JP2020048423A - Combine harvester - Google Patents

Abstract

To provide a combine harvester capable of preventing a waste straw cutting device from being brought into contact with a waste straw carrier device when switching the waste straw cutting device in between a work position and a non-work position in a state that a waste straw frame is elevated.SOLUTION: A combine harvester includes: a lock mechanism 130 for restricting oscillation from a work position to a non-work position side of a waste straw cutting device, and oscillation from a non-work position to a work position side of the waste straw cutting device; and a linkage mechanism 137 for linking restriction operation of the lock mechanism 130 with elevating operation of a waste straw frame 61. The linkage mechanism 137 includes: an arm 138 rockable separately from the waste straw frame 61 around a forward and backward facing shaft center Y2; an action member 139 moving integrally with the waste straw frame 61 and pressing the arm 138; and a connection member 140 for connecting the arm 138 with the lock mechanism 130.SELECTED DRAWING: Figure 21

Description

  The present invention provides a feed chain for pinching and transporting a harvested grain culm, a threshing device for threshing a harvested grain culm transported by a feed chain having a handling drum, and a feed chain connected to a rear portion of the threshing device and from a feed chain. A straw transport device that receives the straw after threshing and pinches and transports it backwards, a straw frame that supports the straw transport device and that can swing up and down around the longitudinal axis, and a portion below the straw transport device. And a waste cutting device for cutting the waste conveyed by the waste conveying device.

  For example, a combine described in Patent Literature 1 is already known as the above combine. The combine described in Patent Literature 1 has a feed chain ("Feed Chain [9]" in the literature) for pinching and transporting the harvested culm, and a handling cylinder ("Handling Body [11]" in the literature) and a feed chain. Threshing device (in the literature, "threshing device [10]") for threshing the harvested culm conveyed by the hull, and connected to the rear of the threshing device and receiving the straw after threshing from the feed chain and moving backward. A straw conveying device for pinching and conveying (“the straw conveying device [12]” in the literature), and supporting the straw conveying device and moving up and down around the longitudinal axis (“the swing axis [Y2]” in the literature). A swingable straw frame (in the literature, “straw frame [50]”), and a straw cutting device that is provided below the straw transport device and that cuts the straw transported by the straw transport device ( In the literature, Sectional apparatus and [28] "), are provided. The waste cutting device is capable of swinging around a vertical axis between a working position for receiving the straw from the straw conveying device and performing a cutting process, and a non-working position located away from the working position. It is configured.

JP 2018-102145 A

  In the combine described in Patent Literature 1, the height position of the transport terminal side end of the straw transport device becomes lower as the straw frame rises. For this reason, if it is attempted to switch the straw cutting device between the working position and the non-working position while the straw frame is raised, the straw cutting device comes into contact with the transport end side end of the straw transporting device. There is a fear.

  In view of the above situation, when the straw cutting device is switched between the working position and the non-working position with the straw frame raised, it is necessary to prevent the straw cutting device from contacting the straw conveying device. There is a demand for a combine that can be used.

  The present invention is characterized in that a feed chain for pinching and transporting a harvested grain culm, a threshing device having a handling cylinder and threshing a harvested grain culm transported by the feed chain, and a rear end of the threshing device are connected to each other. A straw conveying device that receives the straw after the threshing process from the feed chain and pinches and conveys the same backward, and a straw frame that supports the straw conveying device and can swing up and down around a longitudinal axis, A straw cutting device that is provided below the straw transport device and that cuts the straw transported by the straw transport device, is provided, and the straw cutting device is arranged around an up-down axis. A combine configured to be able to swing between a work position for receiving the straw from the straw transport device and performing a cutting process, and a non-work position located away from the work position. A lock mechanism that regulates swinging of the straw cutting device from the working position to the non-working position side and swinging of the straw cutting device from the non-working position to the working position side. An interlocking mechanism for interlocking the regulating operation of the lock mechanism with the raising operation of the straw frame, wherein the interlocking mechanism is capable of swinging around the longitudinal axis separately from the straw frame. And an operating member that moves integrally with the straw frame and pushes the arm, and a linking member that links the arm and the lock mechanism, wherein the action member pushes the arm. The arm pulls the link member so that the lock mechanism regulates the swing of the straw cutting device in conjunction with the lifting of the straw frame.

  According to this characteristic configuration, when the straw frame rises, the action member comes into contact with the arm, and the arm pulls the link member, so that the swing of the straw cutting device interlocks with the rise of the straw frame. It will be regulated by the lock mechanism. Thereby, when the straw cutting device is switched between the working position and the non-working position in a state where the straw frame is raised, it is possible to prevent the straw cutting device from contacting the straw conveying device. . In addition, the lock mechanism does not forget to restrict the swing of the straw cutting device when the straw frame is raised. Moreover, the interlocking mechanism interlocks the regulating operation of the lock mechanism with the raising operation of the straw frame by a simple operation such as contact of the action member with the arm or pulling of the interlocking member by the arm. The structure can be simplified and the interlocking mechanism can be reliably operated.

  Further, in the present invention, if the rising position of the straw frame is equal to or lower than a reference position, the action member does not act on the arm, and if the rising position of the straw frame exceeds the reference position, It is preferred that the arm be pushed.

  Here, when the rising position of the straw frame is relatively low, even if the straw cutting device is switched between the working position and the non-working position, the transport end side end of the straw conveying device contacts the straw cutting device. do not do. On the other hand, when the raising position of the straw frame is relatively high, when the straw cutting device is switched between the working position and the non-working position, the transport end side end of the straw conveying device comes into contact with the straw cutting device. According to this characteristic configuration, when the rising position of the straw frame is relatively lower than the reference position, the operating member does not contact the arm, so that the swing of the straw cutting device is not restricted by the lock mechanism. On the other hand, when the rising position of the straw frame is relatively higher than the reference position, since the action member contacts the arm, the rocking of the straw cutting device is restricted by the lock mechanism. This makes it possible to appropriately set whether or not to restrict the swing of the straw cutting device in accordance with the level of the rising position of the straw frame.

  Further, in the present invention, it is preferable that a positioning member for positioning the arm at the initial position is provided.

  According to this characteristic configuration, it is possible to prevent malfunction of the interlocking mechanism without the arm being displaced from the initial position.

