JP2020054241A - Harvester - Google Patents

Abstract

To provide a harvester which inhibits waste straws and hands/legs of an operator from being brought into contact with an exhaust pipe.SOLUTION: A harvester includes: a harvesting unit provided in the front part of a machine body for harvesting crops of a farm field; a feeder provided at one side part of the machine body for conveying crops harvested by the harvesting unit; an operation unit 3 provided at the other side part of the machine body; an exhaust treatment device 13 provided below the operation unit 3 for treating exhaust gas of an engine 5; and an exhaust pipe A for discharging exhaust gas from the exhaust treatment device 13. The exhaust pipe A extends from the exhaust treatment device 13 to the feeder, bends backward, and extends backward between the feeder and the operation unit 3. The harvester is provided with a bending part cover 30 for covering, from above, a first exhaust pipe part 17, which is a bending part of the exhaust pipe A backward.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a harvester provided with an exhaust pipe for exhausting exhaust gas from an exhaust treatment device.

  For example, in Patent Literature 1, an exhaust treatment device that purifies exhaust gas from an engine is provided in a state that is located on a rear side of a body of an operation unit, and an exhaust pipe that discharges exhaust gas from the exhaust treatment device to the outside is provided. There is described a combine extending between a threshing device and a grain tank in a rearwardly inclined position, and configured to discharge exhaust gas upward from the threshing device.

JP-A-2006-168022

  Since the high temperature exhaust gas from the exhaust treatment device flows through the exhaust pipe and becomes high in temperature, it is necessary to suppress contact with straw chips and the driver's limbs. Here, the arrangement of the exhaust pipe is determined by the arrangement of the exhaust treatment device and the operation unit, the harvesting unit, the transport unit, and the like. 2. Description of the Related Art In recent years, harvesters such as combine harvesters have been demanded to improve the work efficiency by increasing the size of a crop processing device such as a threshing device mounted on the body. Along with this, the space in which the exhaust pipe can be arranged has become narrower, and it has become difficult to suppress the above-mentioned contact with the scraps and the driver's limbs.

  In view of the above-described circumstances, an object of the present invention is to provide a harvester in which contact between a waste chip and a driver's limbs and an exhaust pipe is suppressed.

  The harvester of the present invention is provided at the front of the body, a harvesting unit that harvests crops in the field, and a transport unit that is provided on one side of the body and transports the crops that the harvesting unit harvests, An operating unit provided on the other side of the body, an exhaust processing device provided below the operating unit, configured to process exhaust gas from an engine, and an exhaust pipe configured to discharge exhaust gas from the exhaust processing device, The exhaust pipe extends from the exhaust treatment device toward the transport section, bends backward, extends rearward between the transport section and the operating section, and extends rearward of the exhaust pipe. A bend cover is provided to cover the bend from above.

  When the exhaust gas treatment device is provided below the operation unit and the exhaust pipe extends from the exhaust gas treatment device toward the transport unit, the exhaust pipe passes near the operation unit. According to this characteristic configuration, since the bent portion cover is provided, the contact between the driver's limbs and the exhaust pipe can be suppressed. In addition, it is possible to suppress the contact between the waste chips falling from above and the exhaust pipe.

  In the present invention, it is preferable that the upper surface of the bent portion cover is inclined.

  According to this configuration, it is possible to suppress that the waste chips falling from above are deposited on the upper surface of the bent portion cover.

  In the present invention, it is preferable that a horizontal cover portion is provided at a portion of the bent portion cover on the side of the transport portion, and the horizontal cover portion extends to a lower side than a lower end of the bent portion.

  According to this configuration, contact between the driver's limbs and the exhaust pipe can be reliably suppressed.

  In the present invention, a threshing device that is provided on the rear side of the transport unit and threshes a crop harvested by the harvesting unit, and a connection frame that connects the operation unit and the threshing device, is provided. Preferably, the bent portion cover is supported by the connection frame.

  According to this configuration, the bent portion cover can be reliably supported.

  In the present invention, an exhaust treatment device cover supported by the operating unit and covering the exhaust treatment device from the transfer unit side is provided, and the exhaust pipe is provided through the exhaust treatment device cover, It is preferable that the bent portion cover is supported by the exhaust treatment device cover.

  According to this configuration, the bent portion cover can be more reliably supported.

