JP2012085597A - Combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the posture of a waste straw-conveying mechanism 62 to be switched between a conveying posture and a clogging-removing posture by a simple operation in a combine harvester.SOLUTION: The combine harvester includes the waste straw-conveying mechanism 62 for conveying the waste straw after threshing, a waste straw-nipping body 603 for nipping the waste straw by facing the waste straw-conveying mechanism 62, a waste straw cutter 63 for cutting the waste straw, and a waste straw-switching plate 650 for opening or closing a waste straw-conveying passage 648 directed to the waste straw cutter 63. The waste straw-conveying mechanism 62 is constituted so that the posture can be switched between the conveying posture facing the waste straw-nipping body 603, and the clogging-removing posture apart from the waste straw-nipping body 603. A switching operation tool 626 for carrying out the posture-switching operation of the waste straw-conveying mechanism 62 is installed in the waste straw-conveying mechanism 62 so as to be operated from the rear side of the waste straw-conveying mechanism 62. The waste straw-switching plate 650 is formed into a shape extended to the switching operation tool 626 in the opened state of the waste straw-conveying passage 648 in the side view.

Description

  The present invention relates to a combine for threshing a harvested cereal and selecting and collecting fine grains from the cereal.

  Conventionally, a combine is a waste transporting mechanism that transports the waste after threshing, a waste holding body for sandwiching the waste against the waste transporting mechanism, a waste cutter for cutting the waste, An evacuation switching plate that opens and closes an evacuation conveyance path toward the evacuation cutter. The evacuation transport mechanism can be rotated to change its posture between a transport posture facing the evacuation pinching body and a clogging release posture away from the evacuation pinching body by an upward and downward rotation operation of a switching operation lever protruding toward the feed chain side. (For example, refer patent document 1 etc.). In the configuration of Patent Literature 1, the squeezing and transporting mechanism is rotated in a direction away from the squeezing / clamping body by an upward turning operation of the switching operation lever. In this state, the waste trapped between the waste transport mechanism and the waste sandwiching body is pulled out and removed.

JP 2007-236305 A

  However, in the conventional configuration, when the switching operation lever is operated, a mashing upper cover that covers the upper part of the scouring conveyance mechanism or a threshing upper cover that covers the upper part of the threshing device is provided in advance so as not to hinder the operation. There was room for improvement in that the operation had to be open and complicated. In addition, since the switch operating lever protrudes to the feed chain side, if the clogging occurs during the harvesting operation, the operator should not step on the uncut grain culm on the field and move to the feed chain side of the combine. There is also a problem that it is troublesome to move and operate the switching operation lever.

  Therefore, the present invention has a technical problem to provide a combine that improves the current situation as described above.

  The invention according to claim 1 is a waste transporting mechanism for transporting the waste after threshing, a waste holding body for holding the waste against the waste transporting mechanism, and cutting the waste. An evacuation cutter, and an evacuation switching plate that opens and closes an evacuation conveyance path toward the evacuation cutter, wherein the evacuation conveyance mechanism includes a conveyance posture facing the evacuation pinching body, and the evacuation The combiner is configured to be able to change the posture to a clogging release posture away from the sandwiching body, and a switching operation tool for changing the posture of the waste transport mechanism is included in the waste transport mechanism. It is provided so that it can be operated from the rear side, and the waste switching plate is formed in a shape extending toward the switching operation tool in a state in which the waste transport passage is opened in a side view. Is.

  According to a second aspect of the present invention, there is provided the combine according to the first aspect, wherein the switching operation tool is a trigger body that can be moved in the front-rear direction, a hand that is located behind the trigger body and the trigger body. It has a grip body that can be gripped by

  According to a third aspect of the present invention, in the combine described in the second aspect, the rejection switching plate is abbreviated in a side view so that a top portion is formed on a side far from the rejection cutter, with a front-rear middle portion as a boundary. It is bent in the shape of a letter, and the distal end side of the evacuation switching plate faces the switching operation tool in a state where the evacuation conveyance path is opened.

