JP6982810B2

JP6982810B2 - Combine harvester

Info

Publication number: JP6982810B2
Application number: JP2020028420A
Authority: JP
Inventors: 寛樹渡部; 伸二神; 正司中井; 棟張; 亮澤村; 智志北川
Original assignee: Iseki and Co Ltd
Current assignee: Iseki and Co Ltd
Priority date: 2020-02-21
Filing date: 2020-02-21
Publication date: 2021-12-17
Anticipated expiration: 2040-02-21
Also published as: JP2021132529A

Description

本発明は、コンバインの脱穀装置に関するものである。 The present invention relates to a combine harvester.

従来、脱穀装置の扱室に架設される扱胴を支持する回転軸の軸心を、扱胴の下側に設けられる受網の中心と一致させて設ける技術が提案されている。 Conventionally, a technique has been proposed in which the axis of a rotating shaft that supports a handling cylinder installed in the handling chamber of a threshing device is provided so as to coincide with the center of a receiving net provided on the lower side of the handling cylinder.

特開２０１５−１００３３９号公報Japanese Unexamined Patent Publication No. 2015-100309

しかし、特許文献１の技術においては、扱胴の回転方向の上手側に位置（時計方向の３時）する扱胴と受網の間で穀稈の詰まりが発生し、脱穀作業を中断して滞留した穀稈を取除くために脱穀作業の作業効率が低下するという問題があった。 However, in the technique of Patent Document 1, the grain culm is clogged between the handling cylinder located on the upper side in the rotation direction of the handling cylinder (3 o'clock in the clockwise direction) and the receiving net, and the threshing work is interrupted. There is a problem that the work efficiency of the threshing work is lowered because the accumulated culm is removed.

そこで、本発明の課題は、扱胴の回転方向の上手側に位置する扱胴と受網の間での穀稈の詰まりを防止して、脱穀作業の作業効率が高いコンバインの脱穀装置を提案することにある。 Therefore, an object of the present invention is to propose a combine harvester that has high work efficiency in the threshing work by preventing clogging of the grain culm between the handling cylinder located on the upper side in the rotation direction of the handling cylinder and the receiving net. To do.

上記課題を解決した本発明は次のとおりである。
すなわち、請求項１記載の発明は、穀稈を脱穀する扱室（１０）と、該扱室（１０）の下側に脱穀された穀粒を選別する選別室（２０）を備えたコンバインの脱穀装置において、
前記扱室（１０）の前後壁に回転軸（３０）を架設し、該回転軸（３０）に扱胴（１１）を支持して、該扱胴（１１）の外周部に、周方向と前後方向にそれぞれ所定の間隔を隔てて扱歯（５４）を設け、前記扱胴（１１）の下側に所定の間隔を隔てて受網（１２）を設け、前記扱胴（１１）の上側に、前記扱胴（１１）の上部を覆う扱胴カバー（１３）を設け、該扱胴カバー（１３）の内周部に、前後方向に所定の間隔を隔てて複数の送塵板（１４）を設け、前記回転軸（３０）の軸心視において、前記扱胴（１１）を円形状に形成し、前記受網（１２）を扱胴（１１）の下部に沿って略半円形状に形成し、左右方向において、前記扱歯（５４）が上昇移動する側よりも、前記扱歯（５４）側が下降移動する側での前記扱歯（５４）の歯先と前記受網（１２）の内側面の隙間が大きくなるように、前記回転軸（３０）の軸心を、前記受網（１２）の中心から左右方向の一側に水平にずらして位置させ、前記送塵板（１４）を、前記扱胴（１１）の回転方向の上手側に位置する第１送塵板（１５）と、前記扱胴（１１）の回転方向の下手側に位置する第２送塵板（１６）で形成し、前記第１送塵板（１５）は、前記扱胴カバー（１３）の内周部に固定して設けられ、前記第２送塵板（１６）は、前記扱胴カバー（１３）を貫通する上下方向に延在する支持軸（１７）の下部に吊上げられて、該支持軸（１７）と共に回動可能に設けられたことを特徴とするコンバインの脱穀装置である。 The present invention that solves the above problems is as follows.
That is, the invention according to claim 1 is a combine having a handling chamber (10) for threshing grain culms and a sorting chamber (20) for sorting the threshed grains below the handling chamber (10). In the threshing device
A rotating shaft (30) is erected on the front and rear walls of the handling chamber (10), the handling cylinder (11) is supported on the rotating shaft (30), and the outer peripheral portion of the handling cylinder (11) is in the circumferential direction. The handling teeth (54) are provided at predetermined intervals in the front-rear direction, the receiving net (12) is provided below the handling cylinder (11) at predetermined intervals, and the upper side of the handling cylinder (11) is provided. A handling cylinder cover (13) covering the upper portion of the handling cylinder (11) is provided, and a plurality of dust transmission plates (14) are provided on the inner peripheral portion of the handling cylinder cover (13) at predetermined intervals in the front-rear direction. ) Is provided, the handling cylinder (11) is formed in a circular shape in the axial view of the rotating shaft (30), and the receiving net (12) is substantially semicircular along the lower portion of the handling cylinder (11). The tip of the handling tooth (54) and the receiving net (12) on the side where the handling tooth (54) moves downward rather than the side where the handling tooth (54) moves upward in the left-right direction. as the gap of the inner surface is large), the axis of said rotary shaft (30), the center is positioned shifted horizontally to one side in the lateral direction from the受網(12), said feed dust plate ( 14) are the first dust sending plate (15) located on the upper side in the rotation direction of the handling cylinder (11) and the second dust sending plate (15) located on the lower side in the rotating direction of the handling cylinder (11). 16), the first dust feed plate (15) is fixedly provided on the inner peripheral portion of the handling cylinder cover (13), and the second dust feeding plate (16) is provided on the handling cylinder cover (16). It is a combine grain removal device characterized in that it is suspended from the lower part of a support shaft (17) extending in the vertical direction penetrating (13) and rotatably provided together with the support shaft (17).

