single / raising work mode). 他の実施の形態としての耕耘部支持体の背面図(a)と左側面図(b)と背面図(a)のII-II線断面図。The rear view (a), left side view (b), and rear view (a) II-II sectional view of the cultivation part support body as other embodiment. 他の実施の形態としての左側伝動軸の一部切欠背面図。The partially cutaway rear view of the left transmission shaft as another embodiment.

Explanation of symbols

Ａ耕耘装置
１昇降機構
２第１伝動ケース
３第２伝動ケース
40 耕耘装置側ヒッチ体
41 支持部材部
42 耕耘部
43 伝動機構部 A Tillage device 1 Lifting mechanism 2 First transmission case 3 Second transmission case
40 Tiller side
41 Support member
42 Tillage Department
43 Transmission mechanism

Claims

In the tilling device which is connected to the rear of the towing vehicle through an elevating mechanism so as to be movable up and down, and the power is transmitted from the towing vehicle through a transmission means,
A tiller support that extends in the left-right direction is connected to the rear end of the lifting mechanism, and a tiller is attached to each of the center and left and right sides of the tiller support, and the lower part of each tiller is horizontally The tilling shafts with the axis facing are provided in a protruding manner to the left and right outer sides, and these tilling shafts are arranged on substantially the same axis extending in the left-right direction, and the tilling nail shaft is attached and detached between the tilling shafts facing in the left-right direction A cultivator that is constructed freely.

The cultivating claw shaft is detachably installed between the cultivating shafts of the left and right cultivating units with the cultivating unit being detachably attached to the cultivating unit support and the cultivating unit being removed. The tillage device according to claim 1.