  In the present invention, a gap that allows air to flow in from the outside of the exhaust pipe to the inside is formed in a portion of the exhaust pipe downstream of the bent section, and the bent section cover is disposed in front of the gap. Is preferred.

  According to this configuration, the exhaust gas can be cooled by the air flowing from the gap. And since a bending part cover is arrange | positioned in front of a clearance gap, the invasion of straw chips into a clearance gap can be suppressed and cooling by a clearance gap is not obstructed, and it is preferable.

It is a right view which shows the whole combine. It is a top view which shows the whole combine. It is a top view which shows an exhaust pipe and a bending part cover. It is a left view which shows an exhaust pipe and a bending part cover. It is a perspective view which shows an exhaust pipe and a bent part cover. It is a left side sectional view showing a clutch change lever. It is a top view showing a clutch change lever. FIG. 5 is a rear sectional view showing a clutch switching lever. It is a top view showing a front panel. It is a left view which shows the support structure of a brake sensor.

  Hereinafter, an embodiment which is an example of the present invention will be described with reference to the drawings. In the following description, the direction of the arrow F shown in FIGS. 1 and 2 is “forward”, the direction of the arrow B is “rearward”, and the arrow U shown in FIG. Are defined as “upper body”, the direction of arrow D is “lower body”, the direction of arrow L shown in FIG. 2 and the like is “left of aircraft”, and the direction of arrow R is “right of aircraft”.

[Overall configuration of ordinary combine]
As shown in FIGS. 1 and 2, a normal-type combine body includes a frame-shaped body frame 1 configured by combining bar-shaped frame members and the like, and left and right mounted on a lower portion of the body frame 1. A pair of crawler type traveling devices 2 is provided. An operation unit 3 is provided on one lateral side (right side) of the fuselage. The boarding space of the driving unit 3 is covered by the cabin 4. An engine room 6 having an engine 5 is provided below the driving section 3. A cutting unit 7 (corresponding to a “harvesting unit”) that cuts and harvests planted grain culms such as rice and wheat as field crops is provided at the front of the machine so as to be able to move up and down. A threshing device 8 and a grain tank 9 are provided at a rear portion of the body frame 1. The threshing device 8 and the grain tank 9 are provided side by side in the width direction of the machine body. A feeder 10 (corresponding to a “transport unit”) is provided on one lateral side (left side) of the machine body, extending over the reaping unit 7 and the threshing device 8. The whole of the stalks harvested by the reaper 7 from the root to the tip is supplied to the threshing device 8 by the feeder 10 and is threshed in the threshing device 8. The threshing device 8 is provided behind the feeder 10. Between the threshing device 8 and the grain tank 9, a lifting device is provided upright. The grain raising device is connected to a grain discharge unit formed at a lower part of the threshing device 8 and a grain supply unit formed at an upper part of the grain tank 9. The grain obtained by the threshing device 8 is supplied to the grain tank 9 by the frying device and stored in the grain tank 9.

  A grain discharging device 12 for discharging the grains in the grain tank 9 to the outside is provided. The grain discharge device 12 includes a vertical transport unit that transports the grains in the grain tank 9 upward, and a horizontal transport unit that transports the grains from the vertical transport unit to the outside of the machine. Have been.

  As shown in FIGS. 1 and 2, the engine 5 is provided on the front side of the grain tank 9. An exhaust processing device 13 that purifies exhaust gas from the engine 5 is provided in a portion of the engine room 6 that is located above the engine 5. In the exhaust treatment device 13, exhaust gas of the engine 5 is introduced, and diesel particulates contained in the introduced exhaust gas are collected by a collection filter (not shown), and exhaust gas purification processing for reducing diesel particulates is performed. Will be

〔Exhaust pipe〕
As shown in FIGS. 1 and 2, the exhaust pipe A is connected to the exhaust processing device 13. The exhaust pipe A extends from the exhaust processing device 13 toward the feeder 10 (leftward), bends rearward, and extends rearward between the feeder 10 and the operating unit 3. The exhaust port 25 of the exhaust pipe A is open at the rear of the fuselage.

  The exhaust pipe A includes a first exhaust pipe portion 17 (corresponding to a “bent portion”), a second exhaust pipe portion 18, and a third exhaust pipe portion 19.

