JP4605663B2 - Thresher - Google Patents

Description

  The present invention is a waste wall conveying device for holding and conveying a threshing waste wall from a handling chamber in the rearward direction of the machine body by an endless rotating chain and a conveyance guide rod, and discharging dust from the sorting unit to the outside of the machine body by a dust discharge fan. A dust discharge path with a fan provided below the exhaust fan conveying device, and a wind dust discharge path provided below the dust discharge path with the fan so as to discharge the dust from the sorting section to the outside of the machine body by the sorting wind. The present invention relates to a threshing machine comprising a dust control body that opens and closes the wind dust path.

Conventionally, there has been a threshing machine disclosed in Patent Document 1, for example.
The threshing machine shown in Patent Document 1 includes a wind selection unit equipped with a sorting device, a dust outlet through which straw scraps to be discharged from a chaff sheave included in the sorting device are discharged together with the sorting wind, and the dust removal A dust removal control plate provided to open and close this portion at the mouth is provided.

  The dust control plate is linked to an operation detection mechanism (detection switch) via an interlocking mechanism, a motor, and a control unit. The motion detection mechanism detects that the cutting unit has been raised to a predetermined non-working position. When the mowing part raising operation by the power steering lever is performed and the motion detection mechanism is in the detection state, the dust control plate automatically swings in the direction to close the dust outlet based on the detection result of the motion detection mechanism. When the mowing unit is lowered to a predetermined mowing position, the dust control plate automatically swings in the direction to open the dust outlet.

JP-A-4-84825

  In the threshing machine provided with the dust removal control body described above, when the amount of processed material in the sorting unit is large, the amount of processed material for discharge generated in the sorting unit increases, so that the processed material for discharging is quickly discharged. The dust removal control body is opened and switched to the posture so that dust is not easily mixed in the second processed material or the second processed material. When the amount of processed material in the sorting section is small, the processed material is easily blown away by the sorting wind, so that the dust control body is switched to the closed position so that the loss of grains discharged together with the sorting wind can be suppressed or avoided. .

  When the above-described conventional technique is employed, the opening / closing switching of the dust control body can be automatically performed. However, an actuator that opens and closes the dust control body, a control means that operates the actuator, and a detection means must be provided, and the operation mechanism tends to be large.

  An object of the present invention is to provide a threshing machine that can perform appropriate automatic opening and closing of a dust control body with a small-scale operation mechanism, and can easily perform the occurrence of malfunction of the operation mechanism. Is to provide.

The first invention includes a waste wall conveying device for holding and conveying the threshing waste wall from the handling chamber in the rearward direction of the machine body by the endless rotating chain and the conveyance guide rod, and the dust from the sorting unit outside the machine body by the dust discharge fan. A dust exhaust path with a fan provided below the exhaust fan conveying device to be discharged, and a wind dust exhaust provided below the dust exhaust path with the fan so as to discharge the dust from the sorting unit out of the machine body by the sorting wind. In a threshing machine comprising a path and a dust removal control body that opens and closes the wind dust path, a support member is fixed to a frame constructed over the left and right lateral side walls of the machine body, and the conveyance end of the conveyance guide rod As the upper and lower ends of the fuselage are connected to the support member in a vertically slidable manner, the transport guide rod moves away from the endless rotating chain by a set interval or more. The dust removal system The body is switched to an open posture, and the dust control body is switched to a closed posture as the conveyance guide rod moves so as to be positioned below the set interval with respect to the endless rotation chain. An interlocking mechanism for interlocking the conveyance guide rod and the dust control body is provided between the rotation interlocking shaft provided laterally on the outside of the dust exhaust path with the fan, one end of the rotation interlocking shaft, and the connecting rod. And the other end of the rotation interlocking shaft and the end of the rotation support shaft of the dust removal control body are interlocked with the fan on the side opposite to the threshing feed chain side. A link mechanism arranged outside the dust path, and the cam-type interlocking portion is integrated with a contact portion provided at a lower end portion of the connecting rod and one end portion of the rotation interlocking shaft. With a cam body provided freely Thus, the cam body is rotated in conjunction with the vertical sliding of the connecting rod by the contact between the contact portion and the cam body, so that the transport guide rod and the dust control body are moved. It is configured to work together.

According to the configuration of the first aspect of the invention, the dust control body is automatically switched to the open position when the amount of processed material in the sorting section increases, and the dust control body is in the closed position when the amount of processed material in the sorting section decreases. Switching operation is automatically performed.

