JP7321024B2 - 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 section and a sorting section arranged below the threshing section, and the harvested crops are threshed by the threshing section. and the processed material from the threshing section is sorted in the sorting section.

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 includes a threshing section for threshing the harvested crops, and a threshing section disposed below the threshing section and reciprocatingly driven in the front-rear direction to sort the material from the threshing section. a first sorting section for processing; and a second sorting section arranged below the first sorting section and reciprocatingly driven in the front-rear direction to sort the processed materials from the first sorting section. is provided, the reciprocating motion of the first sorting unit along the front-rear direction and the reciprocating motion of the second sorting unit along the front-rear direction are different from each other, and the second grain pan that conveys the processed material to the rear side is A wall portion provided at the front end portion of the second sorting portion and formed higher than the second grain pan so as to prevent spillage of the processed material from the second grain pan to the front side is provided at the front end portion of the second grain pan. , the upper part of the wall part is formed obliquely upward toward the rear, the front part of the first sorting part is arranged to be positioned in front of the front part of the second sorting part, and the second A winnow is arranged on the lower side of the front portion of the first sorting portion and the front side of the front portion of the second sorting portion, and supplies the sorting wind to the first sorting portion and the second sorting portion. The sorting wind of a part of the winnow flows rearward through the air passage between the first sorting unit and the wall, and the rearward obliquely upward wind direction member along the upper part of the wall is the Provided in an air path, in the air path, the sorting air passing above the air direction member flows along the bottom of the front part of the first sorting unit, and sorting air passing below the air direction member Wind is guided between the first sorting section and the second sorting section from between the wall portion and the wind direction member.

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. waste such as straw is 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 material from the threshing section is sorted in two stages by the first sorting section and the second sorting section, and one large sorting section having a large area in a plan view thresh. Compared to the configuration in which the processed materials from the threshing section are sorted, it is possible to sort more processed materials from the threshing section without difficulty, and the sorting performance of the threshing apparatus is improved.

According to the invention, a second grain pan is provided at the front end of the second sorting section, and a wall formed higher than the second grain pan is provided at the front end of the second grain pan.
As a result, even if the processed materials tend to spill forward from the second grain pan as the second sorting section is reciprocally driven, the spillage of the processed materials is prevented by the wall section. , it is possible to reduce the number of processed materials that are not sorted, thereby improving the sorting performance of the processed materials.

A threshing apparatus is often equipped with a winnow that supplies a sorting wind. It is configured to flow backwards.

According to the present invention, since the upper part of the wall part is formed obliquely upward and backward, the sorting wind of a part of the winnow is obstructed between the first sorting part and the wall part of the front end of the second grain pan. It will flow smoothly to the rear side without being overwhelmed.
When the upper part of the wall part is formed obliquely upward and rearward, the upper part of the wall part covers the front end part of the second grain pan from above, so that the processed material does not spill down in the second sorting part. It becomes effectively blocked by the wall.

In the present invention, the first article recovery section is provided below the second sorting section, the second article recovery section is provided below the second sorting section, and the first article recovery section is provided below the second sorting section. A first grain pan provided on the rear side with respect to the collecting unit, the winnow being provided on the front side with respect to the first product collecting unit, and conveying the processed material to the rear side, and a first grain pan for conveying the processed material to the rear side. The first chaff sieve for sorting and dropping the processed materials downward while conveying them to the rear side, and the straw rack for sorting and dropping the processed materials downward while conveying them to the rear side are arranged in this order from the front to the rear of the first sorting section. a second grain pan, a grain sieve for dropping the selected processed material to the first material recovery section, and a second chaff sieve for sorting the processed material while conveying it to the rear side and dropping it to the second material recovery section. are provided in this order from the front to the rear of the second sorting section.

According to the present invention, the first sorting section is provided with the first grain pan, the first chaff sieve and the straw rack, and the processed material from the threshing section is appropriately sorted in the first sorting section.
The second sorting section is provided with a second grain pan, a grain sieve and a second chaff sieve, and the processed material from the first sorting section is appropriately sorted in the second sorting section, and the sorted processed material is grains is collected by the first material collecting unit, and a mixture of grains, straw waste, etc. is collected by the second material collecting unit as the sorted processed material.

In the present invention, a mountain-shaped front partition protruding upward in a side view is provided between the first grain collecting portion and the winnow, and the grain sieve extends rearward from the rear end portion of the second grain pan. With the second sorting section positioned at the front end of the reciprocating drive, the rear end of the second grain pan extends from the vertical line passing through the top of the front partition in a side view. , is preferably located on the rear side.

According to the present invention, in the second sorting section, the grains as the sorted processed material fall from the grain sieve to the first recovery section, and the front partition section is provided between the first recovery section and the winnow. ing.

When the second sorting unit is reciprocally driven along the front-rear direction, according to the present invention, with the second sorting unit positioned at the front end of the reciprocating drive, the rear end of the second grain pan is, in a side view, It is located on the rear side with respect to the vertical line passing through the top of the front partition, and the rear end of the second grain pan moves forward beyond the vertical line passing through the top of the front partition in a side view. no.
As a result, the grains that have fallen from the vicinity of the front end of the grain sieve fall forward with respect to the top of the front partition and are not collected by the first grain collection section, which reduces the grain collection efficiency. improves.