請求項１記載の発明によれば、扱室（１０）の前後壁に回転軸（３０）を架設し、回転軸（３０）に扱胴（１１）を支持して、扱胴（１１）の外周部に、周方向と前後方向にそれぞれ所定の間隔を隔てて扱歯（５４）を設け、扱胴（１１）の下側に所定の間隔を隔てて受網（１２）を設け、扱胴（１１）の上側に、扱胴（１１）の上部を覆う扱胴カバー（１３）を設け、扱胴カバー（１３）の内周部に、前後方向に所定の間隔を隔てて複数の送塵板（１４）を設け、回転軸（３０）の軸心視において、扱胴（１１）を円形状に形成し、受網（１２）を扱胴（１１）の下部に沿って略半円形状に形成し、左右方向において、扱歯（５４）が上昇移動する側よりも、扱歯（５４）側が下降移動する側での扱歯（５４）の歯先と受網（１２）の内側面の隙間が大きくなるように、回転軸（３０）の軸心を、受網（１２）の中心から左右方向の一側に水平にずらして位置させ、送塵板（１４）を、扱胴（１１）の回転方向の上手側に位置する第１送塵板（１５）と、扱胴（１１）の回転方向の下手側に位置する第２送塵板（１６）で形成し、第１送塵板（１５）は、扱胴カバー（１３）の内周部に固定して設けられ、第２送塵板（１６）は、扱胴カバー（１３）を貫通する上下方向に延在する支持軸（１７）の下部に吊上げられて、支持軸（１７）と共に回動可能に設けられたので、扱胴（１１）の扱歯（５４）が下降移動する側、すなわち、時計方向の３時から６時に位置する扱胴（１１）の扱歯（５４）の歯先と、これらの扱歯（５４）に対向する受網（１２）の内側面の間隔を広くして穀稈の詰まりを抑制して脱穀作業の作業効率を高めることができる。また、扱胴（１１）の扱歯（５４）が上昇移動する側、すなわち、時計方向の６時から９時に位置する扱胴（１１）の扱歯（５４）の歯先と、これらの扱歯（５４）に対向する受網（１２）における内側面の間隔を狭くして脱穀性能を高めることができる。さらに、穀稈の種類、穀稈の含水率の状態によって、第２送塵板（１６）の傾斜角度を調整して、穀稈を扱室（１０）の後部に搬送する高い搬送性能を維持することができる。 According to the invention according to claim 1, a rotating shaft (30) is erected on the front and rear walls of the handling chamber (10), and the handling cylinder (11) is supported on the rotating shaft (30) to support the handling cylinder (11). Handling teeth (54) are provided on the outer peripheral portion at predetermined intervals in the circumferential direction and front-rear direction, respectively, and a receiving net (12) is provided on the lower side of the handling cylinder (11) at predetermined intervals. A handling cylinder cover (13) covering the upper part of the handling cylinder (11) is provided on the upper side of the handling cylinder (11), and a plurality of dusts are sent to the inner peripheral portion of the handling cylinder cover (13) at predetermined intervals in the front-rear direction. A plate (14) is provided, the handling cylinder (11) is formed in a circular shape in the axial view of the rotating shaft (30), and the receiving net (12) is substantially semicircular along the lower portion of the handling cylinder (11). The tip of the handling tooth (54) and the inner surface of the receiving net (12) on the side where the handling tooth (54) moves downward rather than the side where the handling tooth (54) moves upward in the left-right direction. The axis of the rotating shaft (30) is displaced horizontally from the center of the receiving net (12) to one side in the left-right direction so that the gap between the two is increased, and the dust transmission plate (14) is placed on the handling cylinder (14). 11) is formed by a first dust transmission plate (15) located on the upper side in the rotation direction and a second dust transmission plate (16) located on the lower side in the rotation direction of the handling cylinder (11). The dust plate (15) is fixedly provided on the inner peripheral portion of the handling cylinder cover (13), and the second dust feeding plate (16) is a support extending in the vertical direction penetrating the handling cylinder cover (13). Since it was suspended from the lower part of the shaft (17) and rotatably provided together with the support shaft (17), the side where the handling teeth (54) of the handling cylinder (11) move downward, that is, at 3 o'clock in the clockwise direction. The distance between the tip of the handling tooth (54) of the handling cylinder (11) located at 6 o'clock and the inner surface of the receiving net (12) facing these handling teeth (54) is widened to prevent clogging of the grain. It can be suppressed and the work efficiency of the grain removal work can be improved. Further, the side where the handling teeth (54) of the handling cylinder (11) move upward, that is, the tooth tips of the handling teeth (54) of the handling cylinder (11) located from 6 o'clock to 9 o'clock in the clockwise direction, and their handling. The threshing performance can be improved by narrowing the distance between the inner side surfaces of the receiving net (12) facing the teeth (54). Further, the inclination angle of the second dust feeding plate (16) is adjusted according to the type of the grain culm and the state of the water content of the grain culm to maintain high transport performance for transporting the grain culm to the rear part of the handling chamber (10). can do.

