JP6847025B2 - combine - Google Patents

Description

The present invention includes a feed chain that sandwiches and transports the harvested grain straw, a threshing device that has a handling barrel and threshing the harvested grain straw that is transported by the feed chain, and a feed chain that is connected to the rear side of the grain removal device. A straw transporting device that receives the threshed straw after threshing and transports it by sandwiching it backward, and a straw transporting device that is provided below the transport end side of the straw transporting device and cuts the straw that has been transported by the straw transporting device. Regarding a combine equipped with a straw cutting device.

As the combine as described above, for example, the combine described in Patent Document 1 is already known. The combine described in Patent Document 1 has a feed chain (“threshing feed chain [38]” in the document) for sandwiching and transporting the harvested grain straw, and a threshing grain tray that has a handling barrel and is transported by the feed chain. A threshing device (“threshing device [17]” in the literature) and a straw transporting device (literature) that is connected to the rear side of the threshing device and receives the straw after the threshing process from the feed chain and holds and transports the straw backward. Then, "the straw-removing transfer device [23]") and the straw-removing cutting device (in the literature, "" A post-processing device [22] ”) and is provided. The straw cutting device has a working position located below the transport end side portion of the straw transport device around a swing axis (“Y axis” in the literature) extending in the vertical direction on the left and right one end side, and a straw dumping device. It can swing over a non-working position located away from below the transport end side portion of the transport device.

In Patent Document 2, a state in which the straw transporting device (“straw transporting device [15]” in the document) is tilted so as to be located on one side in the left-right direction of the machine toward the transporting end side of the straw transporting device in a plan view. A straw frame that can swing up and down around the swing axis (“rotation axis [45]” in the literature) that extends in the front-rear direction of the fuselage on one side in the left-right direction of the fuselage. A combine with a frame [31] ") is disclosed.

Japanese Unexamined Patent Publication No. 2008-295395 Japanese Unexamined Patent Publication No. 2012-50339

Here, as the straw exhaust frame is swung upward, the transport end side portion of the straw excretion transport device is lowered, and the position of the transport end side portion of the straw shredding device is the straw exhaust frame. The higher the ascending position of, the lower it becomes. In addition, in the state where the straw cutting device is located between the working position and the non-working position (the state where the straw cutting device is located at a position that is neither the working position nor the non-working position), It is possible that the upper end of the straw cutting device is located directly below the transport end side of the straw transport device. For this reason, when the straw removal frame is raised to a relatively high rising position while the straw cutting device is located between the working position and the non-working position, the transport end side portion of the straw transporting device is discharged. There is a risk of contact with the upper end of the straw cutting device.

By the way, by moving the installation position of the straw excretion transport device to the upper side or moving the installation position of the straw excretion cutting device to the lower side, the vertical distance between the straw excretion transport device and the straw excretion cutting device can be increased. There is also the idea of expanding and avoiding the above-mentioned contact. However, simply moving the installation position of the straw transport device and the straw cutting device is to transfer the straw between the feed chain and the straw transport device, or from the straw transport device to the straw cutting device. It is not a good idea to supply straw well.

In view of the above situation, a situation in which the transport end side portion of the straw transport device comes into contact with the straw cutting device when raising the straw frame while maintaining the installation position of the straw transport device and the straw cutting device properly. There is a demand for a combine that can avoid the problem.

The feature of the present invention is
A feed chain that holds and transports harvested culms,
A threshing device having a handling cylinder and threshing the harvested culm conveyed by the feed chain,
A straw transporting device that is connected to the rear side of the threshing device, receives the straw after the threshing process from the feed chain, and sandwiches and transports the straw to the rear.
A combine that is provided below the transport end side portion of the straw transport device and is provided with a straw cutting device that cuts the straw transported by the straw transport device.
The straw cutting device has a working position located below a transport end side portion of the straw transport device and a transport end of the straw transport device around a swing axis extending in the vertical direction on the left and right one end side. It can swing over a non-working position located away from below the side part,
The straw transporting device is supported in a state of being inclined so as to be located on one side in the left-right direction of the machine toward the end side of the transporting of the straw-exhausting transport device in a plan view, and extends in the front-rear direction of the machine on the one side in the left-right direction of the machine. Equipped with a straw frame that can swing up and down around the swing axis,
At least the first ascending position and the second ascending position lower than the first ascending position are set as the ascending limit of the straw exhaust frame.
In the state where the straw cutting device is located at the working position and the state where the straw cutting device is located at the non-working position, the straw frame is raised to the first rising position, respectively. It is possible and
In a state where the straw-removing device is located between the working position and the non-working position, the straw-removing frame can be raised to the second rising position.

According to this feature configuration, the straw cutting device is located between the working position and the non-working position (the straw cutting device is located at a position that is neither the working position nor the non-working position). In this state), the straw frame is raised only to the second rising position, which is lower than the first rising position. As a result, it is possible to avoid a situation in which the transport end side portion of the straw discharge transport device comes into contact with the straw discharge cutting device when the straw discharge frame is raised. In addition, since the installation position of the straw-removing transport device and the installation position of the straw-removing cutting device are not moved, the installation positions of the straw-removing transport device and the straw-removing cutting device can be properly maintained.

Further, in the present invention
The second ascending position is preferably a position where the transport end side portion of the straw transport device does not interfere with the straw cutting device.

According to this feature configuration, even if the straw cutting device is switched between the working position and the non-working position while the straw removing frame is raised to the second rising position, the straw cutting device is the straw transporting device. There is no contact with the transport end side part. As a result, as described above, when the straw-removing device is located between the working position and the non-working position, the straw-removing frame can be raised only to the second rising position, but the straw is discharged. After the straw cutting device is switched to the working position or the non-working position while the frame is raised to the second rising position, the straw-exhausting frame can be raised to the first rising position.

Further, in the present invention
The second ascending position is preferably a position where the clogging of the straw discharging device can be cleared.