That is, when the amount of cereals supplied to the handling room increases, the amount of processed material supplied to cause the sorting unit to perform sorting processing from the handling room increases. At this time, the amount of threshing wastewater discharged from the handling room increases. Then, the amount of the threshing waste straw conveyed by the waste straw conveying device increases, and the conveyance guide rod moves to the side away from the endless rotating chain.
When the amount of cereal straw supplied to the handling room decreases, the amount of processed material supplied from the handling room to the sorting section decreases. At this time, the amount of threshing wastewater discharged from the handling room is reduced. Then, the amount of the threshing waste straw conveyed by the waste straw conveying device is reduced, and the conveyance guide rod moves toward the endless rotating chain.

  As a result, if the set interval is appropriately set based on the change in the distance between the conveyance guide rod and the endless rotating chain accompanying the change in the amount of the threshing waste straw in the waste straw conveying device, the amount of processed material in the sorting unit increases. In this case, the dust control body automatically switches to the open position due to the separation of the transport guide rod from the endless rotating chain and the interlocking between the transport guide rod and the dust control body by the interlocking mechanism. When the amount of processed material in the sorting unit decreases, the dust control body is closed because of the approach of the transport guide rod to the endless rotating chain and the interlocking mechanism between the transport guide rod and the dust control body. Switch automatically.

According to the configuration of the first aspect of the present invention, the interlocking mechanism is provided with the rotation interlocking shaft provided laterally outside the dust exhaust path with the fan, the cam interlocking provided between the one end of the rotation interlocking shaft and the connecting rod. And a link mechanism that interlocks the other end of the rotation interlocking shaft and the end of the rotation support shaft of the dust control body. The mechanism is in a state of bypassing the dust exhaust path with the fan, and the dust discharged by the dust exhaust path with the fan is difficult to adhere to the interlocking mechanism.

As a result, the dust control body is automatically switched to an open or closed posture suitable for the amount of processed material in the sorting unit regardless of changes in the amount of processed material in the sorting unit. While the threshing operation can be performed while suppressing the grain discharge, a small-scale structure that only includes the interlocking mechanism is sufficient, and the threshing operation can be obtained at a low cost. In addition, it is easy to avoid a malfunction due to dust adhesion of the interlocking mechanism, and the dust control body can be appropriately switched from this side to the side.
According to the configuration of the first aspect of the present invention, after the dust control body is switched to the open position due to the separation movement of the transport guide rod with respect to the endless rotation chain, the amount of threshing drainage further increases, and the endless rotation of the transport guide rod If the separation movement with respect to the moving chain further occurs, the movement of the conveyance guide rod is absorbed by the sliding contact between the cam body and the contact portion, and the operation of the conveyance guide rod can be prevented from being transmitted to the dust control body. .
Therefore, even if there is an abnormal increase in the amount of threshing wastewater, an excessive operating force is not applied to the dust control body after switching to the open position, and deformation and breakage can be avoided.

In this 2nd invention, in the structure of this 1st invention, the edge part located in the opposite side to the threshing feed chain side with respect to the said waste straw conveying apparatus of the said rotation interlocking shaft, and the rotation support of the said dust control body the threshing feed chain side with respect to the wind dust-exhaust path of the axis are in conjunction with an end portion located outside the opposite side big one the wind dust-exhaust path by the link mechanism.

  According to the configuration of the second aspect of the invention, the rotation interlocking shaft and the link mechanism ensure that the interlocking mechanism bypasses the dust exhaust path with the fan along the outer periphery of the dust exhaust path with the fan. It can be smoothly transmitted to the dust control body.

  Therefore, it is possible to smoothly open / close the dust control body while avoiding the malfunction of the interlocking mechanism due to dust adhesion.

According to a third aspect of the present invention, in the configuration of the first or second aspect of the present invention, the connecting rod is lifted and biased by a spring provided in a state of being attached to the connecting rod between the transport guide rod and the support member. In addition, the cam body is swung through the link mechanism by the weight of the dust control body, and is applied to the contact portion and biased .

  According to a fourth aspect of the present invention, in the configuration according to any one of the first to third aspects of the invention, when the transport guide rod moves so as to be positioned below the set interval with respect to the endless rotation chain, the dust control The interlock mechanism is provided with a delay means for delaying the closing operation of the dust control body so that the body switches to the closed posture after a set time has elapsed from the movement of the transport guide rod to a position less than the set interval. .