コンバインの正面図である。It is a front view of a combine. コンバインの左側面図である。It is a left side view of the combine. コンバインの平面図である。It is a plan view of a combine. 脱穀装置の前後方向の縦断面図である。It is a vertical sectional view in the front-rear direction of a threshing device. 扱胴の左側面図である。It is a left side view of the handling cylinder. 第１実施形態の扱胴の正面図である。It is a front view of the handling cylinder of 1st Embodiment. 第２実施形態の扱胴の正面図である。It is a front view of the handling cylinder of the 2nd Embodiment. 第３実施形態の扱胴の正面図である。It is a front view of the handling cylinder of the 3rd embodiment. 送塵ガイドの正面図である。It is a front view of a dust transmission guide. 他の送塵ガイドの正面図である。It is a front view of another dust transmission guide.

図１〜３に示すように、汎用コンバインは、機体フレーム１の下側に土壌面を走行する左右一対のクローラからなる走行装置２が設けられ、機体フレーム１の前側に圃場の穀稈を収穫する刈取前処理装置３が設けられ、刈取前処理装置３の後方左側に収穫された穀稈を脱穀・選別処理する脱穀装置４が設けられ、刈取前処理装置３の後方右側に操縦者が搭乗する操縦部５が設けられている。 As shown in FIGS. 1 to 3, the general-purpose combine is provided with a traveling device 2 consisting of a pair of left and right crawlers traveling on the soil surface under the machine frame 1, and harvests culms in the field on the front side of the machine frame 1. A pre-cutting processing device 3 is provided, a threshing device 4 for threshing and sorting harvested culms is provided on the rear left side of the pre-cutting processing device 3, and an operator is on the rear right side of the pre-cutting processing device 3. The control unit 5 is provided.

