JP2020014424A - Combine harvester - Google Patents

Abstract

To provide a combine harvester which can efficiently separate and filter foreign matters such as waste straw in second crops in a grain-lifting cylinder for returning second crops to a thresher.SOLUTION: A first grain-lifting cylinder (36) for conveying grains from a thresher (4) to a grain tank (7) is provided, and a second grain-lifting cylinder (41) for returning second crops from the lower part to the upper part of the thresher (4) by connecting the rear part and the front part of a right wall (4B) of the thresher (4) is provided in a rear lower inclined posture at the left side of the first grain-lifting cylinder (36). A conveying spiral (46) and a cylindrical body (45) covering the conveying spiral (46) are provided in the second grain-lifting cylinder (41), and a discharged dust filtering member (42A) having a plurality of filter holes is provided in a dust discharging port (42) formed at the lower surface side of the second grain-lifting cylinder (41). The filter holes of the discharged dust filtering member (42A) are formed in a slender shape along the outer peripheral edge of the conveying spiral (46).SELECTED DRAWING: Figure 14

Description

  TECHNICAL FIELD The present invention relates to a combine provided with a threshing machine for returning a second product to a threshing apparatus.

  In a conventional combine, a fryer for reducing the second material such as stabbed grains, which have been threshed and sorted by a threshing device, is provided upstream of a sorting shelf of the threshing device, and impurities are discharged to the outer periphery of the fryer. A technique for providing a filtering member has been known. (Patent Document 1)

JP 2005-13107 A

  However, according to the technique of Patent Document 1, in the case of a variety and work conditions in which straw chips and the like are likely to be generated, the straw chips and the like cannot be sufficiently separated in the transporting process by the transport cylinder, and there is room for further improvement. .

  Therefore, an object of the present invention is to provide a combine that can efficiently separate and filter miscellaneous substances such as straw waste in the second product in a fryer for reducing the second product to a threshing apparatus. It is in.

  The present invention which has solved the above-mentioned problems is as follows.

  That is, in the invention of claim 1, a threshing device (4) for threshing and sorting grain culm is provided on the upper side of the body frame (1), and threshing and sorting process is performed on the right side of the threshing device (4). In a combine provided with a Glen tank (7) for storing grains, a first frying cylinder (36) for conveying grains from the threshing device (4) to the Glen tank (7) is provided, The second threshing that connects the rear part and the front part of the right wall (4B) of the threshing device (4) to the left side of the tube (36) and returns the second product from the lower part to the upper part of the threshing device (4) A cylinder (41) is provided in a posture inclined backward and downward, and a conveying spiral (46) and a cylindrical body (45) covering the conveying spiral (46) are provided in the second deep-frying cylinder (41). A dust filter (4) having a plurality of filtration holes is provided in a dust outlet (42) formed on the lower surface side of the fryer cylinder (41). The A) provided a combined formed in a shape elongated along the outside edge of the dust-exhaust filter member (the conveying spiral (46 filtration pores of 42A)).

  The invention according to claim 2 is characterized in that the dust filtering member (42A) intersects a plurality of horizontal members (42F) along a tangential direction in a spiral outer peripheral portion of the transport spiral (46) and the horizontal member (42F). The combine according to claim 1, further comprising a plurality of vertical members (42G), wherein an interval between the plurality of horizontal members (42F) is set smaller than an interval between the plurality of vertical members (42G).

  The invention according to claim 3 is the combine according to claim 2, wherein the horizontal member (42F) is disposed on the transport spiral (46) side with respect to the vertical member (42G).

  According to a fourth aspect of the present invention, the second frying cylinder (41) is connected to a lower metal (43) connected to a rear part of the right wall (4B) and to a front part of the right wall (4B). Formed by an upper metal (44), the cylinder (45) connecting the lower metal (43) and the upper metal (44), and the transport spiral (46) provided inside the cylinder (45). The upper connecting part (47) of the upper part of the lower metal (43) and the cylindrical body (45) can be moved vertically with respect to the rotation axis (46A) of the transport spiral (46), and the upper metal ( 44) and the upper connecting portion (48) of the cylindrical body (45) can be moved vertically with respect to the rotating shaft (46A) of the transport spiral (46), and the rotating shaft (46A) is connected to the lower metal. The upper part of (43) and the lower part of the upper metal (44) are rotatable. A combine according to any one of claims 3 Motomeko 1.

