Combine harvester

Abstract

A discharge auger (8) is formed by a vertical discharge part (8A) extending in the vertical direction and a horizontal discharge part (8B) extending forward from the upper part of the vertical discharge part (8A), the front part of the horizontal discharge part turning in the vertical and horizontal directions. A restricting member (50) that restricts the turning of the horizontal discharge part (8B) is provided on the upper wall of a grain tank (7). The restricting member (50) is fixed to the grain tank (7) via a support member (50D) for mounting reinforcement, thereby making it possible to firmly support the restricting member (50) that restricts the turning of the horizontal discharge part (8B).

Description

combine

[0001] The present invention relates to a combine harvester equipped with a discharge auger that discharges grain stored in a grain tank to the outside.

[0002] A conventional technique is known in which a discharge auger for discharging grain stored in a grain tank to the outside is formed by a vertical discharge section that extends vertically behind the grain tank and rotates around an axis, a horizontal discharge section that extends forward from the top of the vertical discharge section and whose front section moves up and down, and a discharge section that discharges grains in front of the horizontal discharge section (Patent Document 1).

[0003] Japanese Patent Application Laid-Open No. 2001-169652

[0004] The technique disclosed in Patent Document 1 provides a restricting portion that restricts the operating range for the rotation of the horizontal discharge auger.

[0005] This restricting portion is attached to the machine body in a cantilevered manner, so if the discharge auger facing sideways collides with the restricting portion while rotating at high speed, the restricting portion may be deformed.

[0006] Therefore, a main object of the present invention is to propose a combine harvester in which a regulating section that regulates the operating range for the rotation of the lateral discharge auger is firmly attached to the machine body.

[0007] The present invention, which has solved the above-mentioned problems, is as follows: That is, the invention described in claim 1 relates to a combine harvester having a pre-harvesting treatment device (3) for harvesting stalks provided in front of a machine frame (1), a threshing device (4) provided on the rear left side of the pre-harvesting treatment device (3), a steering unit (5) provided on the rear right side of the pre-harvesting treatment device (3), a grain tank (7) for storing threshed grains provided behind the steering unit (5), and a discharge auger (8) for discharging the grains from the grain tank (7) to the outside, wherein the discharge auger (8) is formed of a vertical discharge section (8A) extending in the vertical direction and a horizontal discharge section (8B) extending forward from an upper portion of the vertical discharge section (8A) and having a front portion that rotates in the vertical and left-right directions, and a restricting member (50) for restricting the rotation of the horizontal discharge section (8B) is provided on the upper wall of the grain tank (7). The combine harvester is characterized in that the regulating member (50) is fixed to the grain tank (7) via a support member (50D) for reinforcing the mounting.

[0008] According to the invention described in claim 1, the regulating member (50) that regulates the rotation of the lateral discharge portion (8B) is fixed to the grain tank (7) via a support member (50D) that reinforces the attachment, thereby making the support structure of the regulating member (50) strong.

[0009] According to the invention described in claim 2, the regulating member (50) that regulates the rotation of the lateral discharge portion (8B) is fixed to the lateral frame (47) extending in the left-right direction at the rear of the grain tank (7), thereby making the support structure of the regulating member (50) strong.

[0010] According to the third aspect of the present invention, the lateral discharge portion (8B) is prevented from passing through a specific space around the cockpit (5A) by the restricting member (50).

[0011] This prevents the side discharge section (8B) from coming into contact with the operator or components around the cockpit (5A).

