JP2001037324A - Grain transportation apparatus for thresher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grain transportation apparatus for a thresher capable of preventing grain from stagnating in a grain elevating spiral metal and the grain elevating spiral metal from clogging with the grain. SOLUTION: A grain elevating spiral metal 3 at the lower part and a grain elevating and transportation cylinder 4 at the lower part have a built-in outer diameter part of a grain elevating spiral 5 for elevating and transporting grain. A tapered shape A having a small outer diameter at the upper part and a large outer diameter at the lower part is formed in the grain elevating spiral metal 3. A straight shape B having a small outer diameter is formed in the grain elevating and transporting cylinder 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frying spiral metal and a frying transfer cylinder which are internally provided with a frying spiral for pumping grains, and the frying spiral is formed at the upper end of the frying spiral metal. The outer diameter of this lower end is from the part located in the part to the lower end,
From the large outer diameter which is substantially the same as the inner diameter of the fry transfer cylinder, the outer diameter located at the upper end of the fried spiral metal is formed in a tapered shape as a small outer diameter. The outer diameter from the top to the upper end of the filing spiral is a straight shape with substantially the same small outer diameter, and the inner surface of the filing spiral metal is substantially the same taper as the taper shape. This technology is formed into a shape and can be used as a grain transfer device for a threshing machine.

[0002]

2. Description of the Related Art For example, grain culms supplied to a threshing machine are threshed and sorted in the threshing machine, and sorted kernels are transferred by a first transfer spiral provided at a lower portion in the threshing machine. The feed spiral is supplied into the helix spiral metal provided at the transfer end portion of the number transfer helix, and into the straight helix spiral provided inside the helix spiral metal and the fry transport cylinder provided on the upper side. The sorted kernels are taken over, lifted upward by the spiraling spiral, supplied to a kernel storage tank, and temporarily stored.

[0003]

The grains supplied into the helix spiral metal are taken over by the helix spiral provided in the helix spiral metal and the fry transfer cylinder provided on the upper side, and are lifted upward. However, since the shape of the outer diameter portion of the helix spiral is a straight shape, it is difficult to lift the grains in the helix spiral metal. In some cases, the stagnation of the grains occurs, causing clogging of the grains. However, the present invention is intended to solve this problem.

[0004]

For this purpose, the present invention comprises a lower frying spiral metal 3 and an upper frying transfer cylinder 4, an inner part of the frying spiral metal 3 and the frying transfer cylinder 4. In a threshing machine provided with a filing spiral 5 for pumping out grains, a lower end portion (a) of the filing spiral 5 in the filing spiral metal 3 and a large outer diameter (L1) of an outer diameter and the lifting screw 5 The inner diameter (L) of the grain transfer cylinder 4 is substantially equal to the inner diameter (L), and the outer diameter of the hoisting spiral 5 located at the upper end portion (b) of the hoisting spiral metal 3 is defined as a small outer diameter (L2). A tapered shape (A) is provided between the outer diameter (L1) and the small outer diameter (L2).
And from the small outer diameter (L2) portion to the upper end (C) of the filing spiral 5 is formed into a straight shape (B) having a substantially same outer diameter (L2). The inner surface of the helix spiral metal 3 and the taper (A) portion of the helix spiral 5 are formed in substantially the same taper shape (A). The structure of the grain transfer device is adopted.

