JP2003111511A - Grain-discharging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grain-discharging device which can improve the certainty of grain leak prevention, reduce troubles against the efficiency of grain- discharging works, and facilitate maintenance works. SOLUTION: This grain-discharging device is characterized by disposing a grain-discharging auger exit cylinder 7 having a downward opened grain- discharging port 8 at the tip of a grain-discharging auger 6 connected to a vertical grain-elevating device 5 for discharging grains in a grain tank 4, and further disposing a closing shutter 10 for opening or closing the auger cylinder exit portion 12 of the auger cylinder 11 of the above-described grain-discharging auger 6 in the grain-discharging auger exit cylinder 7.

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, and particularly to a grain discharging auger outlet tube having a grain discharging port for discharging a grain that temporarily discharges grains stored in a grain tank. It is related to the part.

[0002]

2. Description of the Related Art In the publicly known Japanese Utility Model Publication No. 63-103245, a grain discharge port of a discharge auger for discharging grains temporarily stored in a grain tank is provided with a shutter that moves in the axial direction of the auger spiral. The configuration is described in which the shutter is always biased in the closing direction by the spring and is opened by the screw feeding action accompanying the rotation of the screw shaft.

[0003]

In the above-mentioned known example, since the shutter is always closed by the spring, there is a problem that the grain leaks when the spring pressure is insufficient. In addition, since it moves to the tip of the screw shaft to open the auger barrel outlet, there is a problem that it interferes with the grains discharged from the auger barrel outlet.To solve this problem, the whole grain discharge auger outlet barrel Causes another problem that becomes larger.
Further, since the shutter is provided on the screw shaft of the auger spiral, it cannot be easily attached / detached, and there is a problem that maintenance work for grain clogging is troublesome.

[0004]

It is an object of the present invention to improve the certainty of preventing grain leakage, reduce defects in the efficiency of grain discharging work, and facilitate maintenance work.

[0005]

