JP2001028935A - Device for discharging grain - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a problem that soft skin grains, especially soybeans, among harvested grains are damaged to lower their commercial value, although a long vertical spiral disposed in a pipe and a grain-discharging spiral capable of being revolved in the vertical and lateral directions are generally used as means for discharging the harvested grains from a tank receiving the grains. SOLUTION: In this grain-discharging device, grains discharged from a tank discharge port 2 disposed at the lower end of a tank 1 are discharged from a grain discharge port 5 formed at the end of a grain guide pipe 4 with the wind force of a fan 3, and at least a prescribed portion ranging from a place near to the tank discharge port 2 to the fan 3 in an air duct 6 ranging from the fan 3 to the tank discharge port 2 is downward inclined toward the side of a grain discharge port 5. A forcibly carrying device 7 for forcibly carrying the grains to the tank discharge port 2 is further disposed in the tank 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain discharging device provided in a combine harvester for harvesting while moving in a field.

[0002]

2. Description of the Related Art As means for discharging harvested kernels from a tank, it is common to use a long vertical spiral wound inside a pipe and a horizontal spiral rotating vertically and horizontally.

[0003]

However, in the harvest,
Soft-grained kernels, especially those like soybeans, can be scratched and reduce their commercial value.

[0004]

SUMMARY OF THE INVENTION The present invention provides an outdoor moving vehicle that solves the above-mentioned problems, and employs the following technical means. In other words, the kernel discharged from the tank outlet 2 provided at the lower end of the tank 1 is discharged from the kernel outlet 5 formed at the tip of the kernel guide tube 4 by the wind of the blower 3, A grain discharging apparatus is provided inside the tank 1 in which a forced feeder 7 for forcibly feeding grains toward the tank discharge port side is provided.

The grains discharged from the tank outlet 2 provided at the lower end of the tank 1 are discharged from the grain outlet 5 formed at the tip of the grain guide tube 4 by the wind force of the blower 3. This is a grain discharging device provided with a forced feeding device 7 which forcibly feeds the grains toward the tank discharge port inside the tank 1.

[0006]

[Action] The harvested grain is supplied to the tank 1, and thereafter,
When discharging the grains, the discharging means is driven. Then, the grains stored in the tank 1 move downward, and the compressed air generated by the blower 3 passes through the wind path 6 and the grain guide pipe 4 to the grain discharge port 5 provided at the tip end. Get out of Grains coming out of the tank outlet 2 are conveyed by compressed air and discharged out of the machine through the grain outlet 5. Further, the forcible feeder 7 forcibly feeds the grains toward the tank outlet.

[0007]

[Effect] The discharge of the kernels in the tank is not performed by a long conveying spiral, but is performed by using compressed air instead of bouncing by a high-speed rotating plate. The occurrence of damage can be reduced and the commercial value can be increased. Since the compressed air from the blowing means passes below the tank discharge port 5 through the downwardly sloping air path 6, the flow of the compressed air is smooth, and the performance of discharging the grains discharged from the tank 1 is improved. be able to.

[0008] Further, the grains in the tank are forcibly fed to a feeder 7.
Therefore, even if a part of the compressed air enters the tank, the discharge operation from the tank 1 can be smoothly performed, and the time required for the discharge can be shortened.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be specifically described below with reference to the drawings. First, the structure will be described. The combine 8 is a normal combine and has a front part of a chassis 10 provided with a traveling device 9 disposed at a predetermined interval in the left-right direction in the forward direction of the fuselage. The mowing unit 11 is provided so as to be able to move up and down by hydraulic lifting means, a threshing unit 12 is provided on the left side of the chassis 10 behind the mowing unit 11, and the tank 1 is provided on the right side of the threshing unit 12.
An operating unit 13 is provided in a space between the tank 1 and the cutting unit 11.

The cutting section 11 includes a weeding device 14, a rotary scraping reel 15, a cutting device 16, and an elevator-type grain culm conveying device 17 for conveying the cut culm upward and rearward. Are configured integrally, and are configured to be able to move up and down by an elevating cylinder 18. The threshing unit 12 receives all of the cereal culm transported by the cereal culm transport device 16 and performs threshing with a rotating cylinder. The processed material leaked from the net is sorted by a sorting device such as a Karamin or rocking sorting shelf. It is a form of sorting, and it is a whole culm input type configuration. Then, the sorted kernels are transported to one side of the sorting room, and are transported upward by the frying apparatus 19. The fryer 19 comprises an endless belt that rotates in the vertical direction, and buckets attached to the endless belt at predetermined intervals. When the bucket moves, the bucket pumps up a predetermined amount of grains and transports the grains upward. It is a configuration to discharge.