  The first exhaust pipe section 17 is arranged between the operating section 3 and the threshing device 8 as shown in FIGS. The first exhaust pipe section 17 has an upstream side connected to the exhaust processing device 13 and a downstream side connected to the second exhaust pipe section 18. The first exhaust pipe portion 17 extends horizontally from the connection portion with the exhaust treatment device 13 toward the feeder 10 (leftward), and then bends backward while bending upward. The first exhaust pipe section 17 is bent rearward at an angle of 90 ° when viewed from above.

  As shown in FIG. 2, the second exhaust pipe portion 18 has a front portion disposed between the operating portion 3 and the threshing device 8 and a rear portion disposed between the grain tank 9 and the threshing device 8. Have been. The second exhaust pipe section 18 has an upstream side connected to the first exhaust pipe section 17 and a downstream side connected to the second exhaust pipe section 18. The second exhaust pipe section 18 extends obliquely rearward and upward from the connection portion with the first exhaust pipe section 17, and subsequently horizontally extends rearward. The downstream portion, that is, the rear portion of the second exhaust pipe portion 18 is configured as a double pipe having an inner pipe and an outer pipe fitted to the inner pipe.

  As shown in FIG. 2, the third exhaust pipe portion 19 has a front portion disposed between the grain tank 9 and the threshing device 8 and a rear portion protruding rearward from the machine body. The third exhaust pipe section 19 has an upstream side connected to the second exhaust pipe section 18 and an open end on the downstream side. The third exhaust pipe section 19 extends horizontally rearward from a connection portion with the second exhaust pipe section 18, and then extends obliquely rearward and upward while increasing the diameter. The upstream portion of the third exhaust pipe portion 19, that is, the front portion is configured as a double pipe having an inner pipe and an outer pipe that fits over the inner pipe.

  As shown in FIGS. 4 and 5, the first exhaust pipe portion 17 and the second exhaust pipe portion 18 are configured such that a front end of the second exhaust pipe portion 18 is fitted to a rear end of the first exhaust pipe portion 17, In addition, they are connected in a state where a gap S1 is formed between the rear end of the first exhaust pipe section 17 and the front end of the second exhaust pipe section 18. When the exhaust gas from the exhaust processing device 13 flows into the second exhaust pipe portion 18 through the first exhaust pipe portion 17, air outside the exhaust pipe A passes through the gap S1 and passes through the second exhaust pipe portion by the ejector effect due to the flow of the exhaust gas. It is drawn into the exhaust pipe section 18. By mixing the drawn air, the exhaust inside the second exhaust pipe 18 is cooled. In other words, a gap S1 for allowing air to flow in from the outside of the exhaust pipe A to the inside thereof is formed in a portion of the exhaust pipe A on the downstream side of the first exhaust pipe section 17, and the gap S1 provides a cooling section for the exhaust gas using the ejector effect. Is configured.

  As shown in FIG. 5, the second exhaust pipe section 18 and the third exhaust pipe section 19 are configured such that the front end of the third exhaust pipe section 19 is fitted to the rear end of the second exhaust pipe section 18 and The second exhaust pipe section 18 is connected to a front end of the third exhaust pipe section 19 in a state where a gap S2 is formed between the rear end and the third exhaust pipe section 19. When the exhaust gas from the exhaust processing device 13 flows into the third exhaust pipe portion 19 through the second exhaust pipe portion 18, air outside the exhaust pipe A passes through the gap S2 to the third exhaust pipe due to an ejector effect caused by the flow of the exhaust gas. It is drawn into the exhaust pipe section 19. The exhaust inside the third exhaust pipe 19 is cooled by mixing the drawn air. In other words, a gap S2 that allows air to flow from the outside of the exhaust pipe A to the inside is formed at a portion of the exhaust pipe A on the downstream side of the second exhaust pipe section 18, and the gap S1 is used to cool the exhaust gas using the ejector effect. Is configured.

[Bent section cover]
As shown in FIG. 3, a bent cover 30 that covers the first exhaust pipe 17 from above is provided between the operating unit 3 and the threshing device 8. In other words, the bent portion cover 30 is disposed in front of and above the first exhaust pipe portion 17. That is, the bent portion cover 30 is disposed in front of the gap S1. As shown in FIGS. 3, 4, and 5, the bent portion cover 30 includes an upper surface portion 30a, a lateral cover portion 30b, and a stay portion 30c.