According to this feature configuration, as described above, the straw cutting device is located in the working position, the straw cutting device is located in the non-working position, and the straw cutting device is in the working position. The straw-exhausting frame can be raised to the second ascending position in any state of being located in the middle of the non-working position, and by raising the straw-exhausting frame to the second ascending position, the straw is discharged. It is possible to clear the clogging of the straw transport device.

Further, in the present invention
The straw cutting device includes a cutter that cuts straw, an inlet that is located above the cutter and into which straw is injected, a cutting position that opens the inlet, and a non-cutting position that closes the inlet. With a switching plate that can be switched to,
In the state where the straw cutting device is located at the working position, the switching plate can be used regardless of whether the straw frame is raised to the first rising position or the second rising position. It is preferable that the cutting position and the non-cutting position cannot be switched.

If the straw frame is raised while the straw cutting device is located at the working position, the transport end side portion of the straw transport device gradually approaches the switching plate, and in such a situation, When the switching plate is switched between the cutting position and the non-cutting position, the switching plate may come into contact with the transport end side portion of the straw transport device. According to this feature configuration, when the straw cutting device is located at the working position, the switching plate can be raised regardless of whether the straw frame is raised to the first rising position or the second rising position. It is not possible to switch between the cut position and the non-cut position, which makes it possible to avoid a situation in which the switching plate comes into contact with the transport end side portion of the straw transport device.

Further, in the present invention
The straw cutting device includes a cutter that cuts straw, an inlet that is located above the cutter and into which straw is injected, a cutting position that opens the inlet, and a non-cutting position that closes the inlet. With a switching plate that can be switched to,
In the state where the straw cutting device is located in the non-working position, the switching plate can be operated regardless of whether the straw frame is raised to the first rising position or the second rising position. It is preferable that the cutting position and the non-cutting position can be switched.

In the state where the straw cutting device is located in the non-working position, the transport end side portion of the straw transport device is located away from the switching plate. According to this feature configuration, when the straw cutting device is located in the non-working position, the switching plate is used regardless of whether the straw frame is raised to the first rising position or the second rising position. Can be switched between a cutting position and a non-cutting position, whereby the switching plate can be switched between a cutting position and a non-cutting position without contacting the transport end side portion of the straw transport device.

Further, in the present invention
It is preferable that the straw exhaust frame is configured to pause at the second ascending position when the straw exhausting frame is raised to the first ascending position.

According to this feature configuration, when the straw-exhausting frame is temporarily stopped at the second ascending position and the surrounding conditions are checked, the straw-exhausting transport device is transported when the straw-exhausting frame is raised to the first ascending position. It is possible to reliably avoid the situation where the terminal side portion comes into contact with the straw cutting device.

It is a left side view which shows a head-feeding combine. It is a top view which shows the head-feeding combine. It is a left side view which shows the threshing apparatus. It is a rear view which shows the threshing apparatus in the state which the handling cylinder frame is lowered. It is a rear view which shows the threshing apparatus in the state which raised the handling body frame. It is a top view which shows the rear part of the threshing apparatus and the straw transport apparatus. It is a left side view which shows the rear part of the threshing apparatus and the straw excretion transfer apparatus in the state which the handling body frame and the straw excretion frame are lowered. It is a left side view which shows the rear part of the threshing apparatus and the straw excretion transfer apparatus in the state which raised the handling body frame and the straw excretion frame. It is a rear view which shows the threshing apparatus in the state which the handling body frame and the straw-removing frame are lowered. It is a rear view which shows the threshing apparatus in the state which raised the straw-removing frame and the handling body frame. It is a rear view which shows the straw exhaust transporting apparatus in the state which the straw exhaust frame is located in the descending position. It is a rear view which shows the straw exhaust transporting apparatus in the state which raised the straw exhaust frame. It is an exploded perspective view which shows the handling body frame, the straw exhaust frame and the rear frame. It is an exploded perspective view which shows the structure of the base end side of a straw frame. It is a rear view which shows the straw excretion transporting apparatus and straw excretion cutting apparatus. It is an exploded perspective view which shows the lock mechanism and the interlocking mechanism. It is a top view which shows the lock mechanism and the interlocking mechanism in the state which the straw-excretion frame is located in a descending position. It is a left side view which shows the lock mechanism and the interlocking mechanism in the state which the straw-excretion frame is located in a descending position. It is a left side view which shows the lock mechanism and the interlocking mechanism in the state where the straw-exhaust frame is raised to the second ascending position. It is a left side view which shows the lock mechanism and the interlocking mechanism in the state where the straw-exhaust frame is raised to the first ascending position. It is a figure which shows the relationship between the position of the straw-removing frame, the state of a lock mechanism, and the possibility of switching a straw-removing cutting device. It is a figure which shows the switching mode of the straw excretion cutting apparatus in the state which the straw excretion frame is located in the descending position. It is a figure which shows the switching mode of the straw excretion cutting apparatus in the state which the straw excretion frame is raised to the second ascending position. It is a figure which shows the switching mode of the straw excretion cutting apparatus in the state which the straw excretion frame is raised to the first ascending position. It is a top view which shows the state which is the lock mechanism in a regulated state, and the straw cutting apparatus is located at a working position. It is a top view which shows the state which is the lock mechanism of the regulated state, and the straw cutting apparatus is located at the 1st lock position. It is a top view which shows the state which is the lock mechanism in a regulated state, and the straw cutting device is located in a non-working position. It is a top view which shows the state which is the lock mechanism of the regulated state, and the straw cutting apparatus is located at the 2nd lock position. It is a figure which shows the relationship between the position of the straw cutting device, the swing regulation of a straw cutting device by a lock mechanism, and the alarm by an alarm part. It is a figure which shows the control block. It is a figure which shows the relationship between the position of the straw excretion cutting device, and the ascending limit of a straw excretion frame. It is a figure which shows the relationship between the position of a straw cutting device, the position of a straw frame, and whether or not the switching plate can be switched. It is a figure which shows the ascending limit of the straw-removing frame and the switching mode of a switching plate in a state where a straw-removing cutting device is located at a working position. It is a figure which shows the ascending limit of the straw-removing frame and the switching mode of a switching plate in a state where a straw-removing cutting device is located in a non-working position. It is a figure which shows the ascending limit of the straw excretion frame in the state which the straw excretion cutting device is located at an intermediate position.

