Combine harvester

Abstract

There is a combine harvester in which a tail pipe for guiding exhaust gas of an engine is provided between a threshing device and a storage hopper, and a plate for guiding the exhaust gas upward is provided at a rear end portion of the tail pipe. However, due to the influence of wind or the like, the exhaust gas carrying hot air may flow toward an operator who performs a grain recovery operation outside the storage hopper. In view of this, a combine harvester is provided in which exhaust air is less likely to be directed toward the operator so that the operator can easily concentrate on the work.SOLUTION: In a combine harvester in which a reaping device (5), a threshing device (6), and a storage hopper (30) are provided in a machine body provided with an engine, a traveling device, and a steering unit (7), and a side carrier (32) on which an operator rides is provided on an outer side of the storage hopper (30), a rear end portion of a tail pipe (52) that guides exhaust gas of the engine to a rear side of the machine body is positioned on a rear side of the machine body with respect to the threshing device (6), the storage hopper (30), and the side carrier (32) and on a front side with respect to a rear end portion of the machine body.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a combine harvester that performs harvesting operations in a farm field. [Background technology]

[0002] A tail pipe for guiding the engine exhaust is provided between the left and right sides of the threshing device and the storage hopper, and a plate for guiding the exhaust upward is provided at the rear end of the tail pipe (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-097644 Summary of the Invention [Problem to be solved by the invention]

[0004] Although this prevents exhaust air from being directed toward workers working outside the storage hopper, such as those collecting grain and installing storage bags, there was a problem in that hot exhaust air was blown toward the workers due to the influence of wind, etc., making it difficult for them to concentrate on their work.

[0005] Therefore, the present invention aims to provide a combine harvester that makes it difficult for exhaust air to be directed toward the operator, making it easier for the operator to concentrate on their work. [Means for solving the problem]

[0006] The invention described in claim 1 is a combine harvester having a body equipped with an engine E, running devices 3, 3 and a control unit 7, a harvesting device 5, a threshing device 6 and a storage hopper 30, and a side carrier 32 on which an operator rides outside the storage hopper 30, in which the rear end of a tail pipe 52 that guides the exhaust of the engine E to the rear of the body is positioned rearward of the body from the threshing device 6, the storage hopper 30 and the side carrier 32 and forward of the rear end of the body, and the upper end of the rear end of the tail pipe 52 is positioned lower than the upper end of the control unit 7.

[0007] According to the invention described in claim 1, by discharging the exhaust gas from the engine E from a position rearward of the side carrier 32, even if the exhaust gas is blown away by the influence of wind or the like, it is less likely to be directed toward a worker working on the side carrier 32, making it easier for the worker to concentrate on his or her work.

[0008] Furthermore, by positioning the rear end of the tail pipe 52 forward of the rear end of the aircraft body, it is possible to prevent the fore-and-aft length of the aircraft body from becoming too long.

[0009] Furthermore, since the upper end of the tailpipe 52 is positioned lower than the upper end of the control section 7, even if the exhaust is directed toward the front of the aircraft due to the wind direction, the components of the control section 7 act as a wall, making it less likely that the pilot will be affected by the heat.

[0010] The invention described in claim 2 is a combine described in claim 1 in which the tail pipe 52 is positioned near the left-right center of the body and between the left and right sides of the threshing device 6 and the storage hopper 30, and the rear side of the tail pipe 52 is supported by a pipe support stay 54 provided on the rear support frame 53 of the storage hopper 30.

[0011] According to the invention described in claim 2, even if the tail pipe 52 is heated by the passage of exhaust gas, the storage hopper 30 acts as a wall, making it difficult for radiant heat to reach the worker working on the side carrier 32, thereby preventing the worker from feeling unnecessary heat.

[0012] In addition, by supporting the rear side of the tail pipe 52 with a pipe support stay 54 provided on the rear support frame 53 of the storage hopper 30, the rear side of the tail pipe 52 can be prevented from moving up and down due to vibration of the aircraft, thereby preventing damage to the tail pipe 52 and preventing the exhaust direction from being disturbed.

