JP2020014484A - Combine - Google Patents

Abstract

To provide a combine capable of opening easily an upper cover and a waste straw transport device.SOLUTION: A combine includes an upper frame 40 supporting a threshing cylinder, and vertically swingable around a swing shaft center Y2 extending in a machine body cross direction, and a waste straw frame 50 supporting a waste straw transport device, and vertically swingable around the swing shaft center Y2 over a lowered position where the waste straw transport device transfers waste straw and an elevated position where the waste straw transport device does not transfer waste straw.SELECTED DRAWING: Figure 9

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 carried by the feed chain by a handling cylinder, and a feed chain connected to the rear side of the threshing device, from the feed chain. A straw conveying device for receiving the straw after the threshing process and nipping and conveying the straw backward.

  For example, a combine described in Patent Literature 1 is already known as the above combine. The combine described in Patent Literature 1 includes a feed chain that pinches and transports the harvested grain culm (“threshing feed chain” in the literature), and a cylinder that handles the harvested grain culm transported by the feed chain (in the literature, “handler cylinder”). A threshing device (in the literature, "threshing machine") for threshing by a threshing device, and a straw transport device that is connected to the rear side of the threshing device and receives the straw after the threshing process from a feed chain and pinches and conveys the straw backward ( In the literature, a “straw conveying device”) is provided. Above the handling cylinder, an upper cover ("a handling cylinder cover" in the literature) that covers the handling cylinder from above is provided. The upper cover is configured to swing open and close with one side of the handling room as a fulcrum. The straw discharge device is configured to swing up and down about a pivot axis in the front-rear direction. According to such a configuration, the upper cover and the straw conveying device are opened by swinging the upper cover and the straw conveying device upward, respectively, so that maintenance work can be easily performed.

JP 2012-50339 A

  In the combine described in Patent Literature 1, the upper cover and the straw conveying device must be opened separately, and the opening must be manually performed, which is troublesome.

  In view of the above situation, there is a need for a combine that can easily open the upper cover and the straw conveying device.

The features of the present invention are:
A feed chain for pinching and transporting the harvested grain culm;
A threshing device that thresh-processes the harvested grain culm conveyed by the feed chain by a handling cylinder,
A combine provided with a straw transporting device that is connected to the rear side of the threshing device and receives the straw after the threshing process from the feed chain and pinches and transports the straw backward.
An upper cover that covers the handling cylinder from above,
While supporting the upper cover, an upper frame that can swing up and down around a swing axis extending in the longitudinal direction of the aircraft,
An actuator for swinging the upper frame upward,
The swing shaft center supports the straw conveying device, and extends between a lower position where the straw conveying device conveys the straw and an ascending position where the straw conveying device does not convey the straw. A straw frame that can swing up and down around,
A connection mechanism for removably connecting the upper frame and the straw frame, and
In a connection state in which the upper frame and the straw frame are connected by the connection mechanism, the upper frame and the straw frame can swing upward by the actuator,
In the disconnected state in which the connected state is released, only the upper frame of the upper frame and the straw frame can swing upward by the actuator.

  According to this characteristic configuration, in the connected state, by swinging the upper frame and the straw frame upward by the actuator, the upper frame and the straw frame swing upward integrally, so that the upper cover and The straw discharge device can be easily opened. Further, in the disconnected state, only the upper frame of the upper frame and the straw frame is swung upward by the actuator, so that it is not necessary to open the upper cover when performing maintenance work on the straw transport device. In this case, only the straw conveying device can be opened.

Further, in the present invention,
The upper frame is provided with a front-rear frame that is located on the outer side of the fuselage in the lateral direction of the fuselage and extends in the longitudinal direction of the fuselage.
The front-rearward frame is extended to a rear side from a rear end of the handling cylinder,
It is preferable that the connection mechanism is capable of connecting the front-rearward frame and an end of the straw frame on the outside of the body in the body left-right direction.

  According to this characteristic configuration, the front-rearward frame located on the outside of the body in the left-right direction of the upper frame, and the end of the outside of the body in the left-right direction of the straw frame are connected by the connection mechanism. Become. Thereby, the portions of the upper frame and the straw frame that are connected to each other are close to each other, so that the connecting mechanism can have a compact structure with a short connecting distance. In addition, when performing a connection operation or a connection release operation, it is easy to access the connection mechanism from outside the body.

Further, in the present invention,
The straw frame, a horizontal frame extending from the swing axis side to the outside of the fuselage in the lateral direction of the fuselage, and connected to an end of the lateral frame outside the fuselage in the lateral direction of the fuselage and in the longitudinal direction of the fuselage. An outer frame that extends,
The outer frame extends along the front-rear frame at the lowered position, and is adjacent to the front-rear frame.
It is preferable that the connection mechanism is capable of connecting the front-rear frame and the outer frame.

  According to this characteristic configuration, the outer frame that is close to the front-rear frame among the straw frames is connected to the front-rear frame by the connection mechanism. Thereby, the portions of the upper frame and the straw frame that are connected to each other are closer to each other, so that the connection mechanism can be further reduced in size.

Further, in the present invention,
It is preferable that the connecting mechanism extends over an upper part of the front-rear frame and an upper part of the straw frame.

  Normally, the straw conveying device will be supported by the straw frame in a state where it is located below the straw frame. Here, if the connecting mechanism extends over the lower part of the front-back frame and the lower part of the straw frame, the connecting mechanism should be located below the straw frame (that is, on the straw conveying device side). Therefore, there is a concern that the connecting mechanism hinders the conveyance of the straw by the straw conveying device.

  However, according to this characteristic configuration, since the connecting mechanism is located above the straw frame (that is, the side opposite to the straw transport device), the connecting mechanism is configured to remove the straw by the straw transport device. It becomes difficult to hinder transport. In addition, the connection operation and the connection release operation can be more easily performed by accessing the connection mechanism from above, which has a relatively large space on the opposite side to the straw conveying device.

Further, in the present invention,
It is preferable that the connection mechanism is capable of releasing connection to each of the front-rearward frame and the straw frame.

  According to this characteristic configuration, a member that swings upward among the upper frame and the straw frame can be selected by releasing the connection of the connecting mechanism to the front-rear frame and the straw frame, respectively. That is, it is possible to swing only the upper frame of the upper frame and the straw frame upward, or swing only the straw frame of the upper frame and the straw frame upward.

