Combine

Abstract

To provide a combine that does not deteriorate a commercial value of crops by suppressing contact of crops with a lifter device.SOLUTION: An auger device (3C) of a reaping pretreatment device (3) is formed of an auger frame (30) whose front part and upper part are open, and a raking-in auger (31) laid between the left wall and the right wall of the auger frame (30). A right and left pair of lifter devices (40) are provided on the top face of the lower wall of the auger frame (30) with a predetermined interval in the right-left direction. A first rotary body (44) is provided rotatably supported by the left wall and the right wall of the auger frame (30). The lifter devices (40) are provided with support members (41) provided movably in the right-left direction on the top face of the lower wall of the auger frame (30), second rotary bodies (42) rotatably supported by the support members (41), and a right and left pair of lifters (43) provided to the second rotary bodies (42) extending on the front side with a predetermined interval in the right-left direction. The second rotary bodies 42 are externally fitted to a connection shaft (45) extending from the first rotary body (44) toward the second rotary bodies (42) so as to be movable in the right-left direction.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a lifter device that extends forward of a cutting blade device of a combine harvester. [Background technology]

[0002] Conventionally, a technology has been known in which a lifter device extends forward of a cutting blade device that cuts the base of the culms transported from a raking device of a pre-harvesting treatment device in order to scoop up crops such as culms that have fallen in a field. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-104331 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the technology of Patent Document 1, the rear part of the lifter device is fixed to the front part of the lower wall of the auger device via the blade device, so that if the row spacing of the crop changes significantly, the crop and the lifter device may come into contact with each other, causing scratches on the surface of the crop, which may reduce the commercial value of the crop.

[0005] Therefore, an object of the present invention is to propose a combine harvester that suppresses contact between the crop and the lifter device and does not reduce the commercial value of the crop. [Means for solving the problem]

[0006] The present invention which has solved the above problems is as follows. That is, the invention described in claim 1 is a combine harvester having a traveling device (2) provided under a machine frame (1), a pre-harvesting device (3) provided in front of the machine frame (1), and a threshing device (4) provided behind the pre-harvesting device (3), The pre-harvesting treatment device (3) is composed of a raking device (3A) that transports the culms in the field to the rear while raising them upright, a cutting blade device (3B) that cuts the base of the transported culms, an auger device (3C) that gathers the transported culms to one side, and a feeder house (3D) that transports the gathered culms to a threshing device (4). The auger device (3C) is formed of an auger frame (30) with an open front and top, and raking augers (31) installed on the left and right walls of the auger frame (30). A pair of left and right lifter devices (40) are provided on the upper surface of the lower wall of the auger frame (30) at a predetermined interval in the left-right direction. This combine harvester is characterized in that a first rotating body (44) is provided rotatably supported on the left and right walls of the auger frame (30), the lifter device (40) includes a support member (41) provided on the upper surface of the lower wall of the auger frame (30) so as to be movable in the left-right direction, a second rotating body (42) supported rotatably on the support member (41), and a pair of left and right lifters (43) extending forward from the second rotating body (42) at a predetermined interval in the left-right direction, and the second rotating body (42) is externally fitted onto a connecting shaft (45) extending from the first rotating body (44) toward the second rotating body (42) so as to be movable in the left-right direction.

[0007] The invention described in claim 2 is the combine described in claim 1, in which the support member (41) of the left lifter device (40) is fixed to an upper surface of the lower wall of the auger frame (30) to restrict movement in the left-right direction.

[0008] The invention as set forth in claim 3 is the combine harvester as set forth in claim 1 or 2, wherein the cross section of the connecting shaft (45) is formed into a polygonal shape.

[0009] The invention described in claim 4 is a combine harvester described in claim 1, in which the lifter (43) is formed of an upper lifter (50) extending in the front-to-rear direction, a lower lifter (51) extending in the front-to-rear direction, a connecting member (52) connecting the rear of the upper lifter (50) to the front of the lower lifter (51), and a connecting plate (55) connecting the lower part of the upper lifter (50) to the front of the connecting member (52), and in which a rectangular detection body (60) that contacts the straw and a first sensor (61) that measures the amount of deformation of the detection body (60) are provided on the inner surface of the connecting plate (55).