[0013] The invention described in claim 3 is a combine described in claim 1 or claim 2, in which the front part of the tail pipe 52 is connected to a rear pipe 50a at the rear of a silencer 51 positioned further forward on the body than the tail pipe 52, a protective cover 55 is provided on the top of the silencer 51 to collect impurities such as straw chips, and the rear side of the protective cover 55 is positioned to cover the area above the connection between the rear pipe 50a and the tail pipe 52.

[0014] According to the invention described in claim 3, by covering the silencer 51 and the area around the connection between the rear pipe 50a and the tail pipe 52 with the protective cover 55, it is possible to prevent impurities from accumulating near the hot silencer 51 or the area around the connection between the rear pipe 50a and the tail pipe 52, which could lead to fire.

[0015] The invention described in claim 4 is a combine described in claim 1 or claim 2, in which a pipe cover 56 is provided on the tail pipe 52 to cover the top and left and right sides, the rear end 56a of the pipe cover 56 protrudes toward the rear of the body beyond the rear end 52a of the tail pipe 52, a space 57 is formed between the pipe cover 56 and the tail pipe 52, and the pipe cover 56 is attached to the tail pipe 52 from the outside with an attachment member 58.

[0016] According to the invention described in claim 4, the pipe cover 56 covers the top and sides of the tail pipe 52, and its rear end 56a is positioned further rearward of the aircraft than the rear end 52a of the tail pipe 52, so that the exhaust can be discharged rearward and downwardly of the aircraft, making it less likely that the exhaust will return to the aircraft.

[0017] Furthermore, since a space 57 is formed between the tail pipe 52 and the pipe cover 56, even if the tail pipe 52 is heated by exhaust, the heat is not easily transferred to the pipe cover 56, so that impurities adhering to the pipe cover 56 can be prevented from igniting.

[0018] The invention described in claim 5 is a combine described in claim 1 or claim 2, in which a grain conveying device 60 is provided between the threshing device 6 and the storage hopper 30 to transport threshed and sorted grains from the threshing device 6 to the storage hopper 30, and a return device 61 is provided to return processed material that could not be threshed and sorted to the threshing and sorting path, a clogging sensor 62 is provided on the top of the return device 61 to detect abnormalities such as clogging, a sensor cover 62a is provided to cover the outer periphery of the clogging sensor 62, a front stay 63 is provided on the grain conveying device 60 to support the front side of the tail pipe 52, and the front stay 63 is positioned to cover the top of the sensor cover 62a.

[0019] According to the invention described in claim 5, the front stay 63 and the sensor cover 62a can prevent impurities from clogging and interfering with the detection of the sensor 62, thereby preventing a false detection of a blockage and interruption of work even when the return of processed material to the threshing device 6 is operating normally. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a side view of a combine harvester according to an embodiment of the present invention. FIG. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. 2 is a perspective view of a main part of the combine harvester. [Figure 5] FIG. 2 is a side view of a main part of the combine harvester. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. [Figure 9]FIG. 10 is a plan view of a combine harvester showing another embodiment of the present invention. [Figure 10] FIG. 10 is a plan view of a main part of a combine harvester according to another embodiment. [Figure 11] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0021] A combine harvester according to one embodiment of the present invention will be described in detail below with reference to the drawings.

[0022] For ease of understanding, the description will be made for convenience, referring to the front as the front side, the rear as the rear side, the right hand side as the right side, and the left hand side as the left side, as seen from the operator's perspective, but the present invention is not limited to these.

[0023] FIG. 1 shows a side view of a combine harvester for harvesting grain according to an embodiment of the present invention, FIG. 2 shows a plan view of the combine harvester, and FIG. 3 shows a rear view of the combine harvester.

