JP2012231713A - Waste straw treatment part structure of combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waste straw treatment part structure of a combine harvester adapted to prevent the exposure of an opening/closing lever from the rear end of a waste straw cutting part while maintaining the operability of the opening/closing lever for operating to open/close an opening/closing cover.SOLUTION: The waste straw treatment part structure of the combine harvester includes the waste straw cutting part 9, and the opening/closing cover 10 switched into a waste straw lead-in state of opening a waste straw lead-in port above the waste straw cutting part 9 around a turning shaft 12a and into a waste straw discharge state of closing the waste straw lead-in port. The turning shaft 12 of the opening/closing cover 10 is integrally provided with an operating arm 23, and the opening/closing lever 14 for operating to open/close the opening/closing cover 10 is pivoted in a swingable manner to the operating arm 23. An engaging part 23a and an engaged part 14a that can fix and release fixation of the relative attitude of the operating arm 23 and opening/closing lever 14 are provided at the operating arm 23 and the opening/closing lever 14 individually, and the opening/closing cover 10 can be switched into the waste straw lead-in state and the waste straw discharge state by the opening/closing lever 14 fixed in the relative attitude with the operating arm 23 by engaging the engaging part 23a with the engaged part 14a.

Description

  The present invention relates to a combine straw discharging process for switching the waste straw processing when cutting the waste straw transported from the threshing section by the waste straw cutting section and when dropping to the rear of the waste straw cutting section. Regarding the part structure.

  In the combine, there is a combine provided with a waste straw cutting part for cutting the waste straw in the waste straw carrying-out path from the threshing part. The waste wall cutting part has a waste wall introduction port above it, and an open / close lid for opening and closing the waste wall introduction port is provided. The state in which the open / close lid is closed is a waste wall discharge state in which the discharge wall is discharged backward, and the state in which the open / close cover is open is a discharge wall introduction state in which the discharge wall is introduced into the discharge wall cutting portion. Switching between the drainer discharge state and the drainer introduction state is performed by operating an opening / closing lever provided integrally with the rotation shaft of the opening / closing lid. The opening / closing lever 14 shown in FIG. 16 is swing-operated above the rotation shaft 12 of the opening / closing lid 10, and the operation direction of the opening / closing lever 14 is the same as the opening / closing direction of the opening / closing lid 10. On the other hand, the open / close lever shown in Patent Document 1 is operated to swing on the lower side of the pivot shaft of the open / close lid, and the operation direction of the open / close lever and the open / close direction of the open / close lid are opposite.

Japanese Patent No. 4235591

  The opening / closing lever 14 of the opening / closing lid 10 shown in FIG. 16 has an operation portion disposed above the opening / closing lid 10 in consideration of operability. For this reason, in the state in which the drainer is introduced with the opening / closing lid 10 open, the end of the opening / closing lever 14 may be exposed rearward from the rear end of the drainer cutting part 9 in a side view of the body. On the other hand, the open / close lever shown in Patent Document 1 is positioned at the rearmost end of the discharge wall cutting portion in the discharge state of the discharge wall with the open / close lid closed. At this time, the opening / closing lever is in a posture along the vertical direction, and is not exposed rearward from the rear end of the waste wall cutting portion.

  When the open / close lid is in the state of waste drain introduction or discharge of the waste wall, if a part of the open / close lever is exposed rearward from the rear end of the waste wall cutting part in the side view of the fuselage, the open / close lever There is a risk of contact. Further, even during maintenance of the drainer cutting part, if a part of the opening / closing lever is exposed rearward from the rear end of the draining wall cutting part, the opening / closing lever may come into contact with the operator. For this reason, it is preferable that the opening / closing lever is not exposed rearward from the rear end of the discharge wall cutting part in the side view of the machine body. As described above, it is also conceivable to shorten the lever length by curving the middle part of the opening / closing lever 14. However, as a result, the opening / closing lever 14 becomes shorter than usual, and as a result, the load required for the operation of the opening / closing lever 14 increases, and the operability of the opening / closing lever 14 decreases. Moreover, even when the swinging area of the opening / closing lever is set in a range in which the opening / closing lever is not exposed rearward from the rear end of the exhaust wall cutting portion as in Patent Document 1, the swinging area of the opening / closing lever is biased forward. As a result, the operability of the opening / closing lever is reduced.