[0005]

The culm supplied to the threshing machine is threshed and sorted in the threshing machine, and the sorted kernels are transferred by the first transfer spiral provided at the lower portion in the threshing machine, and the first transfer is performed. It is supplied into the helix spiral metal 3 provided at the end of the spiral,
The frying spiral 5 provided inside the frying spiral metal 3 and the frying transfer cylinder 4 provided on the upper side has an outer diameter at a lower end portion (a) substantially equal to the inner diameter (L) of the frying transfer cylinder 4. The same large outer diameter (L1) is used. From this large outer diameter (L1), the tape is sequentially taped to the smaller outer diameter (L2) of the outer diameter of the portion located at the upper end (b) of the fried spiral metal 3. As the shape (A), a straight shape (B) having the same outer diameter as the small outer diameter (L2) is formed from the small outer diameter (L2) to the upper end portion (C) of the deep-fried helix 5. Then, the sorted kernels are handed over to the filing spiral 5 and the inner surface of the filing spiral metal 3 is formed in the same shape as the taper shape (A). Is quickly pumped down by the filing spirals 5, is sequentially pumped up, and is supplied into the grain storage tank for temporary storage.

[0006]

According to the present invention, the outer diameter portion of the filing spiral 5 located in the filing spiral metal 3 has a tapered shape (A) in which the upper part is reduced in diameter from the large outer diameter (L1) to the small outer diameter (L2). Is formed in the spiral spiral metal 3, the kernels are quickly lifted to the upper part and do not stagnate, and therefore, the kernels in the spiral spiral metal 3 Clogging can be prevented.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A threshing machine 2 mounted on a combine 1
The filing spiral metal 3 provided at the lower part on the right side of the right and the frying transfer cylinder 4 provided on the upper side of the filing spiral metal 3 are provided with a filing spiral 5 for internally feeding the grain. Will be described. A traveling device 6 having a pair of left and right traveling rollers 6b for traveling on the soil surface is disposed below a chassis 6a of the combine 1 and a feed chain 7 and a clamping rod are arranged above the traveling chassis 6a. The threshing machine 2 mounted with a grain storage tank 9 mounted on the side thereof for threshing the harvested grain culm which is transported by being pinched by 8 or the like, sorting and collecting threshed grains and temporarily storing them.

At the front of the threshing machine 2, a weeding body 10 for separating the raised culm from the front end, a raising device 11 for raising the separated cereal culm, and a mowing for cutting the raised cereal culm It has a blade device 12, a grain stalk raking device 13 for scraping and transferring the harvested grain stalk to the feed chain 7 and the holding rod 8, and a grain stalk layer pressure sensor 14a and a speed sensor 14b. A reaper 15 including a grain culm transport device 14 and the like is provided, and the reaper 15 is provided by a hydraulically driven telescopic cylinder 15a.
It is a structure that acts on the soil surface so that it can move up and down.

On the threshing machine 2 side, an operating device 16 for controlling the operation of the combine 1 and a cockpit 1 on which an operator rides are provided.
And a lower portion of the cockpit 17 is provided with an engine 18.
And a grain storage tank 9 is installed on the rear side. The traveling device 6, the threshing machine 2, the reaper 15, the engine 18, and the like constitute an airframe 19 of the combine 1.

In the conveying path of the cereal stalk formed by the cereal stalk conveying device 14 of the reaper 15, the culm is supplied to the threshing machine 2 by contacting the cut culm to be transferred. Is provided. A vehicle speed sensor 21a for detecting the traveling vehicle speed based on the output rotation speed is provided in the transmission path of the traveling mission 21 mounted on the front end of the chassis 6a.

As shown in FIGS. 2 and 3, a support frame 22 having a rear portion formed in a gate shape is provided on the upper side of the chassis 6a and on the rear side of the engine 18. The support frame 22 and the front end of the chassis 6a are provided at the front end of the chassis 6a. The provided front cover 22a is a U-shaped connecting rod 22.
This is a configuration connected by b. A receiving boss 23 having an insertion hole 23a at a substantially central portion is fixedly provided on both upper and lower sides of a support portion outside the support frame 22.

An engine cover 24 is rotatably mounted on the right outer side of the engine 18. A reinforcing member 24a is mounted on the inner surface of the engine cover 24. Rotating bosses 25, 25 having insertion holes 25a substantially in the center are fixedly provided on the upper and lower sides of the rear side surface, and seat covers 24b are provided on the front portions. The cockpit 17 is provided above the reinforcing member 24a.