[0024] The lower part of the combine harvester's machine frame 1 is provided with left and right traveling devices 3, 3 equipped with crawlers 2 formed into an endless band shape made of a flexible material such as rubber.

[0025] A reaping device 5 is supported at the front of the machine frame 1 so as to be able to rotate up and down, and a threshing device 6 is mounted on the rear left side of the machine frame 1 behind the reaping device 5.

[0026] A control section 7 having an operator's seat 7a is provided on the front right side of the aircraft frame 1.

[0027] The control unit 7 consists of an operating seat 7a mounted on an engine cover 13 that covers the engine E (diesel engine, hereinafter referred to as the engine), a front operating panel located in front of the operating seat 7a, and a side operating panel located on the left side of the operating seat 7a.

[0028] On the front operation panel are a handle 7b that the operator holds when operating the vehicle in a standing position, and a steering lever 7c that switches the transmission mechanism in the transmission case to adjust the vehicle's running direction left and right.

[0029] On the side operation panel are a throttle lever 7d for adjusting the rotation speed of the engine E, a main speed change lever 7e for changing the speed of the hydrostatic continuously variable transmission that inputs drive to the transmission case, a sub-speed change lever 7f for changing the speed of the sub-speed change mechanism in the transmission case, a reaping clutch lever for switching the drive of the reaping device 5 on and off, and a threshing clutch lever for switching the drive of the threshing device 6 on and off.

[0030] The reaping device 5 is supported by a longitudinal frame 9 whose base is rotatably attached to the machine frame 1, and is configured to be movable up and down by a reaping cylinder.

[0031] The vertical frame 9 is configured in a rectangular cylindrical shape and is equipped with a conveying chain inside, which conveys the harvested crops reaped by the reaping device 5 to the threshing device 6.

[0032] To the right of the threshing device 6, there is provided a storage hopper 30 which stores the grain transported from the threshing device 6 and discharges it downward, and in front of the storage hopper 30 there is provided an operating unit 7 with an operating seat 7a.

[0033] A precleaner 15, which removes foreign matter from the engine intake air, is attached to a precleaner support member 15a, the base of which is fixed to the front of the storage hopper 30. The storage hopper 30 also serves as the support frame for the precleaner 15, contributing to weight reduction and cost reduction by reducing the number of parts and improving travelability across wet fields.

[0034] The precleaner 15 is disposed behind the operator seat 7a and is not aligned in a straight line with a tail pipe 52, which will be described later.

[0035] Therefore, by arranging the precleaner 15 at a distance to the side from the tail pipe 52, the precleaner 15 is less likely to take in high-temperature air even if the discharged exhaust air returns to the front side of the aircraft, and therefore, a decrease in engine performance due to exhaust air intake can be prevented.

[0036] The storage hopper 30 is provided with two funnel sections 30a, 30a at the front and rear, and the rice is put into a rice bag as a collection container from the lower parts of the two funnel sections 30a, 30a.

[0037] Below the funnel portions 30a, 30a of the storage hopper 30, a recovery carrier 31 is provided on which the rice bags are placed.

[0038] The side carrier 32 is located on the outer side of the machine body of the recovery carrier 31, which is located below the funnel portions 30a, 30a of the storage hopper 30, and has a pivot shaft in the front-to-rear direction at the end of the machine body, so that it can be freely switched and fixed between an open working state on the outer side of the machine body and a folded storage state inside the machine body.

[0039] During harvesting work, the side carriers 32 are opened outward from the machine body to a working state, and an operator gets on the side carriers 32, places a rice sack on the recovery carrier 31 set at a discharged rice sack receiving position, and fills the rice grains discharged from the funnel parts 30a, 30a of the storage hopper 30 into the rice sack.

[0040] When the rice bag is filled with grains, the worker gets off the side carrier 32, slides the collection carrier 31 onto the side carrier 32 on the side of the machine body, and lowers the rice bag placed on the collection carrier 31 outward from the machine body.