The tank 1 is a hollow box in which a lower portion is made thinner by an inclined surface, a bottom surface is opened at a lower end portion thereof, and a cylindrical body 20 having a tank outlet 2 is formed. It is configured to communicate with a fryer discharge port (not shown) provided at the upper part of the fryer 19, and to open laterally and outwardly about a vertical axis provided on the rear side and arranged vertically. . The upper end of the cylindrical body 20 is detachably provided at the lower end of the tank 1, and the lower end of the cylindrical body 20 is formed to have an inverted T-shape by increasing the entrance portion A and decreasing the exit portion B. An open lower kernel guide tube 34 is provided.

The forced feeder 7 is provided with a spiral 22 extending from the lower part of the tank 1 at the center of the tank to the cylindrical body 20 and forcibly feeds the grain downward when rotated about the vertical axis. A possible forced feed spiral shaft 21 is provided. The upper end of the vertical hollow body 23 containing the forced feed spiral shaft 21 is fixed substantially vertically to the middle of a horizontal hollow body 24 having a horizontal axis fixed between the inner walls of the tank 1. Although the vertical hollow body 23 and the horizontal hollow body 24 use circular pipes in the embodiment, they may be square.

The forced spiral shaft 21 has an upper portion and an intermediate portion rotatably provided on a vertical hollow body 23 via a bearing 25, a bevel gear 26 attached to an upper end portion, and a lower end portion provided at a free end. The bevel gear 26 has one end protruding outward from the tank and meshes with a bevel gear 29 attached to the other end of a horizontal shaft 28 rotatably housed in a horizontal hollow body 24 via a bearing 27. A ring 30 attached to the end of a horizontal shaft 27 protruding outward from the tank is an endless belt between a ring 32 attached to a shaft end of a motor 31 detachably attached to the machine frame. 33 to form a transmission.

The blower 3 is composed of a case 35 and a rotating fan 37 which is housed in the case 35 and which is provided with a motor 36 as a drive source and whose rotation speed is adjustable. The discharge-side end of the case 35 is detachably connected to one end of the grain guide tube 4 via a wind guide tube 38 at the entrance a of the lower grain guide tube 34 so as to be detachable. The road 6 is formed. The air guide tube 38 has a predetermined length extending obliquely upward from the connection with the lower kernel guide tube 34. That is, the air passage 6 reaching the tank discharge port 2 is inclined downward, so that the compressed air enters the lower grain guide tube 34.

The grain guide tube 4 is formed of a flexible hollow flexible tube body having an inner surface formed smoothly, and one end portion of the lower grain portion on the side opposite to the side connected to the air guide tube 38. A lower kernel guide 4a removably attached to the outlet b of the guide tube 34, a vertical kernel guide 4b bent L-shaped with the middle part facing upward, and an L-shape with the upper part oriented horizontally. And a moving horizontal grain guide 4c that is bent.

The lower frame 39 is formed in an L-shape so as to cover the bent portion between the lower grain guide portion 4a and the vertical grain guide portion 4b of the grain guide tube 4, and has a circular flange 40 at the upper end. It is provided integrally and the lower end is fixed to the machine frame. The vertical frame 41 is provided integrally with a circular flange 42 at the lower end thereof which overlaps the flange 40 in the vertical direction via a sliding material. An outer peripheral portion of the flange 42 forms a gear portion that meshes with a gear fixed to a distal end portion of a motor shaft of a forward / reverse rotation motor 43 fixed to the machine frame, and is configured to be able to rotate forward and backward.

Reference numeral 44 denotes an upper and lower frame which is supported from the distal end to the base of the movable horizontal grain guide 4c, and the grain discharge port 5 provided at the distal end of the storage movable horizontal grain guide 4c has a lower side. Located in. Reference numeral 45 denotes an elevating frame whose lower end is pivotally connected to the vertical frame 41 via a horizontal axis so as to be vertically rotatable, and whose upper end is fixed to the base of the upper and lower frames 44. The base of the upper and lower frames 44 is provided so as to be able to move up and down by an elevating device 45 composed of a piston, a cylinder, etc., which expands and contracts by hydraulic pressure. The expansion and contraction of the piston is performed by switching the hydraulic valve 46, which is the same as that of a general means.