  According to the invention of claim 1, a waste transporting mechanism for transporting the waste after threshing, a waste catching body for sandwiching the waste while facing the waste transporting mechanism, and the waste An evacuation cutter for cutting, and an evacuation switching plate for opening and closing an evacuation conveyance path toward the evacuation cutter, wherein the evacuation conveyance mechanism includes a conveying posture facing the evacuation pinching body, and A combiner configured to be able to change a posture to a clogging release posture away from the evacuation pinching body, wherein the evacuation conveyance mechanism includes a switching operation tool for changing the posture of the evacuation conveyance mechanism. It is provided so that it can be operated from the rear side of the transport mechanism, and the rejection switching plate is formed in a shape extending toward the switching operation tool in a state in which the rejection transport passage is opened in a side view. When removing the clogging of the waste transport mechanism, For example, the switching operation tool can be operated from the rear side of the waste transporting mechanism without opening the waste upper cover body or the like covering the upper side of the waste transporting mechanism in advance. it can. Even if the clogging occurs during the harvesting operation, it is not necessary to move the combine to, for example, the feed chain side, and there is no possibility of stepping over the uncut grain culm in the field. Further, when the clogging release operation is performed, the hand can be reached with the switching operation tool in a state where the hand is placed on the rejection switching plate. That is, since the rejection switching plate is in an open posture as if indicating the position of the switching operation tool, the switching operation tool can be easily operated by placing a hand on the rejection switching plate. Contributes to improved operability of tools. When operating the switching operation tool, there is less risk of inadvertently touching the waste transport mechanism.

  According to a second aspect of the present invention, in the combine according to the first aspect, the switching operation tool includes a trigger body that can be moved in the front-rear direction, and a trigger body that is located on the rear side of the trigger body. A grip body that is gripped by a hand. When releasing the clogging of the waste chain, the trigger body is held in front of an operator by gripping the switching operation tool (the trigger body and the grip body). The evacuation transport mechanism can be changed to a clogging release posture simply by performing a very natural operation of pulling. Therefore, many people can perform the clogging release operation easily and smoothly, and provide a user-friendly switching operation tool.

  According to a third aspect of the present invention, in the combine described in the second aspect, the rejection switching plate is abbreviated in a side view so that a top portion is formed on a side far from the rejection cutter with a front-rear middle portion as a boundary. It is bent in a square shape, and the distal end side of the evacuation switching plate faces the switching operation tool in a state in which the evacuation conveyance path is opened. Therefore, when operating the switching operation tool, It is easy to place a hand on the tip side of the rejection switching plate. This also helps to improve after operability.

It is a left view of the combine for 4 line cutting. It is a top view of a combine. It is a power transmission system diagram of a combine. It is a top view which shows the attachment structure of a waste chain. It is a side view which shows the positional relationship of a waste chain and a switching board. It is a rear view of a waste chain. It is the perspective view of the waste chain seen from back diagonally upper right side. It is side surface explanatory drawing of a switching operation tool. It is a rear view of a combine.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, the left side in the forward direction of the traveling machine body 1 is simply referred to as the left side, and the right side in the forward direction is also simply referred to as the right side.

(1). First, the overall structure of the combine will be described with reference mainly to FIGS. 1 and 2. As shown in FIGS. 1 and 2, the combine according to the embodiment includes a traveling machine body 1 supported by a pair of left and right traveling crawlers 2 (traveling portions). At the front part of the traveling machine body 1, a four-row mowing device 3 for mowing cereals is mounted by a single-acting hoisting hydraulic cylinder 4 so as to be adjustable up and down around the mowing pivot fulcrum shaft 4a. . A threshing device 5 having a feed chain 6 and a grain tank 7 for storing grain after threshing are mounted on the traveling machine body 1 side by side. In addition, the threshing apparatus 5 is arrange | positioned at the left side toward the advancing direction of the traveling body 1, and the Glen tank 7 is arrange | positioned at the right side toward the advancing direction of the traveling body 1 (refer FIG. 2).

  A discharge auger 8 for discharging the grains in the grain tank 7 from the rear to the top of the grain tank 7 is provided. Centering on the vertical auger 8a of the discharge auger 8, the front part of the glen tank 8 can be rotated to the side of the machine body. A driving unit 10 is provided in front of the Glen tank 7 and on the right front of the traveling machine body 1. The driving unit 10 includes an operation device including a step 10a on which an operator gets on, a driver's seat 10b, a steering handle 10c, various operation levers, switches, and the like. An engine 20 as a power source is disposed at a location below the driver's seat 10b in the traveling machine body 1. A mission case 19 is disposed in front of the engine 20 and between the traveling crawlers 2 for appropriately shifting the power from the engine 20 and transmitting it to the traveling crawlers 2.