  According to the configuration of the fourth aspect of the invention, even if the amount of threshing wastewater decreases, the dust control body does not immediately switch to the closed position, but switches to the closed position after the amount of processed material in the sorting unit actually decreases. it can.

That is, even if the exhaust straw is reduced in exhaust straw conveying device, and still treated fed before its reduction remains the screening portion, reduction of the treated volume in sorting section, discharge of waste straw conveying device Occurs after the occurrence of straw reduction. As a result, if the set time is appropriately set based on the delay time, even if the conveyance guide rod moves so as to be positioned below the set interval with respect to the endless rotating chain, the delay means acts to remove dust. The control body is not immediately switched to the closed posture, and the dust control body is switched to the closed posture after the processed material in the sorting section is actually reduced.

  Therefore, even if a decrease in threshing waste straw occurs in the waste straw conveying device, the dust control body is maintained in an open position until the amount of processed material in the sorting unit actually decreases, and the amount of processed material in the sorting unit is actually reduced. After the decrease, the dust control body is switched to the closed position, and regardless of changes in the amount of cereal supplied to the handling room, it is possible to accurately control the mixing of kernel dust and kernel discharge through the wind exhaust path. can do.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a longitudinal side view of a threshing machine according to an embodiment of the present invention. As shown in this figure, the threshing machine according to the present embodiment includes a threshing feed chain 11 provided outside the machine body 1, a threshing unit 10 having a handling chamber 12 provided at the front part of the machine body, and the handling machine. A waste blower transfer device 20 provided behind the chamber 12, a sorting unit 30 having a swing sorting device 31 provided below the handling chamber 12, and a dust exhaust fan provided below the waste blower transfer device 20. A dust discharge unit 40 having 41, a first screw conveyor 2 and a second screw conveyor 3 provided at the bottom of the sorting unit 30, and a waste straw treatment device 50 provided continuously at the rear of the machine body 1. ing.

  This threshing machine is equipped with a combine, and performs a threshing process of a harvested cereal mash that has been cut by a combine harvester (not shown), a threshing grain sorting process, and a threshing drainer process.

  That is, the threshing unit 10 includes the threshing feed chain 11 and the handling chamber 12, and a receiving net 13 provided in the lower portion of the handling chamber 12. Do.

  That is, the threshing feed chain 11 supplies the tip side of the harvested grain culm to the handling chamber 12 while nipping and conveying the stock side of the harvested grain culm to the rear side of the machine body. The handling chamber 12 is provided with a handling cylinder 14 that is rotatably driven around a longitudinal axis of the machine body in the handling chamber. The handling cylinder 14 handles the tip side of the supplied harvested cereal meal. The threshing feed chain 11 carries the threshing waste wall from the dust feed port 15 located at the rear end of the handling chamber 12 to the rear of the handling chamber 12.

  The waste straw conveying device 20 is arranged in such a manner that the conveyance start end side is located near the lateral side of the conveyance termination portion of the threshing feed chain 11 and the conveyance termination side is located above the waste straw inlet 51 of the waste straw treatment device 50. The endless rotating chain 21 provided at the rear part and a transport guide rod 22 provided along the endless rotating chain 21 below the transport side of the endless rotating chain 21 are configured.

  As shown in FIGS. 1 and 3, the conveyance start end side and the conveyance end side of the conveyance guide rod 22 are supported on the fuselage side via a vertical connection rod 23 whose upper end is coupled to the conveyance guide rod 22. 24. The support member 24 on the conveyance start end side is fixed to a chain guide that travels and guides the threshing feed chain 11. The support member 24 on the conveyance end side is fixed to the frame 4 of the machine body 1. The support members 24 on the transport start end side and the transport end side support the connecting rod 23 so as to be slidable in the vertical direction. Each connecting rod 23 is arranged between the conveyance guide rod 22 and the support member 24 and is urged upward by a spring 25 attached to the connecting rod 23. Thereby, the conveyance guide rod 22 is urged by the spring 25 so as to approach the endless rotation chain 21.

  The waste straw conveying device 20 inherits the stock source side of the threshing waste straw discharged from the handling chamber 12 from the threshing feed chain 11 between the endless rotating chain 21 and the conveyance guide rod 22, and the threshing waste thus inherited. The endless rotating chain 21 and the conveyance guide rod 22 are arranged in a horizontal posture in which the crown is placed on a support rail (not shown) whose tip side is located closer to the tip side than the waste straw conveying device 20. Thus, the paper is nipped and conveyed in the rearward direction of the machine body and dropped onto the waste straw inlet 51 of the waste straw treatment apparatus 50. The endless rotating chain 21 is arranged such that the distance from the threshing feed chain 11 becomes larger toward the conveyance end side, and the waste straw conveying device 20 is configured so that the threshing waste straw is placed on the threshing feed chain side with respect to the body 1. Transport while moving to the opposite side.