  The invention according to claim 5, wherein the longitudinal direction of the elongated hole (47A) formed in the lower connecting portion (47) and the longitudinal direction of the elongated hole (48A) formed in the upper connecting portion (48) are the same. The combine according to claim 4, wherein the combine is formed along a direction perpendicular to the rotation axis (46A).

  According to the first aspect of the present invention, since the filtering holes of the dust filtering member (42A) are formed in an elongated shape along the outer peripheral edge of the conveying spiral (46), the elongated straw chips are efficiently discharged. can do.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, the interval between the plurality of horizontal members (42F) is set smaller than the interval between the plurality of vertical members (42G). As a result, slender waste can be efficiently discharged.

  According to the third aspect of the invention, in addition to the effect of the second aspect, the horizontal member (42F) is arranged on the side of the transport spiral (46) with respect to the vertical member (42G). Straw chips can be efficiently discharged while suppressing the resistance of grain transport.

  According to the invention as set forth in claim 4, in addition to the effect of the invention as set forth in any one of claims 1 to 3, a second deep-frying cylinder (41) is provided at the rear of the right wall (4B). A lower metal (43) to be connected, an upper metal (44) connected to a front portion of the right wall (4B), a cylinder (45) connecting the lower metal (43) and the upper metal (44), It is formed by a conveying spiral (46) provided on an inner peripheral portion of the cylindrical body (45), and an upper part of the lower metal (43) and a lower connecting portion (47) of the cylindrical body (45) are connected to the conveying spiral (46). The lower part of the upper metal (44) and the upper connecting part (48) of the cylindrical body (45) are fixed so as to be movable in the vertical direction orthogonal to the rotation axis (46A), and the rotation axis (46A) of the conveying spiral (46). Is fixed so as to be movable in the vertical direction perpendicular to the upper metal (43A) and the upper metal (43). Since it is rotatably fixed to the lower part of 4), the interval between the cylindrical body (45) and the conveying spiral (46) can be easily adjusted according to the crop, and the second product can be efficiently returned to the threshing device (4). be able to.

  According to the fifth aspect of the invention, in addition to the effect of the fourth aspect, in addition to the long axis of the long hole (47A) formed in the lower connection part (47) and the upper connection part (48). Since the long axis of the elongated hole (48A) is formed along the vertical direction orthogonal to the rotation axis (46A), the interval between the cylindrical body (45) and the conveying spiral (46) can be adjusted more easily. The waste can be efficiently reduced by the threshing device (4).

It is a top view of a combine. It is a left view of a combine. It is a front view of a purification device. It is a front perspective view of a purification device. It is a rear perspective view of a purification device. It is a front perspective view of the supply device which supplies urea. It is a right side view of a 1st fried grain and a 2nd fried grain. It is explanatory drawing of the clearance gap of the spiral part and cylindrical part of a 2nd deep-frying cylinder, (a) is a case where a crop is rice, wheat, (b) is soybean, (C) is a case of gold. FIG. 9 is a sectional view taken along the arrow A in FIG. It is explanatory drawing of the discharge port of a 1st fried grain cylinder. It is explanatory drawing of the connection pipe connected to the purification device and the tail pipe. It is another arrangement form of the tail pipe of FIG. It is the side view of the principal part which shows the periphery of a dust filter, and the figure of the conveyance spiral seen from the axial center direction. It is explanatory drawing which shows the aspect of a dust filter.

  As shown in FIGS. 1 and 2, the general-purpose combine is provided with a traveling device 2 including a pair of right and left crawlers that travels on the soil surface below the body frame 1, and harvests culms in a field in front of the body frame 1. A threshing device 4 for threshing and sorting the harvested grain culm is provided on the left rear side of the pre-cutting device 3, and a pilot is on the right rear side of the pre-cutting device 3. Operating section 5 is provided.

  An engine room 6 for mounting an engine is provided below the control unit 5, and a Glen tank 7 for storing grain that has been threshed and sorted is provided behind the control unit 5, and a rear side of the Glen tank 7 is provided. Is provided with a discharge tube 8 for discharging the grains to the outside.