  As shown in FIGS. 1 and 2, left and right track frames 21 are arranged on the lower surface side of the traveling machine body 1. The track frame 21 includes a drive sprocket 22 that transmits the power of the engine 20 to the traveling crawler 2, a tension roller 23 that maintains the tension of the traveling crawler 2, and a plurality of track rollers that hold the ground side of the traveling crawler 2 in a grounded state. 24 is provided. The driving sprocket 22 supports the front side of the traveling crawler 2, the tension roller 23 supports the rear side of the traveling crawler 2, and the track roller 24 supports the grounding side of the traveling crawler 2.

  As shown in FIGS. 1 and 2, the reaping device 3 includes a four-row culm pulling device 31 that causes uncut cereals in the field and a clipper type that cuts the stock of uncut cereals in the field. A cutting blade device 32 and a culm transport device 33 that transports the chopped culm from the culm pulling device 31 to the front end (feed start end side) of the feed chain 6 are provided. While driving the traveling crawler 2 with the engine 20 and moving in the field, the reaping device 3 is driven to continuously shave the uncut grain culm on the field. In this case, the cereal pulling device 31 causes uncut cereals in the field, the cutting blade device 32 cuts the stock of the uncut cereal, and the cereal pulling device 31 cuts the harvested cereal at the front end of the feed chain 6. The kite is transported. In addition, in front of the lower part of the cereal habit raising device 31, a weeding body 38a for 4 ridges for weeding uncut cereal cereals in the field is projected.

  In the threshing device 5, a handling cylinder 51 for threshing threshing, an oscillating sorting board 52 that sorts threshing falling below the handling cylinder 51, and a tang fan 53 that supplies sorting wind to the oscillating sorting board 52. And a dust exhaust fan 61 that discharges dust at the rear of the swing sorter 52 to the outside of the apparatus. A receiving net 60 that divides the handling cylinder 51 and the swing sorter 52 is stretched below the handling cylinder 51. The stocker side of the cereals conveyed from the reaping device 3 by the cereal conveying device 33 is inherited by the feed chain 6 and is nipped and conveyed. Then, the tip side of the cereal is carried into a handling chamber (not shown) of the threshing device 5 and threshed by the handling cylinder 51. In addition, the handling cylinder rotating shaft 158 (refer FIG. 3) which rotates the handling cylinder 51 is extended along the conveyance direction (in other words, the advancing direction of the traveling body 1) of the grain by the feed chain 6.

  As shown in FIGS. 1 and 2, a waste chain 62 as a waste transport mechanism is disposed on the rear end side (feed end side) of the feed chain 6. The waste passed through the feed chain 6 from the rear end side of the feed chain 6 (the grain from which the grain has been threshed) is discharged to the rear of the traveling machine body 1 in a long state, or the rear side of the threshing device 5 After being cut to a suitable length by the waste cutter 63 provided at the front, the paper is discharged to the lower rear of the traveling machine body 1.

  On the lower side of the swing sorter 52, a first conveyor 55 for picking up the grain (first thing) sorted by the swing sorter 52, and grains such as grain, swarf, and branch-branch are mixed. A second conveyor 56 for taking out the second item is provided. In addition, from the front side in the forward direction of the traveling machine body 1, the first conveyor 55 and the second conveyor 56 are arranged in the order above the rear part of the traveling crawler 2 on the upper surface side of the traveling machine body 1 in a side view.

  The swing sorting board 52 is configured to swing-sort (specific gravity sort) the cereal grains that have fallen below the handling cylinder 51. The grain (first thing) that has fallen from the swing sorter 52 is removed from the grain by the sorting air from the Kara fan 53 and falls first onto the conveyor 55. A threshing cylinder 57 extending in the vertical direction is connected to a terminal portion of the first conveyor 55 that protrudes outward from the right side wall of the threshing device 5 near the grain tank 7. The grain taken out first from the conveyor 55 is carried into the Glen tank 7 by the cereal conveyor 159 (see FIG. 3) in the cereal cylinder 57 and collected inside the Glen tank 7.

  The rocking sorter 52 is configured to drop a second thing such as a grain with a branch stem on the second conveyor 56 by rocking sorting (specific gravity sorting). The second product taken out by the second conveyor 56 is returned to the upper surface side of the swing sorter 52 through the reduction conveyor 160 (see FIG. 3) in the reduction cylinder 58 and the reprocessing device 59, and is re-sorted. The Further, swarf, dust and the like during cerealing from the handling drum 51 are discharged from the rear portion of the traveling machine body 1 toward the field by the sorting air from the Kara fan 53 and the dust suction and exhaust action of the dust fan 61. . A grain sorting mechanism 65 (see FIG. 1) is configured by the above-described swing sorter 52, red pepper fan 53, first conveyor 55, second conveyor 56, dust exhaust fan 61, and the like.