  When the amount of threshing waste straw conveyed by the waste straw conveying device 20 changes, the volume of the threshing waste straw changes, so that the conveyance guide rod 22 operates with the operating force by the spring 25 and the reaction force from the threshing waste straw. To move away from or approach the endless rotating chain 21. As a result, the larger the amount of waste straw, the larger the distance between the conveyance guide rod 22 and the endless rotating chain 21, and the smaller the amount of waste wall, the smaller the distance between the conveyance guide rod 22 and the endless chain 21. become.

  The waste straw processing apparatus 50 includes a shredder case 52 having the waste straw inlet 51 and a long straw outlet 53 provided above the rear end side of the shredder case 52. The shredding case 52 includes a lid 54 that is swingably attached so as to open and close the drainer inlet 51, and a cutter shaft 55 that is provided inside the case so as to be able to be driven and rotated around an axis that faces the machine body. And a cutter shaft 55 and a shredder outlet 57 provided below the supply shaft 56.

  When the lid 54 is operated to close, the waste straw processing apparatus 50 enters a long straw discharge processing state. Then, the waste straw processing apparatus 50 guides the threshing straw from the waste straw transporting apparatus 20 down to the long straw outlet 53 on the outer surface side of the lid 54, and the long straw outlet 53 extends to the ground behind the fuselage. Drop in a straw state.

  When the lid 54 is operated to open, the waste straw processing apparatus 50 enters a shredder release processing state. Then, the waste straw processing device 50 drops the threshing waste straw from the waste straw conveying device 20 from the waste straw inlet 51 into the shredded case 52, and the cutter shaft 55 is arranged in the axial direction of the cutter shaft 55. It is shredded in a slimming direction by a disc-shaped cutting blade provided so as to be integrally rotatable, and a disc-type feeding blade provided so that the supply shaft 56 is arranged in the axial direction of the shaft so as to be integrally rotatable. The waste straw in the state is dropped from the shredded straw discharge port 57 to the ground.

  The sorting unit 30 includes the swing sorting device 31, and further includes a red pepper 32 provided below the front end side of the swing sorting device 31 and a processing rotator 33 provided behind the dust feeding port 15. It is prepared.

  The processing rotator 33 is driven to rotate around the horizontal axis of the machine body and receives and supports the straw scraps discharged from the dust feed port 15 of the handling chamber 12 on the upper Strollac 34 provided in the swing sorting device 31. Dissolve and remove grain from straw.

  The swing sorter 31 includes the upper stroller 34, the glen pan 35 positioned below the receiving net 13, and the chaff sheave 36, and the strobac 37 provided behind the chaff sheave 36. A grain sieve 38 is provided below 36.

  The sorting unit 30 swings and sorts the processed product from the processing rotating body 33 and the processed product dropped and supplied from the handling chamber 12 through the receiving net 13 by the swing sorting device 31 and the waste 32. Sorting into the first processed material, the second processed material, and the processed material for discharge such as straw scraps by the air sorting by the sorting air supplied toward the dust unit 40, the first processed material and the second processed material The product is dropped from the swinging sorter 31 and the processed material for discharge is sent to the dust removing unit 40.

  The first screw conveyor 2 carries out the first processed material dropped from the swing sorting device 31 to the lateral outer side of the machine body 1 and supplies it to the cerealing device 4. The cerealing device 4 feeds threshed grains into a combine grain tank (not shown). The second screw conveyor 3 carries out the second processed material dropped from the swing sorting device 31 to the lateral outer side of the machine body 1 and supplies it to the reduction device 5. The reduction device 5 conveys the second processed material to a reduction port provided on the lateral side wall of the machine body 1, sends the processed material into the machine body from the reduction port, and returns it to the start end side of the swing sorting device 31.

  The dust discharge section 40 includes a fan dust discharge path A having the dust discharge fan 41 and a wind dust discharge path B provided below the fan dust discharge path A.

  The dust exhaust path A with a fan is formed by a fan case 42 in which the dust exhaust fan 41 is drivably accommodated. The dust exhaust path A with a fan includes the dust exhaust fan 41 and the fan case 42. A dust suction port 43 that is a suction port and a dust discharge port 44 that is a discharge port of the fan case 42 are provided.

