JP7134134B2 - combine - Google Patents

Description

The present invention comprises a threshing device for threshing harvested culms, a grain storage unit provided side by side with the threshing device for storing grains after threshing, and an exhaust purification device for purifying exhaust gas from an engine. The present invention relates to a combine harvester provided with an exhaust pipe for discharging exhaust after purification treatment by an exhaust purification device.

As the above combine, for example, the combine described in Patent Document 1 is already known. Patent Document 1 discloses a threshing device for threshing harvested culms (“threshing device [19]” in the document) and a grain storage unit ( “Grain tank [20]” in the literature), an exhaust purification device (“exhaust treatment device [33]” in the literature) that purifies the exhaust of the engine (“Diesel engine [15]” in the literature), and exhaust purification A combine harvester is disclosed which is provided with an exhaust pipe (“connected exhaust pipe [61]” in the document) for discharging exhaust after purification treatment by the device. The exhaust pipe is arranged between the left and right crawler traveling devices and extends rearward from the exhaust purification device.

JP 2014-97037 A

In the combine disclosed in Patent Literature 1, since the exhaust pipe is located in the lower part of the machine body, straw scraps and the like are likely to accumulate in the exhaust pipe.

In view of the above situation, there is a demand for a combine harvester in which straw scraps and the like are less likely to accumulate in the exhaust pipe.

The features of the present invention are: a threshing device for threshing harvested culms; a grain storage unit provided side by side with the threshing device for storing grains after threshing; It is passed between the device, the threshing device and the grain storage part in plan view, and extends to a position higher than the top plate of the threshing device in a state of being inclined rearward and upward, and is purified by the exhaust gas purification device. An exhaust pipe for discharging subsequent exhaust and an exhaust pipe cover covering the exhaust pipe from above are provided, the exhaust pipe is supported by the threshing device, and the exhaust pipe cover is attached to the exhaust pipe The exhaust pipe cover is supported and covers the exhaust pipe so as to surround the exhaust pipe on one side in the width direction and above, and on the other side in the width direction of the exhaust pipe. The part on the one side in the width direction of the exhaust pipe cover that covers the part located higher than the threshing device is provided so as to extend over the top plate and the position higher than the exhaust pipe when viewed from the side. There is

According to this characteristic configuration, since the exhaust pipe is covered from above by the exhaust pipe cover, it is difficult for dust and the like to accumulate on the exhaust pipe. In addition, by assembling the exhaust pipe together with the exhaust pipe cover into the threshing device in a state where the exhaust pipe cover is assembled to the exhaust pipe (a state in which the exhaust pipe and the exhaust pipe cover are unitized), the assembly work is facilitated. It can be carried out.

Further, in the present invention, the exhaust pipe is divided into a plurality of exhaust pipe members in the exhaust flow direction, and the exhaust pipe cover is divided into a plurality of cover bodies in the exhaust flow direction corresponding to the plurality of exhaust pipe members. It is preferable that

According to this characteristic configuration, each exhaust pipe member is put together with each cover body in a state in which each cover body is assembled to each exhaust pipe member (a state in which each exhaust pipe member and each cover body are unitized), and the threshing device As compared with the case where the entire exhaust pipe and the exhaust pipe cover are assembled together in the threshing apparatus, the unit becomes smaller, so that the assembling work can be performed more easily.

Further, in the present invention, in the plurality of exhaust pipe members, the exhaust downstream end portion of the exhaust pipe member on the exhaust upstream side and the exhaust upstream end portion of the exhaust pipe member on the exhaust downstream side overlap with each other with a gap therebetween, and In the plurality of cover bodies, it is preferable that the exhaust downstream end portion of the cover body on the exhaust upstream side and the exhaust upstream end portion of the cover body on the exhaust downstream side overlap with each other with a gap.

According to this characteristic configuration, the outside air can be introduced into the exhaust pipe through the gap between the exhaust pipe members and the gap between the cover bodies to cool the exhaust gas in the exhaust pipe. In addition, due to the overlapping of the exhaust pipe members and the overlapping of the cover bodies, it is difficult for straw dust and the like to enter the exhaust pipe and the exhaust pipe cover, and hot air is difficult to leak to the outside.

Further, in the present invention, the exhaust upstream end portion of the exhaust downstream side exhaust pipe member overlaps the exhaust downstream end portion of the exhaust upstream side exhaust pipe member from the outside, and the exhaust downstream side cover It is preferable that the exhaust upstream end portion of the body overlaps the exhaust downstream end portion of the cover body on the exhaust upstream side from the outside.

According to this characteristic configuration, the gap between the exhaust pipe members and the gap between the covers are opened forward. As a result, the outside air flowing from the front of the vehicle body can be efficiently introduced through the gaps between the exhaust pipe members and the gaps between the covers.

Further, in the present invention, it is preferable that a closing member is provided for closing a gap between an exhaust downstream end portion of the cover body on the exhaust upstream side and an exhaust upstream end portion of the cover body on the exhaust downstream side. is.

According to this characteristic structure, since the gap between the cover bodies is closed by the closing member, it becomes difficult for dust and the like to enter the exhaust pipe cover.

Furthermore, in the present invention, it is preferable that the closing member is a packing sandwiched between the cover body on the exhaust upstream side and the cover body on the exhaust downstream side.

According to this characteristic configuration, since the gap between the cover bodies is closed by the packing, it is possible to effectively suppress the intrusion of straw waste and the like into the exhaust pipe cover.

Further, in the present invention, a sub cover is provided that covers from above an exhaust upstream end of an exhaust pipe member positioned most upstream of the exhaust pipe members among the plurality of exhaust pipe members. It is preferable that a closing member for closing a gap between the exhaust upstream end of the cover body located on the exhaust upstream side and the sub cover is provided.

According to this characteristic structure, since the gap between the cover body and the sub-cover is closed by the closing member, it is difficult for straw dust or the like to enter the inside of the exhaust pipe cover and the sub-cover.

Furthermore, in the present invention, it is preferable that the blocking member is a plate-like member that covers the gap between the cover body and the sub-cover from the exhaust downstream side.

According to this characteristic configuration, since the gap between the cover body and the sub-cover is closed by the plate-like member, it is possible to effectively suppress the intrusion of straw waste and the like into the exhaust pipe cover.

Furthermore, in the present invention, it is preferable that an exhaust pipe member located on the exhaust downstream side among the plurality of exhaust pipe members has a smaller inclination angle with respect to the horizontal plane.

According to this characteristic configuration, the exhaust pipe is extended to the upper part of the fuselage as much as possible in order to prevent straw waste from accumulating in the exhaust pipe and to efficiently cool the exhaust gas in the exhaust pipe. It is possible to prevent the height position of the exhaust downstream portion from becoming too high.