[0010] The invention described in claim 5 is a combine harvester described in claim 1, in which the lifter (43) is formed of an upper lifter (50) extending in the front-to-rear direction, a lower lifter (51) extending in the front-to-rear direction, a connecting member (52) connecting the rear of the upper lifter (50) to the front of the lower lifter (51), and a connecting plate (55) connecting the lower part of the upper lifter (50) to the front of the connecting member (52), the front part of a sled (67) sliding on the field surface is rotatably supported on a support shaft (65) extending downward from the front of the upper lifter (50), and a second sensor (68) for measuring the amount of movement of the rear part of the sled (67) is provided on the inner surface of the connecting plate (55).

[0011] The invention described in claim 6 is a combine described in claim 1, in which a raking finger (34B) for raking in the straw transported to the outer peripheral surface of the raking auger (31) is provided in the left-right middle of the lifter (43) of the right-side lifter device (40) when viewed in a plane.

[0012] The invention described in claim 7 is a combine described in claim 6, in which, when viewed from the front, the left lifter (43) of the left lifter device (40) is positioned above the left-right center of the left crawler of the traveling device (2).

[0013] The invention described in claim 8 is a combine described in claim 7, in which, when viewed from the front, the right lifter (43) of the right lifter device (40) is positioned above the left-right center of the right crawler of the traveling device (2). Effect of the Invention

[0014] According to the invention described in claim 1, the pre-harvest processing device (3) is composed of a raking device (3A) that transports the culms in the field rearward while raising them upright, a cutting blade device (3B) that cuts the base of the transported culms, an auger device (3C) that gathers the transported culms to one side, and a feeder house (3D) that transports the gathered culms to the threshing device (4). The auger device (3C) is formed of an auger frame (30) with an open front and top, and a raking auger (31) installed on the left and right walls of the auger frame (30). A pair of left and right lifter devices (40) are provided on the upper surface of the lower wall of the auger frame (30) at a predetermined interval in the left-right direction, and are rotatably supported on the left and right walls of the auger frame (30). The lifter device (40) comprises a support member (41) mounted on the upper surface of the lower wall of the auger frame (30) so as to be movable in the left-right direction, a second rotating body (42) supported on the support member (41) so as to be rotatable, and a pair of left and right lifters (43) extending forward from the second rotating body (42) at a predetermined interval in the left-right direction, and the second rotating body (42) is externally fitted onto a connecting shaft (45) extending from the first rotating body (44) toward the second rotating body (42) so as to be movably in the left-right direction. Therefore, the lifter device (40) can be quickly moved in the left-right direction to match the spacing between the rows of the crops in the field, thereby suppressing contact between the crops and the lifter device (40) and preventing a decrease in the commercial value of the crops.

[0015] According to the invention of claim 2, in addition to the effect of the invention of claim 1, the support member (41) of the left lifter device (40) is fixed to the upper surface of the lower wall of the auger frame (30) to restrict movement in the left and right direction, thereby reducing the number of parts, etc. Also, since the pair of left and right lifters (43) do not shift in the left and right direction due to vibration, etc., there is no effect on scooping up crops such as stalks.

[0016] According to the invention described in claim 3, in addition to the effects of the invention described in claim 1 or 2, the cross section of the connecting shaft (45) is formed into a polygonal shape, so that the rotation of the second rotating body (42) accompanying the upward and downward movement of the front part of the lifter (43) can be reliably transmitted to the first rotating body (44).

[0017] According to the invention described in claim 4, in addition to the effects of the invention described in claim 1, the lifter (43) is formed of an upper lifter (50) extending in the front-rear direction, a lower lifter (51) extending in the front-rear direction, a connecting member (52) connecting the rear of the upper lifter (50) to the front of the lower lifter (51), and a connecting plate (55) connecting the lower part of the upper lifter (50) to the front of the connecting member (52), and a rectangular detection body (60) that contacts the stalks and a first sensor (61) that measures the deformation amount of the detection body (60) are provided on the inner surface of the connecting plate (55). Therefore, the operator can be quickly alerted and the general-purpose combine can be steered so that the stalks are raked in evenly throughout the entire area of ​​the raking device (3A).