  The dust suction port 43 is located above the rear end of the swing sorting device 31 so as to open toward the swing sorting device 31. The dust discharge port 44 is located in the shredded case 52 so as to open toward the shredder outlet 57.

  As a result, the dust discharge path A with the fan sucks the processed material for discharge sent out from the rear part of the sorting unit 30 from the dust suction port 43 by the feed force of the dust discharge fan 41 and shreds from the dust discharge port 44. It is discharged out of the machine body through the case 52. The fan-equipped dust discharge path A sucks and discharges a part of the sorting air from the tang 32 together with the processed material.

  The wind dust discharge path B is formed by a portion 42 a of the fan case 42 located below the dust discharge fan 41 and a rear end portion of the swing sorting device 31, and a rear end of the swing sorting device 31. It communicates with the department. The wind dust discharge path B includes a dust discharge port 45 provided at the rear end of the machine body 1 below the dust discharge port 44 of the dust discharge path A with a fan. The dust discharge port 45 opens toward the long straw discharge port 57 of the shredded case 52.

  The wind dust discharge path B introduces the discharge processed material sent out from the sorting unit 30 by the transfer force by the sorting wind from the Karatsu 32 and discharges it from the dust discharge port 45 through the shredded case 52 to the outside of the machine body. .

  The wind dust removal path B includes a plate-shaped dust removal control body 60 provided at a portion slightly inside the machine body from the dust discharge port 45. As shown in FIG. 3, the dust removal control body 60 is swingably supported on the left and right lateral side walls 1a of the machine body 1 via a rotation support shaft 61 provided rotatably at the upper end portion thereof. .

  FIG. 2A is a side view of the dust control body 60 in the closed posture. As shown in this figure, the dust removal control body 60 is in a closed position when the rotary support shaft 61 is swung downward about the machine body lateral axis of the rotary support shaft 61 by the rotation operation of the rotary support shaft 61. . Then, the dust control body 60 assumes a posture that intersects the processing flow direction of the wind dust path B so as to suppress the passage of the processing object of the wind dust path B.

  FIG. 2B is a side view of the dust control body 60 in the open posture. As shown in this figure, the dust removal control body 60 is in an open position when the rotation support shaft 61 is operated to swing upward about the machine body lateral axis of the rotation support shaft 61 by the rotation operation of the rotation support shaft 61. . Then, the dust removal control body 60 assumes a posture along the processing object moving direction of the wind dust exhaust path B so as to facilitate the passage of the process object in the wind dust exhaust path B.

  As shown in FIG. 3, the dust removal control body 60 is a rocker provided integrally with the end of the rotary support shaft 61 so as to be connected to the side opposite to the side where the threshing feed chain 11 is located. The interlocking mechanism 70 provided with the moving arm 71 is interlocked with a portion to which the connection rod 23 on the conveyance end side of the conveyance guide rod 22 is coupled.

  FIG. 2 shows the structure of the interlocking mechanism 70 in a side view. FIG. 3 shows the structure of the interlocking mechanism 70 in the rear view. As shown in these drawings, the interlocking mechanism 70 includes a link mechanism L having the swing arm 71, a rotation interlocking shaft 72 in the lateral direction of the machine body provided outside the dust exhaust path A with the fan, The connecting rod 23 is provided with a cam-type interlocking portion 80 provided over the connecting rod 23 and the end portion of the rotation interlocking shaft 72 on the threshing feed chain side.

  The link mechanism L includes the swing arm 71 and a swing arm 73 provided to be rotatable integrally with an end portion of the rotation interlock shaft 72 opposite to the side where the cam-type interlock portion 80 is provided. And an interlocking link 74 that connects the swing arm 73 and the swing arm 71. This link mechanism L is outside the dust-discharging path A with the fan and the wind dust-discharging path B on the opposite side of the threshing feed chain side with respect to the dust-discharging path A with the fan and the dust control body 60, and It is located below the passage 26 of the threshing waste straw conveyed by the waste straw conveying device 20.

  As shown in FIG. 2, the cam-type interlocking portion 80 includes an oscillating cam body 81 that is integrally rotatable at the end of the rotation interlocking shaft 72, and the cam body at the lower end of the connecting rod 23. And a transmission member 82 made of a round bar material configured and connected so as to extend toward 81. The cam-type interlocking portion 80 is covered with a cover 85 so that dust does not easily adhere.