According to the present invention, a grain discharge port 8 which is opened downward is provided at the tip of a grain discharge auger 6 connected to a vertical grain raising device 5 for discharging grains in a grain tank 4. Is provided with a grain discharge auger outlet cylinder 7, and an auger cylinder 11 of the grain discharge auger 6 is provided in the grain discharge auger outlet cylinder 7.
This is a grain discharging device provided with an opening / closing shutter 10 for opening / closing the auger barrel outlet portion 12. The opening / closing shutter 10 closes the auger barrel outlet portion 12 except during discharging work (while moving) to prevent grain leakage. When discharging, the auger spiral outlet 1 is opened to open the auger spiral 1 of the grain discharging auger 6.
The grain in the grain tank is conveyed by 3 and discharged from the grain discharge port 8 of the grain discharge auger outlet cylinder 7. According to the present invention, the opening / closing shutter 10 is formed in a flat plate shape, is fixed to the shutter mounting shaft 15 in a direction intersecting with the conveying direction of the grain discharging auger 6, and the shutter mounting shaft 15 is rotated about the center of the shutter mounting shaft 15 by a drive motor 16. This is a grain discharging device configured to rotate between a closed position that closes a part or all of the auger barrel outlet portion 12 that faces the grain discharge auger outlet barrel 7 and an open position that opens. The open / close shutter 10 rotates upward about the shutter mounting shaft 15 to close the auger tube outlet 12 to prevent grain leakage during other operations (moving). 10
Is rotated downward to open the auger tube outlet portion 12 and discharge from the grain discharge port 8 of the grain discharge auger outlet cylinder 7. In the present invention, the tip of the auger cylinder 11 of the grain discharging auger 6 is connected to the grain discharging auger outlet cylinder 7 by projecting the tip of the auger cylinder 11 inside the grain discharging auger outlet cylinder 7. A grain discharging device in which the shutter mounting shaft 15 is located in the grain discharging device is provided. The grain transported by the auger spiral 13 of the grain discharging auger 6 draws a parabola from the auger barrel outlet 12 to discharge the grain discharging auger. It flows into the cylinder 7, is discharged from the grain discharge port 8 as it is, and the shutter mounting shaft 15 that is the opening / closing drive portion of the opening / closing shutter 10 is located below the parabola and does not interfere with the discharge of grains. The present invention provides a grain discharging device in which an auxiliary leak prevention plate 25 that abuts the opening / closing shutter 10 in the closed position is provided on the lower surface of the tip of the auger cylinder 11, and the opening / closing shutter 10 is used except for discharging work (while moving).
When the shutter is closed, the opening / closing shutter 10 comes into contact with the peripheral edge of the auger cylinder 11 to close the auger cylinder outlet 12, and the auger cylinder 11 is closed.
Even if a gap is formed between the peripheral edge of and the opening / closing shutter 10, the grains that have fallen from the gap are prevented from leaking by the auxiliary leak prevention plate 25, and when the opening / closing shutter 10 is rotated in the opening direction, the grains are discharged. It is dropped toward the outlet 8 and discharged. According to the present invention, the opening / closing shutter 10 has a shape that conforms to the outer shape of the auger cylinder 11 and is closed when the auger cylinder 11 is closed.
The opening / closing shutter 10 is provided as a grain discharging device provided with a fitting concave portion 28 fitted to the periphery of the grain to prevent grain leakage.
Is closed, the fitting recess 28 of the opening / closing shutter 10 is fitted to the peripheral edge of the auger cylinder 11 to close the auger cylinder outlet portion 12, and a gap between the peripheral edge of the auger cylinder 11 and the opening / closing shutter 10 is prevented. To prevent the leakage of grain. According to the present invention, the opening / closing shutter 10 includes the shutter mounting shaft 1
5, and a movable shutter portion 31 that moves between a position at which the auger tube outlet portion 12 is closed and a position at which the auger tube outlet portion 12 is opened with respect to the shutter mounting portion 30. Even if the shutter attachment portion 30 closes the auger tube outlet portion 12, the auger spiral 1
The grain discharging device is configured to open the auger tube outlet 12 when the grain conveying pressure by 3 is applied. Even when the opening / closing shutter 10 cannot be opened,
When the auger spiral 13 of the grain discharging auger 6 is operated to convey the grain, the auger tube outlet portion 12 of the movable shutter portion 31 is opened due to the generation of the predetermined grain conveying pressure, and the grain is It is discharged from the open portion through the grain discharge auger outlet cylinder 7 and the grain discharge port 8. According to the present invention, the opening / closing shutter 10 has a movable shutter portion 31 even when the movable shutter portion 31 is displaced or rotated from the grain conveying pressure with respect to the shutter mounting portion 30 so that the opening / closing shutter 10 cannot be switched to the open state. The grain discharging device is configured to open the auger tube outlet portion 12 of the portion 31. Even when the opening / closing shutter 10 cannot be opened,
A predetermined conveying pressure generated by conveying the grain by operating the auger spiral 13 of the grain discharging auger 6 is movable shutter unit 3
1, the movable shutter unit 31 is the shutter mounting unit 30.
To release the auger tube outlet portion 12 or to rotate with respect to the shutter mounting portion 30 to open the auger tube outlet portion 12, and the grain is discharged from this open portion through the grain discharge auger. It is discharged from the grain discharge port 8 through the outlet cylinder 7.

[0006]