Further, in the present invention,
A rear frame provided on the upper rear of the aircraft is provided,
It is preferable that the front-rear frame and the rear frame are connected so as to be uncoupled.

  According to this characteristic configuration, the upper frame, the straw frame, and the rear frame are integrated by connecting the front-rear frame and the waste frame by the connection mechanism, and by connecting the front frame and the rear frame. Thus, a structure having high rigidity can be formed. In addition, since the connection between the front-rear frame and the rear frame is released, the upward swing of the upper frame is not hindered.

Further, in the present invention,
The rear frame includes a portion adjacent to the front-rear frame while being connected to the front-rear frame,
It is preferable that, in a state where the front-rear frame and the rear frame are connected, a portion of the straw frame outside the fuselage in the horizontal direction of the fuselage is in contact with the rear frame in the vertical direction.

  According to this characteristic configuration, in a state where the front-rearward frame and the rear frame are connected by the connecting mechanism, the front-rear frame and the rear frame are connected to connect the rear frame to the rear frame in the vertical direction. Become. Thus, the straw frame is sandwiched between the rear frame and the connection mechanism, and the connection structure can be firmly configured.

Further, in the present invention,
The handling cylinder is supported by the upper frame,
It is preferable that the handling cylinder is swingable upward by the actuator together with the upper frame.

  According to this characteristic configuration, maintenance work of the handling cylinder can be easily performed.

It is a left view which shows a self-removing combine. It is a top view which shows a self-removing type 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 upper frame was lowered. It is a rear view which shows the threshing apparatus in the state which raised the upper frame. It is a top view which shows the rear part of the threshing apparatus, and the straw conveyance apparatus. It is a left view which shows the rear part of the threshing apparatus in the state where the upper frame and the straw frame were lowered, and the straw conveying apparatus. It is a rear view showing the structure behind the threshing device in the state where the upper frame and the straw frame were lowered. It is a rear view which shows the structure behind the threshing apparatus in the state which raised the upper frame and the straw frame. It is a rear view showing the straw conveyance device in the state where the upper frame and the straw frame were lowered. It is a rear view which shows the straw conveyance apparatus in the state which raised the upper frame and the straw frame. It is a disassembled perspective view which shows the structure of the base end side of a straw frame. It is a left view which shows the structure of the base end side of a straw frame. It is an exploded perspective view showing an upper frame, a straw frame, and a rear frame. It is a rear sectional view showing a connection mechanism. It is a rear sectional view showing an inside lock mechanism of an engagement state. It is a rear sectional view showing an inside lock mechanism of an engagement release state. FIG. 4 is a rear cross-sectional view showing the outer lock mechanism in an engaged state. It is a rear sectional view showing the outside lock mechanism in the disengaged state. FIG. 5 is a diagram illustrating a lifting operation unit. It is a left view which shows the rear part of the threshing apparatus in the state which raised the upper frame and the straw frame, and the straw conveying apparatus. It is a left view which shows the rear part of the threshing apparatus, and the straw conveying apparatus in the state where the upper frame was raised and the straw frame was lowered. It is a left side sectional view showing a rear upper cover. It is a perspective view which shows a rear upper cover. It is a figure which shows the ascending limit height and swing angle of each of an upper frame and a straw frame. It is a figure showing the raising and lowering mechanism of the upper frame and the straw frame concerning the other first example. In the first other example, it is a figure showing a state where the upper frame and the straw frame have risen to the same ascending limit height. In the first other example, it is a figure showing a state where the upper frame and the straw frame have risen to different ascent heights. It is a figure which shows the raising / lowering mechanism of the upper frame and straw frame which concern on a 2nd other example. In the second other example, it is a figure showing a state where the upper frame and the straw frame have risen to the same ascending limit height. In the second other example, it is a figure showing a state where the upper frame and the straw frame have risen to different ascending limit heights. It is an outside lock mechanism concerning another embodiment, and is a back sectional view showing an engagement state. It is an outside lock mechanism concerning another embodiment, and is a back sectional view showing an engagement release state. It is a perspective view showing the straw frame concerning another embodiment.

[Overall structure of combine]
FIG. 1 and FIG. 2 show a self-contained combine. The combine includes a body frame 1 and a traveling device 2 that supports the body frame 1. An operating cabin 3 is provided on the right side at the front of the fuselage. The driving cabin 3 includes a driving unit 4 on which a driver rides, and a cabin 5 that covers the driving unit 4. An engine (not shown) is provided below the operation unit 4.

  In front of the driving cabin 3, a harvesting unit 6 for harvesting crops in the field is provided. A grain storage tank 7 for storing grains is provided behind the operation cabin 3. A grain discharging device 8 for discharging the grains in the grain storage tank 7 is provided. A feed chain 9 for nipping and transporting the harvested grain culm is provided on the left side of the body. A threshing device 10 is provided on the left side of the grain storage tank 7. The threshing apparatus 10 performs threshing processing on the harvested grain culm conveyed by the feed chain 9 by the handling cylinder 11. On the rear side of the threshing device 10, a straw conveying device 12 is provided continuously. The waste straw conveying device 12 receives the straw after the threshing process from the feed chain 9 and pinches and conveys the straw backward.

(Harvesting department)
The harvesting unit 6 is configured to have a plurality of cut specifications (for example, a six-row cut specification). The harvesting unit 6 includes a plurality (for example, seven) of weeding tools 13, a plurality (for example, six) of raising devices 14, a cutting device 15, and a transport device 16. The weeding implement 13 weeds the crops in the field. Trigger 14 raises the weeds. The cutting device 15 cuts the crop that has been caused. The transport device 16 transports the harvested crop backward toward the threshing device 10.

[Threshing equipment, etc.]
As shown in FIG. 3, a handling room 17 is formed in an upper part of the threshing device 10. The handling room 17 is provided with a handling cylinder 11. The handling cylinder 11 is rotatable around a rotation axis Y1 extending in the longitudinal direction of the body. A receiving net 18 is provided below the handling cylinder 11. A dust discharge fan 19 for discharging dust to the outside is provided behind the handling chamber 17.