  The present invention provides a waste drainer processing unit structure for a combine that can be stored in a position where the open / close lever is not exposed from the rear end of the drainer cutting part in a side view while maintaining the operability of the opening / closing lever for opening / closing the opening / closing lid. The purpose is to provide.

The first characterizing configuration of the waste straw processing unit structure of the combine according to the present invention is that a waste straw cutting unit that cuts the waste straw transported from the threshing part, and a waste straw introduction port above the waste straw cutting part is a rotation shaft. Open and close the front side by swinging the front side up and down, open the waste wall introduction port and introduce the waste wall into the waste wall cutting part, and close the waste wall introduction port and close the waste wall An open / close lid that switches to a discharge state of a discharge wall to be discharged to a combine waste discharger processing unit structure,
An operation arm is integrally provided on the pivot shaft of the opening / closing lid, and an opening / closing lever for operating the opening / closing of the opening / closing lid is pivotally supported on the operation arm so that the operation arm and the opening / closing lever An engaging part and an engaged part that can fix and release the relative posture are provided separately for the operation arm and the opening / closing lever,
The open / close lid is configured to be switchable between a drainer introduction state and a drainer discharge state by the opening / closing lever that engages the engaging portion and the engaged portion to fix the relative posture with the operation arm. It is in a certain point.

[Action]
When the waste straw is cut, the opening / closing lid is opened to enter the waste straw introduction state in which the waste straw is introduced into the waste straw cutting part. In order to open the open / close lid in the closed state, after engaging the engaging portion and the engaged portion respectively provided on the operation arm and the opening / closing lever to fix the relative posture between the operation arm and the opening / closing lever, Operate the open / close lever around the pivot axis of the open / close lid. When the opening / closing lever is operated in the opening direction of the opening / closing lid, the front side of the opening / closing lid is rotated upward around the rotation axis via the operation arm.

  When discharging the waste straw as it is without cutting, the opening lid is closed and the waste straw is discharged rearward. To close the open / close lid, after engaging the engaging portion and the engaged portion respectively provided on the operation arm and the opening / closing lever to fix the relative posture between the operation arm and the opening / closing lever, The opening / closing lever is rotated around the rotation axis of the opening / closing lid. When the opening / closing lever is operated in the closing direction of the opening / closing lid, the front side of the opening / closing lid is rotated downward around the rotation axis via the operation arm.

  On the other hand, when the opening / closing lid is maintained in the state where the draining wall is introduced or the draining wall is discharged, by disengaging the engaging portion and the engaged portion separately provided on the operation arm and the opening / closing lever, respectively. The relative posture between the open / close lever and the operation arm can be changed. Therefore, even if the open / close lid is in the waste wall introduced state or the waste wall discharge state, even if the open / close lever is located at an inconvenient position, such as when it is exposed rearward from the rear end of the waste wall cutting portion, By releasing the engagement state with the opening / closing lever, the opening / closing lever can be moved to a desired storage position in the rotation region while maintaining the positions of the opening / closing lid and the operation arm.

〔effect〕
In this way, when the open / close lid is in the state where the waste straw is introduced or discharged, only the position of the open / close lever can be changed without changing the position of the open / close lid and the operation arm. The opening / closing lever does not get in the way at times and the workability in the combine is improved.

  According to a second characteristic configuration of the combine drainer processing portion structure of the combine according to the present invention, the opening and closing lid is engaged with the operation arm by engaging the engagement portion and the engaged portion in the drainer introduction state or the drainer discharge state. The opening / closing lever having a fixed relative posture is configured to be exposed rearward from the rear end of the discharge wall cutting portion, and provided with a pivot portion for the operation arm at one end of the opening / closing lever, The engaging portion or the engaged portion is provided at a position between the end portion on the side and the end portion on the one side.