The driving unit 13 provided in the cabin 47 has a seat 48 having a backrest, and a left operating wall 49 and a front operating wall 50 extending in the forward direction of the fuselage from the left lateral side of the seat to the front. In the corner formed by the left operation wall 49 and the front operation wall 50, the front end of the left operation wall has a lower inside (outer corner).
The instrument panel is provided diagonally so as to face the seat with its side) raised and has a rotation indicator, a paddy amount indicator for displaying the amount of paddy stored in the tank 1, a fuel indicator, and the like. I have.

The left operating wall 49 has a speed change lever (HST lever) for changing the vehicle speed, a sub speed change lever for changing the vehicle speed, and a threshing lever for turning on and off the power to the threshing section.
And a cutting lever for turning on and off the power to the cutting section is provided so as to be rotatable in the front-rear direction. Further, a throttle lever for adjusting the number of revolutions of the engine is rotatably provided at the front of a slope formed on the right side (inside) of the left operation wall 49. The instrument panel is provided at a position where the driver sitting on the seat 48 can view each indicator on the instrument panel even when the gearshift lever is turned to the front (highest speed) side. It is provided so that the operating status such as presence or absence can be easily grasped. And the instrument panel cover
Is made of a material which is transparent and reduces or cuts ultraviolet rays, thermal warfare, etc., and has a high upper portion to prevent deterioration of the display device.

A buzzer stop switch, a display changeover switch, a work light switch, a turn signal and a horn switch, a key switch, and the like are provided above the front operation wall 50, and an operation lever 51 is provided at the right end. . The operation lever 51 is configured to raise and lower the reaping unit when tilted forward and backward, and to change the traveling direction of the machine body when tilted left and right.
5 and a lever protruding obliquely so that the upper end is located on the seat side (driver's side), a grip provided on the upper end of the lever, and the like.

The switches 52, 53, 54 and 55 which are turned on and off by tilting the operation lever 51 are a contact type such as a limit switch, a non-contact type such as a photoelectric switch, a potentiometer or a differential. A transformer may be used. For example, when it enters, the CPU 56 of the microcomputer
The actuator is actuated in response to a command signal from the controller, and the direction of movement of the machine body is changed by raising and lowering the reaping unit by expansion and contraction of a hydraulic cylinder and the like, and by switching on and off the steering clutch and brake.

Referring to the block diagram of FIG. 9, reference numeral 56 denotes an arithmetic control unit (hereinafter referred to as a CPU) of a microcomputer having a memory having necessary data, control programs and the like. And work such as comparison operation. Then, an input interface 57 is provided to the CPU 56.
Switches 52, 53, 54 and 55 which are turned on and off by tilting the operation lever 51
Of the cutting unit and the left and right turning information of the machine, the grain discharge information from the grain discharge switch 59, the grain guide tube turning information from the grain guide tube turning switch 60, and the grain guide tube lifting switch There is also information such as grain guide tube lifting / lowering information from the controller 61, and a drive command signal to the motors 31 and 36 and a signal to the forward / reverse motor 43 as signals output from the CPU 56 via the output interface 58. Drive command signal, grain guide tube 4
, A switching signal to a hydraulic valve 62 for raising and lowering the mowing part, a switching signal to a hydraulic valve 63 for turning the machine body, and the like.

Next, the operation will be described. First, when the driver opens and closes the door of the cabin 47, sits on the seat 48, depresses the parking brake pedal, turns on the key and starts the engine, and the power output from the engine is transmitted via the transmission mechanism. Power is transmitted to each part of the body's rotation. Then, the throttle lever is turned to select the engine at a predetermined rotation speed, and the sub-transmission lever is turned forward to select, for example, the standard, and further operate the threshing lever and the reaping lever. When the threshing unit 12 and the reaping unit 11 are driven, the machine conditions and the like are displayed on each indicator on the instrument panel.

When the preparation for the harvesting work is completed, the depressing of the parking brake pedal is released, and then the speed change lever is turned forward to move the machine forward and tilt the operation lever 51 forward or backward. Switch 52 or 53 is turned on. Then, the CPU 56, which has received the reaping unit elevating information via the input interface 57, outputs a switching signal to the reaping unit elevating hydraulic valve 62 via the output interface 58 to extend and retract the elevating cylinder to cut. The unit 11 is moved up and down to a desired position.