  Further, in the present invention, it is preferable that a stay for supporting an end on the arm side of the linking member is provided, and the positioning member is supported on the stay.

  According to this characteristic configuration, a stay can be used as a member for supporting the positioning member.

It is a left view which shows a combine. It is a top view which shows a combine. It is a left view which shows a threshing apparatus. It is a rear view showing the threshing device in the state where the handling drum frame was lowered. It is a rear view which shows the threshing apparatus in the state where the handling cylinder frame rose. It is a front view which shows a handling cylinder lock mechanism. It is a perspective view which shows the structure around a support shaft. It is a disassembled perspective view which shows the attachment structure of a stock source cover. FIG. 4 is a rear cross-sectional view illustrating a mounting structure of a stock cover. It is a left view which shows the rear part of a threshing apparatus, and a straw conveyance apparatus. FIG. 4 is a perspective view showing a left upper frame, a right upper frame, a straw frame, a first rear upper frame, and a second rear upper frame. It is a top view which shows the rear part of a threshing apparatus, a straw conveying apparatus, and a straw cutting apparatus. It is a rear view showing the state where a handling drum frame and a straw frame are located in a descent position. It is a rear view showing the state where a straw frame and a handling cylinder frame are located in the 2nd rise position. FIG. 4 is an exploded perspective view showing a left upper frame, a straw frame, and a first rear upper frame. It is a disassembled perspective view which shows a straw frame and a right upper frame. It is a top view showing an auxiliary cover. It is a rear sectional view showing an auxiliary cover. It is a rear view showing the state where a straw frame is located in a descent position. It is a rear view showing the state where the straw frame is located in the 2nd rise position. It is a rear view showing the state where the straw frame is located in the 1st rise position. It is a rear view showing a lock mechanism and an interlocking mechanism. FIG. 3 is an exploded perspective view showing a lock mechanism. It is a top view which shows the lock mechanism in the state where the straw frame is located in the range of more than a lowering position and less than two raising positions, and the straw cutting apparatus is located in a working position. It is a left view which shows the lock mechanism in the state in which the straw frame is located in the range more than a lowering position and less than the 2nd raising position, and the straw cutting apparatus is located in a working position. It is a left view which shows the lock mechanism in the state in which the straw frame is located in a 1st raising position, and the straw cutting apparatus is located in a working position. It is a figure which shows the relationship of the position of a straw frame, the state of a lock mechanism, and the possibility of switching of a straw cutting apparatus. It is a figure which shows whether the change of the straw cutting apparatus is possible in the state where the straw frame is located in a descent position. It is a figure showing whether switching of a straw cutting device is possible in a state where a straw frame is located in the 2nd rise position. It is a figure which shows whether the switching of the straw cutting apparatus is possible in the state where the straw frame is located in the 1st raising position. It is a lock mechanism of a regulation state, and is a top view showing the state where the straw cutting device is located in the work position. It is a lock mechanism of a regulation state, and is a top view showing the state where the straw cutting device is located in the 1st lock position. It is a lock mechanism of a regulation state, and is a top view showing the state where a straw cutting device is located in a non-working position. It is a lock mechanism of a regulation state, and is a top view showing the state where the straw cutting device is located in the 2nd lock position. It is a figure which shows the relationship between the position of a straw cutting device, and the swing regulation of the straw cutting device by a lock mechanism. It is a perspective view which shows a straw receiving cover. It is a left view sectional view showing a straw receiving cover. It is a top view showing a switching board. FIG. 39 is a sectional view taken along the line XXXIX-XXXIX in FIG. 38.

  An embodiment for carrying out the present invention will be described with reference to the drawings.

[Overall structure of combine]
FIG. 1 and FIG. 2 show a self-contained combine. The combine is provided with a body frame 1 and a crawler traveling device 2. In front of the traveling machine body, a cutting section 3 for cutting planted grain culms is provided. An operating cabin 4 is provided on the right side in the front part of the traveling body. The driving cabin 4 includes an operating unit 5 on which a driver rides, and a cabin 6 that covers the operating unit 5. An engine (not shown) is provided below the operation unit 5.

  A grain storage tank 7 for storing grains after threshing is provided behind the operation cabin 4. A grain discharging device 8 for discharging the grains in the grain storage tank 7 is provided. A threshing device 9 is provided to the left of the grain storage tank 7. On the left side of the threshing device 9, a feed chain 10 for pinching and transporting the harvested grain culm, and a rail stand 11 for sandwiching the harvested grain culm together with the feed chain 10 at a position vertically opposed to the feed chain 10 are provided. I have. The threshing device 9 has a handling cylinder 12 and performs threshing on the harvested culm transported by the feed chain 10. At the rear of the threshing device 9, a straw transporting device 13 is continuously provided. The straw conveying device 13 receives the straw after the threshing process from the feed chain 10 and pinches and conveys the straw backward. A straw cutting device 14 that cuts the straw conveyed by the straw transport device 13 is provided below the straw transport device 13.

[Waste cutting device]
As shown in FIG. 2 and FIG. 3, the straw cutting device 14 receives a straw from the straw transporting device 13 and performs a cutting process around the vertical axis (swinging axis) Z1. And a non-working position located away from the working position. The waste cutting device 14 is provided with a cutter 15 for cutting the waste, a cover 16 for covering the cutter 15, and a switching plate 17. In a portion of the cover 16 located above the cutter 15, an input port 16a into which waste straw is input is formed.

  The switching plate 17 is configured to be vertically swingable openable and closable between an open position for opening the inlet 16a and a closed position for closing the inlet 16a. When the switching plate 17 is open, the straw conveyed by the straw conveyer 13 is thrown into the slot 16a and cut by the cutter 15. When the switching plate 17 is closed, the straw transported by the straw transporting device 13 slides on the upper surface of the switching plate 17 and falls to the ground.

[Threshing device]
As shown in FIG. 3, a handling room 18 is formed above the threshing device 9. A handling room cover 19 constituting a top plate of the threshing device 9 is provided. The handling chamber 18 is provided with a handling cylinder 12 rotatable around a longitudinal axis (rotation axis) Y1. The handling cylinder 12 is rotatably supported by front and rear walls 21 forming the handling chamber 18 via a handling cylinder shaft 20. A receiving net 22 is provided below the handling cylinder 12. A dust discharge fan 23 for discharging dust to the outside is provided behind the handling cylinder 12.