Further, in the present invention, the exhaust pipe member located most upstream of the exhaust pipe members among the plurality of exhaust pipe members and the cover body located most upstream of the exhaust gas among the plurality of cover bodies are located above the threshing device. It preferably extends rearwardly to a position.

According to this characteristic configuration, the exhaust pipe and the exhaust pipe cover are positioned as high as possible from the front side position in the aircraft body. As a result, it is even more difficult for straw dust and the like to accumulate in the exhaust pipe, and the exhaust gas in the exhaust pipe can be cooled more efficiently.

Furthermore, in the present invention, it is preferable that the exhaust pipe cover is positioned below the upper end of the grain storage section.

According to this characteristic configuration, the height position of the exhaust pipe cover is prevented from becoming too high, and when the combine harvester is stored in a barn or the like, the exhaust pipe cover can be prevented from coming into contact with the upper part of the barn.

Furthermore, in the present invention, a grain discharge device for discharging grains in the grain storage unit to the outside is provided, and the grain discharge device is connected to the rear lower part of the grain storage unit and extends in the longitudinal direction. A vertical conveying portion and a horizontal conveying portion extending in a horizontal direction from an upper end portion of the vertical conveying portion are provided, and the horizontal conveying portion is rotatable around the axis of the vertical conveying portion to discharge the grains. The apparatus is configured such that the horizontal transport section can be positioned at a storage position set inside the machine body in plan view, and the exhaust pipe cover is positioned below the lower end of the horizontal transport section at the storage position. preferably located on the side.

According to this characteristic configuration, it is possible to ensure that the exhaust pipe cover does not come into contact with the upper part of the barn when the combine harvester is stored in the barn or the like.

Furthermore, in the present invention, it is preferable that the exhaust pipe cover is formed in a shape that opens downward when viewed in cross section.

According to this characteristic configuration, even if straw waste or the like enters the exhaust pipe cover, the straw waste or the like that has entered the exhaust pipe cover can be easily discharged.

Furthermore, in the present invention, it is preferable that the exhaust pipe cover is provided with an inclined portion inclined downward on the side of the threshing device and an inclined portion downward on the side of the grain storage portion.

According to this characteristic configuration, even if straw or the like falls on the exhaust pipe cover, it slides down along the inclined portion, so that the straw or the like is even less likely to accumulate on the exhaust pipe cover.

Further, in the present invention, the exhaust pipe is supported by a lateral side wall of the threshing apparatus via a support member, a stay projecting horizontally from the lateral side wall, and a stay erected on the support member. and a base for supporting the exhaust pipe.

According to this characteristic configuration, it is possible to configure a structure in which the exhaust pipe is supported by the threshing device with a simple configuration of the stay and the base.

Further, the features of the present invention are a threshing device for threshing harvested culms, a grain storage unit provided side by side with the threshing device for storing grains after threshing, and a purifier for purifying engine exhaust. An exhaust purification device, an exhaust pipe that passes between the threshing device and the grain storage unit in plan view and discharges the exhaust after purification processing by the exhaust purification device, and an exhaust pipe that covers the exhaust pipe from above. A cover is provided, wherein the exhaust pipe is supported by the threshing device, the exhaust pipe cover is supported by the exhaust pipe, and the grain storage section swings around a vertically extending axis. A position holding mechanism that is configured to be dynamically openable and closable and holds the grain storage portion in a closed position is provided, the position holding mechanism is covered by the exhaust pipe cover, and the position holding mechanism is included in the exhaust pipe cover. An opening is formed in a portion corresponding to the .

According to this characteristic configuration, it is possible to prevent the exhaust pipe cover from interfering with the holding mechanism.

It is a right view which shows a self-threshing combine. It is a top view which shows a self-threshing combine. It is a left view which shows an operation|movement part. It is a top view which shows an operation|movement part. It is a right side view showing an exhaust pipe and an exhaust pipe cover. FIG. 4 is a plan view showing an exhaust pipe and an exhaust pipe cover; It is a right side sectional view showing an exhaust pipe and an exhaust pipe cover. It is a front sectional view showing an exhaust pipe and an exhaust pipe cover. The right side showing the relationship between the position where the rear end of the first cover body and the front end of the second cover body overlap and the position where the rear end of the first exhaust pipe member and the front end of the second exhaust pipe member overlap. It is a cross-sectional view. FIG. 4 is a front view showing an exhaust pipe and an exhaust pipe cover; It is a right view which shows the relationship between a position holding mechanism and an exhaust pipe cover. A position where the rear end of the first cover body and the front end of the second cover body overlap, and a position where the rear end of the first exhaust pipe member and the front end of the second exhaust pipe member overlap, according to another embodiment. It is a right side cross-sectional view showing the relationship between. It is a back sectional view showing an exhaust pipe, an exhaust pipe cover, and a closing member concerning another embodiment. It is a right view which shows the front-end part and cover of a 1st cover body based on another embodiment. It is a rear cross-sectional view showing an exhaust pipe, an exhaust pipe cover, and a blocking member according to another embodiment.

A mode for carrying out the present invention will be described based on the drawings. In the following description, the direction of arrow F is the "front side of the fuselage" (see FIGS. 1 and 2), the direction of arrow B is the "rear side of the fuselage" (see FIGS. 1 and 2), and the direction of arrow L is the " The left side of the machine body" (see Fig. 2), and the direction of the arrow R is the right side of the machine body" (see Fig. 2).

[Overall configuration of combine harvester]
1 and 2 show a self-threshing combine. The combine is provided with a body frame 1 and a pair of left and right crawler traveling devices 2. - 特許庁A reaping part 3 for reaping planted grain culms is provided in front of the traveling machine body. A driving unit 4 on which a driver rides is provided on the right side of the front part of the traveling machine body. An engine room ER in which an engine E is accommodated is provided below the operating section 4 . A threshing device 5 for threshing the harvested grain culms is provided behind the harvesting unit 3 . A conveying unit 6 for conveying harvested grain culms from the harvesting unit 3 toward the threshing unit 5 is provided across the harvesting unit 3 and the threshing unit 5 . A grain storage tank 10 (grain storage unit) for storing grains after threshing is provided side by side with the threshing device 5 . The grain storage tank 10 can be opened and closed by swinging around an axis Z1 extending in the vertical direction between a working position (closed position) and a maintenance position (open position).

A grain discharging device 11 (working device) for discharging grains in the grain storage tank 10 to the outside is provided. The grain discharging device 11 includes a vertical conveying unit 12 that conveys the grains in the grain storage tank 10 upward, and a horizontal conveying unit 13 that conveys the grains from the vertical conveying unit 12 toward the outside of the machine body. and is provided. The grain discharging device 11 is configured to be able to turn around an axis Z1 extending in the vertical direction (the axis of the vertical conveying section 12), and is laterally adjacent to the grain storage tank 10 on the side of the threshing device 5 (left side). adjacent) can be stored in the storage position. A lower end portion of the vertical conveying portion 12 is connected to the bottom portion of the grain storage tank 10 for communication. The end portion of the horizontal transport portion 13 on the side of the vertical transport portion 12 is connected to the upper end portion of the vertical transport portion 12 and is supported so as to be vertically swingable.