[0018] According to the invention described in claim 5, in addition to the effects of the invention described in claim 1, the lifter (43) is formed of an upper lifter (50) extending in the front-rear direction, a lower lifter (51) extending in the front-rear direction, a connecting member (52) connecting the rear part of the upper lifter (50) to the front part of the lower lifter (51), and a connecting plate (55) connecting the lower part of the upper lifter (50) to the front part of the connecting member (52), and the front part of the sled (67) sliding on the field surface is rotatably supported on a support shaft (65) extending downward from the front part of the upper lifter (50), and a second sensor (68) measuring the amount of movement of the rear part of the sled (67) is provided on the inner surface of the connecting plate (55). Therefore, the operator can be quickly alerted and the general-purpose combine can be steered so that the straw is raked evenly throughout the entire area of ​​the raking device (3A).

[0019] According to the invention described in claim 6, in addition to the effects of the invention described in claim 1, a shoveling finger (34B) for shoveling the stalks transported to the outer peripheral surface of the shoveling auger (31) is provided in the left-right middle of the lifter (43) of the right-side lifter device (40) when viewed in a plane, so that the stalks transported from the shoveling device (3A) to the auger device (3C) can be efficiently drawn into the shoveling auger (31).

[0020] According to the invention described in claim 7, in addition to the effects of the invention described in claim 6, when viewed from the top, the left lifter (43) of the left lifter device (40) is positioned above the center in the left-right direction of the left crawler of the traveling device (2), so that the left crawler of the traveling device (2) can be made to run along the ridges to efficiently harvest grain stalks in the field.

[0021] According to the invention described in claim 8, in addition to the effects of the invention described in claim 7, when viewed from the front, the right lifter (43) of the right lifter device (40) is positioned above the center in the left-right direction of the right crawler of the traveling device (2), so that the right crawler of the traveling device (2) can be made to run along the ridges, thereby efficiently harvesting the straw in the field. [Brief description of the drawings]

[0022] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. 4 is a left side view illustrating the scraping device and the lifter device. [Diagram 5] FIG. 2 is a perspective view of a cutting blade device and an auger device. [Figure 6] FIG. 2 is a plan view of the cutting blade device and the auger device. [Figure 7] FIG. 2 is a plan view of the scraping auger of the auger device. [Figure 8] FIG. 2 is a plan view of a rotating body of the lifter device according to the first embodiment. [Figure 9] FIG. 4 is a rear view of a rotating body of the lifter device. [Figure 10] 2 is a front view of a lifter of the lifter device and a crawler of the traveling device. FIG. [Figure 11] FIG. [Figure 12] FIG. [Figure 13] FIG. 11 is a perspective view of a lifter device according to a second embodiment. [Figure 14]FIG. [Figure 15] 2 is a plan view of the cutting blade device and the auger device to which the lifter device is attached. FIG. [Figure 16] FIG. 11 is a perspective view of a lifter device according to a third embodiment. [Figure 17] FIG. [Figure 18] 2 is a plan view of the cutting blade device and the auger device to which the lifter device is attached. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] As shown in Figures 1 to 3, a general-purpose combine harvester has a traveling device 2 consisting of a pair of left and right crawlers that travels on the soil surface on the underside of a body frame 1, a pre-harvesting processing device 3 that harvests grain stalks in the field is provided on the front side of the body frame 1, a thresher 4 that threshes and sorts the harvested grain stalks is provided on the rear left side of the pre-harvesting processing device 3, and a control unit 5 on which an operator rides is provided on the rear right side of the pre-harvesting processing device 3.

[0024] An engine room 6 that houses the engine is provided below the control unit 5, a grain tank 7 that stores the threshed and sorted grains is provided behind the control unit 5, and a discharge auger 8 that discharges the grains to the outside is provided behind the grain tank 7.

[0025] The pre-harvesting processing device 3 is composed of a scraping device 3A that stands the stumps in the field and transports them to the rear, a cutting blade device 3B that cuts the base of the stumps transported to the lower rear side of the scraping device 3A, an auger device 3C that gathers the stumps transported to the rear side of the scraping device 3A to the left side, and a feeder house 3D that transports the gathered stumps (material to be processed) to the threshing device 4.