When the operation lever 51 is tilted left and right to turn on the switch 53 or 54, the input interface 5
The CPU 56, which has acquired the information of the aircraft turning (correction of the traveling direction of the aircraft to the left or right) through the output interface 7, is provided.
A switching signal is output to the hydraulic valve 63 for turning the aircraft through the face 58, and the left turning cylinder or the right turning cylinder (not shown) is operated to turn the traveling direction of the aircraft to a desired position.

As described above, the weeder 14 is adjusted to a predetermined length while changing the height of the reaper 11 relative to the ground and the traveling direction of the machine body. Then, the root portion of the grain stalk that has been scraped rearward by the rotating scraping reel 15 is cut off by the reaping device 16 and then inherited by the grain stalk transport device 17 and transported rearward and upward. Then, the grain culm that has reached the transport end portion is sent into the handling room of the threshing unit 12 and processed. The processed material produced by this is subjected to wind screening, and the grains separated into grains and straw chips are pumped up and bucketed into buckets of the graining apparatus 20 which moves in the vertical direction. Is sent to and accommodated.

Then, when the grains in the tank are full,
The driver interrupts the harvesting operation and moves the grain guide tube up / down switch 6
When 1 is entered, the CP in which the grain guide tube elevating information is input
U56 outputs a switching signal to the hydraulic valve 46 via the output interface 58, so that the lifting cylinder of the lifting device 45 extends and moves up the grain guide tube 4 via the upper and lower frames 44.

Next, when the grain guide tube turning switch 60 is turned on, the CPU 56 which has inputted the grain guide tube turning information is inputted.
Is the forward / reverse motor 4 via the output interface 58.
3 outputs a start signal for normal rotation. Then, the rotational power of the forward / reverse rotation motor 43 turns counterclockwise through the vertical frame 41 and the upper and lower frames 44 via the motor shaft gear and the vertical frame side gear. The moving grain guide 4c of the guide tube 4 also turns in the same direction (left side). Thereafter, when the operator determines that the desired position has been reached and turns off the grain guide tube turning switch 60, the forward / reverse rotation motor 43 is stopped by the command of the CPU 56 via the output interface 58. The vertical frame 41, the upper and lower frames 44 and the moving grain guide 4c also stop.

Then, when the driver interrupts the harvesting operation and turns on the grain guide tube raising / lowering switch 61, the CPU 56, which has input the grain guide tube raising / lowering information, sends the information to the hydraulic valve 46 via the output interface 58. A switching signal is output, and in connection with this, the lifting cylinder of the lifting device 45 is shortened and descends the moving grain guide 4c via the upper and lower frames 44. Thereafter, when the moving grain guide 4c reaches a predetermined position via the upper and lower frames 44, the grain guide tube raising / lowering switch 61 is turned off to output a signal from the CPU 56 to the hydraulic valve 46. Is stopped, so that the lowering of the moving kernel guide 4c is stopped.

When the movable grain guide section 4c has moved to a desired position or more, or when it is to be returned to the original position, the grain guide tube turning switch 60 is turned on.
What is necessary is just to output a reverse rotation start signal from the CPU 47 to the forward / reverse rotation motor 33 via the output interface 49. Next, when the grain discharge switch 59 is turned on, the CPU 56 which has input the grain discharge information outputs the output interface 58.
, A start signal is output to the motor 31 via the motor, and in this connection, the rotational power of the motor 31 is transmitted through the wheels 30, 32 and the endless belt 33 and is supported by the bearing 27. Is rotated. The rotation of the horizontal shaft 28 rotates the forced feed spiral shaft 21 supported by the bearing 25 via the bevel gears 26 and 29, and the spiral 22 rotating in association with the rotation is stored in the tank 1. The lower kernel is forcibly conveyed toward the tank outlet 2 of the cylinder 20.

Therefore, even if the compressed air passes through the cylindrical body 20 and enters the tank, the grains can be smoothly discharged downward, so that there is no clogging or stagnation in the tank and the grains from the tank 1 Discharge work efficiency can be improved. The CPU 56 outputs a start signal to the motor 36 via the output interface 58 to rotate the rotating fan 37 of the blower 3.
8 enters the lower kernel guide tube 29 through the entrance a of the lower kernel guide tube 29, and the lower kernel of the kernel guide tube 4 together with the kernel discharged from the tank outlet 2 into the lower kernel guide tube 29. The grain is discharged from the grain outlet 5 through the guide 4a, the vertical grain guide 4b, and the moving grain guide 4c.