As shown in FIG. 3, a transmission T for shifting power from the engine E is provided. The transmission T includes a hydraulic continuously variable transmission (HST) 14 as a main transmission and a transmission case 15 . The transmission case 15 accommodates a gear-type auxiliary transmission and the like.

[Driver]
As shown in FIGS. 3 and 4 , the driving section 4 is provided in front of the grain storage tank 10 and laterally adjacent (to the right) of the conveying section 6 . The driver's seat 16 , a front panel 17 and side panels 18 are provided in the driver's seat 4 . An air cleaner 19 for the engine E and a precleaner 20 for the engine E are provided behind the driver's seat 16 . The air cleaner 19 is obliquely arranged in a plan view so that the right end thereof is located forward.

A steering lever 21 , a meter panel 22 , a combination switch 23 and a starter switch 24 are provided on the front panel 17 . The steering lever 21 is used to steer the traveling machine body, raise and lower the reaping unit 3, and the like. The combination switch 23 is used to turn on/off the headlights, operate the horn, and the like. The starter switch 24 is for starting and stopping the engine E. As shown in FIG.

The side panel 18 is provided on one side (left side) of the driver's seat 16 in the left-right direction of the machine body, which is the side where the transport section 6 is located. The side panel 18 is provided with an upper plate 25 forming an upper surface portion and an exterior cover 26 covering the upper plate 25 from above. The left and right range of the threshing device 5 and the left and right range of the side panel 18 overlap. The side panel 18 is provided with a main gear shift lever 27, an auxiliary gear shift lever 28, a clutch lever 29, a machine body posture control switch 30 (machine body posture control tool), and a grain discharge device control switch 31 (work device posture control tool). there is A portion of the side panel 18 adjacent to the driver's seat 16 is formed with an inclined portion 18a that slopes downward (downward to the right) toward the driver's seat 16 so as not to interfere with the driver's seat 16 .

The main shift lever 27 shifts the HST 14 . The main shift lever 27 is configured to be swingable back and forth around an axis X1 extending in the lateral direction of the machine body. The sub-transmission lever 28 shifts the sub-transmission device. The clutch lever 29 switches between a reaping clutch (not shown) and a threshing clutch (not shown).

The aircraft posture operation switch 30 is used to set the posture of the aircraft to a horizontal state (front-rear direction, left-right direction). The aircraft posture operation switch 30 includes an automatic operation switch 30a, a front/rear manual operation switch 30b, and a left/right manual operation switch 30c. The automatic operation switch 30a, the front/rear manual operation switch 30b, and the left/right manual operation switch 30c are arranged in this order from the front side. The automatic operation switch 30a is for automatically operating the posture of the aircraft so that it is horizontal in the front-rear direction and the left-right direction. The front/rear manual operation switch 30b is manually operated so that the posture of the machine body is horizontal in the front/rear direction. The left/right manual operation switch 30c is for manually operating the body so that the attitude of the machine body is horizontal in the left/right direction.

The grain discharging device operation switch 31 includes a clutch switching operation portion for switching a grain discharging clutch (not shown) between an on state and an off state, a turning operation portion for turning the grain discharging device 11, a grain A lifting operation section for lifting and lowering the discharge device 11 is provided.

〔engine room〕
As shown in FIGS. 3 to 6, in the engine room ER, in addition to the engine E, an exhaust purification device 32 for purifying exhaust gas from the engine E, a radiator 33 for dissipating heat from the engine cooling water, and a cooling device for cooling the radiator 33 A fan 34 is housed. The radiator 33 is provided laterally outside (on the right side) of the engine E. As shown in FIG. A dust-proof cover 35 is provided to cover the radiator 33 and the right side of the engine room ER from the right side in such a manner as to allow ventilation and block the passage of dust.

The exhaust purification device 32 purifies the exhaust of the engine E with a DPF (diesel particulate filter). The exhaust purification device 32 is provided below the driving section 4 in front between the threshing device 5 and the grain storage tank 10 . The left and right range of the threshing device 5 and the left and right range of the exhaust purification device 32 overlap. The exhaust purification device 32 is provided above the engine E below the rear portion of the side panel 18 with its longitudinal direction extending along the longitudinal direction of the aircraft body. More specifically, the exhaust emission control device 32 is positioned in front of the threshing device 5 in a state in which the left and right range of the exhaust emission control device 32 overlaps the left and right range of the portion of the threshing device 5 on the grain storage tank 10 side (right side). Moreover, the longitudinal direction of the exhaust purification device 32 is provided along the longitudinal direction of the aircraft body. An exhaust port 32 a is provided at the upper outer periphery of the exhaust purification device 32 . The exhaust port 32a of the exhaust purification device 32 extends diagonally upward (diagonally upward to the right) on the grain storage tank 10 side (right side) in the left-right direction of the machine body.

The exhaust purification device 32 is provided with harnesses and stays for various sensors. An opening is formed in a portion of the upper plate 25 of the side panel 18 positioned above the exhaust purification device 32 so as not to interfere with the stay, the stay, etc., and a cover 96 covering the opening from above is provided. It is attached in a state of protruding upward from the upper surface of the upper plate 25 of the side panel 18 .

The exhaust purification device 32 is provided with a harness H for a temperature sensor. The harness H is routed so that its route is the shortest route. In this embodiment, the harness H extends from the upper portion of the exhaust purification device 32, extends downward through the left side of the exhaust purification device 32, and extends vertically between the exhaust purification device 32 and the engine E. It extends right through and extends downward through the right side with respect to the engine E.

An engine room forming body 37 that forms an engine room ER is provided. The engine room formation body 37 is provided with side panels 18 and an engine bonnet 38 . In the engine room formation body 37, the engine bonnet 38 is positioned on the right side and the side panel 18 is positioned on the left side. That is, the engine bonnet 38 constitutes the right side portion of the engine room formation body 37 , and the side panel 18 constitutes the left side portion of the engine room formation body 37 . The engine bonnet 38 is provided with a top plate 39 on which the driver's seat 16 is placed and supported, and a front wall 40 extending between the front end of the top plate 39 and the floor of the driving section 4 .

