JP5443879B2 - Grain discharger - Google Patents

Description

  The present invention relates to a grain discharging device that provides a conveying means for conveying a grain from a grain tank toward a grain outlet and prevents a grain leakage from the grain outlet.

  In the conventional grain discharging device, the grain outlet is open when the harvested grain is discharged from the grain tank, but there is no problem in the movement, etc. The grain that is being used may be wasted. For the purpose of preventing this, a discharge switching member is provided in the grain discharge port of the grain discharge device so as to be swingably switchable, and a transfer means such as a rotation of a transfer screw of the grain tank and the grain discharge device is provided. When the grain is discharged from the grain outlet by operating, the discharge switching member opens to open the grain outlet to allow the grain to be discharged, to stop the conveying means and to discharge the grain. Is stopped, the discharge switching member is closed and the grain outlet is closed to prevent the grain from being discharged (see FIG. 3 of Patent Document 1 and FIG. 3 of Patent Document 2).

JP-A-10-75643 JP 2008-54650 A

  In the above configuration, when the discharge switching member is swung to the closed side of the grain outlet, the end of the discharge switching member contacts the receiving part of the discharge switching member or the inner surface of the duct constituting the grain outlet ( Line contact) and the grain outlet was closed. Therefore, if the end of the discharge switching member is elastically bent downward even under the influence of the weight of the grain and the like while the discharge switching member is closed and the grain discharge port is closed, the grain discharge There is a possibility that a gap is generated between the outlet and the discharge switching member, and that the grain may leak from the gap each time.

  An object of the present invention is to provide a grain discharging device that prevents a grain leakage by making it difficult for a gap to be formed between the grain outlet and the discharging switching member even if the position of the discharging switching member is bent downward slightly. There is in point to do.

〔Constitution〕
Characterizing feature of the invention according to claim 1, when provided with a conveying device for conveying the grain from the grain tank toward the grain discharge port together, the discharge switching member for preventing grain leakage into the grain outlet The provided grain discharging apparatus, wherein the discharge switching member opens the grain outlet and allows the grain to be discharged from the grain outlet. It is possible to swing and switch to a discharge prevention posture that closes the grain outlet and prevents the grain from being discharged from the grain outlet, the inner surface of the grain outlet and the discharge switching. A surface portion is provided at an end portion of the member so that the surface portion of the grain discharge port and the surface portion of the discharge switching member are in surface contact with each other in the discharge prevention posture to prevent the discharge of the grain from the grain discharge port. configured tare on is, the a recess in the inner surface of the grain outlet, said concave As surface of the upper portion the grain discharge port of the inner surface of the point Ru configured tear to surface contact from the lower side surface portion of the surface of the discharge switching member in the discharge blocking position said grain discharge port There are the following effects.

[Action]
According to the characteristic configuration of the invention according to claim 1, the discharge switching member is swingable, and has a downward discharge allowance posture that opens the grain discharge port and allows the discharge of the grain from the grain discharge port. The grain discharge port is closed above the discharge posture, and is switched to the discharge prevention posture that blocks the discharge of the grain from the grain discharge port. When the discharge switching member changes from the downward discharge allowance posture to the upward discharge prevention posture, the surface portion of the discharge switching member comes into surface contact with the surface portion of the inner surface of the grain discharge port to close the grain discharge port. Therefore, even if the end portion of the discharge switching member is elastically bent, it is in a state where a portion that does not partially contact within the range of surface contact is generated. That is, the contact portion between the inner surface of the grain discharge port and the discharge switching member is secured, and a gap is hardly generated between the inner surface of the grain discharge port and the discharge switching member. Is prevented.

〔effect〕
According to the characteristic configuration of the invention according to claim 1, the surface portion is provided on the inner surface of the grain discharge port and the end of the discharge switching member, and the surface portion of the grain discharge port and the surface portion of the discharge switching member are in surface contact in the discharge prevention posture. Since the discharge of the grain from the grain outlet is prevented, the closed state of the grain outlet is maintained in the discharge prevention posture of the discharge switching member, and the leakage of the grain can be reliably prevented, and the grain is prevented. Less wasted.