  In the lower part of the threshing device 10, a rocking sorting device 20 for sieving and sorting while transferring the sorting target to the rear of the machine, a Karamin 21 for sending a sorting wind to the rocking sorting device 20, a first grain (single grain) A first recovery unit 22 for recovering fossilized grains and the like, a second recovery unit 23 for recovering second grains (such as grains with branch stems), and the like are provided.

  The first collecting section 22 is provided with a first screw 24 that conveys the first grain to the right. At the right end of the first screw 24, a frying device 25 for frying and transporting the first grain to the grain storage tank 7 is interlockingly connected.

  The second collection unit 23 is provided with a second screw 26 that conveys the second grain to the right. At the right end of the second screw 26, a second reduction device 27 that reduces the second grain to the rocking sorting device 20 is interlockingly connected.

  A straw cutting device 28 that cuts the straw transported by the straw transport device 12 is provided below the rear portion of the straw transport device 12. A cover 29 that covers the straw cutting device 28 is provided. A switching plate 29a is provided on a portion of the cover 29 located above the straw cutting device 28. The switching plate 29a is swingably openable and closable around a swing axis extending in the lateral direction of the machine body between a cutting position on the ascending side and a non-cutting position on the descending side. With the switching plate 29a open (state of the cutting position), the straw conveyed by the straw conveying device 12 is put into the straw cutting device 28. With the switching plate 29a closed (in a non-cutting position), the straw transported by the straw transporting device 12 slides on the upper surface of the switching plate 29a and falls to the ground.

  As shown in FIGS. 3 to 7, a wall portion 30 is provided at each of a front end portion and a rear end portion of the handling room 17. The front wall 30 constitutes a front wall of the handling room 17. The rear wall 30 constitutes a rear wall of the handling room 17. The wall 30 includes a movable wall 31 and a fixed wall 32. The handling cylinder 11 is rotatably supported by the movable wall 31 via a handling cylinder shaft 11a. A connection arm 33 that connects the movable wall 31 and the fixed wall 32 is provided. The movable wall 31 is supported by a fixed wall 32 via a connecting arm 33 so as to be vertically swingable about a swing axis Y2 extending in the longitudinal direction of the machine body. A transmission shaft 34 for transmitting the power of the engine is provided between the front fixed wall 32 and the rear fixed wall 32.

  The right side of the threshing apparatus 10 is constituted by a right side wall 35. The right side wall 35 extends to the rear end of the fuselage. The right side wall 35 has an inclined portion 35a. The inclined portion 35a is inclined rearward of the rear wall portion 30 so that the rear side is closer to the left and right center of the fuselage.

  On both left and right sides of the threshing device 10, longitudinal frames 36L and 36R extending in the longitudinal direction of the machine are provided, respectively. The front-rear frame 36L on the left side extends to the rear side from the rear end of the handling cylinder 11. The front-rear frame 36L on the left side is formed of a square pipe having a substantially square cross section. The right-side front-facing frame 36R extends to the rear side from the rear end of the handling cylinder 11. The right front-rear frame 36R supports the front fixed wall 32, the rear fixed wall 32, and the right wall 35. The right front-rear frame 36R is formed of a square pipe having a substantially rectangular cross section (horizontally long rectangular shape).

[Rear frame]
A rear frame 37 is provided at an upper rear portion of the fuselage. The rear frame 37 is located on the outside of the threshing apparatus 10 in the lateral direction of the machine. The rear frame 37 is formed in a substantially U-shape that projects rearward from the rear of the threshing device 10 in a side view. The rear frame 37 is configured by a round pipe.

[Top cover]
An upper cover 38 that covers the handling cylinder 11 from above is provided. The upper cover 38 extends beyond the rear end of the handling cylinder 11 to above the rear of the straw transporting device 12. On the right of the upper cover 38, an upper right cover 39 is provided. The upper right cover 39 extends beyond the rear end of the straw transporting device 12 behind the rear end of the handling cylinder 11. The upper right cover 39 is supported by the right front-rear frame 36R so as to be able to swing up and down around a swing axis extending in the body longitudinal direction.

[Upper frame]
The upper cover 38 is supported by the upper frame 40. The upper frame 40 can swing up and down around a transmission shaft 34 extending in the longitudinal direction of the fuselage. The upper frame 40 is supported by the front wall portion 30 and the rear wall portion 30 via the transmission shaft 34 so as to be able to swing up and down around the swing axis Y2. The upper frame 40 includes a pair of front and rear movable walls 31 and a left and right front-facing frame 36L. The left front-facing frame 36L is located on the outer side of the upper frame 40 in the left-right direction of the body.

  A hydraulic cylinder 41 that swings the upper frame 40 upward is provided. The hydraulic cylinder 41 is provided across the rear movable wall 31 and the rear fixed wall 32. The hydraulic cylinder 41 is configured by, for example, a double-acting hydraulic cylinder. However, the hydraulic cylinder 41 may be constituted by a single-acting hydraulic cylinder.

[Hand cylinder lock mechanism]
The handling cylinder 11 can be swung upward by the hydraulic cylinder 41 together with the upper frame 40. A handling cylinder lock mechanism 42 that holds the handling cylinder 11 at a threshing position for performing threshing is provided. The handle cylinder lock mechanism 42 includes a pair of front and rear hook plates 43 and a pair of front and rear handle cylinder hook pins 44. A hook plate 43 is supported on each of the front wall portion 30 and the rear wall portion 30 so as to be swingable around a swing axis Y3 in the longitudinal direction of the vehicle. A hook portion 43 a that can be engaged with the handle cylinder hook pin 44 is provided at the tip of the hook plate 43. By engaging the hook portion 43a with the handle cylinder hook pin 44, the handle cylinder 11 is held at the threshing position. When the engagement of the hook portion 43 a with the handle cylinder hook pin 44 is released, the handle cylinder 11 is swung upward by the hydraulic cylinder 41 together with the upper frame 40. A motor M that swings the pair of front and rear hook plates 43 is supported on the rear surface of the rear wall 30. The motor M swings the pair of front and rear hook plates 43 toward the engagement side and the engagement release side.