[0026] <Scraping device> As shown in FIG. 4, the scraping device 3A is provided on the upper front side of the auger frame 30 of the auger device 3C, and is formed to have substantially the same width as the width of the auger frame 30 in the left-right direction.

[0027] The take-in device 3A is composed of a take-in reel 10 and a pair of left and right arms 11 that raise and lower the take-in reel 10 in the vertical direction.

[0028] When viewed from the side, the take-in reel 10 is formed in an approximately hexagonal shape, with tine support rods 12 extending in the left-right direction provided at six corners, and a number of reel tines 13 are suspended from the tine support rods 12 at predetermined intervals in the left-right direction.

[0029] A rotating shaft 14 extending in the left-right direction is mounted on the front of the arm 11, and the take-in reel 10 is supported on the rotating shaft 14. The rear of the arm 11 is rotatably fixed to the upper part of the rear wall of the auger frame 30 of the auger device 3C, and the middle part between the arm 11 and the left wall of the auger frame 30 is connected by a lifting device 15 such as a hydraulic cylinder that swings the arm 11 up and down.

[0030] <Mower blade device> As shown in FIGS. 5 and 6, the cutting blade device 3B extending in the left-right direction is provided at the front end of the lower wall of the auger frame 30 of the auger device 3C.

[0031] The cutting blade device 3B is composed of a finger-shaped fixed blade 20 with a narrow blade width in the left-right direction and a long blade length in the front-rear direction, and a triangular movable blade 21 with a wide blade width in the left-right direction and a short blade length in the front-rear direction. The rear part of the movable blade 21 slides left-right in a groove formed by the fixed blade 20 and a cutting blade plate 22 provided on the upper side of the rear part of the fixed blade 20 and extending in the left-right direction. This makes it possible to efficiently cut the bases of many culms.

[0032] <Auger device> As shown in FIGS. 5 and 6, the auger device 3C is composed of an auger frame 30 and a scraping auger 31 mounted on the left and right walls of the auger frame 30.

[0033] The auger frame 30 is formed of a lower wall, a left wall erected on the left part of the lower wall, a right wall erected on the right part of the lower wall, and a rear wall connecting the rear part of the lower wall, the left wall, and the right wall. In addition, an inlet (not shown) for transporting the stalks to the feeder house 3D is formed on the left side of the rear wall. In addition, in a side view, the lower wall of the auger frame 30 is formed in a gentle curved shape that protrudes downward.

[0034] As shown in FIG. 7, the scraping auger 31 is composed of a rotating shaft 32 rotatably mounted on the left and right walls of the auger frame 30 and a cylindrical rotating body 33 supported by the rotating shaft 32.

[0035] A plurality of raking fingers 34A that can freely move in and out of the outer circumferential surface are provided on the left side of the outer circumferential surface of the rotor 33. This allows the stalks that have been gathered in front of the inlet of the auger frame 30 to be efficiently transported to the feeder house 3D.

[0036] A plurality of conveying spirals 35 are provided on the right side of the outer circumferential surface of the rotor 33, and a raking finger 34B that can freely appear and disappear on the outer circumferential surface is provided between adjacent conveying spirals 35. This allows the stalks conveyed to the auger frame 30 to be efficiently gathered in front of the inlet, and also allows the stalks conveyed from the raking reel 10 to the auger frame 30 to be conveyed to the outer circumferential surface of the rotor 33.

[0037] The bases of the sweeping fingers 34A and 34B are fixed to a support shaft 36 extending in the left-right direction. The support shaft 36 is disposed at a predetermined distance in the radial direction from the rotating shaft 32, and the left and right portions of the support shaft 36 are connected to the rotating shaft 32 via connecting members 37. This allows the tips of the sweeping fingers 34A and 34B to appear and disappear from the outer circumferential surface of the rotating body 33 when the rotating shaft 32 is rotated.

[0038] In addition, in a plan view, the raking finger 34B is provided at the center in the left-right direction of two lifters 43B of the lifter device 40B described later. This allows the stalks transported from the raking device 3A to the auger device 3C to be efficiently pulled toward the outer circumferential surface of the raking auger 31.