[0041] A backrest 41 is provided on the side carrier 32 on which an operator who works while riding on the side carrier 32 can lean. The backrest 41 is provided long in the front-rear direction at the tip of an arm 41a whose base is rotatably supported on the machine body, and its position can be freely changed between an active state where it is positioned on the side carrier 32 and a stored state where it is folded inside the machine body.

[0042] Next, the exhaust system of the engine E will be described mainly with reference to FIGS.

[0043] The exhaust gas from the engine E flows through an exhaust pipe 50, is purified by a DPF, which is an exhaust purification device, and then passes through a silencer 51 before being discharged from the rear of the aircraft through a tail pipe 52.

[0044] The silencer 51 is fixed to the upper part of a silencer support stay 51a whose base is fixed to the body frame 1, and the rear end of the exhaust pipe 50 is connected to the front side, and the base end of the rear pipe 50a is connected to the rear side.

[0045] The tail pipe 52 is positioned between the threshing device 6 and the storage hopper 30 in an inclined position with the rear of the machine body raised (positioned on the side closer to the threshing device 6 between the threshing device 6 and the storage hopper 30), its front end is connected to the rear end of the rear pipe 50a, its rear end is located rearward of the threshing device 6, storage hopper 30, backrest 41 and side carrier 32 and forward of the rear end of the machine body, and the upper end of the rear end is located lower than the upper end of the operator's seat 7a of the control unit 7.

[0046] Therefore, by discharging the exhaust gas from the engine E from a position rearward of the side carrier 32, even if the exhaust gas is blown away by the influence of wind or the like, it is less likely to be directed toward a worker working on the side carrier 32, making it easier for the worker to concentrate on his or her work.

[0047] Furthermore, by positioning the rear end of the tail pipe 52 forward of the rear end of the aircraft body, it is possible to prevent the fore-and-aft length of the aircraft body from becoming too long.

[0048] Furthermore, since the upper end of the tailpipe 52 is positioned lower than the upper end of the operator's seat 7a of the control unit 7, even if the exhaust is directed toward the front of the aircraft due to the wind direction, the components of the control unit 7 act as a wall, making it less likely that the operator will be affected by the heat.

[0049] Furthermore, the tail pipe 52 is not located directly behind the operator's seat 7a of the operating unit 7, but is positioned closer to the threshing device 6 when viewed from the front than the operator's seat 7a, making it less likely that the operator will be affected by heat.

[0050] In addition, a fuel tank guard 35a is provided below the fuel tank 35 located at the rear end of the aircraft, protruding further rearward than the fuel tank 35, and the rear end of the fuel tank guard 35a forms the rear end of the aircraft (the rear end of the tail pipe 52 is at approximately the same position as the rear end of the fuel tank 35, and is forward of the rear end of the fuel tank guard 35a).

[0051] In addition, the tail pipe 52 is positioned near the left-right center of the body and between the left and right sides of the threshing device 6 and the storage hopper 30, and its rear side is supported by a pipe support stay 54 fixed to the upper end of a T-shaped rear support frame 53 when viewed from behind the storage hopper 30.

[0052] Therefore, even if the tail pipe 52 is heated by the passage of exhaust gas, the storage hopper 30 acts as a wall, making it difficult for radiant heat to reach the worker working on the side carrier 32, preventing the worker from feeling unnecessary heat.

[0053] By supporting the rear side of the tail pipe 52 with a pipe support stay 54 provided on the rear support frame 53 of the storage hopper 30, the rear side of the tail pipe 52 can be prevented from moving up and down due to vibration of the machine body, thereby preventing damage to the tail pipe 52 and preventing disturbance in the exhaust direction.

[0054] The front portion of the tail pipe 52 is connected to the rear end of a rear pipe 50 a at the rear of a silencer 51 that is disposed further forward on the aircraft body than the tail pipe 52 .