  In the lower part of the threshing device 9, a rocking sorting device 24 for rocking and sorting the objects to be sorted, a Karamin 25 for blowing a sorting wind to the rocking sorting device 24, and the first grain (single grain, etc.) And a second collection unit 27 for collecting a second grain (eg, a grain with a branch spike). The first collecting section 26 is provided with a first screw 28 for conveying the first grain to the right. There is provided a fryer 29 for frying and transporting the first grain from the first screw 28 toward the grain storage tank 7. The fryer 29 is linked to the right end of the first screw 28. The second collection unit 27 is provided with a second screw 30 that conveys the second grain to the right. A second reduction device 31 is provided for reducing the second grain from the second screw 30 to the swing sorting device 24. The second reduction device 31 is operatively connected to the right end of the second screw 30.

  As shown in FIGS. 3 to 5, the wall 21 includes a movable wall 32 and a fixed wall 33. The handling cylinder shaft 20 is provided between the front movable wall 32 and the rear movable wall 32. The movable wall 32 is supported by a fixed wall 33 via an arm 34 such that the movable wall 32 can swing up and down around a longitudinal axis (swing axis) Y2. A transmission shaft 35 for transmitting the power of the engine is provided between the front fixed wall 33 and the rear fixed wall 33.

  Upper frames 36 and 37 extending in the front-rear direction across the front part and the rear part of the threshing device 9 are provided respectively on the left and right sides of the upper part of the threshing device 9. The left upper frame 36 is provided over the front movable wall 32 and the rear movable wall 32, and extends to a position on the rear side of the rear wall 21. The right upper frame 37 is provided over the front fixed wall 33 and the rear fixed wall 33, and extends to a position on the rear side of the rear wall 21.

  A handling cylinder frame 38 that supports the handling cylinder 12 and that can swing up and down around a swing axis Y2 located on the inner side (right side) of the fuselage is provided. The handling cylinder frame 38 includes a front movable wall 32, a rear movable wall 32, and a left upper frame 36. The handle cylinder frame 38 is configured to be able to swing up and down around the swing axis Y2 such that the lateral end (left end) on the side where the upper frame 36 on the left side is located moves up and down.

  A cylinder 39 for vertically driving the handling cylinder frame 38 is provided. The cylinder 39 is provided over the rear arm 34 and the rear fixed wall 33. In the present embodiment, the cylinder 39 is configured by an electric hydraulic cylinder. A gas damper 40 that urges the handling cylinder frame 38 upward is provided. The gas damper 40 is provided over the rear movable wall 32 and the rear fixed wall 33.

  As shown in FIGS. 4 to 7, a pair of front and rear handle cylinder lock mechanisms 41 that hold the handling cylinder 12 at a threshing position where the threshing process is performed are provided. The front handle cylinder locking mechanism 41 is provided over the front movable wall 32 and the front fixed wall 33. The rear cylinder lock mechanism 41 is provided over the rear movable wall 32 and the rear fixed wall 33. The handling cylinder lock mechanism 41 includes a plate 42 and a roller 43. The plate 42 is supported by the movable wall 32 so as to be swingable around a longitudinal axis (swing axis) Y3. A hook 42 a that can be engaged with the roller 43 is formed at the tip of the plate 42. A motor (not shown) for swinging and driving the plate 42 is provided. The roller 43 is supported by the fixed wall 33 via a support shaft 44. By engaging the hook portion 42a with the roller 43, the handling cylinder 12 is held at the threshing position. When the engagement of the hook portion 42a with the roller 43 is released, the handle cylinder frame 38 is swung upward by the cylinder 39 and the gas damper 40.

  6 and 7 show the structure around the front support shaft 44. FIG. Although not shown, the structure around the rear support shaft 44 is the same as the structure around the front support shaft 44. The support shaft 44 is supported by the fixed wall 33 via a support plate 45. A support plate 46 that supports the tip of the support shaft 44 is provided. The support plate 46 is fixed to the fixed wall 33 by bolts. A connection plate 47 that connects the support plate 45 and the support plate 46 is provided. The connection plate 47 is configured to cover the roller 43 from above. The connecting plate 47 is provided with an upper inclined portion 47a inclined downward left and a lower inclined portion 47b inclined downward left.

  According to such a configuration, the structure for supporting the support shaft 44 can be reinforced by the connection plate 47. In addition, the connecting plate 47 can prevent the straw waste from hitting the roller 43. Here, when the straw waste falls onto the connecting plate 47, it slides down along the upper inclined portion 47a and the lower inclined portion 47b. This makes it difficult for the waste to accumulate on the connecting plate 47 even if it falls on the connecting plate 47.

  As shown in FIGS. 8 and 9, a stock cover 49 is attached to the rear end of the rail base cover 48 that covers the rail base 11 from the lateral outside (left side). At the rear end of the rail base cover 48, an attachment seat 50 to which the stock cover 49 is attached is provided. The mounting seat 50 is provided inside the rail base cover 48. The mounting seat 50 is provided with a support shaft 51 that supports the stock cover 49. The mounting seat 50 and the support shaft 51 do not protrude below the lower end of the rail base cover 48.

  As shown in FIGS. 10 to 12, at the rear upper part of the threshing device 9, a first rear upper frame 52 protruding rearward from a portion (left side) on the side where the left upper frame 36 is located is provided. I have. The first rear upper frame 52 is formed in a substantially U-shape that projects rearward in a side view. The straw conveyed by the straw conveying device 13 passes through the space inside the curved portion of the first rear upper frame 52. The first rear upper frame 52 is supported on the rear end of the left side wall of the threshing device 9 via a plate 53. The first rear upper frame 52 is configured by a plurality of tubular members (three pipes in the present embodiment) arranged side by side in the left-right direction. The first rear upper frame 52 includes a main pipe 54, a left auxiliary pipe 55 provided on the left of the main pipe 54, and a right auxiliary pipe 56 provided on the right of the main pipe 54. I have. The main pipe 54, the left auxiliary pipe 55, and the right auxiliary pipe 56 are configured by round pipes. A plate 53 is fixed to a front end of a lower portion of the main pipe 54 and a front end of a lower portion of the left auxiliary pipe 55. The plate 53 is fixed to the rear end of the left side wall of the threshing device 9 by bolts.