In the present invention, the first chaff sieve is provided so as to extend rearward from the rear end portion of the first grain pan, and in plan view, the rear portion of the first grain pan and the front portion of the first chaff sieve; It is preferable that the first grain pan, the first chaff sieve, and the second grain pan are arranged so as to overlap with the second grain pan.

In the first sorting section, the processed material that has fallen from the threshing section to the first grain pan is transported rearward along the first grain pan and transported to the first chaff sieve, and the processed material sorted by the first chaff sieve is downward. fall to the side.

According to the present invention, in the first sorting section and the second sorting section, the rear portion of the first grain pan and the front portion of the first chaff sieve and the second grain pan are arranged so as to overlap in plan view.
As a result, the processed material falling from the rear end portion of the first grain pan (the front end portion of the first chaff sieve) does not fall forward with respect to the second grain pan, but smoothly falls into the second grain pan, The grains are transported from the grain pan to the grain sieve, improving the grain collection efficiency.

In the present invention, it is preferable that the rear end portion of the first grain pan is positioned above the front-rear central portion of the second grain pan.

According to the present invention, the processed material dropped from the rear end of the first grain pan (the front end of the first chaff sieve) falls near the center of the front and rear of the second grain pan and is conveyed from the second grain pan to the grain sieve. and the grain recovery efficiency is improved.

In the present invention, a conveying screw that conveys the processed material by being rotationally driven around the screw axis along the left-right direction is provided in the second material collecting section, and is a chevron-shaped rear partition projecting upward in a side view. A section is provided between the first article recovery section and the second article recovery section, and the rear end portion of the grain sheave is aligned, in side view, with a vertical line passing through the top of the rear partition section and the axis of the screw. It is preferable to be positioned between the vertical line passing through.

In the second sorting section, the grains fall from the grain sieves and are collected in the first grain collecting section. , and the treated material falls from the rear end of the grain sieve to the second material collecting section and is collected.

According to the present invention, the second article recovery section provided with the conveying screw rotationally driven around the screw axis along the left-right direction, and the rear end provided between the first article recovery section and the second article recovery section. In the partition portion, the rear end portion of the grain sheave is positioned between a vertical line passing through the top portion of the rear partition portion and a vertical line passing through the screw axis in a side view.

As a result, the treated material (a mixture of grains, straw waste, etc.) falling from the rear end of the grain sieve falls forward with respect to the top of the rear partition and is collected by the first material collecting section. Less condition and more efficient grain recovery.

In the present invention, it is preferable that the second chaff sieve is provided so as to extend rearward from a vertical line passing through the rear end portion of the conveying screw in a side view.

According to the present invention, in the second sorting section, the rear end of the grain sieve and the front end of the second chaff sieve are slightly separated in the front-rear direction. (mixtures such as shavings and straw scraps) can be easily dropped from the rear end of the grain sieve, thereby improving the collection efficiency of the second collection section.

In the present invention, it is preferable that the straw rack is extended rearward until the rear end portion of the straw rack is positioned above the rear portion of the second chaff sheave.

According to the present invention, in the first sorting section and the second sorting section, the straw rack and the second chaff sieve are arranged so as to overlap each other in plan view.
As a result, the processed material sorted by the straw rack falls from the straw rack, is received by the second chaff sieve, and is sorted by the second chaff sieve. It falls from the second chaff sieve and is collected by the second article collecting section, thereby improving the collection efficiency of the second article collecting section.

In the present invention, the first grain pan and the first chaff sieve are provided in a rearward-rising inclination state, and the rearward-rising inclination angle of the first chaff sieve is larger than the rearward-rising inclination angle of the first grain pan. is preferably set to

In the first sorting section, the first grain pan has a function of conveying the processed material to the rear side.
The first chaff sieve has a function of sorting the processed materials while conveying them rearward and dropping the sorted processed materials into the second sorting section.
In this case, if the first chaff sieve transports the processed material to the rear side too quickly, the sorting of the processed material in the first chaff sieve is delayed, and the processed material to be dropped into the second sorting section is There is a possibility that it will be transported to the straw rack from the

According to the present invention, since the rearward-rising inclination angle of the first chaff sieve is set to be larger than the rearward-rising inclination angle of the first grain pan, the first chaff sieve can convey the material to the rear side. a little late.
As a result, in the first chaff sieve, the sorting of the processed materials to be dropped to the second sorting section is delayed, and the situation in which the processed materials to be dropped to the second sorting section are conveyed from the first chaff sieve to the straw rack can be reduced. This improves the grain recovery efficiency.

In the present invention, the threshing section has a raking section for raking the harvested crops rearward and a threshing section provided continuously to the rear of the raking section for raking the crops. A winnow that is provided with a scouring cylinder that is driven to rotate about a rotation axis along a direction and a receiving net that is disposed below the scouring processing section, and the raking section covers the outer side of the squeegee. The front end of the receiving net and the front end of the winnow case are arranged at the same position in the front-rear direction. The first grain pan is extended forward through between the receiving net and the winnow case until the front end of the first grain pan is positioned at the same position as the front end of the winnow case in the longitudinal direction. It is preferable to have

In the threshing section provided with a threshing cylinder and a receiving net, a large amount of crops are threshed in the front part of the threshing section where the harvested crops are introduced, and a large amount of processed material is threshed from the front part of the threshing section. It falls into the first grain pan of the 1 sorting section.