According to the first aspect of the present invention, the grain discharge auger outlet cylinder 7 is provided.
Since the opening / closing shutter 10 is provided inside, the auger tube outlet 12 is closed during movement to prevent grain leakage, and does not interfere when moving the auger tube outlet 12 during discharging work. Losses such as grain zero are reduced and discharge work is facilitated. In the second aspect, in addition to the preceding paragraph, a configuration in which the opening / closing shutter 10 is provided in the grain discharge auger outlet tube 7 can be easily realized, and the cost can be reduced. In claim 3, in addition to the preceding paragraph, during the discharging work, the opening / closing shutter 10 does not interfere with the grain moving from the auger barrel outlet 12 to the grain discharging port 8 of the grain discharging auger outlet barrel 7, and the discharging work Does not reduce work efficiency and work efficiency. In claim 4, in addition to the preceding paragraph,
Improves the certainty of closing the auger tube outlet portion 12, and
The tolerance of manufacturing and assembling can be absorbed, and the manufacturing and assembling can be facilitated. In the fifth aspect, in addition to the preceding paragraph, only the opening / closing shutter 10 needs to be processed, so the configuration can be simplified and the cost can be reduced. According to the sixth aspect, in addition to the preceding paragraph, even when the opening / closing shutter 10 cannot be opened, the auger tube outlet portion 12 can be opened to avoid the discharge operation impossible state. In the seventh aspect, in addition to the preceding paragraph, it is possible to easily realize the configuration for avoiding the discharge work impossible state and reduce the cost.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to the drawings. 1 is a traveling device, 2 is a threshing device provided above the traveling device 1, 3 is a cutting unit provided in front of the threshing device 2, 4 is a grain tank provided on the side of the threshing device 2, 5 is a vertical frying device for discharging the grains in the grain tank 4, 6 is a grain discharging auger in which the base is connected to the vertical frying device 5. , The machine is run and the grain culms in the field are cut by the cutting unit 3 and threshed by the threshing device 2, and the threshed grains are stored in the grain tank 4, and when the grain tank 4 becomes full, the vertical frying device 5 is used. And the fried grain is discharged to the tank of the truck near the field by the grain discharge auger 6. A grain discharge auger outlet cylinder 7 is provided at the tip of the grain discharge auger 6. The grain discharge auger outlet cylinder 7 is formed in a vertical cylinder shape having a downward grain discharge port 8, and the grain discharge auger outlet cylinder 7 stops falling of the grain from the grain discharge port 8 therein. An opening / closing shutter 10 is provided.

That is, by providing the opening / closing shutter 10 in the grain discharge auger outlet cylinder 7, the shutter opened at the grain discharge port 8 need not be exposed, and the grain discharge auger 6 can be operated during the grain discharge work. When moving the tip, it is possible to prevent the occurrence of the problem of contacting and scattering the grains that have already been discharged and become a mountain, and also facilitate the movement operation of the tip of the grain discharging auger 6, Makes the entire discharge work easier. The opening / closing shutter 10 is used for the grain discharge auger outlet cylinder 7.
The auger tube outlet 12 of the auger tube 11 of the grain discharging auger 6 facing inside is provided so as to be opened and closed. 2 and the following examples, the tip of the auger tube 11 of the grain discharging auger 6 is projected into the grain discharging auger outlet tube 7, and the grain discharging auger outlet tube 7 is attached and connected to the tip of the auger tube 11. Then, the auger spiral 13 of the grain discharging auger 6 faces the auger barrel outlet 12, but from the auger barrel outlet 12 the grain discharging auger outlet barrel 7
The opening / closing shutter 10 is formed in a flat plate shape and is fixed to the shutter mounting shaft 15 without being projected inside, and is configured to be conveyed to the auger cylinder outlet 12.
Is rotatably attached to the grain discharge auger outlet cylinder 7 so as to be a direction (transverse direction) intersecting the transportation direction of the grain discharge auger 6, and the shutter mounting shaft 15 is a drive motor 16 which is a part of the opening / closing mechanism 14. Thus, the open / close shutter 10 is forcibly opened / closed by rotating in the normal and reverse directions. A transmission box 17 transmits the rotation of the drive motor 16 to the shutter mounting shaft 15.

Therefore, the opening / closing shutter 10 itself is located in the grain discharge auger outlet cylinder 7, and the drive motor 16 and the transmission box 17 of the opening / closing mechanism 14 for opening / closing the grain discharge auger are located above the grain discharge port 8. It is positioned to facilitate the movement operation of the tip of the grain discharging auger 6. In this case, the shutter mounting shaft 15 is configured so as to be rotated by a manual operation so that it can be opened and closed even when it cannot be opened or closed due to a failure of the drive motor 16 or the like. Thus, as described above, the auger spiral 13 does not project into the grain discharge auger outlet cylinder 7 from the auger cylinder outlet portion 12, but the tip of the spiral rotation shaft 18 of the auger spiral 13 has a grain discharge auger outlet cylinder. It is attached to 7. Therefore,
The opening / closing shutter 10 is shaped or arranged so as not to interfere with the spiral rotation shaft 18 in the closed state. That is, since most of the grains remaining in the auger cylinder 11 after the discharging work are below the spiral rotary shaft 18, if the height (upper end position) of the opening / closing shutter 10 is set to the spiral rotary shaft 18, the spiral rotary shaft 18 will be described. 18 is rotated upward without interfering with 18 and the auger tube outlet 12
Can be prevented from leaking, and at the time of discharging work, the auger tube outlet 12 is located below the lower edge of the auger tube outlet 12 so that the entire surface of the auger tube outlet 12 is opened.

