JP7313224B2 - Threshing device - Google Patents

Description

The present invention relates to the configuration of a sorting section in a threshing apparatus.

As disclosed in Patent Document 1, the threshing apparatus includes a threshing unit and a sorting unit arranged below the threshing unit, the harvested crops are threshed by the threshing unit, and the processed material from the threshing unit is sorted by the sorting unit.

JP 2016-36261 A

In recent years, threshing devices have become capable of threshing a large amount of crops due to improved threshing performance in the threshing section.

An object of the present invention is to provide a threshing apparatus capable of threshing a large amount of crops so that the material to be processed from the threshing section can be appropriately sorted.

The threshing apparatus of the present invention comprises a threshing section for threshing the harvested crops,right and left sidewalls and disposed between said right and left sidewalls;a first sorting unit arranged below the threshing unit and supported so as to be reciprocally movable in the front-rear direction, for sorting processed materials from the threshing unit;disposed between the right and left side walls;a second sorting unit arranged below the first sorting unit and supported so as to be reciprocally movable along the front-rear direction for sorting the processed objects from the first sorting unit;provided on the outer side of the side wall on the side opposite to the first sorting section and the second sorting section with respect to the side wall, and connected to one of the first sorting section and the second sorting section by bypassing the lower side of the lower end portion of the side wallFirst drive mechanismand provided inside the side wall on the side of the first sorting section and the second sorting section with respect to the side wall, and connected across the first sorting section and the second sorting sectionSecond drive mechanismwherein one of the first sorting section and the second sorting section is reciprocally driven by the first drive mechanism, the reciprocating drive of one of the first sorting section and the second sorting section is transmitted to the other of the first sorting section and the second sorting section via the second drive mechanism, and the other of the first sorting section and the second sorting section is driven to reciprocate.

According to the present invention, the harvested crops are threshed in the threshing section, and the processed materials fall into the lower first sorting section and are sorted.
In the first sorting section, the processed material is sorted into grains to be collected and waste straws to be discharged.
In the second sorting section, the processed material is sorted into grains to be collected and waste straws to be discharged. The grains are collected and waste straws are discharged.

According to the present invention, the processed materials from the threshing section are sorted in two stages by the first sorting section and the second sorting section, and compared to the configuration in which the processed materials from the threshing section are sorted by one large sorting section having a large area in plan view, a large number of processed materials from the threshing section can be sorted without difficulty, and the sorting performance of the threshing apparatus is improved.

According to the present invention, the first sorting section is driven to reciprocate by the first drive mechanism, and the second sorting section is driven to reciprocate by the second drive mechanism. Alternatively, the first sorting section is driven to reciprocate by the second drive mechanism, and the second sorting section is driven to reciprocate by the first drive mechanism.

As a result, the load applied to the first drive mechanism and the load applied to the second drive mechanism can be reduced compared to a configuration in which the first sorting unit and the second sorting unit are reciprocally driven by a single drive mechanism, which is advantageous in terms of improving the durability of the first drive mechanism and the second drive mechanism.
According to the present invention, the first sorting section is reciprocally driven by the first drive mechanism, and the second sorting section is reciprocally driven by the first and second drive mechanisms. Alternatively, the first drive mechanism reciprocates the second sorting section, and the second sorting section and the second drive mechanism reciprocate the first sorting section.
This causes power to flow from the first drive mechanism through the first sorting section and the second drive mechanism to the second sorting section. Alternatively, the power flows from the first drive mechanism through the second sorting section and the second drive mechanism to the first sorting section, so that the power flows in series like the flow of a single river, which is advantageous in terms of simplification of the structures of the first drive mechanism and the second drive mechanism.

In the present invention, it is preferable that the first sorting section and the second sorting section are driven to reciprocate in opposite directions.

According to the present invention, when the first sorting unit is driven forward, the second sorting unit is driven backward, and when the first sorting unit is driven backward, the second sorting unit is driven forward.
As a result, the vibration caused by the reciprocating drive of the first sorting section and the vibration caused by the reciprocating drive of the second sorting section cancel each other out, thereby suppressing the vibration of the first sorting section and the second sorting section.

In the present invention, the second drive mechanism is a drive arm that is supported so as to reciprocally swing about an arm axis extending in the left-right direction and extends to one side and the other from the arm axis, one portion of the drive arm with respect to the arm axis is connected to the first sorting portion, and the other portion of the drive arm with respect to the arm axis is connected to the second sort portion. It is preferable that the first sorting section and the second sorting section are driven to reciprocate in opposite directions by reciprocatingly driving the other of the first sorting section and the second sorting section.

According to the present invention, for example, when the drive arm is swung in one direction, the first sorting section is driven forward and the second sorting section is driven rearward, and when the drive arm is swung in the other direction, the first sorting section is driven rearward and the second sorting section is driven forward.
As a result, the structure in which the first sorting section and the second sorting section are driven to reciprocate in opposite directions can be simply constituted by the drive arm, which is advantageous in terms of structural simplification.

In the present invention, it is preferable that the first drive mechanism is a drive member that is reciprocatingly driven around an axis extending in the left-right direction, and that at least one of a connecting portion between the driving member and one of the first sorting section and the second sorting section and a connecting section between the drive arm and one of the first sorting section and the second sorting section is provided with an elastic body.

According to the present invention, since the first drive mechanism is a drive member that is reciprocatingly driven around an axis extending in the left-right direction, it is advantageous in terms of simplification of the structure of the first drive mechanism.

For example, when the drive member is connected to the first sorting section, it is assumed that the movement trajectory of the portion of the drive member connected to the first sorting section and the movement trajectory of the portion of the drive arm connected to the first sorting section are slightly different due to the positional relationship between the axis of the drive member and the axis of the drive arm.

In this state, according to the present invention, at least one of the connecting portion between the drive member and the first sorting portion and the connecting portion between the drive arm and the first sorting portion is provided with an elastic body, and the difference in movement trajectory is absorbed by the elastic deformation of the elastic body.

For example, when the drive member is connected to the second sorting section, it is assumed that the movement trajectory of the portion of the drive member connected to the second sorting section and the movement trajectory of the portion of the drive arm connected to the second sorting section are slightly different due to the positional relationship between the axis of the drive member and the axis of the drive arm.

In this state, according to the present invention, at least one of the connecting portion between the driving member and the second screening portion and the connecting portion between the driving arm and the second screening portion is provided with an elastic body, and the difference in movement trajectory is absorbed by the elastic deformation of the elastic body, so that the driving member and the driving arm are smoothly reciprocally rocked.

In the present invention, it is preferable that at least one of a member length adjusting section for adjusting a length from the axial center of the drive member to a connection portion with one of the first screening section and the second screening section and an arm length adjusting section for adjusting a length from the arm axis of the drive arm to a connection section with one of the first screening section and the second screening section is provided.

According to the present invention, for example, when the driving member is connected to the first sorting unit, at least one of a member length adjusting unit that adjusts the length of the driving member from its axis to the connecting portion with the first sorting unit and an arm length adjusting unit that adjusts the length of the driving arm from the arm axis to the connecting portion with the first sorting unit is provided.

As a result, as described above, when the movement trajectory of the portion of the drive member connected to the first screening portion and the movement trajectory of the portion of the drive arm connected to the first selection portion are slightly different, the difference in the movement trajectories can be absorbed without difficulty by adjusting one or both of the member length adjusting portion and the arm length adjusting portion by the operator in addition to the elastic body, so that the reciprocating swinging drive of the driving member and the reciprocating swinging drive of the drive arm can be performed smoothly.

According to the present invention, for example, when the driving member is connected to the second sorting unit, at least one of a member length adjusting unit that adjusts the length of the driving member from its axis to the connecting portion with the second sorting unit and an arm length adjusting unit that adjusts the length of the drive arm from the arm axis to the connecting portion with the second sorting unit is provided.

As a result, as described above, when the movement trajectory of the portion of the drive member connected to the second selection portion and the movement trajectory of the portion of the drive arm connected to the second selection portion are slightly different, the difference between the movement trajectories can be reasonably absorbed by the operator adjusting one or both of the member length adjusting portion and the arm length adjusting portion in addition to the elastic body, so that the reciprocating swinging drive of the driving member and the reciprocating swinging drive of the drive arm can be performed smoothly.

In the present invention, it is preferable that a wear prevention member is arranged between at least one of the side wall and the drive member and between the drive arm and one of the first sorting section and the second sorting section.

For example, when the side wall and the drive member are arranged close to each other, or when the drive arm and the first sorting section (second sorting section) are arranged close to each other, according to the present invention, the abrasion of the side wall and the drive member due to the contact between the side wall and the drive member is prevented by the wear prevention member, and the wear of the drive arm and the first selection section (second selection section) due to the contact between the drive arm and the first selection section (second selection section) is prevented by the wear prevention member.
In the present invention, it is preferable that the first driving mechanism is connected to the second sorting section.

It is a left view of a combine. It is a left view of a threshing device. It is a right side view of a threshing device. It is a longitudinal left side view of a threshing device. It is a longitudinal left side view of the vicinity of a winnow. It is a vertical cross-sectional left view of the vicinity of the 2nd goods collection|recovery part. It is a vertical rear view near the 1st, 3rd, and 6th airflow direction members. FIG. 11 is a left side view showing a structure for changing the spacing of the chaff lip in the first chaff sieve. FIG. 10 is a longitudinal front view showing a structure for changing the spacing of the chaff lip in the first chaff sieve. Fig. 10 is a vertical cross-sectional left side view of the vicinity of the rear wall portion of the rear end portion of the second sheave case and the connecting portion between the drive arm and the second screening portion; FIG. 5 is an exploded perspective view of a rear wall portion and a guide member of the rear end portion of the second sheave case; It is the perspective view which looked at the vicinity of the winnow case from the lower side. It is a left side view of the vicinity of a winnow. It is a left view which shows the rotation speed change part of a winnowing machine. It is a figure which shows the transmission system from an engine to a handling cylinder, a 1st screening part, and a 2nd screening part. FIG. 4 is a left side view showing a transmission chain and a tension wheel that transmit the power of the engine to the first screening section and the second screening section; It is a rear view which shows the structure which reciprocates a 1st screening part and a 2nd screening part along the front-back direction. It is a left view which shows the structure which reciprocates a 1st screening part and a 2nd screening part along the front-back direction. 4 is an exploded perspective view of the drive member; FIG. It is a vertical left side view of a drive arm. FIG. 4 is a left side view showing a reciprocating state of the first sorting section and the second sorting section; FIG. 4 is a left side view showing a reciprocating state of the first sorting section and the second sorting section;

1 to 22 show a conventional combine equipped with the threshing device of the present invention, where F indicates the forward direction, B indicates the rearward direction, U indicates the upward direction, D indicates the downward direction, R indicates the right direction, and L indicates the left direction.