  A horizontal frame 57 is provided which is connected to the rear end of the right upper frame 37 and extends rightward from the rear end of the right upper frame 37. The right end of the horizontal frame 57 is supported by a column 58 erected on the body frame 1. A connection frame 59 that connects the right upper frame 37 and the horizontal frame 57 is provided.

  In the rear upper part of the threshing device 9, a second rear upper frame 60 is provided to extend to the left and right portions of the threshing device 9. The second rear upper frame 60 is configured by a round pipe. The second rear upper frame 60 is located above the straw conveying device 13 and is provided over the first rear upper frame 52 and the horizontal frame 57. The second rear upper frame 60 is formed in a shape that bypasses the straw transport device 13 so that the straw transport device 13 that rises with the straw frame 61 does not interfere with the second rear upper frame 60. Specifically, the second rear upper frame 60 is formed in a curved shape bulging rearward. An end of the second rear upper frame 60 on the first rear upper frame 52 side is bolted to a stay 62 fixed to the main pipe 54, and an end of the second rear upper frame 60 on the side frame 57 side. The part is bolted to a stay 63 fixed to the horizontal frame 57. That is, the first rear upper frame 52 is connected to the right upper frame 37 via the second rear upper frame 60 and the horizontal frame 57.

  Here, the left upper frame 36 is connected to the main pipe 54 via a lock mechanism 112, and the second rear upper frame 60 is connected via a stay 63. The front end of the upper part of the left auxiliary pipe 55 extends to a part of the main pipe 54 between the connecting part to which the left upper frame 36 is connected and the stay 62 to which the second rear upper frame 60 is connected. ing. The right auxiliary pipe 56 is provided over a portion of the main pipe 54 corresponding to a member to be inserted 105 described later and a portion corresponding to a stay 62 to which the second rear upper frame 60 is connected.

[Straw conveying device]
As shown in FIGS. 10, 12 and 13, the straw transporting device 13 is provided so as to be inclined such that the transport end of the straw transporting device 13 is located on the right side as viewed from above. The straw transport device 13 includes a stock transport device 65 for nipping and transporting the stock portion of the straw, and a head transport device 66 for locking and transporting the tip portion of the straw. The stock transfer device 65 includes a stock transfer chain 67 with a protrusion and a straw rail 68. The drainage rail 68 is disposed below the stock transport chain 67 so as to face the lower path portion of the stock transport chain 67. A front portion of the straw rail 68 is supported by a front support member 69 from below. The rear part of the drainage rail 68 is supported from below by a rear support member 70. The tip transfer device 66 is provided with a tip transfer chain 71 with a tine.

  A belt transmission mechanism 72 that transmits the power of the transmission shaft 35 to the input shaft of the straw transporting device 13 is provided across the transmission shaft 35 and the input shaft (not shown) of the straw transporting device 13. The belt transmission mechanism 72 includes a driving pulley 73, a driven pulley 74, a transmission belt 75, a tension arm 76, a swing tension pulley 77, and a fixed tension pulley 78. The drive pulley 73 is provided at a portion of the transmission shaft 35 that projects rearward from the rear fixed wall 33. The driven pulley 74 is provided on the input shaft of the straw conveying device 13. The transmission belt 75 is wound around a driving pulley 73 and a driven pulley 74.

  The tension arm 76 is swingably supported by the transmission shaft 35. The tension arm 76 is urged to swing toward the tension applying side by a tension spring 76a. A swing tension pulley 77 is rotatably supported at the distal end of the tension arm 76. The swing tension pulley 77 is in contact with the upper path portion of the transmission belt 75 from above to apply tension to the transmission belt 75. The swing tension pulley 77 acts on a portion of the transmission belt 75 extending between the fixed tension pulley 78 and the drive pulley 73.

  The fixed tension pulley 78 is in contact with the upper path portion of the transmission belt 75 from below to apply tension to the transmission belt 75. As a result, the transmission belt 75 is wound around the fixed tension pulley 78 from above, and it is difficult for straw chips falling from above to the fixed tension pulley 78 to accumulate on the fixed tension pulley 78. The fixed tension pulley 78 acts on a portion of the transmission belt 75 closer to the drive pulley 73 between the drive pulley 73 and the driven pulley 74.

  The fixed tension pulley 78 is supported by a stay 80 via a support shaft 79. The stay 80 is provided so as to hang down from the front end (front frame portion 84) of the straw frame 61. The support shaft 79 is detachably bolted to the stay 80 so as to protrude forward from the stay 80.

[Straw frame]
As shown in FIGS. 11 to 16, a straw frame 61 that supports the straw conveying device 13 is provided. The straw conveying device 13 is suspended from and supported by the straw frame 61 via a front stay 81 and a rear stay 82. The straw frame 61 is configured to be able to swing up and down around a swing axis Y2 located on the lateral inner side (right side) of the body. The drainage frame 61 is configured by a frame-shaped frame. The straw frame 61 includes a base frame portion 83, a front frame portion 84, a rear frame portion 85, and a free end frame portion 86. The front frame portion 84, the rear frame portion 85 and the free end frame portion 86 are formed by bending a single round pipe. The base end of the front frame portion 84 is bent rearward. The base end of the rear frame portion 85 is bent forward. A space is provided in the front-rear direction between the base end of the front frame 84 and the base end of the rear frame 85. The base frame 83 is provided over the base of the front frame 84 and the base of the rear frame 85. The base frame 83 is fixed to the base of the front frame 84 and the base of the rear frame 85 from below. The base end frame portion 83 is configured by a square pipe.

  The straw frame 61 is supported by a pair of front and rear stays 88 via a support shaft 87 so as to be able to swing up and down around the swing axis Y2. The support shaft 87 is supported by a stay 89 fixed to the base frame 83. The front and rear stays 88 are bolted to a stay 90 fixed to the right upper frame 37. The straw frame 61 is supported by the upper frame 37 on the right side via a pair of front and rear stays 88 and 90. A connecting rod 91 is provided to connect the front stay 88 and the rear stay 88 to each other.

  A connection plate 92 (connection member) is provided for connecting the handle cylinder frame 38 and the straw frame 61 in a detachable manner. The connection plate 92 is provided over the body lateral outside end (left end) of the handling drum frame 38 and the body lateral outside end (left end) of the straw discharge frame 61. Specifically, the connection plate 92 is provided over the left upper frame 36 and the free end frame portion 86.