[Straw conveying device]
As shown in FIG. 6 and FIG. 7, the straw discharge device 12 is provided in an inclined state such that it is located closer to the center of the right and left sides of the fuselage toward the rear. The waste straw transporting device 12 includes a stock transport device 45 for nipping and transporting the stock root side of the straw, and a head transport device 46 for locking and transporting the tip side of the straw. The stock transfer device 45 includes a straw chain 47 with a protrusion 47a and a straw rail 48. The straw rail 48 is arranged below the straw chain 47 so as to face the lower path of the straw chain 47. The tip conveying device 46 includes a straw tip chain 49 with a tine 49a.

  The straw conveying device 12 is supported by a straw frame 50. The straw conveying device 12 is detachable from the straw frame 50. The straw conveying device 12 is suspended from and supported by a straw frame 50 via a front stay 51 and a rear stay 52. The straw conveying device 12 is detachably bolted to the front stay 51. The straw conveying device 12 is detachably bolted to the rear stay 52.

  A straw transport space S of the straw transport device 12 is formed behind the rear wall 30. The straw conveying space S is formed so as to straddle the straw frame 50 in the longitudinal direction of the machine. In a plan view, the straw discharge space S is widened so as to be located closer to the center in the left and right direction of the machine in the middle of the straw discharge space S in the front and rear direction (a position corresponding to the front end of the inclined portion 35a).

(Belt transmission mechanism)
As shown in FIGS. 6, 8 and 9, a belt transmission mechanism 53 that transmits the power of the transmission shaft 34 to the straw transporting device 12 is provided across the transmission shaft 34 and the straw transporting device 12. . The belt transmission mechanism 53 includes a driving pulley 54, a driven pulley 55, and a transmission belt 56. The drive pulley 54 is fixed to a portion of the transmission shaft 34 that projects rearward from the rear fixed wall 32. The driven pulley 55 is fixed to an input shaft (not shown) of the straw conveying device 12. The transmission belt 56 is wound around the driving pulley 54 and the driven pulley 55.

[Tension clutch mechanism]
A tension clutch mechanism 57 that switches the belt transmission mechanism 53 between a transmission state in which power is transmitted to the straw conveying device 12 and a cutoff state in which transmission of power to the straw conveying device 12 is blocked is provided. The tension clutch mechanism 57 includes a first tension arm 58, a first tension roller 59, a second tension arm 60, a second tension roller 61, and a tension spring 62. The first tension arm 58 is rotatably supported by the transmission shaft 34. A first tension roller 59 is rotatably supported at the distal end of the first tension arm 58. The first tension roller 59 is in contact with a portion of the transmission belt 56 corresponding to the lower path from above. A mounting portion 63 to which the tension spring 62 is mounted is provided at a base end of the first tension arm 58.

  The second tension arm 60 is fixed to the first tension arm 58 so as to be able to rotate integrally with the first tension arm 58. A second tension roller 61 is rotatably supported at the distal end of the second tension arm 60. The second tension roller 61 is in contact with a portion of the transmission belt 56 corresponding to the upper path from above.

  The tension spring 62 urges the first tension arm 58 and the second tension arm 60 to swing around the swing axis Y2 in the tension applying direction. The end of the tension spring 62 opposite to the attachment portion 63 is attached to a rod 64. The rod 64 is supported by the stay 65 so that the position can be adjusted. The stay 65 is fixed (for example, welded and fixed) to the straw frame 50 (front frame 67). By adjusting the position of the rod 64 with respect to the stay 65, the urging force of the tension spring 62 changes.

[Straw frame]
As shown in FIGS. 6 to 11, the straw frame 50 supports a front part and a rear part of the straw conveying device 12 via a front stay 51 and a rear stay 52. The straw frame 50 is formed in a frame shape. The straw frame 50 includes a base frame 66, a front frame 67, a rear frame 68, and a free end frame 69. One round pipe is bent to form a front frame 67, a rear frame 68, and a free end frame 69. The front part of the straw conveying device 12 is supported by the free end frame 69 via the front stay 51. A rear portion of the straw transport device 12 is supported by a rear stay 68 at a portion of the rear frame 68 on the right and left center side of the machine body.

  The straw frame 50 swings up and down around the swing axis Y2 between the lower position where the straw transport device 12 transports the straw and the raised position where the straw transport device 12 does not transport the straw. It is movable. The straw frame 50 can swing up and down around a support shaft 70 extending in the longitudinal direction of the machine. A pair of front and rear gas dampers 71 for swinging the straw frame 50 upward is provided. The gas damper 71 is provided over the straw frame 50 (front frame 67) and the lower stay 72. An upper stay 73 to which the gas damper 71 is connected is fixed (for example, welded and fixed) to the front frame 67.

  As shown in FIGS. 12 to 14, the base frame 66 is provided on the base side of the straw frame 50 and extends in the longitudinal direction of the machine. The base frame 66 includes a front frame portion 74 constituting a front portion, a rear frame portion 75 constituting a rear portion, and a connecting frame portion extending between the front frame portion 74 and the rear frame portion 75. 76. A front portion (front frame portion 74) of the base frame 66 is supported by the support shaft 70 via a pair of front and rear stays 77.

  In the base frame 66, at a position corresponding to the connecting frame portion 76, a stepped portion 66a that falls down is formed. The connection frame portion 76 includes a channel plate 78 that opens downward and a connection plate 79. The channel plate 78 is provided over the lower surface of the front frame portion 74 and the lower surface of the rear frame portion 75. A connecting plate 79 that connects the left and right walls of the channel plate 78 is provided inside the channel plate 78.

  The front frame 67 is connected to the front end of the base frame 66 and extends outward from the support shaft 70 in the lateral direction of the body. The rear frame 68 is connected to the rear end of the base frame 66 and extends outward from the support shaft 70 in the lateral direction of the vehicle.

  The free end frame 69 is provided on the free end side of the straw frame 50 and extends in the longitudinal direction of the machine. The free end frame 69 is connected to an outer end of the front frame 67 in the left-right direction of the vehicle and to an outer end of the rear frame 68 in the left-right direction of the vehicle. At the lowered position, the free end frame 69 extends along the left front-rear frame 36L, and is adjacent to the left front-rear frame 36L in a state of being located on the right of the left front-rear frame 36L.

