JP2018164410A - Combine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combine with a configuration having a conveyance device for conveying/supplying grain culms reaped by a reaping part to a threshing part, which is capable of performing an operation in a reverse rotation direction of a conveyor in the conveyance device by a simple structure without causing the complication of the structure, eliminating the clogging of grain culms in the conveyance device, and improving operability of a reverse rotation operation of the conveyor.SOLUTION: A combine 1 is equipped with a feeder 30 for supplying reaped grain culms to a threshing part 7. The feeder 30 includes a conveyor 36 with a reaping input shaft 38 as a drive shaft in a feeder house 35, and is provided so as to be lifted and lowered by the rotation around the reaping input shaft 38 relatively to a combine main machine. The combine includes a reverse rotation mechanism 110 for transmitting a lifting operation of the feeder 30 to the reaping input shaft 38, and rotating the reaping input shaft 38 in a direction opposite to the rotation direction at the time of conveying the grain culms using the lifting operation of the feeder 30, and the actuation/non-actuation of the reverse rotation mechanism 110 is operated by the operation of an operation clutch lever 23.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a combine equipped with a conveying device that conveys cereals harvested by a reaping unit and supplies them to a threshing unit.

  2. Description of the Related Art Conventionally, there is a combine provided with a feeder which is a transport device that transports cereals harvested by a mowing unit and supplies them to a threshing unit. A feeder is provided with the structure which provided the conveyor for cereal conveyance in the feeder house as a housing. The conveyor has a cutting input shaft whose axial direction is the left-right direction as a drive shaft of the conveyor that pivotally supports the feed end side.

  The rear end portion of the feeder is rotatably supported on the traveling machine side of the combine with the cutting input shaft as a rotation shaft. The feeder constitutes a cutting part together with a cutting blade device, a take-up reel and the like provided on the front side thereof, and the cutting part is configured to move up and down by the rotation of the feeder with respect to the traveling machine body.

  In the combine of such a configuration, there is a combine provided with a configuration for reversing the conveyor in order to eliminate clogging of the cereal, in case the cereal is clogged with a feeder (for example, Patent Document 1, 2).

  Patent Document 1 has a configuration in which reverse rotation power extracted from a handling cylinder transmission device for transmitting engine power to a handling cylinder is transmitted via a reverse clutch to a cutting input shaft serving as a conveyor input shaft of a feeder. It is disclosed. In such a configuration, when the cereal is clogged with the feeder, the feeder is reversely driven by turning on and operating the reverse clutch.

  Further, Patent Document 2 discloses a reversing mechanism that reverses rotation transmitted to a cutting input shaft that is a conveyor input shaft of a feeder, a handling cylinder input shaft that rotates a handling cylinder of a threshing portion by receiving engine power, and a cutting input. There is disclosed a configuration in which an input / output clutch for reverse rotation power with respect to a cutting input shaft is provided in a transmission mechanism between the shaft and a reverse rotation mechanism. The reverse rotation mechanism of Patent Document 2 includes a pulley, a belt and a gear for transmitting power for reversing the cutting input shaft, a shaft for supporting these, and the like.

  Further, in both configurations of Patent Document 1 and Patent Document 2, a clutch lever for operating a clutch for connecting / disconnecting the reverse rotation power with respect to the cutting input shaft is disposed between the cabin and the feeder.

JP 2014-14333 A Japanese Patent Laid-Open No. 2006-136924

  Each of the conventional techniques as described above has a configuration in which a reverse transmission mechanism for reversing the conveyor is provided in a path for transmitting power from the engine to the cutting unit. For this reason, the power transmission mechanism from the engine to the cutting unit is structurally complicated, the number of parts is increased, and the cost is disadvantageous. Further, according to the configuration in which the power transmission mechanism for reverse rotation is provided in a manner branched from the power transmission path for forward rotation of the cutting input shaft as in the configuration of Patent Document 2, the power transmission mechanism for forward / reverse rotation is provided. A structure for avoiding mutual interference is required. For this reason, there exists a problem that a structure becomes complicated or an apparatus structure becomes large.

  In addition, since the above-described conventional technique has a configuration in which a clutch lever for reversing the cutting input shaft is provided, the number of objects to be operated by the operator increases and the operation becomes complicated. In addition, because the reverse clutch lever is located between the cabin and the feeder, it may be difficult for the operator to operate the reverse clutch lever while sitting in the driver's seat. I can't get sex.

  The present invention has been made in view of the above problems, and in a configuration including a transport device that transports and supplies cereals harvested by a mowing unit to a threshing unit, the structure is complicated. Without inviting, it is possible to operate the conveyor in the reverse direction of the conveyor in the transport device, to eliminate clogging of the cereals in the transport device, and to improve the operability of the conveyor reverse operation It aims at providing the combine which can do.

  The combine which concerns on this invention is a combine provided with the conveying apparatus which conveys the grain cocoon cut in the cutting part, and supplies it to a threshing part, Comprising: The said conveying apparatus is an axial direction in the left-right direction in a housing. As a drive shaft serving as an input shaft that receives power transmission, and is provided so as to move up and down by rotation about the input shaft relative to the main unit of the combine. A reversing mechanism that transmits the ascending operation to the input shaft and rotates the input shaft in the direction opposite to the rotation direction during the transportation of the cereal using the ascending / descending operation of the conveying device, the reaping unit and the threshing unit The operation / non-operation of the reversing mechanism is operated by the operation of the work operation tool for performing at least one of the operations.

  Moreover, the combine which concerns on the other aspect of this invention WHEREIN: In the said combine, the said operation operating tool makes the transmission state to the said cutting part and the said threshing part into a cut-off state as the operation position, and uses the said reverse rotation mechanism. A stop operation position that is in an inoperative state, a position that is moved by a predetermined amount in at least a first direction from the stop operation position, and the transmission of power to at least one of the mowing unit and the threshing unit is in an on state A work operation position to be moved, and a position moved from the stop operation position by a predetermined amount in a second direction different from the first direction, and a reverse rotation operation position for operating the reverse rotation mechanism. .

  Moreover, the combine which concerns on the other aspect of this invention WHEREIN: In the said combine, the said reverse rotation mechanism is supported by the 1st engaging member supported by the protrusion part from the said housing of the said input shaft, and the said conveying apparatus. A second engagement member that is engaged with the first engagement member and transmits the ascending operation of the transport device to the input shaft via the first engagement member. And the second engagement member is connected to the work operation tool by a link mechanism, and the work operation tool moves as a work operation position by a predetermined amount from the stop operation position in the first direction. A first work operation position where the transmission of power to the threshing portion is turned on, and a position moved a predetermined amount in the third direction from the first work operation position, the threshing portion While maintaining the power transmission state to the A second work operation position in which the transmission of power to the cutting part is turned on, and the link mechanism moves the work operation tool from the reverse operation position to the stop operation position. The second engagement member is moved to an engagement release position where the engagement with the first engagement member is released, and the work operation tool is moved from the first work operation position to the second work operation position. The second engagement member is configured to move from the disengagement position to a retracted position that has moved further in the disengagement direction.

  Moreover, the combine which concerns on the other aspect of this invention WHEREIN: In the said combine, a said 2nd direction is a direction opposite to the said 3rd direction.

  Further, the combine according to another aspect of the present invention detects, in the combine, the engine as a drive source, a control unit that controls the start of the engine, and the work operation tool in the reverse operation position. And the control unit makes it impossible to start the engine in a state where the detection device detects that the work operating tool is located at the reverse operation position. is there.

  According to the present invention, in a configuration including a conveying device that conveys and supplies the cereals harvested by the reaping portion to the threshing portion, the conveyor in the conveying device can be realized with a simple structure without causing a complicated structure. In the reverse direction, the clogging of the cereals in the conveying device can be eliminated, and the operability of the reverse operation of the conveyor can be improved.

It is a left view of the combine which concerns on one Embodiment of this invention. It is a right view of the combine which concerns on one Embodiment of this invention. It is a top view of the combine which concerns on one Embodiment of this invention. It is a figure which shows the power transmission structure in the combine which concerns on one Embodiment of this invention. It is a left view which shows the feeder which concerns on one Embodiment of this invention, and the structure of the vicinity. It is a left view which shows the structure of the feeder which concerns on one Embodiment of this invention. It is a top view which shows the rear part of the feeder which concerns on one Embodiment of this invention. It is a perspective view which shows the rear part of the feeder which concerns on one Embodiment of this invention. It is a perspective view which shows the structure of the reverse rotation mechanism which concerns on one Embodiment of this invention. It is a left view which shows the reverse rotation mechanism which concerns on one Embodiment of this invention. It is a top view which shows the reverse rotation mechanism and amplification mechanism which concern on one Embodiment of this invention. It is a back sectional view showing the reverse rotation mechanism and amplification mechanism concerning one embodiment of the present invention. It is a schematic diagram which shows the reverse rotation mechanism and amplification mechanism which concern on one Embodiment of this invention. It is a figure which shows the structure of the working clutch lever which concerns on one Embodiment of this invention. It is explanatory drawing about the operation mode of the work clutch lever which concerns on one Embodiment of this invention. It is a perspective view which shows the working clutch lever and link mechanism which concern on one Embodiment of this invention. It is a top view which shows the working clutch lever and link mechanism which concern on one Embodiment of this invention. It is a control block diagram concerning one embodiment of the present invention. It is operation | movement explanatory drawing of the working clutch lever and link mechanism which concern on one Embodiment of this invention. It is operation | movement explanatory drawing of the reverse rotation mechanism which concerns on one Embodiment of this invention.

  The present invention relates to a configuration in which a transport device that transports and supplies the cereals harvested by the reaping portion to the threshing portion is rotatable up and down about the reaping input shaft as a rotational shaft. It is intended to eliminate clogging of cereals in the transport device with a simple structure by enabling the transport device to operate in the reverse direction of the conveyor. Embodiments of the present invention will be described below.

[Overall configuration of combine]
First, the whole structure of the combine 1 which concerns on this embodiment is demonstrated using FIGS. 1-4. In the following description, the left side (lower side in FIG. 3) and the right side (upper side in FIG. 3) toward the front of the combine 1 are the left side and right side of the combine 1, respectively.

  As shown in FIG. 1 and FIG. 2, the combine 1 according to the present embodiment is a harvester capable of scraping harvested field crops into the machine body, threshing / selecting / grain storage, and appropriately transporting it outside the machine. As a normal combine. The combine 1 includes a traveling machine body 2 capable of self-running and a cutting unit 3 provided at a front end portion of the traveling machine body 2. The harvesting unit 3 is configured as a harvesting device that captures an uncut grain cereal such as rice or wheat, and is attached to the traveling machine body 2 so as to be movable up and down.

  The traveling machine body 2 includes a traveling unit 4 configured as a crawler traveling device having a pair of left and right crawler units 5 and 5. A body frame 6 is installed between the left and right crawler portions 5 and 5. Each crawler portion 5 includes a plurality of rotating bodies including a drive sprocket 5a provided at the front end portion thereof and a tension roller 5b provided at the rear end portion of the crawler portion 5, and a crawler belt 5c wound around these rotating bodies. And have. The plurality of rotating bodies constituting the crawler unit 5 are provided on a track frame 5 d provided on the lower surface side of the traveling machine body 2. Further, the drive sprocket 5a is rotated by receiving the transmission of power from the engine 25 included in the combine 1.

  On the left side of the machine body frame 6, a threshing unit 7 that threshs the cereal that has been cut and supplied by the reaping unit 3, and a sorting unit 8 that sorts the grains threshed by the threshing unit 7 are provided. . The threshing unit 7 and the sorting unit 8 are arranged in such a manner that the threshing unit 7 is an upper stage and the sorting unit 8 is a lower stage.

  On the machine body frame 6, on the right side of the threshing unit 7 and the sorting unit 8, there is provided a grain storage unit 9 having a grain tank 10 for storing the grains (clean grains) sorted by the sorting unit 8. . In the Glen tank 10, a lower discharge conveyor 11 that conveys stored grains toward the outlet of the Glen tank 10 is provided (see FIG. 4). A vertical conveyor 12 is erected in the vertical direction so as to communicate with the outlet of the Glen tank 10. A grain discharge conveyor 13 is continuously provided at the upper end of the vertical conveyor 12. The grain discharge conveyor 13 is provided so as to be turnable in the horizontal direction and swingable up and down around the horizontal axis. By these conveyors, the grain in the Glen tank 10 is transported and discharged from the dredging spout 14 provided at the tip of the grain discharge conveyor 13 to a truck bed, a container, or the like.

  Further, on the machine body frame 6, a driving unit 15 on which an operator gets on is provided at a position in front of the grain storage unit 9, that is, a position on the right front part on the machine body frame 6. The operation unit 15 is covered with a cabin 16. The driving unit 15 is provided with a driving seat 17, a steering handle 18 disposed in front of the driving seat 17, a main transmission lever 21, an auxiliary transmission lever 22, a work clutch lever 23, and the like. The work clutch lever 23 is a work operation tool for turning on and off the threshing clutch 57 and the reaping clutch 75 (see FIG. 4). The main transmission lever 21, the auxiliary transmission lever 22, and the work clutch lever 23 are disposed in a lever column 24 provided on the left side of the driver seat 17.

  An engine 25 as a drive source is provided behind the grain storage unit 9 on the traveling machine body 2. The engine 25 is a diesel engine and is equipped with a diesel particulate filter (DPF) 26 that is an exhaust gas purification device. The DPF 26 collects particulate matter mainly composed of black smoke in the exhaust gas discharged from the engine 25. The engine 25 purifies the exhaust gas by passing the exhaust gas through the DPF 26.

  The cutting unit 3 will be described. The cutting unit 3 includes a feeder 30 as a conveying device, a grain header (platform) 31, a cutting blade device 32, a pair of left and right weed bodies 33, 33, and a take-up reel 34.

  The feeder 30 is a transport device that transports the cereals harvested by the reaping unit 3 and supplies them to the threshing unit 7. The feeder 30 includes a feeder house 35 as a housing and a conveyor 36 for conveying cereals provided in the feeder house 35. The feeder 30 is located on the left side of the cabin 16, and the rear end opening of the feeder house 35, which is configured in a substantially rectangular tube shape with the longitudinal direction in the plan view in the plan view, is connected to the front handling port 7 a of the threshing unit 7. It is provided in a state of communication.

  The grain header 31 is configured in a horizontally long bucket shape, and is connected to the front side of the feeder 30 so as to communicate with the front end opening of the feeder house 35. In the grain header 31, a take-up auger (platform auger) 37 is provided. The take-up auger 37 is rotatably mounted with the left-right direction as a rotation axis direction.

  The cutting blade device 32 is provided at the front lower end edge of the grain header 31 and has a clipper shape. The pair of left and right weed bodies 33, 33 are provided so as to protrude forward from the left and right side portions on the front side of the grain header 31. The take-up reel 34 is a reel with a tine bar, and is provided at a position above the front of the take-up auger 37. The take-up reel 34 is supported rotatably between the distal end portions of a pair of left and right reel support arms 34a and 34a whose base end portions are pivotally supported by the grain header 31, with the left-right direction being the rotation axis direction. The take-up reel 34 continuously acts on the culm landing portion while rotating, and rakes the culm landing portion toward the stirrer auger 37. The power of the engine 25 transmitted through various transmission mechanisms is used for the operation of each part of the cutting unit 3.