[0012] 1 is a perspective view of a combine harvester of a first embodiment as seen from the rear left side. FIG. 2 is a front view of the combine harvester. FIG. 3 is a right view of the combine harvester. FIG. 4 is a plan view of the combine harvester. FIG. 5 is a rear view of the combine harvester. FIG. 6 is a rear view of the main parts of the combine harvester with the sun visor moved upward. FIG. 7 is a longitudinal cross-sectional view of the threshing device in the front-to-rear direction. FIG. 8 is a perspective view of the connecting part of the discharge auger as seen from the rear right side. FIG. 9 is a plan view of the connecting part of the discharge auger. FIG. 10 is a perspective view of the regulating member of the first embodiment as seen from the rear left side. FIG. 11 is a perspective view of the regulating member as seen from the rear left side. FIG. 12 is a perspective view of the regulating member as seen from the rear left side. FIG. 13 is a perspective view of the first regulating member as seen from the rear left side. FIG. 14 is a perspective view of the regulating member with the regulating part and the base separated as seen from the rear left side. FIG. 15 is a perspective view of the second regulating member as seen from the rear left side. FIG. 16 is a plan view of the main parts of the combine harvester. FIG. 17 is a plan view of a combine harvester with the vertical discharge part of the discharge auger rotated clockwise. FIG. 18 is a right-side view of a combine harvester with the front part of the horizontal discharge part of the discharge auger moved upward. FIG. 19 is a front view of a combine harvester of a second embodiment. FIG. 1 is a front view of a combine harvester of a third embodiment. FIG. 2 is a perspective view of the lower part of the vertical discharge section of the discharge auger, viewed from the upper left side. FIG. 3 is a rear view of the lower part of the vertical discharge section of the discharge auger. FIG. 4 is a plan view of the vertical discharge section of the discharge auger. FIG. 5 is a perspective view of the vertical discharge section and horizontal discharge section of the discharge auger, viewed from the rear right side. FIG. 6 is a perspective view of a regulating member that regulates movement of the discharge auger, viewed from the front right side. FIG. 7 is a perspective view of the regulating member, viewed from the upper right side. FIG. 8 is an explanation of the movement range of the discharge auger.

[0013] As shown in Figures 1 to 5, the general-purpose combine harvester of the first embodiment has a traveling device 2 consisting of a pair of left and right crawlers that travels on the soil surface on the underside of the body frame 1, a pre-harvesting processing device 3 that harvests grain stalks in the field on the front side of the body frame 1, a threshing device 4 that threshers and sorts the harvested grain stalks on the rear left side of the pre-harvesting processing device 3, and a control unit 5 on which an operator sits on the rear right side of the pre-harvesting processing device 3.

[0014] An engine room 6 that houses the engine is provided below the control unit 5, a grain tank 7 that stores threshed and sorted grain is provided behind the control unit 5, and a discharge auger 8 that discharges the grain to the outside is provided behind the grain tank 7.

[0015] The pre-harvest processing device 3 is composed of a raking device 3A that transports the stalks in the field to the rear while raising them upright, a cutting blade device 3B that cuts the base of the stalks transported to the rear lower part of the raking device 3A, an auger device 3C that gathers the stalks transported to the rear of the raking device 3A to the left side, and a feeder house 3D that transports the gathered stalks to the threshing device 4.

[0016] The discharge auger 8 is composed of a vertical discharge section 8A equipped with a conveying spiral extending vertically on the rear side of the grain tank 7, a horizontal discharge section 8B equipped with a conveying spiral extending from the top of the vertical discharge section 8A toward the front left side, and a discharge section 8C at the front end of the horizontal discharge section 8B that discharges grains.

[0017] A sun visor 30 is provided above the control section 5. This can protect the operator of the control section 5 from direct sunlight and rainwater.

[0018] As shown in Figure 6, the sun visor 30 is supported so as to be movable in the vertical direction by a support member 31 extending in the vertical direction and provided on the front wall of the grain tank 7. This allows the installation position of the sun visor 30 to be adjusted to suit the physique of the worker.

[0019] As shown in FIG. 7, the threshing device 4 is formed of a threshing chamber 10 for threshing stalks and a sorting chamber 20 for sorting the threshed grains.

[0020] A threshing drum 11 for threshing the stalks transported from the feeder house 3D is installed on the front and rear walls of the threshing chamber 10, and a receiving net 12 formed in a semicircular arc along the lower outer periphery of the threshing drum 11 is provided below the threshing drum 11. The top of the threshing drum 11 is covered with an openable threshing drum cover 13, and a dust conveying plate is provided on the inner periphery of the threshing drum cover 13 to guide the stalks to the rear of the threshing chamber 10. The threshing drum 11 is supported by a rotor shaft 14 extending in the front-to-rear direction.