  The support shaft 70 is a shaft different from the transmission shaft 34, and is supported by a right-side frontward-facing frame 36R that supports the transmission shaft 34. The transmission shaft 34 and the support shaft 70 are arranged on the same axis (swing axis Y2). The support shaft 70 is disposed on the front side of the middle part in the front and rear of the straw transport space S (a position corresponding to the front end of the inclined portion 35a). The right front-rear frame 36R extends to the rear side of the support shaft 70. The support shaft 70 is supported by a bracket 81 via a pair of front and rear stays 80. The bracket 81 is suspended from the lower surface of the right front-facing frame 36R. The stay 80 is fixed to the bracket 81 by bolts. A lower stay 72 is supported by the front stay 80.

(Positioning mechanism)
As shown in FIG. 14, in a state where the straw frame 50 is located at the lowering position, the free end side (the free end) of the straw frame 50 is adjusted so that the straw frame 50 does not shift (position shifts in the longitudinal direction of the machine body or the like). A positioning mechanism 82 for positioning the end frame 69) on the rear frame 37 is provided. The positioning mechanism 82 includes a claw portion 83 and an inserted portion 84 into which the claw portion 83 is inserted. The claw portion 83 is supported by the free end frame 69 via a stay 85. The claw portion 83 is detachably fixed to the stay 85 by a bolt 86. The inserted portion 84 is fixed (for example, fixed by welding) to the rear frame 37. When the claw portion 83 is inserted into the insertion target portion 84, the straw frame 50 is positioned at the lowered position so that the straw frame 50 is not displaced (displaced in the longitudinal direction of the machine, etc.). The free end side (free end frame 69) of 50 is positioned on the rear frame 37.

(Connecting mechanism)
As shown in FIGS. 14 and 15, a connection mechanism 87 is provided to connect the upper frame 40 (the left-right front-facing frame 36 </ b> L) and the straw frame 50 (the free end frame 69) so that the connection can be released. The connection mechanism 87 is capable of connecting the front-rear frame 36L on the left side and the end (the free end frame 69) of the straw frame 50 on the outside of the body in the body left-right direction. The coupling mechanism 87 is provided over the upper part of the left-back frame 36L and the upper part of the free end frame 69. The connection mechanism 87 includes an upper-side fixing bracket 88, a straw-side fixing bracket 89, and a connection bracket 90. The upper side fixing bracket 88 is fixed (for example, welded and fixed) to the left front-rear frame 36L. The straw-side fixing bracket 89 is fixed to the front part of the free end frame 69 (for example, by welding). The connection bracket 90 is provided over the upper surface of the upper fixing bracket 88 and the upper surface of the straw-side fixing bracket 89. The connection bracket 90 is connected to each of the upper-side fixing bracket 88 and the straw-side fixing bracket 89 by a bolt 91 so that the connection can be released. That is, the connection mechanism 87 can release the connection to each of the left front-rear frame 36L and the free end frame 69.

[Inside lock mechanism]
As shown in FIG. 16 and FIG. 17, in a state where the straw frame 50 is located at the lowered position, the base side (the base frame 66) of the straw frame 50 is held at the right front-rear frame 36 </ b> R. A lock mechanism 92 is provided. The inner lock mechanism 92 holds the rear portion of the base frame 66 at the right front-facing frame 36R. The inside lock mechanism 92 includes an inside hook 93 and an inside hook pin 94.

  The inner hook 93 is detachably fixed to the right side wall of the connection frame portion 76 (channel plate 78) of the base end frame 66 by a bolt 95. The inner hook 93 includes a pair of front and rear hook portions 93a. A connecting plate 93b is provided to connect the front hook portion 93a and the rear hook portion 93a.

  The inner hook pin 94 is supported by the right front-facing frame 36R via the first stay 96 and the second stay 97. The first stay 96 is fixed (for example, welded and fixed) to the right front-facing frame 36R. The second stay 97 is detachably fixed to the first stay 96 by a bolt 98. The inner hook pin 94 is provided over the front wall and the rear wall of the second stay 97.

[Operation of inner lock mechanism]
The inner lock mechanism 92 follows the swinging of the straw frame 50 to the lower position, engages with the right-side front-facing frame 36R, and swings the straw frame 50 to the upper position. , The engagement with the right front-rear frame 36R is released.

  More specifically, the inner hook 93 engages with the inner hook pin 94 as the straw frame 50 swings to the lower position. Then, the engagement of the inner hook 93 with the inner hook pin 94 is released following the swing of the straw frame 50 toward the ascending position. Here, when the straw frame 50 swings from the lowered position to the raised position, the inner hook pin 94 enters the step 66a. This prevents the base frame 66 from interfering with the inner hook pins 94 when the straw frame 50 swings up and down.

[Outside lock mechanism]
As shown in FIGS. 18 and 19, an outer lock mechanism 100 that holds the free end side (free end frame 69) of the straw frame 50 in the rear frame 37 in a state where the straw frame 50 is located at the lowered position. Is provided. The outer locking mechanism 100 includes an outer hook 101 and an outer hook pin 102. The outer hook 101 includes a base 101a and a hook 101b. The hook portion 101b is detachably fixed to the base portion 101a by a bolt 103.

  The outer hook pin 102 is disposed on the left side of the rear frame 37 and at a position slightly away from the rear frame 37. The outer hook pin 102 is supported by the rear frame 37 via a first stay 104 and a second stay 105 (see FIG. 14).

  The outer lock mechanism 100 holds the rear part of the left front-rear frame 36L on the rear frame 37. The left front-rear frame 36L and the rear frame 37 are releasably connected by an outer lock mechanism 100. The rear frame 37 is located to the right of the left front-facing frame 36L in a state where the left front-facing frame 36L and the rear frame 37 are connected by the outer locking mechanism 100. That is, the rear frame 37 is provided with a portion adjacent to the left front-rear frame 36L while being connected to the left front-rear frame 36L by the outer lock mechanism 100. The free end frame 69 is in contact with the rear frame 37 in the up-down direction in a state where the left front-rearward frame 36L and the rear frame 37 are connected by the outer lock mechanism 100. Specifically, the free end frame 69 is in contact with the rear frame 37 from above with respect to the rear frame 37 in a state where the left front-rear frame 36L and the rear frame 37 are connected by the outer lock mechanism 100. That is, the free end frame 69 is vertically sandwiched between the rear frame 37 and the connecting mechanism 87 (the straw-side fixing bracket 89) (sandwich structure).