[Overall composition of combine harvester]
1 and 2 show a head-feeding combine. This combine includes an airframe frame 1 and a traveling device 2 that supports the airframe frame 1. A driving cabin 3 is provided on the right side of the front part of the fuselage. The driving cabin 3 includes a driving unit 4 on which the driver is boarding and a cabin 5 covering the driving unit 4. An engine (not shown) is provided below the driving unit 4.

In front of the driving cabin 3, a cutting section 6 for cutting the planted culm is provided. A grain storage tank 7 for storing grains is provided behind the operation cabin 3. A grain discharge device 8 for discharging grains in the grain storage tank 7 is provided. A feed chain 9 for sandwiching and transporting the harvested culm is provided on the left side of the machine body. A threshing device 10 is provided on the left side of the grain storage tank 7. The threshing device 10 has a handling cylinder 11 and threshs the harvested culms carried by the feed chain 9. A straw transporting device 12 is continuously provided on the rear side of the threshing device 10. The straw discharge transporting device 12 receives the straw discharged after the threshing process from the feed chain 9 and sandwiches and transports the straw backward. A straw cutting device 28 for cutting the straw transported by the straw transport device 12 is provided below the portion on the transport end side of the straw transport device 12.

The cutting unit 6 is configured to have a plurality of cutting specifications (for example, a six-row cutting specification). The cutting unit 6 includes a plurality of (for example, seven) weeding tools 13, a plurality of (for example, six) raising devices 14, a cutting device 15, and a conveying device 16. The weeding tool 13 weeds the planted culm in the field. The raising device 14 causes a planted culm that has been planted. The cutting device 15 cuts the raised planted culm. The transport device 16 transports the harvested grain culms backward toward the threshing device 10.

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

At the bottom of the threshing device 10, a swing sorting device 20 that swings and sorts the objects to be sorted, a wall insert 21 that blows sorting air to the swing sorting device 20, and the first grain (single grain, etc.) The first collection unit 22 for collecting the wall inserts, the second collection unit 23 for collecting the second grain (grains with branch stems, etc.), and the like are provided.

The first collection unit 22 is provided with the first screw 24 for transporting the grain of the first product to the right. At the right end of the first screw 24, a grain raising device 25 for lifting and transporting the grain of the first grain to the grain storage tank 7 is interlocked and connected.

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

The straw cutting device 28 has a working position located below the transport end side portion of the straw transport device 12 and a transport end of the straw transport device 12 around a swing axis Z1 extending in the vertical direction on the right end side. It can swing over a non-working position located away from below the side portion (see FIG. 2). The straw cutting device 28 includes a cutter 29 for cutting straw, a cover 30 for covering the cutter 29, and a switching plate 31. A slot 30a into which straw is thrown is formed in a portion of the cover 30 located above the cutter 29. A horizontal frame 32 extending in the left-right direction of the machine body is provided over the left side wall and the right side wall in the upper part of the cover 30.

The switching plate 31 can be switched between a cutting position that opens the loading port 30a and a non-cutting position that closes the loading port 30a, and the cutting position on the ascending side and the non-cutting position on the descending side around the swing axis extending in the left-right direction of the machine body. It can be swung open and closed over the position. A motor M1 (see FIG. 30) that swings and drives the switching plate 31 is provided on the right side of the straw cutting device 28. In the state where the switching plate 31 is open (in the state of the cutting position), the straw discharged by the straw discharging device 12 is thrown into the feeding port 30a and cut by the cutter 29. In the closed state (non-cutting position) of the switching plate 31, the straw transported by the straw discharging device 12 slides on the upper surface of the switching plate 31 and falls to the ground.

As shown in FIGS. 3 to 5, wall portions 34 are provided at the front end portion and the rear end portion of the handling chamber 17, respectively. The front wall portion 34 constitutes the front wall portion of the handling chamber 17. The rear wall portion 34 constitutes the rear wall portion of the handling chamber 17. The wall portion 34 includes a movable wall 35 and a fixed wall 36. The handling cylinder 11 is rotatably supported on the movable wall 35 via the handling cylinder shaft 11a. A connecting arm 37 for connecting the movable wall 35 and the fixed wall 36 is provided. The movable wall 35 is supported by the fixed wall 36 so as to be able to swing up and down around the swing axis Y2 extending in the front-rear direction of the machine body via the connecting arm 37. A transmission shaft 38 through which the power of the engine is transmitted is provided over the fixed wall 36 on the front side and the fixed wall 36 on the rear side. Front-rear facing frames 40L and 40R extending in the front-rear direction of the machine body are provided on both left and right sides of the threshing device 10, respectively.

A handling cylinder cover 42 that covers the handling cylinder 11 from above is provided. An upper right cover 43 is provided on the right side of the handle cover 42. The upper right cover 43 is supported by the front-rear frame 40R on the right side so as to swing up and down around the swing axis extending in the front-rear direction of the machine body.

A handling cylinder frame 44 that supports the handling cylinder 11 and can swing up and down around the swing axis Y2 is provided. The handling body frame 44 includes a pair of front and rear movable walls 35 and a left front and rear facing frame 40L. The handling body cover 42 is also supported on the handling body frame 44.

A cylinder 45 for swinging the handling body frame 44 up and down is provided. The cylinder 45 is provided over the rear movable wall 35 and the rear fixed wall 36. In this embodiment, the cylinder 45 is composed of an electric cylinder.