According to the present invention, in a state in which the raking portion of the drum is provided so as to protrude forward from the front end portion of the winnow case covering the outside of the winnow, the space between the receiving net and the winnow case is used to: Since the first grain pan is elongated in the front-rear direction, even if a large amount of processed material falls from the threshing section into the first grain pan, the processed material can be conveyed to the rear side without difficulty by the first grain pan. become.

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, and D indicates the downward direction. Directions are indicated, R indicating the right direction and L indicating the left direction.

(Overall configuration of combine harvester)
As shown in FIG. 1, right and left front wheels 1 are supported on front portions of right and left body frames 3 arranged along the longitudinal direction, and right and left rear wheels 2 are supported on rear portions of the body frames 3. is supported. 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. It is 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 unit 11 and the second sorting unit 12 is provided below the front part of the threshing unit 5 and on the front side of the first product recovery unit 41. there is

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 sorted materials to be processed, is collected from the second sorting unit 12 to the second material recovery unit 42, and is supplied to the front part of the first sorting unit 11 by the conveying device 147. Sorted again.

When the grain tank 6 is filled with grains, the reaping 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 reaping work is resumed. do.

(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, and the like, 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 feeding valve 15 is provided above the handling cylinder 13. - 特許庁

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. ing.

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 shaving processing portion 13b of the scouring cylinder 13 includes a plurality of round pipe-shaped scouring support portions 13e arranged along the rotation axis P1, and a round bar material extending outward in the radial direction from the scouring portion 13e. A large number of shaped teeth 13f and the like are provided and formed.

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 via a transmission belt 18 from a pulley 17a connected to the left portion of the transmission shaft 17, and to the handling cylinder 13 via a bevel gear mechanism 19 inside the drive case 16. As a result, the handling cylinder 13 is rotationally driven around the rotation axis P1.

As a result, the crops cut by the reaper 10 are conveyed toward the threshing section 5 by the feeder 9, and are raked rearward by the raking section 13a of the threshing cylinder 13 and introduced into the threshing section 5. . 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 arranged between the right and left side walls 33, and the right and left side walls 33 are extended downward with respect to the threshing section 5. , is constructed as described below.

As shown in FIGS. 2, 3, 12, and 13, a square pipe-shaped strut member 92 is connected to the front and rear parts of the right body frame 3 and extends downward to form a front part of the left body frame 3. The square pipe-shaped strut members 92 are connected to the part and the rear part and extended downward, 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 connects 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 connects across the left fuselage frame 3, the left front and rear and the left lateral frame 94 are connected. 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 for sorting the processed material from the threshing unit 5 is arranged below the threshing unit 5 and arranged between the right and left side walls 33. It is supported so as to be able to reciprocate along the front-rear direction, and is configured to be reciprocally driven (see (Configuration of reciprocating drive of the first and second sorting units) described later).

The first sorting unit 11 is provided with a rectangular frame-shaped first sieve case 23 in a plan view. A first chaff sieve 31 for dropping the material to the lower side and a straw rack 24 for sorting and dropping the processed material while conveying it to the rear side are attached in this order to the first sieve case 23 to perform the first sorting. It is provided from the front part to the rear part of the part 11 .

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

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 along the left-right direction, and the sieve lines 44 are cantilevered from the rear end portion 21b of the first grain pan 21. It extends rearward in a shape. 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 sorting section 11 (first 1 sheave case 23).

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 the straw racks 24 are connected to the support frame 46 at intervals along the left-right direction and cantilevered from the support frame 46 . extending to the side.

(Configuration of first chaff sieve)
As shown in FIGS. 5, 8 and 9, in the first sorting section 11, a large number of chaffs 99 extending in the left-right direction are arranged in the first sheave case 23 so as to be aligned in the front-rear direction. A chaff sieve 31 is constructed.

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

Flat plate-shaped elongated right and left operation 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 It is connected to the operating member 105 so as to be able to swing about an axis extending in 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. ing. 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 front-rear direction. The position of the right operation member 105 is changed in the front-rear direction through the front-rear direction.

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 connection 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 capable of swinging in the vertical direction. It is postponed. 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 a spring receiving portion 108a provided on the rod portion 108 and a boss portion 107 are engaged with each other in a state where the coil spring 109 is compressed with respect to its free length. placed in between.

The coil spring 109 tries to extend from a compressed state with respect to its free length, thereby operating the interval changing portion 106 counterclockwise in FIG. , the interval changing portion 106 is biased toward the opening side.

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 space changing portion 106. It is connected to the connection portion 106b.

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 coil spring 109 is resisted and the interval changing portion is moved. 106 is pivoted clockwise in FIG. 8 around the pivot axis P8, and the interval changing portion 106 is operated to the closing side. 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 118 a of the wire 118 is returned toward the interval changing portion 106 , the coil spring 109 expands and moves toward the interval changing portion via the boss portion 107 . By pushing 106, the space changing portion 106 is swung around the swing axis P8 in the counterclockwise direction in FIG. 8, and the space changing portion 106 is opened.

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 for sorting the processed materials from the first sorting unit 11 is arranged below the first sorting unit 11, and has right and left sidewalls. 33, and 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 First Sorting Section and Second Sorting Section) described later). )).