(2). Next, the power transmission system of the combine will be described with reference to FIG. One of the power from the engine 20 is branched and transmitted in two directions, the traveling crawler 2 (including the reaping device 3) and the threshing device 5. Other power from the engine 20 is transmitted toward the discharge auger 8. The branching power from the engine 20 to the traveling crawler 2 is once transmitted to the transmission case 19 via the pulley / belt transmission system. In this case, the branching power from the engine 20 is appropriately shifted in the mission case 19 and the like, and is output to the left and right drive sprockets 22 via the drive output shafts 151 protruding from the mission case 19 to the left and right. In the mission case 19, a cutting PTO shaft 152 protrudes separately from the drive output shaft 151. The shifting power transmitted from the transmission case 19 to the cutting PTO shaft 152 is cut by the cutting clutch 153 and then cut through the cutting input shaft 154 in the horizontally long cutting rotation fulcrum shaft 4a (see FIG. 1). It is transmitted to each of the devices 31 to 33 of the device 3. In this case, each of the devices 31 to 33 of the reaping device 3 is driven at a speed synchronized with the traveling speed (vehicle speed) of the traveling machine body 1.

  Of the power from the engine 20, the branching power toward the threshing device 5 is transmitted via the threshing clutch 155 to the red pepper fan shaft 156 for rotationally driving the red pepper fan 53. A part of the power transmitted to the Kara fan shaft 156 is transmitted to the cylinder input shaft 157 via the pulley / belt transmission system, and the cylinder rotation shaft 158 and the exhaust chain 62 are connected to the cylinder input shaft 157. Is transmitted to.

  Further, from the Kara fan shaft 156, the first conveyor 55, the cereal conveyor 159, the second conveyor 56, the reduction conveyor 160, the reprocessing drum 161, and the swing sorter 52 are swung through a pulley / belt transmission system. Power is also transmitted to the shaft 162, the dust removal shaft 163 of the dust removal fan 61, and the waste cutter 63. The branching power via the dust removal shaft 163 is transmitted to the feed chain 6 via the feed chain shaft 164. The power from the barrel input shaft 157 can be transmitted to the cutting input shaft 154 via a pouring clutch 165 that transmits a constant rotational force to the cutting device 3. That is, by directly transmitting the power from the engine 20 to the reaping device 3 without going through the mission case 19, the reaping device 3 is forcibly driven at a constant high speed regardless of whether the vehicle speed is fast or slow. Is possible.

  The power from the engine 20 toward the discharge auger 8 is transmitted through the Glen input gear mechanism 166 and the power interrupting auger clutch 167 to the bottom conveyor 168 in the Glen tank 7 and the vertical conveyor 169 in the vertical auger 8a in the discharge auger 8. Next, power is transmitted to the discharge conveyor 171 in the horizontal auger in the discharge auger 8 via the connection screw 170.

  The power transmission system of the grain sorting mechanism 65 will be described in more detail with reference to FIGS. A transmission upstream belt 244 is wound around a tang pulley pulley 241 provided on the tang fan fan shaft 156 and one of two first pulleys 243 provided on the first shaft 242 which is the rotation shaft of the first conveyor 55. It has been. A first tension pulley 245 that tensions the transmission upstream belt 244 is pressed from the outside.

  A transmission downstream belt 246 is wound around the other pulley 243. The transmission downstream belt 246 includes a second pulley 248 provided on a second shaft 247 that is a rotation shaft of the second conveyor 56 and a two-way relay pulley 250 fixed to a relay shaft 249 located above the second shaft 247. And one of two dust collection drive pulleys 252 provided on the dust collection drive shaft 251 in the vicinity of the dust collection shaft 163. A second tension pulley 253 that tensions the first pulley 243 and the second pulley 248 of the transmission downstream belt 246 is pressed from the outside. A swing belt 255 is wound around the other of the two relay pulleys 250 and a swing pulley 254 provided on the swing shaft 162. A cutter input belt 258 is wound around the other side of the dust drive pulley 252 and a cutter input pulley 257 provided on a cutter input shaft 256 that is a rotation shaft of the waste cutter 63.