操縦部５の下側にエンジンを内装するエンジンルーム６が設けられ、操縦部５の後側に脱穀・選別処理された穀粒を貯留するグレンタンク７が設けられ、グレンタンク７の後側に穀粒を外部に排出する排出オーガ８が設けられている。 An engine room 6 for incorporating an engine is provided on the lower side of the control unit 5, a grain tank 7 for storing threshed and sorted grains is provided on the rear side of the control unit 5, and a grain tank 7 is provided on the rear side of the control unit 5. A discharge auger 8 for discharging grains to the outside is provided.

刈取前処理装置３は、圃場の穀稈を起立させながら後側に搬送する搬送装置３Ａと、搬送装置３Ａの後側下部に搬送された穀稈の株元を切断する刈刃装置３Ｂと、搬送装置３Ａの後側に搬送された穀稈を左側に寄せ集めるオーガ装置３Ｃと、寄せ集められた穀稈を脱穀装置４に搬送するフィーダハウス３Ｄから構成されている。 The pre-cutting treatment device 3 includes a transport device 3A for transporting the grain culms in the field to the rear side while standing upright, a cutting blade device 3B for cutting the stock of the grain culms transported to the lower rear side of the transport device 3A. It is composed of an auger device 3C that collects the collected grain culms on the left side and a feeder house 3D that transfers the collected grain culms to the grain removal device 4.

図４に示すように、脱穀装置４は、穀稈を脱穀する扱室１０と、脱穀された穀粒を選別する選別室２０から形成されている。 As shown in FIG. 4, the threshing device 4 is formed of a handling chamber 10 for threshing grain culms and a sorting chamber 20 for sorting the threshed grains.

扱室１０の前後壁には、フィーダハウス３Ｄから搬送されてくる穀稈を脱穀する扱胴１１が架設され、扱胴１１の下側には、扱胴１１の外周下部に沿って半円弧形状に形成された受網１２が設けられている。また、扱胴１１の上部は、開閉可能な扱胴カバー１３で覆われており、扱胴カバー１３の内周部には、穀稈を扱室１０の後部に案内する送塵板１４が設けられている。 On the front and rear walls of the handling chamber 10, a handling cylinder 11 for threshing the grain culms carried from the feeder house 3D is erected, and on the lower side of the handling cylinder 11, a semi-arc shape is formed along the lower part of the outer circumference of the handling cylinder 11. The receiving net 12 formed in the above is provided. Further, the upper portion of the handling cylinder 11 is covered with a handling cylinder cover 13 that can be opened and closed, and a dust feeding plate 14 that guides the grain culm to the rear portion of the handling chamber 10 is provided on the inner peripheral portion of the handling cylinder cover 13. Has been done.

選別室２０の上部には、扱室１０から漏下してくる穀粒を選別処理する揺動選別装置２１が設けられている。揺動選別装置２１の下部には、前側から順に、揺動選別装置２１に選別風を送風する唐箕２５と、唐箕２５の後方に選別風の送風方向を変更する風割２６と、揺動選別装置２１から漏下してくる穀粒をグレンタンク７に搬送する１番螺旋２７と、揺動選別装置２１の後部から漏下してくる枝梗等が付着した穀粒を２番処理室に搬送する２番螺旋２８が設けられている。 A rocking sorting device 21 for sorting grains leaking from the handling chamber 10 is provided in the upper part of the sorting chamber 20. At the bottom of the swing sorting device 21, a wall insert 25 that blows the sorting air to the swing sorting device 21 in order from the front side, and a wind split 26 that changes the blowing direction of the sorting wind behind the wall insert 25, and a swing sorting device 21. The first spiral 27 that conveys the grain leaking from the device 21 to the grain tank 7 and the grain with the wall insert or the like leaking from the rear of the rocking sorting device 21 are transferred to the second processing chamber. A second spiral 28 for carrying is provided.

図５に示すように、扱胴１１は、扱室１０の前後壁に回転自在に支持される回転軸３０と、回転軸３０の前端部に支持されるインペラ部４０と、回転軸３０におけるインペラ部４０の後側に支持されるロータ部５０から形成されている。 As shown in FIG. 5, the handling cylinder 11 includes a rotating shaft 30 rotatably supported by the front and rear walls of the handling chamber 10, an impeller portion 40 supported by the front end portion of the rotating shaft 30, and an impeller in the rotating shaft 30. It is formed from a rotor portion 50 supported on the rear side of the portion 40.