The second sorting unit 12 is provided with a second sieve case 25 having a rectangular frame shape in a plan view. and a second chaff sieve 32 for sorting out the processed material while conveying it to the rear side and dropping it into the second material recovery section 42 are attached in this order to the second sieve case 25 for the second sorting. It is provided from the front part to the rear part of the part 12 .

The second grain pan 22 is formed in a sawtooth shape when viewed from the side. 25). 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 passes through the first sorting section 11 (the rear part of the first grain pan 21) and the wall. The wall portion 48 prevents the treated material from spilling forward from the second grain pan 22 .

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. It is

A large number of elongated 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 leaving intervals along the left-right direction. It extends rearward in a cantilevered manner from the end 26b.

The front end portion 32a of the second chaff sheave 32 is arranged at a position slightly rearwardly separated from the rear end portion 26b of the grense sheave 26, and the second chaff sheave 32 extends rearward in an upwardly inclined state. It is provided in the second sorting section 12 (second sheave case 25).

As with the first chaff sieve 31 described in (Configuration of the first chaff sieve), the second chaff sieve 32 also has a large number of chaff lip 110 extending in the left-right direction. A second chaff sieve 32 is arranged in the case 25 .

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.

(Configuration 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 along the left-right direction, and a front portion 132a of the rear end portion 132 rises rearward in side view. It is formed in an inclined state, and the rear portion 132b of the rear end portion 132 is formed in a rear 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, and 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. , and an elongated hole 133c extending in the front-rear direction is opened in the lower portion 133a.

The 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 slidable along the rearward upward inclination direction when viewed from the side. , is supported by the rear end portion 132 such that its position can be changed in the vertical direction.

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.

A bolt 134, which is a position fixing portion, is inserted through the connecting hole of the front portion 132a of the rear end portion 132 and the elongated hole 133c of the rear wall portion 133 and tightened, whereby the rear wall portion 133 (lower portion 133a) is fixed. is fixed to the rear end 132 . By loosening the bolt 134, the fixation 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 formed on the inner surface portions of the right and left portions of the rear portion of the second sheave case 25 in the longitudinal direction. connected at intervals along the 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 part of the upper part 133b of the rear wall part 133 is arranged between the indicator parts 135, 136 on the rear right part of the second sheave case 25, and the left part of the upper part 133b of the rear wall part 133 is arranged in the second sheave case. 25 is located between the indicators 135 and 136 on the left side of the rear.

When the position of the rear wall portion 133 is changed to the front side and the rear side 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. The position where the upper portion 133 b of the 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. , the upper portion 133 b 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 bolt 138 is tightened across the upper portion 133b of the rear wall portion 133 and the nut 137 of the indicator portion 136, so that the upper portion 133b of the rear wall portion 133 is attached to the indicator portion 136. concatenated.

When the upper portion 133b of the rear wall portion 133 is positioned between the index portions 135 and 136 and the position of the rear wall portion 133 is fixed by the bolts 134, the upper portion 133b of the rear wall portion 133 is positioned between the index portions 135 and 136. Since they are not connected, 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 that, 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 as shown by the dotted line in FIG. It can rest on the rear portion 132b of the end portion 132. FIG. This state is close to a state in which the rear wall portion 133 does not exist.

In this state, the bolt 134 is inserted through the connecting hole of the front portion 132a of the rear end portion 132 and the elongated hole 133c of the rear wall portion 133 and tightened so that the rear wall portion 133 is attached to the rear end portion 132. fixed to 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-like guide member 141 made of a flexible rubber plate moves from the position of the rear end portion 26b of the grain sieve 26 to the second sorting section. It extends in a downwardly inclined state toward the first article collecting section 41 arranged below the section 12 . 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 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 to It extends in a downwardly inclined state toward the second article collecting section 42 which is a collecting section arranged below the sorting section 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 outer 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 25. As shown in FIG.

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 which is connected to 25. As shown in FIG.

The right and left portions 139 a of the guide member 139 form right and left leak prevention portions 140 , and the leak prevention portions 140 are positioned against the guide member 139 between the second sheave case 25 and the side wall 33 . placed in the upper position.

As a result, in the vicinity of the rear portion of the second sheave case 25, the gap between the second sheave case 25 and the side wall 33 is blocked by the leakage preventing portion 140, so that the second sheave case 25 and the side wall 33 are separated from each other. Leakage of the material to be processed to the rear side from the gap between is reduced.

(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. be. 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 sheave 26 is opened. 139 and 141 (see the above-mentioned (Construction of the guide member)) can be appropriately arranged in the first article collection section 41 and the second article collection section 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, inspection and cleaning of the upper portion of the grain sieve 26 can be performed.

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, the operator can A flexible guide member (not shown) at the front end can be arranged appropriately in the first sorting section 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 able to swing open and close about an axis P9 extending in the left-right direction. A connecting bolt 146 is provided at the rear end of the bottom plate portion 145 to fix the bottom plate portion 145 in a closed state.

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

An inspection cover 148 of a rocking open/close type that covers the inspection opening 66a of the transport device 66, a detachable open/close type inspection cover 149 that covers the inspection opening 66b of the transport device 66, and covers the inspection opening 66c of the transport device 66. A detachable openable type inspection cover 151 and a detachable openable type inspection cover 152 for covering the inspection opening 66d of the transfer device 66 are provided.