  The dust drive shaft 251 is connected to the dust shaft 163 and the counter shaft 260 via a dust gear mechanism 259 so that power can be transmitted. The rotational power transmitted to the dust drive shaft 251 is transmitted to the dust shaft 163 and the counter shaft 260 via the dust gear mechanism 259, and is transmitted from the counter shaft 260 to the feed chain 6 via the feed chain shaft 164. Communicated.

(3). Next, a detailed structure of the waste chain 62 and its surroundings will be described with reference to FIGS. 4 to 9. As shown in FIGS. 4 and 5, a fourth upper surface pipe 601 having a U-shape in plan view is provided above the fourth basket in the threshing device 5. A laterally long horizontal beam pipe 602 is provided on the rear end side of the left and right pipe portions extending rearward in the fourth upper surface pipe 601. In the fourth upper surface pipe 601 and the horizontal beam pipe 602, a waste chain 62 as a waste transport mechanism extends from the rear end side (feed end side) of the feed chain 6 toward the left and right center side of the rear portion of the traveling machine body 1. In addition, the suspension is supported so that the posture can be changed between a conveyance posture for conveying the waste and a clogging release posture. On the lower side of the waste chain 62, a waste pinching body 603 for sandwiching the waste while facing the waste chain 62 is disposed. The upper part of the waste chain 62 is covered with a waste upper cover body 600.

  In the embodiment, the pivot brackets 604 are respectively suspended from the middle portion of the left pipe portion of the fourth upper surface pipe 601 and the longitudinal middle portion of the crosspiece pipe 602. An arm bracket 605 corresponding to each pivot bracket 604 is provided on the main body of the waste chain 62 so as to protrude in the same direction. An arm bracket 605 on the transport chain 62 side is pivotally supported on a pivot bracket 604 on each pipe 601 and 602 side by a pivot pin 606 extending parallel to the transport direction of the reject chain 62. . The pair of pivot pins 606 are located concentrically parallel to the conveying direction of the reject chain 62. The axial center A of both the pivot pins 606 extends in an inclined manner from the left front to the right rear in plan view, in parallel with the conveying direction of the reject chain 62. Accordingly, the reject chain 62 is separated from the reject pinch 603 by turning downward and around the axis A of the pivot pins 606 with the conveying posture facing the reject pinch 603 and turning upward. The posture can be changed to the clogging release posture. The evacuation pinching body 603 is always urged toward the lower surface side of the evacuation chain 62 by the evacuation pinching spring 607. Between the lower surface side of the waste chain 62 and the waste clamping body 603, the waste chain is inherited from the feed chain 6 and is nipped and conveyed.

  A waste drive case 608 is disposed on the front end side (feed start end side) of the waste chain 62. A transmission case 609 is disposed on the rear end side (feed end side) of the waste chain 62. The transmission case 609 is provided with a waste assisting tine 610 that is arranged in parallel with the waste chain 62 and transports the tip of the waste. The transmission case 609 is disposed in front of a chain tension roller 62 a provided on the feed end side of the waste chain 62. A driving force is transmitted from the waste chain 62 to the waste assisting tine 610 via a transmission case 609 in front of the chain tension roller 62a. While the waste chain 62 and the waste clamping body 603 sandwich and convey the stock side of the waste inherited from the feed chain 6, the waste tip side is conveyed by the waste assisting tine 610. Note that one end side of the connecting frame body 619 is attached to the middle part of the main body of the waste chain 62. The middle part of the main body of the exclusion assist tine 610 is attached to the other end side of the connecting frame body 619. Therefore, the waste chain 62 and the waste assisting tine 610 are connected by the transmission case 609 and the connecting frame body 619 so as to rotate integrally with each other in a state of being parallel to each other.

  As shown in FIGS. 4 to 7, the rear end side of the handling cylinder rotating shaft 158 protrudes rearward from the outlet side plate 611 on the rear side in the handling chamber incorporating the handling cylinder 51. A barrel output pulley 612 is fixed to the rear end side of the barrel rotating shaft 158. In addition, a waste driving pulley 614 is fixed to a forward projecting waste driving shaft 613 that is pivotally supported by the waste driving case 608. A waste drive belt 616 is wound around the barrel output pulley 612 and the waste drive pulley 614 via a tension roller 615. The waste chain 62 is driven via the waste drive belt 616 in conjunction with the rotational drive of the handling cylinder 51. The tension roller 615 is pivotally supported on one end side of a tension arm 617 that is pivotally supported on the rear surface side of the outlet side plate 611. The other end side of the tension arm 617 is connected to a fixed portion of the threshing device 5 via a tension spring 618. A tension force is applied to the exclusion drive belt 616 by the urging force of the tension spring 618.