[Link mechanism]
As shown in FIGS. 6 to 9, a link mechanism 106 for interlocking connection between the handling cylinder lock mechanism 42 (the rear hook plate 43) and the outer lock mechanism 100 (the outer hook 101) is provided. The link mechanism 106 includes a first link arm 107, a second link arm 108, and a link rod 109. The first link arm 107 is connected to the base end of the hook plate 43 on the rear side so as to be relatively swingable. The first link arm 107 and the second link arm 108 are connected to be relatively swingable.

  The link rod 109 is supported by the front-rear frame 36L on the left side via the front stay 110 and the rear stay 111. The link rod 109 is rotatably supported by the front stay 110 and the rear stay 111. A second link arm 108 is connected to the front end of the link rod 109 so as not to swing relatively. The outer hook 101 is connected to the rear end of the link rod 109 so as not to swing relatively.

(Elevation operation section)
As shown in FIG. 20, an elevating operation unit 112 for elevating operation is provided in the driving unit 4. The raising / lowering operation unit 112 includes a power switch 113, a raising switch 114, and a lowering switch 115. When performing the raising operation, the raising switch 114 and the power switch 113 are simultaneously pressed and operated. The raising operation is performed only while the raising switch 114 and the power switch 113 are simultaneously pressed. When performing the lowering operation, the lowering switch 115 and the power switch 113 are simultaneously pressed. The lowering operation is performed only while the lowering switch 115 and the power switch 113 are simultaneously pressed. The lifting operation unit 112 may be provided, for example, on the left side of the threshing device 10 so that a worker can operate from outside the machine in addition to (or instead of) the operation unit 4.

[Rear upper cover]
As shown in FIGS. 2, 6, 23, and 24, a rear upper cover 116 that covers the straw conveying device 12 from above and behind is provided. The rear upper cover 116 has a main body 117 and an upper portion 118.

  The main body 117 has a cutout 117a that opens forward. The notch 117a is formed in a horizontally long, substantially trapezoidal shape in plan view. The length of the front edge of the notch 117a (length in the left-right direction of the machine) is longer than the length of the rear edge of the notch 117a (length in the left-right direction of the machine).

  The upper part 118 is located above the rear part of the straw conveying device 12 in the rear upper cover 116. The upper part 118 overlaps with the rear part of the straw conveying device 12 in plan view. The upper portion 118 is provided in the notch 117a so as to close the notch 117a. The upper portion 118 is supported by the main body 117 via a support shaft 119 extending in the left-right direction on the rear side of the upper portion 118 so as to be vertically swingable. The upper portion 118 swings up and down around a support shaft 119 extending in the lateral direction of the body at the rear side of the upper portion 118 between a closed position for closing the straw transport space S and an open position for opening the straw transport space S. It is possible.

(Interlocking mechanism)
An interlocking mechanism 120 is provided for swinging the upper portion 118 to the open position in conjunction with the swinging of the straw frame 50 to the ascending position. The interlocking mechanism 120 includes an arm 121 and a roller 122. The arm 121 extends from the straw frame 50 (the rear frame 68) to a position below the upper portion 118. A roller 122 capable of contacting the contact portion 126c from below is provided at the distal end of the arm 121. The roller 122 is rotatable around a rotation axis extending in the longitudinal direction of the vehicle. The arm 121 is detachably fixed to an arm stay 123 by a bolt 124. The arm stay 123 is fixed to the rear frame 68 (for example, fixed by welding).

  A main body stay 125 is fixed to the inner surface of the main body 117 by bolts. An upper portion stay 126 is fixed (for example, welded and fixed) to the inner surface of the upper portion 118. A support shaft 119 is provided between the main body stay 125 and the upper partial stay 126. The upper partial stay 126 includes a pair of left and right support portions 126a that support the support shaft 119, a mounting portion 126b to which the spring 127 is mounted, and a contact portion 126c to which the roller 122 can contact. The contact portion 126c is formed by a plate-like portion extending in the lateral direction of the vehicle body along the inner surface of the upper portion 118.

  A spring 127 is provided to urge the upper portion 118 to swing toward the closed position. The spring 127 is provided over the upper part 118 and the main body 117. The end of the spring 127 on the upper part 118 side is attached to the attachment part 126b. The main body 117 is provided with a mounting portion 128 to which the spring 127 is mounted. The end of the spring 127 on the side of the main body 117 is attached to the attachment portion 128.

  The upper portion 118 is formed in a shape slightly larger than the notch 117a in a plan view. The edge of the upper portion 118 abuts against the edge corresponding to the cutout portion 117a of the main body 117 from above, thereby preventing the upper portion 118 from swinging below the closed position. . That is, the edge portion of the upper portion 118 and the edge portion of the main body portion 117 corresponding to the cutout portion 117a constitute a blocking portion 129 that prevents the upper portion 118 from swinging below the closed position. ing.

[Up and down movement of upper frame and straw frame]
As shown in FIGS. 8 and 9, when the worker performs the lifting operation by the lifting / lowering operation unit 112, the pair of front and rear hook plates 43 is swung toward the disengagement side by the motor M. Thereby, the engagement of the hook plate 43 (the hook portion 43a) with the handle cylinder hook pin 44 is released. The outer hook 101 is swung toward the disengagement side in conjunction with the swing of the rear hook plate 43 toward the disengagement side.

  In the connection state in which the upper frame 40 and the straw frame 50 are connected by the connection mechanism 87, as shown in FIGS. 9 and 21, when the engagement of the outer hook 101 with the outer hook pin 102 is released, The frame 40 and the straw frame 50 are swung upward by the hydraulic cylinder 41. At this time, the handle cylinder 11, the belt transmission mechanism 53, and the tension clutch mechanism 57 are also swung upward by the hydraulic cylinder 41 together with the upper frame 40 and the straw frame 50. Therefore, the positional relationship between the pulleys (the driving pulley 54 and the driven pulley 55) in the belt transmission mechanism 53 does not change.

  Then, the engagement of the inner hook 93 with the inner hook pin 94 is released following the swing of the straw frame 50 toward the ascending position. Thus, the upper frame 40 and the straw frame 50 are integrally raised to the same ascending limit height.