Between the receiving bosses 23 of the support frame 22, rotating bosses 25, 25 provided on a reinforcing member 24a of the engine cover 24 are inserted, and each of the receiving bosses 23 and the rotating boss 25 is inserted. A rotation pin 26 is inserted into the holes 23a and 25a to rotate the engine cover 24. As shown in FIG. 3, a predetermined gap (M) is provided between the grain storage tank 9 and the engine cover 24, and a gap cover 27 is provided in the gap (M). At a position (N) outside the gap cover 27, the engine cover is disposed.
The rotation pins 26, 26, which are the rotation fulcrums of the motor 24, are provided so as to be positioned so that the rotation of the engine cover 24 is facilitated.

Thus, the rotation fulcrum of the engine cover 24 is located outside the gap cover 27, and the entire width of the gap cover 27 in the front-rear direction is widened. Can be opened at an opening angle of 90 ° or more, and inspection and repair of the vicinity of the engine 18 are facilitated. Left and right downflow guide bottom plates 9a and 9b are provided on both left and right sides of the lower part of the grain storage tank 9,
In the lower part, a tank transfer spiral 9c is pivotally provided, and a U-shaped receiving frame 28 as shown in FIGS. 4 and 5 is bolted on the outer surface of the right-flow guide bottom plate 9b on the right side. A tank motor 28a is mounted on one side of the receiving frame 28, and a motor shaft 28b of the tank motor 28a is provided on both front and rear sides of the receiving frame 28. In this configuration, the shaft is supported by metals 28c and 28c. A modified weight 29 is mounted on the shaft end of the motor shaft 28b.
The right downflow guide bottom plates 9a and 9b are vibrated to prevent the stagnation of high moisture value kernels on the downflow guide bottom plates 9a and 9b.

As a result, the grains having a high moisture value stagnating on the left and right downflow guide bottom plates 9a and 9b of the grain storage tank 9 are
The stagnation can be prevented by the generation of vibration by the rotational driving of the deformed weight 29. The threshing machine 2
As shown in FIG. 6 to FIG.
In addition to supporting the handle cylinder shaft 31b, the front inside the threshing chamber 30 is configured such that a front handle cylinder 32 equipped with a large number of tooth extractions 31a of various types is supported by a handle cylinder pipe 32a, It is a configuration divided into two parts before and after. The handle barrel shaft 31b is supported between the front wall 2a and the middle wall 2b in the front-rear direction.
The handle cylinder pipe 32 is rotatably supported by front and rear receiving members 32b and 32c provided on the handle cylinder shaft 31b.

The rear cylinder 31 is driven to rotate by a front cylinder pulley 33a provided at the front end of a cylinder shaft 31b.
The front cylinder 32 is driven to rotate by a rear cylinder pulley 33b provided at the front end of the cylinder pipe 32b, and the front and rear cylinders 32 and 31 are separately driven to rotate. . As shown in FIG. 10, the rotation speed of the rear handling cylinder 31 is controlled based on the traveling vehicle speed during operation of the traveling device 6 detected by the vehicle speed sensor 21a in the traveling mission 21 at the time of harvesting by the combine 1. The configuration is linked to the control of the feed speed of the feed chain 7 to be controlled. When the traveling speed of the traveling device 6 is high, and the feed chain 7 is accelerated to perform high-speed transfer control, the number of rotations of the rear-handling cylinder 31 is also controlled to be high. When the traveling speed of the traveling device 6 is low and the feed chain 7 is decelerated to perform low-speed transfer control, the rotation speed of the rear-handling cylinder 31 is also controlled to be low.

At the right side of the threshing room 30 in plan view, the rear handling cylinder 31
On the rear side, a dust treatment chamber 3 for threshing again while transferring the unthreshed processed material discharged from the threshing chamber 30 backward.
4 is formed, and a dust discharge spiral 35 is provided in the dust treatment chamber 34.
a and a dust processing cylinder 35 equipped with dust discharging blades 35c
Is supported by a dust discharge shaft 35b.
“b” is a configuration supported between the front wall 2a and the rear wall 2c in the front-rear direction.