  The conveyor 36 in the feeder house 35 has a cutting input shaft (feeder house conveyor shaft) 38 that is provided at the front portion of the threshing portion 7 and has a horizontal direction as an axial direction as a drive shaft that pivotally supports the feed end side. The rear end portion of the feeder 30 is supported by a cutting input shaft 38 so as to be rotatable with the left-right direction as a rotation axis direction. An elevating cylinder 39 is interposed between the lower surface portion of the feeder house 35 and the body frame 6.

  The elevating cylinder 39 is a single-acting hydraulic cylinder that has a hydraulic action when it is extended. Therefore, the lifting cylinder 39 extends with the action of hydraulic pressure, so that the cutting unit 3 (feeder 30) rotates in the upward direction, and the hydraulic pressure of the lifting cylinder 39 is released, so that the cutting unit 3 ( As the feeder 30) is lowered by its own weight, the elevating cylinder 39 is shortened.

  With such a configuration, the cutting unit 3 is provided so as to move up and down using the cutting input shaft 38 as a rotation support shaft by the expansion and contraction operation of the lifting cylinder 39. That is, the rear end portion of the feeder 30 is rotatably supported on the traveling machine body 2 side of the combine 1 with the cutting input shaft 38 as a rotation axis. And the feeder 30 comprises the cutting part 3 with the cutting blade apparatus 32 provided in the front side, the pick-up reel 34, etc., and the cutting part 3 of the feeder 30 with respect to the traveling body 2 by the expansion-contraction operation | movement of the raising / lowering cylinder 39 is carried out. It is configured to move up and down by rotation. The raising and lowering operation of the feeder 30 is operated by a predetermined operation unit provided in the operation unit 15.

  The threshing unit 7 and the sorting unit 8 will be described. The threshing unit 7 includes a handling cylinder 41 provided in a handling chamber in which a handling opening 7 a is opened to the front side, and a receiving net 42 disposed below the handling cylinder 41. The handling cylinder 41 is rotatably supported by a handling cylinder shaft 41a whose axial direction is the front-rear direction. The handling cylinder 41 has a cylindrical main body portion with the handling shaft 41a along the central axis, and spiral blades are provided on the outer peripheral surface of the main body portion. On the upper side of the handling cylinder 41, a plurality of dust feeding valves for adjusting the conveying speed (residence time) of threshing in the handling chamber are provided so that the angle can be adjusted. The receiving net 42 is for letting down the grain, and is provided along the outer peripheral surface of the lower portion of the handling drum 41.

  The sorting unit 8 includes a swing sorting plate 43 serving as a swinging portion disposed below the receiving net 42, and a swing shaft 44a that swings the swing sorting plate 43 by rotational power from a driving source. It has a mechanism 44, a first conveyor 45, a second conveyor 46, and a tang 47. As shown in FIG. 4, a prefan 71 is provided in front of the tang 47 and a second fan 72 is provided behind the tang 47.

  The rocking sorter 43 has a specific gravity sorting configuration such as a feed pan, a chaff sheave arranged behind the feed pan to adjust the amount of grain leakage, and a grain sheave arranged below the chaff sheave. The first conveyor 45 is arranged in the first basket extending in the machine body width direction so as to collect the most grains. The second conveyor 46 is disposed in a second basket extending in the machine body width direction so as to collect the second grains at the position behind the first conveyor 45. The red pepper 47 blows a sorting wind that passes from the front lower side to the rear upper side with respect to the swing sorting board 43.

  A reduction conveyor 48 is provided on the left side of the machine body where the threshing unit 7 and the sorting unit 8 are disposed. The reduction conveyor 48 is connected to the second conveyor 46 with its lower end positioned in the vicinity of the second conveyor 46, and its upper end is positioned in the vicinity of the front end of the handling cylinder 41 so as to extend upwardly in a tilted manner. It is installed. Further, an upper conveyor 49 (see FIG. 4) extending in the left-right direction in front of the handling cylinder 41 is provided at the upper end portion of the reduction conveyor 48.

  The combine 1 having the above-described configuration is a harvested crop 3 with a desired height (a harvested crop) with respect to the ground by moving the feeder 30 up and down about the cutting input shaft 38 (support shaft) in the field. It rises until it reaches the cereal cutting height), and it changes from the non-working state to the working state, and travels by the traveling machine body 2 in that state. As a result, the combine 1 divides the harvested crop into the harvesting target and the non-harvesting target by the left and right weeds 33, 33, and the picking reel 34 rakes the landing part on the tip side of the harvested grain culm While the cutting blade device 32 is used, the dressing part of the cereal is cut off.

  The cedar landing part cut at the desired cutting position is scraped into the grain header 31 by the rotary auger 37 and is collected near the entrance of the feeder house 35 at the center of the left and right sides of the grain header 31. Then, the conveyor 36 in the feeder house 35 passes through the feeder house 35 and is fed into the handling port 7 a and is supplied to the threshing unit 7.

  The threshing part of the cereal meal supplied to the threshing unit 7 is threshed by the threshing unit 7. Specifically, the cereals supplied to the threshing unit 7 are threshed mainly between the handling cylinder 41 and the receiving net 42 while being conveyed rearward by the rotating handling cylinder 41. The threshing of grains or the like smaller than the mesh of the receiving net 42 leaks from the receiving net 42. The sawdust and the like that do not leak from the receiving net 42 are discharged to the field from the dust outlet provided at the rear part of the sorting unit 8 by the conveying action of the handling cylinder 41.

  On the other hand, the grain that has been threshed by the threshing unit 7 and leaked from the receiving net 42 is subjected to a sorting process by the sorting unit 8. Specifically, the threshing that has been threshed by the handling cylinder 41 and leaked from the receiving net 42 is a grain such as a refined grain by a specific gravity sorting action by the swing sorter 43 and a wind sorting action by the Kara 47. Sorted out into (first product), a mixture of grain and rice cake such as grain with branches (second product), and sawdust and the like.

  The grain (first thing) dropped from the rocking sorter 43 by sorting in the sorting unit 8 is conveyed to the glen tank 10 by the first conveyor 45 and a cereal conveyor (not shown) connected thereto. . The second product is returned to the threshing start end side of the handling cylinder 41 by the second conveyor 46 and the reduction conveyor 48 and the upper conveyor 49 connected thereto, and is subjected to the threshing process again. Sawdust and the like are discharged to the field from a dust outlet provided at the rear of the sorting unit 8.

  Next, the power transmission structure of the combine 1 which concerns on this embodiment is demonstrated using FIG. The combine 1 drives the cutting unit 3, the traveling unit 4, the threshing unit 7, the sorting unit 8, and the grain storage unit 9 by the rotational power of the engine 25.

  The rotational power of the output shaft 25 a of the engine 25 is transmitted to the first counter shaft 51 by a first belt transmission mechanism 52 provided between the output shaft 25 a and the first counter shaft 51. On the other hand, the rotational power of the engine 25 is transmitted via the auger clutch 53 to the grain storage unit 9 including various conveyors such as the lower discharge conveyor 11. The engine 25 includes a work machine pump shaft that drives a charge pump 54 that operates the lifting cylinder 39 and the like.

  The rotational power transmitted from the output shaft 25 a of the engine 25 to the first counter shaft 51 branches into a power transmission system to the threshing unit 7 and a power transmission system to the traveling unit 4, the sorting unit 8 and the cutting unit 3. .

  First, regarding the power transmission system to the threshing unit 7, the rotational power of the first counter shaft 51 is transmitted to the first rotor drive shaft 56 by the second belt transmission mechanism 55. The second belt transmission mechanism 55 is provided with a threshing clutch 57 that arbitrarily and intermittently transmits the rotational power of the first counter shaft 51 to the first rotor drive shaft 56.

  The rotational power of the first rotor drive shaft 56 is transmitted to the rotor drive shaft 59 via the threshing transmission 58, and the rotational power of the rotor drive shaft 59 is transmitted to the barrel shaft 41a via the third belt transmission mechanism 60. Is done. The threshing transmission 58 has a two-stage configuration having a high-speed gear train and a low-speed gear train, and is appropriately controlled according to the type of crop to be processed by a predetermined actuator under the control of the control device provided in the combine 1. Shifting operation is performed.

  With such a configuration, the driving force of the engine 25 is transmitted to the threshing unit 7. And by the operation of the work clutch lever 23, the threshing clutch 57 is turned ON / OFF, and the transmission of power to the threshing unit 7 is interrupted.

  Next, regarding the power transmission system to the traveling unit 4, the rotational power of the first counter shaft 51 is transmitted to the second counter shaft 62 by the fourth belt transmission mechanism 61. The rotational power of the second counter shaft 62 is transmitted to the HST input shaft 64 via the fifth belt transmission mechanism 63 and is input to the transmission 65 including the traveling HST and the turning HST by the HST input shaft 64. Here, “HST” is a hydraulic continuously variable transmission that employs a system in which hydraulic pressure generated by driving a hydraulic pump is converted again into rotational force by a hydraulic motor. The driving sprocket 5a of the crawler unit 5 constituting the traveling unit 4 is driven to rotate by the driving force of the transmission 65.

  Further, regarding the power transmission system to the sorting unit 8, the rotational power of the second counter shaft 62 is transmitted to the first PTO drive shaft 67 by the sixth belt transmission mechanism 66, and the rotational power of the first PTO drive shaft 67 is a gear or the like. Is transmitted to the second PTO drive shaft 69 through a transmission mechanism 68 including The rotational power of the second PTO drive shaft 69 is supplied to a prefan shaft 71a for rotating the prefan 71, a tang shaft 47a for rotating the tang 47, and a first conveyor shaft 45a for rotating the first conveyor 45 by a predetermined transmission mechanism. Each is transmitted. Further, the rotational power of the second PTO drive shaft 69 is transmitted to the swing shaft 44a of the swing mechanism 44 through the first conveyor shaft 45a. The rotational power of the first conveyor shaft 45a is transmitted to the second fan shaft 72a that rotates the second fan 72 by a predetermined transmission mechanism.

  The rotational power of the swing shaft 44a is transmitted to a second conveyor shaft 46a that rotates the second conveyor 46 by a predetermined transmission mechanism. The rotational power of the second conveyor shaft 46a is transmitted to the vertical conveyor shaft 48a that rotates the reduction conveyor 48 by a predetermined transmission mechanism, and the rotational power of the vertical conveyor shaft 48a is the lateral power that rotates the upper conveyor 49 by the predetermined transmission mechanism. It is transmitted to the conveyor shaft 49a.

  Then, regarding the power transmission system to the cutting unit 3, the rotational power of the second PTO drive shaft 69 is transmitted to the cutting input shaft 38 by the seventh belt transmission mechanism 73. The conveyor 36 in the feeder house 35 is operated by the rotational drive of the cutting input shaft 38. The seventh belt transmission mechanism 73 is provided with a cutting clutch 75 that arbitrarily and intermittently transmits the rotational power of the second PTO drive shaft 69 to the cutting input shaft 38. A pulley 73 a constituting the seventh belt transmission mechanism 73 is fixed to the right end portion of the cutting input shaft 38.

  The rotational power of the cutting input shaft 38 is transmitted to the PF drive shaft 77 by the first chain transmission mechanism 76. The rotational power of the PF drive shaft 77 is transmitted to the PF auger shaft 37 a that rotates the take-up auger 37 via the second chain transmission mechanism 78. The rotational power of the PF drive shaft 77 is transmitted to the cutting blade drive shaft 32 a that drives the cutting blade device 32 via the eighth belt transmission mechanism 80. Further, the rotational power of the PF drive shaft 77 is transmitted to the reel shaft 34 b that rotates the take-up reel 34 by a power transmission mechanism including the first reel counter shaft 81 and the second reel counter shaft 82.

  With such a configuration, the driving force of the engine 25 is transmitted to the cutting unit 3. Then, by operating the work clutch lever 23, the cutting clutch 75 is turned ON / OFF, and the transmission of power to the cutting unit 3 is interrupted.

  The combine 1 which concerns on this embodiment provided with the above structures is the conveyor 36 of the feeder 30 using the raising / lowering operation | movement of the feeder 30 in order to eliminate the clogging of the grain straw in the feeder 30 as a conveying apparatus by simple structure. Conveyor reverse direction operation mechanism unit for moving the reverse direction. That is, the combine 1 includes the feeder 30 in the cutting unit 3, and the feeder 30 is configured to be movable up and down about the cutting input shaft 38 as a rotation axis. The conveyor 36 is moved in the reverse direction by the lifting operation. Hereinafter, the conveyor reverse operation mechanism will be described with reference to FIGS.

  In the combine 1 according to the present embodiment, the feeder 30 includes a conveyor 36 having a cutting input shaft 38 that receives power transmitted in the left-right direction as an axial direction in a feeder house 35, and the main unit of the combine 1. On the other hand, it is provided so as to move up and down by turning around the cutting input shaft 38. That is, as described above, the feeder 30 is provided so as to move up and down around the cutting input shaft 38 by the expansion and contraction operation of the lifting cylinder 39 provided between the feeder house 35 and the machine body frame 6 ( See FIG. 5, arrow A1).

  The feeder house 35 has left and right side surface portions 91L and 91R, a lower surface portion 92, and an upper surface portion 93, and these surface portions constitute a cylindrical body having both front and rear openings. Specifically, the upper surface portion 93 has a rear side surface portion 93a and a front side surface portion 93b each having an inclined flat surface, and has a bent surface shape with the front and rear central portions as top portions in a side view. Corresponding to the bent surface shape of the upper surface portion 93, the left and right side surface portions 91 </ b> L and 91 </ b> R have a mountain shape at the top.

  In such a feeder house 35, a substantially horizontally elongated rectangular opening is formed at the rear end portion by the rear end portions of the left and right side surface portions 91L and 91R, the lower surface portion 92, and the rear surface portion 93a of the upper surface portion 93. A portion 94 is formed (see FIG. 8). Further, the front end of the lifting cylinder 39 is supported by the shaft support portion 39a so as to be rotatable with the left-right direction as the rotation axis direction with respect to the front portion of the lower surface portion 92 of the feeder house 35.

  The conveyor 36 is a chain conveyor having a chain 95 provided in parallel with each other on the left and right sides in the feeder house 35 and a plurality of plates 96 installed between the left and right chains 95. The plate 96 is provided on the outer peripheral side of the chain 95. The plate 96 is an elongated member whose longitudinal direction is the installation direction (left-right direction) between the left and right chains 95, and is a bent plate-like member having a crank-like or substantially “U” -shaped cross-sectional shape. The plate 96 is fixed to the chain 95 with fasteners such as bolts. In the present embodiment, 15 plates 96 are attached to the chain 95 at a predetermined interval in the longitudinal direction of the chain 95.