[0055] A protective cover 55 for receiving impurities such as straw dust is provided on the upper part of the silencer 51, and the rear side of the protective cover 55 is positioned to cover the upper part near the connection between the rear pipe 50a and the tail pipe 52.

[0056] Therefore, by covering the silencer 51 and the area around the connection between the rear pipe 50a and the tail pipe 52 with the protective cover 55, it is possible to prevent impurities from accumulating near the hot silencer 51 or the area around the connection between the rear pipe 50a and the tail pipe 52, which could lead to fire.

[0057] The tail pipe 52 is provided with a pipe cover 56 that covers the top surface and the left and right sides, and a rear end 56a of the pipe cover 56 protrudes further rearward than the rear end 52a of the tail pipe 52 toward the aircraft body.

[0058] The rear end 56a of the pipe cover 56 is located forward of the rear end of the aircraft body.

[0059] A space 57 is formed between the pipe cover 56 and the tail pipe 52, and the pipe cover 56 is attached to the tail pipe 52 from the outside on the left and right sides with attachment members 58 such as bolts.

[0060] Therefore, the pipe cover 56 covers the top and sides of the tail pipe 52, and its rear end 56a is positioned further rearward of the aircraft than the rear end 52a of the tail pipe 52, so that the exhaust can be discharged rearward and downwardly of the aircraft, making it less likely for the exhaust to return to the aircraft.

[0061] By forming a space 57 between the tail pipe 52 and the pipe cover 56, even if the tail pipe 52 is heated by exhaust, the heat is not easily transferred to the pipe cover 56, so that it is possible to prevent impurities adhering to the pipe cover 56 from igniting.

[0062] In addition, between the threshing device 6 and the storage hopper 30, there is provided a grain conveying device (No. 1 grain lifting tube) 60 that conveys the threshed and sorted grains from the threshing device 6 to the storage hopper 30, and a return device (No. 2 screw) 61 that returns processed grains that could not be threshed and sorted back to the threshing and sorting path.

[0063] A clogging sensor 62, which is a rotary sensor that detects abnormalities such as clogging, is provided on the upper portion of the circulation device 61, and the outer periphery of the clogging sensor 62 is covered with a sensor cover 62a.

[0064] A front stay 63 that supports the front side of the tail pipe 52 is fixed to the grain conveying device 60, and the front stay 63 is disposed in a position that covers the upper part of the sensor cover 62a.

[0065] Therefore, the front stay 63 and the sensor cover 62a can prevent impurities from clogging and interfering with the detection of the sensor 62, thereby preventing a false detection of a blockage and interruption of work even when the return of processed material to the threshing device 6 is proceeding normally.

[0066] A control section sun visor 70 is provided above the control section 7, and a recovery section sun visor 71 is provided above the side carrier 32.

[0067] <Other embodiments>

[0068] (1) A single-portion storage hopper equipped with one funnel portion may be added to the rear of the two front and rear funnel portions 30a of the storage hopper 30 in the above embodiment, to form a configuration with three front and rear funnel portions 30a.

[0069] The side carrier 32 is extended rearward to form an L-shape that reaches the rear of the added single-port storage hopper, and the added rearmost funnel section is configured to discharge grains to the rear of the machine body, and a rice bag is placed at the rear of the added single-port storage hopper to collect grains.

[0070] Even if the side carrier 32 is extended rearward with the three front and rear funnel portions 30a, it does not protrude rearward from the rear end of the fuel tank 35.

[0071] In addition, a viewing window can be installed on the rear surface of the newly added single-port storage hopper at the rear, allowing the amount of storage to be checked, making work easier.

[0072] Furthermore, if a rear guard is provided behind the added rearmost single-port storage hopper, it will act as a safety guard for the worker who collects grain from the rearmost single-port storage hopper into a chaff bag, allowing for safe work.

[0073] The rear guard is located at the rear end of the machine and can be freely switched between a working state in which it is lowered behind the operator's working position to ensure safety, and a stored state in which it is moved above the machine to function as a guard for the rear end of the machine.