Further , according to the characteristic configuration of the invention according to claim 1 , when the discharge switching member is switched to the discharge prevention posture, the discharge switching member swings and rotates upward, and the surface portion of the discharge switching member is the recess of the grain discharge port. Surface contact is made on the upper part (surface part) from below. At that time, if the end portion of the discharge switching member is elastically bent downward due to vibration or the weight of the grain, the surface portion of the discharge switching member may be separated from the upper portion (surface portion) of the concave portion of the grain discharge port. However, when the downward deflection of the discharge switching member is small, the surface portion of the discharge switching member overlaps the surface portion of the inner surface of the grain discharge port in a plan view, and a state in which no gap is generated is maintained. Grain leakage is prevented.

  In Patent Document 2, when the discharge prevention posture is set, as shown in FIG. 3A of Patent Document 2, when the duct inner surface and the discharge switching member come into contact with each other, the tip of the discharge switching member and the duct inner surface In some cases, this may cause twisting, and it is particularly difficult to operate the discharge switching member from the discharge prevention posture to the discharge allowable posture. This seems to be because the inner surface of the duct and the tip of the discharge switching member intersect (perpendicularly).

However, according to the characteristic configuration of the invention according to claim 1 , the surface portion of the discharge switching member comes into surface contact with the surface portion of the duct, and the both surface portions come into surface contact in a parallel state. .

〔effect〕
According to the characteristic configuration of the invention according to claim 1 , the concave portion is formed on the inner surface of the grain discharge port, and the upper portion of the inner surface of the concave portion is used as the surface portion of the grain discharge port, and the surface portion of the discharge switching member is in the discharge prevention posture. Since it is configured so as to make surface contact with the surface portion of the grain outlet from the lower side, the leakage of the grain is surely prevented and the operability of the grain discharging operation by the discharge switching member is improved.
Further, when the discharge switching member swings downward, it does not rub against the inner surface of the grain discharge port (because it is difficult to cause twisting), so that the discharge switching member can be switched between the discharge prevention posture and the discharge allowable posture. Can be performed smoothly.

〔Constitution〕
Characterizing feature of the invention according to claim 2 is the invention according to claim 1, the end face portion of the discharge switching member, wherein the surface of the grain discharge opening provided with a projecting portion facing the opposite lower At some point, the effects are as follows.

[Function and effect]
According to the characteristic configuration of the invention according to claim 2, when a recess is formed on the inner surface of the grain discharge port, the lower side opposite to the surface portion of the grain discharge port is provided at the end of the surface portion of the discharge switching member. When the discharge switching member is switched to the discharge prevention posture, the lower portion of the inner surface of the concave portion of the grain discharge port and the protrusion of the discharge switching member face each other. In this case, there is a narrow portion (a portion of the protruding portion of the discharge switching member) having a narrow gap between the discharge switching member and the inner surface of the grain outlet, which is different from the portion where the surface portions are in surface contact with each other. Thus, the sealing performance in the discharge prevention posture is further improved. Therefore, even if the bent little end in a downward discharge switching member, the sealing property is maintained by the discharge switching member of the discharge blocking position, Ru can more reliably prevent the leakage of grain.

Combine side view Overall plan view of combine Combine front view Side view of the vicinity of the auger outlet (Discharge permissible posture of the discharge switching member) Side view of the vicinity of the auger outlet (Discharge prevention posture of the discharge switching member) (A) VIa-VIa sectional view of FIG. 4, (b) VIb-VIb sectional view of FIG. (A) VIIa-VIIa sectional view of FIG. 4, (a) VIIb-VIIb sectional view of FIG. Power transmission diagram Arrangement of counter case and compressor XX sectional view of FIG. XI-XI sectional view of FIG. Expand the dynamic construction of the discharge switching member

  Embodiments of the present invention will be described below with reference to the drawings.