[0021] An oscillating sorting device 21 is provided above the sorting chamber 20 to sort the grains leaking from the handling chamber 10. Below the oscillating sorting device 21, there are provided, in order from the front, a winnower 25 that blows sorting air into the oscillating sorting device 21, a wind divider 26 that changes the blowing direction of the sorting air behind the winnower 25, a first spiral 27 that transports the grains leaking from the oscillating sorting device 21 to the grain tank 7, and a second spiral 28 that re-transports grains with attached rachis branches and broken stalks that leak from the rear of the oscillating sorting device 21 to the sorting shelf at the front of the oscillating sorting device 21.

[0022] 5 and other figures, a protective cover 36 is provided below the vertical discharge portion 8A of the discharge auger 8 to cover an electric motor 35 (not shown) that rotates a gear formed on the outer periphery of the vertical discharge portion 8A. This allows the electric motor 35 to rotate the vertical discharge portion 8A clockwise or counterclockwise when viewed from the axis extending in the up-down direction of the vertical discharge portion 8A.

[0023] 8 and 9, the upper part of the vertical discharge section 8A of the discharge auger 8 and the rear part of the horizontal discharge section 8B are connected via a connecting part 40. The connecting part 40 is formed of a right connecting part 40A extending upward and left from the upper part of the vertical discharge section 8A, a left connecting part 40B extending rearward and right from the rear part of the horizontal discharge section 8B, and a connecting member 40C that rotatably connects the left part and the right part of the left connecting part 40B to the right connecting part 40A.

[0024] A substantially L-shaped suspension member 41 is provided on the right side of the rear of the lateral discharge section 8B. The suspension member 41 is formed of left and right suspension sections 41A extending rightward from the lateral discharge section 8B, and front and rear suspension sections 41B extending rearward from the right portions of the left and right suspension sections 41A.

[0025] Cylinders 42 that raise and lower the front portion of the lateral discharge section 8B are provided at the middle portion of the left and right suspension sections 41A and at the front portion of the upper portion of the vertical discharge section 8A. The rear portions of the front and rear suspension sections 41B are rotatably supported by pins 43 extending rightward from the right connecting section 40A. As a result, when the rod of the cylinder 42 is extended, the left connecting section 40B rotates counterclockwise when viewed from the axis of the connecting section 40 extending left and right, thereby raising the front portion of the lateral discharge section 8B. On the other hand, when the rod of the cylinder 42 is retracted, the left connecting section 40B rotates clockwise when viewed from the axis of the connecting section 40 extending left and right, thereby lowering the front portion of the lateral discharge section 8B.

[0026] As shown in Figures 10 to 12, the upper part of the vertical discharge section 8A is rotatably fitted into a support member 45, and the front part of the support member 45 is fixed to a vertical frame 46 extending vertically from the machine frame 1.

[0027] A horizontal frame 47 extending in the left-right direction is fixed to the upper part of the vertical frame 46. The left part of the horizontal frame 47 is connected to the right wall of the threshing device 4, and the horizontal frame 47 is detachably connected to the rear wall of the grain tank 7 by connecting members such as bolts. This allows the connection between the horizontal frame 47 and the rear wall of the grain tank 7 to be released, and the front part of the grain tank 7 to be moved to the right side of the machine frame 1 around a rotating support shaft (not shown) erected on the rear side of the grain tank 7 on the machine frame 1, placing it in an open position, making it easy to perform maintenance on the grain tank 7.

[0028] In this embodiment, the upper parts of the horizontal frame 47 and the vertical frame 46 are fixed, and the horizontal frame 47 and the rear wall of the grain tank 7 are detachably connected, but the upper parts of the horizontal frame 47 and the vertical frame 46 can also be detachably connected to fix the horizontal frame 47 and the rear wall of the grain tank 7, or the upper parts of the horizontal frame 47 and the vertical frame 46 can be spaced a predetermined distance apart to fix the horizontal frame 47 and the rear wall of the grain tank 7.