[Threshing device]
As shown in FIGS. 5 and 6, a threshing cylinder 41 is provided on the upper portion of the threshing device 5 so as to be rotatable around an axis Y1 extending in the longitudinal direction of the machine body. A top plate 42 is provided to cover the handling cylinder 41 from above. A sorting unit 43 is provided in the lower part of the threshing device 5 . The sorting unit 43 is configured to sort out the sorted materials and collect the first grains (single grains, etc.) and the second grains (branched grains, etc.). . A winnow 44 for blowing the sorting air is provided in the front part of the sorting unit 43 . A vertical conveying device 45 for conveying the first grains upward toward the grain storage tank 10 is provided on the right side of the threshing device 5 .

[Position holding mechanism]
As shown in FIGS. 10 and 11, a position holding mechanism 46 is provided for holding the grain storage tank 10 at the closed position. The position holding mechanism 46 includes a pin 47 , a hook 48 engageable with the pin 47 , a spring 49 and an operating rod 50 . The pin 47 is supported by a stay 51 fixed to the right side wall of the threshing device 5 . The hook 48 is swingably supported by a stay 52 fixed to the front surface of the grain storage tank 10 . A spring 49 oscillates and urges the hook 48 to engage with the pin 47 . The operating rod 50 swings the hook 48 toward the disengagement side.

The engagement of the hook 48 with the pin 47 holds the grain storage tank 10 in the closed position. By pulling the operating rod 50 from the lateral outer side (right side) of the machine body, the hook 48 is swung against the biasing force of the spring 49 toward the disengagement side. With the hook 48 disengaged from the pin 47, the grain storage tank 10 can be swung to the open position.

〔Exhaust pipe〕
As shown in FIGS. 5 to 11, an exhaust pipe 36 is provided for discharging exhaust after purification by the exhaust purification device 32 . The exhaust pipe 36 is passed between the threshing device 5 and the grain storage tank 10 in plan view. The exhaust pipe 36 extends upward from the exhaust port 32a of the exhaust purification device 32, and then extends rearward while being inclined upward to the rear. The exhaust pipe 36 extends back and forth between a position corresponding to the front portion of the threshing device 5 and a position corresponding to the rear portion of the threshing device 5, and is located between the position corresponding to the front portion of the threshing device 5 and the threshing device. It is located above the threshing device 5 across the position corresponding to the rear part of 5. The exhaust pipe 36 is located below the upper end of the grain storage tank 10 and below the lower end of the grain discharging device 11 (horizontal conveying section 13) at the storage position. The exhaust pipe 36 is supported by the right side wall of the threshing device 5 . The exhaust pipe 36 is positioned on the front side of the winnow 44 and above the threshing device 5 .

The exhaust pipe 36 is provided with a tail pipe 53 and an exhaust pipe main body 54 . The exhaust pipe main body 54 is divided into a plurality of (three in this embodiment) exhaust pipe members in the exhaust flow direction. In this embodiment, the exhaust pipe body 54 is divided into a first exhaust pipe member 55, a second exhaust pipe member 56, and a third exhaust pipe member 57 in the exhaust flow direction from the exhaust upstream side. The exhaust pipe 36 is configured such that the diameter of the tail pipe 53 , first exhaust pipe member 55 , second exhaust pipe member 56 and third exhaust pipe member 57 increases in this order. The first exhaust pipe member 55 , the second exhaust pipe member 56 and the third exhaust pipe member 57 extend rearward to a position above the threshing device 5 . The inclination angle α1 of the second exhaust pipe member 56 to the horizontal plane and the inclination angle α1 of the third exhaust pipe member 57 to the horizontal plane are smaller than the inclination angle α2 of the first exhaust pipe member 55 to the horizontal plane. In this embodiment, the inclination angle α1 of the second exhaust pipe member 56 with respect to the horizontal plane and the inclination angle α1 with respect to the horizontal surface of the third exhaust pipe member 57 are the same.

[Tail pipe]
The tail pipe 53 is bolted to the exhaust port 32a of the exhaust purification device 32 . The tailpipe 53 extends diagonally upward (diagonally upward to the right) toward the grain storage tank 10 (right side) in the left-right direction of the machine body from the outer peripheral upper portion of the exhaust purification device 32, and then bends rearward. In other words, the tailpipe 53 is bent toward the threshing device 5 (left side) in the left-right direction of the machine body and connected to the exhaust port 32a of the exhaust purification device 32 . The tailpipe 53 has an upwardly extending portion 53a extending obliquely upward on the grain storage tank 10 side (right side) from the exhaust port 32a of the exhaust purification device 32, and an upper end portion of the upwardly extending portion 53a. A rearward extension portion 53b that extends rearward is provided. A bent portion of the tail pipe 53 (a connection portion between the upwardly extending portion 53 a and the rearwardly extending portion 53 b ) is positioned above the upper plate 25 of the side panel 18 .

An opening 18c through which the tail pipe 53 (upwardly extending portion 53a) is passed is formed in the rear portion of the upper plate 25 of the side panel 18. As shown in FIG. The tail pipe 53 extends upward from below the upper plate 25 of the side panel 18 through the opening 18c. The opening 18c is located behind the backrest of the driver's seat 16. As shown in FIG.

[First exhaust pipe member]
A front end portion of the first exhaust pipe member 55 is formed with an enlarged diameter portion 55a whose diameter increases toward the front end. The rear end portion of the first exhaust pipe member 55 is formed with a bent portion 55b that is bent downward so that the inclination angle with respect to the horizontal plane is small. A rear end portion of the tail pipe 53 and a front end portion of the first exhaust pipe member 55 overlap each other with a gap therebetween. In this embodiment, the front end portion of the first exhaust pipe member 55 overlaps the rear end portion of the tail pipe 53 with a gap from the outside.

The first exhaust pipe member 55 is supported by the right side wall of the threshing device 5 via a first support member 58 and a second support member 59 . The first support member 58 is provided across the front portion of the first exhaust pipe member 55 and the right side wall of the threshing device 5 . The first support member 58 includes a stay 63 fixed to the right side wall of the threshing device 5 and a base 64 that supports the first exhaust pipe member 55 . The base 64 is fixed to the first exhaust pipe member 55 and bolted from the rear while being abutted against the stay 63 from the rear side.

The second support member 59 is provided across the rear portion of the first exhaust pipe member 55 and the right side wall of the threshing device 5 . The second support member 59 includes a stay 65 fixed to the right side wall of the threshing device 5 and projecting horizontally from the right side wall of the threshing device 5, and a stay 65 standing upright to support the first exhaust pipe member 55. A base 66 is provided. The base 66 is fixed to the first exhaust pipe member 55 and bolted from below while being erected on the stay 65 .

[Second exhaust pipe member]
The second exhaust pipe member 56 is configured by a straight pipe. A rear end portion of the first exhaust pipe member 55 and a front end portion of the second exhaust pipe member 56 overlap with each other with a gap therebetween. In this embodiment, the front end portion of the second exhaust pipe member 56 overlaps the rear end portion of the first exhaust pipe member 55 with a gap from the outside.