A second processing chamber 36 is formed at the front side of the dust processing chamber 34, and a large number of threshing processing is performed again while transferring the second material supplied into the second processing chamber 36 forward. The configuration is such that a second processing cylinder 37 on which a second processing tooth 37a and a second discharge blade 37b are mounted is supported by a coaxial dust shaft 35b. A feed chain 7 and a clamping rod 8 for clamping and transferring the harvested culm are arranged along a handle 38 on the left side of the threshing room 30 in plan view, and are handled from the lower part of the outer periphery of the teeth 31a. A handling net 38b surrounding the body cover 38a is provided, and the dust treatment chamber 34 is provided with a leaking tool 39 surrounding the lower part of the outer peripheral edge of the dust spiral 35a.

A handling room discharge port 38c is provided at the transfer end of the handling net 38b in front of the middle machine wall 2b. A dust discharge port 39a is provided at the transfer end of the leaking tool 39. The second processing chamber 36 has a configuration in which a second receiving plate 40 surrounding the lower side of the outer peripheral edge of the second processing tooth 37a is disposed. At the end of transfer of the second receiving plate 40, a second discharge port 4 is provided.
0a is provided.

The feed chain 7 is, as shown in FIG. 11, a front sprocket 41a at the transfer start end of the chain slide 41.
And a shaft supported by a gear case 42 at the end of the transfer, and then bridged over a sprocket 42a. The gear cage
A continuously variable transmission 42b is provided inside the gear 42, and the speed of the feed chain 7 is increased and decreased by controlling the rotation speed of the rear sprocket 42a by the continuously variable transmission 42b. The speed is controlled, and the control of the transfer speed is linked to the running speed of the running device 6 during work.

The speed change pulley 43 supported on the shaft end of the continuously variable transmission 42b includes a front counter pulley 43a, a first pulley 43b, a second pulley 43c, and a rear counter large pulley. 4
The belt is driven to rotate by belts 44a and 44b wrapped around 3d and a rear small pulley 43e. By controlling the rotation speed and the transfer speed of both the rearward-handling cylinder 31 and the feed chain 7 based on the running speed of the running device 6 during the operation, the feed chain 7 is accelerated. At times, the passing speed of the grain stalk in the threshing room 30 is reduced by setting the rotation speed of the rear handling cylinder 31 to a high number of revolutions.
By increasing the number of times that abuts on the grain culm, it is possible to prevent untreated. Further, when the feed chain 7 is at a low speed, the rotation speed of the rear-handling cylinder 31 is set to a low rotation speed, thereby reducing damage to straw and preventing the generation of straw chips.

The layer pressure of the cereal stem detected by the cereal stalk layer pressure sensor 14a provided in the cereal stalk transport device 14 and the speed sensor 14b for detecting the transfer speed of the cereal stalk transferred by the cereal stalk transport device 14 are provided. Depending on the transport speed to be detected, feed chain 7
The thickness of the layer at the transfer start end is determined, and the feed speed of the feed chain 7 is changed and controlled so that the feed chain 7 always has a constant layer pressure. When a speed difference of a predetermined value or more occurs between the transfer speed of transferring the cereal stalk by the cereal stalk transport device 14 and the transfer speed of transferring the cereal stalk by the feed chain 7, as shown in FIG. Let me clear
The feed speed of the feed chain 7 is changed and controlled to a high speed.