In the conveying device 147 that supplies the mixture of grains, straw waste, etc. collected by the second material collecting unit 42 to the front part of the first sorting unit 11, inspection openings are provided in the lower part, the upper part, and the middle part of the conveying device 147. Portions 147a, 147b, 147c and 147d are provided.

An inspection cover 153 of a rocking open/close type 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, and covers the inspection opening 147c of the transport device 147. A rocking open/close type inspection cover 155 and a rocking open/close type inspection cover 156 for covering the inspection opening 147d of the transfer 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 located forward of the front portion of the second sorting portion 12. ing. 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. are placed.

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 plate-like openings 33a extend over the front and rear portions of the openings 33a of the side walls 33. Right and left support frames 61 are connected.

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 in side view support the drive shaft 62. As shown in FIGS. connected to 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, and the outside of the winnow 47 is covered with the winnow case 65. A front case portion 65a and a rear case portion 65b are provided.

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 . there is 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 driven to rotate, 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 directed backward and obliquely upward from the vicinity of the lower part of the winnow 47. As described later in (Configuration of first air duct and first, second, and fifth air direction members) (Configuration of second air duct and third, fourth, and sixth air direction members), the right and left sidewalls It is supplied to the first sorting section 11 and the second sorting section 12 from between 33 .

(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 protruding upward in a 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 positioned below the second sorting portion 12 and at the bottom of the front partition portion 54. It is provided on the rear side with respect to the top portion 54a which is the rear end portion of 54b.

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

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 55b of the rear partition portion 55 is connected to the lower portion of the first article collection portion 41, and the vertical wall portion 55c 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 across the right and left side walls 33, and is formed in an inclined state in which the front portion of the first airflow direction member 71 is lower than the rear portion, and the first airflow direction member 71 is inclined upward to the rear. The rear end portion 71a of is extended 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. is formed.

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. be.
The sorting wind from the winnow 47 is branched by the first airflow direction member 71, guided to the second airflow path A2, and is guided to the second airflow path A2, as described later in (Configuration of the second airflow path and the third, fourth, and sixth airflow direction members). Then, the air is guided to the second sorting section 12 from the lower side with respect to the second sorting section 12 by the second air passage A2.

A flat plate-shaped second wind direction member 72 is arranged below 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 the wall portion 48 of the second sorting portion 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. As shown in FIG.
The sorting wind of the first air path A1 passing below the second air direction member 72 is directed from between the wall portion 48 provided at the front end portion of the second sorting section 12 and the second air direction member 72 to the first air direction member 72. It is guided between the sorting section 11 and the second sorting section 12 .

(Configuration of the second air passage and the third, fourth, and sixth air 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 behind the winnow 47 and below the first air direction member 71. It is provided across the right and left side walls 33 .

The third airflow direction member 73 is formed in an upwardly 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. A rear end portion 73a 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 airflow direction member 76 has a flat plate shape with a large number of openings, and is inclined so that the rear portion of the sixth airflow direction member 76 is closer to the left and right central portion between the right and left side walls 33 than the front portion. It is arranged and connected to the first airflow direction member 71 and the third airflow direction member 73 .

The sorting wind from the winnow 47 is branched by the first wind direction member 71 and guided to the second air passage A2, and the sorting wind of the second air passage A2 flows between the first wind direction member 71 and the third wind direction member 73. It 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 screening section 12 from below the second screening section 12 .

When the sorting wind of the second air channel A2 passes between the first air direction member 71 and the third air direction member 73, the sorting wind of the second air channel A2 (the winnow 47) flowing along the right side wall 33 is By the right sixth airflow direction member 76, it is guided toward the left-right central portion between the right and left side walls 33, and the second airflow path A2 (Karamino) passes through the opening of the right sixth airflow direction member 76. 47) is in a state of flowing along the right side wall 33 .

When the sorting wind of the second air channel A2 passes between the first air direction member 71 and the third air direction member 73, the sorting wind of the second air channel A2 (the winnow 47) flowing along the left side wall 33 is By the left sixth airflow direction member 76, it is guided toward the left-right central portion between the right and left side walls 33, and the second airflow path A2 (Karamino) passes through the opening of the left sixth airflow direction member 76. 47) is in a state of flowing along the left side wall 33 .

A part of the sorting air of the second air passage A2 is branched by the third air direction member 73, and the sorting air branched from the second air passage A2 is made to follow the bottom portion 54b of the front partition portion 54 by the third air direction member 73. , and is guided along the bottom portion 54 b 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) flows between the third wind direction member 73 and the bottom portion 54b of the front partition portion 54 and between the fourth wind direction member 73 and the bottom portion 54b. It passes through between the wind direction member 74 and the bottom portion 54 b of the front partition portion 54 and is guided to the upper portion of the first article collecting portion 41 .

The sorting wind along the bottom 54b of the front partition 54 (the sorting wind branched from the second air passage A2) flows from between the third wind direction member 73 and the bottom 54b of the front partition 54 to the fourth wind direction member 74. When passing through the space between the bottom portion 54b of the front partition portion 54, the air flows from between the third air direction member 73 and the fourth air direction member 74 along the bottom portion 54b of the front partition portion 54 (second air path). 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 has a pulley 17b connected to the left portion of the transmission shaft 17 and a pulley 17b connected to the transmission shaft 27. A transmission belt 28 is attached across the pulley 27a.