[1]
FIG. 1 is a side view of a combine equipped with a grain discharge auger according to an embodiment of the present invention. FIG. 2 is a plan view of the combine equipped with the grain discharge auger according to the embodiment of the present invention. As shown in these drawings, the combine is configured to be self-propelled by a pair of left and right crawler type traveling devices 1 and 1, and is provided below the driving cabin 2 having the driving seat 2A and the driving seat 2A. A self-propelled airframe equipped with a prime mover having an engine E, a cutting part 4 connected to the front part of the airframe frame 3 of the self-propelled airframe, and a self-propelled airframe on the rear side of the airframe frame 3 A threshing device 5 and a grain tank 6 provided side by side are provided, and a grain discharging device 8 having a vertical grain discharging auger 7 provided on the rear side of the grain tank 6 in the vertical direction is provided. ing.

This combine harvests rice and wheat.
That is, in the cutting unit 4, the cutting unit frame 4 a is vertically swung with respect to the body frame 3 by the lifting cylinder 9, so that the weeding tool 4 b located at the front end of the cutting unit 4 is lowered near the farm field. Are moved up and down, and the ascending work state in which the weeding tool 4b is raised from the field is raised and lowered. When the mowing unit 4 is in a descending work state and the self-propelled machine body is caused to travel, the mowing unit 4 is driven by the driving force from the engine E to mow while raising the planted culm. The threshing device 5 is driven by the driving force from the engine E and threshs the harvested cereal meal from the harvesting unit 4. The grain tank 6 collects and stores the threshed grains from the threshing device 5.

[2]
The grain discharge device 8 includes the vertical grain discharge auger 7 (hereinafter, abbreviated as the vertical auger 7), and the conveyance start end side is connected to the conveyance end side of the vertical auger 7 via the upper relay case 10. A horizontal grain discharge auger 11 (hereinafter abbreviated as a horizontal auger 11) is provided. In the combine, an auger receiver 75 for storing the horizontal auger 11 is provided on the upper portion of the threshing device 5.

  The transport cylinder 11b of the horizontal auger 11 is provided with a base-end-side transport cylinder 20 having a circular cross section in which the transport upstream end is connected to the upper relay case 10, and a rectangular tube-shaped discharge cylinder 15 provided at the transport downstream end. The front end side transport cylinder 21 having a circular cross section is provided. Here, the discharge cylinder 15 corresponds to the grain outlet in the grain discharging device 8 of the present invention.

  The front end side transport cylinder 21 is supported by the base end side transport cylinder 20 so as to be freely extended and contracted in a state of being fitted on the base end side transport cylinder 20. The conveying screw 11 a of the horizontal auger 11 is internally provided across the proximal end side conveying cylinder 20 and the distal end side conveying cylinder 21. The transport screw 11a includes a transport upstream screw part 30 located on the transport upstream side and a transport downstream screw part 40 located on the transport downstream side. Therefore, when discharging the grain from the discharge tube 15 of the horizontal auger 11, the front end side transfer tube 21 can be extended as shown in FIG.

  The conveyance start end side of the vertical auger 7 is connected to the bottom discharge screw 12 located in the bottom of the grain tank 6 via the lower relay case 13. The transport screw 7 a of the vertical auger 7 is interlocked with the bottom discharge screw 12 by an interlocking mechanism 13 a having a bevel gear located inside the lower relay case 13, and the transport screw 11 a of the horizontal auger 11 is placed inside the upper relay case 10. It is interlocked with the conveying screw 7a of the vertical auger 7 through the interlocking mechanism 14 that is positioned.