[0029] In rear view, a restricting member 50 that restricts the rotation of the horizontal discharge section 8B is provided on the left side of the vertical discharge section 8A on the horizontal frame 47. The restricting member 50 is formed of a base 51 fixed to the horizontal frame 47 and a restricting part 52 made of pipe steel or round steel that is connected to the upper part of the base 51.

[0030] When the connection between the horizontal frame 47 and the rear wall of the grain tank 7 is released and the grain tank 7 is opened to the side of the aircraft, the regulating member 50 does not move, so even if the discharge auger 8 is rotated when the grain tank 7 is open, the horizontal discharge section 8B does not pass through a specific virtual space around the cockpit 5A. This prevents inadvertent contact between the horizontal discharge section 8B and the pilot or peripheral components of the cockpit 5A during inspection. In addition, because the regulating member 50 is provided on the horizontal frame 47 on the rear side of the grain tank 7, maintenance of the regulating member 50 can be easily performed.

[0031] The regulating portion 52 is formed from a first extension portion 52A that extends upward from the base 51 along the rear wall of the grain tank 7 and then curves forward, a second extension portion 52B that extends forward from the front end of the first extension portion 52A along the upper wall of the grain tank 7, and a third extension portion 52C that extends upward from the front end of the second extension portion 52B.

[0032] The third extending portion 52C is disposed near the pivot point for the lifting and lowering of the lateral discharge portion 8B, thereby making it possible to reduce the vertical height of the third extending portion 52C.

[0033] <Regulating member of first embodiment> As shown in Figures 13 and 14, the regulating member 50 is formed from a base portion 51 and a regulating portion 52, and the regulating portion 52 is formed from a first extending portion 52A, a second extending portion 52B, and a third extending portion 52C.

[0034] By changing the shapes of the first extension portion 52A, the second extension portion 52B, and the third extension portion 52C, the range in which the rotation of the lateral discharge portion 8B is restricted can be set as desired. That is, by changing the shape (part change) of the restricting member 50, it can be set so that the lateral discharge portion 8B does not pass through a specific virtual space around the cockpit 5A of the control unit 5. As a result, the lateral discharge portion 8B of the discharge auger 8 does not pass through the specific virtual space around the cockpit 5A, preventing contact with the operator or components surrounding the cockpit 5A, and allowing the lateral discharge portion 8B of the discharge auger 8 to move above the cockpit 5A and shortening the discharge time.

[0035] An opening 51A is formed in the upper part of the base 51, into which the lower parts of the pair of left and right first extension parts 52A of the restricting part 52 are inserted, and a fixing member 51B is formed in the upper part of the rear surface of the base 51. The fixing member 51B detachably fixes the mounting member 53, which extends rearward from the lower part of the first extension part 52A, with a fastening part such as a bolt. This allows the first extension part 52A of the restricting part 52 to be firmly fixed to the upper part of the base 51.

[0036] The front portions of the pair of left and right first extension portions 52A of the restricting portion 52 and the lower portion of the second extension portion 52B are connected by a reinforcing member 54 such as a rib. This makes it possible to prevent large deformation of the second extension portion 52B even if the discharge auger 8 collides with the third extension portion 52C and a large external force acts on the third extension portion 52C when the discharge auger 8 is stored.

[0037] A protective member 55 is provided on the upper portion of the pair of left and right second extension portions 52B, extending from the second extension portion 52B to the right along the upper wall of the grain tank 7. This prevents contact between the upper wall of the grain tank 7 and the lateral discharge portion 8B of the discharge auger 8.

[0038] The third extension portion 52C is formed from a left leg extending upward from the front end of the second extension portion 52B on the left side, a right leg extending upward from the front end of the second extension portion 52B on the right side, and a connecting portion connecting the upper parts of the left leg and the right leg.

[0039] The left and right legs are formed at the same height, and the connecting portion is formed in a roughly semicircular arc shape. A horizontal portion parallel to the upper wall of the grain tank 7 is formed in the center of the connecting portion. This allows the rotational torque of the electric motor 35 that moves the lateral discharge portion 8B to the left along the connecting portion to be roughly the same as the rotational torque of the electric motor 35 that moves it to the right, making it possible to use a smaller electric motor 35 than conventionally. In this specification, the "storage position" of the discharge auger 8 refers to a position in which the front portion of the lateral discharge portion 8B is placed on the receiving platform 4A provided on the upper wall of the threshing device 4.