Thus, the feeding speed of the feed chain 7 is determined based on the cutting speed and the thickness of the grain culm, whereby the grain culm is always supplied to the threshing machine 2 with a constant thickness. As a result, the threshing performance is stabilized.
A pulley 56a is provided at the rear end of the handle cylinder shaft 31b as shown in FIG. 7, and the straw chain 57, which receives the supply of threshed straw from the feed chain 7 and transfers it backward, is driven to rotate. A pulley 56b is provided at the shaft end of the straw shaft 57b provided in the straw box 57a, and a belt 56c is stretched between the pulley 56a and the pulley 56b.
The straw chain 57 is rotatably driven from the handle shaft 31b via the belt 56c.

The handle cylinder shaft 31b, the rear handle cylinder 31, the feed chain 7, and the straw chain 57 are linked to the traveling vehicle speed based on the traveling vehicle speed of the traveling device 6 in operation.
Control of the rotation speed of the rear-handling cylinder 31;
And the transfer speed of the straw chain 57 is controlled. Thus, with a simple configuration, the rear-hand cylinder 31, the feed chain 7, and the straw chain 57 are linked with the running speed of the running device 6 to link with the running speed.
Since the relationship between the transfer speeds of the doughen 7 and the straw chain 57 can always be controlled to the same transfer speed, stable post-process work (cutting the cutter) becomes easy.

In the sorting chamber 45 below the threshing chamber 30, the dust processing chamber 34, and the second processing chamber 36, a swing sorting device 46 is provided as shown in FIGS. The dynamic sorting device 46 is divided into two parts, a pre-sorting section 47 and a post-sorting section 48. Frame plates 49 on the left and right sides of the pre-sorting section 47,
49, a transfer shelf 47a is provided.
A front roller 47 is provided on both left and right sides of the lower surface of the front end of 7a.
b, 47b rotatably supporting support plates 47c, 47c
Is provided. Left and right machine walls 50a, 5 of threshing machine 2
0b, a U-shaped front guide guide 50c, 5
0c is inclined rearward and upward at a predetermined angle (θ1). The front rollers 47b, 47b are inserted into the front guides 50c, 50c.
In this configuration, the front roller 47b swings in the vertical direction and the front-rear direction within 0c.

The left and right frame plates 51 of the post-selection unit 48,
A chief sheave 52a and a grain sheave 52b are sequentially provided from a front portion between the frame members 51, and a bottom plate 52c and a chief sheave 52 are provided at a lower front portion between the frame plates 51, 51.
This is a configuration in which a grind 52d is provided underneath a. The inclination angle of the chief sheave 52a is adjusted so that the amount of grain leakage can be adjusted.

The frame plates 51, 51 of the post-sorting section 48 include:
A support metal 53 is provided, and a eccentric cam 53b pivotally supported by an eccentric shaft 53a is provided in the support metal 53 so that the front / rear selecting portions 47 and 48 are oscillated. Connecting rods 54 a, 5 supported by support plates 54, 54 are provided on the left and right sides of the lower surface of the transfer shelf 47 a of the front sorting unit 47.
4a, the position (S1) from the upper end of the connecting rods 54a, 54a is attached to the frame plates 51, 51 of the post-sorting section 48 by pins 54b, 54b. Connecting rod 45a,
In the position (S2) below the position (S1) of the position 45a, the rear rollers 54c, 54c are rotatably supported at one end of the support shaft 55, and the other end. Has a transfer frame 47a fixedly provided with a receiving frame 55a.

Left and right machine walls 50a, 50b of the threshing machine 2
U-shaped rear guides 50d, 50d
Is inclined to a rear upper portion at a predetermined angle (θ2). Rear guides are provided in the guides 50d, 50d.
Insert the guides 54c, 54c, and thereafter, guide guides 50d,
The rear rollers 54c, 54c are swingable in the vertical direction and the front-back direction in the inside 50d.

(S1) <(S2), and
The configuration is such that (θ1)> (θ2), and the pre-sorting section 47 has a configuration in which the swing-up angle is larger than that of the post-selection section 48. Thus, by increasing the swing angle of the transfer shelf 47a of the pre-sorting section 47, the transfer shelf 47a
The processed material supplied to the top moves up and down,
Specific gravity sorting becomes easy, and sorting performance can be improved.