インペラ部４０は、円形状の前板４１と、前板４１よりも径が大きい円形状の後板４２と、前板４１と後板４２の外周部を連結する側板４３から形成されている。 The impeller portion 40 is formed of a circular front plate 41, a circular rear plate 42 having a diameter larger than that of the front plate 41, and a side plate 43 connecting the front plate 41 and the outer peripheral portion of the rear plate 42.

側板４３の外周面には、インペラ部４０の前部に搬送された穀稈をインペラ部４０の後部に搬送する上下一対の搬送螺旋４４が立設されている。これにより、インペラ部４０に移送されてきた穀稈をロータ部５０に効率良く移送することができる。 On the outer peripheral surface of the side plate 43, a pair of upper and lower transport spirals 44 for transporting the grain culms transported to the front portion of the impeller portion 40 to the rear portion of the impeller portion 40 are erected. As a result, the grain culm transferred to the impeller section 40 can be efficiently transferred to the rotor section 50.

搬送螺旋４４の前面には、円周方向に所定角度を隔てて側板４３と搬送螺旋４４の前面下部を連結する略三角形状の補強リブ４５が設けられている。これにより、搬送螺旋４４の剛性を高めて、穀稈から搬送螺旋４４に加わる負荷によって搬送螺旋４４が変形するのを抑制することができる。 A substantially triangular reinforcing rib 45 is provided on the front surface of the transport spiral 44 to connect the side plate 43 and the lower front surface of the transport spiral 44 at a predetermined angle in the circumferential direction. As a result, the rigidity of the transport spiral 44 can be increased, and the transport spiral 44 can be suppressed from being deformed by the load applied to the transport spiral 44 from the grain culm.

ロータ部５０は、円筒形状のドラム５１と、ドラム５１の外周部に周方向に所定の間隔を隔てて設けられた扱歯部材５２から形成されている。扱歯部材５２は、ドラム５１の前後方向に沿って延在するパイプ形状の支持部５３と、支持部５３に前後方向に所定の間隔を隔てて設けられた複数の丸棒形状の扱歯５４から形成されている。 The rotor portion 50 is formed of a cylindrical drum 51 and a tooth handling member 52 provided on the outer peripheral portion of the drum 51 at a predetermined interval in the circumferential direction. The tooth handling member 52 includes a pipe-shaped support portion 53 extending along the front-rear direction of the drum 51, and a plurality of round bar-shaped handling teeth 54 provided on the support portion 53 at predetermined intervals in the front-rear direction. Is formed from.

＜第１実施形態の扱胴＞
図６に示すように、扱胴１１の回転軸３０の軸心を受網１２の中心よりも右側に位置させており、扱胴１１は、正面視で時計方向に回転(右回転)する。これにより、扱胴１１における右側下部、すなわち、回転軸３０の軸心視において、回転時に時計方向の６時から９時に位置する扱胴１１の扱歯５４の歯先と、これらの扱歯５４に対向する受網１２における内側面の間隔を狭くして脱穀性能を高めることができる。また、扱胴１１における左側下部、すなわち、回転軸３０の軸心視において、回転時に時計方向の３時から６時に位置する扱胴１１の扱歯５４の歯先と、これらの扱歯５４に対向する受網１２における内側面の間隔を広くして穀稈の詰まりを抑制する詰まり抑制性能を高めることができる。なお、回転軸３０の軸心視において、回転時に時計方向の３時から６時に位置する扱胴１１と受網１２の間は、扱歯５４の扱ぎ力と穀稈の自重が下方に働くために穀稈が最も詰まり易い箇所である。また、図中の矢印は、扱胴１１の回転方向を示している。 <Handling cylinder of the first embodiment>
As shown in FIG. 6, the axis of the rotation shaft 30 of the handling cylinder 11 is positioned on the right side of the center of the receiving net 12, and the handling cylinder 11 rotates clockwise (clockwise rotation) in the front view. As a result, the tooth tips of the handling teeth 54 of the handling cylinder 11 located at the lower right side of the handling cylinder 11, that is, in the axial view of the rotating shaft 30, clockwise from 6 o'clock to 9 o'clock, and these handling teeth 54. It is possible to improve the threshing performance by narrowing the distance between the inner side surfaces of the receiving net 12 facing the surface. Further, in the lower left side of the handling cylinder 11, that is, in the axial view of the rotating shaft 30, the tooth tips of the handling teeth 54 of the handling cylinder 11 located at 3 o'clock to 6 o'clock in the clockwise direction during rotation and these handling teeth 54. It is possible to increase the clogging suppressing performance of suppressing clogging of the grain culms by widening the distance between the inner surfaces of the facing nets 12. In addition, in the axial view of the rotating shaft 30, the handling force of the handling teeth 54 and the own weight of the culm act downward between the handling cylinder 11 and the receiving net 12 located clockwise from 3 o'clock to 6 o'clock during rotation. Therefore, it is the place where the grain culm is most likely to be clogged. Further, the arrows in the figure indicate the rotation direction of the handling cylinder 11.