[Action]
When the opening / closing lid is in the state where the drainer is introduced or discharged, the opening / closing lever whose relative posture with the operation arm is fixed by the engagement between the engaging part and the engaged part is moved rearward from the rear end of the drainer cutting part. When exposed, the end (operating part) of the opening / closing lever is normally exposed, so the position of the operating part of the opening / closing lever is higher than the position of the pivotal support and engaging part (engaged part) of the opening / closing lever. Be behind. Here, if a pivotal support portion for the operation arm is provided at an intermediate portion of the opening / closing lever, and an engagement portion or an engaged portion is provided at one end portion, the position of the engagement portion is more forward than the position of the pivotal support portion. become. For this reason, the position at which the opening / closing lever, which has been released from the fixed posture relative to the operation arm, is supported by the pivot portion by its own weight is on the rear side of the machine body from the engaging portion (or the engaged portion).
On the other hand, as in this configuration, when a pivotal support portion for the operation arm is provided at one end of the opening / closing lever and an engaging portion or an engaged portion is provided in the intermediate portion of the opening / closing lever, the engaging portion and the engaged portion are provided. The position of the pivotal support portion of the open / close lever whose relative posture with the operation arm is fixed by the engagement with the joint portion is in front of the position of the engagement portion (or engaged portion). As a result, the position at which the opening / closing lever, which has been released from the fixed posture relative to the operation arm, is supported by the pivotal support portion by its own weight is located on the front side of the machine body relative to the engaging portion (or the engaged portion). That is, in this configuration, the pivotal support portion of the open / close lever is easily arranged in front of the fuselage.

〔effect〕
When the pivotal support portion of the opening / closing lever is disposed in front of the body, the entire opening / closing lever after being detached from the operating arm is also moved forward by the own weight. As a result, the opening / closing lever can be easily moved to the storage position on the front side of the fuselage from the rear end of the discharge wall cutting portion only by its own weight, and the operability of the opening / closing lever is improved.

It is a left view which shows the whole combine. It is a top view which shows the whole combine. It is a right view which shows the whole combine. It is a top view which shows the rear part of a combine. It is a sectional side view which shows the rear part of a combine. It is a side view which shows the waste straw cutting part of a state with the opening-and-closing lid | cover closed. It is a rear view which shows the engagement state of the operation arm and opening-and-closing lever in a waste wall cutting part. It is a side view which shows the state of an opening-and-closing lever when the opening-and-closing lid of a waste wall cutting part is closed, (a) is a state in which the opening-and-closing lever is engaged with the operation arm, (b) is an opening-and-closing lever in the operation arm Indicates the state of having left. It is a side view which shows the state of an opening-and-closing lever when the opening-and-closing lid of a waste wall cutting part is in the open state. It is a side view which shows the right rear part of a combine. It is a top view which shows the right rear part of a combine. It is a side view of the left rear cover part of a combine. It is a rear view of the left rear cover part of a combine. It is a side view which shows the state of an opening-and-closing lever when the opening-and-closing lid of the waste wall cutting part in another embodiment is closed, (a) is the state in which the opening-and-closing lever is engaged with the operation arm, (b) is opening and closing The lever is released from the operating arm. It is XV-XV arrow sectional drawing of Fig.14 (a). It is a side view which shows the open / close state of the opening-and-closing lid of the conventional waste wall cutting part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 3, the combine is configured to be self-propelled by the crawler traveling device 1 and is equipped with a riding-type driving unit 2, and the front part of the body frame 3 of the traveling unit. Of the reaping part 4 connected to the rear part of the machine body frame 3, the threshing device 5, the grain tank 6, the screw unloader 7, and the threshing device 5 (corresponding to the threshing part). It comprises a waste straw processing unit 8 connected to the rear part, and performs harvesting operations such as rice and wheat.