  The left end of the connection plate 92 is detachably fixed to a stay 93 fixed to the left upper frame 36 by a plurality of (three in this embodiment) bolts 94. The right end of the connection plate 92 is detachably fixed to a plurality of (three in this embodiment) stays 95 fixed to the free end frame portion 86 by a plurality of (three in this embodiment) bolts 96. Have been. A bolt hole 92 a for a bolt 94 and a bolt hole 92 b for a bolt 96 are formed in the connection plate 92. The stay 93 is formed by a longitudinal member extending in the front-rear direction along the left upper frame 36. A stay 155 is fixed to the rear end of the stay 93 by bolts so as to protrude rearward from the rear end of the stay 93.

  Thus, the straw frame 61 is connected to the upper frame 36 on the left side via the connecting plate 92, and is supported by the upper frame 37 on the right side via a pair of front and rear stays 88 and 90. That is, the straw frame 61 is provided over the upper frame 36 on the left and the upper frame 37 on the right.

  In a state in which the handling cylinder frame 38 and the straw frame 61 are connected by the connection plate 92, the handling cylinder frame 38 and the straw frame 61 can be vertically swung by the cylinder 39. The straw frame 61 is configured to be able to ascend from a position where the straw transport device 13 transports the straw (down position, see FIG. 19) to a position where the straw transport device 13 does not transport the straw. . In the present embodiment, a first ascending position (see FIG. 21) and a second ascending position (see FIG. 20) lower than the first ascending position are set as the ascending limit of the straw frame 61. The first ascending position is a position where the clogging of the grain stalk in the handling drum 12 can be removed. The second ascending position is a position where the clogging of the straw in the straw transport device 13 can be removed, and the transport end portion of the straw transport device 13 does not contact the straw cutting device 14. .

[Handling room cover]
As shown in FIGS. 11 to 15, the handling room cover 19 covers the handling cylinder 12, the handling cylinder frame 38, and the straw discharge frame 61 from above. The handling room cover 19 includes a left handling room cover 97 and a right handling room cover 98. The left handling room cover 97 is configured to be capable of vertically swinging open / close around a longitudinal axis (swing axis) Y4 located on the lateral outer side (left side) of the machine body. The left handling room cover 97 is supported by the left upper frame 36 via a support member 99. A plurality of dust valves (not shown) are provided on the back surface of the left handling chamber cover 97 at intervals in the front-rear direction. The right handling room cover 98 is supported by the upper frame 37 on the right side so as to be able to swing up and down around a longitudinal axis (swing axis) Y5 located on the inner side (right side) of the fuselage. The right handling room cover 98 is provided such that its left end rides on the right end of the left handling room cover 97.

  As shown in FIGS. 17 and 18, the left-handroom cover 97 includes a main body 100 and an auxiliary cover 101 (cover member). The portion of the left-handroom cover 97 corresponding to the connection plate 92 is constituted by an auxiliary cover 101 which is a cover member different from the main body 100 of the left-handroom cover 97. A cutout 100a is formed in a portion of the main body 100 corresponding to the auxiliary cover 101. The notch 100a is formed in a substantially rectangular shape that opens laterally outward (leftward) of the fuselage and is long in the front-rear direction in plan view. The auxiliary cover 101 is detachably fixed to the connection plate 92 by a plurality of (two in this embodiment) bolts 102. The auxiliary cover 101 has a first bent portion 101b which is bent downward from the right end of the upper surface portion 101a, and a second bent portion which is bent from the lower end of the first bent portion 101b inwardly to the lateral side of the body (rightward). 101c. A bolt hole 101d for the bolt 102 is formed in the second bent portion 101c. A cutout portion 101e is formed in the second bent portion 101c so as not to interfere with the bolt 96.

  The auxiliary cover 101 is configured to be detachable from the connection plate 92 with the main body 100 closed. Specifically, in a plan view, where a gap S1 is formed between the closed main body 100 and the auxiliary cover 101 (first bent portion 101b), the bolt 102 is located in the gap S1. I have.

  According to such a configuration, when attaching and detaching the auxiliary cover 101, the bolt 102 is operated from the gap S1 between the main body 100 and the auxiliary cover 101 (the first bent portion 101b) without opening the main body 100. In addition, the work of attaching and detaching the auxiliary cover 101 can be easily performed.

  Then, by removing the auxiliary cover 101, the connection plate 92 is exposed. Specifically, by removing the auxiliary cover 101, the three bolts 94 are exposed. Thereby, the connection plate 92 can be removed by operating the three bolts 94 and the three bolts 96. As described above, when the connection by the connection plate 92 is released, there is no need to open the main body 100, and only the auxiliary cover 101 needs to be removed, so that the connection release operation can be easily performed.

(Positioning mechanism)
As shown in FIGS. 12 to 15, a positioning mechanism 103 for positioning the straw frame 61 in the front-rear position with the straw frame 61 at the lowered position is provided. The positioning mechanism 103 is configured to extend over the straw frame 61 and the first rear upper frame 52. The positioning mechanism 103 includes a positioning plate 104 and an inserted member 105 into which the positioning plate 104 is inserted. The positioning plate 104 is bolted to a stay 106 fixed to the free end frame 86 of the straw frame 61. The inserted member 105 is fixed to the main pipe 54 of the first rear upper frame 52. The positioning plate 104 and the insertion target member 105 are moved from the lower end of the upper portion of the first rear upper frame 52 in a state where the positioning plate 104 is inserted into the insertion target member 105 (a state in which the straw frame 61 is located at the lowered position). Does not protrude below.

  According to such a configuration, the positioning plate 104 is inserted into the insertion target member 105 from above as the straw frame 61 swings downward. In this manner, when the positioning plate 104 is inserted into the insertion target member 105 and the straw frame 61 is at the lowered position, the straw frame 61 does not shift in the front-rear direction. Will be positioned.

[Lock mechanism for straw frame]
As shown in FIGS. 11 to 16, a lock mechanism 107 is provided for holding the basal end portion of the straw frame 61 in the upper frame 37 on the right side in a state where the straw frame 61 is at the lowered position. . The lock mechanism 107 includes a pin 108 provided on the upper frame 37 on the right side, and a hook 109 provided on the straw frame 61 and engageable with the pin 108. The pin 108 is supported on the right upper frame 37 via a stay 110. The hook 109 is supported by the base frame 83 via a stay 111.