  The conveyor 36 has a rear portion of a chain 95 on a sprocket 97 provided to rotate integrally with the cutting input shaft 38 on both the left and right sides of a construction portion in the feeder house 35 of the cutting input shaft 38 which is a drive shaft thereof. Wrap around. On the other hand, the front portion of the chain 95 is wound around a cylindrical front drum 98 provided at the front end in the feeder house 35. The front drum 98 is pivotally supported between a left and right side surface portion 91L, 91R of the feeder house 35 so as to be rotatable about a conveyor driven shaft 98a which is a predetermined rotation axis whose axial direction is the left-right direction. That is, the chain 95 is wound endlessly around the sprocket 97 and the front drum 98, and the plate 96 is moved while maintaining the winding state by the rotation of the sprocket 97 accompanying the rotation of the cutting input shaft 38. To drive. The conveyor 36 is provided so that the rear end portion of the sprocket 97 protrudes from the rear opening portion 94 of the feeder house 35 and the front end portion of the front drum 98 slightly protrudes from the front opening portion of the feeder house 35. Yes.

  With such a configuration, the conveyor 36 is driven in the forward rotation direction when the cutting input shaft 38 rotates counterclockwise (left rotation direction) when viewed from the left side (see arrow B1 in FIG. 6) (FIG. 6). , Refer to arrow B2), the cereal grains taken into the feeder house 35 by the take-up auger 37 are hooked on the plate 96 and conveyed obliquely rearward and upward. That is, when the conveyor 36 is driven in the forward rotation direction, the path portion of the linear chain 95 positioned below the sprocket 97 and the front drum 98 (the chain 95 positioned directly above the lower surface portion 92 of the feeder house 35). The path portion) is the forward path portion that moves from the front side to the rear side, and the path portion of the linear chain 95 that is located above the sprocket 97 and the front drum 98 is the return path portion that moves from the rear side to the front side. The cereals conveyed by the conveyor 36 are supplied from the feeder house 35 to the threshing unit 7 through the handling port 7a (see FIG. 1).

  The cutting input shaft 38 is installed between the left and right side surface portions 91L and 91R at the rear end portion of the feeder house 35 and protrudes from the side surface portions 91L and 91R to the left and right outer sides. The cutting input shaft 38 is provided so as to be rotatable relative to the feeder house 35 via a bearing member or the like. The both ends of the cutting input shaft 38 are rotatably supported via bearing members or the like on support brackets 100 (100L, 100R) provided on the left and right sides of the rear end of the feeder house 35, respectively. .

  The support bracket 100 is a member having a vertical direction as a longitudinal direction, a bent plate-like base portion having a substantially “L” shape in plan view by the fixed surface portion 101 and the support surface portion 102, and an inner side of the bent shape of the base portion. And a plurality of horizontal plate-like rib portions 103. The support bracket 100 has a fixed surface portion 101, which is a flat plate portion forming one side in a substantially “L” -shaped plan view shape, at the base portion thereof, and also has a substantially “L” -shaped plan view shape. The support surface portion 102 which is a flat plate portion forming the other side is provided in a state where the left and right inner sides are directed.

  The left and right support brackets 100L and 100R have the support surface portion 102 along the outer surfaces of the side surface portions 91L and 91R of the feeder house 35 on both the left and right outer sides of the feeder house 35, and the support surface portions 102 face each other. They are arranged so as to be substantially symmetrical with each other. That is, the left and right support brackets 100 </ b> L and 100 </ b> R are provided in such a manner that the rear end portion of the feeder house 35 is sandwiched between the support surface portions 102 from both the left and right sides.

  The support bracket 100 is provided in a state of being fixed to the main unit side of the combine 1. Specifically, the support bracket 100 is fixed to left and right support columns 105 (105L, 105R) provided on the main unit side of the combine 1. The struts 105 are members constituting the machine frame of the main unit of the combine 1, and are erected at two places on the left and right sides on the traveling machine body 2 in front of the threshing unit 7. The left support bracket 100L is fixed to the upper front side of the left column 105L, and the right support bracket 100R is fixed to the upper front side of the right column 105R.

  The support bracket 100 is fixed to the column 105 with a plurality of fastening members 106 such as bolts penetrating the fixed surface 101 from the front side in a state where the fixed surface 101 is in contact with the front surface of the column 105. In the present embodiment, each support bracket 100 is fixed to the support column 105 by four fastening members 106 arranged at predetermined intervals in the vertical direction.

  As described above, the feeder 30 is supported so as to be rotatable up and down about the support bracket 100 fixed to the support column 105 which is the configuration on the main unit side of the combine 1 with the horizontal direction as the axial direction. That is, the feeder 30 is provided so as to move up and down with respect to the main body side with the cutting input shaft 38 as a rotation axis in a state where the rear end portion is sandwiched from the left and right by the left and right support brackets 100L and 100R. Yes.

  Further, a cutting position sensor 107 that detects the cutting height (the height of the cutting unit 3 with respect to the machine) from the rotation angle of the feeder house 35 is provided in front of the upper portion of the left support bracket 100L. The cutting position sensor 107 is attached to a sensor support stay 108 provided in front of the fixed surface portion 101 of the support bracket 100L, and is supported on the machine side. The sensor support stay 108 is connected to the two fastening members via cylindrical sleeve bodies 106a that respectively penetrate the upper two fastening members 106 among the four fastening members 106 that fix the support bracket 100L to the machine side. The member 106 is fixedly supported.

  The cutting position sensor 107 includes a detection piece 107a that is provided so as to be rotatable about the left-right direction as an axial direction and protrudes forward. On the other hand, a bar-like detection pin 109 that acts on the detection piece 107a is projected from the left side surface portion 91L of the feeder house 35. The detection pin 109 is positioned on the upper side of the detection piece 107a, and acts on the detection piece 107a within a predetermined operation range in the raising / lowering operation of the feeder 30 to rotate the detection piece 107a. With such a configuration, the cutting position sensor 107 detects the cutting height based on the amount of rotation of the detection piece 107 a that receives the action of the detection pin 109 during the lifting and lowering operation of the feeder 30.

  The combine 1 having the above-described configuration is configured such that the lifting operation of the feeder 30 is applied to the cutting input shaft 38 as a conveyor reverse operation mechanism unit that moves the conveyor 36 of the feeder 30 in the reverse direction by using the lifting and lowering operation of the feeder 30. In response to the ascending operation of the feeder 30, the cutting input shaft 38 is rotated in the reverse direction (hereinafter referred to as “forward direction”) when the grain input is carried (when the conveyor 36 is driven in the forward direction). A reversing mechanism 110 that rotates in the “reversing direction”). That is, in a state where the feeder 30 is lowered from the ascending end position of the raising / lowering operation, the feeder house 35 and the cutting input shaft 38 are engaged with each other by the reversing mechanism 110, and the forward rotation direction of the cutting input shaft 38 with respect to the feeder house 35 is determined. Is in a state in which the relative rotation is restricted. In this state, when the feeder 30 is raised, the cutting input shaft 38 rotates in the reverse direction together with the feeder house 35.

  In detail, according to the reverse rotation mechanism 110, the following operation is obtained. The cutting input shaft 38 is supported on the main unit side of the combine 1 via the left and right support brackets 100 as described above, and is provided so as to be rotatable relative to the feeder house 35. As will be described later, the gear 120 which is a member constituting the reverse rotation mechanism 110 is supported by the cutting input shaft 38, and the claw member 130 which is also a member constituting the reverse rotation mechanism 110 is supported by the feeder house 35 side. ing.

  For this reason, when the feeder 30 is lifted and rotated about the cutting input shaft 38 as a rotation center in a state where the relative rotation of the cutting input shaft 38 in the normal rotation direction with respect to the feeder house 35 is restricted by the reversing mechanism 110, the feeder 30. The cutting input shaft 38 is forcibly rotated in the reverse direction together with the feeder house 35 by the amount of the upward rotation amount. That is, the upward rotation direction of the feeder house 35 (see the arrow C1 in FIG. 6) is the forward rotation direction of the cutting input shaft 38 (see the arrow C2 in FIG. 6) which is clockwise (right rotation direction) when viewed from the left side. The cutting input shaft 38 engaged with the feeder house 35 by the reverse rotation mechanism 110 is rotated in the reverse rotation direction integrally with the feeder house 35 that is rotated upward.

  Therefore, the reverse rotation mechanism 110 that rotates the harvesting input shaft 38 in the reverse rotation direction by using the lifting / lowering operation of the feeder 30 may be any configuration as long as the above-described engaging action on the harvesting input shaft 38 is obtained. That is, as the reverse rotation mechanism 110, in a configuration in which the cutting input shaft 38 supported on the machine side rotates relative to the feeder house 35, the relative rotation of the cutting input shaft 38 is at least relative to the forward rotation direction. Any structure may be used as long as it has an effect of restricting the rotation. Hereinafter, a specific configuration of the reverse rotation mechanism 110 according to the present embodiment will be described.

  As shown in FIGS. 5 to 8, the reverse rotation mechanism 110 is provided on the left side which is the outer side of the main unit of the combine 1 in the left and right sides of the feeder house 35. That is, in this embodiment, the feeder 30 is provided on the left side of the cabin 16, and the left side of the feeder house 35 is the left and right outside of the main unit of the combine 1, and the left side of the rear end portion of the feeder house 35. On the other hand, a reverse rotation mechanism 110 is provided.

  The reverse rotation mechanism 110 includes a gear 120 as a first engagement member supported by the cutting input shaft 38 and a claw member 130 that engages with the gear 120. The reversing mechanism 110 includes a ratchet mechanism that restricts the raising / lowering operation of the feeder 30 that rotates the cutting input shaft 38 via the gear 120 to the raising operation of the feeder 30.

  The gear 120 is supported by a protruding portion 38 a of the cutting input shaft 38 that protrudes leftward from the feeder house 35. The gear 120 is an annular plate-like member that penetrates the cutting input shaft 38, and has a plurality of teeth 121 on the outer peripheral side of the main body portion that is the inner peripheral side portion thereof. The teeth 121 have a mountain shape that is substantially triangular when viewed in the direction of the rotation axis of the gear 120. Between the teeth 121 adjacent to each other in the circumferential direction of the gear 120, an engagement concave portion 122 having a substantially “V” shape as viewed in the rotation axis direction of the gear 120 is formed.

  The claw member 130 is provided in a state of being supported by the feeder 30, and transmits the raising operation of the feeder 30 to the cutting input shaft 38 via the gear 120 by engaging with the gear 120. The claw member 130 is provided at a position in front of the gear 120 on the left side of the feeder house 35. The claw member 130 is a plate-like member having a predetermined shape portion, and is provided so as to be rotatable with the plate thickness direction as the left-right direction. The claw member 130 has a plate thickness that is substantially the same as or thinner than that of the gear 120, and is provided at a position that is substantially the same as the gear 120 so that the claw member 130 can engage with the gear 120 ( (See FIG. 7).

  The claw member 130 is provided in a state of being rotatably supported with respect to the left side surface portion 91 </ b> L of the feeder house 35 constituting the feeder 30. The claw member 130 is rotatably supported by a support shaft 131 that protrudes leftward from the side surface portion 91L and that has the left-right direction as the axial direction.

  The support shaft 131 is a cylindrical portion, and a protruding tip portion is a reduced diameter portion 131a. The reduced diameter portion 131a is penetrated through the claw member 130. The reduced diameter portion 131a has a retaining ring 135b via a washer 135a. By receiving the fitting, the claw member 130 is rotatably supported. Further, the support shaft 131 is supported by a reinforcing support stay 136 provided between the support shaft 131 and the side surface portion 91L on the lower front side.

  The claw member 130 includes a support base portion 132 that is a support portion by the support shaft 131 and penetrates the support shaft 131, and a claw body portion 133 that protrudes upward from the support base portion 132. The support base 132 has a shape protruding around the support shaft 131, and a claw body 133 is provided on the upper side of the support base 132. The claw body part 133 has a shape bent from the upper side to the rear side of the support base part 132, and has a sharp engagement part 134 that forms an acute angle toward the rear side where the gear 120 is located. The claw member 130 is engaged with the gear 120 by fitting the sharp engagement portion 134 into the engagement recess 122 of the gear 120. The sharp engagement portion 134 has an outer shape corresponding to the substantially “V” -shaped concave shape of the engagement recess 122 so as to fit the engagement recess 122.

  With such a configuration, the claw member 130 rotates in the clockwise direction (right rotation direction) when viewed from the left side, so that the sharp engagement portion 134 is engaged with the engagement recess 122 located on the front side of the gear 120. And engage with the gear 120. On the other hand, when the claw member 130 engaged with the gear 120 rotates counterclockwise (left rotation direction) in the left side view, the engagement of the claw member 130 with the gear 120 is released.

  The claw member 130 is urged by a spring 140 as an urging member in a direction in which it engages with the gear 120, that is, in a right rotation direction (hereinafter referred to as “engagement direction”) when viewed from the left side. The spring 140 is a tension coil spring, and applies an action of pulling the claw member 130 to the claw member 130 in the engaging direction. The spring 140 is provided on the lower rear side (the lower right side in FIG. 10) with respect to the claw member 130. By pulling the rear part of the claw member 130 downward, the claw member 130 is engaged by elastic force. Energize in the opposite direction.

  Specifically, the spring 140 has a hook pin 140a at the upper end side that is one end side of the spring 140, and a locking pin 141 that passes through a rear side portion (right side in FIG. 10) of the support portion by the support shaft 131 of the claw member 130. Is locked. A hook portion 140a on the upper end side of the spring 140 is hooked on a protruding portion of the locking pin 141 penetrating the claw member 130 toward the right side (the rear side in FIG. 10).

  On the other hand, the hook portion 140b on the lower end side, which is the other end side of the spring 140, is locked to a support stay 142 fixed to the side surface portion 91L of the feeder house 35 by welding or the like. The support stay 142 is provided at a position below the claw member 130. The support stay 142 forms a bent plate-like portion having a predetermined bent shape protruding leftward from the side surface portion 91L, and includes a horizontal plate portion 142a that follows the downward slope of the feeder house 35, and a rear plate portion 142a. A vertical plate portion 142b that is bent upward from the edge portion at a right angle to the horizontal plate portion 142a.

  With respect to such a support stay 142, the spring 140 is locked and supported by the support stay 142 in a state where the lower hook portion 140b is passed through the locking hole 142c formed in the vertical plate portion 142b. .

  Further, the rotation operation around the support shaft 131 of the claw member 130 is operated via an operation wire 145 as a wire member coupled to the claw member 130. One end side of the operation wire 145 is coupled to the claw member 130 via the coupling member 146. The connecting member 146 is a long member having a substantially “U” shape that is substantially rectangular in a side view and open upward in a front view, and an upper end portion of the connecting member 146 is supported by a support shaft 131 of the claw member 130. Is connected to a locking pin 147 penetrating the front side portion (left side in FIG. 10). The upper end portion of the connecting member 146 is connected to a protruding portion to the right side (the back side in FIG. 10) of the locking pin 147 that penetrates the claw member 130. The locking pin 147 passes through a long hole 146a formed along the longitudinal direction of the connecting member 146, and is supported by the connecting member 146 after receiving the penetration of the pin. Thereby, the connecting member 146 is provided so as to be movable relative to the locking pin 147 along the longitudinal direction of the long hole 146a. On the other hand, one end of the operation wire 145 is connected to the lower end of the connecting member 146.

  The operation wire 145 extends through the tubular wire support member 148 fixedly supported by the horizontal plate portion 142 a of the support stay 142 and is covered with a flexible covered tube 149. The wire support member 148 is fixedly supported on the horizontal plate portion 142a by a fastening action or the like by a nut member in a manner of vertically penetrating the horizontal plate portion 142a. The other end side of the operation wire 145 is connected to a predetermined operation tool via a member constituting a predetermined link mechanism (link mechanism 300) described later so that the other end side of the operation wire 145 is operated by a predetermined operation tool provided in the operation unit 15. It is connected.