  That is, the cutting unit 4 includes a cutting unit frame 4a that extends from the body frame 3 so as to be swingable up and down, and the cutting unit frame 4a is swung by the elevating cylinder 30 so that the front end portion of the cutting unit 4 is moved. The weeding tool 4b provided at the lowering position moves up and down to the lower working position where the weeding tool 4b descends to the vicinity of the ground and the ascending non-working position where the weeding tool 4b rises higher from the ground. When the mowing unit 4 is lowered to the lowering work position and the traveling machine is run, the mowing unit 4 causes the planted culm to be harvested by the weeding tool 4b to be introduced into the path. The planted culm introduced into the pulling path is lifted by the device 4c and cut by the clipper type reaping device 4d, and the chopped mash is supplied to the threshing device 5 by the supply device 4e. The threshing device 5 threshs the supplied harvested cereal meal and sends the threshed grains to the grain tank 6. The screw type unloader 7 discharges the grain from the grain tank 6. The waste straw processing unit 8 shreds the threshing waste straw from the threshing device 5 in the slimming direction, or discharges it as it is without being shredded.

  As shown in FIGS. 4 and 5, the waste straw processing section 8 includes a waste straw cutting section 9 that cuts the waste straw, and an opening / closing lid 10 that opens and closes the waste straw introduction port 11 above the waste straw cutting section 9. Prepare. The waste wall cutting unit 9 includes a chopping case 90 connected to the rear part of the machine body of the threshing device 5, a pair of rotary shafts 92 and 93 provided rotatably inside the chopping case 90, and a side of the chopping case 90. A drive mechanism 94 provided outside is provided.

  The pair of rotating shafts 92 and 93 are rotatably supported on the left and right side walls 96 of the shredded case 90 in a line at a predetermined interval in the front-rear direction of the threshing device below the drainer introduction port 11. The rotary shaft 92 on the rear side of the threshing device of the pair of rotary shafts 92 and 93 is provided with a plurality of disc-shaped cutters 97 arranged at predetermined intervals in the axial direction of the rotary shaft 92 so as to be integrally rotatable. A plurality of disc-shaped supply bodies 98 are arranged in the axial direction of the rotating shaft 93 at a predetermined interval on the rotating shaft 93 on the front side of the threshing device of the rotating shafts 92, 93 so as to be integrally rotatable.

  The drive mechanism 94 shifts the driving force transmitted from the threshing device 5 and transmits it to the pair of rotating shafts 92 and 93 so that the pair of rotating shafts 92 and 93 rotate in the rotation directions A and B shown in FIG. In addition, the pair of rotating shafts 92 and 93 are driven so that the rotating shaft 92 provided with the cutter 97 rotates at a higher speed than the rotating shaft 93 provided with the supply body 98.

  Therefore, the waste straw cutting unit 9 opens and closes the waste straw introduction port 11 with the opening / closing lid 10, thereby releasing the threshing waste straw from the waste straw transporting part 20 as it is without being shredded. It switches to a release form and a shredded release form in which the threshing waste straw from the waste straw transporter 20 is shredded and released.

  In other words, when the opening / closing lid 10 is closed and the waste straw introduction port 11 is closed, the threshing waste straw dropped on the shredded case 90 by the waste straw transporting section 20 is dropped by the opening / closing lid 10 in the closed posture. In response, the shredded case 90 falls behind the threshing device 5.

  When the opening / closing lid 10 is opened and the waste straw introduction port 11 is opened, the threshing waste straw dropped on the shredding case 90 by the waste straw transporter 20 is transferred from the waste straw introduction port 11 to the shredding case 90. The threshing drainer falling inside and shredded inside the shredded case 90 is scraped between the supply body 98 and the cutter 97 by the supply body 98 rotating in the rotation direction B and the cutter 97 rotating in the rotation direction A. The chopping machine is shredded in the slimming direction with a plurality of cutters 97, the shredder is dropped from between the pair of rotating shafts 92, 93, and the rear of the threshing device 5 from the discharge port provided in the lower part of the shredding case 90. Let fall.