A blower 58 in which a blower blade 58a is rotatably mounted is provided below the start end (upper side) of the swinging sorter 46 in the transfer direction, and the sorting wind generated by the blower 58 is blown by the blower 58. This is a configuration in which cereal grains, straw chips, dust, and the like are sorted by wind sorting and swing sorting by the swing sorting device 46. The lower end portion of the blower 58 is connected to the upper side of the first receiving gutter 60 to be fed laterally by the first spiral 60a in which the kernels selected while flowing down from the first sorting shelf 59 are accommodated. Configuration.

On the rear side (lower side) of the first sorting shelf 60, there is provided a second trough 61 having a second spiral 61a therein, and the upper end of one side of the second trough 61 is connected to the first trough 61. It is configured such that it is overlapped below the bottom gutter 60 and the upper end on the other side is overlapped below the lower end of the second sorting shelf 61b. The second spiral 61
The second threshing cylinder 62 provided with the second thrust spiral 62a for taking over the unthreshed processed material (secondary material) fed laterally in a and returning it to the second processing chamber 36 is mounted on the right wall of the threshing machine 2. This is a configuration that is obliquely provided outside of 50b.

Above the transfer end of the rocking sorter 46, dust and straw debris, etc., which have been sorted by the blower 58 and the rocking sorter 46 by wind sorting and rocking sorting, are put together. This is a configuration in which a dust fan 74 for discharging to the outside is provided.
At the end of transfer of the first spiral 60a, on the outer surface of the right machine wall 50b of the threshing machine 2, as shown in FIG. A pipe-shaped frying transfer cylinder 4 is provided above the filing spiral metal 3, and at the upper end of the frying transfer cylinder 4,
A box-shaped ejection box 63 provided with an ejection port 64 is provided, and a U-shaped mounting plate 66 is provided near the upper end,
The mounting plate 66 is mounted on a receiving plate 67 provided on the right machine wall 50b with bolts and the like, and the throw-out box 63 is mounted on the grain storage tank 9 with bolts and nuts.

The grain is transferred by the first spiral 60a to the helix spiral metal 3 and the hanger transfer cylinder 4, and the grains fed into the helix spiral metal 3 are handed over to the upper portion. This is a configuration in which the spiral 5 is provided inside. As shown in FIG. 1, the helix 5 is mounted on the outer diameter of a helix shaft 68. The lower end of the helix 68 is supported by the helix spiral metal 3 and projected to the upper end. Receiving metal 65 provided on box 63
This is the configuration supported by the shaft.

The outer diameter of the lower end portion (a) of the filing spiral 5 is formed to be substantially the same as the inner diameter (L) of the fry transfer cylinder 4 as a large outer diameter (L1). The outer diameter of the filing spiral 5 at a position near the upper end portion (b) of the filing spiral metal 3 at the position of the joint between the fryer transfer cylinder 4 and the fryer conveying cylinder 4 is defined as a small outer diameter (L2). The tapered shape (A) is formed between the outer diameter (L1) and the small outer diameter (L2).
The outer diameter between the portion 2) and the upper end portion (c) of the helix 5 has a straight shape (B) formed to have substantially the same outer diameter as the small outer diameter (L2). Further, the tapered shape (A) has a structure in which the lid is spiral. The fried spiral metal 3
And the tapered shape (A) of the filing spiral 5 are formed in substantially the same tapered shape (A).

In the tapered shape (A) portion of the above-mentioned spiraling spiral 5, the transport of grains is accelerated, and the stagnation of grains in the spiraling spiral metal 3 is prevented, thereby preventing the grain from being clogged. Configuration.
A discharge blade 69 having a predetermined length is provided above the upper end portion of the helix 5, and the discharge box 63 is provided by the discharge blade 69.
In this configuration, the grains fed by the filing spiral 5 are taken over and supplied to the grain storage tank 9 through the outlet 64 of FIG.