回転軸３０の軸心視において、扱歯５４の歯先を基部よりも回転方向の上手側に位置させて支持部５３に固定されている。これにより、インペラ部４０からロータ部５０に移送されてきた穀稈をドラム５１の前部から後部に効率よく搬送することができる。また、扱歯５４は、支持部５３の径方向の内周部と外周部の２箇所で固定されている。これにより、扱歯５４を支持部５３に強固に固定することができ、扱歯５４の脱落を防止することができる。 In the axial view of the rotation shaft 30, the tooth tip of the handling tooth 54 is positioned on the upper side in the rotation direction with respect to the base portion and is fixed to the support portion 53. As a result, the grain culms transferred from the impeller section 40 to the rotor section 50 can be efficiently transported from the front portion to the rear portion of the drum 51. Further, the handling teeth 54 are fixed at two positions, an inner peripheral portion and an outer peripheral portion in the radial direction of the support portion 53. As a result, the handling tooth 54 can be firmly fixed to the support portion 53, and the handling tooth 54 can be prevented from falling off.

＜第２実施形態の扱胴＞
図７に示すように、扱胴１１の回転軸３０の軸心を受網１２の中心よりも下側に位置させている。これにより、扱胴１１の下部、すなわち、回転軸３０の軸心視において、回転時に時計方向の３時から９時に位置する扱胴１１の扱歯５４の歯先と、これらの扱歯５４に対向する受網１２における内側面の間隔を狭くして脱穀性能を高めることができる。また、扱胴１１の上部、すなわち、回転軸３０の軸心視において、回転時に時計方向の９時から３時に位置する扱胴１１の扱歯５４の歯先と扱胴カバー１３の送塵板１４の下端部の間隔を広くして穀稈を扱室１０の後部に搬送する搬送性能を高めることができる。なお、図中の矢印は、扱胴１１の回転方向を示している。 <Handling cylinder of the second embodiment>
As shown in FIG. 7, the axis of the rotating shaft 30 of the handling cylinder 11 is positioned below the center of the receiving net 12. As a result, in the lower part of the handling cylinder 11, that is, in the axial view of the rotating shaft 30, the tooth tips of the handling teeth 54 of the handling cylinder 11 located clockwise from 3 o'clock to 9 o'clock at the time of rotation and these handling teeth 54. It is possible to improve the threshing performance by narrowing the distance between the inner surfaces of the facing nets 12. Further, in the upper part of the handling cylinder 11, that is, in the axial view of the rotating shaft 30, the tooth tips of the handling teeth 54 of the handling cylinder 11 and the dust sending plate of the handling cylinder cover 13 located at 9 o'clock to 3 o'clock in the clockwise direction during rotation. It is possible to improve the transport performance of transporting the grain culm to the rear portion of the handling chamber 10 by widening the distance between the lower end portions of 14. The arrows in the figure indicate the rotation direction of the handling cylinder 11.