[0074] (2) Figures 9 and 10 show a grain tank type combine harvester in which the storage hopper 30 is replaced with a storage tank 30.

[0075] The tail pipe 52 is disposed between the threshing device 6 and the storage tank 30 on the side closer to the storage tank 30.

[0076] The front of the tail pipe 52 is positioned on the same line as the first and second grain lifting tubes when viewed from above and from behind, and has a curved shape that bypasses the first and second grain lifting tubes, with the rear end of the tail pipe 52 facing upward for exhaust.

[0077] Therefore, the tail pipe 52 is positioned between the threshing device 6 and the storage tank 30, closer to the storage tank 30, so that the distance between the tail pipe 52 and the inner surface of the threshing device 6 is widened, preventing the accumulation of straw dust and mitigating the thermal impact on the inner surface of the threshing device 6.

[0078] In addition, a large-capacity L-shaped fuel tank 35 is provided at the rear right position of the aircraft in a plan view.

[0079] The fuel tank 35 is arranged so as to cover the rear and right side of the vertical conveying cylinder 80a of the discharge auger 80 that discharges the grains in the storage tank 30 to the outside of the machine.

[0080] The fuel tank 35 is configured so that its right side does not protrude beyond the right side of the storage tank 30, and its rear side does not protrude beyond the rear end of the vehicle frame 1.

[0081] The fuel tank 35 is disposed so as not to overlap with the left and right traveling devices 3, 3 in a plan view.

[0082] Therefore, the fuel tank 35 has a large capacity, is easy to supply fuel to, and is conveniently shaped and positioned to improve the balance of the aircraft.

[0083] The discharge auger 80 rotates at its tip end around the vertical conveying tube 80a' as the center of rotation between a storage position (the state shown in Figure 9) and a discharge position where it discharges grains outside the machine. An auger storage position detection sensor 85a and an auger discharge position detection sensor 85b are provided on the inner surface of the L-shaped fuel tank 35 to detect the rotational position of the vertical conveying tube 80a' and thereby determine whether the discharge auger 80 is in the storage position, and to detect whether the discharge auger 80 is in the discharge position.

[0084] (3) FIG. 11 shows a remote control 90 for the discharge auger 80.

[0085] The remote control 90 is placed near the operator's seat 7a so that the operator can operate the remote control 90 while sitting in the operator's seat 7a (in the case of a cabin specification, it is placed inside the cabin).

[0086] The remote controller 90 is provided with an extension button 80a, a storage button 80b, and a stop button 80c for operating the automatic extension function of the discharge auger 80, which are used when the discharge auger 80 is operated for the first time.

[0087] When the extension button 80a is pressed, the discharge auger 80 is automatically rotated from the storage position to the discharge position, when the storage button 80b is pressed, the discharge auger 80 is automatically rotated from the discharge position to the storage position and stored, and when the stop button 80c is pressed, the discharge auger 80 stops during automatic movement.

[0088] The extension button 80a, the storage button 80b and the stop button 80c are provided with backlights 81 that light up in conjunction with turning on the headlights in the evening or at night.

[0089] Therefore, if the entire remote control 90 is backlit and bright, it may be too bright and difficult to see outside, which would interfere with work (especially in the case of a cabin model, the light is reflected on the windshield and makes it difficult to see outside), but the backlight 81 is only lit for the extension button 80a, storage button 80b and stop button 80c, which operate the automatic extension function, which is the first operation of the discharge auger 80 by operating the remote control 90 in the evening or at night when the headlights are on, so operation is easy and the outside is not difficult to see and does not interfere with work.

[0090] In addition, when the headlights are turned on, the backlight 81 may be turned on dimly in conjunction with the turning on of the headlights, and may be turned on brightly for a certain period of time when the extension button 80a, the storage button 80b or the stop button 80c is operated.