At this time, the air guide tube 38 is connected to the lower grain guide tube 3.
A predetermined length is formed diagonally upward from the connection with the tank 4, that is, since the air passage 6 leading to the tank outlet 2 is inclined downward, the compressed air of the rotating fan 37 flows to the lower grain guide tube 34. As the air flows downward, the blow-by of the compressed air becomes smooth. Further, since the lower kernel guide tube 34 is also inclined downward toward the discharge direction, the kernels in the lower kernel guide tube 34 are also easily moved to the discharge side. Therefore, the flow of the compressed air and the ease of movement of the grains are combined, so that the efficiency of the operation of discharging the grains by the compressed air can be improved, and there is no generation of residual grains. In addition, since the discharge is not performed by the spiral, damage to the grain can be prevented, and the quality can be improved.

The grains discharged outside the machine from the grain discharge port 5 are collected in a storage unit such as a truck or a carrier.
When the grain discharging operation is completed, the grain discharging switch 59 is turned off to stop driving the motors 31 and 36, and the rotary fan 37 is stopped.

[0034]

Another Embodiment 1 A second air guide tube 64 made of a flexible tube whose length can be changed and which is flexible by branching a middle portion of the air guide tube 38 is provided. An electromagnetic valve 66 capable of switching the feed direction is provided. When the valve changeover switch 67 is switched to the air guide tube 38, the CPU 56 that has input this information through the input interface 57 operates the electromagnetic valve 66 through the output interface 58,
Since the air guide tube 38 communicates with the lower kernel guide tube 34, the compressed air generated by the rotary fan 37 is sent to the lower kernel guide tube 34 through the case 35 and the air guide tube 38. Thereby, the same grain discharging operation as described above can be performed smoothly.

When the valve changeover switch 67 is switched to the second air guide tube 64, the CPU 56 which has input this information through the input interface 57 operates the electromagnetic valve 66 through the output interface 58, Since it communicates with the air path to the second air guide tube 64, the compressed air generated by the rotary fan 37 is blown out of the opening 68 at the end of the second air guide tube 64 through the case 35 and the air guide tube 38. .

Thus, in the harvesting operation by the combine 8, if the opening 68 of the second air guide tube 64 is desired to be close to the uncut culm, the compressed air blown out from the opening 68 is attached to the uncut culm. Since the dew can be blown off, it is possible to prevent clogging in the handling room and the sorting room of the threshing unit 12 and to prevent the processed material from being in a dumpling state, thereby improving the efficiency of the harvesting operation.

The second air guide tube 64 is formed of a flexible tube whose length can be changed. The second air guide tube 64 is formed on the frame of the body so that the position of the opening 68 can be changed in the lateral direction and the front-back direction of the body. Since it is fixed, it does not hinder the rotating parts and operating parts of the fuselage, and can be used for work other than dew removal, thereby increasing the applicable range of work. Also,
It is also possible to fix the opening 68 of the second air guide tube 64 at a fixed position to perform the dew removal operation.

As described above, the compressed air of the rotary fan 37 can be used for the operation of discharging the grains and the operation of blowing off moisture such as dew, so that the air blowing device 3 can be effectively used. After the work is completed, the compressed air blown from the second air guide pipe 64 is blown out by the threshing unit 1.
2. Since it can be used for cleaning straw and residual particles remaining in the reaper 11, the traveling device 9, and the like, there is no need to separately prepare the blower 3, which can contribute to cost reduction. .

[0039]

Second Embodiment The shutter 69 is formed of a rectangular flat plate.
An opening 70 of the cylindrical body 20 is provided at an intermediate portion of the cylindrical body 20 so as to be opened and closed by moving laterally. A rack 71 is provided on one side surface of the shutter 69, and the rack 71 is engaged with a pinion 74 attached to a distal end of a motor shaft 73 of a forward / reverse rotation motor 72 for opening and closing the shutter.

When the shutter open / close switch 75 is switched to close the shutter, the CPU 56 which has input this information through the input interface 57 outputs the output interface 58
To start the forward / reverse motor 72 in the forward direction. Then, since the pinion 74 meshing with the rack 71 rotates and moves the shutter 69 in the lateral direction, the opening 70 of the cylindrical body 20 is closed. At this time, the CPU 56 is configured not to output a start command signal to the motor 31 via the output interface 58.

When the grain discharge switch 59 is turned on, the CPU 56 outputs a start signal to the motor 36 via the output interface 58 to rotate the rotating fan 37 of the blower 3. Pressure wind
35, the lower grain guide tube 29 enters the lower grain guide tube 29 through the inlet a of the lower grain guide tube 29 from the air guide tube 38, and the lower grain guide portion 4a of the grain guide tube 4 from the tank discharge port 2, the vertical grain. Guide 4
b and the moving grain guide 4c, and is discharged from the grain outlet 5 to the outside of the machine.