(Overall configuration of combine harvester)
As shown in FIG. 1, right and left front wheels 1 are supported by the front portions of the right and left body frames 3 arranged along the longitudinal direction, and right and left rear wheels 2 are supported by the rear portions of the body frames 3. A driving part 4 is provided in the front part of the body frame 3 , and a threshing device 150 is provided in the body frame 3 .

As shown in FIGS. 2, 3, and 4, in the threshing device 150, the threshing section 5, the first sorting section 11, the second sorting section 12, and the like are provided between the right and left side walls 33. As shown in FIGS.
As shown in FIG. 1 , the grain tank 6 is provided in the upper part of the front part of the threshing part 5 , the grain tank 6 is provided with the unloader 7 , and the engine 8 is provided in the upper part of the rear part of the threshing part 5 . A feeder 9 is provided in the front part of the threshing part 5 and extends forward, and a reaping part 10 is connected to the front part of the feeder 9 .

As shown in FIG. 4 , the first sorting section 11 is provided below the threshing section 5 . A second sorting section 12 is provided below the first sorting section 11 . A first article collecting section 41 is provided below the second sorting section 12 . A second article collection section 42 is provided below the second sorting section 12 and behind the first article collection section 41 . A winnow 47 that supplies sorting air to the first sorting section 11 and the second sorting section 12 is provided below the front portion of the threshing section 5 and on the front side of the first product recovery section 41 .

As shown in FIGS. 1 and 4 , crops in a field are cut and harvested by a harvesting section 10 and supplied to a threshing section 5 through a feeder 9 . Harvested crops are threshed by the threshing unit 5 , and processed materials from the threshing unit 5 are sorted by the first sorting unit 11 and the second sorting unit 12 .

As shown in FIGS. 1 and 3 , the sorted grains as processed materials are recovered from the second sorting section 12 to the first grain recovery section 41 and supplied to the grain tank 6 by the conveying device 66 . A mixture of grains, straw waste, etc. as the sorted processed material is recovered from the second sorting unit 12 to the second material recovery unit 42, supplied to the front part of the first sorting unit 11 by the conveying device 147, and sorted again.

When the grain tank 6 is filled with grains, the harvesting work is temporarily interrupted, and the grains in the grain tank 6 are discharged to another transport vehicle (not shown) by the unloader 7, after which the harvesting work is resumed.

(Composition of the threshing part)
As shown in FIG. 4, the threshing unit 5 is provided with a threshing drum 13, a receiving net 14, a dust valve 15, etc., which are rotationally driven around a rotation axis P1 extending in the front-rear direction. A handling cylinder 13 and a receiving net 14 are arranged in a rearward upwardly inclined state, and a dust feed valve 15 is provided above the handling cylinder 13.例文帳に追加

The squeezing cylinder 13 includes a raking portion 13a for raking the harvested crops rearward, and a shaving portion 13b provided continuously to the rear portion of the raking portion 13a for shaving the crops.

The scraping portion 13a of the handling cylinder 13 is formed by providing a conical body portion 13c, a spiral portion 13d connected to the outer peripheral portion of the body portion 13c, and the like.
The handling portion 13b of the handling drum 13 is formed by providing a plurality of round pipe-shaped toothing support portions 13e arranged along the rotation axis P1, a large number of round bar-shaped toothings 13f extending radially outward from the toothing support portion 13e, and the like.

In the receiving net 14, a large number of lattices are formed by a large number of semicircular members arranged along the rotation direction of the handling cylinder 13 and a large number of bar members arranged along the rotation axis P1. The receiving net 14 is disposed below the treating portion 13b of the treating cylinder 13 and formed in a semi-cylindrical shape along the treating portion 13b of the treating cylinder 13. As shown in FIG.

As shown in FIGS. 4 and 15, the drive case 16 is connected to the rear portion of the threshing section 5, and the transmission shaft 17 protrudes from the drive case 16 to the left. The power of the engine 8 is transmitted to the transmission shaft 17 from the pulley 17a connected to the left part of the transmission shaft 17 via the transmission belt 18, and is transmitted to the handling cylinder 13 via the bevel gear mechanism 19 inside the drive case 16, so that the handling cylinder 13 is rotationally driven around the rotation axis P1.

As a result, the crops cut by the reaper 10 are conveyed by the feeder 9 toward the threshing section 5 , and are introduced into the threshing section 5 after being raked rearward by the raking section 13 a of the threshing cylinder 13 . The crops are threshed by the threshing cylinder 13 and the receiving net 14 and sent rearward by the guiding action of the dust feed valve 15 .

Treated materials such as grains and straw waste pass through the receiving net 14 and fall into the first sorting section 11 on the lower side. Straw shavings and the like which do not fall downward from the receiving net 14 and are conveyed to the rear part of the threshing section 5 are shredded by the shredding device 20 and discharged to the field.

(Construction of right and left side walls)
As shown in FIGS. 2, 3 and 4, the threshing section 5 is positioned between the right and left side walls 33, the right and left side walls 33 extending downwardly relative to the threshing section 5 and configured as described below.

As shown in FIGS. 2, 3, 12, and 13, square pipe-shaped strut members 92 are connected to the front and rear portions of the right body frame 3 and extended downward, and square pipe-shaped strut members 92 are connected and extended downward to the front and rear portions of the left body frame 3, and four strut members 92 are provided.

A horizontal frame 93 is connected over the lower portions of the front right and left support members 92 , and a horizontal frame 93 is connected over the lower portions of the rear right and left support members 92 . A horizontal frame 94 is connected across the lower portion of the right front and rear support members 92 , and a horizontal frame 94 is connected across the lower portions of the left front and rear support member 92 .

The right sidewall 33 is connected across the right fuselage frame 3, the right front and rear strut members 92, and the right lateral frame 94, and the left sidewall 33 is connected across the left fuselage frame 3, the left front and rear strut members 92, and the left lateral frame 94. The outer sides of the threshing section 5, the first sorting section 11 and the second sorting section 12 are covered by the right and left side walls 33. As shown in FIG.

At the bottom of each of the four support members 92, the configuration described below is provided.
A bottom plate 97 to which a ring member 97a is connected is connected across the lower ends of the support members 92 and the horizontal frames 93 and 94 . A triangular rib 95 is connected across the strut member 92 and the transverse frame 93 . A triangular rib 96 is connected across the strut member 92 , the lateral frame 94 and the bottom plate 97 .

A jack (not shown) can be applied to the bottom plate 97 from below so that the combine can be lifted by the jack. The front right and left bottom plates 97 are mainly used when replacing the front wheel 1 or when removing a transmission case (not shown). The rear right and left bottom plates 97 are mainly used when the rear wheel 2 is replaced.

(Configuration of first sorting unit)
As shown in FIGS. 4 and 5, the first sorting unit 11 that sorts out the processed material from the threshing unit 5 is arranged below the threshing unit 5, is arranged between the right and left side walls 33, is supported so as to be reciprocally movable in the front-rear direction, and is configured to be reciprocally driven (see (Reciprocating drive configuration of the first sorting unit and the second sorting unit) described later).

The first sorting unit 11 is provided with a first sieve case 23 having a rectangular frame shape in plan view. A first grain pan 21 that transports the processed materials to the rear side, a first chaff sieve 31 that sorts the processed materials while transporting them backward and drops them downward, and a straw rack 24 that sorts the processed materials while transporting them backward and drops them downward. It is

The first grain pan 21 is formed in a sawtooth shape when viewed from the side, and is provided at the front portion of the first sorting portion 11 (first sheave case 23) in a rearwardly upward inclined state from the front end portion of the first sorting portion 11 (first sheave case 23) toward the rear side.

A large number of elongated round bar-shaped sieve lines 44 are connected to the rear end portion 21b of the first grain pan 21 while being spaced apart in the left-right direction, and the sieve lines 44 extend rearward in a cantilever manner from the rear end portion 21b of the first grain pan 21. A wall portion 45 formed higher than the first grain pan 21 is provided at the front end portion 21 a of the first grain pan 21 .

The front end portion 31a of the first chaff sieve 31 is positioned below the sieve line 44, and the front end portion 31a of the first chaff sieve 31 and the sieve line 44 overlap in plan view. The first chaff sieve 31 is provided in the first sorting portion 11 (first sheave case 23) so as to extend rearward in a rearwardly upwardly inclined state from the rear end portion 21b of the first grain pan 21 with a gap 60 opened to the rear and lower sides.

In the vicinity of the rear end of the first chaff sheave 31, a support frame 46 is connected to the first sheave case 23 along the left-right direction. The straw racks 24 are formed in a sawtooth shape when viewed from the side, and a large number of straw racks 24 are connected to a support frame 46 while being spaced apart in the left-right direction, and extend rearward from the support frame 46 in a cantilever manner.

(Configuration of first chaff sheave)
As shown in FIGS. 5, 8, and 9, in the first sorting section 11, a large number of chaff lip 99 along the left-right direction are arranged in the first sheave case 23 so as to line up along the front-rear direction, thereby forming the first chaff sheave 31.

Elongated flat plate-like right and left support members 100 are supported in the front-rear direction on the right and left inner surface portions of the first sheave case 23, and the upper portions of the right and left end portions of the chaff lip 99 are supported by the support members 100 so as to be capable of swinging around the axis along the left-right direction.

Flat plate-shaped elongated right and left operating members 105 are arranged along the front-rear direction on the right and left inner surface portions of the first sheave case 23, and the lower portions of the right and left ends of the chaff lip 99 are connected to the operating members 105 so as to be capable of swinging around the axis along the left-right direction.

The chaff lip 99 is arranged in a rear-up inclined state when viewed from the side, and when the position of the operation member 105 is changed in the front-rear direction, the inclination angle of the chaff 99 is changed in conjunction with the operation member 105 .

When the position of the operation member 105 is changed to the rear side, the inclination angle of the chaflip 99 increases, the chaflip 99 approaches an upright position, and the interval W1 between the adjacent chaflips 99 increases. When the position of the operation member 105 is changed to the front side, the inclination angle of the chaff lip 99 becomes smaller, the chaff 99 approaches the posture lying sideways, and the interval W1 between the adjacent chaff lip 99 becomes smaller.

