Chinese yam harvester connected to tractor

Abstract

To improve a rotating conveyor device to prevent damage or breakage of Chinese yams caused by compression of culture soil blocks and back pressure.SOLUTION: A Chinese yam harvester connected to a tractor comprises: a mounting frame attached to the rear part of the tractor by a three-point link; a machine frame body connected to the mounting frame; and a support bar that is fixed to a digging blade body and connected to the machine frame body. The machine frame body is configured to be raised and lowered by the three-point link. In a harvester that grips the Chinese yam together with the culture soil around the Chinese yam in a block shape and excavates the Chinese yam while lifting it rearward, a rotating conveyor device is placed on the upper surface of a digging frame. The rotating conveyor device comprises a plurality of rows of transverse rollers on a pair of support frames, and an endless belt stretched over the rollers. The tip ends of the support frames are formed to be foldable upward, and packing covers that are always pressed into close contact are provided at both ends of the endless belt.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a harvester that is connected to the rear of a tractor, hoes the lower end of a long grown digging blade body, holds it in a block shape together with the cultivation soil around the long object, and floats it backward. In particular, it relates to a packing cover for preventing soil and sand from entering a rotating conveyor device that occurs when the long object floats.

Background Art

[0002] Various long object harvesting devices have been proposed conventionally. The grown long object grows to a depth of about 1 meter underground. When harvesting the grown long object, the long object is easily broken and the skin on the outer peripheral surface is easily scratched. Further, as a harvester that tries to dig up a long object by hoeing the lower end of the long object with a digging blade body and holding it in a block shape together with the cultivation soil around the long object and floating it backward, Japanese Patent Application Laid-Open No. 2006-25601 (Patent Document 1) by the same applicant has been proposed. The above publication discloses the configuration of "a long object digging device having a pair of hoe members that are connected to the rear of a tractor and dig up the cultivation soil on both sides of a long object as the tractor moves forward, and a digging blade body that is rotatably connected to the lower center of the pair of hoe members, with the front part forming a blade part and the rear part being inclined upward. In the long object digging device, the connection between the digging blade body and the hoe member is supported by a pair of connection bars, one end of the connection bar is fixed to the lower end of the hoe member, and the other end of the connection bar is rotatably attached to a support shaft provided on the back surface of the digging blade body, and the connection bar is arranged so as to be completely hidden by the back surface of the digging blade body." The effect is that the back pressure resistance from the excavated soil received when the tractor pulls the long object digging device is reduced, so that even a relatively small tractor can be pulled. Also, as a technology of "a harvesting machine that shovels into the lower end of the long part where the digging blade body has grown, holds it in a block shape together with the cultivated soil around the long part, and floats it backward. In particular, a soil pressure reduction self-rotating conveyor device that reduces scratches caused by soil pressure generated when the long object floats backward", Japanese Patent Application No. 2023-34095 has been filed by the same applicant.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] The first cited example described above is suitable for high-speed operations by large 100-150 class high-horsepower tractors that have become popular in recent years. However, when the digging blade body shoveled into the bottom of the grown long object slides the long object backward, it may compress the cultivated soil block, and the back pressure may collapse the earth and sand and scratch the surface of the burdock. The second cited example is one in which a self-rotating conveyor device is arranged in the digging part in order to further reduce the compression of the cultivated soil block and the back pressure according to the configuration of the first cited example. However, in the second cited example, in the digging operation in the soil at a depth of around 1 meter by a large 100 to 150 horsepower tractor that has become popular in recent years, there is an entry of earth and sand from the gap of the endless belt of the self-rotating conveyor device, and a problem has occurred that long-term operation becomes difficult.

Means for Solving the Problems

[0005] The present invention has a problem that earth and sand enters from the gap of the rotating conveyor device of the above-described digging part, making it difficult for the endless belt to rotate. To solve this problem, a mounting frame is connected to the rear part of the tractor by a three-point link formed by a top link and left and right lower links. A machine frame body is connected to the mounting frame, and a support bar to which a digging blade body composed of a blade body, a digging plate frame, and a vibrating plate is fixed is connected to the machine frame body. The machine frame body is configured to be able to move up and down by a three-point link. In a harvester that digs long objects by driving the above-described digging blade body into the lower end of the long object, holding it in a block shape together with the cultivation soil around the long object, and lifting it backward, a rotating conveyor device is placed on the upper surface of the digging frame. This rotating conveyor device has multiple rows of horizontal rollers installed on a pair of support frames, and an endless belt is stretched over the upper surface thereof. The tip of the support frame is formed so as to be foldable upward, and packing covers that always press and adhere to both ends of the endless belt are provided. It is a long object harvester connected to a tractor, characterized in that Further, in the long object harvester connected to the tractor, a drain groove roller having a groove for draining the earth and sand staying inside is provided at the lower end of the rotating conveyor device. Long object harvester connected to a tractor Further, in the long object harvester connected to the tractor, a sliding plate on a thin plate is arranged on the lower surface of the packing cover, and a sponge seal is placed on the upper surface thereof and fixed by a pressing plate to always press the upper surface of the endless belt.