  The pre-cutting treatment device 3 includes a transport device 3A that transports the grain culm in the field to the rear while standing up, a cutting blade device 3B that cuts the root of the grain culm transported to the lower rear portion of the transport device 3A, An auger device 3C for collecting the culms conveyed to the rear side of the device 3A to the left and a feeder house 3D for conveying the culms collected to the threshing device 4.

  As shown in FIGS. 3 to 5, a purification device 10 that purifies exhaust gas burned by the engine is connected to the engine.

  The purifying device 10 includes an exhaust purifying device (DPF) 12 for purifying impurities in exhaust gas and a urea purifying device (SCR) 14 for purifying nitrogen oxides in exhaust gas exhausted from the exhaust purifying device 12. . The exhaust purification device 12 includes an oxidation catalyst (DOC) on the upstream side and a particulate filter (DPF) on the downstream side.

  The exhaust port of the engine and the inlet formed at the front of the exhaust purification device 12 are connected by a flexible connection pipe 11, and the outlet formed at the rear of the exhaust purification device 12 and the front of the urea purification device 14. The inflow port formed in the section is connected by a flexible connection pipe 13, and the outflow port formed in the rear part of the urea purification device 14 is connected to a flexible connection pipe 15.

  An injection device 17 for injecting urea water into the urea purification device 14 via the connection tube 13 is connected to a rear portion of the connection tube 13, and the urea water is pressure-fed to the injection device 17 via a flexible connection tube. A urea water tank (not shown) for storing urea water is connected to the supply device 18 via a flexible connection pipe.

  The purifying device 10 is mounted on the purifying device frame 20, and a front portion of the purifying device frame 20 is fixed to a cockpit frame 50 extending in the left-right direction that supports a cockpit of the control unit 5. The left portion is fixed to a threshing frame 63 that extends in the front-rear direction and is provided on an upper portion of a right wall 4B of the threshing device 4.

  The exhaust gas purification device 12 is provided on the left side of the purification device frame 20 on the threshing device 4 side, and the urea purification device 14 is provided on the right side of the purification device frame 20 on the Glen tank 7 side. The upper portions of the exhaust gas purification device 12 and the urea purification device 14 are provided at substantially the same position in the vertical direction as the handle cylinder cover 60 provided above the handle cylinder of the threshing device 4.

  At the front of the left wall 7A of the Glen tank 7 facing the purification device 10, a notch S having openings on the front and left sides is formed. Thereby, the purification device 10 can be provided between the threshing device 4 and the Glen tank 7.

  The portion of the left wall 7 </ b> A of the Glen tank 7 located on the front side of the first frying cylinder 36 is an upper vertical wall 31 and an upper inclined wall extending downward and to the right from the lower end of the upper vertical wall 31 in front view. 32, a vertical wall 33 extending downward from the lower end of the upper inclined wall 32, a lower inclined wall 34 extending downward and leftward from the lower end of the vertical wall 33, and a lower end extending from the lower end of the lower inclined wall 34. It is formed by a lower vertical wall 35 extending to the side. The notch S is a space defined by the upper inclined wall 32, the vertical wall 33, and the lower inclined wall 34.

  The upper inclined wall 32 extends downward and rightward at an inclination angle of 45 degrees with respect to the horizontal plane, the vertical wall 33 is formed above the conveying spiral of the Glen tank 7, and the lower inclined wall 34 is inclined with respect to the horizontal plane. It extends to the lower left at an angle of 30 degrees. Thereby, the grains transported to the Glen tank 7 by the first frying cylinder 36 can be efficiently dropped on the transport spiral.

  The left portion of the cockpit frame 50 is connected to an inverted U-shaped left frame 52 provided at a front intermediate portion of the body frame 1 via a connecting member 51 extending in the vertical direction. The right portion is connected to an inverted U-shaped right frame 54 provided on the front right portion of the body frame 1 via a connecting member 53 extending in the vertical direction.