  As shown in FIG. 13, the hook 109 is engaged with the pin 108 as the straw frame 61 is swung downward. In this manner, the hook 109 is engaged with the pin 108, so that the lock mechanism 107 holds the basal end portion of the straw discharging frame 61 at the right upper frame 37.

  Then, as shown in FIG. 14, the hook 109 comes off the pin 108 as the straw frame 61 is swung upward. In this manner, when the hook 109 is detached from the pin 108, the lock mechanism 107 releases the position of the basal end portion of the straw discharging frame 61 on the right upper frame 37.

[Lock mechanism for handle cylinder frame]
As shown in FIG. 11 to FIG. 15, FIG. 19 and FIG. 20, a lock mechanism 112 for holding the left upper frame 36 at the first rear upper frame 52 in a state where the handle cylinder frame 38 is located at the lowered position is provided. Have been. The lock mechanism 112 includes a roller 113 provided on the first rear upper frame 52 and a hook 114 provided on the left upper frame 36 and capable of engaging with the roller 113.

  The roller 113 is supported by a stay 115 fixed to the main pipe 54 so as to be rotatable around a longitudinal axis. The roller 113 does not protrude below the lower end of the upper portion of the first rear upper frame 52.

  The hook 114 is supported by the support shaft 116 so as to be swingable around a longitudinal axis (swing axis) Y6. The hook 114 is provided with a roller portion 114a rotatable around the pivot axis Y6 and a hook portion 114b fixed to an outer peripheral portion of the roller portion 114a so as to rotate integrally with the roller portion 114a. . The support shaft 116 is provided so as to protrude rearward from the rear end of the upper frame 36 on the left side. The rear end of the support shaft 116 is supported by a stay 155.

  An interlocking mechanism 117 is provided for interlocking the lock mechanism 112 (the hook 114) with the rear handle cylinder locking mechanism 41 (the rear plate 42). The interlocking mechanism 117 includes a rod 118 extending in the front-rear direction, a front connection arm 119 interlockingly connecting the rear plate 42 and the rod 118, and a rear connection arm 120 interlockingly connecting the rod 118 and the hook 114. Provided. The rod 118 is supported by a left upper frame 36 via a stay or the like so as to be rotatable around its axis (front-back direction axis). The rear end of the rod 118 is supported by a stay 155. A front stay 121 is provided at the front end of the rod 118. A front connection arm 119 is provided between the front stay 121 and the rear plate 42. A rear stay 122 is provided at the rear end of the rod 118. A rear connecting arm 120 is provided over the rear stay 122 and the hook portion 114b.

  As shown in FIGS. 13 and 19, when the rear plate 42 swings toward the engagement side around the swing axis Y3 such that the rear hook portion 42a engages with the rear roller 43, The swing of the rear plate 42 toward the engagement side is transmitted to the hook 114 by the interlocking mechanism 117, and the hook 114 is engaged with the roller 113. By engaging the hook 114 with the roller 113, the left upper frame 36 is held at the first rear upper frame 52 by the lock mechanism 112 with the handle cylinder frame 38 at the lower position. Become.

  In this manner, the left upper frame 36 is connected to the first rear upper frame 52 via the lock mechanism 112 when the straw frame 61 is located at the lowered position. That is, in a state where the straw frame 61 is located at the lowered position, the first rear upper frame 52 is connected to the right upper frame 37 via the left upper frame 36 and the straw frame 61.

  As shown in FIGS. 14 and 20, when the rear plate 42 swings toward the disengagement side around the swing axis Y3 such that the rear hook portion 42a is disengaged from the rear roller 43. The swing of the side plate 42 toward the disengagement side is transmitted to the hook 114 by the interlocking mechanism 117, and the hook 114 comes off the roller 113. In this manner, when the hook 114 comes off the roller 113, the position holding of the left upper frame 36 on the first rear upper frame 52 by the lock mechanism 112 is released.

[Swinging structure of waste cutting device]
As shown in FIG. 22, the straw cutting device 14 is supported by a support 124 erected on the body frame 1 via a pair of upper and lower support shafts 123 so as to be able to swing around the swing axis Z1. Have been. The support 124 is provided with an upper frame 125 that supports the upper support 123 and a lower frame 125 that supports the lower support 123 so as to protrude rearward from the support 124, respectively. I have. A frame 126 is provided on the right side of the straw cutting device 14 so as to extend in the vertical direction. A plate 127 is fixed to an upper portion of the frame 126 so as to swing integrally with the frame 126 around the swing axis Z1. The plate 127 is rotatably supported by the upper support shaft 123. A lower stay 128 is provided at a lower portion on the right side of the waste straw cutting device 14. The lower stay 128 is rotatably supported by the lower support shaft 123. An angle sensor 129 for detecting a swing angle of the straw cutting device 14 around the swing axis Z1 is provided. The angle sensor 129 is configured by a potentiometer.

[Lock mechanism for waste straw cutting device]
As shown in FIGS. 22 to 25, the swing of the straw cutting device 14 from the working position to the non-working position and the swing of the straw cutting device 14 from the non-working position to the working position are regulated. A lock mechanism 130 is provided. The lock mechanism 130 is configured to be switchable between a non-regulated state in which the swing of the straw cutting device 14 is not regulated and a regulated state in which the swing of the straw cutting device 14 is regulated. The lock mechanism 130 includes a plate 127 and a cam 131.

  The cam 131 is supported by a support shaft 132 so as to be able to swing around a left-right axis (swing axis) X1. The support shaft 132 is provided on the upper frame 125 so as to protrude leftward from the upper frame 125. The cam 131 is retained by a bolt 133 and a flat washer 134 in a state of being fitted around the support shaft 132.

  A torsion spring 135 that urges the cam 131 to swing toward the initial position is provided. A stopper 136 is provided that comes into contact with the cam 131 in a state where the cam 131 is located at the initial position. One end of the torsion spring 135 is engaged with the cam 131 and the other end of the torsion spring 135 is engaged with the stopper 136 in a state of being fitted around the support shaft 132. The cam 131 is oscillated to the initial position by the torsion spring 135 and comes into contact with the stopper 136, whereby the cam 131 is held at the initial position.