As shown in FIGS. 8 and 9, a plate-shaped interval changing portion 106 is supported on the outer surface portion of the left portion of the first sheave case 23 so as to be able to swing about a swing axis P8 extending in the left-right direction. An operation pin 106 a connected to the lower portion of the interval changing portion 106 is connected to the left operation member 105 through the left opening (not shown) of the first sheave case 23 .

When the interval changing portion 106 is pivoted about the pivot axis P8, the operation pin 106a of the interval changing portion 106 changes the position of the left operating member 105 in the longitudinal direction, and the right operating member 105 is changed in the longitudinal direction via the chaff lip 99.

The first chaff sieve 31 (chaff lip 99) is operated by the interval changer 106 to open the interval W1 between the adjacent chaff lip 99 and to close the interval W1.

(Structure for operating the interval changing section)
As shown in FIGS. 8 and 9 , a pin-shaped connecting portion 106 b is connected to the upper portion of the interval changing portion 106 . A boss portion 107 is provided, and a bracket 107a connected to the boss portion 107 is connected to a connecting portion 106b of the interval changing portion 106 so as to be able to swing.

A rod portion 108 is connected to a bracket 23a connected to the left outer surface portion of the first sheave case 23 so as to be able to swing vertically, and the rod portion 108 is inserted into the boss portion 107 and extended rearward. Thereby, the rod portion 108 is connected to the first screening portion 11 and slidably inserted into the boss portion 107 .

A coil spring 109 is provided, a rod portion 108 is inserted into the coil spring 109, and the coil spring 109 is provided between a spring bearing portion 108a provided on the rod portion 108 and a boss portion 107 in a state of being compressed with respect to its free length.

Coil spring 109 attempts to extend from a compressed state with respect to its free length, thereby operating interval changing portion 106 counterclockwise in FIG.

A support plate 113 is connected to the outer surface of the left side wall 33 . An operation gear 114 is supported by a support plate 113 so as to be able to swing about an axis extending in the left-right direction. The power of the electric motor 115 rotates the pinion gear 16a of the gear mechanism 116, and the pinion gear 16a of the gear mechanism 116 causes the operation gear 114 to swing.

One end of the outer 118 b of the wire 118 is connected to a bracket 113 a connected to the support plate 113 , and one end of the inner 118 a of the wire 118 is connected to the operation gear 114 .

A wire 118 extends rearward from the support plate 113 , turns forward, and extends forward between the left side wall 33 and the left portion of the second sheave case 25 . The other end of the outer 118b of the wire 118 is connected to the bracket 23b connected to the left outer surface of the first sheave case 23, and the other end of the inner 118a of the wire 118 is connected to the connecting portion 106b of the interval changing portion 106.

Thereby, the wire 118 is connected across the electric motor 115 and the interval changing portion 106 . A coil spring 109 and a wire 118 (inner 118a) are connected to the same upper portion of the interval changing portion 106 extending from the swing axis P8 and arranged side by side along each other. The coil spring 109 and the wire 118 (inner 118 a ) are connected to a common connection portion 116 b provided in the interval change portion 106 .

(State of operation of interval changing part)
As shown in FIG. 8, when the operation gear 114 is oscillated by the electric motor 115 and the inner 118a of the wire 118 is pulled toward the electric motor 115, the interval changing portion 106 is oscillated clockwise in FIG. Along with this, the coil spring 109 is compressed by the boss portion 107 and the spring receiving portion 08 a of the rod portion 108 .

When the operation gear 114 is oscillated by the electric motor 115 and the inner 118a of the wire 118 is returned toward the interval changing portion 106, the coil spring 109 expands and the interval changing portion 106 is pushed via the boss portion 107, whereby the interval changing portion 106 is oscillated counterclockwise in FIG.

A potentiometer type position sensor 117 is connected to the operating gear 114 and detects the operating angle of the operating gear 114 . By detecting the operation angle of the operation gear 114, the operation position of the interval changer 106 is detected, and the interval W1 is detected.

(Configuration of the second sorting section)
As shown in FIGS. 4, 5, and 6, the second sorting unit 12 that sorts out the processed materials from the first sorting unit 11 is arranged below the first sorting unit 11, is arranged between the right and left side walls 33, is supported so as to be reciprocally movable in the front-rear direction, and is configured to be reciprocally driven (see (Reciprocating drive configuration of the first sorting unit and the second sorting unit) described later).

The second sorting unit 12 is provided with a second sieve case 25 having a rectangular frame shape in a plan view. A second grain pan 22 that conveys the processed material to the rear side, a grain sieve 26 that drops the sorted processed material to the first item recovery unit 41, and a second chaff sieve 32 that sorts the processed material while conveying it rearward and drops it to the second item recovery unit 42. It is provided from to the rear.

The second grain pan 22 is formed in a sawtooth shape when viewed from the side, and is provided in the front portion of the second screening portion 12 (second sheave case 25) from the front end portion of the second screening portion 12 (second sheave case 25) toward the rear side. A wall portion 48 formed higher than the second grain pan 22 is provided at the front end portion of the second grain pan 22, and an upper portion 48a of the wall portion 48 is formed obliquely upward and rearward.

As described later in (Configuration of the first air passage and the first, second, and fifth air direction members), a part of the sorting wind of the winnow 47 flows rearward between the first sorting unit 11 (the rear part of the first grain pan 21) and the wall portion 48, and the wall portion 48 prevents the material to be processed from spilling down from the second grain pan 22 to the front side.

The grain sieve 26 is composed of a punching metal in which a large number of small openings are opened in a flat plate-like member, or a crimp mesh in which long and thin metal wires are woven. The grain sieve 26 is connected to the rear end portion 22a of the second grain pan 22, and is provided in the second screening portion 12 (second sieve case 25) so as to extend rearward from the rear end portion 22a of the second grain pan 22.

A large number of slender round bar-shaped sieve lines 49 formed in a sawtooth shape when viewed from the side are connected to the rear end portion 26b of the grain sieve 26 while being spaced along the left-right direction, and the sieve lines 49 extend rearward in a cantilever manner from the rear end portion 26b of the grain sieve 26.

A front end portion 32a of a second chaff sheave 32 is arranged at a position a little rearwardly away from a rear end portion 26b of the grain sheave 26, and the second chaff sheave 32 is provided in the second screening portion 12 (second sheave case 25) so as to extend rearward in a rearwardly rising inclined state.

Similarly to the first chaff sieve 31 described in (Structure of the first chaff sieve), the second chaff sieve 32 is configured by arranging a large number of chaff lip 110 along the left-right direction in the second sheave case 25 so as to line up along the front-rear direction.

As with the first chaff sieve 31 , the interval between the chaff lip 110 of the second chaff sieve 32 can be changed by changing the inclination angle of the chaff lip 110 of the second chaff sieve 32 . In this case, an operator manually changes the inclination angle (interval) of the chaflip 110 using a tool or the like.

(Structure of Rear End and Rear Wall of Second Sheave Case)
As shown in FIGS. 10 and 11, the rear end portion 132 connected to the second sheave case 25 has a flat plate shape extending in the left-right direction. A front portion 132a of the rear end portion 132 is formed in a rearwardly rising inclined state when viewed from the side, and a rear portion 132b of the rear end portion 132 is formed in a rearwardly downwardly inclined state when viewed from the side.

A rear wall portion 133 is provided on the front portion 132 a of the rear end portion 132 so as to extend over both left and right ends of the second screening portion 12 . The rear wall portion 133 is formed by bending a plate material. The rear wall portion 133 is provided with a lower portion 133a along the front portion 132a of the rear end portion 132 and an upper portion 133b extending upward from the lower portion 133a.

A lower portion 133a of the rear wall portion 133 is slidably placed along the front portion 132a of the rear end portion 132, and the rear wall portion 133 is supported by the rear end portion 132 so as to be able to change its position in the front-rear direction and in the vertical direction along the upwardly rearward inclined direction in side view.

When the rear wall portion 133 is shifted forward with respect to the rear end portion 132, the upper portion 133b of the rear wall portion 133 moves forward and downward. When the rear wall portion 133 is shifted rearward with respect to the rear end portion 132, the upper portion 133b of the rear wall portion 133 moves rearward and upward.

The rear wall portion 133 (lower portion 133a) is fixed to the rear end portion 132 by inserting and tightening the bolt 134, which is a position fixing portion, through the connecting hole of the front portion 132a of the rear end portion 132 and the long hole 133c of the rear wall portion 133. By loosening the bolt 134, the fixing of the rear wall portion 133 (lower portion 133a) is released, and the position of the rear wall portion 133 can be changed to the front side and the rear side with respect to the rear end portion 132 as described above.

(Structure of Index Portion of Second Sheave Case)
As shown in FIG. 10 , two indicator portions 135 and 136 indicating positions where the rear wall portion 133 is to be fixed are connected to the inner surface portions of the right and left portions of the rear portion of the second sheave case 25 while being spaced apart in the longitudinal direction. A nut 137 is connected to the front surface portion of the index portion 135 , and a nut 137 is connected to the rear surface portion of the index portion 136 .

The right portion of the upper portion 133b of the rear wall portion 133 is arranged between the rear right index portions 135 and 136 of the second sheave case 25, and the left portion of the upper portion 133b of the rear wall portion 133 is arranged between the rear left index portions 135 and 136 of the second sheave case 25.

When the rear wall portion 133 is shifted forward and rearward with respect to the rear end portion 132, the position where the upper portion 133b of the rear wall portion 133 contacts the index portion 135 is the frontmost position of the rear wall portion 133, and the position where the upper portion 133b of the rear wall portion 133 contacts the index portion 136 is the rearmost position of the rear wall portion 133.

The state shown in FIG. 10 is a state in which the rear wall portion 133 is positioned at the foremost position, and the bolt 138, which is a connector, is tightened across the upper portion 133b of the rear wall portion 133 and the nut 137 of the index portion 135, and the upper portion 133b of the rear wall portion 133 is connected to the index portion 135.
Thereby, the position of the rear wall portion 133 is fixed to the second sheave case 25 by the bolts 134 and 138 .

When the bolt 138 is removed from the state shown in FIG. 10 and the connection of the rear wall portion 133 is released, the position of the rear wall portion 133 can be changed rearward. With the rear wall portion 133 positioned at the rearmost position, the upper portion 133b of the rear wall portion 133 is connected to the index portion 136 by tightening the bolt 138 across the upper portion 133b of the rear wall portion 133 and the nut 137 of the index portion 136.

When the upper portion 133b of the rear wall portion 133 is positioned between the indicator portions 135 and 136 and the position of the rear wall portion 133 is fixed by the bolt 134, the upper portion 133b of the rear wall portion 133 is not connected to the indicator portions 135 and 136, and the bolt 138 is attached to the nut 137 of the indicator portion 135 or the nut 137 of the indicator portion 136.