  The cam body 81 includes a cam surface 83 that is a peripheral surface of a cam surface forming body attached thereto. The transmission member 82 includes an abutting portion 84 configured to abut on the cam surface 83 at an extended end portion thereof. The cam body 81 is oscillated and biased via the link mechanism L due to the weight of the dust control body 60, thereby biasing the cam surface 81 against the contact portion 84.

  When the conveyance guide rod 22 moves away from or moves closer to the endless rotating chain 21, the cam-type interlocking portion 80 is brought into contact with the conveyance portion 80 by the contact between the contact portion 84 and the cam body 81. By interlocking the rod 22 and the rotation interlocking shaft 72, the conveyance guide rod 22 and the dust control body 60 are interlocked as follows.

  That is, as shown in FIG. 2B, the conveyance guide rod 22 moves so as to be separated from the endless rotation chain 21, and when the interval between the conveyance guide rod 22 and the endless rotation chain 21 reaches the set interval D, As shown in FIG. 2 (a), the dust control body 60 is in the open position, and the conveyance guide rod 22 moves so as to approach the endless rotation chain 21, and the conveyance guide rod 22 and the endless rotation chain 21 are moved. When the interval is smaller than the set interval D (less than the set interval), the dust control body 60 is interlocked so as to be in the closed posture.

  Further, when the distance between the transport guide rod 22 and the endless rotating chain 21 is an interval exceeding the set interval D (more than the set interval), the transport guide rod 22 is moved relative to the endless rotating chain 21 in this case. Absorbed by the sliding contact of the contact portion 84 with the cam surface 83, the transmission from the conveying guide rod 22 to the dust control body 60 is cut off, and the dust control body 60 is interlocked so as to maintain the open posture. Yes.

That is, the interlocking mechanism 70 is configured so that the threshing feed chain of the conveyance guide rod 22 is connected to the outer side of the dust removal path A with the fan from the portion where the connection rod 23 on the conveyance end side is coupled. The conveyance guide rod 22 and the dust control body 60 are interlocked with each other while passing through the outside on the opposite side to the threshing feed chain side of the dust control body 60 and being connected to the dust control body 60. I am letting.
Thereby, when the conveyance guide rod 22 moves so as to be separated from the endless rotation chain 21 by the set interval D or more, the dust control body 60 is in the open posture in conjunction with this, and the conveyance guide rod 22 is endless. If it moves so that it may be located in less than the said setting space | interval D with respect to the rotation chain 21, the dust removal control body 60 will be in the said closed position in response to this.

  When the amount of cereals supplied to the handling chamber 12 increases, the amount of the processed product supplied from the handling chamber 12 to the sorting unit 30 increases, and the amount of processing products for discharge such as straw scraps generated in the sorting unit 30 increases. . Then, it becomes easy to generate | occur | produce dust mixing of the 1st processed material and the 2nd processed material. When the amount of cereals supplied to the handling chamber 12 decreases, the amount of processed material supplied from the handling chamber 12 to the sorting unit 30 decreases. Then, it becomes easy to generate | occur | produce the scattering of the grain by a selection wind. If the amount of cereal straw supplied to the handling chamber 12 increases, the amount of threshing waste straw supplied to the waste straw transporting device 20 increases, and the distance between the transport guide trough 22 and the endless rotating chain 21 increases. As the set interval D, an interval that occurs when the amount of processed material for discharge generated in the sorting unit 30 increases is set.

  As a result, when the amount of cereal straw supplied to the handling chamber 12 increases, the dust discharger 40 is discharged by the separation movement of the conveyance guide basket 22 with respect to the endless rotation chain 21 at the set interval D or more and the interlocking mechanism 70. The dust control body 60 is automatically switched to the open position, and the processed material for discharge from the sorting unit 30 is discharged out of the machine body by the dust discharge path A with the fan and the wind dust discharge path B.

  When the amount of the culm supplied to the handling chamber 12 decreases, the dust discharging unit 40 controls the dust discharge by the movement of the conveyance guide rod 22 positioned less than the set interval D with respect to the endless rotation chain 21 and the interlocking mechanism 70. The body 60 is automatically switched to a closed posture, and the processed material for discharge from the sorting unit 30 is discharged out of the machine body mainly through the dust discharge path A with a fan.

  FIG. 4 shows the structure of the interlocking mechanism 70 according to the second embodiment in the rear view. FIG. 5 is a plan view of a part of the interlocking mechanism 70 according to the second embodiment.