In this case, the auger cylinder 1 of the grain discharging auger 6
The tip of No. 1 is made to project into the grain discharge auger outlet tube 7, and the tip of the auger tube 11 is located on the front side (rear side) of the rear edge 19 of the grain discharge auger outlet tube 7 in a side view. 1
When the shutter mounting shaft 15 is positioned in the space 20 below between the lower end of the auger cylinder 11 and the lower end of the auger cylinder 11 (the lower edge of the auger cylinder outlet 12), when the opening / closing shutter 10 is opened,
The shutter mounting shaft 15 and the open / close shutter 10 in the open state can be located at a position outside the flow path of the grain from the auger barrel outlet 12 to the grain discharge auger outlet barrel 7, thereby affecting the grain discharge. No, it is preferable. That is, since the grains discharged from the auger barrel outlet 12 are transported by the auger spiral 13, the grains were transported not by gravity gravity immediately upon entering the grain discharging auger outlet barrel 7, but were transported. Due to the inertia of time, a parabola is drawn to some extent and enters the grain discharge auger outlet cylinder 7. Therefore, when the shutter mounting shaft 15 and the open / close shutter 10 in the open state are positioned at a position that is a shadow (lower side) of this parabola, Does not affect grain discharge. Two
Reference numeral 1 is a harness of the drive motor 16, and 22 is a coupler.

The opening / closing shutter 10 is opened when the grain discharging work lever (not shown) for operating the grain discharging auger 6 is discharged, and the auger tube outlet 12 is closed when the discharging is stopped. If they are connected in a linked manner, the operability is improved, which is preferable. Then, the space 20
The opening / closing shutter 10 is provided on the lower surface of the tip of the auger cylinder 11 facing the
An auxiliary leak prevention plate 25 that comes into contact with is provided (FIGS. 4 to 6). The auxiliary leak prevention plate 25 is the auger tube outlet portion 1 of the circular auger tube 11 located in the grain discharge auger outlet tube 7.
It is provided along the lower peripheral edge of 2, and the mounting plate portion 26 and the contact plate portion 27 form an inverted L-shaped cross section.
Even if a gap is created between the auxiliary leak prevention plate 25 and the auger tube outlet portion 12 by the opening / closing shutter 10 due to a variation in manufacturing attachment, the grain falling from the gap is received by the upper surface of the mounting plate portion 26, and the grain is dropped. Prevent leaks.
Therefore, it is possible to loosen the setting of the tolerance in manufacturing and mounting, which facilitates all the operations for manufacturing, assembling and mounting, and reduces the cost. Further, in the embodiment shown in FIGS. 7 to 10, the auxiliary leakage prevention plate 25 is fixed to the opening / closing shutter 10.

In the embodiment shown in FIGS. 11 and 12, the opening / closing shutter 10 has an arcuate shape corresponding to the outer shape of the auger cylinder 11 (auger cylinder outlet 12).
When the opening / closing shutter 10 is closed by providing the fitting concave portion 28 fitted to the peripheral edge of the first opening 1, the fitting concave portion 28 fits in the auger tube 11 at the peripheral edge of the auger tube outlet portion 12, and A gap is prevented from being formed between the auger tube outlet portion 12 and a grain leak. Further, in the embodiment of FIGS. 13 to 18, the auger tube outlet portion 1 of the opening / closing shutter 10 is used.
An elastic contact member 29 made of urethane, rubber, or the like is provided on the second side, and the elastic contact member 29 is brought into contact with the auger cylinder 11 at the peripheral edge of the auger cylinder outlet portion 12, and the elastic contact member 29 at the contact portion is contacted.
Is deformed to have the same effect as the fitting recess 28 and prevents a gap from being formed between the opening / closing shutter 10 and the auger tube outlet 12, thereby preventing grain leakage. Thus, the opening / closing shutter 10 is movable between a shutter mounting portion 30 mounted on the shutter mounting shaft 15 and a position for closing or opening the auger tube outlet portion 12 with respect to the shutter mounting portion 30. The movable shutter portion 31 is divided into upper and lower parts, and the movable shutter portion 31 has the auger spiral 13 even when the shutter mounting portion 30 closes the auger tube outlet portion 12.
The auger tube outlet 12 is opened when the grain conveying pressure is applied.