＜第３実施形態の扱胴＞
図８に示すように、扱胴１１の回転軸３０の軸心を受網１２の中心よりも右下側、すなわち、回転軸３０の軸心視において、扱胴１１の回転軸３０の軸心を受網１２の中心よりも４５度右下方向に延在する仮想線Ｌ上に位置させている。これにより、扱胴１１における右側下部に位置する扱胴１１の扱歯５４の歯先と、これらの扱歯５４に対向する受網１２における内側面の間隔をより狭くして脱穀性能をより高めることができる。また、扱胴１１における左側下部に位置する扱胴１１の扱歯５４の歯先と、これらの扱歯５４に対向する受網１２における内側面の間隔を広くして穀稈の詰まりを抑制する詰まり抑制性能を高めることができる。さらに、扱胴１１の上部に位置する扱胴１１の扱歯５４の歯先と扱胴カバー１３の送塵板１４の下端部の間隔を広くして穀稈を扱室１０の後部に搬送する搬送性能を高めることができる。なお、図中の矢印は、扱胴１１の回転方向を示している。 <Handling cylinder of the third embodiment>
As shown in FIG. 8, the axis of the rotating shaft 30 of the handling cylinder 11 is on the lower right side of the center of the receiving net 12, that is, in the axial view of the rotating shaft 30, the axial center of the rotating shaft 30 of the handling cylinder 11 is viewed. Is located on the virtual line L extending 45 degrees to the lower right of the center of the receiving net 12. As a result, the distance between the tooth tips of the handling teeth 54 of the handling cylinder 11 located at the lower right side of the handling cylinder 11 and the inner surface of the receiving net 12 facing these handling teeth 54 is further narrowed to further improve the threshing performance. be able to. Further, the distance between the tooth tips of the handling teeth 54 of the handling cylinder 11 located at the lower left side of the handling cylinder 11 and the inner side surface of the receiving net 12 facing these handling teeth 54 is widened to suppress clogging of the grain culm. The clogging suppression performance can be improved. Further, the distance between the tip of the tooth 54 of the handling cylinder 11 located at the upper part of the handling cylinder 11 and the lower end portion of the dust transmission plate 14 of the handling cylinder cover 13 is widened to transport the grain culm to the rear part of the handling chamber 10. The transport performance can be improved. The arrows in the figure indicate the rotation direction of the handling cylinder 11.

＜送塵板＞
次に、扱胴カバー１３の内周部に前後方向に指定の間隔を隔てて設けられた送塵板１４について説明する。図９に示すように、扱胴１１の回転方向の上手側に位置する送塵板１４の右部は、回転方向の下手側に位置する送塵板１４の左部よりも前方に設けられている。 <Dust board>
Next, a dust transmission plate 14 provided on the inner peripheral portion of the handling cylinder cover 13 at a designated interval in the front-rear direction will be described. As shown in FIG. 9, the right portion of the dust transmission plate 14 located on the upper side in the rotation direction of the handling cylinder 11 is provided in front of the left portion of the dust transmission plate 14 located on the lower side in the rotation direction. There is.

回転軸３０の軸心視において、送塵板１４の内周部（下部）は、略円弧形状に形成され、送塵板１４の右部と、これに対向する扱胴１１のロータ部５０の外周部の間隔Ａは、送塵板１４の左部と、これに対向する扱胴１１のロータ部５０の外周部の間隔Ｂよりも広く形成されている。これにより、扱胴１１と扱胴カバー１３の間における穀稈の詰まりを防止して、穀稈を扱室１０の前方右側から後方左側に効率良く搬送することができる。なお、送塵板１４の外周部は、扱胴カバー１３の内周部に固定されている。また、図中の矢印は、扱胴１１の回転方向を示している。 In the axial view of the rotating shaft 30, the inner peripheral portion (lower portion) of the dust transmission plate 14 is formed in a substantially arc shape, and the right portion of the dust transmission plate 14 and the rotor portion 50 of the handling cylinder 11 facing the right portion thereof. The distance A between the outer peripheral portions is wider than the distance B between the left portion of the dust transmission plate 14 and the outer peripheral portion of the rotor portion 50 of the handling cylinder 11 facing the left portion. As a result, clogging of the grain culm between the handling cylinder 11 and the handling cylinder cover 13 can be prevented, and the grain culm can be efficiently transported from the front right side to the rear left side of the handling chamber 10. The outer peripheral portion of the dust transmission plate 14 is fixed to the inner peripheral portion of the handling cylinder cover 13. Further, the arrows in the figure indicate the rotation direction of the handling cylinder 11.