  The grain discharging device 8 discharges the grains stored in the grain tank 6 when a discharge clutch 12a (see FIG. 1) for turning on and off the transmission from the engine E to the bottom discharge screw 12 is turned on and operated. . The discharge clutch 12a is turned on and off by an electric motor (not shown). When the discharge clutch 12a is engaged and operated, the bottom discharge screw 12 is driven and the conveying screw 7a of the vertical auger 7 is driven by the driving force of the bottom discharging screw 12. The horizontal auger 11 is driven by the driving force of the conveying screw 7a. The transport screw 11a is driven. The grain discharged from the grain tank 6 by the bottom discharge screw 12 and sent to the lower relay case 13 is lifted by the vertical auger 7 and sent to the upper relay case 10. It is laterally fed by the auger 11 and discharged from the discharge cylinder 15 provided at the tip of the transport cylinder 11b of the horizontal auger 11. At this time, the grain discharge location can be illuminated by a work lamp 16 (see FIGS. 1 and 4) provided outside the discharge cylinder 15.

  The grain discharging device 8 includes a turning operation mechanism 17 (see FIGS. 1 and 2) provided across the conveying cylinder 7b of the vertical auger 7 and the lower relay case 13, a cylinder bracket 19a included in the conveying cylinder 7b of the vertical auger 7. A lifting cylinder 19 (see FIGS. 1 and 2) connected to a connecting shaft 18 included in the transport cylinder 11b of the horizontal auger 11 is provided. A swing motor 17a included in the swing operation mechanism 17 is driven, and the lift cylinder 19 is driven. By changing the grain discharge location.

  That is, when the turning motor 17a is driven, the vertical auger 7 is turned with respect to the lower relay case 13 by the turning operation mechanism 17 driven by the turning motor 17a, and the horizontal auger 11 is turned together with the vertical auger 7. The discharge cylinder 15 pivots around the pivot axis of the vertical auger 7.

  When the lifting cylinder 19 is driven, the horizontal auger 11 is swung up and down with respect to the vertical auger 7 by the driving force of the lifting cylinder 19, and the discharge cylinder 15 is moved up and down around the swing axis of the horizontal auger 11. To do.

[3]
The discharge switching member 90 will be described.
As shown in FIG. 4, the front end side conveyance cylinder 21 includes a discharge switching member 90 provided inside the discharge cylinder 15. The discharge switching member 90 is supported so as to be swingable and openable about the axis of the lateral support shaft 91. An electric motor 92 (hereinafter referred to as an opening / closing motor 92) is provided outside the discharge cylinder 15, and the opening / closing motor 92 is interposed via a speed reducer 94 on the vertical wall portion 15 a on the upper transport side of the removable discharge cylinder 15. It is supported. A substantially semicircular cam plate 93 having an arcuate cam surface 93a is attached to the output shaft 94a of the speed reducer 94. The discharge switching member 90 is switched between a discharge allowance posture and a discharge prevention posture by a rotation operation of the cam plate 93.

  As shown in FIGS. 4 and 5, the inner surface of the vertical wall portion 15 b facing the vertical wall portion 15 a of the discharge cylinder 15 is continuously provided with a concave portion 50 that is recessed outward from the inner surface of the discharge cylinder 15. Is formed. The recess 50 includes an upper portion 51 and a lower portion 52, and the upper portion 51 is a surface portion that is in surface contact with the surface portion 90 a of the end portion of the discharge switching member 90. In addition, the recessed part 50 is formed in the position lower than the height of the line | wire which connects the spindle 91 and the vertical wall part 15b in a horizontal direction.

  4, 6 </ b> A, and 7 </ b> A show the discharge allowable posture of the discharge switching member 90. As shown in these drawings, when the position of the cam surface 93a is located below the output shaft 94a by the rotation of the opening / closing motor 92, the discharge switching member 90 swings downward due to its own weight and assumes a discharge allowable posture. The discharge switching member 90 in the discharge allowable posture switches the discharge cylinder 15 to the open state, and forms a discharge path 97 inside the discharge cylinder 15. The discharge path 97 communicates with the grain outlet 21 a of the front end side conveyance cylinder 21, and discharges the grain conveyed to the grain outlet 21 a of the front end side conveyance cylinder 21 from the discharge cylinder 15.