  In the claw member 130, the locking pin 141 for locking the spring 140 to the claw member 130 and the locking pin 147 for connecting the operation wire 145 to the claw member 130 are supported at a position supported by the support shaft 131. It is located on the substantially opposite side between the front and rear. That is, the locking pin 141 for the spring 140 is positioned behind the support shaft 131, and the locking pin 147 for the operation wire 145 is positioned in front of the support shaft 131.

  Further, between the claw member 130 and the support stay 142, the erection direction (extension / contraction direction) of the spring 140 and the extension direction of the operation wire 145 are both substantially forward and downward directions. The claw member 130 is always subjected to a downward pulling action by the spring 140, and rotates like a seesaw back and forth about the support shaft 131 depending on the presence or absence of the downward pulling action by the operation wire 145.

  The operation of the reverse rotation mechanism 110 will be described with reference to FIG. Normally, as shown in FIG. 10, the reverse rotation mechanism 110 is not operated, and the claw member 130 is in a direction opposite to the engagement direction from a rotation position where the claw member 130 is engaged with the gear 120 (hereinafter referred to as “engagement position”). (Hereinafter referred to as “counter-engagement direction”). That is, the reverse rotation mechanism 110 is in an inoperative state, and the cutting input shaft 38 is in an unengaged state with respect to the feeder house 35. The state in which the claw member 130 is in the non-engagement position is held by the pulling action of the operation wire 145 that pulls the claw member 130 in the anti-engagement direction against the biasing action of the spring 140 in the engagement direction.

  Then, an operation for bringing the reversing mechanism 110 into an operating state is performed by operating a predetermined operation tool that operates the operation wire 145, whereby the pulling action of the claw member 130 by the operation wire 145 is released. As a result, the claw member 130 is rotated in the engagement direction by the urging force of the spring 140 (see arrow D1), the claw member 130 reaches the engagement position, and the sharp engagement portion 134 is located on the front side of the gear 120. The claw member 130 is engaged with the gear 120 by fitting into the engaging recess 122. That is, the reverse rotation mechanism 110 is activated, and the cutting input shaft 38 is engaged with the feeder house 35.

  The operation wire 145 is pulled by performing an operation for deactivating the reverse rotation mechanism 110 by operating a predetermined operation tool from the operation state of the reverse rotation mechanism 110. As a result, the claw member 130 rotates in the anti-engagement direction (the direction opposite to the arrow D1) against the urging force of the spring 140, the engagement of the claw member 130 with the gear 120 is released, and the claw member 130 is not engaged. The engagement position is reached and the reverse rotation mechanism 110 returns to the inoperative state.

  In the connection structure of the operation wire 145 to the claw member 130, play is provided in the direction of operation of the operation wire 145 due to the structure in which the locking pin 147 is engaged with the elongated hole 146a of the connection member 146. As a result, unintentional engagement of the claw member 130 with the gear 120 is prevented, and the switching operation of the reversing mechanism 110 can be reliably switched between the operating state and the non-operating state.

  Further, regarding the engagement structure between the gear 120 and the claw member 130, the reverse rotation mechanism 110 is the reverse rotation direction of the conveyor 36 with respect to the feeder house 35 of the gear 120 in a state where the claw member 130 is engaged with the gear 120 (operation state). Is a ratchet type structure in which relative rotation in the right rotation direction in the left side view is allowed. That is, the teeth 121 of the gear 120 are arranged so that the direction of relative rotation of the gear 120 with respect to the feeder house 35 is limited to the direction corresponding to the rotation of the cutting input shaft 38 in the reverse direction when the reverse rotation mechanism 110 is in operation. The circumferential direction of 120 is inclined to the forward rotation direction side of the conveyor 36 with respect to the radial direction of the gear 120 (left rotation direction side in the left side view).

  According to such a configuration, for example, due to the clogging action of the cereals in the feeder house 35, a state in which the cutting input shaft 38 rotates integrally with the feeder house 35 as the feeder house 35 moves up and down occurs. In some cases, the reverse operation mechanism 110 is activated, and the following effects are obtained. That is, during the raising operation of the feeder 30, the gear 120 rotates in a direction (reverse direction) corresponding to the reverse direction of the conveyor 36 along with the ascending feeder house 35. On the other hand, when the feeder 30 is lowered, relative rotation of the gear 120 with respect to the feeder house 35 is allowed. Here, the direction of relative rotation of the gear 120 is the reverse direction. In other words, the relative rotation of the gear 120 with respect to the feeder house 35 is allowed during the lowering operation of the feeder house 35, so that the cutting input shaft 38 rotates relative to the feeder house 35 in the reverse direction via the gear 120. It will be. Thus, according to the ratchet structure including the gear 120 and the claw member 130, the lifting / lowering operation of the feeder 30 that rotates the cutting input shaft 38 via the gear 120 is limited to the lifting operation of the feeder 30.

  Therefore, in the operating state of the reverse rotation mechanism 110, the gear 120 rotates in the reverse rotation direction integrally with the feeder house 35 when the feeder 30 is raised, and relatively with respect to the feeder house 35 when the feeder 30 is lowered. It will be. That is, an action of rotating the cutting input shaft 38 in the reverse direction via the gear 120 is obtained both when the feeder 30 is raised and lowered. For this reason, when the feeder 30 repeats the raising / lowering operation, an action of rotating the cutting input shaft 38 in the reverse rotation direction can be obtained for each raising / lowering operation.

  As described above, the reverse rotation mechanism 110 according to the present embodiment includes the gear 120 that is pivotally supported by the cutting input shaft 38 and the claw member 130 that is biased in a direction (engagement direction) in which the gear 120 is engaged. And includes a ratchet mechanism that restricts the raising / lowering operation of the feeder 30 that rotates the cutting input shaft 38 via the gear 120 to the raising operation of the feeder 30.

  According to the reverse rotation mechanism 110 of the present embodiment as described above, when the feeder 30 is raised and rotated in the operating state of the reverse rotation mechanism 110, the gear supported by the cutting input shaft 38 by the amount of rotation of the feeder 30. About 120, the rotation effect | action to the direction corresponding to the reverse rotation direction of the cutting input shaft 38 is obtained. The rotational action of the gear 120 in the reverse direction is used, and the cutting input shaft 38 rotates in the reverse direction. Thereby, the conveyor 36 operates in the reverse direction, and the clogging of the cereals in the feeder 30 is eliminated.

  Here, for example, when the gear 120 is fixed coaxially with the cutting input shaft 38, that is, when the gear 120 is configured to rotate integrally with the cutting input shaft 38, the gear according to the rise of the feeder 30. The rotation amount of 120 in the reverse rotation direction is 1: 1 and is transmitted to the cutting input shaft 38, and the conveyor 36 operates in the reverse rotation direction. On the other hand, in such a configuration, since the operation stroke of the raising / lowering operation of the feeder 30 is limited, the clogging of the cereal is eliminated with respect to the rotation amount of the cutting input shaft 38 that operates the conveyor 36 in the reverse direction. Therefore, there is a possibility that a sufficient amount of rotation cannot be obtained.

  Therefore, the combine 1 according to the present embodiment includes an amplifying mechanism 200 that amplifies the amount of rotation of the gear 120 that rotates by receiving the ascending operation of the feeder 30 via the claw member 130 and transmits the amplified amount to the cutting input shaft 38. Prepare. The amplification mechanism 200 will be described with reference to FIGS.

  As shown in FIG. 12, the cutting input shaft 38 is a cylindrical shaft that allows the cutting input shaft 38 to pass through the left side surface portion 91L of the feeder house 35 and the support bracket 100L positioned on the left side of the side surface portion 91L. A support member 201 is rotatably supported.

  The shaft support member 201 has a flange portion 201a which is a diameter-expanded portion at a portion closer to the right side, and the right end portion is fitted into a shaft support hole 91a formed in the side surface portion 91L, and the flange portion 201a is connected to the side surface portion. It is along the outer side (left side) of 91L. The shaft support member 201 is fixed to the side surface portion 91L at a plurality of locations by fixing bolts 202 that penetrate the side surface portion 91L from the inside of the side surface portion 91L.

  Further, the shaft support member 201 has a cylindrical portion on the left side of the flange portion 201a fitted in a shaft support hole 100a formed in the support bracket 100L so as to be relatively rotatable. The shaft support member 201 penetrates the protruding portion 38a on the left side from the side surface portion 91L of the cutting input shaft 38, and can relatively rotate the cutting input shaft 38 via a bearing member 203 fixed to the cutting input shaft 38. I support it. Further, a bearing 204 is interposed between the right end portion of the shaft support member 201 and the cutting input shaft 38.

  The cutting input shaft 38 has a left end protruding leftward from the support bracket 100L, and the gear 120 is supported by the protruding portion 38a. The gear 120 is provided at a position close to the left side with respect to the support bracket 100L. The amplifying mechanism 200 amplifies the amount of rotation of the gear 120 as the feeder 30 moves up and transmits it to the cutting input shaft 38 in the operating state of the reverse rotation mechanism 110.

  The amplifying mechanism 200 includes an input shaft side gear supported by the cutting input shaft 38, an idler shaft 215 as a transmission shaft provided in parallel with the cutting input shaft 38, and an input shaft side gear supported by the idler shaft 215. And a transmission shaft side gear. In this embodiment, as shown in FIGS. 11 to 13, the amplifying mechanism 200 has a first gear 211 and a fourth gear 214 as input shaft side gears, and a second gear 212 and a transmission shaft side gear. A third gear 213 is provided.

  As shown in FIG. 12, the first gear 211 is provided at a position adjacent to the left side of the gear 120. The first gear 211 is supported so as to be relatively rotatable with respect to the cutting input shaft 38 via two bearings 216 and 216 adjacent to each other in the axial direction. The first gear 211 supports the gear 120 penetrating the cutting input shaft 38 coaxially with the axis of the cutting input shaft 38 so as to rotate integrally with the gear 120.

  The first gear 211 has a support cylinder portion 211a that protrudes in a cylindrical shape from the right side so as to be spaced apart from the outer peripheral surface of the cutting input shaft 38 by a predetermined distance. The first gear 211 is fixed to the gear 120 with fixing bolts 217 in a state where the support cylinder portion 211a is inserted into the inner peripheral hole 120a of the gear 120 from the left side. The fixing bolt 217 passes through a bolt hole 211 b formed in the first gear 211 from the left side and is screwed into the main body portion of the gear 120. Fixing portions by the fixing bolts 217 are provided at a plurality of locations (six locations in the present embodiment) at regular intervals around the axis of the cutting input shaft 38. The outer diameters of the first gear 211 and the gear 120 are substantially the same.

  The idler shaft 215 is provided on the left side of the side surface portion 91 </ b> L of the feeder house 35 with the axial direction being the left-right direction at a position below the cutting input shaft 38. The idler shaft 215 has substantially the same length as the protruding portion 38a to the left from the side surface portion 91L of the cutting input shaft 38.

  The right end, which is one end of the idler shaft 215, is rotatably supported by a lower shaft support hole 100b formed in the support bracket 100L via a bearing 218. On the other hand, the left end, which is the other end side of the idler shaft 215, is supported by a lower portion of the construction support plate 220 that supports the left end of the cutting input shaft 38.

  The erection support plate 220 has a short cylindrical bearing support part 220a having a cylinder axis direction in the left-right direction at the lower part thereof, and a left end of the idler shaft 215 via the bearing 221 in the bearing support part 220a. The part is supported rotatably. The erection support plate 220 is a plate-like member having a substantially chamfered rectangular shape whose longitudinal direction is the longitudinal direction when viewed from the side, and supports the left end portions of the cutting input shaft 38 and the idler shaft 215, respectively. It is provided in a state of being laid between the left end portions of these shafts.

  In the idler shaft 215, a second gear 212 that meshes with the first gear 211 is provided at a position corresponding to the first gear 211 in the axial direction. The second gear 212 is fixed to the idler shaft 215 by welding or the like, and rotates integrally with the idler shaft 215. The second gear 212 has a smaller diameter than the first gear 211 and functions as a pinion with respect to the first gear 211.

  In the present embodiment, the number of teeth of the first gear 211 is 38, and the number of teeth of the second gear 212 is 19. That is, the gear ratio between the first gear 211 and the second gear 212 is ½, and the speed increase ratio is 2 with respect to the transmission of rotation from the first gear 211 to the second gear 212.

  A third gear 213 is provided on the left side of the second gear 212 on the idler shaft 215. Similar to the second gear 212, the third gear 213 is fixed to the idler shaft 215 by welding or the like, and rotates integrally with the idler shaft 215. The third gear 213 is a gear having a larger diameter than the second gear 212. In the present embodiment, the number of teeth of the third gear 213 is 38.

  In the cutting input shaft 38, a fourth gear 214 that meshes with the third gear 213 is provided at a position corresponding to the third gear 213 in the axial direction. The arrangement position of the third gear 213 is a position substantially adjacent to the left side of the first gear 211. The fourth gear 214 is cut by a parallel key 222 fitted in a key groove formed along the axial direction of the cutting input shaft 38 on each of the outer peripheral surface of the cutting input shaft 38 and the inner peripheral surface of the fourth gear 214. It is provided so as not to rotate relative to the input shaft 38 and rotates integrally with the cutting input shaft 38. The fourth gear 214 has a smaller diameter than the third gear 213 and functions as a pinion with respect to the third gear 213.

  In the present embodiment, the number of teeth of the fourth gear 214 is 19 with respect to the third gear 213 of 38 teeth. That is, the gear ratio between the third gear 213 and the fourth gear 214 is ½, and the speed increase ratio is 2 with respect to transmission of rotation from the third gear 213 to the fourth gear 214.

  Further, the left end portion of the cutting input shaft 38 is supported by the upper portion of the erection support plate 220 via the fourth gear 214. The fourth gear 214 has a cylindrical support cylinder portion 214a through which the cutting input shaft 38 is penetrated together with the main body portion on the left side of the main body portion where teeth that mesh with the third gear 213 are formed on the outer peripheral side. On the other hand, the erection support plate 220 has a short cylindrical bearing support part 220b with the left-right direction as the cylinder axis direction at the upper part thereof, and the fourth gear 214 is inserted into the bearing support part 220b via the bearing 223. A portion of the support cylinder 214a is rotatably supported. That is, the left end portion of the cutting input shaft 38 is rotatably supported by the upper portion of the construction support plate 220 via the fourth gear 214 and the bearing 223.

  The cutting input shaft 38 has a left end portion on which the male screw portion 38 b is formed protruding leftward from the installation support plate 220. The protruding portion of the cutting input shaft 38 from the erection support plate 220 is screwed with a nut 255 to the male screw portion 38b via a locking portion 224 made of a washer, a retaining ring or the like that penetrates the cutting input shaft 38. It is supported.