  As shown in FIGS. 6 and 7, the opening / closing lid 10 is opened / closed by operating an opening / closing lever 14 provided on the right side of the discharge wall cutting unit 9. The opening / closing lever 14 is connected to the opening / closing lid 10 via the rotation shaft 12. Specifically, the pivot shaft 12 in the horizontal direction of the machine body is integrally attached to the base end portion of the substantially rectangular opening / closing lid 10 that is long in the horizontal direction of the machine body. The pivot shaft 12 is pivotally supported on the upper rear part of the left and right side plates 18 (the left side plate is not shown) that forms the left and right side walls inside the exhaust wall cutting section 9, and the right end is on the right side. Projecting from the plate 18 to the side of the machine.

  An extension arm 13 extends from the right end of the rotating shaft 12, and an operation arm 23 formed substantially parallel to the right side plate 18 is fixed to the extension arm 13. A pin-shaped pivot 15 for the operation arm 23 is provided at one end 14 </ b> A of the opening / closing lever 14. The opening / closing lever 14 is substantially parallel to the right side plate 18, and rotates integrally with the opening / closing lid 10 via the operation arm 23.

  An engagement pin 23 a protrudes from the operation arm 23 toward the opening / closing lever 14. In the opening / closing lever 14, an engagement hole 14a corresponding to the engagement pin 23a is formed at a position between one end portion 14A and the other end portion 14B. When the engagement hole 14a of the open / close lever 14 is inserted into the engagement pin 23a of the operation arm 23 and the both are engaged, the open / close lever 14 and the operation arm 23 rotate integrally around the rotation shaft 12. The pivot 15 is provided with a spring S that biases the opening / closing lever 14 toward the operation arm 23, and the opening / closing lever 14 is moved closer to and away from the operation arm 23 while elastically deforming the spring S. The engagement pin 23a and the engagement hole 14a can be engaged and disengaged.

  With the engaging hole 14a of the opening / closing lever 14 engaged with the engaging pin 23a of the operating arm 23 and the relative posture between the operating arm 23 and the opening / closing lever 14 fixed, the opening / closing lever 14 is operated to rotate forward. Then, the opening / closing lid 10 is pivoted upward via the operation arm 23 to be in the state of introducing the waste straw. Similarly, when the opening / closing lever 14 is rotated to the rear side in the state where the engaging hole 14a is engaged with the engaging pin 23a and the relative posture between the operating arm 23 and the opening / closing lever 14 is fixed, the operation arm 23 is operated. The opening / closing lid 10 is rotated downward through the closed state and is in a closed drainer discharge state. On the other hand, when the engagement between the engagement pin 23a and the engagement hole 14a is released, the fixing of the relative posture between the operation arm 23 and the opening / closing lever 14 is also released.

As shown in FIGS. 6 and 7, the extension arm 13 of the rotating shaft 12 is provided with a tension coil spring 24 that urges the opening / closing lid 10 in the closing direction or the opening direction. The tension coil spring 24 has one end 24 a connected to a pin member 18 a provided on the right side plate 18, and the other end 24 b connected to a pin member 13 a provided on the side of the extension arm 13 of the rotating shaft 12. Has been.
When the opening / closing lid 10 is operated in the closing direction, the other end 24b of the tension coil spring 24 moves to the rear of the machine body as the posture of the extension arm 13 is changed, and the urging force of the tension coil spring 24 is in the closing direction of the opening / closing lid 10. work. On the other hand, when the opening / closing lid 10 is operated in the opening direction, the other end 24b of the tension coil spring 24 moves forward with the change in the posture of the extension arm 13, and the urging force of the tension coil spring 24 is applied to the opening / closing lid 10. Work in the opening direction. That is, the tension coil spring 24 acts so that the opening / closing state of the opening / closing lid 10 is maintained while assisting the opening / closing operation of the opening / closing lid 10.