A relay shaft 56 is rotatably supported by the left side wall 33, and a transmission belt 57 is attached across a pulley 56a connected to the relay shaft 56 and a pulley 27c 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 through the transmission shaft 27 and the transmission belts 28 and 57, and through the transmission belt 58, It is transmitted to the conveying screws 50 and 53, and the conveying screws 50 and 53 are rotationally driven. 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 processed materials fall from the second sorting unit 12 to the first grain recovery unit 41, the grains are recovered by the conveying screw 50 that is rotationally driven, and the right side wall 33, and supplied to the grain tank 6 from the outlet of the right side wall 33 by the conveying device 66 (see FIG. 3).

When the sorted mixture of grains, straw waste, etc. as the sorted material falls from the second sorting section 12 to the second material recovery section 42, the mixture is recovered by the conveying screw 53 that is rotationally driven, and the right side wall is collected. 33, and supplied to the front part of the first sorting section 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 pulley (not shown) connected to the relay shaft 56, A transmission belt 68 is attached across 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 is provided to support the tension pulleys 70 and 77, 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 includes a flat 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, and swingable around the fulcrum shaft 78b. A supported arm 78d or the like is provided.

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 tension of the transmission belt 68 is maintained accordingly. Then, the arm 78d of the support portion 78 and the tension pulley 77 swing.

(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 provided on the rear side of the winnow 47 at the same height as the drive shaft 62 and the support frame 61. position and connected to the outer surface of the left side wall 33 .

As described in (Configuration of the first air duct and the first, second, and fifth air direction members) (Configuration of the second air duct and the third, fourth, and sixth air direction members), the right end portion of the first air direction member 71 and left end portions, and the right and left end portions of the third wind 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 divided into the inner surface portion facing the reinforcing member 81 of the left side wall 33 to which the reinforcing member 81 is connected, and the inner surface facing the reinforcing member 81 of the right side wall 33 . It is provided throughout the department.

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 rotating speed changing unit 83 is supported by a reinforcing member 81, and the interval changing mechanism 82 is operated by the rotating speed changing unit 83 to change the rotation speed of the winnow 47, thereby changing the air volume of the sorting wind of the winnow 47. .

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 rotationally driven by the power of the electric motor 85, the operation gear 84 is oscillated by the pinion gear 86a of the gear mechanism 86, and the operation rod 87 is pushed and pulled to change the interval. Mechanism 82 is operated. 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. ing. 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 covers the rotational speed changing portion 83 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 drive unit, is rotatably supported across right and left side walls 33 around an axis P2 extending in the left-right direction. A transmission chain 30 is attached across the sprocket 27 b connected to the crankshaft 29 and the sprocket 29 a 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. It is 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 connecting shaft 35, the right and left connecting members 36 are connected to the rear part of the second screening section 12 (second sheave case 25), and the driving member 51 is connected to the second It is connected to the sorting 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 so as to be reciprocally rockable about the arm axis P4 along the left-right direction. are placed inside. 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, and the linking shaft 37 is attached to the rear portion of the first screening section 11 (first sheave case 23). , and one portion of the drive arm 52 with respect to the arm axis P4 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 via the linking shaft 35 and the connection member 36. , to the second sorting section 12 (second sheave case 25).

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 .

The tension wheel 119 is supported by a channel-shaped wheel support portion 121 so as to be rotatable around an axis extending in the left-right direction. placed movably. A guide rod 121a connected to the wheel support portion 121 is inserted into the boss portion 120b of the support member 120 so as to be vertically slidable. is installed.

The guide rod 121a 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 where the spring 122 is compressed with respect to its free length. It is

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 portion 121 are pushed up by the biasing force of the spring 122, and the tension wheel 119 is pushed up against the transmission chain 30. Being pressed against the lower part, the tension of the transmission chain 30 is maintained. 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 driving members 51 are composed of a first member 101, a second member 102, a third member 103, a boss portion 104, a first connecting portion 111 and a second connecting portion 112. etc. The right and left drive 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 swingable 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 includes a portion 103a along the first member 101, a portion 103b along the second member 102, a connection portion between the crankshaft 29 and the first member 101, the second screening portion 12 (linking shaft 35), and the second member. It is formed in a triangular shape when viewed from the side, having a portion 103c and the like extending from the connection portion of 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 having a larger width in the swinging direction than the width in the direction orthogonal to the swinging direction. Parts 103a, 103b, 103c 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. It is arranged on the left-right center side (the side close to the side wall 33) of the first and second sorting sections 11 and 12. As shown in FIG. 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 across the connecting hole 101 a of the first member 101 and the connecting hole 03 d 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 through the connecting hole 102 a of the second member 102 , the connecting hole 103 e of the third member 103 , and the second connecting portion 112 and tightened 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 sorting portion 12 and the second connecting portion 112 are connected via the linking shaft 35 .

(Structure of Connection Portion Between Drive Arm and Coupling 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 52 c and a connecting portion 52 d 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 connecting portion 52c is inserted between the connecting portions 52a of the driving arm 52, and the bolt 125 is inserted through the connecting holes 52b and 52e of the driving arm 52 and tightened so that the connecting portion 52c is connected to the connecting portion 52a of the driving arm 52. Concatenated.

The connecting hole 52e of the driving arm 52 constitutes an arm length adjusting portion 127. In the range of the connecting hole 52e of the driving arm 52, the arm axis P4 of the driving arm 52 is adjusted to the second selection portion 12 (the connecting shaft 35 ) can be adjusted.