  The left part of the handle cylinder cover 60 of the threshing device 4 is rotatably supported by a support shaft 61 provided on an upper portion of a left wall 4A of the threshing device 4 and extending in the front-rear direction. Thereby, at the time of maintenance of the handling cylinder or the like, a large space can be formed above the handling cylinder when the left portion of the handling cylinder cover 60 is rotated about the support shaft 61.

  A right-side extending portion 62 provided at a lower right portion of the handle cover 60 is detachably fixed to a front-rear extending threshing frame 63 provided at an upper portion of a right wall 4B of the threshing device 4. ing.

  The rear part of the threshing frame 63 is connected to the body frame 1 via a connecting member 55 extending in the vertical direction. Thereby, the deformation of the threshing frame 63 can be prevented, and the purification device frame 20 can be reliably supported by the cockpit frame 50 and the threshing frame 63.

  The connection pipe 15 extends from the outlet of the urea purification device 14 to the vicinity of the upper inclined wall 32 of the cutout S of the Glen tank 7, and then bends substantially 90 degrees to the left to make the left first lift up. It extends to the left side between the transmission part 39 formed extending downward from the cereal cylinder 36 and the discharge port 37 of the first fried cereal cylinder 36, and then is bent approximately 90 degrees to the rear side. Then, it is extended rearward while approaching the left portion of the first fried food cylinder 36. Thereby, the handling drum cover 60 can be easily rotated about the support shaft 61. In addition, the connection pipe 15 is detachably fixed to the first fryer cylinder 36 via a stay (not shown) provided at a front portion of the first fryer cylinder 36.

  As shown in FIGS. 6 and 7, behind the purification device 10, there is provided a first frying cylinder 36 connected to a lower portion of the right wall 4B of the threshing device 4 and an upper portion of the left wall 7A of the Glen tank 7. I have. Further, between the right wall 4B of the threshing apparatus 4 and the first fried cylinder 36, there is provided a second fried cylinder 41 for returning the second product such as stabbed grains to the upstream of the sorting shelf of the threshing apparatus 4. Have been.

  In the present embodiment, the lower metal 43 of the second fryer 41 is formed as a reduction outlet formed at the lower part of the right wall 4B of the threshing device 4 located behind the first fryer 36, The upper metal 44 of the milling cylinder 41 is connected to a reduction outlet formed at the front of the right wall 4B of the threshing device 4 located below the purification device 10.

  A supply device 18 for pressure-feeding urea water to the injection device 17 is fixed to the body frame 1 via a support member 19. The support member 19 is formed from a front frame 19A, a rear frame 19B, and a connecting member 19C that connects a left portion of the front frame 19A and a left portion of the rear frame 19B, each of which has a substantially U shape in a front view. I have.

  The supply device 18 is detachably attached to the right side of the connecting member 19C, and lower portions of the front frame 19A and the rear frame 19B are fixed to the body frame 1, and the front frame 19A, the rear frame 19B, and the connecting member 19C are It is not directly connected to the purification device frame 20 on which the purification device 10 is mounted, the connecting member 55 that supports the purification device frame 20, and the like. Thereby, transmission of the vibration of the purification device 10 to the supply device 18 can be suppressed.

  In a front view, the supply device 18 is provided between the first deep-frying cylinder 36 and the second deep-frying cylinder 41. Thereby, the traveling wind generated during traveling of the vehicle body can be efficiently blown rearward between the threshing device 4 and the Glen tank 7.

  In a side view, the supply device 18 is provided in front of the dust outlet 42 of the second deep-frying cylinder 41 in the front-rear direction. Accordingly, it is possible to prevent dust such as straw waste falling from the dust outlet 42 from accumulating on the supply device 18.

  At the lower part on the front side of the threshing device 4, a Karamin 66 for blowing a sorting wind to a sorting shelf is provided. When viewed from the rotation axis of the Karino 66, the supply device 18 is disposed above the rear side of the air inlet 67 of the Karamino 66. As a result, the front part of the air inlet 67 is opened, and a large amount of air can be sucked from the front part of the air inlet 67 toward the Karino 66.

  As shown in FIGS. 8 and 9, the second deep-frying cylinder 41 is provided inside a lower metal 43, an upper metal 44, a cylinder 45 connecting the lower metal 43 and the upper metal 44, and a cylinder 45. And a conveying spiral 46 for frying the second product.