The second exhaust pipe member 56 is supported by the right side wall of the threshing device 5 via the third support member 60 and the fourth support member 61 . The third support member 60 is provided across the front portion of the second exhaust pipe member 56 and the right side wall of the threshing device 5 . The third support member 60 includes a stay 67 fixed to the right side wall of the threshing device 5 and projecting horizontally from the right side wall of the threshing device 5, and a stay 67 erected to support the second exhaust pipe member 56. A base 68 is provided. The base 68 is fixed to the second exhaust pipe member 56 and bolted from below while being erected on the stay 67 .

The fourth support member 61 is provided across the rear portion of the second exhaust pipe member 56 and the right side wall of the threshing device 5 . The fourth support member 61 includes a stay 69 fixed to the right side wall of the threshing device 5 and projecting horizontally from the right side wall of the threshing device 5, and a stay 69 erected to support the second exhaust pipe member 56. A base 70 is provided. The base 70 is fixed to the second exhaust pipe member 56 and bolted from below while being erected on the stay 69 .

[Third exhaust pipe member]
The third exhaust pipe member 57 is configured by a straight pipe. A rear end portion of the second exhaust pipe member 56 and a front end portion of the third exhaust pipe member 57 overlap each other with a gap therebetween. In this embodiment, the front end portion of the third exhaust pipe member 57 overlaps the rear end portion of the second exhaust pipe member 56 with a gap from the outside. The third exhaust pipe member 57 is provided with a wind direction plate 71 that sets the wind direction of the exhaust air so as to be inclined rearwardly upward.

The third exhaust pipe member 57 is supported by the right side wall of the threshing device 5 via the fifth support member 62 . The fifth support member 62 is provided across the rear portion of the third exhaust pipe member 57 and the right side wall of the threshing device 5 . The fifth support member 62 includes a stay 72 fixed to the right side wall of the threshing device 5 and projecting horizontally from the right side wall of the threshing device 5, and a stay 72 erected to support the third exhaust pipe member 57. A base 73 is provided. The base 73 is fixed to the third exhaust pipe member 57 and bolted from above while standing on the stay 72 .

[Exhaust pipe cover]
As shown in FIGS. 5 to 8, an exhaust pipe cover 74 is provided to cover the exhaust pipe main body 54 from above. The exhaust pipe cover 74 is positioned below the upper end of the grain storage tank 10 and below the lower end of the grain discharging device 11 (horizontal conveying section 13) at the storage position. The exhaust pipe cover 74 is supported by the exhaust pipe 36 . A gap S is provided between the exhaust pipe cover 74 and the right side wall of the threshing device 5 over the entire length of the exhaust pipe cover 74 . Thereby, straw waste etc. can be dropped from the gap S.

The exhaust pipe cover 74 is divided into a plurality of (three in this embodiment) cover bodies in the exhaust flow direction corresponding to the plurality of exhaust pipe members. In this embodiment, the exhaust pipe cover 74 is divided into a first cover body 75, a second cover body 76 and a third cover body 77 from the exhaust upstream side in the exhaust flow direction. The first cover body 75 , the second cover body 76 and the third cover body 77 extend rearward to a position above the threshing device 5 .

[First cover body]
The first cover body 75 is a portion of the exhaust pipe cover 74 corresponding to the first exhaust pipe member 55 . The pin 47 is covered with a first cover body 75 . The first cover body 75 is formed in a shape that opens downward in a cross-sectional view. The first cover body 75 is provided with a first left half portion 78 , a first right half portion 79 and side plates 80 . A first right half portion 79 covers the first left half portion 78 from above. An upper portion of the first left half portion 78 is formed with an inclined portion 78a inclined downward to the side of the threshing device 5 (downward to the left). An upper portion of the first right half portion 79 is formed with an inclined portion 79a that is inclined downward to the side of the grain storage tank 10 (downward to the right). A downward opening 79b is formed in the right side of the first right half 79 (see FIG. 11).

The side plate 80 is bolted from the right side to the right side surface of the first right half portion 79 so as to cover the opening 79b. A portion of the side plate 80 corresponding to the position holding mechanism 46 is formed with an opening 80a opening downward. This allows hook 48 to enter opening 80 a and engage pin 47 .

The first cover body 75 is supported by the first exhaust pipe member 55 via an upper stay 81 , a lateral stay 82 , a front lower stay 83 and a rear lower stay 84 . The first cover body 75 is bolted to the upper stay 81 , the horizontal stay 82 , the front lower stay 83 and the rear lower stay 84 . The upper stay 81 is fixed to the upper portion of the first exhaust pipe member 55 . The left horizontal stay 82 is fixed to the left side of the first exhaust pipe member 55 . The right lateral stay 82 is fixed to the right side of the first exhaust pipe member 55 . The front lower stay 83 is fixed to the base 64 (first support member 58). The rear lower stay 84 is fixed to the base 66 (second support member 59).

[Second cover body]
The second cover body 76 is a portion of the exhaust pipe cover 74 corresponding to the second exhaust pipe member 56 . The second cover body 76 is formed in a shape that opens downward when viewed in cross section. The second cover body 76 is provided with a second left half portion 85 and a second right half portion 86 . A second right half portion 86 covers the second left half portion 85 from above. An upper portion of the second left half portion 85 is formed with an inclined portion 85a inclined downward to the side of the threshing device 5 (downward to the left). An upper portion of the second right half portion 86 is formed with an inclined portion 86a that is inclined downward to the side of the grain storage tank 10 (downward to the right). A rear end portion of the first cover body 75 and a front end portion of the second cover body 76 overlap with each other with a gap therebetween. In this embodiment, the front end of the second cover body 76 overlaps the rear end of the first cover body 75 with a gap from the outside. A position where the rear end portion of the first cover body 75 and the front end portion of the second cover body 76 overlap with each other, and a position behind the first exhaust pipe member 55 so that straw dust and the like are difficult to enter and hot air is difficult to leak to the outside. A labyrinth structure is configured by shifting the position where the end portion and the front end portion of the second exhaust pipe member 56 overlap front and rear.

The second cover body 76 is supported by the second exhaust pipe member 56 via an upper stay 87 , a horizontal stay 88 , a front lower stay 89 and a rear lower stay 90 . The second cover body 76 is bolted to the upper stay 87 , the horizontal stay 88 , the front lower stay 89 and the rear lower stay 90 . The upper stay 87 is fixed to the upper portion of the second exhaust pipe member 56 . The left horizontal stay 88 is fixed to the left side of the second exhaust pipe member 56 . The right lateral stay 88 is fixed to the right side of the second exhaust pipe member 56 . The front lower stay 89 is fixed to the base 68 (the third support member 60). The rear lower stay 90 is fixed to the base 70 (fourth support member 61).