A cylindrical elastic body 123 made of rubber is attached to the connecting shaft 35 . The elastic body 123 is sandwiched between the connection portions 52c and 52d of the drive arm 52, and the 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 to the elastic body 123. connected through

A plurality of projections 52f are provided on the inner surface of the connection portion 52d of the drive arm 52, and flange-like projections 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. A stop (not shown) is provided.

As described above, in a state in which the elastic body 123 is sandwiched between the connecting portions 52c and 52d of the driving arm 52, the convex portion 52f of the connecting portion 52d of the driving arm 52 bites into the outer surface portion of the elastic body 123, The stop portion of the connecting portion 52d abuts the end 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 elastic body 124 is sandwiched by the connection portion 36a of the connection member 36, the bolt 126 is inserted into the connection portion 36a of the connection member 36 and tightened, and the connection member 36 and the linking shaft 35 are connected via the elastic body 124. there is
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 driving arm 52 and the second screening portion 12, and elastic bodies 123 and 124 are provided at the connecting portion between the driving member 51 and the second screening portion 12. ing.

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 drive member 51 (the first member 101) and the side wall 33 are close to each other in the right drive member 51 and the right side wall 33, and in the left drive 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 driving member 51 (first member 101). A wear-resistant member 129 is arranged between the side wall 33 covering the outside of the portion 12 and the drive member 51 .

In this case, the antiwear 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). may

At the right driving arm 52 and the rear right portion of the second screening section 12 (second sheave case 25), and at the left driving arm 52 and the rear left portion of the second screening section 12 (second sheave case 25). , the drive arm 52 and the second sorting section 12 (second sheave case 25) are approaching each other.

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 second sorting section 12, a wear prevention member 130 is arranged.

In this case, the wear prevention member 130 may be attached to the drive arm 52 without being attached to the second screening section 12 (second sheave case 25), and the second screening section 12 (second sheave case 25) and It may be attached to both drive arms 52 .

A wear prevention member 130 is attached to a portion of the rear outer surface portion of the first screening portion 11 (first sheave case 23 ) that faces the swinging range of the drive arm 52 so that the drive arm 52 and the first screening portion 11 are separated from each other. A wear-resistant member 130 may be arranged between.

In this case, the wear prevention member 130 may be attached to the drive arm 52 without being attached to the first screening portion 11 (first sheave case 23), and the first screening portion 11 (first sheave case 23) and It may be attached to both drive arms 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 driven to reciprocate)
Based on the above-described (configuration of reciprocating drive of the first sorting section and the second sorting section), the first sorting section 11 and the second sorting section 12 are arranged in opposite directions along the front-rear direction as described below. driven to and fro.

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)), and is transmitted via the transmission belt 28. It is transmitted to the shaft 27 and transmitted to the crankshaft 29 via the transmission chain 30 .

When the crankshaft 29 is rotationally driven, the driving member 51 is reciprocatingly driven about the axis P3 via the linking link 34. , the second sorting unit 12 is driven to reciprocate along the front-rear direction.

As the second screening section 12 is driven to reciprocate 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 moves in the front-rear direction. Reciprocating drive.

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 to be slightly thicker than the plate thickness of the first sheave case 23, so that the weight of the first screening section 11 and the weight of the second screening section 12 are substantially the same. is configured as

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. .
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, moves the first sorting unit 11 and the second sorting unit 12 through the drive arm 52, which is the second drive mechanism. This is a state in which the first sorting section 11, which is the other of the first sorting section 11 and the second sorting section 12, is reciprocally driven.

(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 (state in which the first sorting unit and the second sorting unit are reciprocatingly driven), the positional relationship of each unit is is explained 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 screening section 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 vertically through the top 54a of the front partition 54 in side view. It is located on the rear side with respect to the line L1.

The rear end 21b of the first grain pan 21 and the front end 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 sorting section 12 is positioned at the front end of the reciprocating drive. are doing.

As a result, 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, and the first screening section 11 is positioned at the front end of the reciprocating movement. In a state where the second screening unit 12 is positioned at the rear end of the reciprocating drive, 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. , a first grain pan 21 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. there is

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 aligned with the vertical line L4 passing through the rear end of the conveying screw 53 of the second article collecting section 42 in a side view. , and the second chaff sheave 32 is provided so as to extend rearward from a vertical line L4 passing through the rear end of the conveying screw 53 of the second article collecting section 42 in a 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 of the first grain pan 21 with respect to the horizontal plane.

The first grain pan 21 is positioned 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 (the case portion 65a on the front side). It extends forward through the gap.

(First alternative embodiment of the invention)
A plurality of winnows 47 may be provided, and the sorting wind of one winnow 47 may be supplied to the first air passage A1, and the sorting wind of another winnow 47 may be supplied to the second air passage A2. .