With bolts 134 and 138 removed, rear wall 133 can be pulled rearward from rear end 132 . After this, the rear wall portion 133 is turned upside down so that the lower portion 133a of the rear wall portion 133 is placed on the front portion 132a of the rear end portion 132, and the upper portion 133b of the rear wall portion 133 is placed on the rear portion 132b of the rear end portion 132, as indicated by the dotted line in FIG. This state is close to a state in which the rear wall portion 133 does not exist.

In this state, the rear wall portion 133 is fixed to the rear end portion 132 by inserting the bolt 134 through the connecting hole of the front portion 132a of the rear end portion 132 and the long hole 133c of the rear wall portion 133 and tightening. The bolt 138 is attached to the nut 137 of the indicator portion 135 or the nut 137 of the indicator portion 136 .

(Structure of guide member)
As shown in FIGS. 4 and 6, in the second sorting section 12, a flat plate-shaped guide member 141 made of a flexible rubber plate extends from the rear end portion 26b of the grain sieve 26 toward the first article collecting section 41 arranged below the second sorting section 12 in a downwardly inclined state. Grains as processed materials from the second sorting section 12 are guided to the first grain recovery section 41 by the guide member 141 .

As shown in FIGS. 4, 10, and 11, a flat plate-like guide member 139 made of a flexible rubber plate is connected to the front portion 132a of the rear end portion 132 of the second sheave case 25, and extends downwardly forward toward the second item collecting portion 42, which is a collecting portion located below the second sorting portion 12. A mixture of grains, straw waste, and the like, which is the material to be processed from the second sorting section 12 , is guided to the second material collecting section 42 by the guide member 139 .

As shown in FIGS. 11 and 18 , right and left slits 139 b extending forward from the rear end of the guide member 139 are formed in the right and left portions of the rear end of the guide member 139 . A right outside portion 139a of the guide member 139 with respect to the right slit 139b is bent upward to enter between the right portion of the second sheave case 25 and the right side wall 33, and the right portion 139a of the guide member 139 is bolted to the right bracket 25a connected to the second sheave case 25.

A left outer portion 139a of the guide member 139 with respect to the left slit 139b is bent upward to enter between the left portion of the second sheave case 25 and the left side wall 33, and the left portion 139a of the guide member 139 is bolted to the left bracket 25a connected to the second sheave case 25.

Right and left portions 139 a of the guide member 139 form right and left leak prevention portions 140 , which are positioned above the guide member 139 between the second sheave case 25 and the side wall 33 .

As a result, in the vicinity of the rear part of the second sheave case 25, the gap between the second sheave case 25 and the side wall 33 is closed by the leakage preventing part 140, so that the processed material is less likely to leak rearward from the gap between the second sheave case 25 and the side wall 33.

(Configuration of inspection openings in right and left side walls)
As shown in FIG. 2, inspection openings 33b, 33c, 33d and 33e and inspection covers 142, 143 and 144 are provided in the left side wall 33. As shown in FIG.

When the inspection cover 142 is removed, the inspection opening 33b of the side wall 33 above the grain sieve 26 in side view and the inspection opening 33c of the side wall 33 below the grain sieve 26 in side view are opened. When the inspection opening 33b in the side wall 33 is opened, the upper portion of the grain sieve 26 can be inspected and cleaned.

When the inspection opening 33c of the side wall 33 is opened, the lower side of the grain sieve 26 is opened, so that when the removed second sorting unit 12 is inserted from the rear side of the combine, the operator can properly arrange the guide members 139 and 141 (see the above-mentioned (configuration of guide members)) in the first article collection unit 41 and the second article collection unit 42.

When the inspection cover 143 is removed and the inspection opening 33d of the side wall 33 is opened, the vicinity of the interval changer 106 (see the above-mentioned (configuration for operating the interval changer)) is opened. The operator can adjust the wire 118, the coil spring 109, and the like.

When the inspection cover 144 is removed and the inspection opening 33e of the side wall 33 is opened, the vicinity of the second chaff sheave 32 is opened. The operator can change the inclination angle of the chaff lip 110 of the second chaff sieve 32 (see the above-mentioned (configuration of the second sorting unit)).

As shown in FIG. 3 , inspection openings 33 f and 33 g and inspection covers 157 and 158 are provided in the right side wall 33 .
When the inspection cover 157 is removed and the inspection opening 33f of the side wall 33 is opened, the upper portion of the grain sieve 26 can be inspected and cleaned.

When the inspection cover 158 is removed and the inspection opening 33g of the side wall 33 is opened, when the removed first sorting unit 11 is inserted from the rear side of the combine harvester, the operator can ensure that the flexible guide member (not shown) at the front end of the threshing unit 5 is properly arranged in the first sorting unit 11.

(Structure of the first and second article collection sections and the inspection opening of the transport device)
As shown in FIGS. 5 and 12, in the bottom plate portion 145 of the first article collecting portion 41, the front end portion of the bottom plate portion 145 is supported so as to be capable of swinging and opening and closing about an axis P9 extending in the left-right direction.

By removing the connecting bolt 146 and opening the bottom plate portion 145 downward, the first article collecting portion 41 can be inspected and cleaned. As shown in FIG. 6 , the bottom plate portion 159 of the second item collecting portion 42 is also configured in the same manner as the bottom plate portion 145 of the first item collecting portion 41 .

As shown in FIG. 3, inspection openings 66a, 66b, 66c, and 66d are provided in the lower, upper, and intermediate portions of the conveying device 66 that supplies the grains collected by the first grain collecting section 41 to the grain tank 6.

A swing opening/closing inspection cover 148 covering the inspection opening 66a of the transport device 66, a detachable opening/closing inspection cover 149 covering the inspection opening 66b of the transporting device 66, a detachable opening/closing inspection cover 151 covering the inspection opening 66c of the transporting device 66, and a detachable opening/closing inspection cover 152 covering the inspection opening 66d of the transporting device 66 are provided.

Inspection openings 147a, 147b, 147c, and 147d are provided in the lower, upper, and intermediate portions of the conveying device 147 that supplies the mixture of grains, straw waste, and the like collected by the second material collecting portion 42 to the front portion of the first sorting portion 11.

A rocking open/close type inspection cover 153 that covers the inspection opening 147a of the transport device 147, a detachable open/close type inspection cover 154 that covers the inspection opening 147b of the transport device 147, a rocking open/close type inspection cover 155 that covers the inspection opening 147c of the transport device 147, and a rocking open/close type inspection cover 156 that covers the inspection opening 147d of the transport device 147 are provided.

(Construction of a winnow)
As shown in FIGS. 4 and 5, the front portion of the first sorting portion 11 is extended forward so that the front portion of the first sorting portion 11 is positioned forward of the front portion of the second sorting portion 12. The winnow 47 is provided below the front part of the threshing part 5 , below the front part of the first sorting part 11 and on the front side of the front part of the second sorting part 12 .

As shown in FIGS. 2 and 3, circular openings 33a are formed in the front portions of the right and left side walls 33, and flat right and left support frames 61 are connected across the front and rear portions of the openings 33a of the side walls 33.

As shown in FIGS. 5, 7 and 14, a drive shaft 62 is rotatably supported over right and left support frames 61, and star-shaped right and left support plates 63 are connected to the drive shaft 62 when viewed from the side. A blade plate 64 is connected to each of the arm portions of the right and left support plates 63, and the blade plate 64 is flat and has a slightly bent shape when viewed from the side. The winnow 47 is driven to rotate counterclockwise in FIG.

As shown in FIGS. 5 and 12, the winnow case 65 is provided on the upper side, the front side, and the lower side of the winnow 47, the outside of the winnow 47 is covered with the winnow case 65, and the winnow case 65 is provided with a front case part 65a and a rear case part 65b.

The right end of the front case portion 65 a of the winnow case 65 is connected to the inner surface of the right side wall 33 , and the left end of the front case portion 65 a of the winnow case 65 is connected to the inner surface of the left side wall 33 . The front end portion 14a of the receiving net 14 and the front end portion 65f of the winnow case 65 (front case portion 65a) are arranged at the same position in the longitudinal direction. A plurality of small openings 65c for draining water are formed in the bottom of the case portion 65b on the rear side of the winnow case 65. As shown in FIG.

As shown in FIG. 1, a synthetic resin cover 69 is provided outside the left side wall 33 .
A large number of small openings 69a are formed in the cover 69 at a portion of the left side wall 33 facing the opening 33a.

With the above configuration, when the winnow 47 is rotationally driven, air is introduced into the winnow 47 through the opening 33a of the side wall 33, and the sorting wind of the winnow 47 is emitted backward and obliquely upward from the vicinity of the lower part of the winnow 47, and the right and left side walls 3 as described later in (Configuration of the first air passage and the first, second, and fifth air direction members) (Configuration of the second air passage and the third, fourth, and sixth air direction members). 3 to the first sorting section 11 and the second sorting section 12 .

(Structures of the 1st and 2nd article collection sections, the front partition section, and the rear partition section)
As shown in FIGS. 4 and 5, the conveying screw 50 is provided in the first article collecting section 41 so as to be rotatable about a screw axis P5 extending in the left-right direction. A conveying screw 53 is provided in the second article collecting section 42 so as to be rotatably driven around a screw axis P6 extending in the left-right direction.

As shown in FIGS. 4, 5 and 12, a mountain-shaped front partition 54 projecting upward in side view is provided between the first article collecting section 41 and the winnow 47 . The front partition portion 54 is provided with a bottom portion 54b extending forward and obliquely downward from the top portion 54a, and an inclined portion 54c extending rearward and obliquely downward from the top portion 54a.

The inclined portion 54c of the front partition portion 54 is connected to the lower portion of the first item recovery portion 41, and the first item recovery portion 41 is provided below the second sorting portion 12 and behind the top portion 54a, which is the rear end portion of the bottom portion 54b of the front partition portion 54.

The bottom portion 54b of the front partition portion 54 is connected to the lower end portion 65d of the winnow case 65 (rear end portion of the case portion 65b), and the bottom portion 54b of the front partition portion 54 extends rearward from the lower end portion 65d of the winnow case 65 (rear end portion of the case portion 65b).

The front end of the rear case portion 65b of the winnow case 65 is overlapped with the lower end of the front case portion 65a of the winnow case 65 from the front side and bolted. The front end portion of the bottom portion 54b of the front partition portion 54 and the lower end portion 65d of the rear case portion 65b of the winnow case 65 are bent downward and butted against each other, and are connected by bolts extending in the front-rear direction. By removing the bolt, the rear case portion 65b of the winnow case 65 can be replaced with another case portion 65b.