A handling cylinder lock mechanism 46 for holding the handling cylinder 11 at a threshing processing position where the threshing processing is performed is provided. The handling cylinder lock mechanism 46 includes a pair of front and rear hook plates 47 and a pair of front and rear handling cylinder hook pins 48. A hook plate 47 is swingably supported around a swing axis Y3 extending in the front-rear direction of the machine body by each of the front wall portion 34 and the rear wall portion 34. A hook portion 47a that can be engaged with the handling cylinder hook pin 48 is provided at the tip portion of the hook plate 47. By engaging the hook portion 47a with the handling cylinder hook pin 48, the handling cylinder 11 is held at the threshing processing position. When the hook portion 47a is disengaged from the handling cylinder hook pin 48, the handling cylinder 11 is swung upward by the cylinder 45 together with the handling cylinder frame 44. A motor M2 that swings and drives a pair of front and rear hook plates 47 is supported on the rear surface of the rear wall portion 34. The motor M2 swings the pair of front and rear hook plates 47 to the engaging side and the disengaging side.

As shown in FIGS. 6 and 7, a rear frame 41 is provided on the rear upper portion of the left side portion of the threshing device 10. The rear frame 41 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 41 is composed of a round pipe.

The straw ST transported by the straw transport device 12 passes between the upper portion 41a and the lower portion 41b of the rear frame 41. At the rear portion of the rear frame 41, a bent portion 41c that bends laterally (left side) of the machine body in a plan view is formed.

Here, when the rear portion of the rear frame 41 extends straight toward the rear in a plan view (see the rear frame 41 drawn by the alternate long and short dash line shown in FIG. 6), the exhaust is transported by the straw transport device 12. When the straw ST is a straw culm with a long culm (long culm), the stock of the straw ST comes into contact with the vertical portion at the rear end of the rear frame 41 and becomes a resistance to transport, resulting in clogging of the straw ST. May occur.

However, according to the above configuration, since the bent portion 41c is formed at the rear portion of the rear frame 41, the vertical portion 41d at the rear end portion of the rear frame 41 and the straw discharging transport device 12 (stock source transport device 49). ) Becomes longer. As a result, even in the case of the long culm-exhausted straw ST, the straw-exhausted ST can be conveyed by the straw-exhausting transport device 12 without the stock of the straw-exhausting ST coming into contact with the vertical portion 41d. Further, by extending the rear frame 41 rearward, the interval is not lengthened, so that the front-rear length of the airframe is not lengthened.

[Straw transport device]
As shown in FIGS. 6 and 7, the straw discharging device 12 is tilted so as to be located on one side (right side) in the left-right direction of the machine toward the transporting end side of the straw discharging device 12 in a plan view. It is supported by the frame 55. The straw discharge transporting device 12 includes a stock root transporting device 49 that sandwiches and transports the stock root side of the straw, and a tip transporting device 50 that locks and transports the tip side of the straw. The stock source transport device 49 includes a straw discharge chain 51 with a protrusion 51a and a straw discharge rail 52. The straw exhaust rail 52 is arranged below the straw exhaust chain 51 so as to face the lower path of the straw exhaust chain 51. A pair of guide plates 53 for guiding the straw discharge chain 51 are provided at the transfer end portion of the stock source transfer device 49. The tip transfer device 50 includes a straw tip chain 54 with a tine 54a.

The straw transport space S of the straw transport device 12 is formed behind the rear wall portion 34. The straw-removing space S is formed so as to straddle the straw-removing frame 55 in the front-rear direction of the machine body. In a plan view, the straw-exhaust transport space S extends so as to be located on the right side toward the downstream side in the transport direction at the front-rear halfway portion (the portion corresponding to the front end of the inclined portion 39a) of the straw-exhaust transport space S. A belt transmission mechanism 58 is provided across the transmission shaft 38 and the input shaft (not shown) of the straw transfer device 12 to transmit the power of the transmission shaft 38 to the input shaft of the straw transfer device 12.

[Straw frame]
As shown in FIGS. 6 to 14, the straw exhaust frame 55 is tilted so that the straw exhaust transport device 12 is located on one side (right side) of the machine body in the left-right direction toward the transport end side of the straw transport device 12 in a plan view. It can swing up and down around the swing axis Y2 extending in the front-rear direction of the machine on one side (right side) in the left-right direction of the machine. The straw-removing transport device 12 is removable from the straw-removing frame 55, and is suspended and supported by the straw-removing frame 55 via the front stay 56 and the rear stay 57.

The straw exhaust frame 55 is formed in a frame shape, and includes a base end frame portion 71, a front frame portion 72, a rear frame portion 73, and a free end frame portion 74. One round pipe is bent to form a front frame portion 72, a rear frame portion 73, and a free end frame portion 74. The base end portion of the front frame portion 72 and the base end portion of the rear frame portion 73 are bent toward the rear side and the front side, respectively. There is a gap between the base end portion of the front frame portion 72 and the base end portion of the rear frame portion 73.

The base end frame portion 71 is provided over the base end portion of the front frame portion 72 and the base end portion of the rear frame portion 73. The base end frame portion 71 is fixed to the base end portion of the front frame portion 72 and the base end portion of the rear frame portion 73 from below. The base end frame portion 71 is formed of a square pipe.

The straw exhaust frame 55 is supported by a pair of front and rear stays 78 via a support shaft 76 so as to be swingable up and down around a swing axis Y2. The support shaft 76 is arranged on the same swing axis Y2 as the transmission shaft 38. The support shaft 76 is fixed to the stay 83. The stay 83 is fixed to the base end frame portion 71. The pair of front and rear stays 78 are bolted to the bracket 87. The bracket 87 is vertically provided on the lower surface of the front-rear frame 40R on the right side.