  According to the amplification mechanism 200 as described above, in the operating state of the reverse rotation mechanism 110, the rotation of the gear 120 that rotates in the reverse rotation direction in response to the transmission of the raising operation of the feeder 30 via the claw member 130 is the gear 120. The first gear 211 that rotates relative to the cutting input shaft 38 is integrally rotated. The rotation of the first gear 211 is transmitted to the idler shaft 215 via the second gear 212 meshed therewith. Here, due to the speed increasing ratio of the first gear 211 and the second gear 212, the amount of rotation of the first gear 211 is increased and transmitted to the idler shaft 215. In the present embodiment, as described above, the speed increasing ratio between the first gear 211 and the second gear 212 is 2, and the rotation amount of the first gear 211 is doubled and transmitted to the idler shaft 215.

  The rotation of the idler shaft 215 is transmitted to the cutting input shaft 38 via the third gear 213 that rotates integrally with the idler shaft 215 and the fourth gear 214 that meshes with the third gear 213. Here, due to the speed increasing ratio of the third gear 213 and the fourth gear 214, the amount of rotation of the third gear 213 is increased and transmitted to the fourth gear 214. Since the fourth gear 214 rotates integrally with the cutting input shaft 38, the rotation amount of the fourth gear 214 becomes the rotation amount of the cutting input shaft 38 as it is. In the present embodiment, as described above, the speed increasing ratio between the third gear 213 and the fourth gear 214 is 2, the amount of rotation of the third gear 213 is doubled, and the cutting input shaft is connected via the fourth gear 214. 38.

  Thus, according to the amplifying mechanism 200, the rotation of the gear 120 integrated with the feeder 30 in the reverse rotation direction in the operating state of the reverse rotation mechanism 110 is the first gear 211 → second gear 212 → idler shaft 215 → third. The speed is increased by the flow of the gear 213 → the fourth gear 214 → the cutting input shaft 38 and transmitted as the rotation of the cutting input shaft 38 in the reverse direction. In this embodiment, the amount of rotation of the gear 120 is increased in two stages by the speed increasing ratio between the first gear 211 and the second gear 212 and the speed increasing ratio between the third gear 213 and the fourth gear 214. As a result, the amount of rotation is four times as large, and is transmitted to the cutting input shaft 38. Note that the number of gears, the number of teeth of each gear, the speed increase ratio between gears, and the like in the amplification mechanism 200 are not particularly limited to the configuration of the present embodiment.

  Further, in the amplifying mechanism 200, as described above, the erection support plate 220 that supports the left end portions of the reaping input shaft 38 and the idler shaft 215 is bent and formed at the rear portion thereof so as to be bent inward (right side) at a substantially right angle. It has the surface part 220c. That is, the erection support plate 220 is a portion that supports the left end of each of the cutting input shaft 38 and the idler shaft 215 and has a plate-like plate main body portion 220d that has a plate thickness direction in the left-right direction and a plate thickness in the front-back direction. It has a plate-like support surface portion 220c as a direction, and has a substantially “L” shape in plan view.

  The erection support plate 220 is provided so that the support surface 220c is brought into contact with or substantially in contact with the front side of the left column 105L on the machine side. In the erection support plate 220, the rear support surface portion 220c has a rear surface 220e as a contact surface with the front surface of the left column 105L, and serves as a support portion for the column 105L.

  In other words, in the operating state of the reverse rotation mechanism 110, the cutting input shaft 38 receives an action from the front side to the rear side via the claw member 130 and the gear 120 as the feeder 30 rises. That is, the cutting input shaft 38 tries to escape backward. Therefore, by using the support surface portion 220c of the support plate 220 that supports the left end portion of the cutting input shaft 38 as a supporting portion for the support column 105L, the movement of the cutting input shaft 38 to the rear is restricted, and the rear of the cutting input shaft 38 is controlled. Escape to is prevented. Thereby, it is possible to obtain a stable engagement state with respect to the engagement of the claw member 130 with the gear 120.

  Further, in the amplifying mechanism 200, the cutting input shaft 38 and the idler shaft 215 are caused by the reaction force of the meshing between the input shaft side gear supported by the cutting input shaft 38 and the transmission shaft side gear supported by the idler shaft 215. The effect | action of the direction which mutually separates shafts arises. Therefore, a configuration is adopted in which the erection support plate 220 is provided in an erected state between the cutting input shaft 38 and the idler shaft 215 and the left end portion of each axis is pivotally supported by the erection support plate 220.

  According to such a configuration, the distance between the cutting input shaft 38 and the idler shaft 215 is kept constant. Thereby, the input shaft side gear and the transmission shaft side gear constituting the amplification mechanism 200 are restricted from being separated from each other, and a stable meshing state can be obtained with respect to the meshing of these gears.

  As described above, according to the erection support plate 220, a stable operation state can be obtained in the reverse rotation mechanism 110 and the amplification mechanism 200, and the reverse rotation action of the conveyor 36 by the reverse rotation mechanism 110 and the rotation increase by the amplification mechanism 200 are increased. It is possible to reliably obtain a speed transmission action.

  Then, the structure regarding operation of the reverse rotation mechanism 110 in the combine 1 which concerns on this embodiment is demonstrated.

  The operation of the reverse rotation mechanism 110 is operated by a predetermined operation tool via the operation wire 145 as described above. In the present embodiment, as the operating tool of the reversing mechanism 110, a work clutch lever 23 provided in the operating unit 15 for turning on and off the threshing clutch 57 and the reaping clutch 75 (see FIG. 4) is employed.

  In other words, the combine 1 of the present embodiment is configured so that the operation / non-operation of the reversing mechanism 110 is operated by the operation of the work clutch lever 23 which is a work operation tool for operating the reaping part 3 and the threshing part 7. It is configured. Therefore, the other end side of the operation wire 145 is provided via a component member of the link mechanism 300 provided between the claw member 130 and the work clutch lever 23 so that the reverse rotation mechanism 110 is operated by the work clutch lever 23. The work clutch lever 23 is connected. That is, the claw member 130 is linked to the work clutch lever 23 by the link mechanism 300 including the operation wire 145.

  The operation structure and operation mode of the work clutch lever 23 as the operation tool of the reverse rotation mechanism 110 will be described with reference to FIGS. 14 and 15. As shown in FIG. 14, the work clutch lever 23 has a rod-shaped lever main body 23a having a predetermined shape and a substantially spherical gripping portion 23b provided at the upper end of the lever main body 23a.

  The work clutch lever 23 is provided in a state of protruding upward from a lever guide portion 150 provided in a lever column 24 provided on the left side of the driver seat 17. The lever guide portion 150 is a state in which the lever main body portion 23a of the work clutch lever 23 is penetrated, and the work clutch lever 23 along the predetermined operation movement path having a plurality of operation positions corresponding to the predetermined operation contents as stop positions. Guide the movement. The lever body 23a has a predetermined bent shape so as to extend upward from the lever column 24 to the right side that is the driver seat 17 side.

  The lever guide portion 150 includes a guide opening 151 formed in the upper surface 24 a of the lever column 24 and a guide plate 152 provided below the guide opening 151.

  The guide opening 151 has a predetermined opening shape along the operation movement path of the work clutch lever 23. The guide plate 152 has a rectangular outer shape in plan view. The guide plate 152 has a plate opening smaller than the opening size of the guide opening 151 and having an opening shape along the opening shape of the guide opening 151 so as to be included in the opening range of the guide opening 151 in plan view. A portion 152a is formed. The plate opening 152a is covered with a plate-shaped covering member 153 that can be elastically deformed. The covering member 153 has an opening through which the lever main body 23a of the work clutch lever 23 passes. The opening of the covering member 153 includes a slit-shaped portion along the movement path of the work clutch lever 23 and a wide portion such as a substantially circular shape at each operation position of the work clutch lever 23.

  The lever guide unit 150 includes a first movement path unit 161 extending in the left-right direction and a second portion extending forward from the right end of the first movement path unit 161 as a path portion constituting the operation movement path of the work clutch lever 23. And a third movement path portion 163 extending rearward from the left end portion of the first movement path portion 161. The lever guide portion 150 is configured to have a substantially crank shape as a whole by these movement path portions. In FIG. 14, for the sake of convenience, each moving path portion is schematically shown as a hatched portion.

  The work clutch lever 23 is configured such that the corner portion between the first movement path portion 161 and the third movement path portion 163 and the corner of the first movement path portion 161 and the second movement path portion 162 in the lever guide portion 150. The part, the front end part of the second movement path part 162, and the rear end part of the third movement path part 163 are set as operation positions corresponding to predetermined operation contents, respectively. Specifically, it is as follows.

  The operation clutch lever 23 has, as its operation position, a stop operation position P0 corresponding to a corner portion of the first movement path part 161 and the third movement path part 163, the first movement path part 161, and the second movement path part 161. The first work operation position P1 corresponding to the corner portion of the movement path part 162, the second work operation position P2 corresponding to the front end part of the second movement path part 162, and the rear end part of the third movement path part 163 There are four operation positions with the reverse operation position P3 corresponding to.

  The stop operation position P0 is an operation position where the transmission of power to the mowing unit 3 and the threshing unit 7 is turned off and the reverse rotation mechanism 110 is deactivated. That is, when the work clutch lever 23 is in the stop operation position P0 (see FIG. 15A), the reaping clutch 75 and the threshing clutch 57 (see FIG. 4) are in the OFF state, and the claw member 130 is in the reverse rotation mechanism 110. Is located at the disengaged position, and the cutting input shaft 38 is disengaged from the feeder house 35. That is, the state where the work clutch lever 23 is positioned at the stop operation position P0 is a neutral state. In the present embodiment, on the surface of the lever column 24, a stop display unit 170 displaying the characters “OFF” is provided in the vicinity of the stop operation position P0.

  The first work operation position P1 is a position moved by a predetermined amount in the right direction, which is the first direction, from the stop operation position P0, and is an operation position in which transmission of power to the threshing unit 7 is turned on. That is, in a state where the work clutch lever 23 is in the first work operation position P1 (see FIG. 15B), the reaping clutch 75 is in an OFF state, the threshing clutch 57 is in an ON state, and the reverse rotation mechanism 110 is in an inoperative state. Yes, the threshing unit 7 is in operation. In the present embodiment, on the surface of the lever column 24, a threshing display unit 171 that displays the characters “decompression” is provided in the vicinity of the first work operation position P1.

  The second work operation position P2 is a position moved by a predetermined amount from the first work operation position P1 in the forward direction, which is the third direction, and holds the power transmission to the threshing unit 7 while cutting. This is an operation position where the transmission of power to the unit 3 is turned on. That is, in a state where the work clutch lever 23 is in the second work operation position P2 (see FIG. 15C), the reaping clutch 75 and the threshing clutch 57 are in the ON state, and the reverse rotation mechanism 110 is in the inoperative state. 3 and the threshing unit 7 are in operation. In the present embodiment, on the surface of the lever column 24, a cutting display unit 172 that displays characters “cutting” is provided in the vicinity of the second work operation position P2.

  The reverse operation position P3 is a position moved from the stop operation position P0 by a predetermined amount in the rearward direction, which is a second direction different from the first direction, and is an operation position that activates the reverse rotation mechanism 110. That is, when the work clutch lever 23 is in the reverse operation position P3 (see FIG. 15D), the reaping clutch 75 and the threshing clutch 57 are in the OFF state, and the claw member 130 is in the engaged position in the reverse rotation mechanism 110. The cutting input shaft 38 is engaged with the feeder house 35. In the present embodiment, on the surface of the lever column 24, there is provided a cutting reverse display portion 173 displaying characters “cutting reverse” in the vicinity of the reverse rotation position P 3.

  As described above, in the combine 1 according to the present embodiment, the work clutch lever 23 is a position that is moved by a predetermined amount in at least the first direction from the stop operation position P0, and is at least one of the reaping part 3 and the threshing part 7. As work operation positions where transmission of power to the car is turned on, a first work operation position P1 and a second work operation position P2 are provided. That is, the first work operation position P1 is a position that is moved by a predetermined amount in the first direction (right direction) from the stop operation position P0, and is a work operation position in which transmission of power to the threshing unit 7 is turned on. Yes, the second work operation position P2 is a position moved by a predetermined amount in the right and forward directions from the stop operation position P0, and is a work operation position in which the transmission of power to the threshing unit 7 and the reaping unit 3 is turned on. It is.

  In the present embodiment, the second direction, which is the movement operation direction of the work clutch lever 23 from the stop operation position P0 to the reverse operation position P3, is the movement from the first work operation position P1 to the second work operation position P2. The direction is opposite to the third direction, which is the operation direction. That is, with respect to the operation direction of the work clutch lever 23, the third direction is the backward direction, and the backward direction, which is the opposite direction, is the second direction.

  Next, the link mechanism 300 including the operation wire 145 will be described with reference to FIGS. 16 and 17. As shown in FIGS. 16 and 17, the link mechanism 300 is engaged with a lever support rotation plate 310 as a first link member that supports the base portion of the work clutch lever 23 and the lever support rotation plate 310. And a rotating arm body 320 as a second link member that receives the connection of the other end of the operation wire 145.

  The lever support rotation plate 310 has a plate portion 311 which is a substantially mountain-shaped plate portion. The plate portion 311 is supported by the shaft support portion 312 so as to be rotatable about the first rotation axis S1 along the left-right direction, with the left-right direction being the thickness direction. The shaft support portion 312 is a portion having a cylindrical outer shape with the left-right direction as the cylinder axis direction, and is provided in a penetrating manner with respect to the plate portion 311 at the upper portion (substantially mountain-shaped top portion) of the plate portion 311. . The shaft support 312 is supported at a predetermined position with respect to a predetermined frame member arranged in the lever column 24. As described above, the lever support rotation plate 310 is provided so as to be rotatable about the first rotation axis S1 at a fixed position in the lever column 24.

  The lever support rotation plate 310 supports the base portion of the work clutch lever 23 on the plate portion 311 so as to be rotatable. The rod-shaped lever main body portion 23 a having a predetermined shape has a supported portion 23 c that is bent toward the front at a portion extending downward from the lever guide portion 150. The supported portion 23 c is a portion whose substantially longitudinal direction is the axial direction (extension direction), and forms the base of the work clutch lever 23.

  A supported portion 23 c of the work clutch lever 23 is supported along the substantially mountain-shaped bottom portion of the plate portion 311 at the lower portion of the right plate surface of the plate portion 311. The supported portion 23c is an annular or cylindrical shaft support member 313 fixed to the plate portion 311 at a predetermined position with the second rotation axis S2 coinciding with the central axis of the supported portion 23c as the rotation axis direction. It is rotatably supported.

  As described above, the work clutch lever 23 can be rotated in the front-rear direction about the first rotation axis S1 along the left-right direction by the lever support rotation plate 310, and in the second view along the front-rear direction in plan view. It is supported so as to be rotatable in the left-right direction around the moving shaft S2. In the relationship with the operation movement path of the work clutch lever 23 described above, the movement of the work clutch lever 23 in the front-rear direction is caused by the movement of the second movement path part 162 and the third movement path part 163 along the front-rear direction. An operation is used, and a rotation operation in the left-right direction is used to move the first movement path portion 161 along the left-right direction (see FIG. 14).

  The rotating arm body 320 is directed rearward from a support shaft portion 323 that rotates about a third rotation axis S3 along the left-right direction, and a right end that is one side of the support shaft portion 323 in the axial direction. The first arm 321 is extended, and the second arm 322 is extended downward from the left end, which is the other side of the support shaft 323 in the axial direction. The first arm 321 and the second arm 322 are integrally connected to each other via the support shaft portion 323, and have a substantially “L” shape in a side view as viewed in the axial direction of the third rotation shaft S3. It rotates integrally around the 3 rotation axis S3. The support shaft portion 323 is supported at a predetermined position with respect to a predetermined frame member disposed in the lever column 24. As described above, the rotation arm body 320 is provided so as to be rotatable around the third rotation axis S3 at a fixed position in the lever column 24.