As shown in FIGS. 4 and 6 , a mountain-shaped rear partition 55 protruding upward in side view is provided between the first article collection section 41 and the second article collection section 42 . The rear partition portion 55 is provided with a bottom portion 55b extending forward and obliquely downward from the top portion 55a, and a vertical wall portion 55c extending downward from the top portion 55a. The bottom portion 55 b of the rear partition portion 55 is connected to the lower portion of the first article collection portion 41 , and the vertical wall portion 55 c of the rear partition portion 55 is connected to the front and lower portions of the second article collection portion 42 .

(Configuration of the first air passage and the first, second, and fifth air direction members)
As shown in FIGS. 4, 5, and 7, a flat plate-like first wind direction member 71, which is an upward direction member, is provided at the rear side of the winnow 47 and at the same height as the drive shaft 62. As shown in FIGS. The first airflow direction member 71 is provided over the right and left side walls 33. The front part of the first airflow direction member 71 is formed in a rearwardly rising inclined state lower than the rear part, and the rear end part 71a of the first airflow direction member 71 extends substantially horizontally.

A fifth wind direction member 75 extends rearward and obliquely upward from an upper end portion 65 e of the winnow case 65 . A first air passage A1 is formed between the first air direction member 71 and the fifth air direction member 75, and a second air passage A2 is formed between the first air direction member 71 and the bottom portion 54b of the front partition 54.

The sorting wind from the winnow 47 is branched by the first wind direction member 71, guided to the first air passage A1, and guided between the first sorting section 11 and the second sorting section 12 by the first air passage A1.
The sorting wind from the winnow 47 is branched by the first wind direction member 71, guided to the second air passage A2, and guided to the second sorting portion 12 from below the second sorting portion 12 by the second air passage A2 as described later (Configuration of the second air passage and the third, fourth, and sixth air direction members).

A flat plate-shaped second airflow direction member 72 is arranged on the lower side of the front portion of the first sorting section 11 and on the front side of the front portion of the second sorting section 12, and is arranged between the fifth airflow direction member 75 and the wall portion 48 of the second sorting section 12. The second airflow direction member 72 is provided over the right and left side walls 33, and is formed in a rearwardly rising inclined state in which the front portion of the second airflow direction member 72 is lower than the rear portion.

In the sorting wind of the first air passage A1 , the sorting wind of the first air passage A1 passing above the second wind direction member 72 flows along the bottom of the first grain pan 21 and is guided to the gap 60 .
The sorting wind of the first air passage A1 passing below the second air direction member 72 is guided between the first sorting portion 11 and the second sorting portion 12 from between the wall portion 48 provided at the front end portion of the second sorting portion 12 and the second air direction member 72.

(Configuration of the second air passage and the third, fourth, and sixth airflow direction members)
As shown in FIGS. 4, 5, and 7, a flat plate-shaped third air direction member 73, which is a downward air direction member, is provided on the rear side of the winnow 47 and on the lower side of the first air direction member 71, and extends across the right and left side walls 33.

The third airflow direction member 73 is formed in a rear-up inclined state in which the front portion of the third airflow direction member 73 is lower than the rear portion, and is arranged along the bottom portion 54b of the front partition portion 54, and the rear end portion 73a of the third airflow direction member 73 extends downward.

A flat plate-shaped fourth airflow direction member 74 is provided at a position spaced rearward from the rear end portion 73 a of the third airflow direction member 73 and extends across the right and left side walls 33 . The fourth airflow direction member 74 is formed in a rear-up inclined state in which the front portion of the fourth airflow direction member 74 is lower than the rear portion, and is arranged along the bottom portion 54 b of the front partition portion 54 . A rear end portion 74 a of the fourth air direction member 74 extends downward and is positioned above the top portion 54 a of the front partition portion 54 .

Right and left sixth air directing members 76 are arranged between the first air directing member 71 and the third air directing member 73 . The sixth air direction member 76 has a flat plate shape with a large number of openings, and is connected to the first air direction member 71 and the third air direction member 73 in such a manner that the rear portion of the sixth air direction member 76 is closer to the left-right central portion between the right and left side walls 33 than the front portion.

The sorting wind from the winnow 47 is branched by the first air direction member 71 and guided to the second air channel A2, and the sorting wind of the second air channel A2 passes between the first air direction member 71 and the third air direction member 73, flows along the bottom of the second grain pan 22, is guided to the bottom of the grain sieve 26, and is guided to the second sorting section 12 from below the second sorting section 12.

When the sorting wind of the second air duct A2 passes between the first air direction member 71 and the third air direction member 73, the sorting wind of the second air direction A2 (the winnow 47) flowing along the right side wall 33 is guided by the right sixth air direction member 76 toward the left-right central portion between the right and left side walls 33. The wind is in a state of flowing along the right side wall 33 .

When the sorting wind of the second air duct A2 passes between the first air direction member 71 and the third air direction member 73, the sorting wind of the second air direction A2 (the winnow 47) flowing along the left side wall 33 is guided by the left sixth air direction member 76 toward the left-right central portion between the right and left side walls 33. The wind is in a state of flowing along the left side wall 33 .

Part of the sorting air of the second air passage A2 is branched by a third air direction member 73, the sorting air branched from the second air direction A2 is guided along the bottom portion 54b of the front partition portion 54 by the third air direction member 73, and guided along the bottom portion 54b of the front partition portion 54 by the fourth air direction member 74.

As a result, the sorting wind along the bottom portion 54b of the front partition portion 54 (the sorting wind branched from the second air passage A2) passes between the third air direction member 73 and the bottom portion 54b of the front partition portion 54, and between the fourth air direction member 74 and the bottom portion 54b of the front partition portion 54, and is guided to the upper portion of the first article collecting portion 41.

When the sorting wind along the bottom portion 54b of the front partition portion 54 (the sorting wind branched from the second air passage A2) passes between the third air direction member 73 and the bottom portion 54b of the front partition portion 54 and between the fourth air direction member 74 and the bottom portion 54b of the front partition portion 54, the air from between the third air direction member 73 and the fourth air direction member 74 flows along the bottom portion 54b of the front partition portion 54 (second air passage). It can be expected to join the sorting wind branched from A2.

(Structure of rotation drive of conveying screws of first and second article collecting sections)
As shown in FIGS. 2 and 15, the transmission shaft 27 is rotatably supported on the rear portion of the left side wall 33, and a transmission belt 28 is attached across a pulley 17b connected to the left portion of the transmission shaft 17 and a pulley 27a connected to the transmission shaft 27.

A relay shaft 56 is rotatably supported by the left side wall 33 , and a transmission belt 57 is attached across a pulley 56 a connected to the relay shaft 56 and a pulley 27 c connected to the transmission shaft 27 .

A pulley 50 a is connected to the right end of the conveying screw 50 , and a pulley 53 a is connected to the right end of the conveying screw 53 . A transmission belt 58 is attached across a pulley (not shown) connected to the relay shaft 56 , a pulley 50 a of the conveying screw 50 and a pulley 53 a of the conveying screw 53 . A transmission belt 59 is attached across a pulley (not shown) connected to the relay shaft 56 and a pulley 9 a provided on the left side of the feeder 9 .

As described above (configuration of the threshing section), the power transmitted to the transmission shaft 17 is transmitted to the relay shaft 56 via the transmission shaft 27 and the transmission belts 28 and 57, and is transmitted to the transport screws 50 and 53 via the transmission belt 58 to rotate the transport screws 50 and 53. The power transmitted to the relay shaft 56 is transmitted to the pulley 9 a of the feeder 9 via the transmission belt 59 and transmitted from the feeder 9 to the reaping unit 10 .

With the above configuration, when the sorted grains as the processed material fall from the second sorting unit 12 to the first grain recovery unit 41, the grains are collected by the conveying screw 50 that is driven to rotate.

When the sorted mixture of grains, straw waste, etc. as the sorted material falls from the second sorting unit 12 to the second material recovery unit 42, the mixture is recovered by the conveying screw 53 that is driven to rotate, conveyed to the right side wall 33, and supplied to the front part of the first sorting unit 11 from the outlet of the right side wall 33 by the conveying device 147 (see FIG. 3).

(Structure of rotation drive of winnow)
As shown in FIGS. 2 and 7, in the winnow 47, a split pulley type variable pulley 67 is attached to the left end of the drive shaft 62, and a transmission belt 68 is attached across the pulley (not shown) connected to the intermediate shaft 56 and the variable pulley 67. The power transmitted to the relay shaft 56 is transmitted to the variable pulley 67 via the transmission belt 68, and the winnow 47 is rotated counterclockwise in FIG.

In the variable pulley 67, by changing the interval between the opposing pulley portions and changing the radius of contact of the transmission belt 68 with the variable pulley 67, the rotation speed of the winnow 47 can be changed.

When the interval of the pulley portion of the variable pulley 67 is narrowed, the radius of contact of the transmission belt 68 with the variable pulley 67 becomes large, and the winnow 47 is driven to rotate at a low speed and the wind volume of the winnow 47 decreases. This state is suitable for a state in which there is a small amount of material to be processed.

When the interval between the pulley portions of the variable pulley 67 is widened, the radius of contact of the transmission belt 68 with the variable pulley 67 becomes small, and the winnow 47 is driven to rotate at high speed, increasing the air volume of the winnow 47 . This state is suitable for a state in which there are many objects to be processed.

As shown in FIGS. 2, 12 and 13, the transmission belt 68 is provided with two tension pulleys 70,77. A support portion 78 for supporting the tension pulleys 70 and 77 is provided, and the support portion 78 is connected to a portion of the outer surface portion of the left side wall 33 adjacent to the rear portion of the upper portion of the opening 33a of the side wall 33 .

The right and left ends of the winnow case 65 are connected to the inner surfaces of the right and left side walls 33, as described above (constitution of the winnow). The support portion 78 is connected to a portion of the outer surface portion of the left side wall 33 that faces the inner surface portion of the left side wall 33 to which the left end portion of the winnow case 65 is connected.

The supporting portion 78 is provided with a plate-like substrate 78a, a fulcrum shaft 78b connected to the substrate 78a, a reinforcing plate 78c bent into an angle and connected to the substrate 78a and the fulcrum shaft 78b, an arm 78d swingably supported around the fulcrum shaft 78b, and the like.