The kernels which have been pumped up by the above-mentioned kernel 5 and supplied to the grain storage tank 9 are transferred by a tank transfer spiral 9c provided in the lower part of the grain storage tank 9. Then, it is supplied into a vertical discharge support cylinder 70 provided with a vertical transfer spiral 70a provided on the rear side of the grain storage tank 9, and is pumped up by the vertical transfer spiral 70a. This vertical discharge support cylinder 70
Is a structure provided so as to be rotatable in a substantially vertical posture.

On the upper side of the vertical discharge supporting cylinder 70, a discharge auger 7 having a lower end serving as a fulcrum and having a discharge spiral 71a for discharging the whole length of the combine 1 to the front and rear of the combine 1 is provided.
1 is arranged in a lateral direction so as to be able to turn up and down and turn left and right. A control device 72 is provided in the operation device 16 as shown in FIG.
4b and a CPU 73 to which the detection values of the grain stalk layer pressure sensor 14a and the like are input. The CPU 73 transfers the feed speed of the feed chain 7 via the continuously variable transmission 42b, the number of rotations of the rear handling cylinder 31, and the running. The configuration is such that the traveling speed of the device 6 and the transfer speed of the dust exhaust chain 57 are controlled.

[Brief description of the drawings]

FIG. 1 is an enlarged front sectional view of a main part.

FIG. 2 is an enlarged side perspective view of an engine cover.

FIG. 3 is an enlarged plan view of an engine cover.

FIG. 4 is an enlarged front view of a grain storage tank unit.

FIG. 5 is an enlarged side view of a tank motor portion of the grain storage tank.

FIG. 6 is an enlarged sectional side view of the threshing machine.

FIG. 7 is an enlarged plan sectional view of the threshing machine.

8 is a sectional view taken along the line CC in FIG.

9 is an enlarged cross-sectional view taken along the line DD of FIG. 6;

FIG. 10 is a control relation diagram between a work vehicle speed, a feed chain, and a rear handling cylinder.

FIG. 11 is an enlarged side view of the transmission mechanism of the feed chain.

FIG. 12 is a diagram showing a control relationship between grain culm thickness and feeden.

FIG. 13 is a block diagram.

FIG. 14 is an overall side view of the combine.

[Explanation of symbols]

 3 Spiral Spiral Metal 4 Spiral Transfer Cylinder 5 Spiral Spiral L Inner diameter L1 Large outer diameter L2 Small outer diameter A Lower end B Upper end C Upper end A Tapered shape B Straight shape

 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kazuo Toyoda 1 Yakura, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. F-term (reference) 2B396 JA04 JC07 KA02 KA04 KC05 LA07 LL13 LL17 LN02 LN07 LN12 LN19

Claims (1)

[Claims] 1. A frying transfer cylinder 4 on an upper side of a lower frying spiral metal 3; a frying spiral 5 which is internally provided in the frying spiral metal 3 and the fryer transporting cylinder 4 and pumps grains. In the threshing machine provided with the above, the lower end portion (a) of the lowering portion of the filing spiral 5 in the filing spiral metal 3 (a) The large outer diameter (L1) of the outer diameter and the inner diameter (L) of the frying transfer cylinder 4 are substantially equal. The outer diameter of the filing spiral 5 at the position located at the upper end (b) of the filing spiral metal 3 is a small outer diameter (L
As 2), a tapered shape (A) is formed between the large outer diameter (L1) and the small outer diameter (L2), and the upper end portion (from the small outer diameter (L2) portion of the helix 5). Until c), a straight shape (B) having a small outer diameter (L2) having substantially the same outer diameter is formed, and the inner surface of the helix spiral metal 3 and the tape of the helix spiral 5 are formed. A grain transfer device for a threshing machine, wherein the grain shape is formed in a taper shape (A) which is substantially the same as the taper shape (A) portion.