Effect of the Invention

[0006] As described above, since the blade part of the digging blade body is provided with a packing cover that stabs into the lower end of the long object and always presses and adheres to the endless belt, the back pressure generated when lifting the cultivation soil block and the surrounding compressed earth pressure are reduced over a long period of time, and the scratches on the long object are reduced. In addition, since the tip of the support frame of the endless belt is made foldable, any remaining earth and sand can be easily swept out in a short time, improving the field workability. In addition, a packing cover that adheres closely is provided to constantly press the upper surface of the endless belt, enabling long-term operation in the soil. Further, at the lower end of the rotary conveyor device, a relief groove roller having a groove through which the soil and sand staying inside escape is provided, so that even if soil and sand get mixed in, they will not adhere to the roller and ride up. Also, a sliding plate on a thin plate is arranged on the lower surface of the packing cover, a sponge seal is placed on its upper surface and fixed by a pressing plate, and the upper surface of the endless belt is constantly pressed by the elastic repulsive force of the sponge seal, so that there is no intrusion of soil and sand and long-term operation is possible.

Brief Description of the Drawings

[0007]

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Embodiments for Carrying Out the Invention

[0008] An embodiment of the present invention is a long vegetable harvester connected to a tractor, which includes a mounting frame connected by a three-point link formed by a top link and left and right lower links at the rear of the tractor. The mounting frame is connected to a machine frame body, and a support bar with a digging blade body composed of a blade body, a digging plate frame, and a vibrating plate is connected to the machine frame body. The machine frame body is configured to be liftable by a three-point link. The above-described digging blade body is dug into the lower end of the long grown vegetable, and while holding it in a block shape together with the cultivated soil around the long vegetable and floating it backward, the long vegetable is dug. On the upper surface of the digging frame, a rotating conveyor device is placed. This rotating conveyor device is provided with multiple rows of horizontal rollers on a pair of support frames, and an endless belt is passed over the upper surface thereof. The tip of the support frame is formed to be foldable upward, and packing covers that always press and adhere to both ends of the endless belt are provided. Moreover, a long vegetable harvester connected to a tractor, wherein a discharge groove roller having a groove for discharging sediment staying inside is provided at the lower end of the rotating conveyor device. Moreover, a long vegetable harvester connected to a tractor, wherein a sliding plate on a thin plate is arranged on the lower surface of the above-described packing cover, and a sponge seal is placed on the upper surface thereof and fixed by a pressing plate to always press the upper surface of the endless belt.

Example

[0009] In Figure 1, reference numeral 1 indicates the rear part of a four-wheel tractor for passenger use. The front part of a machine frame body 3 that supports a digging part 23 by a three-point link 2 is connected to the rear part of this tractor. Reference numeral 12 indicates a mounting frame, and a top bracket 4 is provided at the central top thereof and is supported so as to be rotatable in the front-rear direction with support shafts 6 fixed to both sides in front of the machine frame body 3 as fulcrums. Reference numeral 7 is a top link support unit that supports the top bracket 4 of 4. A top link 46 known with respect to the tractor is connected in front of the top bracket 4. Reference numeral 8 indicates a support bar with a vertically long cross-section and is attached downward to the left and right of the machine frame body 3. A digging part 23 inclined rearward is installed at the lower end parts of a pair of support bars 8. The digging blade body 9 of the digging part 23 is provided with a blade body 10 at its tip, a self-propelled conveyor device 49 is provided on the upper surface of a digging frame 9-1 at its middle part, and further a vibrating plate 11 is provided at its rear half part and is formed such that the vibrating plate 11 is slightly vibrated by a second hydraulic motor 22. Reference numeral 19 indicates a cleaner that removes the upper surface part of a cultivated soil block lifted rearward by the digging blade body 9 to the left and right and projects a long neck. The cleaner 19 swings left and right perpendicular to the traveling direction by a first motor 18. Reference numeral 24 is a lift cylinder that raises and lowers the posture of the digging blade body 9 supported by the machine frame body 3 with respect to the mounting frame 12 by its expansion and contraction with the support shaft 6 as a fulcrum. In particular, it is for lifting the digging part 23 in the ground to the ground and securing its ground height. Reference numeral 44 indicates a hydraulic arm equipped on the tractor, which raises and lowers the lower link 25 vertically. Reference numeral 45 indicates a lift stay provided at the rear of the machine frame 3, which is connected to the top of the mounting frame 12 via a lift cylinder 24. Reference numeral 49 is provided on the upper part of a digging frame 9-1 installed between a blade 10 forming a digging blade body 9 and a diaphragm 11 of a rotary conveyor device, and their surfaces are formed on the same plane. Reference numeral 53 is a rotating link. Therefore, when harvesting long crops in the soil, first, the blade 10 is inserted under the long crop and advances, starting to float while forming a cultivated soil block. The endless belt 50 of the rotary conveyor device 49 rotates and rises under the soil pressure of the cultivated soil. At this time, the rotation of the endless belt 50 reduces the soil pressure, and further, the vibration of the diaphragm 11 releases the cultivated soil block, and the neck of the floating long crop protrudes for the operator to grip. Figure 2 is a plan view with a part of the present invention omitted. Reference numeral 46 indicates a top link and 25 indicates a lower link, which constitute a three-point link. The top link 46 is connected to the top bracket 7 of the mounting frame 12, and the lower link 25 is connected to both front sides of the machine frame 3. Reference numeral 5 indicates a PTO output shaft provided at the rear of the tractor, which directly drives a hydraulic pump 18, and a hose 17 is provided for transmission to a hydraulic motor on the digging part side. The hydraulic pump 16 drives a first motor 18 and a second motor 22. The first motor 18 is connected to means for swinging a cleaner 19 left and right. The second hydraulic motor 22 vibrates the diaphragm 11 in the rear half of the digging body 9. The rotary conveyor device 49 forming the digging part 23 is arranged to be inclined back and forth inside the support bar 8. Reference numeral 55 indicates a packing cover, which prevents sediment from entering through the gap between the endless belt 50 of the rotary conveyor device 49 and the support frame 52. Reference numerals 20 and 47 indicate a horizontal shaft -1 and a horizontal shaft -2 respectively, which are horizontally installed on the machine frame 3. Reference numeral 21 is a pipe shaft configured to be slidable with respect to the horizontally installed horizontal shaft -1 and horizontal shaft -2.