That is, the movable shutter portion 31 is rotated downward with the shutter mounting portion 30 left open to open the auger tube outlet portion 12. In the embodiment of FIGS. 19 and 20, the shutter mounting portion 30
Is formed of a metal plate, the movable shutter portion 31 is formed of synthetic resin, the movable shutter portion 31 is attached by a fastener 33 such as a rivet, and even when the movable shutter portion 31 cannot switch the open / close shutter 10 to the open state. When the auger spiral 13 is operated, the auger tube outlet 12 in the movable shutter portion 31 is opened by being detached from the shutter mounting portion 30 by the grain conveying pressure. In addition, FIG.
In this embodiment, the end of the shutter mounting shaft 15 to which the opening / closing shutter 10 is fixed is made to project from the grain discharge auger outlet cylinder 7, and the end of the shutter mounting shaft 15 and the transmission box 17 are provided.
A rotation transmitting member 35 is provided between the output shafts 34 of the shutter mounting shaft 1 and the rotation transmitting member 35 normally applies the force of the drive motor 16 to the shutter mounting shaft 1.
5 to rotate the opening / closing shutter 10 to rotate the shutter mounting shaft 15 and load the output shaft 3
The shutter mounting shaft 15 is rotated without rotating 4.

That is, even when the drive motor 16 fails, when the auger spiral 13 is operated, the opening / closing shutter 10 is rotated by the grain conveying pressure, and the shutter mounting shaft 15 is slip-rotated with respect to the rotation transmitting member 35. It does not interfere with the open rotation of the opening / closing shutter 10. The rotation transmission member 35
Is formed of a spring member, transmits the rotation of the drive motor 16 by the tightening torque of the rotation transmission member 35, and causes a slip rotation when a force larger than the torque is applied. In the embodiment shown in FIGS. 22 and 23, the movable shutter portion 31 is rotatably attached to the shutter attachment portion 30 and is integrally rotated by the spring 32 when the opening / closing shutter 10 is normally opened and closed. The spring 32 is set weaker than the grain conveying pressure, and even when the open / close shutter 10 cannot be switched to the open state, when the auger spiral 13 is operated, the movable shutter portion 31 is rotated against the spring 32 by the grain conveying pressure. The auger tube outlet portion 1 of the movable shutter portion 31
Open 2. In this case, in the open / close shutter 10, the shutter mounting portion 30 is provided in a fixed state, the movable shutter portion 31 is rotatably mounted on the shutter mounting portion 30, and the spring 32 constantly urges the shutter mounting portion 30 in the closing direction to provide the auger tube outlet portion. 12
The spring 32 is set to be weaker than the grain conveying pressure, and the auger tube outlet 12 of the movable shutter portion 31 is provided only when the auger spiral 13 is operated to discharge the grain.
And the upper end of the shutter mounting portion 30 is set at a height such that residual rice remaining between the lower edge of the auger spiral 13 and the inner circumference of the auger cylinder 11 does not build up to prevent grain leakage. To prevent. Therefore, after the final work or at the time of maintenance, the shutter mounting shaft 15 is rotated to open the opening / closing shutter 10 together with the shutter mounting portion 30 to discharge the residual grain.

[Brief description of drawings]

FIG. 1 is a side view of a combine.

FIG. 2 is a vertical sectional side view of a grain discharge auger outlet tube portion.

FIG. 3 is a front view of the same.

FIG. 4 is a vertical sectional side view of an embodiment provided with an auxiliary leak prevention plate.

FIG. 5 is a side view of the same.

FIG. 6 is a front view of the same.

FIG. 7 is a vertical cross-sectional side view of another embodiment of the auxiliary leakage prevention plate during opening and closing.

FIG. 8 is a front view of the same.

FIG. 9 is a vertical sectional side view of the same open state.

FIG. 10 is a front view of the same open state.

FIG. 11 is a vertical sectional side view of another embodiment.

FIG. 12 is a front view of the same.

FIG. 13 is a vertical sectional side view of another embodiment in a closed state.