[0039] (Lifter device of the first embodiment) As shown in FIG. 6, the lifter devices 40 of the first embodiment are provided on the left and right front portions of the lower wall of the auger frame 30, respectively.

[0040] The lifter device 40 is composed of a support member 41 fixed to the upper surface of the lower wall of the auger frame 30 so as to be movable in the left-right direction, a rotor (a "second rotor" in the claims) 42 extending in the left-right direction and rotatably fixed to a stay 41A standing on the upper surface of the support member 41 at a predetermined interval in the left-right direction, and two lifters 43 fixed to the rotor 42 and provided at a predetermined interval in the left-right direction. In addition, in a side view, the lifter 43 is formed with a rearward upward inclination. This allows the tip of the lifter 43 to move efficiently in the up-down direction along the unevenness of the field.

[0041] As shown in Figs. 8 and 9, the rotating body 42 of the lifter device 40 provided on the left side is rotatably fixed to a stay 41A that stands on the upper surface of the support member 41 at a predetermined interval in the left-right direction. The rotating body 42 is fitted on a connecting shaft 45 that extends rightward from the right end of a rotating body (the "first rotating body" in the claims) 44 rotatably fixed to the left wall of the auger frame 30 and has a rectangular or hexagonal polygonal vertical section. This makes it possible to easily adjust the left-right position of the lifter 43 of the lifter device 40 by moving the support member 41 of the lifter device 40 provided on the left side in the left-right direction. It is also possible to fix the left-right position of the lifter 43 of the lifter device 40 by restricting the left-right movement of the support member 41 of the lifter device 40 provided on the left side. This makes it possible to reduce the number of parts. Specifically, the support member 41 and the auger frame 30 are fastened to each other by fastening parts (not shown) such as bolts. Since a long hole is formed in the bottom wall on the auger frame 30 side, the support member 41 can be moved to any position and fixed therein by loosening the fastening parts. In addition, an electric motor (not shown) having a screw shaft on its output shaft may be attached to the auger frame 30, and the female thread into which this screw shaft fits may be attached to the support member 41, so that the electric motor can move the support member 41 in the left-right direction.

[0042] Similarly, the rotating body 42 of the lifter device 40 provided on the right side is rotatably fixed to a stay 41A that stands on the upper surface of the support member 41 at a predetermined interval in the left-right direction. The rotating body 42 is fitted onto a connecting shaft 45 that extends rightward from the left end of a rotating body 44 rotatably fixed to the right wall of the auger frame 30 and has a rectangular or hexagonal polygonal vertical cross section. This makes it possible to easily adjust the left-right position of the lifter 43 of the lifter device 40 by moving the support member 41 of the lifter device 40 provided on the right side in the left-right direction.

[0043] In front view, it is preferable to position the left lifter 43 of the lifter device 40 provided on the left side at the center in the left-right direction of the left crawler of the traveling device 2, and the right lifter 43 of the lifter device 40 provided on the right side at the center in the left-right direction of the right crawler of the traveling device 2. In this way, as shown in Fig. 10, the left and right lifters 43 visible to the operator from the control unit 5 are aligned with the center of the ridges in the field, and the crawlers provided on the left and right sides of the traveling device 2 can be made to travel along the ridges, allowing efficient harvesting of stalks in the field.

[0044] The left part of the left rotating body 44 extends leftward beyond the left wall of the auger frame 30, and a measuring member 46 extending rearward is provided on the left part of the rotating body 44, and a sensor 47 such as an angle sensor is provided on the rear part of the measuring member 46 for detecting the amount of vertical movement of the rear part of the measuring member 46. This makes it possible to measure the unevenness of the field via the left lifter device 40, and to appropriately move the pre-cutting treatment device 3 up and down depending on the unevenness of the field, thereby allowing the lifter 43 to appropriately scoop up the field and the blade device 3 to appropriately cut the field.

[0045] Similarly, the right part of the right rotating body 44 extends to the right beyond the right wall of the auger frame 30, and a measuring member 46 extending rearward is provided on the right part of the rotating body 44, and a sensor 47 such as an angle sensor that detects the amount of vertical movement of the rear part of the measuring member 46 is provided on the rear part of the measuring member 46. This makes it possible to measure the unevenness of the field via the right lifter device 40, and to appropriately move the pre-cutting treatment device 3 up and down depending on the unevenness of the field, thereby allowing the lifter 43 to appropriately scoop up the field and the blade device 3 to appropriately cut the field.