As described above, the relative posture between the operation arm 23 and the opening / closing lever 14 is configured to be fixed and unfixable by the engagement pin 23a and the engagement hole 14a.
As shown in FIG. 8 (a), the end of the opening / closing lever 14 in which the relative posture with respect to the operation arm 23 is fixed by the engagement between the engagement pin 23a and the engagement hole 14a in the state of discharging the waste wall with the opening / closing lid 10 closed. 8B, when the engagement hole 14a of the opening / closing lever 14 is detached from the engagement pin 23a of the operation arm 23 even when the portion 14B is exposed rearward from the rear end of the discharge wall cutting portion 9 in a side view of the body. As shown in (b), the opening / closing lever 14 changes its posture in the vertical direction from the pivot portion 15 by its own weight. As a result, the opening / closing lever 14 is housed in a position where the opening / closing lever 10 is not exposed from the rear end of the discharge wall cutting portion 9 in a side view of the machine body even when the discharge wall discharge state is closed.

  8A, in the state where the opening / closing lid 10 is closed, the opening lever 10 is in the rear direction at the same angle as the opening / closing lid 10 so that the longitudinal direction of the opening / closing lever 14 continues to the opening / closing lid 10 inclined in the closed position. The posture is inclined downward. Accordingly, the end portion 14B can be easily held when the opening / closing lever 14 is operated. In addition, when changing from the state where the opening / closing lid 10 is closed to the state where the opening / closing lid 10 is opened, the opening / closing lever 14 which is oriented obliquely rearward and downward can be operated toward the front of the machine body. Easy to use. Furthermore, since the posture of the opening / closing lever 14 and the posture of the opening / closing lid 10 in the longitudinal direction of the machine body are substantially the same, there is no sense of incongruity due to the difference between the posture of the opening / closing lever 14 and the posture of the opening / closing lid 10, and the operability of the opening / closing lever 14 is good. . The opening / closing lever 14 shown in FIG. 8 (b) is in a position where it is not exposed from the rear end of the discharge wall cutting part 9 and is suspended from the pivot part 15. Therefore, even when the engagement hole 14a of the open / close lever 14 is engaged with the engagement pin 23a of the operation arm 23 again, the operation of moving the open / close lever 14 to the rear of the machine body with the end 14B can be easily performed. it can.

  FIG. 9 shows a state of introducing the waste straw with the opening / closing lid 10 of the waste straw cutting part 9 opened. As shown in FIG. 9, the open / close lever 14 is entirely located on the front side of the fuselage from the rear end of the discharge wall cutting unit 9 in the state where the open / close lid 10 is opened and the discharge wall is introduced. For this reason, when the opening / closing lid 10 is in the state where the waste straw is introduced, the opening / closing lever 14 may be held while being engaged with the operation arm 23.

  6-9, the opening / closing lever 14 has the pivot 15 provided closer to the end 14A out of the pivot 15 and the engagement hole 14a. Conversely, the engagement hole 14a is closer to the end 14A. It may be provided. However, in a state in which the end 14B of the opening / closing lever 14 whose relative posture with the operation arm 23 is fixed by the engagement between the engagement pin 23a and the engagement hole 14a is exposed rearward from the rear end of the discharge wall cutting portion 9. The pivoting portion 15 is provided near the one end portion 14A of the opening / closing lever 14, and the engagement hole 14a is provided between the one end portion 14A and the other end portion 14B. The pivot portion 15 is positioned on the front side of the body with respect to the engagement hole 14a. For this reason, the opening / closing lever 14 releases the fixation of the relative posture with the operation arm 23 (releases the engagement between the engagement pin 23a and the engagement hole 14a) and the front side of the fuselage from the rear end of the discharge wall cutting part 9. When moving to the storage position, the entire opening / closing lever 14 is easily moved to the front side of the machine body by its own weight.

  As shown in FIG. 3 and FIG. 10, the screw type unloader 7 is a screw conveyor type vertical feed cylinder 71 that lifts the grain from the bottom screw conveyor for transverse feed arranged at the inner bottom of the grain tank 6. , And a screw conveyor type transverse feed discharge cylinder 72 for horizontally feeding and discharging the grains from the vertical feed cylinder 71. The horizontal feed discharge cylinder 72 is swung up and down by a hydraulic cylinder 73, and the vertical feed cylinder 71 and the horizontal feed discharge cylinder 72 are rotated by a driving device 74 such as an electric motor so that the grains can be taken out to a desired place. is there. The small diameter gear 76 interlocked with the drive device 74 is engaged with the large diameter gear 77 fixed to the upper portion of the vertical feed cylinder 71, and the drive device 74 is interlocked with the lateral feed discharge cylinder 72.