FIG. 14 is a front view of the same.

FIG. 15 is a vertical cross-sectional side view in the middle of opening and closing the same.

FIG. 16 is a front view of the same.

FIG. 17 is a vertical sectional side view of the same closed state.

FIG. 18 is a front view of the same.

FIG. 19 is a front view of another embodiment in a closed state.

FIG. 20 is a side view of the same.

FIG. 21 is a front view of another embodiment.

FIG. 22 is a front view of another embodiment.

FIG. 23 is a side view of the same.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Traveling device, 2 ... Threshing device, 3 ... Mowing part, 4 ... Glen tank, 5 ... Vertical graining device, 6 ... Grain discharge auger, 7 ... Grain discharge auger outlet cylinder, 8 ... Grain discharge port, 10 ... Opening / closing shutter, 11 ... Auger tube, 12 ... Auger tube outlet, 13 ...
Auger spiral, 15 ... Shutter mounting shaft, 16 ... Drive motor, 17 ... Transmission box, 18 ... Spiral rotation shaft, 19 ... Trailing edge, 20 ... Space, 21 ... Harness, 22 ... Coupler, 25
... Auxiliary leak prevention plate, 26 ... Horizontal plate part, 27 ... Abutment plate part, 2
8 ... Fitting concave part, 29 ... Elastic contact member, 30 ... Shutter mounting part, 31 ... Movable shutter part, 32 ... Spring, 33 ... Fastener, 34 ... Output shaft, 35 ... Rotation transmission member.

Continued front page    F term (reference) 2B396 JA04 JC07 KE03 LA03 LE18                       LG02 LG16 LR02 LR08 LR13                       MA02 MA07 MC02 MC07 MC13

Claims (7)

[Claims] 1. A grain discharge having a grain discharge port 8 opening downward at the tip of an auger cylinder 11 of a grain discharge auger 6 connected to a vertical grain raising device 5 for discharging grains in a grain tank 4. A grain discharging device provided with an auger outlet tube 7, and an opening / closing shutter 10 for opening and closing an auger tube outlet portion 12 of the auger tube 11 in the grain discharging auger outlet tube 7. 2. The opening / closing shutter 1 according to claim 1.
0 is formed in a flat plate shape and is fixed to a shutter mounting shaft 15 that intersects with the conveying direction of the grain discharging auger 6, and the grain discharging auger outlet is located at the center of the shutter mounting shaft 15 that rotates in the forward and reverse directions by a drive motor 16. The auger tube outlet 12 that faces the tube 7
A grain discharging device configured to rotate between a closed position that closes part or all of the above and an open position that opens. 3. The auger cylinder 11 in the grain discharge auger outlet cylinder 7 according to claim 1 or 2, wherein a tip of the auger cylinder 11 is connected so as to project into the grain discharge auger outlet cylinder 7. The grain discharging device in which the shutter mounting shaft 15 is positioned on the lower surface on the tip side of the. 4. The grain discharging device according to claim 3, wherein an auxiliary leak prevention plate 25 is provided on the lower surface of the tip of the auger cylinder 11 so as to come into contact with the open / close shutter 10 in the closed position. 5. The opening / closing shutter 1 according to claim 3.
No. 0 is a grain discharging device having a fitting concave portion 28 having a shape adapted to the outer shape of the auger cylinder 11 and fitted to the peripheral edge of the auger cylinder 11 when closed to prevent grain leakage. 6. The opening / closing shutter 10 according to any one of claims 1 to 5, wherein:
Shutter attaching part 30 attached to the
0 is divided into a movable shutter portion 31 that moves between a position where the auger tube outlet portion 12 is closed and a position where the auger tube outlet portion 12 is opened, and the movable shutter portion 31 has a shutter mounting portion 30 that closes the auger tube outlet portion 12. Auger spiral 13
The grain discharging device configured to open the auger tube outlet portion 12 when the grain conveying pressure is applied. 7. The opening / closing shutter 1 according to claim 6.
0 is an auger cylinder of the movable shutter portion 31 even when the movable shutter portion 31 is displaced from the grain conveying pressure with respect to the shutter mounting portion 30 or rotated and the open / close shutter 10 cannot be switched to the open state. A grain discharging device configured to open the outlet portion 12.