  The lower part of the rotary shaft 46A of the transport spiral 46 is rotatably fixed to the lower metal 43, and the upper part of the rotary shaft 46A of the transport spiral 46 is rotatably fixed to the upper metal 44.

  The lower part of the cylindrical body 45 is formed of an upper part and a lower part located below the upper part. A rectangular lower connecting portion 47 is provided on an upper outer peripheral portion orthogonal to the rotation shaft 46A in the upper portion, and a rectangular lower connecting portion 47 is provided on a lower outer peripheral portion orthogonal to the rotating shaft 46A in the lower portion. Is provided. Further, a rectangular upper connecting portion 48 is provided on an outer peripheral portion of the upper portion of the cylindrical body 45 orthogonal to the rotation shaft 46A.

  A long hole 47A having a long axis in the vertical direction perpendicular to the rotation axis 46A is formed on both left and right sides of the upper part of the lower connecting part 47 provided at the upper part of the lower part of the cylinder 45. A long hole 47A having a long axis in the vertical direction perpendicular to the rotation shaft 46A is formed on both left and right sides of a lower portion of the lower connecting portion 47 provided in a lower portion of the lower part of the lower part. Further, a long hole 48A having a long axis in a vertical direction perpendicular to the rotation axis 46A is formed on both upper and lower left and right sides of the upper connecting portion 48, respectively.

  The lower connecting portion 47 is fixed in the vicinity of the outlet of the lower metal 43 by a fastening means 49 such as a bolt inserted into the elongated hole 47A so as to be vertically movable. The upper connecting portion 48 is fixed in the vicinity of the entrance of the upper metal 44 movably in the vertical direction by fastening means 49 such as bolts inserted into the elongated hole 48A. The up-down direction means a direction orthogonal to the rotation shaft 46A shown in FIG. Thereby, the lower connecting part 47 and the upper connecting part 48 are moved up and down in accordance with the crop to be harvested, so that the space between the lower inner peripheral part of the cylindrical body 45 and the lower outer peripheral part of the transport spiral 46 is easily formed. Can be adjusted.

  As shown in FIGS. 8 and 9 (a), in the case of rice or wheat having a small particle size, the lower connecting portion 47 and the upper connecting portion 48 are moved in a lower direction orthogonal to the rotation axis 46A to form a cylindrical body. The interval T between the lower inner peripheral portion of the transfer spiral 45 and the lower outer peripheral portion of the transport spiral 46 is made smaller than a predetermined interval. This prevents the second rice and wheat from falling from between the lower inner peripheral portion of the cylindrical body 45 and the lower outer peripheral portion of the transport spiral 46 toward the lower metal 43 at the time of graining. , The second wheat product can be efficiently returned to the upstream of the sorting shelf of the threshing apparatus 4.

  As shown in FIGS. 8 and 9C, in the case of gold having a large particle size, the lower connecting portion 47 and the upper connecting portion 48 are moved upward, and the inner peripheral lower portion of the cylindrical body 45 and the conveying spiral 46 are moved. Is made wider than the predetermined interval. Thereby, it is possible to prevent the surface of the gold second product from being damaged at the time of raising the grain, and to efficiently return the gold second product to the upstream of the sorting shelf of the threshing apparatus 4.

  As shown in FIGS. 8 and 9 (b), in the case of soybean having a particle size larger than that of rice and wheat and smaller than gold, the lower connecting portion 47 and the upper connecting portion 48 are vertically moved perpendicular to the rotation axis 46A. Then, the distance T between the lower inner peripheral portion of the cylindrical body 45 and the lower outer peripheral portion of the transport spiral 46 is set to a predetermined interval. As a result, the second soybean can be efficiently returned to the upstream portion of the sorting shelf of the threshing device 4 at the time of frying.

  It is preferable to mark rice, wheat, or the like near the elongated hole 47A of the lower connecting portion 47 and the elongated hole 48A of the upper connecting portion 48. Thereby, the lower connecting part 47 and the upper connecting part 48 can be easily moved and fixed according to the mark of rice, wheat, or the like.