  As shown in FIGS. 16, 19 to 21, the lock mechanism 130 is locked to the raising operation of the straw frame 61 so that the lock mechanism 130 regulates the swing of the straw cutting device 14 in conjunction with the raising of the straw frame 61. An interlocking mechanism 137 for interlocking the regulating operation of the mechanism 130 is provided. The interlocking mechanism 137 has an arm 138 that can swing around the swing axis Y2 separately from the straw frame 61, and an action pin 139 that swings integrally with the straw frame 61 and presses the arm 138 (action ), And a cable wire 140 (coupling member) that links the arm 138 and the lock mechanism 130.

  The arm 138 is supported by a rear end of the support shaft 87 via a bush 141 so as to be able to swing around the swing axis Y2 separately from the straw frame 61. The arm 138 includes an actuated portion 138a on which the action pin 139 pushes and a connecting portion 138b to which the cable wire 140 is connected. The action pin 139 is provided at the rear end of the stay 89 so as to protrude rearward from the rear end of the stay 89.

  The cable wire 140 is provided over the arm 138 and the cam 131. The cable wire 140 includes an inner wire 140a and an outer wire 140b. The end on the arm 138 side of the inner wire 140a is connected to the connecting portion 138b. An end of the outer wire 140b on the arm 138 side is supported by a stay 142. The stay 142 is bolted to the rear stay 88. A positioning pin 143 (positioning member) for positioning the arm 138 at the initial position is provided. The positioning pins 143 are supported by stays 142.

  As shown in FIG. 23, the end of the inner wire 140a on the cam 131 side is connected to the cam 131. The connecting shaft 131a to which the inner wire 140a is connected is provided on the cam 131 so as to protrude leftward from the cam 131. An end of the outer wire 140b on the cam 131 side is supported by a stay 144. The stay 144 is fixed to the upper frame 125.

  As shown in FIG. 19 and FIG. 20, when the straw frame 61 is located in the range from the lower position to the second upper position, the cam 131 is held at the initial position. In this state, as shown in FIG. 25, the cam 131 is located below the lower surface of the plate 127 in the rotation locus of the tip 127a of the plate 127. Therefore, even if the plate 127 rotates around the swing axis Z1, it does not come into contact with the cam 131, and the swing of the straw cutting device 14 is not restricted. In this manner, as shown in FIGS. 27 to 29, in a state where the straw frame 61 is located in the range from the lower position to the second upward position, the lock mechanism 130 is in the non-restricted state. The straw cutting device 14 can be switched between a working position and a non-working position.

  Here, as shown in FIGS. 19 and 20, when the straw frame 61 rises from the lowered position, the action pin 139 swings upward integrally with the straw frame 61. However, the action pin 139 does not push the arm 138 (operated part 138a) if the raised position of the straw frame 61 is lower than the reference position (second raised position). Therefore, the arm 138 does not pull the cable wire 140 in a state where the straw frame 61 is located in the range from the lowering position to the second raising position.

  Then, as shown in FIG. 21, when the straw frame 61 is raised from the second raised position to the first raised position, the operating pin 139 pushes the arm 138 (the affected part 138a), and the arm 138 is moved by the cable wire. 140 will be pulled. That is, when the rising position of the straw frame 61 exceeds the reference position (second rising position), the action pin 139 pushes the arm 138. As a result, the cam 131 swings upward to the position shown in FIG. 21 in a form pulled by the cable wire 140 against the urging force of the torsion spring 135.

  In this state, as shown in FIG. 26, the cam 131 has entered above the lower surface of the plate 127 in the rotation locus of the tip 127a of the plate 127. Therefore, when the plate 127 rotates around the pivot axis Z1, the plate 127 comes into contact with the cam 131, so that the pivot of the straw cutting device 14 is restricted. In this way, the action pin 139 pushes the arm 138 (the affected part 138 a), and the arm 138 pulls the cable wire 140. Will be regulated. In this manner, as shown in FIGS. 27 and 30, when the straw frame 61 is located at the first raised position, the lock mechanism 130 is in the restricted state. Cannot switch to non-working position.

  As shown in FIG. 31, when the lock mechanism 130 is switched to the restricted state in a state where the waste cutting device 14 is located at the working position, the waste cutting device 14 can be switched from the working position to the non-working position. Can not.

  More specifically, as shown in FIG. 32, when the straw cutting device 14 is swung from the working position to the non-working position while the lock mechanism 130 is in the regulated state, the plate 127 is moved from the working position to the first locked position. At the stage of swinging by one allowable angle θ1, the first contact surface 127b of the plate 127 comes into contact with the cam 131. Thus, the first contact surface 127b of the plate 127 abuts on the cam 131, so that the straw cutting device 14 is prevented from further swinging to the non-working position side.

  As shown in FIG. 33, when the lock mechanism 130 is switched to the restricted state in a state where the straw cutting device 14 is located at the non-working position, the straw cutting device 14 is switched from the non-working position to the working position. Can not.

  More specifically, as shown in FIG. 34, when the straw cutting device 14 is swung from the non-work position to the work position while the lock mechanism 130 is in the restricted state, the plate 127 is moved from the non-work position to the second lock position. At the stage of swinging the second allowable angle θ2, the second contact surface 127c of the plate 127 comes into contact with the cam 131. In this way, the second contact surface 127c of the plate 127 abuts on the cam 131, so that the straw cutting device 14 is prevented from further swinging to the work position side.

  In this manner, as shown in FIG. 35, the lock mechanism 130 prevents the straw cutting device 14 from swinging from the working position to the non-working position by a certain angle range (first allowable angle θ1) in the restricted state. In addition, it permits the straw cutting device 14 to swing from the non-working position to the working position by a certain angle range (second allowable angle θ2). The second allowable angle θ2 is set to an angle larger than the first allowable angle θ1.

[Waste cover]
As shown in FIGS. 3, 36, and 37, a straw receiving cover 145 that receives the straw is provided below the straw transporting device 13. The straw receiving cover 145 is provided over the threshing device 9 and the straw cutting device 14. The straw receiving cover 145 includes a first cover 146 that forms a front portion of the straw receiving cover 145, and a second cover 147 that forms a rear portion of the straw receiving cover 145.