  The first arm 321 is a long plate-like member, and is fixed to the right end portion of the support shaft portion 323 so that the left-right direction is the plate thickness direction. A long hole 321 a along the longitudinal direction of the first arm 321 is formed in the rear portion of the first arm 321. A rod-like engagement pin 314 that protrudes rightward from the front lower portion of the plate portion 311 passes through the long hole 321a. The engagement pin 314 is fixed to the plate portion 311 and rotates integrally with the plate portion 311.

  As described above, the rotation arm body 320 is engaged with the lever support rotation plate 310 by passing the engagement pin 314 through the long hole 321a of the first arm 321. Further, the engagement state of the lever support rotation plate 310 and the rotation arm body 320 is maintained by the engagement portion by the long hole 321a and the engagement pin 314, and the plate portion 311 and the first arm 321 are rotated. The relative movement of the engagement pin 314 with respect to the first arm 321 is allowed. The long hole 321 a guides the direction of relative movement of the engagement pin 314 with respect to the first arm 321 in the longitudinal direction of the first arm 321.

  The second arm 322 is a long plate-like member, and is fixed to the left end portion of the support shaft portion 323 so that the left-right direction is the plate thickness direction. An end of the operation wire 145 on the other end side is connected to an intermediate portion of the second arm 322. A rod-shaped connecting member 324 is provided at the other end of the operation wire 145. On the other hand, a bar-shaped connecting pin 325 is provided at the intermediate portion of the second arm 322 so as to protrude leftward. The connection pin 325 passes through the distal end portion of the connection member 324. The connecting member 324 is locked and supported by the connecting pin 325 by, for example, passing the locking pin through the tip of the connecting pin 325 that has penetrated the connecting member 324. In this way, the other end of the operation wire 145 is connected to the second arm 322 of the rotating arm body 320.

  Further, the other end side of the operation wire 145 is provided via a support stay 332 on a wire support column 331 disposed in the lever column 24 so as to extend horizontally from the connection end to the second arm 322 substantially rearward. It is supported. The support stay 332 is a bent plate-like member having a substantially “U” shape in a side view, and is fixed to the wire support column 331 by welding or the like with the bottom surface side in the substantially “U” shape as a front side. ing. Further, a wire support member 333 that allows the operation wire 145 to pass through together with the coating tube 149 is provided at the other end of the coating tube 149 that covers the operation wire 145. The wire support member 333 is fixed to the support stay 332 in a manner that penetrates the front surface portion of the support stay 332.

  As described above, the portion on the other end side of the operation wire 145 defines the direction of the operation force (tensile force) with respect to the operation wire 145, and the operation force is applied to the operation wire 145 in a stable manner. It is supported horizontally along the direction. Specifically, the forward extending portion of the operation wire 145 from the wire support member 333 is slightly tilted to the left (see FIG. 17). With such a connection structure of the operation wire 145 to the rotation arm body 320, the second arm 322 is moved forward by the rotation of the rotation arm body 320 about the third rotation axis S3. 145 is pulled forward from the end on the other end side.

  The work clutch lever 23 that operates the link mechanism 300 having the above-described configuration is provided with a plurality of switches that are operated by the operation of a predetermined member that is interlocked with the operation of the work clutch lever 23. The plurality of switches include a threshing switch 401, a reaping switch 402, and a reverse rotation switch 403. These switches function as detection means for detecting the operation position of the work clutch lever 23, and are connected to a controller 400 as a control unit included in the combine 1, as shown in FIG.

  The controller 400 connects various functional units such as a CPU (Central Processing Unit) that executes various arithmetic processes and controls, a ROM (read only memory) as a storage unit, a RAM (random access memory), and an input / output interface via a bus or the like. It is provided with the structure made to do. The CPU performs arithmetic processing according to various programs stored in the ROM or the like. The controller 400 receives detection signals from the threshing switch 401, the reaping switch 402 and the reverse rotation switch 403 and detection signals from various sensors included in the combine 1, and generates a control signal based on these input signals.

  A threshing clutch 57 is connected to the controller 400 via a threshing clutch actuator (not shown). Based on the detection signal from the threshing switch 401, the controller 400 controls the operation of the threshing clutch 57 via the operation control of the threshing clutch actuator. The controller 400 is connected to a cutting clutch 75 via a cutting clutch actuator (not shown). Based on the detection signal from the cutting switch 402, the controller 400 controls the operation of the cutting clutch 75 via the operation control of the cutting clutch actuator. The detection signal from the reverse rotation switch 403 is used for starting / stopping control of the engine 25 described later performed by the controller 400.

  The threshing switch 401 is a detection device for detecting that the work clutch lever 23 is at a position from the first work operation position P1 to the second work operation position P2, which is a position corresponding to threshing “ON”. Specifically, the threshing switch 401 is turned on when the work clutch lever 23 moves from the stop operation position P0 to the first work operation position P1 (see FIG. 14).

  As shown in FIG. 17, the threshing switch 401 is a push switch having a push button 401a, and is turned on when the push button 401a is pressed. The threshing switch 401 is located on the left side of the front / rear extending frame 341 arranged along the front / rear direction at a position on the left side of the work clutch lever 23 in plan view in the lever column 24 with the push button 401a side as the rear side. It is fixed and supported at a predetermined position by a fixing tool such as a bolt via a support plate 342.

  On the other hand, on the rear side of the work clutch lever 23, a pressing member 350 that presses the push button 401a in conjunction with the movement operation of the work clutch lever 23 is provided. The pressing member 350 includes a cylindrical shaft support portion 351 whose vertical direction is the cylinder axis direction, an engagement arm piece 352 that is provided on the front side of the shaft support portion 351 and engages the work clutch lever 23, and a left side from the shaft support portion 351. And a pressing arm piece 353 that presses and acts on the push button 401a.

  The pressing member 350 supports the shaft support 351 coaxially with respect to the support column 354 provided on the rear side of the work clutch lever 23 in the lever column 24, and coincides with the central axis of the cylindrical shaft support 351. It is provided so as to rotate around a fourth rotation axis S4 along the vertical direction. The support column 354 is fixed to the rear side of the horizontal frame 344 between the front / rear extending frame 341 and the right front / rear extending frame 343 disposed on the right side of the lever column 24 by welding or the like. It is installed. The engaging arm piece 352 and the pressing arm piece 353 constitute an integral pressing member 350 together with the shaft support portion 351, and rotate around the fourth rotation axis S4.

  The engagement arm piece 352 is a plate-like portion whose vertical direction is the plate thickness direction, and has a concave portion 352a whose front side is bifurcated and whose front side is the open side. The pressing member 350 is engaged with the work clutch lever 23 by positioning the lever main body 23 a in the recess 352 a of the engaging arm piece 352.

  The pressing arm piece 353 is a plate-like portion whose substantially front-rear direction is the plate thickness direction, and is provided so that the distal end side is located on the front side of the push button 401a. A plate surface 353a on the front side of the pressing arm piece 353 serves as a pressing surface and presses the push button 401a.

  With such a configuration, the horizontal rotation of the work clutch lever 23 about the second rotation axis S2 is centered on the fourth rotation axis S4 of the pressing member 350 via the engagement arm piece 352. It is transmitted as rotation in the left-right direction. The threshing switch 401 is turned ON / OFF by the movement of the pressing arm piece 353 in the front-rear direction by the rotation of the pressing member 350. That is, when the work clutch lever 23 is moved rightward from the stop operation position P0 toward the first work operation position P1, the pressing member 350 is rotated in the right rotation direction (clockwise) in plan view. Accordingly, the pressing arm piece 353 moves forward and presses the push button 401a, and the threshing switch 401 is turned on. The ON state of the threshing switch 401 is also maintained when the work clutch lever 23 moves from the first work operation position P1 to the second work operation position P2. On the other hand, by returning the work clutch lever 23 from the first work operation position P1 to the stop operation position P0, the pressing action on the push button 401a by the pressing arm piece 353 is released with the rotation of the pressing member 350, and the threshing switch 401 is released. Is turned off.

  The cutting switch 402 is a detection device for detecting that the work clutch lever 23 is in the second work operation position P2, which is a position corresponding to the cutting “ON”. Specifically, the cutting switch 402 detects that the work clutch lever 23 has moved from the first work operation position P1 to the second work operation position P2.

  As shown in FIG. 16, the cutting switch 402 is a lever switch that has a rotation lever 402a that rotates about a predetermined rotation axis, and the rotation lever 402a rotates by a predetermined amount from the OFF state. It will be in the ON state. The cutting switch 402 protrudes upward from the rotation lever 402a and is horizontally oriented at a position below the lever support rotation plate 310 in the lever column 24 so that the rotation axis direction of the rotation lever 402a is the left-right direction. The switch support stay 345 provided in a shape is fixed and supported at a predetermined position by a fixing tool such as a bolt.

  On the other hand, the plate portion 311 is provided with a first lever operation arm 371. The first lever operating arm 371 is a bar-shaped portion bent in an L shape, and is fixed to the front end portion of the plate portion 311 by welding or the like, and extends downward. It has a horizontal shaft portion 371a that is bent toward the left and right along the rod axis direction. The first lever operation arm 371 positions the horizontal shaft portion 371 a on the front side of the rotation lever 402 a of the cutting switch 402.

  With such a configuration, the cutting is performed by the back and forth movement of the first lever operation arm 371 accompanying the rotation of the lever support rotation plate 310 by the rotation of the work clutch lever 23 about the first rotation axis S1 in the front-rear direction. The switch 402 is turned on / off. That is, when the work clutch lever 23 is moved forward from the first work operation position P1 toward the second work operation position P2, the plate portion 311 is rotated in the right rotation direction (clockwise) in the right side view. As a result, the horizontal shaft portion 371a of the first lever operation arm 371 moves rearward and presses the rotation lever 402a to rotate rearward, so that the cutting switch 402 is turned on. On the other hand, by returning the work clutch lever 23 from the second work operation position P2 to the first work operation position P1, the first lever operation arm 371 pushes against the turning lever 402a with the turning of the lever support turning plate 310. The action is released and the cutting switch 402 is turned off.

  The reverse rotation switch 403 is a detection device for detecting that the work clutch lever 23 is in the reverse rotation operation position P3 that is a position corresponding to the cutting reverse rotation "ON". Specifically, the reverse rotation switch 403 detects that the work clutch lever 23 has moved from the stop operation position P0 to the reverse operation position P3.

  The reverse rotation switch 403 is a lever switch having a rotation lever 403a that rotates about a predetermined rotation axis, similar to the cutting switch 402, and is turned on when the rotation lever 403a rotates a predetermined amount from the OFF state. It becomes the state of. The reversing switch 403 projects the rotating lever 403a upward, and the rotating lever 403a has a rotating shaft direction in the left-right direction. A fixing tool such as a bolt is attached to a predetermined support member provided in the lever column 24. Is fixedly supported at a predetermined position.

  On the other hand, the second arm 322 is provided with a second lever operation arm 372. The second lever operation arm 372 is a bar-shaped portion bent in an L shape, and is fixed to the lower side of the left bent surface portion 322a provided at the lower end portion of the second arm 322 by welding or the like and extends downward. It has a horizontal shaft portion 372a that is bent toward the right and has the rod axis direction along the left-right direction at its extended end. The second lever operation arm 372 positions the horizontal shaft portion 372a on the front side of the rotation lever 403a of the reverse rotation switch 403.

  With such a configuration, the second lever operation accompanying the rotation of the rotation arm body 320 via the lever support rotation plate 310 by the rotation of the work clutch lever 23 in the front-rear direction about the first rotation axis S1. By turning the arm 372 back and forth, the reverse switch 403 is switched on / off. That is, when the work clutch lever 23 is moved backward from the stop operation position P0 toward the reverse operation position P3, the plate portion 311 rotates in the left rotation direction (counterclockwise direction) when viewed from the right side. In conjunction with this, the rotating arm body 320 rotates in the right rotation direction when viewed from the right side, and accordingly, the horizontal shaft portion 372a of the second lever operation arm 372 moves rearward to press the rotating lever 403a. As a result, the reverse rotation switch 403 is turned on. On the other hand, by returning the work clutch lever 23 from the reverse operation position P3 to the stop operation position P0, the rotation lever 403a by the second lever operation arm 372 is accompanied by the rotation of the lever support rotation plate 310 and the rotation arm body 320. Is released, and the reverse rotation switch 403 is turned off.

  An example of the operation mode of the combine 1 having the above configuration will be described with reference to FIGS. 15, 18, 19, and 20.

  First, a neutral state in which the work clutch lever 23 is at the stop operation position P0 will be described. In this state, as shown in FIGS. 15 (a) and 19 (b), the work clutch lever 23 is located in the neutral position in the front-rear direction and in the left position in the left-right direction. Both 402 and the reverse rotation switch 403 are in an OFF state. That is, in the neutral state, the pressing arm piece 353 does not act on the threshing switch 401, the first lever operation arm 371 does not act on the cutting switch 402, and the second lever operation arm 372 does not act on the reverse rotation switch 403. ing.

  Further, in the neutral state, as shown in FIG. 20B, the reverse rotation mechanism 110 is in an inoperative state, and the claw member 130 is located in the non-engagement position. The state in which the claw member 130 is in the disengaged position is a rotating arm body in a predetermined rotating position via the lever support rotating plate 310 corresponding to the work clutch lever 23 held in the neutral position in the front-rear direction. 320 is held by the pulling action of the operation wire 145 against the urging action of the spring 140 by 320. The state where the work clutch lever 23 is positioned at each operation position is held by an appropriate structure such as a connection support structure for each member in the link mechanism 300 or a predetermined holding structure provided separately.

  When starting the work from the neutral state, as shown in FIG. 15B, the work clutch lever 23 is moved rightward from the stop operation position P0 toward the first work operation position P1 (see arrow X1). . As a result, the pressing member 350 engaged with the work clutch lever 23 rotates in the clockwise direction about the fourth rotation axis S4 (see FIG. 17, arrow M1), and the threshing switch is pressed by the pressing arm piece 353. The push button 401a 401 is pressed, and the threshing switch 401 is turned on. Thereby, it is detected that the work clutch lever 23 is in the first work operation position P1.

  When the detection signal from the threshing switch 401 is input to the controller 400, the controller 400 sends a control signal for setting the threshing clutch 57 to the “ON” state to the threshing clutch actuator. Thereby, the threshing clutch 57 is turned on, the threshing unit 7 starts operating, and the handling cylinder 41 and the like start to rotate.

  Further, in the state where the work clutch lever 23 is at the first work operation position P1, the reverse rotation mechanism 110 is in the non-operating state as in the neutral state (see FIG. 20B). This is based on the fact that the work clutch lever 23 is in the neutral position in the front-rear direction regardless of whether the work clutch lever 23 is in the stop operation position P0 or the first work operation position P1.