  Further, a dust filter 42A that covers the dust outlet 42 is attached to the dust outlet 42 of the above-described second deep-frying cylinder 41. The dust filtration member 42A is a member having a plurality of filtration holes, and is formed of, for example, a punching plate or a net.

  As shown in FIG. 13, the inner peripheral surface 42B of the dust filtering member 42A is located inside the inner peripheral surface of the cylindrical body 45 (closer to the rotation shaft 46A than the inner peripheral surface of the cylindrical body 45). For example, it is located about 2 mm to 5 mm inside the inner peripheral surface of the cylindrical body 45. Thereby, impurities such as straw waste contained in the processing object can be efficiently discharged to the outside of the supply device 18. In addition, the supply device 18 can be made compact while having the dust filtering member 42A, and problems such as interference with peripheral members and a reduction in ventilation space can be suppressed.

  Further, the inside of the cylindrical body 45 is configured such that the upstream and downstream portions 42C and 42E of the dust filtration member 42A in the transport direction are low, and become higher toward the central portion 42D (also referred to as “intermediate portion”) in the transport direction. It is formed in a shape bulging toward. Since the upstream portion 42C and the downstream portion 42E of the dust filtering member 42A are formed to be low in this manner, it is possible to suppress damage to grains and stagnation at the boundary between the cylindrical body 45 and the dust filtering member 42A. it can. In addition, since the central portion 42D is formed high, foreign matters such as straw waste contained in the conveyed material can be effectively removed, and the processing load of the threshing device 4 is suppressed, thereby improving the processing efficiency. Can be done.

  In addition, the filtration hole provided in the dust filtration member 42A is formed in a shape that is long in the tangential direction at the outer periphery of the spiral of the transport spiral 46. That is, the size of the filtration hole in the direction parallel to the tangential direction in the outer peripheral portion of the spiral is larger than the size in the direction perpendicular to the tangential direction in the outer peripheral portion of the spiral of the transport spiral 46.

  This makes it possible to efficiently discharge the long straw waste contained in the processing object supplied to the second deep-frying cylinder 41 to the outside of the machine. The slender straw waste is transported while being pushed up to the outer peripheral portion of the transport spiral 46 during the transport process in the transport spiral 46, and thus often takes a posture along the tangential direction of the transport spiral 46. Leakage of grains can be prevented while efficiently discharging straw waste.

  Although the method of setting the shape of the filtration hole is arbitrary, for example, a mesh formed of a horizontal member 42F that is a wire in the tangential direction in the spiral outer peripheral portion and a vertical member 42G that is a wire in a direction orthogonal to the spiral is used. Thus, the wire pitch of the vertical member 42G can be increased (see FIG. 14A), or the plate material can be punched into a long hole shape (see FIG. 14B).

  In FIG. 14, X and Y indicate the circumferential direction and the axial direction of the rotating shaft 46A, respectively, and U and V indicate the tangential direction and the direction orthogonal to the spiral outer peripheral portion of the transport spiral 46, respectively.

  As shown in FIG. 10, a rotating plate 38A supported by a rotating shaft 38 extending in the vertical direction is provided at the discharge port 37 of the first fried cylinder 36, and the upper surface of the rotating plate 38A has A substantially trapezoidal discharge member 38B is provided upright. Thereby, the grains can be discharged to the distal portion of the Glen tank 7 distant from the discharge port 37 by applying momentum to the grains by the discharge member 38B.

  The upper part of the discharge member 38B extends to a position lower than the upper part of the discharge port 37. Thereby, the grains passing above the upper portion of the discharge member 38B are discharged to the vicinity of the discharge port 37 in the Glen tank 7, and the grains can be uniformly discharged to the Glen tank 7. . In addition, a transmission portion 39 that transmits the output rotation of the engine to the rotating shaft 38 is provided below the discharge port 37.

  As shown in FIG. 11, the outlet of the connection pipe 15 is connected to a tail pipe 16 fixed to the left part of the first fried food cylinder 36. Note that the tail pipe 16 can be fixed to the right part of the second deep-frying cylinder 41.