The straw exhaust frame 55 has a lowering position in which the straw exhausting transport device 12 conveys the straw and an ascending position in which the straw exhausting transport device 12 does not convey the straw (first ascending position and second ascending position described later). It is possible to swing up and down around the swing axis Y2. A connecting portion 60 is provided which connects the handling body frame 44 and the straw frame 55 so as to be disconnectable. In a state where the handling body frame 44 and the straw discharging frame 55 are connected by the connecting portion 60, the handling body frame 44 and the straw discharging frame 55 can be integrally swung up and down by the cylinder 45.

As the ascending limit of the straw exhaust frame 55, the first ascending position (the ascending position corresponding to the first ascending angle α shown in FIG. 15) and the second ascending position lower than the first ascending position (the second ascending position shown in FIG. 15). The rising position corresponding to the angle β) and. The first ascending position is a position where the clogging of the handling cylinder 11 can be cleared. The second ascending position is a position where the transport end side portion of the straw discharge transport device 12 does not interfere with the straw discharge cutting device 28 (see FIG. 8), and a position where clogging of the straw discharge transport device 12 can be performed. is there.

The connecting portion 60 extends over the first bracket 61 fixed to the left front-rear frame 40L, the second bracket 62 fixed to the free end frame portion 74, and the first bracket 61 and the second bracket 62. It is provided with a connecting plate 63 for connecting the above. The connecting plate 63 is bolted to the first bracket 61 and the second bracket 62, respectively.

[Inner lock mechanism for straw frame]
As shown in FIGS. 9 to 14, an inner lock mechanism 93 is provided to hold the base end side portion of the straw exhaust frame 55 on the right front-rear facing frame 40R in a state where the straw exhaust frame 55 is located in the descending position. ing. The inner lock mechanism 93 includes an inner hook 94 and an inner hook pin 95. The inner hook 94 is supported by the base end frame portion 71. The inner hook pin 95 is supported by the front-rear frame 40R on the right side.

As shown in FIG. 11, the inner hook 94 engages with the inner hook pin 95 following the swing of the straw exhaust frame 55 toward the descending position side, so that the base end side portion of the straw exhaust frame 55 is locked inside. The position is held by the mechanism 93 on the front-rear frame 40R on the right side. Then, as shown in FIG. 12, the position is held by the inner lock mechanism 93 by disengaging the inner hook 94 with the inner hook pin 95 following the swing of the straw frame 55 toward the ascending position side. Is released.

[Outer lock mechanism for handling body frame]
As shown in FIGS. 6 to 10 and 13, an outer lock mechanism 96 is provided to hold the left front-rear facing frame 40L in the rear frame 41 in a state where the handling body frame 44 is located in the lowered position. The outer locking mechanism 96 includes an outer hook 97 and an outer hook pin 98. The outer hook 97 is supported by the front-rear frame 40L on the left side. The outer hook pin 98 is supported by the rear frame 41.

A link mechanism 109 for interlocking and connecting the handle body lock mechanism 46 (rear hook plate 47) and the outer lock mechanism 96 (outer hook 97) is provided. The link mechanism 109 includes a first link arm 110, a second link arm 111, and a link rod 112. The first link arm 110 is connected to the base end portion of the hook plate 47 on the rear side so as to be relatively swingable. The first link arm 110 and the second link arm 111 are connected so as to be able to swing relative to each other. A second link arm 111 is connected to the front end of the link rod 112 so as not to swing relative to each other. An outer hook 97 is connected to the rear end of the link rod 112 so as not to swing relative to each other.

As shown in FIG. 9, the pair of front and rear hook plates 47 are swung toward the engaging side by the motor M2, so that the hook plate 47 (hook portion 47a) is engaged with the handling body hook pin 48. Then, the swing of the rear hook plate 47 to the engaging side is transmitted to the outer hook 97 via the link mechanism 109, so that the swing of the rear hook plate 47 to the engaging side is interlocked with the swing of the hook plate 47 to the engaging side. The outer hook 97 is swung toward the engaging side. In this way, when the outer hook 97 is engaged, the left front-rear frame 40L is held at the rear frame 41 by the outer lock mechanism 96.

Then, as shown in FIG. 10, the pair of front and rear hook plates 47 are swung toward the disengagement side by the motor M2, so that the hook plates 47 (hook portion 47a) are disengaged from the handling cylinder hook pin 48. To. Then, the swing of the hook plate 47 on the rear side to the disengagement side is transmitted to the outer hook 97 via the link mechanism 109, so that the hook plate 47 on the rear side swings to the disengagement side. In conjunction with this, the outer hook 97 is swung to the disengagement side. In this way, when the outer hook 97 is in the disengaged state, the position holding by the outer lock mechanism 96 is released.

[Swing structure of straw cutting device]
As shown in FIGS. 6 and 15 to 18, the straw cutting device 28 is supported by the support column 113 so as to be able to swing around the swing axis Z1. The support column 113 is provided with a pair of upper and lower support shafts 114. The support column 113 is provided with a support portion 115 that supports the support shaft 114.

On the right side of the straw cutting device 28, there is a frame 116 having a circular cross section extending in the vertical direction, a plate 117 rotatably connected to the upper support shaft 114, and a rotatable lower support shaft 114. A bracket 118, which is connected in a state, is provided. The plate 117 is fixed to the frame 116 so as to swing integrally with the frame 116 around the swing axis Z1.

An angle detection sensor 119 for detecting the swing angle around the swing axis Z1 of the straw cutting device 28 is provided. The angle detection sensor 119 is composed of a potentiometer. The angle detection sensor 119 includes a swing-type detection arm 119a. The detection arm 119a is in contact with the frame 116.

[Lock mechanism for straw cutting device]
As shown in FIGS. 6 and 15 to 18, the swing of the straw cutting device 28 from the working position to the non-working position side and the swing of the straw cutting device 28 from the non-working position to the working position side. A lock mechanism 120 is provided to regulate the above. The lock mechanism 120 can be switched between an unregulated state in which the swing of the straw cutting device 28 is not regulated and a regulated state in which the swing of the straw cutting device 28 is regulated. The locking mechanism 120 includes a plate 117 and a cam 121.