[Third cover body]
The third cover body 77 is a portion of the exhaust pipe cover 74 corresponding to the third exhaust pipe member 57 . The third cover body 77 is formed in a shape that opens downward when viewed in cross section. The third cover body 77 is provided with a third left half portion 91 and a third right half portion 92 . A third right half portion 92 covers the third left half portion 91 from above. An upper portion of the third left half portion 91 is formed with an inclined portion 91a inclined downward to the side of the threshing device 5 (downward to the left). An upper portion of the third right half portion 92 is formed with an inclined portion 92a that is inclined downward to the side of the grain storage tank 10 (downward to the right). A rear end portion of the second cover body 76 and a front end portion of the third cover body 77 overlap each other with a gap therebetween. In this embodiment, the front end portion of the third cover body 77 overlaps the rear end portion of the second cover body 76 with a gap from the outside. A position where the rear end portion of the second cover body 76 and the front end portion of the third cover body 77 overlap and a position behind the second exhaust pipe member 56 are arranged so that straw dust and the like are difficult to enter and hot air is difficult to leak to the outside. A labyrinth structure is formed by shifting the overlapping position of the end portion and the front end portion of the third exhaust pipe member 57 back and forth.

The third cover body 77 is supported by the third exhaust pipe member 57 via the upper stay 93 and the horizontal stay 94 . The third cover body 77 is bolted to the upper stay 93 and the horizontal stay 94, and bolted to both left and right sides of the base 73 (fifth support member 62). The upper stay 93 is fixed to the upper portion of the third exhaust pipe member 57 . The left horizontal stay 94 is fixed to the left side of the third exhaust pipe member 57 . The right lateral stay 94 is fixed to the right side of the third exhaust pipe member 57 .
By the portion of the first left half 78, the second left half 85 and the third left half 91 located higher than the threshing device 5, and the first right half 79 and the second right half One widthwise side of the exhaust pipe cover 74 covering the portion of the exhaust pipe 36 positioned higher than the threshing device 5 by the portion positioned higher than the threshing device 5 among the 86 and the third right half portion 92 and a portion on the other side in the width direction.

〔cover〕
A cover 95 is provided to cover the tail pipe 53, the front portion of the first exhaust pipe member 55, and the opening 18c from above. The cover 95 is bolted to the top plate 25 of the side panel 18 and the like. The front end of the first cover body 75 is inserted inside the cover 95 from behind.

[How to assemble the exhaust pipe unit]
A unit (hereinafter referred to as a "first exhaust pipe unit") is configured in a state in which the first cover body 75 is assembled to the first exhaust pipe member 55, and the second cover body 76 is assembled to the second exhaust pipe member 56. A unit (hereinafter referred to as a "second exhaust pipe unit") is configured in this state, and a unit (hereinafter referred to as a "third exhaust pipe unit") is constructed in a state in which the third cover member 77 is assembled to the third exhaust pipe member 57. ) will be constructed. In this embodiment, the first exhaust pipe unit, the second exhaust pipe unit and the third exhaust pipe unit are assembled to the right side wall of the threshing device 5 in the following procedure.

Specifically, first, the third exhaust pipe unit is assembled to the right side wall of the threshing device 5 via the fifth support member 62 . Next, the second exhaust pipe unit is assembled to the right side wall of the threshing device 5 via the third support member 60 and the fourth support member 61 . At that time, the rear end of the second cover body 76 is inserted into the front end of the third cover body 77, and the rear end of the second exhaust pipe member 56 is inserted into the front end of the third exhaust pipe member 57. do.

Finally, the first exhaust pipe unit is assembled to the right side wall of the threshing device 5 via the first support member 58 and the second support member 59 . At that time, the rear end of the first cover body 75 is inserted into the front end of the second cover body 76, and the rear end of the first exhaust pipe member 55 is inserted into the front end of the second exhaust pipe member 56. do.

Here, it is preferable to assemble the first exhaust pipe unit without the side plate 80 attached. As a result, when inserting the first exhaust pipe member 55 into the second exhaust pipe member 56, it is easy to visually recognize the positions of the pipe centers of each other.

[Another embodiment]
(1) In the above-described embodiment, the exhaust pipe 36 is located on the front side of the winnow 44 and above the threshing device 5 . However, the exhaust pipe 36 does not have to be positioned above the threshing device 5 at a position on the front side of the winnow 44 . In this case, the exhaust pipe 36 may be located above the threshing device 5 at a position behind the winnow 44 . Alternatively, the exhaust pipe 36 may be positioned above the threshing device 5 at the front and rear positions corresponding to the winnow 44 .

(2) In the above embodiment, the exhaust pipe 36 is positioned below the upper end of the grain storage tank 10 . However, the exhaust pipe 36 may be positioned above the upper end of the grain storage tank 10 .

(3) In the above embodiment, the exhaust pipe 36 is located below the lower end of the grain discharging device 11 (horizontal conveying section 13) at the storage position. However, the exhaust pipe 36 may be positioned above the lower end of the grain discharging device 11 (horizontal conveying section 13) at the storage position.

(4) In the above-described embodiment, the exhaust pipe 36 extends upward from the exhaust port 32a of the exhaust purification device 32, and then extends rearward while being inclined upward. However, the exhaust pipe 36 may extend rearward from the exhaust port 32a of the exhaust gas purification device 32 while being inclined upward to the rear.

(5) In the above embodiment, the exhaust pipe cover 74 is supported by the exhaust pipe 36 . However, the exhaust pipe cover 74 may be supported by the threshing device 5 in addition to the exhaust pipe 36 .

(6) In the above-described embodiment, the exhaust pipe cover 74 includes the inclined portions 78a, 85a, and 91a inclined downward (leftward) toward the threshing device 5 and inclined portions downward toward the grain storage tank 10 (rightward). 79a, 86a, 92a are provided. However, the exhaust pipe cover 74 may be provided with only the sloped portions 78a, 85a, and 91a that slope downward on the side of the threshing device 5 (downward on the left side). Alternatively, the exhaust pipe cover 74 may be provided with only inclined portions 79a, 86a, and 92a inclined downward (downward to the right) on the grain storage tank 10 side.

(7) In the above embodiment, the exhaust pipe body 54 is divided into the first exhaust pipe member 55, the second exhaust pipe member 56, and the third exhaust pipe member 57 in the exhaust flow direction. However, the exhaust pipe main body 54 may be divided into two or four or more exhaust pipe members in the exhaust flow direction. Alternatively, the exhaust pipe main body 54 may not be divided.

(8) In the above embodiment, the exhaust pipe cover 74 is divided into the first cover body 75, the second cover body 76 and the third cover body 77 corresponding to the plurality of exhaust pipe members in the exhaust flow direction. However, the exhaust pipe cover 74 may be divided in the exhaust flow direction into two or four or more exhaust pipe members corresponding to the plurality of exhaust pipe members. Alternatively, the exhaust pipe cover 74 may be divided in the exhaust flow direction into a plurality of cover bodies different from the plurality of exhaust pipe members. Alternatively, the exhaust pipe cover 74 may not be split.