[0040] When the discharge auger 8 is stored in the receiving base 4A, a predetermined gap is provided between the lateral discharge portion 8B and the regulating member 50. This prevents problems such as deformation caused by load acting on the regulating member 50 or the member supporting the regulating member 50.

[0041] 15 and 16 show a restricting member according to a second embodiment. The same components as those in the restricting member according to the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

[0042] As shown in Figures 15 and 16, the regulating member of the second embodiment is formed from a base 51 and a regulating portion 52, and the regulating portion 52 is formed from a first extension portion 52A formed by bending a plate-shaped member into an approximately L-shape, and a second extension portion 52B and a third extension portion 52C made of pipe steel or round steel.

[0043] A step (not shown) into which the lower end of the first extending portion 52A of the restricting portion 52 fits is formed on the upper part of the base 51, and a fixing member 51B is formed on the upper part of the rear surface of the base 51. The fixing member 51B detachably fixes the mounting member 53, which extends rearward from the lower part of the first extending portion 52A, with a fastening part such as a bolt. This allows the first extending portion 52A of the restricting portion 52 to be firmly fixed to the upper part of the base 51.

[0044] Both side portions of the upper plate and rear plate of the first extension portion 52A are connected by reinforcing members 54, which are plate-like members formed into a generally L-shape, and the pair of left and right second extension portions 52B are fixed to the underside of the upper plate of the first extension portion 52A at a predetermined interval in the left-right direction. This prevents large deformation of the second extension portions 52B even if the discharge auger 8 collides with the third extension portion 52C and a large external force acts on the third extension portion 52C when the discharge auger 8 is stored.

[0045] The third extension portion 52C is formed from a left leg extending upward from the front end of the second extension portion 52B on the left side, a right leg extending upward from the front end of the second extension portion 52B on the right side, and a connecting portion connecting the upper parts of the left leg and the right leg.

[0046] The left and right legs are formed to the same height, and the connecting portion is formed in a roughly semicircular arc shape. In addition, a horizontal portion is formed in the center of the connecting portion that is parallel to the upper wall of the grain tank 7. This allows the electric motor 35 that rotates the vertical discharge portion 8A to be changed to a smaller electric motor 35 than conventional ones.

[0047] As shown in FIG. 17, the connecting portion of the third extension portion 52C of the regulating member 52 is preferably set at a predetermined intersection angle with the lateral discharge portion 8B, i.e., the front intersection angle is preferably set at a right angle, e.g., 60 to 90 degrees, and the rear intersection angle is preferably set at a right angle, e.g., 120 to 90 degrees. Furthermore, the connecting portion 50C (see FIG. 27) of the regulating member 50 is preferably set at a right angle, so that the front intersection angle is a right angle, and the rear intersection angle is also a right angle. Furthermore, the left leg of the third extension portion 52C is provided proximal to the lateral discharge portion 8B, and the right leg is provided distal to the lateral discharge portion 8B. This allows the lateral discharge portion 8B to be moved from right to left along the upper portion of the connecting portion of the third extension portion 52C, making it easier to move the discharge auger 8 to the storage position.

[0048] 18 , in a plan view, the left part of the left leg of the third extension part 52C is provided on an imaginary line M where the vertical discharge part 8A of the discharge auger 8 rotates and the axis extending in the front-to-rear direction of the lateral discharge part 8B comes into contact with the left side of the rear part of the sun visor 30. This makes it possible to prevent the lateral discharge part 8B from colliding with the sun visor 30 when the vertical discharge part 8A is rotated and the lateral discharge part 8B is rotated clockwise.