  Further, when the straw frame 50 swings to the ascending position side, the arm 121 pushes up the upper portion 118 via the roller 122 in conjunction with the swinging of the straw frame 50 to the ascending position side. In this way, the upper portion 118 swings to the open position in conjunction with the swinging of the straw frame 50 to the up position.

  Then, when the operator performs the lowering operation by the raising / lowering operation unit 112, the upper frame 40 and the straw frame 50 are pivoted downward with the contraction operation of the hydraulic cylinder 41. Then, the inner hook 93 engages with the inner hook pin 94 following the swing of the straw frame 50 toward the lowering position.

  When the upper frame 40 and the straw frame 50 are located at the lowered position, the pair of front and rear hook plates 43 is swung toward the engagement side by the motor M. Thereby, the hook plate 43 (the hook portion 43a) is engaged with the handle cylinder hook pin 44. Then, in conjunction with the swing of the rear hook plate 43 toward the engagement side, the outer hook 101 swings toward the engagement side.

  On the other hand, in a state in which the connection between the upper frame 40 and the straw frame 50 is released (disconnection state), as shown in FIG. Only the upper frame 40 of the frame 40 and the straw frame 50 is swung upward by the hydraulic cylinder 41. At this time, the handle cylinder 11 and the tension clutch mechanism 57 are also swung upward by the hydraulic cylinder 41 together with the upper frame 40. When only the upper frame 40 of the upper frame 40 and the straw frame 50 is swung upward, the transmission belt 56 needs to be removed from the drive pulley 54 in advance. In this way, only the upper frame 40 of the upper frame 40 and the straw frame 50 rises to the rising limit height.

  Then, the straw frame 50 is swung upward by the gas damper 71, whereby the straw frame 50 is raised to the above-mentioned ascending limit height. As described above, when the straw conveying device 12 is detachable from the straw frame 50, if the straw conveying device 12 is detached from the straw conveying device 12, only the straw frame 50 is swung upward. be able to.

  Next, a state in which the upper frame 40 and the straw frame 50 can be integrally raised to the same rising limit height (hereinafter referred to as a “first mode”), and a different rising limit in which the upper frame 40 and the straw frame 50 are different. An embodiment that can be switched to a state in which it can be raised to a height (hereinafter, referred to as a “second mode”) will be described with reference to FIGS.

  As shown in FIG. 25, in the first mode, the ascending limit height of the upper frame 40 and the ascending limit height of the straw frame 50 are set to the same ascending limit height H1. The swing angle of the upper frame 40 and the swing angle of the straw frame 50 are set to the same swing angle α.

  In the second mode, the rising limit height of the upper frame 40 and the rising limit height of the straw frame 50 are set to different rising limit heights. Specifically, the ascending limit height of the upper frame 40 is set to the ascending limit height H1, and the ascending limit height of the straw frame 50 is set at a position (ascending) lower than the ascending limit height H1. The limit height is set to H2). That is, the upper limit height H1 of the upper frame 40 by the hydraulic cylinder 41 is set to a position higher than the upper limit height H2 of the straw frame 50 by the gas damper 71.

  Further, the swing angle of the upper frame 40 and the swing angle of the straw frame 50 are set to different swing angles. Specifically, the swing angle of the upper frame 40 is set to the swing angle α, and the swing angle of the straw frame 50 is smaller than the swing angle α (swing angle β). Is set to

  In the example shown in FIGS. 26 to 28, as a lifting mechanism of the upper frame 40 and the straw frame 50, a hydraulic cylinder 41 that swings the upper frame 40 upward, a gas damper 71 that swings the straw frame 50 upward, and , A connection mechanism 87 that connects the upper frame 40 and the straw frame 50 so that the connection can be released. 26 to 28, the coupling mechanism 87 functions as a switching mechanism for switching between the first mode and the second mode. FIG. 26 shows a state in which the upper frame 40 and the straw frame 50 are located at the lowered position.

  As shown in FIG. 27, in the first mode, the upper frame 40 and the straw frame 50 are connected by the connecting mechanism 87 (connected state). In this connection state, the upper frame 40 and the straw frame 50 are swung upward by the hydraulic cylinder 41 such that the upper frame 40 and the straw frame 50 are integrally raised to the same rising limit height H1.

  In this case, by disconnecting the gas damper 71 and the straw frame 50 in advance, the straw frame 50 exceeds the maximum extension length of the gas damper 71 (corresponding to the ascending limit height H2). Even if the gas damper 71 is raised to the rising limit height H1, the gas damper 71 is not damaged.

  As shown in FIG. 28, in the second mode, the connection between the upper frame 40 and the straw frame 50 is released (the connection is released). In this disconnected state, the upper frame 40 is swung upward by the hydraulic cylinder 41 so that the upper frame 40 rises to the rising limit height H1.

  Then, the straw frame 50 can be swung upward by the gas damper 71 so that the straw frame 50 rises to the rising limit height H2.

  As shown in FIGS. 29 to 31, the upper frame 40 is provided with a holding portion 40 a for holding the straw frame 50 from above, and the end of the gas damper 71 on the straw frame 50 side is provided with the straw frame 50. May be mounted on the gas damper 71 so as to be separated upward. Also in the examples shown in FIGS. 29 to 31, the coupling mechanism 87 functions as a switching mechanism for switching between the first mode and the second mode. FIG. 29 shows a state where the upper frame 40 and the straw frame 50 are located at the lowered position.

  As shown in FIG. 30, in the first mode, the upper frame 40 and the straw frame 50 are connected by the connecting mechanism 87 (connected state). In this connection state, the upper frame 40 and the straw frame 50 are swung upward by the hydraulic cylinder 41 such that the upper frame 40 and the straw frame 50 are integrally raised to the same rising limit height H1.

  At this time, as described above, since the straw frame 50 is placed at the end of the gas damper 71 on the straw frame 50 side so as to be able to be separated upward from the gas damper 71, the straw frame 50 is attached to the gas damper 71. When it rises beyond the maximum extension length of 71 (corresponding to the rising limit height H2), the straw frame 50 separates upward from the gas damper 71. Accordingly, even if the straw frame 50 rises beyond the maximum extension length of the gas damper 71 (corresponding to the rising limit height H2) to the rising limit height H1, the gas damper 71 is not damaged.