  The upper surface portion 30a is a front portion of the bent portion cover 30. The upper surface portion 30a is a rectangular flat plate-shaped portion, and is inclined forward and rightward with respect to a horizontal plane. In other words, the upper surface portion 30a is arranged in such a manner that its normal line is directed obliquely rightward and obliquely upward.

  The horizontal cover portion 30b is a portion on the feeder 10 side (left side) of the bent portion cover 30, and is connected to a left side of the upper surface portion 30a. The horizontal cover portion 30b is a triangular plate-shaped portion, and is inclined rightward and forward with respect to a vertical plane parallel to the front-rear direction. In other words, the horizontal cover portion 30b is disposed in a posture in which the normal line is directed diagonally left and forward. As shown in FIG. 4, the lower end of the horizontal cover portion 30 b is located lower than the lower end of the first exhaust pipe portion 17. In other words, the horizontal cover portion 30b extends below the lower end of the first exhaust pipe portion 17.

  The stay 30c is an upper portion of the bent cover 30 and is connected to an upper side of the upper surface 30a. The stay portion 30c is a substantially rectangular flat plate-shaped portion, and is inclined leftward and forward with respect to a vertical plane parallel to the front-rear direction. In other words, the stay 30c is arranged in a posture in which the normal line is directed obliquely rightward and forward.

  As shown in FIGS. 3, 4 and 5, the bent portion cover 30 is supported by the connection frame 40 and the exhaust treatment device cover 50.

  The connection frame 40 is a frame that connects the operation unit 3 and the threshing device 8. As shown in FIG. 3, the right end of the connection frame 40 is connected to the left rear frame 3 a of the driving unit 3. The left end of the connection frame 40 is connected to the right front frame 8 a of the threshing device 8. The support of the bent portion cover 30 by the connecting frame 40 is realized by attaching the stay portion 30 c of the bent portion cover 30 to the front surface of the connecting frame 40.

  The exhaust treatment device cover 50 shown in FIGS. 4 and 5 is a cover that is supported by the driving unit 3 and covers the exhaust treatment device 13 from the feeder 10 side (left side). Specifically, the exhaust treatment device cover 50 is supported by the left-side frames 3b, 3c, and 3d of the operation unit 3. The exhaust treatment device cover 50 is disposed on the left side of the operation unit 3 and covers the upper left portion of the engine room 6.

  The exhaust treatment device cover 50 is a rectangular plate-shaped member, and is disposed on a plane extending in the up-down direction and the front-back direction. In other words, the exhaust treatment device cover 50 is arranged in a posture in which the normal line is directed in the left-right direction.

  As shown in FIG. 4, the support of the bent portion cover 30 by the exhaust treatment device cover 50 is such that the lower end of the upper surface portion 30a of the bent portion cover 30 is attached to a stay 50a provided on the exhaust treatment device cover 50. Has been realized.

  As shown in FIG. 4, the exhaust treatment device cover 50 has a notch 50b at the rear end. The first exhaust pipe portion 17 extends from the inside of the engine room 6 to the outside through the cutout portion 50b. In other words, the first exhaust pipe section 17 is provided to penetrate the exhaust processing device cover 50.

[Clutch switching lever]
The driving section 3 is provided with a clutch switching lever 81. As shown in FIGS. 6 to 8, the clutch switching lever 81 is a lever that swings back and forth, and is a single lever that switches both the cutting clutch and the threshing clutch between the on state and the off state. . The clutch switching lever 81 is configured to be changeable between a first operation position O1, a second operation position O2, and a third operation position O3. The first operation position O1 is an operation position where both the mowing clutch and the threshing clutch are in the on state. The second operation position O2 is an operation position where the cutting clutch is turned off and the threshing clutch is turned on. The third operation position O3 is an operation position where both the mowing clutch and the threshing clutch are in the off state. The clutch switching lever 81 is provided behind the main transmission lever.

  The clutch switching lever 81 is configured to be able to swing back and forth around a swing axis X1 extending in the lateral direction of the machine. The clutch switching lever 81 includes a grip 91, a grip-side lever body 92, a support-side lever body 93, and a lever support shaft 94. The grip side lever body 92 is connected to the support shaft side lever body 93 by a hinge 95 with a spring (not shown) so as to be able to swing left and right. The spring urges the grip-side lever body 92 to the left. The grip-side lever body 92 is provided with a stopper 92a that abuts on the support-side lever body 93 to limit the leftward swing of the grip-side lever body 92.