図１０に示すように、他の送塵板１４は、扱胴１１の回転方向の上手側に位置する第１送塵板１５と、第１送塵板１５よりも扱胴１１の回転方向の下手側に位置する第２送塵板１６から形成されている。 As shown in FIG. 10, the other dust transmission plates 14 are the first dust transmission plate 15 located on the upper side in the rotation direction of the handling cylinder 11, and the other dust transmission plates 14 in the rotation direction of the handling cylinder 11 with respect to the first dust transmission plate 15. It is formed from a second dust feeding plate 16 located on the lower side.

第１送塵板１５の外周部は、扱胴カバー１３の内周部に固定されている。一方、第２送塵板１６は、扱胴カバー１３の天面部を貫通して設けられている上下方向に延在する支持軸１７に吊上げられている。また、支持軸１７は、操作レバー１８によって支持軸１７の軸心回りに回動させることができる。これにより、穀稈の種類、穀稈の含水率の状態によって、第２送塵板１６の傾斜角度を調整して、穀稈を扱室１０の後部に搬送する高い搬送性能を維持することができる。なお、図中の矢印は、扱胴１１の回転方向を示している。 The outer peripheral portion of the first dust feed plate 15 is fixed to the inner peripheral portion of the handling cylinder cover 13. On the other hand, the second dust feeding plate 16 is suspended by a support shaft 17 extending in the vertical direction provided so as to penetrate the top surface portion of the handling cylinder cover 13. Further, the support shaft 17 can be rotated around the axis of the support shaft 17 by the operation lever 18. Thereby, the inclination angle of the second dust feeding plate 16 can be adjusted according to the type of the grain culm and the state of the water content of the grain culm to maintain high transport performance for transporting the grain culm to the rear part of the handling chamber 10. can. The arrows in the figure indicate the rotation direction of the handling cylinder 11.

１０扱室
１１扱胴
１２受網
１３扱胴カバー
１４送塵板
１５第１送塵板
１６第２送塵板
２０選別室
３０回転軸
５４扱歯
Ａ間隔
Ｂ間隔
Ｌ仮想線 10 Handling chamber 11 Handling cylinder 12 Receiving net 13 Handling cylinder cover 14 Dust transmission plate
15 1st dust sending plate
16 Second dust plate 20 Sorting chamber 30 Rotating shaft 54 Handling teeth A Spacing B Spacing L Virtual line

Claims

In a combine harvester equipped with a handling room (10) for threshing grain culms and a sorting room (20) for sorting the threshed grains below the handling room (10).
A rotating shaft (30) is erected on the front and rear walls of the handling chamber (10), the handling cylinder (11) is supported on the rotating shaft (30), and the outer peripheral portion of the handling cylinder (11) is in the circumferential direction. Handling teeth (54) are provided at predetermined intervals in the front-rear direction, respectively.
A receiving net (12) is provided on the lower side of the handling cylinder (11) at a predetermined interval.
A handling cylinder cover (13) covering the upper part of the handling cylinder (11) is provided on the upper side of the handling cylinder (11).
A plurality of dust transmission plates (14) are provided on the inner peripheral portion of the handling cylinder cover (13) at predetermined intervals in the front-rear direction.
In the axial view of the rotating shaft (30), the handling cylinder (11) is formed in a circular shape, and the receiving net (12) is formed in a substantially semicircular shape along the lower portion of the handling cylinder (11).
In the left-right direction, the tooth tip of the handling tooth (54) and the inner surface of the receiving net (12) on the side where the handling tooth (54) moves downward rather than the side where the handling tooth (54) moves upward. The axis of the rotating shaft (30) is horizontally shifted to one side in the left-right direction from the center of the receiving net (12) so that the gap between the two is large .
The dust feed plate (14) is located on the upper side in the rotation direction of the handling cylinder (11) and the first dust sending plate (15) located on the lower side in the rotation direction of the handling cylinder (11). 2 Formed with a dust plate (16),
The first dust feeding plate (15) is fixedly provided on the inner peripheral portion of the handling cylinder cover (13), and the second dust feeding plate (16) penetrates the handling cylinder cover (13). A combine harvester that is suspended under a support shaft (17) extending in the vertical direction and rotatably provided together with the support shaft (17).