[0046] The vertical movement control of the pre-harvesting processing device 3 may be performed using the value of the sensor 47 on the left side of the left-side rotating body 44, or the value of the sensor 47 on the right side of the right-side rotating body 44, or the average value of the left and right sensors 47, 47. Furthermore, the pre-harvest treatment device 3 is moved up and down by driving a lifting device (not shown) such as a hydraulic cylinder that moves the feeder house 3D up and down. This makes it possible to prevent the lifter 43 from crashing into the field.

[0047] 11 and 12, the lifter 43 is formed of an upper lifter 50 made of round steel or the like, a lower lifter 51 made of round steel or the like, and a connecting member 52 made of round steel or the like that connects the rear lower part of the upper lifter 50 and the upper front end part of the lower lifter 51. This makes it possible to prevent the stalks planted in the field from becoming entangled with the lifter 43.

[0048] A tip lifter 53 made of round steel or the like having a smaller diameter than the upper lifter 50 is provided at the tip of the upper lifter 50. In a side view, the front side of the tip lifter 53 is formed with a steeper upward rearward inclination than the upper lifter 50, the rear part of the tip lifter 53 is fixed to the upper surface of the front part of the upper lifter 50, and the front part of the tip lifter 53 is formed with an upward rearward inclination with an inclination angle larger than the upward rearward inclination of the upper lifter 50. As a result, when the lifter 43 hits a convex part of the field, the tip lifter 53 deforms, and deformation of the upper lifter 50 can be suppressed.

[0049] The tip of the tip lifter 53 is formed into a spherical body 54 having a predetermined diameter, which can prevent the tip of the tip lifter 53 from hitting a convex part of the farm field.

[0050] In a side view, the lower part of the upper lifter 50 and the front part of the connecting member 52 are connected by a substantially triangular connecting plate 55. This increases the rigidity of the upper lifter 50 and the connecting member 52, thereby making it possible to suppress deformation of the upper lifter 50 and the connecting member 52.

[0051] A sled 56 that comes into contact with the field surface is provided on the lower part of the connecting plate 55. The lower part of the sled 56 is formed on a circular arc in a vertical cross section in the left-right direction. This allows the upper lifter 50, the tip lifter 53, etc. to move smoothly in the front-rear direction along the unevenness of the field.

[0052] (Lifter device of second embodiment) 13 to 15 show a lifter device 40 of a second embodiment. Note that the same members as those in the lifter device 40 of the first embodiment are given the same reference numerals and the description thereof will be omitted.

[0053] A rectangular detection body 60 for detecting the stumps transported from the raking device 3A to the auger device 3C is provided on the front part of the left surface of the connecting plate 55 of the left lifter 43, and a sensor 61 such as a displacement sensor for detecting the deformation amount of the detection body 60 (the "first sensor" in the claims) is provided on the rear part of the left surface of the connecting plate 55. When an external force is applied to the detection body 60 from the stump, the detection body 60 presses the sensor 61.

[0054] Similarly, a rectangular detection body 60 is provided at the front part of the right side of the connecting plate 55 of the right lifter 43 for detecting the grain stalk transported from the scraping device 3A to the auger device 3C, and a sensor 61 such as a displacement sensor for detecting the amount of deformation of the detection body 60 is provided at the rear part of the right side of the connecting plate 55.

[0055] As a result, for example, if the detection body 60 on the left lifter 43 is deformed by the stalks transported to the auger device 3C and the sensor 61 is pressed down for a predetermined time or more, but the detection body 60 on the right lifter 43 is not deformed and the sensor 61 is not pressed down for a predetermined time or more, an alarm (not shown) on the steering unit 5 is sounded. This allows the operator to steer the multi-purpose combine quickly so that the stalks can be raked in evenly over the entire area of ​​the raking device 3A. When the detector 60 on the left lifter 43 is deformed and the sensor 61 is pressed down for a predetermined time or more, and when the detector 60 on the right lifter 43 is not deformed and the sensor 61 is not pressed down for a predetermined time or more, the combine is steered leftward until the alarm from the alarm stops. When the detector 60 on the right lifter 43 is deformed and the sensor 61 is pressed down for a predetermined time or more, and when the detector 60 on the left lifter 43 is not deformed and the sensor 61 is not pressed down for a predetermined time or more, the combine is steered rightward until the alarm from the alarm stops. This allows the crawlers of the traveling device 2 to travel efficiently along the ridges on which the stalks are planted. Steering of such a combine harvester may be performed manually by an operator or automatically (automatic direction control).