  When the interlocking mechanism 70 of the second embodiment is compared with the interlocking mechanism 70 of the first embodiment described above, the connecting rod 23, the cam-type interlocking portion 80, the rotation interlocking shaft 72, the link mechanism L, The interlocking mechanism 70 of the second embodiment is identical to the interlocking mechanism 70 of the first embodiment in that the interlocking mechanism 70 is provided. The interlocking mechanism 70 of the second embodiment is provided with a delay means 90. In this respect, the interlocking mechanism 70 of the second embodiment is different from the interlocking mechanism 70 of the first embodiment. Next, the delay means 90 will be described.

  As shown in FIGS. 5 and 6, the delay means 90 is a check plate that is supported by a support piece 91 and a rotary support shaft 61 that are rotatably provided integrally with the rotary support shaft 61 of the dust control body 60. 92, a feed screw shaft 93 rotatably supported on the lateral side wall 1a of the fuselage 1, and a feed screw shaft 93 that is rotatably supported on the lateral side wall 1a in mesh with a gear 94 that is integrally rotatable. And a driving gear 95.

  The drive gear 95 is always driven, and drives the feed screw shaft 93 to always rotate. The check plate 92 is configured by a spring plate. The support piece 91 includes a spring 97 attached to the support pin 96 and supporting the check plate 92 via a support pin 96 inserted through the base side of the check plate 92. The spring 97 urges the check plate 92 against the support piece 91 so that the check plate 92 can be easily returned to the attachment posture in contact with the support piece 91 even when the check plate 92 is attached to the support piece 91 at a distance. .

  FIG. 5A is a plan view of the delay means 90 in a state where the dust control body 60 is in the open posture OP. FIG. 6A is a side view of the delay unit 90 in a state where the dust control body 60 is in the open posture OP. As shown in these drawings, when the dust control body 60 is in the open posture OP, the check arm 92 is in a mounting posture that is positioned slightly upward from the feed screw shaft 93.

  FIGS. 5B, 5 </ b> C, and 5 </ b> D are plan views showing the operating state of the delay means 90. FIG. 6B is a side view of the delay means 90 in the state shown in FIG. FIG. 6C is a side view of the delay means 90 in the state shown in FIG. FIG. 6 (d) is a side view of the delay means 90 in the state shown in FIG. 5 (d).

  As shown in these drawings, when the interlocking mechanism 70 is operated as the transport guide rod 22 moves to a position less than the set interval D with respect to the endless rotating chain 21, the swinging arm 71 by the interlocking link 74 is moved. Due to the rotation of the rotation support shaft 61 by the swinging operation, the check arm 92 is mounted on the feed screw shaft 93. At this time, the dust control body 60 swings from the open position OP to the close side. However, the check arm 92 is received and supported by the feed screw shaft 93 to keep the dust control body 60 closed and not yet switched to the posture CL. At this time, the cam-type interlocking portion 80 allows the conveyance guide rod 22 to move to a position less than the set interval D with respect to the endless rotating chain 21 due to the separation of the contact portion 84 from the cam surface 83.

  When the check arm 92 rides on the feed screw shaft 93 in this manner, the feed screw shaft 93 feeds the check arm 92 due to the contact between the thread of the feed screw shaft 93 and the check arm 92, and the check arm 92 rotates. The portion connected to the shaft 61 is elastically deformed in a state of swinging in the direction along the rotary support shaft 61 with the swing fulcrum as a swing support point. As this elastic change proceeds, the check arm 92 is detached from the feed screw shaft 93. Then, the check arm 92 swings downward by the natural lowering of the dust control body 60 and allows the dust control body 60 to switch to the closed posture CL.

  Even when the check arm 92 is detached from the feed screw shaft 93, the check arm 92 and the feed screw shaft 93 overlap with each other when viewed in the direction along the axis of the feed screw shaft 93. Thereby, when the dust control body 60 is switched from the closed posture to the open posture, the check arm 92 returns to the upper side of the feed screw shaft 93 without being subjected to the rising obstacle by the feed screw shaft 93.

  As a result, the delay means 90 moves while the check arm 92 is being fed by the feed screw shaft 93 when the transport guide rod 22 moves so as to be positioned below the set interval D with respect to the endless rotating chain 21. Dust control is performed after a closing operation of the dust control body 60 is delayed and a set time determined by the feed time of the check arm 92 by the feed screw shaft 93 has elapsed from the movement of the transport guide rod 22 to a position less than the set interval D. The body 60 is closed and switched to the posture CL.