[0049] 19 , in a side view, the upper end of the left leg of the third extension portion 52C extends above the axis extending in the left-right direction of the left connecting portion 40B, i.e., above an imaginary line L that passes through a straight line extending in the left-right direction passing through the center of the connecting member 40C and the upper end of the rear portion of the sun visor 30. Note that the sun visor 30 in FIG. 19 is shown in a state in which it is moved to the uppermost position of the support member 31. This prevents the lateral discharge portion 8B from colliding with the sun visor 30 when the lateral discharge portion 8B is rotated clockwise when viewed from the axis extending in the up-down direction of the vertical discharge portion 8A of the discharge auger 8 after the front portion of the lateral discharge portion 8B is raised from the storage position.

[0050] When the grain tank 7 becomes full of grain, the discharge auger 8 is placed in the storage position and the traveling device 2 is driven to move toward a discharge point located on the outer periphery of the field, and then the electric motor 35 and cylinder 42 are driven to raise and rotate the discharge auger 8, moving the discharge section 8C located in front of the lateral discharge section 8B of the discharge auger 8 above the truck bed to discharge the grain.

[0051] <Combine Harvester of Second Embodiment> A combine harvester of a second embodiment is shown in Fig. 20. Note that the same parts as those of the combine harvester of the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

[0052] 20 , the combine harvester of the second embodiment does not have a sun visor 30 above the steering unit 5. In this case, the left portion of the left leg of the third extension 52C of the restricting portion 52 is formed on an imaginary line M that passes through an axis extending in the front-rear direction of the lateral discharge unit 8B and the left portion of the backrest of the driver's seat 5A of the steering unit 5, and the upper end of the right leg of the third extension 52C is formed to extend above an imaginary line L that passes through an axis extending in the left-right direction of the left connecting portion 40B and the upper end of the backrest of the driver's seat 5A of the steering unit 5. This prevents the lateral discharge unit 8B from colliding with the backrest of the driver's seat 5A when the front portion of the lateral discharge unit 8B is raised from the storage position and then the lateral discharge unit 8B is rotated clockwise when viewed from the axis extending in the up-down direction of the vertical discharge unit 8A of the discharge auger 8. It is also possible to form the shape of the restricting member 50 so that it does not pass through a specific virtual space around the cockpit 5A, without specifying a component that constitutes the cockpit 5A, such as a seat back.

[0053] <Combine Harvester of Third Embodiment> A combine harvester of a third embodiment is shown in Fig. 21. Note that the same parts as those of the combine harvester of the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

[0054] 21 , the steering section 5 of the combine harvester of the third embodiment is covered by a cabin 32 having a generally rectangular parallelepiped shape formed by front and rear walls, left and right walls, and a top wall. In this case, the left portion of the left leg of the third extension portion 52C of the restricting portion 52 is formed on an imaginary line M that passes through the axis extending in the front-rear direction of the lateral discharge portion 8B and the left side of the rear of the cabin 32, and the upper end of the right leg of the third extension portion 52C is formed to extend above an imaginary line L that passes through the axis extending in the left-right direction of the left connecting portion 40B and the upper end of the rear of the cabin 32. This prevents the lateral discharge portion 8B from colliding with the cabin 32 when the lateral discharge portion 8B is rotated clockwise from the axis extending in the up-down direction of the vertical discharge portion 8A of the discharge auger 8 after the front portion of the lateral discharge portion 8B is raised from the storage position.

[0055] 22 to 24, an electric motor 70 for rotating the vertical discharge section 8A is provided on the left side of the vertical discharge section 8A. The electric motor 70 is fixed via a stay 71 to the vertical frame 22 extending upward from the machine frame 1 and to the auger metal 23 that connects the vertical discharge section 8A to a conveying spiral section (not shown) for conveying grain provided at the bottom of the grain tank 7.

[0056] The lower part of the vertical discharge section 8A is rotatably fixed to the auger metal 23, and a gear 20A attached to the output shaft of the electric motor 70 is engaged with a gear 24 formed on the outer periphery of the vertical discharge section 8A. This allows the electric motor 70 to be driven to rotate the vertical discharge section 8A around an axis extending in the vertical direction.