The cam 121 is supported by the shaft portion 122 so that it can swing around the swing axis X1 extending in the left-right direction of the machine body. The shaft portion 122 projects to the left from the left side portion of the upper support portion 115. The cam 121 is held out by a bolt 123 and a flat washer 124 in a state of being fitted onto the shaft portion 122.

A torsion spring 125 for swinging and urging the cam 121 toward the initial position is provided. A stopper 126 that comes into contact with the cam 121 in the initial position is provided. The torsion spring 125 is fitted onto the shaft portion 122, one end thereof is engaged with the cam 121, and the other end portion is engaged with the stopper 126. The cam 121 is held at the initial position by being oscillated toward the initial position by the torsion spring 125 and abutting against the stopper 126.

Just as the lock mechanism 120 regulates the swing of the straw cutting device 28 in conjunction with the ascent of the straw exhaust frame 55, the interlocking mechanism 127 that interlocks the regulation operation of the lock mechanism 120 with the ascending operation of the straw exhaust frame 55 is provided. Has been done. The interlocking mechanism 127 includes a cable wire 128 extending over the straw frame 55 and the cam 121. The cable wire 128 is arranged along an inclined portion 39a that is inclined so as to be located on the right side toward the rear side of the right side wall 39 of the threshing device 10. The cable wire 128 includes an inner wire 128a and an outer wire 128b. The end of the inner wire 128a on the straw frame 55 side is connected to the stay 129. The stay 129 is bolted to the stay 130. The stay 130 is bolted to the stay 83. The end of the outer wire 128b on the straw frame 55 side is supported by the stay 79. The stay 79 is bolted to the rear stay 78. The end of the inner wire 128a on the cam 121 side is connected to the cam 121. The end of the outer wire 128b on the cam 121 side is supported by the stay 131. The stay 131 is fixed to the left side portion of the upper support portion 115.

As shown in FIG. 18, in the state where the straw exhaust frame 55 is located in the lowered position, the cam 121 is held in the initial position. In the state shown in FIG. 18, the cam 121 is located below the lower surface of the plate 117 in the rotation locus of the tip 117a of the plate 117. Therefore, even if the plate 117 rotates around the swing axis Z1, it does not come into contact with the cam 121, and the swing of the straw-discharging cutting device 28 is not regulated. As described above, as shown in FIGS. 21 and 22, when the straw-removing frame 55 is located in the lowered position, the lock mechanism 120 is in the unregulated state, and the straw-removing cutting device 28 is in the working position and non-working. You can switch to the position.

Then, as shown in FIG. 19, when the straw exhaust frame 55 rises to the second ascending position, the cam 121 resists the urging force of the torsion spring 125 in conjunction with the ascending of the straw exhaust frame 55, and the cable wire. It swings upward to the position shown in FIG. 19 in the form of being pulled by 128. In the state shown in FIG. 19, the cam 121 is located below the lower surface of the plate 117 in the rotation locus of the tip 117a of the plate 117. At that time, the flat surface 121a of the cam 121 is substantially parallel to the lower surface of the plate 117. Therefore, even if the plate 117 rotates around the swing axis Z1, it does not come into contact with the cam 121, and the swing of the straw-discharging cutting device 28 is not regulated. As described above, as shown in FIGS. 21 and 23, when the straw-removing frame 55 is raised to the second rising position, the lock mechanism 120 is in the unregulated state, and the straw-removing cutting device 28 is set as the working position. You can switch to a non-working position.

Then, as shown in FIG. 20, when the straw exhaust frame 55 rises to the first ascending position, the cam 121 resists the urging force of the torsion spring 125 in conjunction with the ascending of the straw exhaust frame 55, and the cable wire. It swings upward to the position shown in FIG. 20 in the form of being pulled by 128. In the state shown in FIG. 20, the cam 121 enters the upper side of the lower surface of the plate 117 in the rotation locus of the tip 117a of the plate 117. Therefore, when the plate 117 rotates around the swing axis Z1, it comes into contact with the cam 121, and the swing of the straw-discharging cutting device 28 is restricted. As described above, as shown in FIGS. 21 and 24, when the straw-removing frame 55 is raised to the first rising position, the lock mechanism 120 is in the regulated state, and the straw-removing cutting device 28 is not set as the working position. Cannot switch to working position.

As shown in FIG. 25, when the lock mechanism 120 is switched to the regulated state while the straw cutting device 28 is located at the working position, the straw cutting device 28 can be switched from the working position to the non-working position. Can not. More specifically, as shown in FIG. 26, when the straw cutting device 28 is swung from the working position to the non-working position side while the locking mechanism 120 is in the regulated state, the plate 117 moves from the working position to the first locking position. (1) At the stage where the permissible angle θ1 swings, the first contact surface 117b of the plate 117 comes into contact with the cam 121. In this way, the first contact surface 117b of the plate 117 comes into contact with the cam 121, so that the straw cutting device 28 is prevented from further swinging toward the non-working position side.

As shown in FIG. 27, when the lock mechanism 120 is switched to the regulated state while the straw cutting device 28 is located in the non-working position, the straw cutting device 28 is switched from the non-working position to the working position. I can't. More specifically, as shown in FIG. 28, when the straw cutting device 28 is swung from the non-working position to the working position side while the locking mechanism 120 is in the regulated state, the plate 117 moves from the non-working position to the second locked position. At the stage where the second allowable angle θ2 swings, the second contact surface 117c of the plate 117 comes into contact with the cam 121. In this way, the second contact surface 117c of the plate 117 comes into contact with the cam 121, so that the straw cutting device 28 is prevented from swinging further toward the working position.