A substrate 78a of the support portion 78 is connected to the outer surface portion of the side wall 33 by a plurality of bolts 79, and a tension spring 80 is attached to an arm 78d of the support portion 78. As shown in FIG. The tension pulley 70 is rotatably supported by the fulcrum shaft 78b of the support portion 78, and the tension pulley 77 is rotatably supported by the arm 78d of the support portion 78. As shown in FIG.

As described above, when the distance between the pulley portions of the variable pulley 67 is changed to change the radius of contact of the transmission belt 68 with the variable pulley 67, the arm 78d of the support portion 78 and the tension pulley 77 swing so that the tension of the transmission belt 68 is maintained accordingly.

(Configuration of rotation speed changing unit capable of changing the air volume of the sorting wind of the winnow by changing the rotation speed of the winnow)
As shown in FIGS. 7, 11, 12, and 13, a reinforcing member 81 formed by bending a plate material into a channel shape is arranged behind the winnow 47 and at the same height as the drive shaft 62 and the support frame 61, and is connected to the outer surface of the left side wall 33.

As described in (Configuration of the first air passage and the first, second, and fifth air direction members) and (Configuration of the second air passage and the third, fourth, and sixth air direction members), the right and left ends of the first air direction member 71 and the right and left ends of the third air direction member 73 are connected to the inner surface portions of the right and left side walls 33.
In this case, the first airflow direction member 71 and the third airflow direction member 73 are provided across the inner surface portion of the left side wall 33 to which the reinforcing member 81 is connected, which faces the reinforcing member 81, and the inner surface portion of the right side wall 33, which faces the reinforcing member 81.

At the base of the variable pulley 67, a spacing change mechanism 82 that can change the spacing of the pulley portion of the variable pulley 67 is provided. A rotation speed changing part 83 is supported by a reinforcing member 81, and the interval changing mechanism 82 is operated by the rotation speed changing part 83 to change the rotation speed of the winnow 47 and change the air volume of the sorting wind of the winnow 47. - 特許庁

An operation gear 84, an electric motor 85, a gear mechanism 86, an operation rod 87, a position sensor 88, and the like are provided in the rotational speed changing portion 83. As shown in FIG. An operation gear 84 is supported by the reinforcing member 81 so as to be able to swing about an axis extending in the left-right direction, and an electric motor 85 and a gear mechanism 86 are connected to the reinforcing member 81 . An operation rod 87 is connected across a bracket 84 a provided on the operation gear 84 and the interval changing mechanism 82 .

The pinion gear 86a of the gear mechanism 86 is rotated by the power of the electric motor 85, the operation gear 84 is oscillated by the pinion gear 86a of the gear mechanism 86, the operation rod 87 is pushed and pulled, and the interval changing mechanism 82 is operated by the operation rod 87. Two stopper portions 81 a are connected to the reinforcement member 81 , and the operation limit of the interval changing mechanism 82 is the position where the operation gear 84 is stopped by the stopper portions 81 a of the reinforcement member 81 .

An angled support bracket 89 is connected to the stiffener 81 and a potentiometer type position sensor 88 is supported on the support bracket 89 . A position sensor 88 is provided with a detection arm 88a that can swing about the same axis as the operation gear 84 swings. When the operating gear 84 is operated to swing, the detection arm 88a of the position sensor 88 swings together, and the position of the operating gear 84 is detected by the position sensor 88. As shown in FIG.

A relay switch 90 for operating the electric motor 85 is connected to the inner surface of the reinforcing member 81 and arranged between the outer surface of the left side wall 33 and the reinforcing member 81 .
A cover 91 bent into a channel shape is connected to the reinforcing member 81 , and the rotation speed changing portion 83 is covered with the cover 91 . The front portion of the cover 91 is open and the operating rod 87 passes through the front portion of the cover 91 . The rear portion of the cover 91 is opened, and the electric motor 85 and the gear mechanism 86 protrude slightly from the rear portion of the cover 91 .

A cutout portion 91 a is provided in the front portion of the cover 91 , and the position sensor 88 protrudes from the cutout portion 91 a of the cover 91 . An opening 91b is provided in the lower portion of the cover 91 for discharging small dust or the like.

(Configuration of Reciprocating Drive of First Sorting Section and Second Sorting Section)
As shown in FIGS. 15, 17, and 18, a crankshaft 29, which is a driving part, is rotatably supported across right and left side walls 33 around an axis P2 along the left-right direction, and a transmission chain 30 is attached across a sprocket 27b connected to the transmission shaft 27 and a sprocket 29a connected to the crankshaft 29.

Right and left fulcrum shafts 98 are connected to the right and left sidewalls 33 . The right and left drive members 51, which are the first drive mechanism, are supported by a fulcrum shaft 98 so as to be reciprocally rockable about an axis P3 extending in the left-right direction, and arranged outside the right and left side walls 33. As shown in FIG. A connecting link 34 is connected across the crank portion 29 b eccentric from the axis P<b>2 of the crank shaft 29 and the upper portions of the right and left drive members 51 .

A connecting shaft 35 is connected across the lower portions of the right and left driving members 51 . The right and left connecting members 36 are connected to the linking shaft 35, the right and left connecting members 36 are connected to the rear portion of the second screening section 12 (second sheave case 25), and the drive member 51 is connected to the second screening section 12 (second sheave case 25).

The right and left drive arms 52, which are the second drive mechanism, are supported by the right and left side walls 33 and arranged inside the right and left side walls 33 so as to be reciprocally rockable about the arm axis P4 along the left-right direction. The drive arm 52 has a balance shape extending in one direction and the other direction from the arm axis P4.

A linking shaft 37 is rotatably supported over one portion of the arm axis P4 of the right and left drive arms 52, the rear portion of the first screening portion 11 (first sheave case 23) is connected to the linking shaft 37, and one portion of the arm axis P4 of the drive arm 52 is connected to the first screening portion 11 (first sheave case 23).

The other portion of the drive arm 52 with respect to the arm axis P4 is connected to the linking shaft 35, and the other portion of the drive arm 52 with respect to the arm axis P4 is connected to the second screening section 12 (second sheave case 25) via the linking shaft 35 and the connection member 36.

As shown in FIG. 5, guide portions 38 and 39 are connected to the inner surface portions of the right and left side walls 33 along the front-rear direction. The rollers 40 are supported by the right and left portions of the front portion of the first sorting section 11 (first sheave case 23 ), and the rollers 40 are supported by the guide section 38 .
The rollers 43 are supported by the right and left portions of the front portion of the second sorting section 12 (second sheave case 25 ), and the rollers 43 are supported by the guide section 39 .

A front portion of the first sorting portion 11 and a front portion of the second sorting portion 12 are supported by guide portions 38 and 39 and rollers 40 and 43 so as to be reciprocally movable in the front-rear direction. The rear portion of the first screening portion 11 and the rear portion of the second screening portion 12 are supported so as to be reciprocally movable in the front-rear direction by the reciprocating swing of the driving arm 52 about the arm axis P4. In this way, the first screening section 11 and the second screening section 12 are supported so as to be reciprocally movable along the front-rear direction.

(Construction of Tension Wheels Provided for Transmission Chain)
As shown in FIGS. 15 and 16 , a tension wheel 119 for maintaining the tension of the transmission chain 30 is provided below the transmission chain 30 . A channel-shaped support member 120 is connected to the left side wall 33 , and a pair of angle-shaped guide portions 120 a are connected to the support member 120 .

A tension wheel 119 is supported by a channel-shaped wheel support portion 121 so as to be rotatable about an axis extending in the left-right direction, and the wheel support portion 121 is arranged between guide portions 120a of the support member 120 so as to be vertically movable. A guide rod 121a connected to the wheel support portion 121 is vertically slidably inserted into a boss portion 120b of the support member 120, and a locking nut 121b is attached to the lower portion of the guide rod 121a of the wheel support portion 121.

A guide rod 121 a of the wheel support portion 121 is inserted into the coil-shaped spring 122 , and the spring 122 is provided between the wheel support portion 121 and the support member 120 in a state of being compressed with respect to its free length.

When the spring 122 tries to extend from the compressed state with respect to the free length, the tension wheel 119 and the wheel support part 121 are pushed up by the biasing force of the spring 122, and the tension wheel 119 is pressed against the lower part of the transmission chain 30, thereby maintaining the tension of the transmission chain 30. In this case, the wheel support part 121 is guided by the guide part 120a of the support member 120, and the wheel support part 121 moves up and down stably without being inclined.

(Structure of drive member)
As shown in FIGS. 17, 18, and 19, the right and left drive members 51 have a first member 101, a second member 102, a third member 103, a boss portion 104, a first connection portion 111, a second connection portion 112, and the like. The right and left driving members 51 are formed in a triangular shape when viewed from the side, and are symmetrical to each other.

The boss portion 104 is rotatably supported by the fulcrum shaft 98 so as to be rotatable around the axis P3.
The first member 101 has a plate-like shape with a larger width in the swinging direction than in the direction perpendicular to the swinging direction, and has a connecting hole 101a at its end. The first member 101 is connected to the boss portion 104 and supported so as to be able to swing around the axis P3.

The second member 102 has a plate-like shape with a larger width in the swing direction than in the direction perpendicular to the swing direction, and has a connecting hole 102a at its end. The second member 102 is connected to a common boss portion 104 to which the first member 101 is connected, and is supported so as to be swingable around the axis P3.

The third member 103 is formed in a triangular shape in a side view having a portion 103a along the first member 101, a portion 103b along the second member 102, a portion 103c extending between the connecting portion of the crankshaft 29 and the first member 101, and the connecting portion of the second selection portion 12 (linking shaft 35) and the second member 102. A connecting hole 103d is opened at the ends of the portions 103a and 103c of the third member 103, and a connecting hole 103e is opened at the ends of the portions 103b and 103c of the third member 103. As shown in FIG.

The portions 103a, 103b, and 103c of the third member 103 are plate-shaped with a width in the swinging direction larger than that in the direction perpendicular to the swinging direction, and the portions 103a, 103b, and 103c of the third member 103 are integrally formed. Portions 103a and 103b of the third member 103 are connected to a common boss portion 104 to which the first member 101 and the second member 102 are connected, and are supported so as to be swingable around the axis P3.

The first member 101 and the second member 102 are connected to the boss portion 104 with a gap therebetween in the direction along the axis P3. The third member 103 is arranged between the first member 101 and the second member 102 in front view and rear view, and portions 103 a and 103 b of the third member 103 are connected to the boss portion 104 .