(9) In the above embodiment, the front end of the second exhaust pipe member 56 overlaps the rear end of the first exhaust pipe member 55 with a gap from the outside, and the front end of the third exhaust pipe member 57 overlaps the rear end portion of the second exhaust pipe member 56 with a gap from the outside. However, the rear end portion of the first exhaust pipe member 55 may overlap the front end portion of the second exhaust pipe member 56 with a gap from the outside, or the rear end portion of the second exhaust pipe member 56 may overlap the front end portion of the second exhaust pipe member 56. It may overlap with the front end portion of the third exhaust pipe member 57 with a gap from the outside.

(10) In the above embodiment, the front end of the second cover body 76 overlaps the rear end of the first cover body 75 with a gap from the outside, and the front end of the third cover body 77 overlaps the rear end of the first cover body 75. It overlaps with the rear end portion of the cover body 76 with a gap from the outside. However, the rear end of the first cover body 75 may overlap the front end of the second cover body 76 with a gap from the outside, and the rear end of the second cover body 76 may overlap the front end of the second cover body 76. It may overlap the front end of 77 with a gap from the outside.

(11) In the above embodiment, the inclination angle α1 of the second exhaust pipe member 56 with respect to the horizontal plane and the inclination angle α1 with respect to the horizontal surface of the third exhaust pipe member 57 are smaller than the inclination angle α2 with respect to the horizontal surface of the first exhaust pipe member 55. Moreover, the inclination angle α1 of the second exhaust pipe member 56 with respect to the horizontal plane and the inclination angle α1 with respect to the horizontal surface of the third exhaust pipe member 57 are the same. However, the inclination angle of the third exhaust pipe member 57 with respect to the horizontal plane may be smaller than the inclination angle of the second exhaust pipe member 56 with respect to the horizontal plane. That is, among the first exhaust pipe member 55, the second exhaust pipe member 56, and the third exhaust pipe member 57, the third exhaust pipe member 57 located on the exhaust downstream side may have a smaller inclination angle with respect to the horizontal plane. Alternatively, the inclination angle with respect to the horizontal plane of the first exhaust pipe member 55, the inclination angle with respect to the horizontal surface of the second exhaust pipe member 56, and the inclination angle with respect to the horizontal surface of the third exhaust pipe member 57 may be the same.

(12) In the above embodiment, the exhaust pipe cover 74 is positioned below the upper end of the grain storage tank 10 . However, the exhaust pipe cover 74 may be positioned above the upper end of the grain storage tank 10 .

(13) In the above embodiment, the exhaust pipe cover 74 is located below the lower end of the grain discharging device 11 (horizontal conveying section 13) in the storage position. However, the exhaust pipe cover 74 may be positioned above the lower end of the grain discharging device 11 (horizontal conveying section 13) at the storage position.

(14) In the above embodiment, the opening 18c is formed in the rear part of the upper plate 25 of the side panel 18. As shown in FIG. However, the opening 18 c may be formed in the rear part of the top plate 39 of the engine bonnet 38 .

(15) In the above embodiment, the air cleaner 19 is obliquely arranged in a plan view so that the right end portion thereof is located forward. However, the air cleaner 19 may be arranged obliquely in a plan view so that the left end portion thereof is located forward. Alternatively, the air cleaner 19 may be arranged laterally in plan view.

(16) In the above embodiment, the front end of the first cover body 75 is inserted inside the cover 95 from behind. However, the rear end of the cover 95 may be inserted inside the first cover body 75 .

(17) In the above embodiment, the lateral range of the threshing device 5 and the lateral range of the side panel 18 overlap. However, the left-right range of the threshing device 5 and the left-right range of the side panel 18 do not have to overlap.

(18) In the above-described embodiment, the tail pipe 53 extends diagonally upward (diagonally upward to the right) toward the grain storage tank 10 (right side) in the left-right direction of the aircraft body from the outer peripheral upper portion of the exhaust purification device 32, curved to the rear. However, the tail pipe 53 may extend laterally toward the grain storage tank 10 (right side) in the left-right direction of the aircraft body from the outer peripheral upper portion of the exhaust purification device 32 and then bend rearward.

(19) In the above embodiment, the exhaust emission control device 32 is provided below the side panel 18 . However, the exhaust purification device 32 may be provided below the engine bonnet 38 (top plate 39).

(20) As shown in FIGS. 12 and 13, a closing member 97 may be provided that closes the gap between the rear end of the first cover body 75 and the front end of the second cover body 76 . In the following description, the same reference numerals are assigned to the same configurations as in the above embodiment, and the description may be omitted.

In this embodiment, as shown in FIGS. 12 and 13, the rear end portion of the first cover body 75 overlaps the front end portion of the second cover body 76 with a gap from the outside. That is, the rear end portion of the first cover body 75 is positioned above the front end portion of the second cover body 76 .

The closing member 97 is, for example, an elastically deformable rubber packing. The closing member 97 may be a sponge-like member, or may be a metal plate-like member or rod-like member. The closing member 97 is arranged while being sandwiched between the first cover body 75 and the second cover body 76 . Specifically, the closing member 97 is sandwiched between the lower surface of the first cover body 75 and the upper surface of the second cover body 76 . The closing member 97 is provided along the upper surface of the second cover body 76 from the left end of the inclined portion 85a of the second left half portion 85 to the right end of the inclined portion 86a of the second right half portion 86. there is The closing member 97 is provided along the upper surface of the first cover body 75 from the left end of the inclined portion 78a of the first left half portion 78 to the right end of the inclined portion 79a of the first right half portion 79. there is

In this embodiment, the rear end of the first cover body 75 and the front end of the second cover body 76 overlap each other, but the rear end of the first cover body 75 and the front end of the second cover body 76 overlap each other. Non-overlapping configurations are also possible. For example, the first cover body 75 and the second cover body 76 are arranged such that the rear end face of the first cover body 75 and the front end face of the second cover body 76 are in contact with each other or separated from each other in the front-rear direction. may The gap between the rear end of the first cover body 75 and the front end of the second cover body 76 is formed in a state where the rear end of the first cover body 75 and the front end of the second cover body 76 do not overlap each other. A closing member 97 may be provided.

(21) As shown in FIGS. 14 and 15, closing members 98 and 99 may be provided to close the front end portion of the first cover body 75 and the cover 95 (secondary cover). Both of the left and right closing members 98 and 99 are plate-like members and attached to the rear end portion of the cover 95 from the rear side. The left member 98 closes the gap between the first left half 78 and the cover 95 . The right member 99 blocks the space between the first right half 79 and the cover 95 .