[0056] FIG. 15 shows a configuration in which the detection body 60 and the sensor 61 are provided on the lifter 43 of the left lifter device 40, but the detection body 60 and the sensor 61 can also be provided on the lifter 43 of the right lifter device 40.

[0057] (Lifter device of third embodiment) 16 to 18 show a lifter device 40 of a third embodiment. Note that the same members as those in the lifter device 40 of the first embodiment are given the same reference numerals and the description thereof will be omitted.

[0058] A support shaft 65 extending downward is formed at the front of the upper lifter 50 of the left lifter 43. A biasing member 66 such as a torque spring is fitted onto the support shaft 65, one side of which engages with the upper lifter 50 and the other side of which engages with the front of a sled 67. A sensor 68 such as a displacement sensor (referred to as a "second sensor" in the claims) for detecting the amount of movement of the sled 67 is provided at the rear of the right surface of the connecting plate 55 of the left lifter 43. The sled 67 is rotatably fixed to the support shaft 65 via the biasing member 66, and is not fixed to the lower part of the connecting plate 55. When an external force from the stalk is applied to the sled 67, the sled 67 presses down on the sensor 68.

[0059] Similarly, a support shaft 65 extending downward is formed at the front part of the upper lifter 50 of the right lifter 43. A biasing member 66 is fitted onto the support shaft 65, one side of the biasing member 66 engaging with the upper lifter 50 and the other side of the biasing member 66 engaging with the front part of a sled 67. A sensor 68 such as a displacement sensor for detecting the amount of movement of the sled 67 is provided at the rear part of the left surface of the connecting plate 55 of the right lifter 43.

[0060] This allows the number of parts to be reduced by utilizing the sled 67 as a detector for detecting the stalks. For example, when the sled 67 provided on the left lifter 43 is moved by the stalks transported to the auger device 3C and the sensor 68 is pressed down for a predetermined time or more, but the sled 67 provided on the right lifter 43 is not moved and the sensor 68 is not pressed down for a predetermined time or more, an alarm (not shown) provided on the steering unit 5 is sounded. This allows the operator to steer the general-purpose combine quickly so that the stalks can be raked evenly over the entire area of ​​the raking device 3A. When the sensor 68 provided on the left lifter 43 is pressed down for a predetermined time or more and the sensor 68 provided on the right lifter 43 is not pressed down for a predetermined time or more, the combine is steered leftward until the alarm from the alarm stops. When the sensor 68 on the right lifter 43 is pressed down for a predetermined time or more and the sensor 68 on the left lifter 43 is not pressed down for a predetermined time or more, the combine is steered to the right until the alarm from the alarm stops. This allows the crawlers of the traveling device 2 to travel efficiently along the ridges on which the culms are planted. Steering of such a combine harvester may be performed manually by an operator or automatically (automatic direction control). 11, the sled 67 can be used to detect unevenness in the field with the sensor 47 and move the pre-harvesting treatment device 3 up and down. In other words, the sled 67 is configured to be able to both correct the direction of the combine and adjust the pre-harvesting treatment device 3 up and down.

[0061] Figure 18 illustrates a configuration in which a sled 67 and a sensor 68 serving as detection bodies are provided on a pair of left and right lifters 43 of the left lifter device 40 and a pair of left and right lifters 43 of the right lifter device 40, but a configuration in which the sled 67 and the sensor 68 are provided only on the pair of left and right lifters 43 of the left lifter device 40 may also be used.