[0057] A sensor 72A that restricts clockwise rotation of the vertical discharge section 8A and a sensor 72B that restricts counterclockwise rotation of the vertical discharge section 8A are provided above the electric motor 70. When the vertical discharge section 8A rotates clockwise by a predetermined amount or more, a signal input from the sensor 72A to the controller turns ON, and driving of the electric motor 70 is stopped. When the vertical discharge section 8A rotates counterclockwise by a predetermined amount or more, a signal input from the sensor 72B to the controller turns ON, and driving of the electric motor 70 is stopped. This restricts the range of rotation of the discharge auger 8 when viewed from the axis of the vertical discharge section 8A, making it possible to prevent collision with the outside.

[0058] Sensor 72A is attached to the lower surface of a stay 73 having a U-shaped cross section so as to be movable in the circumferential direction, and sensor 72B is attached to the upper surface of the stay 73 so as to be movable in the circumferential direction, and the stay 73 is fixed to the vertical frame 22. This makes it possible to easily adjust the range of rotation of the discharge auger 8 by moving sensors 72A and 72B in the circumferential direction. In this specification, sensors 72A and 72B are collectively referred to as sensors 72. Furthermore, a fuel tank 74 that stores diesel fuel to be supplied to the engine is disposed to the left of the electric motor 70.

[0059] 25 and 26 , the upper part of the vertical discharge section 8A and the rear part of the horizontal discharge section 8B are connected via a connecting part 40. The connecting part 40 is formed of a right connecting part 40A extending upward and left from the upper part of the vertical discharge section 8A, a left connecting part 40B extending rearward and right from the rear part of the horizontal discharge section 8B, and a connecting member 40C that rotatably connects the left part of the right connecting part 40A and the right part of the left connecting part 40B.

[0060] A substantially L-shaped suspension member 41 is provided at the rear right side of the lateral discharge section 8B. The suspension member 41 is formed of left and right suspension sections 41A extending rightward from the lateral discharge section 8B, and front and rear suspension sections 41B extending rearward from the right portions of the left and right suspension sections 41A.

[0061] Cylinders 42 that raise and lower the front portion of the lateral discharge section 8B are provided at the middle portions of the left and right suspension sections 41A and at the upper front portion of the vertical discharge section 8A. The rear portions of the front and rear suspension sections 41B are rotatably supported by pins 43 extending rightward from the right connecting section 40A. As a result, when the rod of the cylinder 42 is extended, the left connecting section 40B rotates counterclockwise when viewed from the axis extending in the left-right direction of the connecting section 40A, causing the front portion of the lateral discharge section 8B to rise. On the other hand, when the rod of the cylinder 42 is retracted, the left connecting section 40B rotates clockwise when viewed from the axis extending in the left-right direction of the connecting section 40A, causing the front portion of the lateral discharge section 8B to fall.

[0062] A restricting member 50 for restricting the movement of the lateral discharge section 8B is provided on the right side of the rear of the upper wall of the grain tank 7. The restricting member 50 is preferably disposed close to the left and right suspension sections 41A. This allows the vertical height of the restricting member 50 to be reduced.

[0063] The regulating member 50 is fixed to the support member 50D by welding, and the support member 50D is detachably fixed to the upper wall of the grain tank 7 by fastening means such as bolts. When the discharge auger 8 is moved to the storage position, the lateral discharge portion 8B gains momentum, and a large impact is generated when it collides with the regulating member 50. Therefore, it is preferable to increase the thickness of the support member 50D or to form a reinforcing rib on the inner surface of the upper wall of the grain tank 7 to which the support member 50D is fixed for reinforcement.

[0064] As shown in FIG. 27 , the restricting member 50 is formed of a left leg 50A extending vertically, a right leg 50B extending vertically, and a connecting portion 50C connecting the upper portions of the left leg 50A and right leg 50B. The height of the upper end of the right leg 50B is formed lower than the height of the upper end of the left leg 50A, and the upper portion of the connecting portion 50C is formed to slope downward to the right from the left leg 50A to the right leg 50B. This allows the lateral discharge portion 8B to move from the right side of the connecting portion 50C along the upper portion of the connecting portion 50C to the left side of the connecting portion 50C, making it easy to move the discharge auger 8 to the retracted position. Furthermore, when the discharge auger 8 is retracted, the lateral discharge portion 8B abuts against the sloped portion of the connecting portion 50C even when it is moving with momentum, thereby reducing impact.