  5, FIG. 6B and FIG. 7B show the discharge prevention posture of the discharge switching member 90. FIG. As shown in these drawings, when the cam surface 93a is positioned above the output shaft 94a by the rotation of the opening / closing motor 92, the cam plate is interposed between the bent portion 90b of the discharge switching member 90 and the support shaft 91, which will be described later. When 93 (cam surface 93a) comes into contact, the discharge switching member 90 is gradually pushed up by the cam surface 93a and finally assumes a discharge prevention posture. The discharge switching member 90 in the discharge blocking posture switches the discharge cylinder 15 to the closed state and forms a storage chamber 98 inside the discharge cylinder 15. The storage chamber 98 stores the grains conveyed by the downstream screw unit 40 so as not to exit the discharge cylinder 15.

  A power stop limit switch 35 is fixed below the discharge cylinder 15. While the grain is being discharged from the horizontal auger 11 to the loading platform of the truck (not shown), if the loading platform is full of grains, the loading platform kernel reaches the discharging cylinder 15 and the grain is discharged to the discharging cylinder 15. And the power stop limit switch 35 is pushed by the grains packed in the discharge cylinder 15. If it becomes so, the discharge clutch 12a will be in a cut | disconnection state, the drive of the conveying screws 12, 7a, and 11a will be stopped, and it is comprised so that discharge of a grain may be stopped automatically.

  A potentiometer 95 is provided outside the discharge cylinder 15, and a pin 96 a is formed at the end of an arm 96 connected to the potentiometer 95. The pin 96 a is always urged against the cam plate 93 to maintain a contact state. . Thus, the position of the pin 96a following the rotational movement of the cam plate 93 is detected by the potentiometer 95, and it is detected whether the discharge switching member 90 is in the discharge prevention posture or the discharge allowable posture. When the potentiometer 95 detects either the discharge prevention posture or the discharge allowable posture of the discharge switching member 90, the opening / closing motor 92 stops, the position of the cam plate 93 is maintained, and the posture of the discharge switching member 90 is maintained. .

  As shown in FIG. 12, when the discharge switching member 90 is in the discharge blocking posture, the end of the discharge switching member 90 is inserted into the concave portion 50 from below, and the end portion of the surface portion 90 a of the discharge switching member 90 and the concave portion 50 The upper surface portion 51 is in surface contact. When the surface portion 90a of the end portion of the discharge switching member 90 and the upper surface portion 51 of the recess 50 are in surface contact, the end portion of the discharge switching member 90 is elastically bent downward due to the influence of grains and the like. Even so, the closed state of the grain outlet is maintained by the mutual face portions 90a, 51, and the grain discharge is reliably prevented.

  The discharge switching member 90 has a flat plate shape as a whole, but has a "<" shape in a side view and has a bent portion 90b. In the discharge prevention posture of the discharge switching member 90, the bent portion 90b of the discharge switching member 90 is slightly elastically deformed so that the surface portion 90a is pressed and urged against the surface portion 51 of the concave portion 50 on the inner surface of the discharge cylinder 15. The position of the cam plate 93 in the discharge prevention posture is set. Since the discharge switching member 90 is bent in a “<” shape, the discharge switching member 90 is hardly deformed in the direction along the bent portion 90 b.