(Swinging support)
A swing support portion 96 for swingably supporting the clutch switching lever 81 around the swing axis X1 is provided. A position detection sensor 82 is also supported by the swing support portion 96. The swing support portion 96 is placed and supported on the upper surface of the top plate 67 inside the side panel 59.
The swing support portion 96 is formed of a substantially L-shaped plate. The swing support portion 96 includes a base portion 97 along the top plate 67 and a vertical wall portion 98 perpendicular or substantially perpendicular to the top plate 67. The base 97 is fixed to the top plate 67 by bolts 99. The vertical wall portion 98 is provided with a boss portion 100 through which the lever support shaft 94 is inserted. On the left side of the vertical wall portion 98, an attachment portion 101 to which the position detection sensor 82 is attached is provided.

[Guide section]
A lever guide 103 having a guide portion 102 for guiding the clutch switching lever 81 is provided. The lever guide 103 is provided so as to straddle the swing support portion 96 left and right. Leg portions 103a are formed on both left and right end portions of the lever guide 103, respectively. The leg 103a is fixed to the top plate 67 with a bolt 104. The guide portion 102 is provided in a portion of the lever guide 103 located above the swing support portion 96.

The guide part 102 includes a straight part 102a and a entering part 102b.
The linear portion 102a extends linearly in the swing operation direction (front-back direction) of the clutch switching lever 81. In the straight portion 102a, the width B2 of the section on the first operation position O1 side is smaller than the width B1 of the section between the second operation position O2 and the third operation position O3.

  The entry portion 102b has a shape that enters the direction (leftward) intersecting with the swing operation direction of the clutch switching lever 81 in a state of being connected to the linear portion 102a. The entry portions 102b are provided at a position corresponding to the first operation position O1, a position corresponding to the second operation position O2, and a position corresponding to the third operation position O3, respectively. When the grip-side lever body 92 enters the entry portion 102b and is urged by the spring to swing into the entry portion 102b, the clutch switching lever 81 is held at each operation position.

  As described above, the clutch switching lever 81 is a lever of the forward / backward swing operation type, and is configured to be able to perform the forward / backward swing operation along the linear portion 102a after the preliminary operation is performed. More specifically, the clutch switching lever 81 is moved along the linear portion 102a after the operation of causing the grip-side lever body 92 to escape from the entry portion 102b against the urging force of the spring as the preliminary operation. It is configured to be able to swing back and forth. Thus, in the state where the clutch switching lever 81 is held at the respective operation positions, the clutch switching lever 81 cannot be operated to swing back and forth along the linear portion 102a, but the grip-side lever body 92 is moved by the spring. By swinging to the right against the urging force to escape from the entrance portion 102b, the clutch switching lever 81 can be swingably operated back and forth along the linear portion 102a.

  Here, when the clutch switching lever 81 is to be switched from the third operation position O3 to the first operation position O1 in a state where the grip-side lever body 92 is swung rightward, the grip-side lever body 92 is moved to the guide portion. The clutch switching lever 81 is prevented from swinging forward by contacting the end portion 102c of the clutch 102. Therefore, in order to release the contact with the end portion 102c of the guide portion 102, it is necessary to slightly swing the grip side lever body 92 to the left and then swing the clutch switching lever 81 to the front side. is there.

〔front panel〕
As shown in FIG. 9, a front panel 55 is provided at a front portion of the driving unit 3. On the front panel 55, a steering lever 56, a DPF panel 57, and a meter panel 58 are provided in order from the right. The steering lever 61 receives operations such as a steering operation of the traveling machine body and a lifting operation of the reaper 7. The DPF panel 57 displays a regeneration state of the exhaust treatment device 13 and receives an operation related to a regeneration operation. The meter panel 58 displays a running vehicle speed, an engine speed, an engine load, a remaining fuel amount, and the like. The DPF panel 57 is provided at a central portion of the front panel 55. The meter panel 58 is provided on the left side of the front panel 55.

[Fixing the side panel to the top plate]
As shown in FIG. 8, the side panel 59 is fixed to the upper surface of the top plate 67. To fix the side panel 59 to the top plate 67, a claw 59a provided at a lower end portion of the side panel 59 is inserted into a hole 67a formed on an upper surface of the top plate 67, and an upper surface of the claw 59a is This is realized by being hooked on the lower surface. The fixing of the front panel 55 to the top plate 67 is also realized in the same manner as the fixing of the side panel 59 to the top plate 67.