(Second alternative embodiment of the invention)
The first sorting unit 11 and the second sorting unit 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 13 Handling cylinder 13a Raking part of threshing cylinder 13b Handling part of threshing cylinder 14 Receiving net 14a Front end of receiving net 21 First grain pan 21a Front end of first grain pan 21b rear end portion of first grain pan 22 second grain pan 22a rear end portion of second grain pan 22b front-rear central portion of second grain pan 24 straw rack 24a rear end portion of straw rack 26 grain sieve 26b rear end portion of grain sieve 31 first chaff sieve 32 2nd chaff sieve 41 No. 1 product recovery unit 42 No. 2 product recovery unit 47 Winnow 48 Wall 48a Top of wall 53 Conveying screw 54 Front partition 54a Top of front partition 55 Rear partition 55a Top of rear partition 65 Winnow case 65f Front end of winnow case
72 Second wind direction member (wind direction member)
A1 First air passage (air passage)
B1 Angle of inclination B2 Angle of inclination L1 Vertical line L2 Vertical line L3 Vertical line L4 Vertical line P1 Rotation axis P6 Screw axis

Claims (10)

a threshing section for threshing the harvested crops;
a first sorting unit arranged below the threshing unit and reciprocatingly driven in the front-rear direction for sorting processed materials from the threshing unit;
a second sorting unit arranged below the first sorting unit and reciprocatingly driven along the front-rear direction for sorting the processed material from the first sorting unit;
The reciprocating motion of the first sorting unit along the front-rear direction and the reciprocating motion of the second sorting unit along the front-rear direction are different from each other,
A second grain pan for conveying the processed material to the rear side is provided at the front end of the second sorting unit,
A wall formed higher than the second grain pan so as to prevent spillage of the processed material forward from the second grain pan is provided at the front end of the second grain pan , and the upper portion of the wall faces rearward. is formed obliquely upward from
The front part of the first sorting unit is arranged so as to be located on the front side of the front part of the second sorting unit,
A winnow, which is arranged on the lower side of the front portion of the first sorting portion and the front side of the front portion of the second sorting portion, and supplies the sorting air to the first sorting portion and the second sorting portion. is provided,
The sorting wind of a part of the winnow flows rearward through the air passage between the first sorting unit and the wall,
A rearward obliquely upward wind direction member is provided in the air passage along the upper part of the wall,
In the air path, the sorting wind passing above the wind direction member flows along the bottom of the front portion of the first sorting section, and the sorting wind passing below the wind direction member flows along the wall portion. and the wind direction member and guided between the first sorting section and the second sorting section . A first item recovery unit is provided below the second sorting unit,
a second item recovery unit provided below the second sorting unit and behind the first item recovery unit;
The winnow is provided on the front side with respect to the first item collecting section,
A first grain pan that conveys the processed material to the rear side, a first chaff sieve that sorts the processed material while transporting it to the rear side and drops it downward, and a processed material that sorts it while transporting it to the rear side and drops it to the lower side. A straw rack is provided in this order from the front to the rear of the first sorting section,
The second grain pan, the grain sieve for dropping the sorted processed material to the first material collecting section, and the second chaff sieve for sorting the processed material while conveying it to the rear side and dropping it to the second material collecting section are arranged in this manner. The threshing device according to claim 1 , which is provided in order from the front part to the rear part of the second sorting part. A mountain-shaped front partition protruding upward in a side view is provided between the first item collecting unit and the winnow,
The grain sieve is provided to extend rearward from the rear end of the second grain pan,
With the second sorting section positioned at the front end of the reciprocating drive, the rear end of the second grain pan is positioned rearward with respect to a vertical line passing through the top of the front partition in a side view. The threshing device according to claim 2 . The first chaff sieve is provided to extend rearward from the rear end of the first grain pan,
The first grain pan, the first chaff sieve, and the second grain pan are arranged such that the rear portion of the first grain pan, the front portion of the first chaff sieve, and the second grain pan overlap in plan view. The threshing device according to claim 2 or 3 . 5. The threshing apparatus according to claim 4, wherein the rear end portion of the first grain pan is located above the front-rear central portion of the second grain pan. A conveying screw that conveys the processed material by being rotationally driven around the screw axis along the left-right direction is provided in the second material collecting section,
A mountain-shaped rear partition protruding upward in a side view is provided between the first article collection section and the second article collection section,
6. Any one of claims 2 to 5, wherein the rear end of the grain sheave is positioned between a vertical line passing through the top of the rear partition and a vertical line passing through the screw shaft core when viewed from the side. A threshing device according to any one of the preceding paragraphs. The threshing device according to claim 6 , wherein the second chaff sieve is provided so as to extend rearward from a vertical line passing through the rear end of the conveying screw in a side view. The threshing apparatus according to any one of claims 2 to 7 , wherein the straw rack extends rearward until the rear end of the straw rack is positioned above the rear portion of the second chaff sheave. . The first grain pan and the first chaff sieve are provided in a rearwardly rising inclined state,
The threshing apparatus according to any one of claims 2 to 8 , wherein the rearward rising inclination angle of the first chaff sieve is set to be greater than the rearward rising inclination angle of the first grain pan. The threshing part has a raking part for raking the harvested crops backward and a shaving part provided continuously at the rear part of the raking part for shaving the crops, and the threshing part is arranged along the front-rear direction. A scouring cylinder that is rotationally driven around a rotation axis and a receiving net disposed below the scouring unit are provided,
The raking portion is provided at the front of the drum so as to protrude further forward than the front end of a winnow case covering the outside of the winnow,
The front end portion of the receiving net and the front end portion of the winnow case are arranged at the same position in the front-rear direction,
The first grain pan is extended forward through between the receiving net and the winnow case until the front end of the first grain pan is positioned at the same position as the front end of the winnow case in the longitudinal direction. The threshing device according to any one of claims 2 to 9 .

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