That is, as shown in FIG. 29, the locking mechanism 120 allows the straw cutting device 28 to swing from the working position to the non-working position side by a certain angle range (first allowable angle θ1) in the regulated state. In addition, the straw cutting device 28 is allowed to swing from the non-working position to the working position side by a certain angle range (second allowable angle θ2). The second permissible angle θ2 is set to an angle larger than the first permissible angle θ1.

[Control block]
As shown in FIG. 30, the control block includes a control device 132, a cylinder 45, a motor M1, a motor M2, an alarm unit 133, an elevating switch 134 for operating the cylinder 45, and a switching for operating the motor M1. The switch 135, the angle detection sensor 119 that detects the swing angle around the swing axis Z1 of the straw cutting device 28, and the angle detection sensor that detects the swing angle around the swing axis Y2 of the straw frame 55. 136 and are included.

The elevating switch 134 issues a raising command for raising the handling cylinder frame 44 and the straw exhaust frame 55 by the extension operation of the cylinder 45 and a lowering command for lowering the handling cylinder frame 44 and the straw exhausting frame 55 by the contraction operation of the cylinder 45. Emit. The elevating switch 134 includes an ascending operation unit that issues an ascending command and a descending operation unit that issues a descending command. The handling cylinder frame 44 and the straw exhausting frame 55 are raised only while the raising operation unit is being pushed, and the handling cylinder frame 44 and the straw exhausting frame 55 are lowered only while the lowering operation portion is being pushed and operated. To do.

The changeover switch 135 issues a changeover command for switching the changeover plate 31 between a cut position and a non-cutting position by the motor M1. The alarm unit 133 can be configured by, for example, an audio output device (speaker or the like) or a display device (display, beacon or the like). The control device 132 includes an elevating control unit 137, a switching control unit 138, and an alarm control unit 139.

The elevating control unit 137 controls the elevating of the cylinder 45 in response to a command from the elevating switch 134. As shown in FIGS. 31 and 33, when the elevating switch 134 issues an ascending command to elevate the straw to the first ascending position while the straw cutting device 28 is located at the working position, the elevating control unit 137 ejects the straw. Raise the straw frame 55 to the first ascending position. Similarly, as shown in FIGS. 31 and 34, when the elevating switch 134 issues an elevating command to elevate the straw to the first ascending position while the straw cutting device 28 is located in the non-working position, the elevating control unit 137 raises the straw exhaust frame 55 to the first ascending position.

However, as shown in FIGS. 31 and 35, the straw cutting device 28 is located between the working position and the non-working position (the straw cutting device 28 is neither in the working position nor in the non-working position). Even if the elevating switch 134 issues an ascending command to elevate to the first ascending position in a position (hereinafter referred to as "intermediate position"), the elevating control unit 137 still uses the straw exhaust frame 55. Do not rise to the first rising position. That is, in the state where the straw-removing cutting device 28 is located at the intermediate position, the straw-removing frame 55 is raised only to the second rising position even if the raising command for raising to the first raising position is issued by the raising / lowering switch 134. Can't.

Here, when raising the straw exhaust frame 55 to the first ascending position, the elevating control unit 137 does not raise the straw exhaust frame 55 to the first ascending position at once, but raises the straw exhaust frame 55 to the second ascending position. Pause. Then, after the temporary stop, when an ascending command for ascending to the first ascending position is issued by the elevating switch 134, the elevating control unit 137 raises the straw exhaust frame 55 from the second ascending position to the first ascending position. On the other hand, when the straw removal frame 55 is lowered from the first ascending position to the descending position, the elevating control unit 137 lowers the straw frame 55 from the first ascending position to the descending position at once.

The changeover control unit 138 controls the changeover of the motor M1 in response to a command from the changeover switch 135. As shown in FIGS. 32 and 34, when the straw cutting device 28 is located in the non-working position, the straw frame 55 is raised to either the first rising position or the second rising position. Even in this case, when the changeover switch 135 issues a changeover command, the changeover control unit 138 switches the changeover plate 31 between the cut position and the non-cut position. However, as shown in FIGS. 32 and 33, when the straw cutting device 28 is located at the working position, the straw frame 55 rises to either the first rising position or the second rising position. Even when the changeover switch 135 is issued, the changeover control unit 138 does not switch the changeover plate 31 between the cut position and the non-cut position.

The alarm control unit 139 controls the alarm of the alarm unit 133. When the straw exhaust frame 55 is temporarily stopped at the second ascending position, the alarm control unit 139 issues an alarm by the alarm unit 133 in order to notify that the suspension has been performed. When the straw discharging frame 55 is raised to the first rising position and the straw cutting device 28 is to be switched between the working position and the non-working position, the alarm control unit 139 issues an alarm by the alarm unit 133.

More specifically, as shown in FIG. 29, when the straw-removing frame 55 is raised to the first rising position, when the straw-removing cutting device 28 is swung from the working position to the non-working position side, the alarm control unit In 139, the alarm by the alarm unit 133 is issued before reaching the first lock position (between the working position and the first lock position). In a state where the straw exhaust frame 55 is raised to the first ascending position, when the straw exhaust cutting device 28 is swung from the non-working position to the working position side, the alarm control unit 139 issues a second alarm by the alarm unit 133. Perform before reaching the locked position (between the non-working position and the second locked position).

[Bracket for angle detection sensor]
As shown in FIG. 16, a bracket 140 to which the angle detection sensor 119 is attached is provided. The bracket 140 is bolted to the stay 141. The stay 141 is fixed to the lower part of the upper support portion 115. That is, the angle detection sensor 119 is provided on the upper support portion 115 that swingably supports the straw cutting device 28. The bracket 140 is provided with a stopper 140a that prevents the detection arm 119a from swinging out of the detection range from the initial position. The detection arm 119a contacts the stopper 140a at the initial position, and the stopper 140a prevents the detection arm 119a from swinging out of the detection range from the initial position.