[0091] In addition, the individual backlights of the auger up button 80d, auger down button 80e, auger left button 80f, auger right button 80g and zoom button 80h on the auger switch panel, which manually operate the discharge auger 80 up and down and left and right, other than the extension button 80a, storage button 80b and stop button 80c which operate the automatic extension function, may be lit, and the control device may automatically light up depending on the conditions to improve workability.

[0092] For example, when the discharge auger 80 is located above the cabin or the storage tank 30, the backlight of the auger below button 80e is not turned on.

[0093] In addition, a low-speed discharge button 80i is provided, and when the low-speed discharge button 80i is pressed, the rotation speed of the engine E is switched to low speed, thereby slowing down the discharge speed.

[0094] In addition, each button 80a to 80i may be equipped with a light, and the control device may turn on the light of the button 80a to 80i indicating the direction and state in which the discharge auger 80 is operating, so that the direction and state in which the discharge auger 80 is operating can be recognized even when the discharge auger 80 is not visible to the operator. [Explanation of symbols]

[0095] 3 Running gear 5 Reaping device 6. Threshing equipment 7 Control Unit 30 Storage hopper 32 Side carrier 50a rear pipe 51 silencer 52 tailpipe 52a Rear end of tailpipe 53 Rear support frame 54 Pipe support stay 55 Protective cover 56 Pipe cover 56a Rear end of pipe cover 57 Space part 58 Mounting material 60 Grain conveying device 61 Reflux device 62 Clogging sensor 62a Sensor cover 63 Front stay E-Engine

Claims

1. A combine harvester is provided with a harvesting device (5), a threshing device (6), and a storage hopper (30) on a body having an engine (E), running devices (3, 3), and a control section (7), and is equipped with a side carrier (32) on which an operator rides outside the storage hopper (30), characterized in that the rear end of a tail pipe (52) that guides exhaust from the engine (E) to the rear of the body is positioned rearward of the body from the threshing device (6), the storage hopper (30), and the side carrier (32) and forward of the rear end of the body, and the upper end of the rear end of the tail pipe (52) is positioned lower than the upper end of the control section (7).

2. A combine harvester as described in claim 1, characterized in that the tail pipe (52) is arranged near the left-right center of the body and between the left and right sides of the threshing device (6) and the storage hopper (30), and the rear side of the tail pipe (52) is supported by a pipe support stay (54) provided on a rear support frame (53) of the storage hopper (30).

3. A combine harvester as described in claim 1 or claim 2, characterized in that the front part of the tail pipe (52) is connected to a rear pipe (50a) at the rear of a silencer (51) positioned further forward on the body than the tail pipe (52), a protective cover (55) for receiving impurities such as straw dust is provided on the upper part of the silencer (51), and the rear side of the protective cover (55) is positioned to cover the upper part near the connection between the rear pipe (50a) and the tail pipe (52).

4. A combine harvester as described in claim 1 or claim 2, characterized in that a pipe cover (56) is provided on the tail pipe (52) to cover the top surface and left and right side surfaces, the rear end (56a) of the pipe cover (56) protrudes further rearward than the rear end (52a) of the tail pipe (52), a space (57) is formed between the pipe cover (56) and the tail pipe (52), and the pipe cover (56) is attached to the tail pipe (52) from the outside with an attachment member (58).

5. A combine harvester according to claim 1 or 2, characterized in that a grain conveying device (60) for conveying threshed and sorted grains from the threshing device (6) to the storage hopper (30) and a return device (61) for returning processed grains that could not be threshed and sorted to the threshing and sorting path are provided between the threshing device (6) and the storage hopper (30), a clogging sensor (62) for detecting abnormalities such as clogging is provided on the upper part of the return device (61), a sensor cover (62a) is provided to cover the outer periphery of the clogging sensor (62), a front stay (63) for supporting the front side of the tail pipe (52) is provided on the grain conveying device (60), and the front stay (63) is positioned to cover the upper part of the sensor cover (62a).

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