  As shown in FIGS. 10 and 11, a plate-like cover 78 that covers the side portion of the large-diameter gear 77 is provided on the upper side of the discharge wall cutting portion 9. A downward-facing bracket 79a is extended on the top plate 79 of the waste wall conveying section 20, and the upper portion of the cover 78 is fixed to the bracket 79a with a bolt or the like. Further, as shown in FIG. 11, the cover 78 has a midway portion bent in such a direction that the rear side of the machine body covers the rear portion of the large-diameter gear 77 in plan view.

  As shown in FIGS. 1, 12, and 13, a threshing portion cover 25 and a rear cover 26 are provided adjacent to the front and rear of the fuselage as a cover on the left side of the combine. The rear cover 26 is located below the waste straw cutting part 9. The rear cover 26 is provided with a rear wall portion 27, and the side portion and the rear portion of the fuel tank 28 are covered by the rear cover 26. Accordingly, cracks and dust are likely to accumulate in the lower area inside the rear cover 26. For this reason, as shown in FIGS. 12 and 13, the rear cover 26 forms a space communicating with the field scene 3 without providing a bottom portion at the lower portion 26 </ b> A with the body frame 3. As a result, even if the waste straw is cut by the waste straw cutting unit 9, the cut straw, dust or the like does not accumulate on the lower portion 26A of the rear cover 26 and falls to the field.

[Second Embodiment]
In the present embodiment, as shown in FIGS. 14 and 15, the open / close lever 14 has a part of the base part side plate member 16 and a part of the operation part side plate member 17 joined by overlapping bolts 16 a. 14A and 15, when the relative posture between the operation arm 23 and the opening / closing lever 14 is fixed, the end surface 23 </ b> A of the operation arm 23 and the base side end surface 17 </ b> A of the operation unit side plate 17 of the opening / closing lever 14 are formed. It is configured to be in surface contact. For this reason, the operating arm 23 and the opening / closing lever 14 are engaged with the engaging pin 23a of the operating arm 23 and the engaging hole 14a of the opening / closing lever 14, and at the same time, the end surface 23A of the operating arm 23 and the operating portion side of the opening / closing lever 14 The base material side end surface 17A of the plate member 17 is brought into surface contact with and engaged. As a result, the area of the engaging portion between the opening / closing lever 14 and the operation arm 23 increases, and the load applied to the operation arm 23 when the opening / closing lever 14 is operated is dispersed. As a result, durability of the opening / closing lever 14 and the operation arm 23 is improved.

As shown in FIG. 14 (b), the opening / closing lever 14 whose fixed posture with respect to the operation arm 23 is released changes its posture in the vertical direction from the pivot portion 15 by its own weight.
The base side plate member 16 may be made of a hard material. However, if the base side plate member 16 is made of a material having elasticity, the opening / closing lever 14 is moved to the operation arm 23 while elastically deforming the base side plate member 16 as shown in FIG. Accordingly, the engagement pin 23a and the engagement hole 14a can be easily engaged and disengaged.
Further, the engaging portion and the engaged portion that are separately provided on the operation arm 23 and the opening / closing lever 14 are contacted between the end surface 23A of the operation arm 23 and the base side end surface 17A of the operation portion side plate 17 of the opening / closing lever 14. You may comprise only a part.
In FIG. 15, a plurality of washers (not shown) are inserted at the position of the spring S instead of the spring S, and the opening / closing lever 14 is moved close to and away from the operation arm 23 only by elastic deformation of the base side plate member 16. You may comprise so that it can do.

[Other Embodiments]
(1) In the above-described embodiment, an example in which the opening / closing lever 14 is a straight member has been described. However, the opening / closing lever 14 is not limited to a straight member, and may be configured such that a midway portion is bent.