[0062] <Feeder House> The feeder house 3D is a device that connects the auger device 3C and the threshing device 4, and transports the stalks (material to be processed) transported to the left part of the auger frame 30 to the threshing device 4. [Explanation of symbols]

[0063] 1 Aircraft frame 2 Running gear 3. Pre-harvest processing equipment 3A Scraping device 3B Cutting blade device 3C Auger Equipment 3D Feeder House 4. Threshing Equipment 30 Ogre Frame 31 Scraping Auger 34B Sweeping Finger 40 Lifter device 41 Support member 42 Rotating body (second rotating body) 43 Lifter 44 Rotating body (first rotating body) 45 Connecting shaft 50 Upper Lifter 51 Lower lifter 52 Connecting member 55 Connecting plate 60 Detected object 61 Sensor (First Sensor) 65 Spindle 67 Sled 68 Sensor (Second Sensor)

Claims

1. A combine harvester having a traveling device (2) provided under a machine frame (1), a pre-harvesting device (3) provided in front of the machine frame (1), and a threshing device (4) provided behind the pre-harvesting device (3), The pre-harvesting treatment device (3) is composed of a raking device (3A) that transports the culms in the field to the rear while standing them up, a cutting blade device (3B) that cuts the bases of the transported culms, an auger device (3C) that gathers the transported culms to one side, and a feeder house (3D) that transports the gathered culms to a threshing device (4), The auger device (3C) is formed of an auger frame (30) having an open front and top, and a raking auger (31) installed on the left and right walls of the auger frame (30), A pair of left and right lifter devices (40) are provided on the upper surface of the lower wall of the auger frame (30) at a predetermined interval in the left and right direction, a first rotor (44) rotatably supported on the left and right walls of the auger frame (30); The lifter device (40) comprises a support member (41) provided on the upper surface of the lower wall of the auger frame (30) so as to be movable in the left-right direction, a second rotating body (42) supported rotatably on the support member (41), and a pair of left and right lifters (43) extending forward from the second rotating body (42) at a predetermined interval in the left-right direction, A combine harvester characterized in that the second rotating body (42) is externally fitted onto a connecting shaft (45) extending from the first rotating body (44) toward the second rotating body (42) so as to be movable in the left-right direction.

2. 2. The combine harvester according to claim 1, wherein a support member (41) of the left lifter device (40) is fixed to an upper surface of the lower wall of the auger frame (30) to restrict movement in the left-right direction.

3. 3. A combine harvester according to claim 1 or 2, wherein the cross section of the connecting shaft (45) is formed into a polygonal shape.

4. The lifter (43) is formed of an upper lifter (50) extending in the front-rear direction, a lower lifter (51) extending in the front-rear direction, a connecting member (52) connecting a rear portion of the upper lifter (50) to a front portion of the lower lifter (51), and a connecting plate (55) connecting a lower portion of the upper lifter (50) to a front portion of the connecting member (52), 2. A combine harvester as claimed in claim 1, further comprising a rectangular detection body (60) on an inner surface of the connecting plate (55) for contacting the stalks and a first sensor (61) for measuring the deformation of the detection body (60).

5. The lifter (43) is formed of an upper lifter (50) extending in the front-rear direction, a lower lifter (51) extending in the front-rear direction, a connecting member (52) connecting a rear portion of the upper lifter (50) to a front portion of the lower lifter (51), and a connecting plate (55) connecting a lower portion of the upper lifter (50) to a front portion of the connecting member (52), A front part of a sled (67) that slides on a field surface is rotatably supported on a support shaft (65) that extends downward from the front part of the upper lifter (50), 2. The combine harvester according to claim 1, further comprising a second sensor (68) provided on an inner surface of the connecting plate (55) for measuring the amount of movement of the rear portion of the sled (67).

6. A combine harvester as described in claim 1, wherein, in a plan view, a raking finger (34B) for raking in the straw transported to the outer peripheral surface of the raking auger (31) is provided at the left-right middle of the lifter (43) of the right-side lifter device (40).

7. 7. The combine harvester according to claim 6, wherein the left lifter (43) of the left lifter device (40) is disposed above the center in the left-right direction of the left crawler of the traveling device (2) in a front view.

8. 8. The combine harvester according to claim 7, wherein, in a front view, the right lifter (43) of the right lifter device (40) is disposed above the center in the left-right direction of the right crawler of the traveling device (2).

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