  In addition, since the exclusion drive pulley 614 is positioned in front of the axis A of the pivot pins 606 in a plan view, when the exclusion chain 62 is rotated so as to be in the clogging release posture, the exclusion drive pulley 614 moves downward to loosen the tension of the exclusion drive belt 616. Therefore, when the waste chain 62 is brought into the clogging release posture, there is very little possibility that the waste drive belt 616 is pulled to obstruct the rotation, and the waste drive belt 616 is twisted and removed.

  As shown in FIGS. 4 to 8, an L-shaped fixed plate plate 621 in plan view is provided at the center of the rear surface of the main body of the waste chain 62. The left and right horizontal plate portions of the fixed plate plate 621 are connected to one end side of a clogging release spring 622 that urges the waste chain 62 in a direction away from the waste clamping body 603. The other end side of the clogging release spring 622 is hooked on the middle part of the horizontal beam pipe 602. The waste chain 62 is always urged by the clogging release spring 622 in a direction away from the waste pinching body 603, that is, in a direction of turning upward around the axis A of both pivot pins 606.

  On the lower surface side of the front and rear horizontal portions of the fixed plate plate 621, an engagement recess 623 that is notched in a downward opening shape is formed. The engaging recess 623 has a divergent shape from the top to the bottom. A bracket piece 624 that protrudes downward from the horizontal beam pipe 602 is located in the vicinity of the front and rear horizontal portions of the fixed plate plate 621. A left and right lateral lock pin 625 is fixed to the bracket piece 624. The lock pin 625 is configured to be able to be engaged and disengaged relative to the engagement recess 623 of the fixed plate plate 621. With the locking pin 625 of the bracket piece 624 engaged (contacted) with the engaging recess 623 of the fixed plate plate 621 from above, the rejecting chain 62 takes a conveying posture facing the rejecting pinching body 603. become.

  As shown in FIGS. 4 to 8, a switching operation tool 626 for changing the posture of the waste chain 62 from the rear side of the waste chain 62 is provided on the opposite side of the body of the waste chain 62 from the arm bracket 605. It is provided so that it can be operated. The switching operation tool 626 includes a trigger body 627 that can be moved in the front-rear direction, and a grip body 628 that is positioned on the rear side of the trigger body 627 and is grasped by the hand together with the trigger body 627.

  The trigger body 627 includes a gripping arm portion 627a extending in parallel with the left and right horizontal portion of the fixed plate plate 621 and an interlocking arm portion 627b penetrating the left and right horizontal portion of the fixed plate plate 621 so as to be slidable back and forth. It is in the shape of a letter. A flange piece 629 for restricting the forward operation of the trigger body 627 is fixed to the rear side of the horizontal portion of the fixed plate plate 621 in the interlocking arm portion 627b. In the interlocking arm portion 627b, a return spring 630 is fitted in front of the left and right horizontal portions of the fixed plate plate 621. A seat plate piece 631 for preventing the return spring 630 from coming off is fixed to the front side of the return spring 630. The trigger body 627 is always urged in the forward direction by the elastic restoring force of the return spring 630. On the foremost end side of the interlocking arm portion 627b, a locking hook portion 632 having a substantially U-shape in side view that can be engaged with and disengaged from the lock pin 625 is provided.

  With the engagement recess 623 of the fixed plate plate 621 engaged (contacted) from above with the lock pin 625 of the bracket piece 624, the trigger body 627 is engaged with the lock pin 625 by the elastic biasing force of the return spring 630. By engaging the stop hook portion 632, the conveying chain 62 is maintained in the conveying posture facing the rejection pinching body 603 (locked to the conveying posture).