(2) In the above embodiment, the opening / closing lever 14 is configured to be operated in the direction opposite to the swinging direction of the opening / closing lid 10, but the opening / closing lever 14 and the operation arm 23 are set upward, It may be configured to operate in the same direction as the swinging direction of the opening / closing lid 10.

(3) In the above embodiment, the configuration is such that when the engagement state of the opening / closing lever 14 and the operation arm 23 is released, the opening / closing lever 14 moves to the storage position by its own weight. The opening / closing lever 14 released from the combined state may be configured to be latched and stored and held in a locking portion separately provided on the side portion of the discharge wall cutting portion 9.

(4) In the above embodiment, an example has been shown in which the operating arm 23 is provided with the engaging portion (engaging pin) 23a and the opening / closing lever 14 is provided with the engaged portion (engaging hole) 14a. An engaging portion may be provided on the opening / closing lever 14 and an engaged portion may be provided on the operation arm 23.

(5) In the above embodiment, the open / close lever 14 engaged with the operation arm 23 is exposed rearward from the rear end of the discharge wall cutting portion 9 only when the open / close lid 10 is in the discharge wall discharge state. However, when the opening / closing lid 10 is in the state where the waste straw is introduced, the opening / closing lever 14 engaged with the operation arm 23 is exposed rearward from the rear end of the waste wall cutting section 9, and The open / close lever 14 engaged with the arm 23 may be configured not to be exposed rearward from the rear end of the discharge wall cutting unit 9. Further, the opening / closing lid 10 may be configured such that the opening / closing lever 14 engaged with the operation arm 23 is exposed rearward from the rear end of the discharge wall cutting portion 9 in both the discharge wall introduction state and the discharge wall discharge state.

(6) In the above embodiment, the opening / closing lever 14 of the opening / closing lid 10 is arranged on the right side of the fuselage with respect to the waste wall cutting part 9, but the opening / closing lever 14 is arranged on the left side of the machine body with respect to the draining wall cutting part 9. May be.

  The present invention relates to a combine straw removal processing unit, and various types can be used as the waste straw treatment unit.

DESCRIPTION OF SYMBOLS 5 Threshing part 8 Waste wall processing part 9 Waste wall cutting part 10 Opening / closing lid 11 Waste wall introduction port 12 Rotating shaft 14 Opening / closing lever 14A End part 14B End part 14a Engagement hole (engaged part)
15 pivot part 16 base side plate 17 operation part side plate 17A base side end face 23 operation arm 23a engagement pin (engagement part)
23A end face

Claims (2)

Opening and closing the waste straw cutting part that cuts the waste straw conveyed from the threshing part, and opening and closing the waste straw introduction port above the waste straw cutting part by swinging the front side up and down around the rotation axis. An opening / closing lid that opens and closes the discharge wall introduction state for introducing the discharge wall to the discharge wall cutting portion and switches to the discharge wall discharge state for closing the discharge wall introduction port and discharging the discharge wall backward. It is a structure of a waste processing unit for a combine,
An operation arm is integrally provided on the pivot shaft of the opening / closing lid, and an opening / closing lever for operating the opening / closing of the opening / closing lid is pivotally supported on the operation arm so that the operation arm and the opening / closing lever An engaging part and an engaged part that can fix and release the relative posture are provided separately for the operation arm and the opening / closing lever,
The open / close lid is configured to be switchable between a drainer introduction state and a drainer discharge state by the opening / closing lever that engages the engaging portion and the engaged portion to fix the relative posture with the operation arm. The structure of the waste straw processing part of the existing combine. In the state where the opening / closing lid is in the state of introducing the draining wall or in the state of discharging the draining wall, the opening / closing lever whose relative posture with the operation arm is fixed by the engagement between the engaging portion and the engaged portion is It is configured to be exposed rearward from the rear end, and a pivotal support portion for the operation arm is provided at one end portion of the opening / closing lever, and at a position between the other end portion and the one end portion. The combine waster processing part structure of the combine of Claim 1 which provided the said engaging part or the said to-be-engaged part.

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