  Further, as shown in FIGS. 4 and 5, the discharge switching member 90 is provided with a projecting portion 90 c that turns back an end portion continuous with the surface portion 90 a and faces downward on the opposite side to the surface portion 51 of the recessed portion 50. . The protruding portion 90c reinforces the end portion (surface portion 90a) of the discharge switching member 90, and the inner surface of the discharge cylinder 15 when the end portion of the discharge switching member 90 in the discharge prevention posture (FIG. 5) is slightly bent downward. It moves so that the lower part 52 of the recessed part 50 may follow, and the space | interval of the edge part of the discharge switching member 90 and the discharge cylinder 15 is hold | maintained. In this case, a portion having a narrow gap (discharge switching member) between the discharge switching member 90 and the inner surface of the discharge cylinder 15, which is different from a portion where the surface portion 90 a of the discharge switching member 90 and the upper surface portion 51 of the recess 50 are in surface contact. The portion of the projecting portion 90c of 90) exists over a wide range, and the sealing performance in the discharge prevention posture is further improved. Therefore, even if the end portion of the discharge switching member 90 is slightly bent downward, the sealing property by the discharge switching member 90 in the discharge blocking posture is maintained, and the leakage of the grains can be more reliably prevented.

[4]
Next, a power transmission system to the bottom discharge screw 12 of the grain tank 6 will be described.
As shown in FIGS. 8 to 11, a counter case 60 is disposed in a space between the bottom of the grain tank 6 and the threshing device 5, and the power of the engine E is transmitted via a transmission belt 61 to the counter. It is transmitted to the input pulley 60a of the case 60. The power of the input pulley 60a is transmitted to the bottom discharge screw 12 via the transmission shaft 62, bevel gears 62a and 63a, the transmission shaft 63, the output pulley 63b, and the discharge clutch 12a. In addition, an air conditioner (not shown) for air conditioning of the operation cabin 2 is provided inside the ceiling portion 2B, and the compressor 66 for the air conditioner is disposed near the counter case 60. The power of the transmission shaft 62 of the counter case 60 is also transmitted to the compressor 66 via the output pulley 62b, the transmission belt 65, and the input pulley 66a of the compressor 66.

  Here, as shown in FIGS. 9 to 11, the counter case 60 and the compressor 66 are provided on the base 70 attached to the body frame 3. The counter case 60 is directly fixed on the base 70. An inverted L-shaped bracket 71 extends upward on the base 70, a bracket 72 extends laterally, and a compressor 66 is fixed to the bracket 71 and the bracket 72. Thus, the counter case 60 and the compressor 66 are unitized by the base 70 to facilitate the assembly to the body frame 3.

[5]
Next, a state in which the grains are discharged from the discharge tube 15 of the horizontal auger 11 to the truck bed will be described. A grain discharge switch (not shown) is provided near the driver's seat 2 </ b> A in the driving cabin 2. The grain discharge switch is a switch for discharging the grain from the grain tank 6, and is switched to the discharge position and the stop position.

  In a state where the grain is discharged from the discharge tube 15 of the horizontal auger 11 to the truck bed, generally, the grain starts to be discharged to the truck bed, and when the truck bed is full, the grain discharge is stopped. By moving the horizontal auger 11 (or by moving the truck), the grain is discharged to the loading platform of the next truck.

  When the grain discharge switch is set to the discharge position, the cam surface 93a of the cam plate 93 moves to a position where it does not act on the discharge switching member 90, and the discharge switching member 90 is switched to the discharge allowable posture (FIG. 4). When the potentiometer 96 detects the discharge allowable posture of the discharge switching member 90, the rotation of the cam plate 93 is stopped, and the discharge clutch 12a is engaged and operated. Conversely, when the grain discharge switch is set to the stop position, the discharge switching member 90 is maintained in the discharge permissible posture only by turning the discharge clutch 12a. When the grain discharge switch is set to the stop position and the horizontal auger 11 is returned onto the auger receiver 75, the cam surface 93a of the cam plate 93 moves to a position where it acts most on the discharge switching member 90, and the discharge switching member. 90 is switched to the discharge prevention posture (FIGS. 5 and 12).