  Next, as shown in FIG. 15C, the work clutch lever 23 is moved forward from the first work operation position P1 toward the second work operation position P2 (see arrow X2). As a result, the lever support rotation plate 310 rotates about the first rotation axis S1 in the right rotation direction when viewed from the right side (see FIG. 20 (c), arrow M2) and is cut by the first lever operation arm 371. The turning lever 402a of the switch 402 is pushed and turned (see FIG. 20C, arrow M3), and the cutting switch 402 is turned on. Thereby, it is detected that the work clutch lever 23 is in the second work operation position P2. Here, since the horizontal position of the work clutch lever 23 is constant between the first work operation position P1 and the second work operation position P2, the rotation of the pressing member 350 that turns the threshing switch 401 on is performed. With the movement position held, the forward movement of the work clutch lever 23 is allowed by the recess 352a of the engagement arm piece 352.

  When the detection signal from the reaping switch 402 is input to the controller 400, the controller 400 sends a control signal for setting the reaping clutch 75 to the “on” state to the reaping clutch actuator. Thereby, in a state where the threshing unit 7 is in operation, the reaping clutch 75 is turned on, the reaping unit 3 starts to operate, and the conveyor 36 and the take-up auger 37 of the feeder 30 start to rotate. Thereby, the combine 1 will be in a working state and the cutting operation | work by the cutting part 3, the threshing operation | work by the threshing part 7, etc. are performed.

  Then, when the cereal is clogged in the feeder 30 during the operation by the combine 1, as shown in FIG. 15D, the work clutch lever 23 is moved from the second work operation position P2 to the reverse operation position P3. Is moved to. Thereby, while the operation | movement of the cutting part 3 and the threshing part 7 stops, the reverse rotation mechanism 110 will be in an operation state.

  Here, the work clutch lever 23 includes the second movement path part 162, the first movement path part 161, and the third movement path part 163 so as to pass through the first work operation position P1 and the stop operation position P0. Move along a crank-shaped path. Specifically, the work clutch lever 23 moves from the work state of the combine 1 to the reverse operation position P3 through the following three steps of operation.

  That is, in the first stage, the lever support rotation plate 310 is rotated counterclockwise as viewed from the right side to release the action of the first lever operation arm 371 on the cutting switch 402, and the cutting switch 402 is turned OFF. This is a backward operation from the second work operation position P2 to the first work operation position P1 (see FIG. 15 (d), arrow X3), in which 75 is set to the “OFF” state. In the second stage, the pressing member 350 is rotated counterclockwise in a plan view to cancel the action of the pressing arm piece 353 on the threshing switch 401, the threshing switch 401 is turned off, and the threshing clutch 57 is in the “off” state. This is a leftward operation from the first work operation position P1 to the stop operation position P0 (see FIG. 15 (d), arrow X4). The third stage is the backward operation from the stop operation position P0 to the reverse operation position P3 (see FIG. 15 (d), arrow X5) with the harvest reverse rotation turned ON.

  When the neutral state in which the work clutch lever 23 is at the stop operation position P0 is used as a reference, the reverse rotation mechanism 110 is activated by the backward operation of the work clutch lever 23 from the neutral state. Here, the threshing switch 401 is kept in the OFF state. That is, since the position in the left-right direction of the work clutch lever 23 is constant between the stop operation position P0 and the reverse operation position P3, the rotation position of the pressing member 350 that turns off the threshing switch 401 is maintained. In this state, the rearward movement of the work clutch lever 23 is allowed by the recess 352a of the engagement arm piece 352.

  When the work clutch lever 23 is moved from the stop operation position P0 to the reverse operation position P3, as shown in FIG. 19A, the lever support rotation plate 310 is centered on the first rotation axis S1 on the right side surface. The first arm 321 is pushed upward by the engaging pin 314 penetrating the elongated hole 321a in conjunction with the rotation in the counterclockwise direction (see arrow M4). It rotates in the clockwise direction about the rotation axis S3 in the right side view (see arrow M5). As a result, the operation wire 145 pulled by the second arm 322 is loosened, and the pulling action of the claw member 130 by the operation wire 145 holding the claw member 130 in the disengaged position is released. Accordingly, as shown in FIG. 20A, the claw member 130 is rotated in the engagement direction by the urging force of the spring 140 and engaged with the gear 120 (see arrow M6), and the cutting input shaft 38 is fed to the feeder house. 35 is engaged.

  In this way, the link mechanism 300 releases the tension of the operation wire 145 against the urging force of the spring 140 against the claw member 130 by the stroke operation from the stop operation position P0 to the reverse operation position P3 of the work clutch lever 23. It is configured. In other words, the link mechanism 300 disengages the claw member 130 from the engagement position against the biasing force of the spring 140 by the stroke operation from the reverse operation position P3 of the work clutch lever 23 to the stop operation position P0. A pulling action of the operation wire 145 that is moved to the position and held is obtained.

  In the operating state of the reverse rotation mechanism 110, that is, in a state where the cutting input shaft 38 is engaged with the feeder house 35, the feeder 30 moves up, whereby the cutting input shaft 38 rotates in the reverse rotation direction, and the feeder 30 conveys the conveyor 30. 36 will operate in the opposite direction. Thereby, the clogging of the cereals in the feeder 30 is eliminated.

  Here, when the clogging of the grain straw in the feeder 30 is eliminated, the raising operation of the feeder 30 may be performed a plurality of times as necessary by lowering the feeder 30 again. When the feeder 30 moves downward in the operating state of the reversing mechanism 110, the ratchet structure of the reversing mechanism 110 allows the relative rotation of the feeder house 35 with respect to the cutting input shaft 38, so that the cutting input shaft 38 rotates in the forward rotation direction. This rotation is prevented or suppressed.

  After the clogging of the cereals in the feeder 30 is eliminated, the combine 1 is put into a work state by moving the work clutch lever 23 again to the first work operation position P1 and the second work operation position P2, and the work is resumed. Is done.

  In the operation interlocking mechanism of the work clutch lever 23 and the reverse rotation mechanism 110 as described above, the claw member 130 of the reverse rotation mechanism 110 is engaged with the gear 120 by the link mechanism 300 according to the operation of the work clutch lever 23. It is rotated in the anti-engagement direction in two stages from the combined position. That is, the claw member 130 is located at the disengagement position where the engagement with the gear 120 is disengaged as the non-engagement position, and is movable from the disengagement position to the retracted position that is further rotated in the anti-engagement direction. It is configured. Specifically, it is as follows.

  Regarding the four operation positions of the work clutch lever 23, in the front-rear direction, the reverse operation position P3 is the rear position, the stop operation position P0 and the first work operation position P1 are the neutral positions, and the second work operation position P2 is the front position. Divided into three positions.

  As shown in FIG. 19A, when the work clutch lever 23 is in the rear position (reverse operation position P3), the claw member 130 is engaged with the gear 120 as shown in FIG. Positioned at the position, the reverse rotation mechanism 110 is activated.

  When the work clutch lever 23 is operated from the rear position to the neutral position (the stop operation position P0 or the first work operation position P1), as shown in FIG. Is rotated in the clockwise direction (see arrow M7), and in conjunction with this, the rotating arm body 320 is rotated in the counterclockwise direction in the right side view (see arrow M8), and the other end of the operation wire 145 is Pulled forward (see arrow M9). Accordingly, as shown in FIG. 20B, the claw member 130 rotates in the anti-engagement direction against the biasing force of the spring 140 and reaches the disengagement position (see arrow M10), and the reverse rotation mechanism 110. Is deactivated.

  Further, as shown in FIG. 19 (c), when the work clutch lever 23 is operated from the first work operation position P1 which is the neutral position to the front position (second work operation position P2), the lever support rotation plate is operated. 310 further rotates in the right rotation direction as seen from the right side (see arrow M2), and in conjunction with this, the first arm 321 is pushed downward by the engagement pin 314 penetrating the elongated hole 321a, and the rotation arm The body 320 further rotates in the left rotation direction in the right side view (see arrow M11). As a result, the other end of the operation wire 145 connected to the second arm 322 is further pulled forward (see arrow M12). As a result, as shown in FIG. 20C, the claw member 130 further rotates in the anti-engagement direction against the biasing force of the spring 140 and reaches the retracted position (see arrow M13). That is, the claw member 130 in the disengagement position is further rotated in the anti-engagement direction from the disengagement position as the cutting clutch 75 is turned on by the operation of the work clutch lever 23. Rotates to the retracted position.

  As described above, the link mechanism 300 that interlocks and connects the claw member 130 of the reverse rotation mechanism 110 and the work clutch lever 23 moves the claw member when the work clutch lever 23 moves from the reverse rotation operation position P3 to the stop operation position P0. 130 is moved to the disengagement position where the engagement with the gear 120 is released, and the work clutch lever 23 is moved from the first work operation position P1 to the second work operation position P2. It is configured to move from the release position to a retracted position moved further in the disengagement direction (anti-engagement direction).

  Further, in the combine 1 of the present embodiment provided with the reverse rotation mechanism 110, the controller 400 that controls the start of the engine 25 controls the start and stop of the engine 25 based on the detection signal from the reverse rotation switch 403.

  As described above, the reverse rotation switch 403 detects that the work clutch lever 23 is in the reverse operation position P3. Therefore, in a state where the detection signal from the reverse rotation switch 403 is input to the controller 400, the controller 400 performs control so that the engine 25 is not started. That is, the controller 400 performs control to disable the starting of the engine 25 in a state where the reverse rotation switch 403 detects that the work clutch lever 23 is positioned at the reverse rotation operation position P3. An example of a configuration for performing such control will be described.

  As shown in FIG. 18, the controller 400 is connected to a battery 406 via a starter switch 405 for applying power. The starter switch 405 is a rotary switch or a push button switch that can be rotated by inserting a predetermined key into the keyhole. For example, the starter switch 405 is provided in a steering column located in front of the driver seat 17 in the driver unit 15.

  Normally, when the starter switch 405 is turned on, the current from the battery 406 flows into the coil portion of the starter relay connected to the starter, and the starter relay switch portion becomes conductive. Thus, the starter is activated by energization from the battery 406, and the engine 25 is started. After the engine 25 is started, the driving state of the engine 25 and the power supply from the battery 406 to each unit are maintained. When the starter switch 405 is turned off, the power supply from the battery 406 is stopped and the drive of the engine 25 is stopped.

  In such a configuration, when the controller 400 detects that the work clutch lever 23 is at the reverse operation position P3 based on the detection signal from the reverse switch 403, the starter switch 405 is turned on when the engine 25 is started. The engine 25 is not started by being operated. In other words, the controller 400 performs control so that the current from the battery 406 does not flow into the coil portion of the starter relay so that the switch portion of the starter relay is maintained in the cut-off state (non-conduction state) in the state where the cutting reverse rotation is ON. Do. As a result, the energization from the battery 406 to the starter is interrupted, the starter does not operate, and as a result, the engine 25 does not start.

  In the start / stop control of the engine 25 based on the detection signal of the reverse rotation switch 403, for example, an alarm buzzer is sounded, or the display unit such as a liquid crystal display device provided in the operation unit 15 is operated, for example, “cutting reverse rotation”. Turn off and start the engine. May be displayed. As a result, it is possible to alert the operator of the middle level and accurately notify that the engine 25 cannot be started.

  According to the combine 1 of the present embodiment having the above-described configuration, the structure is complicated in the configuration including the feeder 30 that conveys and supplies the cereal harvested by the reaping unit 3 to the threshing unit 7. In a simple structure, it is possible to move the conveyor 36 in the reverse direction of the feeder 30 and to eliminate clogging of the cereals in the feeder 30.

  That is, the combine 1 according to the present embodiment forces the conveyor 36 to move in the reverse direction by using the ascending operation of the feeder 30 by causing the reversing mechanism 110 to engage the cutting input shaft 38 with the feeder house 35. It is equipped with a configuration for rotating the motor. That is, the conveyor 36 is configured to rotate in the reverse direction with power unrelated to the transmission system that drives the working units such as the reaping unit 3 and the threshing unit 7.

  Thereby, in comparison with the conventional configuration in which a power transmission mechanism for reversing the conveyor is provided in the power transmission path from the engine to the cutting unit, the power transmission configuration from the engine 25 to the cutting unit 3 is not particularly changed. It is possible to realize a configuration for operating 36 in the reverse direction with an inexpensive and simple configuration. Further, since the reverse rotation mechanism 110 according to the present embodiment operates the conveyor 36 in the reverse direction by using the ascending operation of the feeder 30 by the ascending / descending cylinder 39, the hydraulic pressure that operates the ascending / descending cylinder 39 and the like in the combine 1. There is no need to change the apparatus, and it is not necessary to use extra power to move the conveyor 36 in the reverse direction.

  Further, since the feeder 30 is lifted by the action of hydraulic pressure by the lift cylinder 39, the lifting operation of the feeder 30 can easily obtain a large operating force as compared with the lowering motion due to the weight of the feeder 30. For this reason, for example, even when the feeder 30 is difficult to move up and down due to the clogging action of the cereals in the feeder house 35, the feeder 30 can be reliably raised, and the reverse rotation operation of the conveyor 36 by the reverse rotation mechanism 110 is reliably obtained. It becomes possible. Further, since the raising operation of the feeder 30 is actively performed by the operation of the lifting and lowering cylinder 39, it is easier to control the operation than the lowering operation due to the weight of the feeder 30, and the conveyor 36 is moved by the reverse rotation mechanism 110. Good operability can be obtained for the reverse operation.

  Further, according to the reverse rotation mechanism 110 according to the present embodiment, the reverse rotation mechanism 110 can be configured regardless of the power transmission path from the engine 25 to the cutting unit 3. For this reason, it is not necessary to provide a structure for avoiding mutual interference between the power transmissions for the forward and reverse rotations of the conveyor 36 in the power transmission path from the engine 25 to the cutting unit 3. A configuration for operating the conveyor 36 in the reverse direction without increasing the size can be achieved.

  Further, the reverse rotation mechanism 110 according to the present embodiment includes a gear 120 supported by the cutting input shaft 38 and a claw member 130 supported by the feeder house 35 and provided on the feeder 30 side as main components. Yes. According to such a configuration, the reverse rotation mechanism 110 can be realized with a very simple configuration, and can be easily provided with respect to the existing configuration of the combine 1.

  In addition, the reverse rotation mechanism 110 according to the present embodiment uses the gear 120 and the claw member 130 to raise or lower the feeder 30 that rotates the cutting input shaft 38 in the reverse rotation direction in the operation state of the reverse rotation mechanism 110. It is configured as a ratchet mechanism that restricts to According to such a configuration, in the operating state of the reverse rotation mechanism 110, the feeder 30 can be rotated relative to the cutting input shaft 38 when the feeder 30 is lowered. For this reason, when removing the clogging of the cereal grains in the feeder 30, the feeder 30 is moved up and down, so that when the conveyor 36 is moved in the reverse direction by the lifting operation of the feeder 30, the lifting and lowering operation of the feeder 30 is performed. Can be performed smoothly.