[Brake sensor support structure]
As shown in FIG. 10, the brake sensor 110 is supported by the stay 113. The stay 113 is detachably attached to the frame 111 of the operation unit 3 by a bolt 112. The brake sensor 110 detects an operation state of a parking brake pedal 3e provided in the driving unit 3. More specifically, when the member 115 attached to the shaft member 114 that rotates in conjunction with the parking brake pedal 3e pushes the tip of the brake sensor 110, it is detected that the parking brake pedal 3e is depressed. In the present embodiment, since the brake sensor 110 is supported by the stay 113 that can be attached to and detached from the frame 111, the stay 113 can be removed from the frame 111 and the brake sensor 110 can be easily adjusted.

[Another embodiment]
(1) In the above embodiment, the example in which the bent portion cover 30 covers the first exhaust pipe portion 17 from above has been described. The bend cover 30 may cover the first exhaust pipe section 17 from both above and below.

(2) In the above-described embodiment, an example has been described in which the upper surface portion 30a of the bent portion cover 30 is inclined forward and rightward with respect to the horizontal plane. The upper surface 30a may be inclined in another direction. For example, the upper surface 30a may be inclined forward with respect to the horizontal plane. In other words, the upper surface portion 30a may be arranged in a posture in which the normal line is directed obliquely upward and forward.

(3) In the above embodiment, an example in which the bent portion cover 30 is supported by the connection frame 40 and the exhaust treatment device cover 50 has been described. The bend cover 30 may be supported by another member.

(4) In the above embodiment, the example in which the exhaust pipe A is configured by three members (the first exhaust pipe section 17, the second exhaust pipe section 18, and the third exhaust pipe section 19) has been described. The exhaust pipe A may be composed of one member, two members, or four or more members.

(5) In the above-described embodiment, an example has been described in which the first exhaust pipe portion 17 is bent rearward at an angle of 90 ° when viewed from above. The angle at which the first exhaust pipe section 17 bends backward may be less than 90 ° or greater than 90 °.

  INDUSTRIAL APPLICABILITY The present invention is applicable to a harvester that harvests crops to be planted while traveling, and is applicable to a self-removable combine, a corn harvester, and the like, in addition to a normal combine.

3: Operating unit 5: Engine 7: Harvesting unit (harvesting unit)
8: Threshing device 10: Feeder (transport unit)
13: Exhaust treatment device 17: First exhaust pipe section (bent section)
30: bent portion cover 30a: upper surface portion 30b: lateral cover portion 40: connecting frame 50: exhaust treatment device cover A: exhaust pipe S1: gap

Claims (6)

A harvesting unit that is provided at a front part of the fuselage and harvests crops in a field;
A transport unit that is provided on one side of the body and transports crops harvested by the harvesting unit,
A driving unit provided on the other side of the body,
An exhaust treatment device that is provided below the operation unit and treats exhaust gas of the engine;
An exhaust pipe for exhausting exhaust gas from the exhaust processing device,
The exhaust pipe extends from the exhaust treatment device toward the transport unit, bends backward, and extends rearward between the transport unit and the operating unit,
A harvester provided with a bent portion cover that covers a backward bent portion of the exhaust pipe from above.   The harvester according to claim 1, wherein an upper surface portion of the bent portion cover is inclined. A lateral cover portion is provided at a portion of the bent portion cover on the side of the transport portion,
The harvester according to claim 1, wherein the lateral cover portion extends to a lower side than a lower end of the bent portion. A threshing device that is provided on the rear side of the transport unit and thresh-processes the harvested product harvested by the harvesting unit,
A connection frame that connects the operation unit and the threshing device,
The harvester according to any one of claims 1 to 3, wherein the bent cover is supported by the connection frame. An exhaust treatment device cover supported by the driving unit and covering the exhaust treatment device from the transfer unit side is provided,
The exhaust pipe is provided through the exhaust processing device cover,
The harvester according to claim 1, wherein the bent portion cover is supported by the exhaust treatment device cover.   A gap that allows air to flow in from the outside of the exhaust pipe to the inside thereof is formed in a portion of the exhaust pipe downstream of the bent portion, and the bent portion cover is disposed in front of the gap. 7. The harvester according to any one of 6.

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