The first connecting portion 111 is arranged between the end of the first member 101 and the end of the third member 103 (portions 103a and 103c) in front view and rear view. A bolt 128 is inserted and tightened through the connecting hole 101a of the first member 101, the connecting hole 03d of the third member 103, and the first connecting portion 111, so that the first connecting portion 111 is connected to the end of the first member 101 and the end of the third member 103 (portions 103a, 103c).
A connection shaft 34 a of the link 34 is connected to the boss portion 111 a of the first connection portion 111 , and the crankshaft 29 and the first connection portion 111 are connected via the link 34 .

The second connecting portion 112 is arranged between the end of the second member 102 and the end of the third member 103 (portions 103b and 103c) in front view and rear view. A bolt 128 is inserted and tightened through the connecting hole 102a of the second member 102, the connecting hole 103e of the third member 103, and the second connecting portion 112, so that the second connecting portion 112 is connected to the end of the second member 102 and the end of the third member 103 (portions 103b, 103c).

A connecting link 34 is connected across the crank portion 29 b of the crank shaft 29 and the boss portion 111 a of the first connecting portion 111 to connect the crank shaft 29 and the driving member 51 .
The linking shaft 35 is connected to the boss portion 112 a of the second connecting portion 112 , and the second screening portion 12 and the second connecting portion 112 are connected via the linking shaft 35 .

(Structure of Connection Portion Between Drive Arm and Linking Shaft)
As shown in FIG. 20, a pair of square rod-shaped connecting portions 52a are provided at the lower portion of the driving arm 52, and connecting holes 52b are opened in the connecting portions 52a. A connecting portion 52c and a connecting portion 52d are provided at the lower portion of the drive arm 52 .

The connection portion 52c of the drive arm 52 has a shape in which a rod-shaped portion is integrally formed with a semicircular portion, and a connecting hole 52e having an elongated cross section is opened in the rod-shaped portion. A connection portion 52d of the drive arm 52 is semicircular.

The connection portion 52c is inserted between the connection portions 52a of the drive arm 52, and the bolt 125 is inserted through the connection holes 52b and 52e of the drive arm 52 and tightened to connect the connection portion 52c to the connection portion 52a of the drive arm 52.

The connecting hole 52e of the driving arm 52 constitutes an arm length adjusting portion 127, and within the range of the connecting hole 52e of the driving arm 52, the length from the arm axis P4 of the driving arm 52 to the connecting portion with the second screening portion 12 (linking shaft 35) can be adjusted.

A cylindrical elastic body 123 made of rubber is attached to the connecting shaft 35 . An elastic body 123 is sandwiched between the connection portions 52c and 52d of the drive arm 52, and a bolt 126 is inserted across the connection portions 52c and 52d of the drive arm 52 and tightened, so that the drive arm 52 and the connecting shaft 35 are connected via the elastic body 123.

A plurality of protrusions 52f are provided on the inner surface of the connection portion 52d of the drive arm 52, and flange-like stoppers (not shown) facing the connection shaft 35 are provided at both ends of the connection portion 52d of the drive arm 52 in the direction along the connection shaft 35.

As described above, in a state in which the elastic body 123 is sandwiched between the connection portions 52c and 52d of the drive arm 52, the convex portion 52f of the connection portion 52d of the drive arm 52 bites into the outer surface of the elastic body 123, and the stopping portion of the connection portion 52d of the drive arm 52 contacts the end portion of the elastic body 123, thereby preventing the elastic body 123 from being dislocated.

(Structure of Connection Portion Between Connection Member and Coupling Shaft)
As shown in FIGS. 10 and 17 , a semicircular connecting portion 36 a is provided at the lower portion of the connecting member 36 , and a cylindrical elastic body 124 made of rubber is attached to the connecting shaft 35 . The connecting portion 36 a of the connecting member 36 sandwiches the elastic body 124 , the bolt 126 is inserted into the connecting portion 36 a of the connecting member 36 and tightened, and the connecting member 36 and the connecting shaft 35 are connected via the elastic body 124 .
The connecting portion 36a of the connecting member 36 is provided with a convex portion 36b and a stopper (not shown) similar to the convex portion 52f and the stopper of the connecting portion 52d of the drive arm 52. As shown in FIG.

Accordingly, an elastic body 123 is provided at the connecting portion between the drive arm 52 and the second screening section 12 , and elastic bodies 123 and 124 are provided at the connecting section between the drive member 51 and the second screening section 12 .

As shown in FIG. 15, instead of providing the elastic bodies 123 and 124, the elastic body 123 may be provided and the elastic body 124 may be eliminated. The elastic body 124 may be provided and the elastic body 123 may be eliminated. An elastic body 123 may be provided at the connecting portion between the driving member 51 (second connecting portion 112 ) and the linking shaft 37 .

(Structure of drive member and wear prevention member provided between drive arm and side wall)
As shown in FIG. 15, the driving member 51 (the first member 101) and the side wall 33 are close to each other in the right driving member 51 and the right side wall 33, and in the left driving member 51 and the left side wall 33.

A wear-resistant member 129 having excellent wear resistance is attached to a portion of the outer surface of the side wall 33 that faces the swinging range of the drive member 51 (first member 101).

In this case, the wear prevention member 129 may be attached to the drive member 51 (first member 101) without being attached to the side wall 33, or may be attached to both the side wall 33 and the drive member 51 (first member 101).

The drive arm 52 and the second screening section 12 (second sheave case 25) are close to each other at the right driving arm 52 and the rear right section of the second screening section 12 (second sheave case 25) and at the left driving arm 52 and the rear left section of the second screening section 12 (second sheave case 25).

A wear-resistant member 130 having excellent wear resistance is attached to a portion of the outer surface portion of the rear portion of the second screening portion 12 (second sheave case 25) that faces the swinging range of the drive arm 52, and the wear-resistant member 130 is arranged between the drive arm 52 and the second screening portion 12.

In this case, the wear prevention member 130 may be attached to the drive arm 52 instead of being attached to the second sorting section 12 (second sheave case 25), or may be attached to both the second sorting section 12 (second sheave case 25) and the drive arm 52.

The wear prevention member 130 may be attached to a portion of the rear outer surface portion of the first screening portion 11 (first sheave case 23) facing the swinging range of the drive arm 52, and the wear prevention member 130 may be arranged between the drive arm 52 and the first screening portion 11.

In this case, the wear prevention member 130 may be attached to the drive arm 52 without being attached to the first screening section 11 (first sheave case 23), or may be attached to both the first screening section 11 (first sheave case 23) and the drive arm 52.

Instead of providing the anti-wear members 129 and 130 as described above, the anti-wear member 129 may be provided and the anti-wear member 130 may be eliminated. Anti-wear member 130 may be provided and anti-wear member 129 may be eliminated.

(State in which the first sorting section and the second sorting section are reciprocally driven)
Based on the above-described (configuration of reciprocating drive of the first and second sorting units), the first sorting unit 11 and the second sorting unit 12 are driven to reciprocate in opposite directions along the longitudinal direction as described below.

As shown in FIGS. 15, 21, and 22, the power of the engine 8 is transmitted to the transmission shaft 17 via the transmission belt 18 (see the above-mentioned (structure of the threshing section)), transmitted to the transmission shaft 27 via the transmission belt 28, and transmitted to the crankshaft 29 via the transmission chain 30.

By rotationally driving the crankshaft 29, the drive member 51 is driven to reciprocate about the axis P3 via the link 34, and the drive member 51 reciprocates the second screening section 12 along the front-rear direction via the link shaft 35 and the connection member 36.

By reciprocating the second screening section 12 in the front-rear direction, the drive arm 52 is reciprocatingly driven about the arm axis P4 via the linking shaft 35, and the first screening section 11 is reciprocated along the front-rear direction.

As shown in FIG. 21, when the second sorting section 12 is driven forward, the drive arm 52 swings clockwise in FIG. 21, and the first sorting section 11 is driven rearward. As shown in FIG. 22, when the second sorting section 12 is driven rearward, the drive arm 52 swings counterclockwise in FIG. 22 to drive the first sorting section 11 forward. In this way, the first sorting section 11 and the second sorting section 12 are driven to reciprocate in opposite directions along the front-rear direction.

As shown in FIG. 4, the longitudinal length of the second screening section 12 (second sheave case 25) is shorter than the longitudinal length of the first screening section 11 (first sheave case 23). The plate thickness of the second sheave case 25 is set slightly thicker than the plate thickness of the first sheave case 23, and the weight of the first screening part 11 and the weight of the second screening part 12 are substantially the same.

In the above state, the driving member 51, which is the first driving mechanism, and the driving arm 52, which is the second driving mechanism, reciprocate the first sorting section 11 and the second sorting section 12 separately.
In this state, the second sorting section 12, which is one of the first sorting section 11 and the second sorting section 12, is reciprocally driven by the drive member 51, which is the first drive mechanism.
The reciprocating drive of the second sorting unit 12, which is one of the first sorting unit 11 and the second sorting unit 12, is transmitted to the first sorting unit 11, which is the other of the first sorting unit 11 and the second sorting unit 12, via the drive arm 52, which is the second drive mechanism, and the first sorting unit 11, which is the other of the first sorting unit 11 and the second sorting unit 12, is driven to reciprocate.

(Positional relationship of each part in the first sorting part and the second sorting part)
When the first sorting unit 11 and the second sorting unit 12 are driven to reciprocate in the front-rear direction as described above (the state in which the first sorting unit and the second sorting unit are reciprocatingly driven), the positional relationship of each unit is as described below.

The states shown in FIGS. 4, 5 and 6 are states in which the first screening section 11 is positioned at the rear end of the reciprocating movement and the second screening section 12 is positioned at the front end of the reciprocating drive.
With the second sorting unit 12 positioned at the front end of the reciprocating drive, the rear end 22a of the second grain pan 22 (the front end 26a of the grain sieve 26) is positioned behind the vertical line L1 passing through the top 54a of the front partition 54 in a side view.

The rear end portion 21b of the first grain pan 21 and the front end portion 31a of the first chaff sieve 31 are positioned above the front-rear central portion 22b of the second grain pan 22 while the second screening portion 12 is positioned at the front end portion of the reciprocating drive.

As a result, in a state in which the first screening unit 11 is positioned at the rear end of the reciprocating movement and the second screening unit 12 is positioned at the front end of the reciprocating drive, and in a state in which the first screening unit 11 is positioned at the front end of the reciprocating movement and the second screening unit 12 is positioned at the rear end of the reciprocating drive, the first grain pan 21 is arranged such that the rear portion of the first grain pan 21 and the front portion of the first chaff sieve 31 overlap the second grain pan 22 in plan view. and a first chaff sieve 31 and a second grain pan 22 are arranged.