Here, as described above, the detection arm 119a is in contact with the frame 116, but if the stopper 140a is not provided, the straw cutting device 28 is removed from the pair of upper and lower support shafts 114. Then, there is no target with which the detection arm 119a comes into contact. Then, the detection arm 119a swings out of the detection range from the initial position, and there is a concern that the straw exhaust frame 55 may be hindered from moving up and down. For example, when the detection arm 119a swings out of the detection range from the initial position and the detection value of the angle detection sensor 119 indicates the detection value in the state where the straw cutting device 28 is located at the intermediate position, the detection value is discharged. The straw frame 55 cannot be raised to the first rising position.

However, according to the above configuration, even if the straw cutting device 28 is removed from the pair of upper and lower support shafts 114, the stopper 140a remains on the machine body side, whereby the swing of the detection arm 119a is caused by the stopper 140a. Since it is blocked, the above-mentioned inconvenience can be avoided.

[Another Embodiment]
(1) In the above embodiment, a mechanical locking mechanism is adopted as the "locking mechanism" for the straw cutting device 28. For example, the straw cutting device 28 is set to a working position and a non-working position by a motor. When it is configured to be switched to, a locking mechanism by the control device 132 may be adopted as the "locking mechanism" for the straw cutting device 28.

(2) In the above embodiment, the first ascending position and the second ascending position lower than the first ascending position are set as the ascending limit of the straw exhaust frame 55, but in addition to this, the second ascending position is set. An ascending position lower than the ascending position, or an ascending position lower than the first ascending position and higher than the second ascending position may be set.

(3) In the above embodiment, when the straw exhaust frame 55 is raised to the first ascending position, the straw exhaust frame 55 is configured to pause at the second ascending position, but the straw exhaust frame 55 is the first. It may be configured to ascend to one ascending position at once.

(4) In the above embodiment, when the straw exhaust frame 55 is lowered from the first ascending position to the descending position, the straw exhaust frame 55 is configured to descend from the first ascending position to the descending position at once. The straw exhaust frame 55 may be configured to pause at the second ascending position.

(5) In the above embodiment, the locking mechanism 120 allows the straw cutting device 28 to swing from the working position to the non-working position side by a certain angle range (first allowable angle θ1) in the regulated state. In addition, the straw cutting device 28 is allowed to swing from the non-working position to the working position side by a certain angle range (second allowable angle θ2). However, the lock mechanism 120 allows the straw cutting device 28 to swing from the working position to the non-working position side by a certain angle range under the regulated state, and the straw cutting device 28 works from the non-working position. It is not necessary to allow swinging to the position side by a certain angle range. Alternatively, the lock mechanism 120 does not allow the straw cutting device 28 to swing from the working position to the non-working position side by a certain angle range under the regulated state, and the straw cutting device 28 does not allow the straw cutting device 28 to swing from the non-working position. It may be allowed to swing to the working position side by a certain angle range. Alternatively, the lock mechanism 120 does not allow the straw cutting device 28 to swing from the working position to the non-working position side by a certain angle range under the regulated state, and the straw cutting device 28 does not allow the straw cutting device 28 to swing from the non-working position. It is not necessary to allow the working position side to swing by a certain angle range.

The present invention can be used for combine harvesters (for example, head-feeding combine harvesters).

9 Feed chain 10 Threshing device 11 Handling body 12 Straw transport device 28 Straw cutting device 29 Cutter 30a Input port 31 Switching plate 55 Straw frame Y2 Swing axis Z1 Swing axis

Claims (6)

A feed chain that holds and transports harvested culms,
A threshing device having a handling cylinder and threshing the harvested culm conveyed by the feed chain,
A straw transporting device that is connected to the rear side of the threshing device, receives the straw after the threshing process from the feed chain, and sandwiches and transports the straw to the rear.
A combine that is provided below the transport end side portion of the straw transport device and is provided with a straw cutting device that cuts the straw transported by the straw transport device.
The straw cutting device has a working position located below a transport end side portion of the straw transport device and a transport end of the straw transport device around a swing axis extending in the vertical direction on the left and right one end side. It can swing over a non-working position located away from below the side part,
The straw transporting device is supported in a state of being inclined so as to be located on one side in the left-right direction of the machine toward the end side of the transporting of the straw-exhausting transport device in a plan view, and extends in the front-rear direction of the machine on the one side in the left-right direction of the machine. Equipped with a straw frame that can swing up and down around the swing axis,
At least a first ascending position and a second ascending position lower than the first ascending position are set as the ascending limit of the straw exhaust frame.
In the state where the straw cutting device is located at the working position and the state where the straw cutting device is located at the non-working position, the straw frame is raised to the first rising position, respectively. It is possible and
A combine capable of raising the straw-removing frame to the second ascending position when the straw-removing device is located between the working position and the non-working position. The combine according to claim 1, wherein the second ascending position is a position where the transport end side portion of the straw transport device does not interfere with the straw cutting device. The combine according to claim 1 or 2, wherein the second ascending position is a position where the clogging of the straw transporting device can be cleared. The straw cutting device includes a cutter that cuts straw, an inlet that is located above the cutter and into which straw is injected, a cutting position that opens the inlet, and a non-cutting position that closes the inlet. With a switching plate that can be switched to,
In the state where the straw cutting device is located at the working position, the switching plate can be raised regardless of whether the straw frame is raised to the first rising position or the second rising position. The combine according to any one of claims 1 to 3, wherein the cutting position and the non-cutting position cannot be switched. The straw cutting device includes a cutter that cuts straw, an inlet that is located above the cutter and into which straw is injected, a cutting position that opens the inlet, and a non-cutting position that closes the inlet. With a switching plate that can be switched to,
In the state where the straw cutting device is located in the non-working position, the switching plate can be operated regardless of whether the straw frame is raised to the first rising position or the second rising position. The combine according to any one of claims 1 to 4, which can switch between the cutting position and the non-cutting position. The combine according to any one of claims 1 to 5, wherein the straw frame is configured to pause at the second ascending position when the straw frame is raised to the first ascending position. ..

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