  In addition, the combine 1 according to the present embodiment includes an amplifying mechanism 200 that amplifies the amount of rotation of the gear 120 that rotates by receiving the ascending operation of the feeder 30 via the claw member 130 and transmits the amplified amount to the cutting input shaft 38. Prepare. According to such a configuration, it is possible to obtain a sufficient amount of rotation for the rotation in the reverse direction of the cutting input shaft 38 that moves the conveyor 36 in the reverse direction while using the lifting and lowering operation of the feeder 30. That is, since the operation stroke of the raising / lowering operation of the feeder 30 is limited, there is a case where it is not possible to obtain a sufficient amount of rotation to eliminate clogging of the cereals with respect to the rotation of the cutting input shaft 38 in the reverse direction. However, by providing the amplifying mechanism 200, the amount of rotation of the cutting input shaft 38 due to the rotation of the gear 120 accompanying the upward rotation of the feeder 30 can be amplified. Thereby, it is possible to easily obtain a sufficient amount of operation for the reverse operation of the conveyor 36, and to effectively eliminate clogging of the cereal.

  The amplifying mechanism 200 is engaged with the input shaft side gear (the first gear 211 and the fourth gear 214) supported by the cutting input shaft 38, the idler shaft 215, and the idler shaft 215. It includes a transmission shaft side gear (second gear 212 and third gear 213). According to such a configuration, the amplification mechanism 200 can be easily configured using the existing configuration, and the amplification effect of the rotation amount by the amplification mechanism 200 can be obtained reliably and easily.

  Further, the reverse rotation mechanism 110 according to the present embodiment is provided on the left side that is the left and right outer sides of the machine body with respect to the feeder house 35 in the feeder 30. According to such a configuration, since the part where the reverse rotation mechanism 110 is disposed is the left outer portion of the combine 1, the accessibility to the reverse rotation mechanism 110 can be improved. Thereby, good maintainability can be obtained for the reverse rotation mechanism 110. Therefore, for example, when the arrangement of the feeder 30 of the cabin 16 is assumed to be reversed left and right with the combine 1 according to the present embodiment, the reversing mechanism 110 is located on the right side that is the left and right outside of the fuselage with respect to the feeder house 35. It is preferable to be provided.

  Further, the combine 1 according to the present embodiment is configured to operate the operation of the reverse rotation mechanism 110 by the work clutch lever 23 provided in the operation unit 15. According to such a configuration, an operator who is driving in the driving unit 15 can operate the reversing mechanism 110 without leaving the driver's seat 17, which is good for removing clogged cereals. Operability can be obtained.

  That is, for example, according to the configuration in which an operation tool for operating the reverse rotation mechanism 110 is separately provided, the number of operation objects by the operator increases, the operation becomes complicated, and the operation tool for operating the reverse rotation mechanism 110 is, for example, a cabin According to the configuration arranged outside the driving unit 15 such as the position between the feeder 16 and the feeder 30, it is difficult for the operator to operate the operating tool for operating the reverse rotation mechanism 110 while sitting on the driving seat 17. In some cases, good operability cannot be obtained. Therefore, the operability of the reverse operation of the conveyor 36 can be improved by using the work clutch lever 23 provided in the operation unit 15 as an operation tool of the reverse rotation mechanism 110 as in the combine 1 of the present embodiment.

  In addition, by adopting a configuration in which the reverse rotation mechanism 110 is operated by the work clutch lever 23, the existing operation tool provided in the operating unit 15 can be shared as the operation tool of the reverse rotation mechanism 110. It is necessary to separately provide an operation unit for operation, and the configuration of various operation units provided in the operation unit 15 can be simplified.

  Further, for example, when the reverse rotation mechanism 110 is configured to be operated by an operation tool provided separately from the work clutch lever 23, the reaping clutch 75 and the reverse rotation mechanism 110 are operated independently from each other. A configuration is required to prevent the reverse rotation mechanism 110 from being in the operating state when the 75 is ON (both forward and reverse biting). In this regard, by adopting a configuration in which the reverse rotation mechanism 110 is operated by the work clutch lever 23, the operating tool for the cutting clutch 75 and the reverse rotation mechanism 110 can be made common. By making the operation of the reverse rotation mechanism 110 different from each other, both forward and reverse biting can be reliably avoided.

  In the configuration in which the reverse rotation mechanism 110 can be operated by the work clutch lever 23, the work clutch lever 23 is moved to the stop operation position P0 and the first work operation position P1 moved to the right from the stop operation position P0. And a reverse operation position P3 moved backward from the stop operation position P0. According to such a configuration, it is possible to avoid unexpectedly moving the work clutch lever 23 to the reverse operation position P3, and good workability can be obtained.

  In particular, in the present embodiment, the work clutch lever 23 has a stop operation position P0, a first work operation position P1, a second work operation position P2, and a reverse operation position P3 as its operation positions. A crank-shaped operation movement path having a path end or a path corner is configured. According to such a configuration, the shape of the operation movement path of the work clutch lever 23 serves as the restraining means, and it becomes possible to prevent the reverse rotation mechanism 110 from being erroneously operated during the cutting operation as much as possible. Thereby, it becomes possible to prevent damage to each part such as the conveyor 36 and the reverse rotation mechanism 110.

  Specifically, with respect to the movement operation of the work clutch lever 23, the movement direction (right direction in the present embodiment) that drives the work unit starting from the stop operation position P0 is changed to a direction (backward in the present embodiment). The moving operation is an operation for operating the reverse rotation mechanism 110. For this reason, it is possible to prevent the reverse rotation mechanism 110 from operating due to an unexpected movement of the work clutch lever 23 due to an erroneous operation or the like from a state in which the work portion is operated by the operation position of the work clutch lever 23.

  In other words, for the movement operation of the work clutch lever 23, the movement operation for driving the working unit and the movement operation for operating the reverse rotation mechanism 110 are operations of a mutually continuous movement path along a common straight line. In this case, for example, it is conceivable that the reverse rotation mechanism 110 is unexpectedly activated due to an erroneous operation of the work clutch lever 23 or the like. Therefore, the lever guide portion 150 of the work clutch lever 23 is provided as a movement path portion for the reverse rotation mechanism 110 in a direction different from that of the first movement path portion 161 via a stop operation position P0 in a neutral state. 3 moving path portions 163. For this reason, when operating the reverse rotation mechanism 110, it is possible to reliably obtain an OFF state of the working unit, to avoid unintentional operation of the reverse rotation mechanism 110, and to obtain high safety.

  In this embodiment, the operation direction of the work clutch lever 23 for operating the reverse rotation mechanism 110 is the rear direction, and the operation direction of the work clutch lever 23 for turning on the cutting clutch 75 is the forward direction. The opposite direction. According to such a configuration, an operation of the work clutch lever 23 for operating the reversing mechanism 110 that directly interferes with the operation of the cutting unit 3 is performed, and the operation clutch lever 23 for operating the cutting unit 3 is operated. Therefore, it is possible to clearly separate the operation, and higher safety can be obtained.

  In the present embodiment, the claw member 130 is coupled to the work clutch lever 23 by the link mechanism 300 including the operation wire 145 and is urged in a direction to engage the gear 120 by the spring 140. A configuration is employed in which the disengagement state of the claw member 130 with respect to the gear 120 is maintained by pulling 130 against the spring 140 by the operation wire 145. According to such a configuration, when the engagement of the claw member 130 is released and the reversing mechanism 110 is inactivated, the claw member 130 is pulled by the operation wire 145 so that the engagement of the claw member 130 is ensured. Can be released.

  That is, if a configuration in which the engagement of the claw member 130 is released by the biasing force of the spring is employed, the operation of the work clutch lever 23 is not sufficiently transmitted to the claw member 130 via the spring depending on the state of the spring or the like. Or the claw member 130 remains in a state of being engaged with the gear 120 by the action of a spring. Therefore, by adopting the pulling operation wire 145 as the operation member for releasing the engagement of the claw member 130, the operation of the work clutch lever 23 can be reliably transmitted to the claw member 130. The biting can be prevented, and the reverse rotation mechanism 110 can be reliably inactivated by the operation of the work clutch lever 23. Further, with respect to the rotation of the claw member 130 in the engaging direction, the biasing force of the spring 140 is used, so that the claw member 130 is compared with, for example, a configuration using a wire separately from the operation wire 145 for releasing the engagement. It is possible to realize a structure for operating the projector with a simple configuration.

  In the present embodiment, the link mechanism 300 that connects the claw member 130 and the work clutch lever 23 to each other causes the claw member 130 to be disengaged from the engagement position in accordance with the operation position of the work clutch lever 23 in the front-rear direction. It is configured to rotate in two stages of an engagement release position and a retracted position in the mating direction. According to such a configuration, the claw member 130 is engaged with the claw member 130 in the state where the work clutch lever 23 is in the operation position for turning on the operation of the cutting unit 3 that directly interferes with the operation of the reverse rotation mechanism 110. It is possible to reliably evacuate from. Thereby, it can prevent reliably that the nail | claw member 130 engages with the gearwheel 120 in the state which the cutting part 3 is act | operating, and can obtain high safety | security.

  Moreover, the combine 1 of this embodiment is provided with the reverse rotation switch 403, and performs the start stop control of the engine 25 by the controller 400 based on the detection signal. According to such a configuration, it is possible to prevent the engine 25 from starting in a state where the work clutch lever 23 is in the reverse operation position P3 where the reverse rotation mechanism 110 is in an operating state (a state where the cutting reverse rotation is ON). Thereby, for example, by raising the feeder 30 after the start of the engine 25 in the state where the reversal of the cutting is turned ON, the cutting input shaft 38 is rotated in the reverse rotation direction. It is possible to solve the problem that each operation unit of the cutting unit 3 such as the conveyor 36 and the cutting blade device 32 that operate by receiving the transmission of power from 38 operates unintentionally. As a result, high safety can be obtained.

  The combine which concerns on this invention demonstrated using embodiment as mentioned above is not limited to embodiment mentioned above, A various aspect is employable in the range along the meaning of this invention.

  In the above-described embodiment, the lifting cylinder 39 that moves the feeder 30 up and down is a single-acting hydraulic cylinder that applies hydraulic pressure when the feeder 30 is lifted. However, the lifting cylinder 39 is not limited to this. A reciprocating cylinder may be used.

  In the above-described embodiment, the working clutch lever 23 for operating the reaping part 3 and the threshing part 7 is used as an operating tool for operating the reversing mechanism 110. However, the present invention is not limited to this. Absent. The operating tool for operating the reverse rotation mechanism 110 is an operating tool for operating either the reaping part 3 or the threshing part 7 or an operating tool provided separately for operating the reverse rotation mechanism 110. Or you may. However, from the viewpoint of simplifying the configuration using the existing configuration or avoiding the simultaneous operation state of the working unit such as the cutting unit 3 and the reverse rotation mechanism 110, the operation tool of the reverse rotation mechanism 110 is used. Is preferably a work operating tool for performing at least one of the operations of the cutting unit 3 and the threshing unit 7.

  Further, in the above-described embodiment, the lever guide portion 150 of the work clutch lever 23 has a substantially crank shape as a whole by the first movement path portion 161, the second movement path portion 162, and the third movement path portion 163. However, the present invention is not limited to this. In the lever guide 150, the direction along the third movement path 163 from the stop operation position P0 to the reverse operation position P3 (second direction) is the first from the stop operation position P0 to the first work operation position P1. Any direction that is different from the direction along which the moving path portion 161 extends (the first direction) may be used. Therefore, for example, the third movement path part 163 is provided forward from the stop operation position P0, and the lever guide part 150 is formed in a substantially “U” shape as a whole by each movement path part. Also good.

  In the above-described embodiment, as the engine 25 start / stop control, the controller 400 stops the start of the engine 25 by shutting off the power supply from the battery 406 to the starter. However, the present invention is not limited to this. It is not something. With regard to the start / stop control of the engine 25, in the configuration in which the reverse rotation mechanism 110 is operated by the work clutch lever 23, the engine 25 is controlled based on the output signal of the reverse rotation switch 403 that detects that the work clutch lever 23 is at the reverse rotation operation position P3. If it is control which stops a start, the control structure and control content will not be specifically limited.

DESCRIPTION OF SYMBOLS 1 Combine 2 Traveling machine body 3 Cutting part 6 Airframe frame 7 Threshing part 23 Work clutch lever (work operation tool)
25 Engine 30 Feeder (Conveyor)
35 Feeder house (housing)
36 Conveyor 38 Cutting input shaft (input shaft)
39 Lifting Cylinder 57 Threshing Clutch 75 Mowing Clutch 110 Reversing Mechanism 120 Gear (First Engaging Member)
130 Claw member (second engaging member)
140 Spring (biasing member)
145 Operation wire (wire member)
161 1st movement path part 162 2nd movement path part 163 3rd movement path part 200 Amplifying mechanism 211 1st gear (input shaft side gear)
212 Second gear (transmission shaft side gear)
213 Third gear (input shaft side gear)
214 4th gear (transmission shaft side gear)
215 idler shaft (transmission shaft)
300 Link mechanism 403 Reverse switch 400 Controller (control unit)
P0 Stop operation position P1 First work operation position P2 Second work operation position P3 Reverse operation position

Claims (5)

A combine equipped with a transport device that transports the cereals harvested by the mowing unit and supplies it to the threshing unit,
The transport device includes a conveyor having a drive shaft as an input shaft that receives power transmission with the left-right direction as an axial direction in a housing, and is moved up and down by rotation about the input shaft with respect to the main unit of the combine. It was provided to
A reverse mechanism that transmits the lifting operation of the transport device to the input shaft and rotates the input shaft in a direction opposite to the rotation direction during transport of the cereal using the lifting operation of the transport device;
The combine is configured such that the operation / non-operation of the reverse rotation mechanism is operated by an operation of a work operation tool for performing at least one of the harvesting unit and the threshing unit. The work operating tool has, as its operation position,
A stop operation position that turns off the transmission of power to the reaping part and the threshing part and deactivates the reverse rotation mechanism,
A position that has been moved a predetermined amount in at least a first direction from the stop operation position, and a work operation position that turns on transmission of power to at least one of the mowing unit and the threshing unit; and
2. A reverse operation position that is a position moved by a predetermined amount from the stop operation position in a second direction different from the first direction and that makes the reverse rotation mechanism in an operating state. Combine as described. The reverse mechanism is
A first engagement member supported by a protruding portion of the input shaft from within the housing;
A second state is provided in a state of being supported by the transport device, and transmits the ascending operation of the transport device to the input shaft via the first engagement member by engaging with the first engagement member. An engagement member,
The second engagement member is connected to the work operation tool by a link mechanism,
The work operation tool has the work operation position as:
A position moved from the stop operation position by a predetermined amount in the first direction, and a first work operation position for turning on transmission of power to the threshing portion;
It is a position moved by a predetermined amount in the third direction from the first work operation position, and the power transmission to the reaping part is turned on while maintaining the power transmission state to the threshing part. A second work operation position,
The link mechanism is
When the work operating tool moves from the reverse operation position to the stop operation position, the second engagement member is moved to an engagement release position where the engagement with the first engagement member is released,
When the work operating tool is moved from the first work operation position to the second work operation position, the second engagement member is moved from the engagement release position to a retracted position further moved in the engagement release direction. The combine according to claim 2, wherein the combine is configured. The combine according to claim 3, wherein the second direction is a direction opposite to the third direction. An engine as a drive source,
A control unit for controlling the start of the engine;
A detection device for detecting that the work operating tool is in the reverse operation position,
5. The engine according to claim 2, wherein the control unit makes it impossible to start the engine in a state where the detection device detects that the work operation tool is located at the reverse operation position. Combine according to any one of the above.