  When the grain discharge switch is operated to the discharge position in a state where the discharge cylinder 15 of the horizontal auger 11 is moved to a position above the truck bed, first, the discharge switching member 90 in the discharge prevention posture swings to the discharge allowable posture. It is switched (FIG. 4). Thereafter, the discharge clutch 12a is engaged and operated, the power of the engine E is transmitted to the bottom discharge screw 12, and the bottom discharge screw 12, the conveyance screw 7a of the vertical auger 7, and the conveyance screw 11a of the horizontal auger 11 are rotationally driven. . Thus, the grain in the grain tank 6 is conveyed and discharged from the discharge tube 15 of the horizontal auger 11.

[6]
In the state of [5] above, when the loading platform of the truck is full, if the grain discharge switch is operated to the stop position, the discharge clutch 12a is operated to the disengaged state, and the bottom discharge screw 12 and the vertical auger 7 The conveyance screw 7a and the conveyance screw 11a of the horizontal auger 11 are stopped. As a result, the grain discharge from the discharge cylinder 15 of the horizontal auger 11 to the truck bed is stopped, but the discharge switching member 90 maintains the discharge allowable posture.

  After that, when the discharge cylinder 15 of the horizontal auger 11 is moved to a position above the loading platform of another truck and the grain discharge switch is operated to the discharge position, the discharge clutch 12a is operated to enter the transfer screw 12, 7a, 11a is driven, and the grain is discharged from the grain tank 6 and discharged from the discharge tube 15 of the horizontal auger 11 to the loading platform of the next truck.

  When the grain discharging operation is completed and the grain discharging switch is operated to the stop position to disengage the discharging clutch 12a and the horizontal auger 11 is returned to the auger receiver 75, the discharging switching member 90 is moved as described above. Switch to the discharge prevention posture. When the discharge switching member 90 is in the discharge blocking posture, the surface portion 90a of the discharge switching member 90 and the surface portion 51 of the discharge cylinder 15 are in surface contact with each other, and the closed state of the discharge cylinder 15 by the discharge switching member 90 is maintained (FIG. 5). FIG. 12). In this way, wasteful discharge of the grains remaining in the storage chamber 98 in the discharge cylinder 15 is prevented when the combine is moved or harvested thereafter.

[Another embodiment]
( 1 ) The discharge switching member 90 may be swingably supported by a vertical wall portion located on both sides of the vertical wall portion 15a or a vertical wall portion 15b facing the vertical wall portion 15a. In this case, a concave portion 50 or the like is formed in the vertical wall portion facing the vertical wall portion that supports the discharge switching member 90 in a swingable manner, and a surface portion that is in surface contact with the surface portion 90 a of the discharge switching member 90 is configured.

  The grain discharging apparatus according to the present invention can be used not only in a self-removing combine but also in an ordinary combine.

6 Grain tank 8 Grain discharging device 11 Horizontal auger 12, 7a, 11a Conveying screw (conveying device)
15 Discharge tube (grain outlet)
50 concave portion 51 surface portion 90 discharge switching member 90a surface portion 90c protruding portion

Claims (2)

A grain discharging device provided with a transport device for transporting the grain from the grain tank toward the grain outlet, and provided with a discharge switching member for preventing grain leakage at the grain outlet,
The discharge switching member opens the grain outlet and allows the grain to be discharged from the grain outlet. It is swingably switchable to a discharge prevention posture that closes and prevents the discharge of the grain from the grain discharge port,
A surface portion is provided on an inner surface of the grain discharge port and an end portion of the discharge switching member, and the surface portion of the grain discharge port and the surface portion of the discharge switching member are in surface contact with each other in the discharge prevention posture. Configured to prevent the grain from exiting,
A concave portion is formed on the inner surface of the grain outlet, and the upper portion of the inner surface of the concave portion is used as a surface portion of the grain outlet.
The grain discharging apparatus comprised so that the surface part of the said discharge switching member may surface-contact the surface part of the said grain discharge port from the lower side in the said discharge prevention attitude | position.   The grain discharging apparatus according to claim 1, further comprising a protruding part facing downward on the opposite side of the surface part of the grain discharge port at an end of the surface part of the discharge switching member.

Images