  Further, as shown in FIG. 8, the lower end surface 632 a of the front half of the locking hook portion 632 is formed as an inclined surface with a front height and a low height. When the waste chain 62 is rotated downward so as to change its posture to the transport posture, the return spring while the front half lower end surface 632a of the locking hook portion 632 biased forward slides on the outer peripheral surface of the lock pin 625. The locking hook portion 632 and thus the trigger body 627 moves backward against the elastic restoring force of 630. When the forward concave portion of the locking hook portion 632 faces the lock pin 625, the locking hook portion 632 moves forward by the elastic restoring force of the return spring 630 and engages with the lock pin 625, and the waste chain 62 Is locked in the transport position. That is, when changing the posture of the waste chain 62 to the transport posture, it is not necessary to operate the trigger body 627, and it is only necessary to rotate the waste chain 62 downward.

  On the other hand, the grip body 628 is behind the grip arm portion 627a in the trigger body 627, and has a handle portion 628a extending in parallel with the grip arm portion 627a and a support portion 628b fixed to the front and rear horizontal portions of the fixed plate plate 621. Thus, the shape is substantially L-shaped in plan view. The grip arm portion 627a of the trigger body 627 and the handle portion 628a of the grip body 628 are arranged in parallel, so that the grip arm portion 627a and the handle portion 628a can be gripped together.

  In the above configuration, if the waste is clogged or pinched between the waste chain 62 and the waste holding body 603 during or after the harvesting operation, if the operator holds and operates the switching operation tool 626, both The evacuation chain 62 rotates upward about the axis of the pivot pin 606, and the evacuation chain 62 is lifted upward and away from the evacuation pinching body 603. As a result, the waste that is clogged or pinched between the waste chain 62 and the waste holding body 603 can be removed.

  Now, as shown in FIGS. 5 and 9, an upper and lower opening type box-shaped waste case 640 is provided at the rear of the threshing device 5 and below the rear half of the waste chain 62. In the waste case 640, a waste cutter 63 for cutting the waste is disposed. The rejection cutter 63 includes a front cutter shaft 641 and a cutter input shaft 256, and disc-shaped disk blades 643 and 644. A plurality of low-speed disk blades 643 are arranged at regular intervals on the front cutter shaft 641, and a plurality of high-speed disk blades 644 are arranged at regular intervals on the cutter input shaft 256. The front cutter shaft 641 and the cutter input shaft 256 are rotatably supported on the left and right side plates of the evacuation case 640. The front cutter shaft 641 and the cutter input shaft 256 extend in parallel in the left-right direction in a state where the low-speed disk blades 643 and the high-speed disk blades 644 are alternately arranged and the outer peripheral portions are overlapped in a side view. The waste conveyed to the inside from the waste inlet 646 formed on the upper surface side of the waste case 640 by the waste chain 62 is cut to an appropriate length by the disc blades 643 and 644, and then discharged. It is discharged out of the machine from a discharge outlet 647 formed on the lower surface side of the bag case 640. A passage from the lower side of the waste chain 62 to the interior of the waste case 640 through the waste inlet 646 constitutes a waste transport passage 648 toward the waste cutter 63.

  A cutter input pulley 257 is fixed to a tip end portion of the cutter input shaft 256 that protrudes outward from the left side plate of the evacuation case 640 (see FIG. 3). A cutter input belt 258 is wound around the cutter input pulley 257 and the other of the two dust discharge drive pulleys 252. The rotational power transmitted to the dust drive shaft 251 is transmitted to the cutter input shaft 256 via the cutter input belt 258. Although not shown in detail, the rotational power of the cutter input shaft 256 is transmitted to the front cutter shaft 641 via the sprocket and chain transmission system due to the meshing of these spur gears 213 and 214.

  On the side of the waste outlet 646 of the waste case 640, a waste switching plate 650 for opening and closing the waste transport passage 648 is provided. The rejection switching plate 650 is connected to the rejection case 640 so as to be vertically openable and closable by pivotally attaching a rear end portion thereof to the left and right side plates of the rejection case 640 with a rotation support shaft 651. Although details are not shown, the rotation support shaft 651 of the rejection switching plate 650 is interlocked and connected to a switching plate operating lever disposed behind the operation unit 10 via a connecting mechanism such as a wire or a link. .

  In this case, by operating the switching plate operating lever in the opening direction and rotating the evacuation switching plate 650 upward via the coupling mechanism, the evacuation transport passage 648 (the evacuation inlet 646) is opened and the evacuation is performed. The waste is conveyed from the chain 62 into the waste case 640. Further, by operating the switching plate operating lever in the closing direction and rotating the evacuation switching plate 650 downward via the coupling mechanism, the evacuation transport passage 648 (the evacuation inlet 646) is closed, and the evacuation chain. The waste is discharged from 62 as it is toward the field, or is sent to a binding machine disposed behind the waste chain.