  That is, the delay means 90 does not immediately switch the dust control body 60 to the closed posture CL even when the transport guide rod 22 returns from a position greater than the set interval D to the endless rotation chain 21 to a position less than the set interval D. When the conveyance guide rod 22 is at a position equal to or larger than the set interval D with respect to the endless rotating chain 21, it is set that the discharge processing product that is supplied to the sorting unit 30 and remains still is discharged. After the set time has elapsed, the dust control body 60 is closed and switched to the posture CL.

[Another Example ]

  Instead of the dust control body 60 shown in the above embodiment, a dust control body configured in a rake shape may be adopted.

Longitudinal side view of threshing machine (B) is a side view of the dust control body in the closed position, and (b) is a side view of the dust control body in the open position. Rear view of interlocking mechanism arrangement part of threshing machine Rear view of the interlocking mechanism of the second embodiment (A) is a plan view of the delay means in a state in which the dust control body is in the open posture, (B), (C), (D) are plan views showing the operating state of the delay means. (A) is a side view of the delay means in a state in which the dust control body is in the open position, (B), (C), (D) are side views showing the operating state of the delay means.

1a lateral wall
4 frame 12 Handling chamber 20 Waste straw conveying device 21 Endless rotating chain 22 Conveying guide rod
23 linkages
24 support members
25 Spring 30 Sorting part 41 Dust exhausting fan 60 Dust exhausting control body 61 Rotating spindle 70 Interlocking mechanism 72 Rotating interlocking shaft 80 Cam type interlocking part 81 Cam body
8 4 Abutting portion 90 Delay means A Dust exhaust path with fan B Wind exhaust path L Link mechanism

Claims (4)

A waste straw transporting device for sandwiching and transporting the threshing waste straw from the handling chamber by an endless rotating chain and a transport guide rod, and the waste straw for discharging dust from the sorting section to the outside of the body by a dust exhaust fan. A dust discharge path with a fan provided below the conveying device, a wind dust discharge path provided below the dust discharge path with the fan so as to discharge the dust from the sorting unit to the outside of the machine body by the selection wind, and the wind discharge A threshing machine comprising a dust control body for opening and closing a dust path,
A support member is fixed to a frame extending over the left and right lateral side walls of the machine body, and an upside-down connecting rod whose upper end is coupled to the conveyance end side of the conveyance guide rod can be slid up and down on the support member. To support
As the transport guide rod moves so as to be separated from the endless rotating chain by a set interval or more, the dust control body is switched to an open posture, and the transport guide rod is moved relative to the endless rotating chain. An interlock mechanism that interlocks the conveyance guide rod and the dust control body so that the dust control body is switched to a closed position as it moves to be less than the set interval, A rotation interlocking shaft provided laterally outside the path, a cam interlocking portion provided across one end of the rotation interlocking shaft and the connecting rod, the other end of the rotation interlocking shaft, and the dust A link mechanism that interlocks with the end of the rotation spindle of the control body and that is disposed on the opposite side of the threshing feed chain side and outside of the dust removal path with the fan ,
The cam-type interlocking portion includes a contact portion provided at a lower end portion of the connecting rod and a cam body provided at one end portion of the rotation interlocking shaft so as to be integrally rotatable. The cam body is rotated in conjunction with the vertical sliding of the connecting rod by the contact between the contact portion and the cam body, and the conveyance guide rod and the dust control body are interlocked. Threshing machine.   An end portion of the rotation interlocking shaft located on the opposite side to the threshing feed chain side with respect to the waste straw conveying device, and a threshing feed chain side with respect to the wind dust path of the rotation support shaft of the dust control body The threshing machine according to claim 1, wherein an end portion located on the opposite side to the wind dust exhaust path is interlocked with the link mechanism. The connection rod is biased upward by a spring provided in a state of being mounted on the connection rod between the transport guide rod and the support member,
The threshing machine according to claim 1 or 2, wherein the cam body is swung through the link mechanism according to the weight of the dust removal control body and applied to the contact portion and biased.   When the transport guide rod moves so as to be positioned less than the set interval with respect to the endless rotation chain, a set time elapses from the movement of the transport guide rod to a position less than the set interval. The threshing machine according to any one of claims 1 to 3, wherein a delay means for delaying the closing operation of the dust control body is provided in the interlocking mechanism so as to switch to a closed posture after the operation.

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