  The inside diameter of the inflow port of the connection pipe 15 is formed larger than the outside diameter of the outflow port of the urea purification device 14. Thereby, the air around the outlet of the urea purifier 14 is sucked into the connection pipe 15, and the temperature of the exhaust gas discharged from the urea purifier 14 to the connection pipe 15 can be reduced. Further, the inside diameter of the inflow port of the tail pipe 16 is formed larger than the outside diameter of the outflow port of the connection pipe 15. Thereby, the surrounding air at the outlet of the connection pipe 15 is sucked into the tail pipe 16, and the temperature of the exhaust gas discharged from the connection pipe 15 to the tail pipe 16 can be reduced.

  The inlet of the connecting pipe 15 is inserted into the outlet of the urea purification device 14 with a predetermined gap, and the outlet of the connecting pipe 15 is inserted into the inlet of the tail pipe 16 with a predetermined gap. It is fitted. Thus, with the urea purification device 14 and the tail pipe 16 fixed, the connection pipe 15 can be moved in the front-rear direction to be attached to and detached from the urea purification apparatus 14 and the tail pipe 16 and the connection pipe 15 can be easily replaced. .

  As shown in FIG. 12, the tail pipe 16 can be provided at a downward slope. Accordingly, it is possible to prevent rainwater that has entered the tail pipe 16 from entering the urea purification device 14 via the connection pipe 15.

DESCRIPTION OF SYMBOLS 1 Body frame 4 Threshing device 4B Right wall 7 Glen tank 36 1st raising cylinder 41 2nd raising cylinder 42 Dust outlet 42A Dust filtration member 42F Horizontal member 42G Vertical member 43 Lower metal 44 Upper metal 45 Cylindrical body 46 Transportation Spiral 46A Rotating shaft 47 Lower connecting part 47A Slot 48 Upper connecting part 48A Slot

Claims (5)

A threshing device (4) for threshing and sorting grain culm is provided on the upper side of the body frame (1), and a grain tank (7) for storing threshed and sorted grain is provided on the right side of the threshing device (4). In the combine with
A first frying cylinder (36) for transferring grains from the threshing device (4) to the Glen tank (7);
The second part is returned from the lower part to the upper part of the threshing device (4) by connecting the rear part and the front part of the right wall (4B) of the threshing device (4) to the left side of the first threshing cylinder (36). The second deep-frying cylinder (41) is provided in a posture inclined backward and downward,
A transport spiral (46) and a cylinder (45) that covers the transport spiral (46) are provided in the second deep-frying cylinder (41),
A dust filter (42A) having a plurality of filtration holes is provided in a dust port (42) formed on the lower surface side of the second graining cylinder (41),
A combine having a filter hole of the dust filtering member (42A) formed in an elongated shape along an outer peripheral edge of the transport spiral (46). A plurality of horizontal members (42F) along a tangential direction in a spiral outer peripheral portion of the transport spiral (46) and a plurality of vertical members (42G) intersecting with the horizontal member (42F) on the dust filtering member (42A). With
The combine according to claim 1, wherein an interval between the plurality of horizontal members (42F) is set smaller than an interval between the plurality of vertical members (42G).   The combine according to claim 2, wherein the horizontal member (42F) is arranged on the transport spiral (46) side with respect to the vertical member (42G). A lower metal (43) connected to the rear of the right wall (4B), and an upper metal (44) connected to the front of the right wall (4B); Formed by the cylinder (45) connecting the lower metal (43) and the upper metal (44), and the transport spiral (46) provided inside the cylinder (45);
An upper portion of the lower metal (43) and a lower connecting portion (47) of the cylindrical body (45) are vertically movable with respect to a rotation axis (46A) of the transport spiral (46);
A lower portion of the upper metal (44) and an upper connecting portion (48) of the cylindrical body (45) are vertically movable with respect to a rotation axis (46A) of the transport spiral (46);
The combine according to any one of claims 1 to 3, wherein the rotating shaft (46A) is rotatable about an upper portion of the lower metal (43) and a lower portion of the upper metal (44).   The longitudinal direction of the elongated hole (47A) formed in the lower connecting portion (47) and the longitudinal direction of the elongated hole (48A) formed in the upper connecting portion (48) are orthogonal to the rotation axis (46A). The combine according to claim 4, wherein the combine is formed along a direction.

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