  As shown in FIG. 31, in the second mode, the connection between the upper frame 40 and the straw frame 50 is released (the connection release state). In this disconnected state, the upper frame 40 is swung upward by the hydraulic cylinder 41 so that the upper frame 40 rises to the rising limit height H1.

  Then, the straw frame 50 can be swung upward by the gas damper 71 so that the straw frame 50 rises to the rising limit height H2.

  Thereafter, when the upper frame 40 descends, the presser 40a presses the straw frame 50 from above, and the gas damper 71 automatically contracts, so that the straw frame 50 descends together with the upper frame 40. .

  In the examples shown in FIGS. 26 to 28 and the examples shown in FIGS. 29 to 30, a lock mechanism (not shown) for holding the straw frame 50 in the rear frame 37 may be provided. Thereby, in the second mode, even if the upper frame 40 is raised, the lock frame can hold the straw frame 50 on the rear frame 37 so that the straw frame 50 does not rise.

  Although not shown, an electric actuator (not shown) is employed as an actuator for vertically swinging the upper frame 40 instead of the hydraulic cylinder 41, and the straw frame 50 is vertically swinged instead of the gas damper 71. An electric actuator (not shown) may be employed as the actuator to be moved. The electric actuator may be any of an electric motor and an electric cylinder. In this example, a control device (not shown) for controlling the electric actuator has a function of switching between the first mode and the second mode.

  In this example, in the second mode, when the upper frame 40 and the straw frame 50 are raised to the rising limit height H2 by the worker performing the lifting operation by the lifting operation unit 112, the upper frame 40 and the straw frame 50 are moved. Stops once at the ascending limit height H2. Thereafter, when the worker performs the lifting operation again by the lifting operation unit 112, only the upper frame 40 is raised to the rising limit height H1.

  Further, in this example, the lifting operation unit 112 may be configured as follows. That is, in the first mode, an elevating operation unit (elevation switch, descent switch) for elevating and lowering the upper frame 40 and the straw frame 50, and in the second mode, an elevating operation unit (elevation switch, elevating the upper frame 40). A descent switch) and an elevating operation unit (elevation switch, descent switch) for elevating and lowering the straw frame 50 in the second mode may be provided.

[Another embodiment]
(1) In the above embodiment, the outer lock mechanism 100 is employed. Instead, an outer lock mechanism 200 may be employed.

  As shown in FIGS. 32 and 33, the outer lock mechanism 200 includes an outer hook 201, an outer hook arm 202, an outer hook spring 203, and an outer hook pin 102. The outer hook 201 is swingably supported by a rear surface portion of the rear stay 111 via a support shaft 204. An outer hook spring 203 is provided between the outer hook 201 and the rear surface of the rear stay 111 to urge the outer hook 201 to swing toward the engagement side. The outer hook arm 202 is fixed to the rear end of the link rod 109. An opening 201 a is formed in the outer hook 201. The outer hook arm 202 is provided with a pin 202a projecting rearward. The pin 202a is located in the opening 201a. According to such a configuration, when the outer hook arm 202 engages with the opening 201a via the pin 202a, the outer hook pin 102 swings to the engagement side. At this time, the outer hook 201 can be quickly engaged with the outer hook pin 102 by the urging force of the outer hook spring 203.

(2) In the above embodiment, the stepped portion 66a is formed in the base frame 66. However, as shown in FIG. 34, a portion corresponding to the stepped portion 66a may not be formed in the base end frame 66. In this case, since the vertical position of the inner hook 93 is higher than that of the above embodiment, the vertical position of the inner hook pin 94 may be higher than that of the above embodiment.

(3) In the above embodiment, if the switching plate 29a is in the open state (state of the cutting position), after the switching plate 29a is switched to the closed state (state of the non-cutting position), the straw frame 50 is raised. You may make it. Further, when the straw frame 50 is raised, the switching plate 29a may not be switched to the open state (the state of the cutting position).

(4) In the above embodiment, the connection mechanism 87 extends over the upper part of the left-side frontward frame 36L and the upper part of the free end frame 69. However, instead of this, the connecting mechanism 87 may extend between the lower part of the left front-facing frame 36L and the lower part of the free end frame 69.

(5) In the above embodiment, the connection mechanism 87 can release the connection to each of the left front-rearward frame 36L and the free end frame 69. However, instead of this, the connection mechanism 87 may be able to release the connection to any one of the left front-back frame 36L and the free end frame 69.

(6) In the above-described embodiment, the connection mechanism 87 connects the left front-rearward frame 36L and the free end frame 69 so that the connection can be released. However, instead of this, the connecting mechanism 87 may releasably connect the portion of the upper frame 40 other than the left-back frontward frame 36L and the portion of the straw frame 50 other than the free end frame 69. .

(7) In the above embodiment, the handling cylinder 11 can be swung upward by the hydraulic cylinder 41 together with the upper frame 40. However, instead of this, only the upper frame 40 may be swingable upward by the hydraulic cylinder 41.

(8) In the above embodiment, the connection mechanism 87 is a bolt type (bolt 91) connection structure. However, instead of this, the connection mechanism 87 may be a one-touch connection structure using a lever or the like.

  INDUSTRIAL APPLICABILITY The present invention is applicable not only to a combine with a cabin but also to a combine without a cabin.

Reference Signs List 9 feed chain 10 threshing device 11 handling cylinder 12 straw conveying device 36L front-back frame 37 rear frame 38 upper cover 40 upper frame 41 hydraulic cylinder (actuator)
50 Waste straw frame 67 Front frame (horizontal frame)
68 Rear frame (horizontal frame)
69 Free end frame (outer frame)
87 Connecting mechanism Y2 Oscillating shaft center

Claims (1)

A feed chain for pinching and transporting the harvested grain culm;
A threshing device that thresh-processes the harvested grain culm conveyed by the feed chain by a handling cylinder,
A combine provided with a straw transporting device that is connected to the rear side of the threshing device and receives the straw after the threshing process from the feed chain and pinches and transports the straw backward.
An upper frame that supports the handling cylinder and that can swing up and down around a swing axis extending in the longitudinal direction of the aircraft,
The swing shaft center supports the straw conveying device, and extends between a lower position where the straw conveying device conveys the straw and an ascending position where the straw conveying device does not convey the straw. A combine frame provided with a straw frame that can swing vertically.

Images