  The first cover 146 is supported by the threshing device 9 (specifically, the dust discharge fan 23). The first cover 146 includes a front cover portion 148, a left rear cover portion 149, and a right rear cover portion 150. A gap S2 into which the rear support member 70 enters is provided between the left rear cover portion 149 and the right rear cover portion 150 so as not to interfere with the rear support member 70. The second cover 147 is supported by the straw cutting device 14. The second cover 147 is located at a lower position than the first cover 146.

  In the straw receiving cover 145, the division D between the first cover 146 and the second cover 147 is located at a height lower than the vertex T. The division D between the first cover 146 and the second cover 147 is provided so that the transport end of the straw transporting device 13 located at the second rising position does not come into contact with the straw transporting device 13 located at the second rising position. Is located at a height position lower than the height position of the lower end of the transfer end portion.

(Switch plate)
As shown in FIG. 12, FIG. 38 and FIG. 39, when the switching plate 17 is opened and closed with the straw frame 61 raised, the switching plate 17 A cutout 17a into which the transport end of the straw cutting device 14 is inserted is formed so that the opening and closing of the switching plate 17 is not hindered by contact with the cutting device. The switching plate 17 is provided with a cover 151 that covers the notch 17a in a state that allows the transport end of the straw transporting device 13 to enter the notch 17a. A mounting member 152 to which the cover 151 is mounted is fixed to the switching plate 17 by bolts 153. The outer peripheral edge of the cover 151 is fixed to the inner peripheral edge 152a of the mounting member 152 by bolts 154. Reinforcing ribs 152b are formed on the mounting member 152.

  The cover 151 is made of an elastically deformable member. In the present embodiment, the cover 151 is made of, for example, a rubber-like elastic body (polyurethane elastomer). In the cover 151, a slit 151a is formed which extends in the short direction of the switching plate 17 (the direction orthogonal to the pivot axis of the switching plate 17). The inner peripheral edge 152a of the attachment member 152 has a shape that is inclined downward at the tip so that both edges along the slit 151a of the cover 151 are lower toward the slit 151a when the cover 151 is attached to the attachment member 152. (See FIG. 39). Thus, when the switching plate 17 is closed, the straw that slides on the upper surface of the switching plate 17 is less likely to be caught by the slit 151a.

  Here, as the straw frame 61 is swung upward, the height position of the transport end portion of the straw transport device 13 decreases. In this embodiment, when the switching plate 17 is opened and closed with the straw frame 61 raised, the transport end of the straw transport device 13 enters the notch 17a via the slit 151a. At this time, when the transport terminal of the straw transport device 13 comes into contact with the cover 151, the cover 151 is elastically deformed and the cut-out portion 17a of the transport terminal of the straw transport device 13 is allowed to enter. . Thereafter, when the transport end portion of the straw transport device 13 is separated from the cover 151, the cover 151 returns to its original shape.

[Another embodiment]
(1) In the above embodiment, the first rear upper frame 52 is connected to the right upper frame 37 via the second rear upper frame 60 and the horizontal frame 57. However, the first rear upper frame 52 may be connected to the right upper frame 37 via the second rear upper frame 60 without passing through the horizontal frame 57. That is, the right end of the second rear upper frame 60 may be connected (for example, bolted) to the rear end of the right upper frame 37.
.

(2) In the above embodiment, the first rear upper frame 52 is configured by a plurality of tubular members (three pipes in the above embodiment) arranged in the left-right direction. However, the first rear upper frame 52 may be constituted by a plurality of tubular members arranged vertically. Further, the number of tubular members is not limited to three.

(3) In the above embodiment, a gap S1 is formed between the main body 100 in a closed state and the auxiliary cover 101 in a plan view, and the bolt 102 for detachably fixing the auxiliary cover 101 to the connection plate 92 is formed by a gap. It is located in S1. However, the configuration in which the auxiliary cover 101 can be attached to and detached from the connection plate 92 with the main body 100 closed is not limited to the configuration according to the above embodiment. For example, the bolt 102 can be operated with the main body 100 closed so that a portion of the main body 100 corresponding to the bolt 102 (a portion overlapping with the bolt 102 in a plan view) is covered by the main body 100 from above. In this way, a hole for inserting a bolt operating tool may be formed.

(4) In the above embodiment, the linking member is configured by the cable wire 140, but the linking member may be configured by, for example, a rod or an arm.

  INDUSTRIAL APPLICABILITY The present invention is applicable to a combine (for example, a self-contained combine).

Reference Signs List 9 threshing device 10 feed chain 12 handling cylinder 13 straw conveying device 14 straw cutting device 61 straw frame 130 lock mechanism 137 interlocking mechanism 138 arm 139 action pin (action member)
140 cable wire (coupling member)
142 Stay 143 Positioning pin (positioning member)
Y2 Vertical axis Z1 Vertical axis

Claims (4)

A feed chain for pinching and transporting the harvested grain culm;
A threshing device for threshing a harvested grain culm conveyed by the feed chain having a handling cylinder,
A straw transport device that is connected to the rear of the threshing device and receives the straw after threshing from the feed chain and pinches and transports the straw backward,
A straw frame that supports the straw conveying device and can swing up and down around a longitudinal axis,
A straw cutting device that is provided below the straw transport device and performs a cutting process on the straw transported by the straw transport device,
The straw cutting device swings around a vertical axis center between a working position for receiving the straw from the straw conveying device and performing a cutting process, and a non-working position located away from the working position. A combine configured to be movable,
A rocking mechanism that regulates the swing of the straw cutting device from the working position to the non-working position and the swing of the straw cutting device from the non-working position to the working position.
An interlocking mechanism that interlocks the regulating operation of the lock mechanism with the raising operation of the straw frame,
The interlocking mechanism is an arm that is swingable separately from the straw frame around the longitudinal axis, an operating member that moves integrally with the straw frame and pushes the arm, and the arm and the arm A linking member that links the lock mechanism; and
As the action member pushes the arm and the arm pulls the link member, the lock mechanism regulates the swing of the straw cutting device in conjunction with the rise of the straw frame. Combines that are composed.   The operating member does not push the arm when the rising position of the straw frame is equal to or lower than the reference position, and pushes the arm when the rising position of the straw frame exceeds the reference position. Item 3. The combine according to item 1.   The combine according to claim 1, further comprising a positioning member that positions the arm at an initial position. A stay for supporting an end of the linking member on the arm side is provided,
The combine according to claim 3, wherein the positioning member is supported by the stay.

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