In this embodiment, the front end portion of the first cover body 75 and the rear end portion of the cover 95 overlap each other. , and members 98 and 99 for closing the gap between the first cover body 75 and the cover 95 in that state may be provided.

INDUSTRIAL APPLICABILITY The present invention can be used not only for self-threshing combine harvesters but also for ordinary combine harvesters.

5 Threshing device 10 Grain storage tank (grain storage part)
11 grain discharge device 32 exhaust purification device 36 exhaust pipe 46 position holding mechanism 55 first exhaust pipe member 56 second exhaust pipe member 57 third exhaust pipe member 58 first support member 59 second support member 60 third support member 61 Fourth support member 62 Fifth support member 65 Stay 66 Base 67 Stay 68 Base 69 Stay 70 Base 71 Stay 73 Base 74 Exhaust pipe cover 75 First cover body 76 Second cover body 77 Third cover body 78 First left half part
78a inclined portion 79 first right half portion
79a Inclined portion 80a Opening 85 Second left half
85a inclined portion 86 second right half portion
86a inclined portion 91 third left half portion
91a inclined portion 92 third right half portion
92a Inclined portion 95 Cover (secondary cover)
97 Closing member 98 Closing member 99 Closing member E Engine Z1 Axis center α1 Inclination angle α2 Inclination angle

Claims (16)

a threshing device for threshing harvested grain culms;
a grain storage unit provided side by side with the threshing device and storing grains after threshing;
an exhaust purification device for purifying engine exhaust;
In a plan view, the exhaust gas passes between the threshing device and the grain storage unit, extends to a position higher than the top plate of the threshing device in a rearwardly upwardly inclined state, and is exhaust after purification treatment by the exhaust gas purification device. an exhaust pipe for discharging the
an exhaust pipe cover that covers the exhaust pipe from above,
The exhaust pipe is supported by the threshing device, and the exhaust pipe cover is supported by the exhaust pipe,
The exhaust pipe cover covers the exhaust pipe so as to surround the side and upper side of one width direction side of the exhaust pipe and the other side side of the exhaust pipe in the width direction,
The portion on the one side in the width direction of the exhaust pipe cover that covers a portion of the exhaust pipe positioned higher than the threshing device is arranged to cover a position higher than the exhaust pipe and the top plate in a side view. A combine harvester. The exhaust pipe is divided into a plurality of exhaust pipe members in an exhaust flow direction,
2. The combine according to claim 1, wherein said exhaust pipe cover is divided into a plurality of cover bodies in the exhaust flow direction corresponding to said plurality of exhaust pipe members. In the plurality of exhaust pipe members, an exhaust downstream end portion of the exhaust pipe member on the exhaust upstream side and an exhaust upstream end portion of the exhaust pipe member on the exhaust downstream side overlap with each other with a gap therebetween,
3. The combine according to claim 2, wherein in the plurality of cover bodies, an exhaust downstream end portion of the cover body on the exhaust upstream side and an exhaust upstream end portion of the cover body on the exhaust downstream side overlap with each other with a gap left therebetween. . an exhaust upstream end portion of the exhaust downstream side exhaust pipe member overlaps an exhaust downstream end portion of the exhaust upstream side exhaust pipe member from the outside;
The combine according to claim 3, wherein an exhaust upstream end portion of the cover body on the exhaust downstream side overlaps an exhaust downstream end portion of the cover body on the exhaust upstream side from the outside. 5. A closing member for closing a gap between an exhaust downstream end portion of the cover body on the exhaust upstream side and an exhaust upstream end portion of the cover body on the exhaust downstream side is provided. 1. The combine according to item 1. The combine according to claim 5, wherein the closing member is a packing sandwiched between the cover body on the upstream side of the exhaust gas and the cover body on the downstream side of the exhaust gas. a sub-cover covering from above an exhaust upstream end of an exhaust pipe member positioned most upstream of the exhaust pipe members among the plurality of exhaust pipe members,
7. A closing member is provided for closing a gap between an exhaust upstream end portion of a cover body positioned most upstream of the exhaust gas among the plurality of cover bodies and the sub cover. The combine described in . The combine according to claim 7, wherein the closing member is a plate-shaped member that covers the gap between the cover body and the sub-cover from the exhaust downstream side. The combine according to any one of claims 2 to 8, wherein an exhaust pipe member positioned further downstream of the exhaust among the plurality of exhaust pipe members has a smaller inclination angle with respect to the horizontal plane. Among the plurality of exhaust pipe members, the exhaust pipe member located on the most upstream side of the exhaust gas and the cover body located on the most upstream side of the exhaust gas among the plurality of cover bodies extend rearward to a position above the threshing device. 10. A combine as claimed in claim 9 which is elongated. The combine according to any one of claims 1 to 10, wherein the exhaust pipe cover is located below the upper end of the grain storage section. A grain discharging device for discharging the grains in the grain storage unit to the outside is provided,
The grain discharge device is connected to the rear lower part of the grain storage unit and includes a vertical conveying unit extending in the vertical direction and a horizontal conveying unit extending in the horizontal direction from the upper end of the vertical conveying unit.
The horizontal conveying section is rotatable around the axis of the vertical conveying section,
The grain discharging device is configured so that the horizontal conveying unit can be positioned at a storage position set inside the machine body in plan view,
The combine according to claim 11, wherein the exhaust pipe cover is located below the lower end of the horizontal conveying portion at the storage position. The combine according to any one of claims 1 to 12, wherein the exhaust pipe cover is formed in a shape opening downward in a cross-sectional view. 14. The combine according to claim 13, wherein the exhaust pipe cover is provided with an inclined portion inclined downward on the side of the threshing device and an inclined portion downward on the side of the grain storage portion. The exhaust pipe is supported by a lateral side wall of the threshing device via a support member,
The support member according to any one of claims 1 to 14, wherein the support member includes a stay extending horizontally from the side wall, and a base erected from the stay and supporting the exhaust pipe. combine. a threshing device for threshing harvested grain culms;
a grain storage unit provided side by side with the threshing device and storing grains after threshing;
an exhaust purification device for purifying engine exhaust;
an exhaust pipe that passes between the threshing device and the grain storage unit in a plan view and that discharges exhaust after purification by the exhaust purification device;
an exhaust pipe cover that covers the exhaust pipe from above,
The exhaust pipe is supported by the threshing device, and the exhaust pipe cover is supported by the exhaust pipe,
The grain storage part is configured to be swingable and openable around an axis extending in the vertical direction,
A position holding mechanism for holding the grain storage unit in the closed position is provided,
The position holding mechanism is covered by the exhaust pipe cover,
A combine harvester in which an opening is formed in a portion of the exhaust pipe cover corresponding to the position holding mechanism.

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