[0065] The connecting portion 50C of the restricting member 50 is preferably set at a predetermined intersection angle with the lateral discharge portion 8B, i.e., the front intersection angle is set at an angle between an acute angle and a right angle, for example, 60 to 90 degrees, and the rear intersection angle is set at an angle between an obtuse angle and a right angle, for example, 120 to 90 degrees, and it is even more preferable to set the front intersection angle at 90 degrees and the rear intersection angle at 90 degrees. This allows the lateral discharge portion 8B to be moved from right to left along the top of the connecting portion 50C, making it easy to move the discharge auger 8 to the storage position.

[0066] As shown in Figure 28, when viewed from the axis of the vertical discharge section 8A, the horizontal discharge section 8B in the storage position is set as the reference rotation angle of 0 degrees, and the vertical discharge section 8A can rotate in a region A of 45 to 240 degrees clockwise and in a region C of 0 to 70 degrees counterclockwise.

[0067] Meanwhile, based on the signals from sensors 72A and 72B, the rotation of vertical discharge section 8A in the clockwise direction is restricted to 240 to 290 degrees or the counterclockwise direction to 70 to 120 degrees in region B, and if the front part of lateral discharge section 8B is not raised above a predetermined level, the rotation of lateral discharge section 8B in the clockwise direction is restricted to region D of 0 to 45 degrees by restricting member 50. This makes it possible to prevent lateral discharge section 8B from colliding with the outside, and also makes it possible to prevent lateral discharge section 8B from colliding with sun visor 30.

[0068] When the grain tank 7 becomes full of grain, the traveling device 2 is driven with the discharge auger 8 placed in the storage position to move toward a discharge point located on the outer periphery of the field, and then the electric motor 70 and cylinder 42 are driven to raise and move the discharge auger 8, moving the discharge section 8C located in front of the lateral discharge section 8B above the truck bed to discharge the grain.

[0069] REFERENCE SIGNS LIST 1 Machine frame 3 Pre-harvest processing device 4 Thresher 5 Control section 7 Grain tank 8 Discharge auger 8A Vertical discharge section 8B Horizontal discharge section 47 Horizontal frame 50 Regulating member 50D Support member

Claims

1. A combine harvester having a pre-harvesting device (3) for harvesting stalks provided at the front of a body frame (1), a thresher (4) provided at the rear left side of the pre-harvesting device (3), a steering unit (5) provided at the rear right side of the pre-harvesting device (3), a grain tank (7) for storing threshed grain provided at the rear of the steering unit (5), and a discharge auger (8) for discharging grain from the grain tank (7) to the outside, wherein the discharge auger (8) is formed of a vertical discharge section (8A) extending in the vertical direction and a horizontal discharge section (8B) extending forward from the upper part of the vertical discharge section (8A) and whose front section rotates in the vertical and left-right directions, and a regulating member (50) for regulating the rotation of the horizontal discharge section (8B) is provided on the upper wall of the grain tank (7), and the regulating member (50) is fixed to the grain tank (7) via a support member (50D) for mounting reinforcement.

2. A combine harvester having a pre-harvesting device (3) for harvesting stalks provided in front of a body frame (1), a thresher (4) provided on the rear left side of the pre-harvesting device (3), a steering unit (5) provided on the rear right side of the pre-harvesting device (3), a grain tank (7) for storing threshed grains provided behind the steering unit (5), and a discharge auger (8) for discharging grains from the grain tank (7) to the outside, wherein the discharge auger (8) is formed of a vertical discharge section (8A) extending in the vertical direction and a horizontal discharge section (8B) extending forward from the upper part of the vertical discharge section (8A) and whose front section rotates up, down, and left and right, a horizontal frame (47) extending in the left and right direction is provided behind the grain tank (7), and a regulating member (50) for regulating the rotation of the horizontal discharge section (8B) is provided on the horizontal frame (47).

3. A combine harvester as described in claim 2, characterized in that the regulating member (50) prevents the lateral discharge section (8B) from passing through a specific space around the driver's seat (5A).

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