The rear end portion 26b of the grain sheave 26 is positioned between a vertical line L2 passing through the top portion 55a of the rear partition portion 55 and a vertical line L3 passing through the screw shaft center P6 of the second article collecting portion 42 in a side view.

In this case, the rear end portion 26b of the grain sieve 26 is positioned slightly rearward with respect to the vertical line L2 in a side view while the second screening portion 12 is positioned at the front end portion of the reciprocating drive. With the second screening section 12 positioned at the rear end of the reciprocating drive, the rear end 26b of the grain sieve 26 is positioned slightly forward with respect to the vertical line L3 in a side view.

With the second sorting section 12 positioned at the front end of the reciprocating drive, the front end 32a of the second chaff sheave 32 is positioned at the position of the vertical line L4 passing through the rear end of the conveying screw 53 of the second article collecting section 42 in side view, and the second chaff sheave 32 is provided so as to extend rearward from the vertical line L4 passing through the rear end of the conveying screw 53 of the second article collecting section 42 in side view.

The straw rack 24 is extended rearward until the rear end portion 24 a of the straw rack 24 is positioned above the rear portion of the second chaff sheave 32 .
The rearward rising inclination angle B1 of the first chaff sieve 31 with respect to the horizontal plane is set to be larger than the rearward rising inclination angle B2 with respect to the horizontal plane of the first grain pan 21 .

The first grain pan 21 extends forward through between the receiving net 14 and the winnow case 65 until the front end portion 21a of the first grain pan 21 is positioned at the same position in the longitudinal direction as the front end portion 65f of the winnow case 65 (case portion 65a on the front side).

(First alternative embodiment of the invention)
In the driving member 51 shown in FIG. 19, the connecting holes 102a and 103e of the driving member 51 (the second member 102 and the third member 103) may be elongated in the radial direction about the axis P3.

According to this configuration, the connecting position of the second connecting portion 112 can be changed within the range of the connecting holes 102a and 103e of the driving member 51 (the second member 102 and the third member 103).
The connecting holes 102a and 103e of the driving member 51 (the second member 102 and the third member 103) constitute the member length adjusting portion 131, and the length from the axis P3 of the driving member 51 to the connecting portion with the second screening portion 12 (the connecting shaft 35) can be adjusted.

15 and 20 and the member length adjusting portion 131 shown in FIG. 19, the arm length adjusting portion 127 may be provided and the member length adjusting portion 131 may be eliminated. The member length adjuster 131 may be provided and the arm length adjuster 127 may be eliminated. Both the arm length adjuster 127 and the member length adjuster 131 may be provided.

(Second alternative embodiment of the invention)
The connection between the driving member 51 and the linking shaft 35 may be eliminated, and the driving member 51 may be connected to the linking shaft 37 .

According to this configuration, the driving member 51 is connected to the first screening section 11 via the connecting shaft 37, and the driving member 51 reciprocates the first screening section 11 along the front-rear direction. By reciprocating the first screening section 11 in the front-rear direction, the drive arm 52 is reciprocatingly driven about the arm axis P4, and the second screening section 12 is reciprocated along the front-rear direction.

When the first sorting section 11 is driven forward, the drive arm 52 swings counterclockwise in FIG. 20, and the second sorting section 12 is driven rearward. When the first sorting section 11 is driven rearward, the drive arm 52 swings clockwise in FIG. 20, and the second sorting section 12 is driven forward. In this manner, the first sorting section 11 and the second sorting section 12 are driven to reciprocate in opposite directions along the front-rear direction.

In the above state, the driving member 51, which is the first driving mechanism, and the driving arm 52, which is the second driving mechanism, reciprocate the first sorting section 11 and the second sorting section 12 separately.
In this state, the first sorting section 11, which is one of the first sorting section 11 and the second sorting section 12, is reciprocally driven by the drive member 51, which is the first drive mechanism.
The reciprocating drive of the first sorting unit 11, which is one of the first sorting unit 11 and the second sorting unit 12, is transmitted to the second sorting unit 12, which is the other of the first sorting unit 11 and the second sorting unit 12, via the drive arm 52, which is the second drive mechanism, and the second sorting unit 12, which is the other of the first sorting unit 11 and the second sorting unit 12, is driven to reciprocate.

(Third alternative embodiment of the invention)
The above (second alternative embodiment of the invention) may be configured as described below.

The linking shaft 37 may be configured to be connected to the first sorting section 11 via the elastic body 123 as shown in FIG. 15, and the drive arm 52 may be configured to be connected to the first sorting section 11 (the linking shaft 37) via the elastic body 123 as shown in FIG.

Accordingly, the connecting portion between the drive member 51 and the first sorting section 11 is provided with the elastic body 123 , and the connecting portion between the driving arm 52 and the first sorting section 11 is provided with the elastic body 123 . In this configuration, the elastic body 124 shown in FIG. 15 may be eliminated.

An arm length adjusting portion 127 may be provided to adjust the length from the arm axis P4 of the drive arm 52 to the connecting portion with the first sorting portion (linking shaft 37). A member length adjusting portion 131 may be provided for adjusting the length from the axis P3 of the driving member 51 to the connection portion with the first screening portion 11 (linking shaft 37).

In the arm length adjusting section 127 and the member length adjusting section 131, the arm length adjusting section 127 may be provided and the member length adjusting section 131 may be eliminated. The member length adjuster 131 may be provided and the arm length adjuster 127 may be eliminated. Both the arm length adjuster 127 and the member length adjuster 131 may be provided.

(Fourth alternative embodiment of the invention)
When the connection between the drive member 51 and the linking shaft 35 is abolished and the drive member 51 is connected to the linking shaft 37, the connection between the drive arm 52 and the first screening portion 11 may be abolished, and a linking link (not shown) different from the linking link 34 may be connected across the crank portion 29b of the crankshaft 29 and the drive arm 52.

According to this configuration, the power transmitted to the crankshaft 29 is branched into two systems in parallel, the power of one system is transmitted to the driving member 51, and the driving member 51 reciprocates the first screening unit 11. The power of the other system is transmitted to the drive arm 52 , and the drive arm 52 reciprocates the second screening section 12 .
The above state is a state in which the first sorting section 11 and the second sorting section 12 are separately reciprocated by the drive member 51 as the first drive mechanism and the drive arm 52 as the second drive mechanism.

(Fifth alternative embodiment of the invention)
The drive member 51 and the linking shaft 35 may be connected, the connection between the drive arm 52 and the linking shaft 35 (second selection portion 12) may be eliminated, and a linking link (not shown) different from the linking link 34 may be connected across the crank portion 29b of the crankshaft 29 and the driving arm 52.

According to this configuration, the power transmitted to the crankshaft 29 is branched into two systems in parallel, the power of one system is transmitted to the driving member 51, and the driving member 51 reciprocates the second screening section 12. The power of the other system is transmitted to the drive arm 52 , and the drive arm 52 reciprocates the first screening section 11 .
The above state is a state in which the first sorting section 11 and the second sorting section 12 are separately reciprocated by the drive member 51 as the first drive mechanism and the drive arm 52 as the second drive mechanism.

(Sixth alternative embodiment of the invention)
In the above-described (fourth alternative embodiment of the invention) and (fifth alternative embodiment of the invention), the first sorting section 11 and the second sorting section 12 may be configured to reciprocate in the same direction along the front-rear direction.

INDUSTRIAL APPLICABILITY The present invention can be applied not only to a threshing apparatus for a common combine, but also to a threshing apparatus mounted on a self-threshing combine.

5 threshing part 11 first sorting part 12 second sorting part 33 side wall 51 drive member (first drive mechanism)
52 drive arm (second drive mechanism)
123 elastic body 124 elastic body 127 arm length adjusting portion 129 wear prevention member 130 wear prevention member 131 member length adjusting portion P3 axial center P4 arm axial center

Claims (7)

a threshing section for threshing the harvested crops;
right and left sidewalls;
a first sorting unit arranged between the right and left side walls, arranged below the threshing unit, supported so as to be reciprocally movable in the front-rear direction, and sorting processed materials from the threshing unit;
A second sorting unit arranged between the right and left side walls, arranged below the first sorting unit, supported so as to be reciprocally movable along the front-rear direction, and sorting the processed objects from the first sorting unit;
a first driving mechanism provided on the outside of the side wall on the side opposite to the first sorting section and the second sorting section with respect to the side wall, and connected to one of the first sorting section and the second sorting section by bypassing the lower side of the lower end of the side wall ;
a second drive mechanism provided inside the side wall on the side of the first sorting section and the second sorting section with respect to the side wall and connected across the first sorting section and the second sorting section ;
One of the first sorting unit and the second sorting unit is reciprocatingly driven by the first drive mechanism,
Reciprocating drive of one of the first sorting unit and the second sorting unit is transmitted to the other of the first sorting unit and the second sorting unit via the second drive mechanism, and the other of the first sorting unit and the second sorting unit is reciprocatingly driven. The threshing device according to claim 1, wherein the first sorting section and the second sorting section are driven to reciprocate in opposite directions. The second drive mechanism is a drive arm supported so as to reciprocally swing about an arm axis extending in the left-right direction and extending in one direction and the other from the arm axis,
One portion of the drive arm with respect to the arm axis is connected to the first screening portion, and the other portion of the drive arm with respect to the arm axis is connected to the second selection portion,
One of the first sorting section and the second sorting section is driven to reciprocate by the first drive mechanism, whereby the drive arm is driven to reciprocate and swing, and the other of the first sorting section and the second sorting section is driven to reciprocate,
The threshing device according to claim 2, wherein the first sorting section and the second sorting section are driven to reciprocate in opposite directions. The first drive mechanism is a drive member that is reciprocatingly driven around an axis extending in the left-right direction,
4. The threshing apparatus according to claim 3, wherein at least one of a connecting portion between the drive member and one of the first sorting section and the second sorting section and a connecting section between the drive arm and one of the first sorting section and the second sorting section is provided with an elastic body. 5. The threshing apparatus according to claim 4 , further comprising at least one of a member length adjusting portion that adjusts a length of the driving member from the shaft center to a connecting portion with one of the first sorting portion and the second sorting portion, and an arm length adjusting portion that adjusts a length from the arm shaft center of the drive arm to a connecting portion with one of the first sorting portion and the second sorting portion. 6. The threshing device according to claim 4 or 5, wherein an antiwear member is disposed between at least one of the side wall and the drive member and between the drive arm and one of the first sorting section and the second sorting section. A threshing device according to any one of claims 1 to 6, wherein said first drive mechanism is connected to said second sorting section.

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