Similarly, the upper and lower frames 44 are stopped at a desired position on the uncut culm side by operating the grain guide tube raising / lowering switch 61 and the grain guide tube turning switch 60 in the same manner as described above. And the compressed air discharged from the grain outlet 5 to the outside of the machine is blown to the uncut kernels, so that in the harvesting operation, water drops such as dew on the uncut kernels can be blown off. As it can prevent clogging in the handling room and sorting room and prevent the processed material from becoming a dumpling,
Harvesting work efficiency can be improved.

A compressed air dispersing device (not shown) communicating with the grain discharge port 5 and having a large number of nozzles and capable of dispersing compressed air over a wide range is detachably attached to the leading end of the upper and lower frames 44. The efficiency of water droplet removal operation is further improved. When performing the grain discharging operation, when the grain discharging switch 59 is turned on, the CPU 56 which has input this information through the input interface 57 causes the forward / reverse motor 72 to rotate through the output interface 58. Start in the reverse direction. Then
Since the pinion 74 meshing with the rack 71 rotates and moves the shutter 69 in the lateral direction to open the opening 70 of the cylindrical body 20, when discharging the grain, it is possible to prevent the problem that the grain is not discharged from the tank 1. can do. Also,
At the time of grain discharge, the operation of the shutter open / close switch 75 and the operation of the grain discharge switch 59 can be performed by one operation, so that the operation is simplified.

Then, the CPU 5 having input the grain discharge information
6 outputs an activation signal to the motor 31 via the output interface 58, and in connection with this, the motor 31
Is transmitted through the wheels 30, 32 and the endless belt 33 to rotate the horizontal shaft 28 supported by the bearing 27. The rotation of the horizontal shaft 28 causes the bevel gear 2
The forced feed spiral shaft 21 supported by the bearing 25 rotates via the bearings 6 and 29, and the spiral 22 rotating in association with this rotates the lower grain stored in the tank 1 into the opening of the cylindrical body 20. Forcibly transported from 70 to the tank outlet 2.

Therefore, even if the compressed air passes through the cylindrical body 20 and enters the tank, the grains can be smoothly discharged downward, so that there is no clogging or stagnation in the tank and the grains from the tank 1 Discharge work efficiency can be improved. The CPU 56 outputs a start signal to the motor 36 via the output interface 58 to rotate the rotating fan 37 of the blower 3.
8 enters the lower kernel guide tube 29 through the entrance a of the lower kernel guide tube 29, and the lower kernel of the kernel guide tube 4 together with the kernel discharged from the tank outlet 2 into the lower kernel guide tube 29. The grain is discharged from the grain outlet 5 through the guide 4a, the vertical grain guide 4b, and the moving grain guide 4c.

[Brief description of the drawings]

FIG. 1 is a right side view of a combine.

FIG. 2 is a left side view of the combine.

FIG. 3 is a side view of the tank.

FIG. 4 is a plan view of a tank.

FIG. 5 is a side cross-sectional view of the lower part of the tank with a part cut away.

FIG. 6 is a plan view of a combine obtained by branching an air guide tube.

FIG. 7 is a plan view of a grain guide tube turned to remove dew.

FIG. 8 is a side cross-sectional view of the lower part of the tank in which a shutter is provided on a cylindrical body and the tank is partially cut away.

FIG. 9 is a block circuit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tank 2 Tank discharge port 3 Blower 4 Grain guide tube 5 Grain discharge port 6 Air path 7 Forced feeder

Claims (2)

[Claims] 1. A grain discharged from a tank discharge port (2) provided at a lower end of a tank (1) is discharged from a grain discharge port (5) formed at a tip of a grain guide pipe (4) by wind force of a blower (3). A grain discharge device having a configuration, wherein a predetermined portion of the air passage 6 from the blower device 3 to the tank discharge port 5 toward at least the tank discharge port toward the blower device 3 is inclined downward toward the grain discharge port side. 2. A grain discharged from a tank discharge port 2 provided at a lower end of a tank 1 is discharged from a grain discharge port 5 formed at a tip end of a grain guide tube 4 by wind force of a blower 3. A grain discharging device comprising a tank and a forced feeding device for forcibly sending grains toward a tank outlet side inside the tank.