  As shown in FIG. 5, the evacuation switching plate 650 is formed in a shape that extends toward the switching operation tool 626 in a state in which the evacuation conveyance passage 648 is opened in a side view. In other words, the rejection switching plate 650 is bent in a generally letter-like shape when viewed from the side so that a top portion 650a (boundary) is formed on the side far from the rejection cutter 63 with the front-rear middle part as a boundary. The distal end side of the evacuation switching plate 650 is opposed to the switching operation tool 626 with the evacuation conveyance path 648 opened. Note that a portion of the waste switching plate 650 on the right side of the tip is cut out so as not to interfere with the waste chain 62 in a state where the waste transport passage 648 is opened. Accordingly, the portion facing the switching operation tool 626 in a state in which the waste transporting passage 648 is opened is a portion closer to the left end of the waste switching plate 650.

  With the above configuration, when releasing the clogging of the waste chain 62, the switching operation tool 626 can be connected to the waste chain without opening the waste upper cover body 600 that covers the top of the waste chain 62 in advance. It can be operated from the rear side of 62, and the number of clogging release operations can be reduced. Even if the clogging occurs during the harvesting operation, there is no need to move to the feed chain 6 side of the combine and there is no possibility of stepping over the uncut grain culm in the field. Further, when the clogging release operation is performed, the hand can be reached to the switching operation tool 626 in a state where the hand is placed on the exclusion switching plate 650. In other words, since the waste switching plate 650 is in an open posture as if indicating the position of the switching operation tool 626, the switching operation tool 626 can be easily operated by placing a hand on the waste switching plate 650. This contributes to improved operability of 626. When operating the switching operation tool 626, the risk of inadvertently touching the waste chain 62 is reduced.

  Furthermore, the switching operation tool 626 includes a trigger body 627 that can be moved in the front-rear direction, and a grip body 628 that is located on the rear side of the trigger body 627 and is gripped by the hand. When releasing the clogging of the waste chain 62, it is possible to remove the waste simply by grasping the switching operation tool 626 (the trigger body 627 and the grip body 628) and pulling the trigger body 627 in front of the operator. The posture of the chain 62 can be changed to the clogging release posture. Therefore, many people can perform the clogging release operation easily and smoothly, and provide a user-friendly switching operation tool.

  The rejection switching plate 650 is bent in a substantially square shape when viewed from the side so that a top portion 650a is formed on the side far from the rejection cutter 63, with the front and rear halfway as a boundary, and the tip of the rejection switching plate 650 Since the side faces the switching operation tool 626 with the waste conveyance path 648 opened, it is easy to place a hand on the distal end side of the waste switching plate 650 when operating the switching operation tool 626. This also helps to improve after operability.

  Note that the present invention is not limited to the above-described embodiment, and can be embodied in various forms. The configuration of each part is not limited to the illustrated embodiment, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Traveling machine body 5 Threshing apparatus 62 Exclusion chain 63 Exclusion cutter 603 Exclusion clamp body 626 Switching operation tool 627 Trigger body 628 Grip body 640 Exclusion case 646 Exclusion conveyance path 650 Exclusion conveyance path 650 Exclusion switching plate

Claims (3)

A waste transporting mechanism for transporting the waste after threshing, a waste clamping body for sandwiching the waste against the waste transporting mechanism, a waste cutter for cutting the waste, and the waste A discharge switching plate that opens and closes a discharge transfer path toward the cutter, and the discharge transfer mechanism includes a transfer posture facing the discharge pinch body and a clogging release posture separating from the discharge pinch body. And a combine that can be changed in posture,
The waste transport mechanism is provided with a switching operation tool for changing the posture of the waste transport mechanism so as to be operated from the rear side of the waste transport mechanism. In view, it is formed in a shape extending toward the switching operation tool in a state in which the waste transport path is opened.
Combine. The switching operation tool includes a trigger body that can be moved in the front-rear direction, and a grip body that is located on the rear side of the trigger body and is gripped with the trigger body.
The combine according to claim 1. The rejection switching plate is bent in a substantially square shape in a side view so that a top portion is formed on the side far from the rejection cutter, with a front-rear middle portion as a boundary, and the distal end side of the rejection switching plate Is opposed to the switching operation tool in a state in which the waste transport path is opened.
The combine according to claim 2.

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