[0010] Figure 3 shows a front view of the excavation progress of long crops. At both sides of the excavation frame 9-1 forming the excavation blade body 9, the lower ends of the vertically elongated support bars 8 are fixed. The base of the support bar 8 is fixed to 21 pipe shafts. The pipe shafts 21 are formed to be slidable on 20 horizontal shafts -1. The excavation blade body 9 is provided with a blade body 10 at the tip, and the rear part is inclined upward together with 49 self-propelled conveyor devices, and further, a vibrating plate 11 that is slightly vibrated is connected to the rear end. 55 indicates a packing cover, which prevents earth and sand from entering the inside of the self-propelled conveyor device 49. 15 indicates a slide cylinder, one end of which is fixed to the side of the machine frame body 3, and the other end is connected to the pipe shaft 21. An excavation part 23 is provided at the lower part of this pipe shaft 21 and slides left and right as desired. 7 indicates a top link support unit, which is arranged at the top of the mounting frame via a share bolt 32. The top bracket 4 is formed to be rotatable back and forth and is arbitrarily fixed by a stopper pin 41. One share bolt 32 is arranged in the vertical direction. 31 indicates long crops, and it is in a state of rising together with the block-shaped cultivated soil by the propulsion of the excavation blade body 9 and the excavation of the left and right support bars 8. The excavation blade body 9 is supported by the support bar 8, and the horizontal shafts -1 and 2 are slid by the expansion and contraction of the slide cylinder 15 to align with the center position of the long crop ridge. Figure 4 is an explanatory diagram of the lifting and lowering of the excavation part. The entire machine frame body 3 and the excavation part 23 are lifted and lowered vertically by the three-point link 2 at the rear of the tractor, and the excavation part 23 rises while further rotating with respect to the mounting frame 12 by the expansion and contraction of 24 lift cylinders, and the excavation blade body 9 comes out of the ground and has a certain ground height. At this time, when the ground height is insufficient depending on the tractor model and manufacturer, it is advisable to further rotate the top bracket 4 of the top link support unit 7 backward to move the fulcrum of the top link 46 backward. Also, using a means of sliding up and down by arranging a hydraulic cylinder in the vertical direction for the excavation part 23 with respect to the machine frame body 3 does not deviate from the gist of the present invention. FIG. 5 is an explanatory diagram of the operation of the top link support unit 7, and FIG. 6 is a perspective view of the top link support unit 7. Together, the configuration will be described. Reference numeral 43 denotes a pedestal box with an L-shaped cross-section on the side, which is welded to the top of the mounting frame 12 and rotatably supports the support case 42 by the base shaft 39. Reference numeral 4 denotes a top bracket, which is rotatably supported by a lateral pin 40 with respect to the support case of 42. Reference numeral 41 denotes a stopper pin, which is slidably attached to the support case 42 and serves as a stopper when it is removed when the top bracket 6 moves back and forth and inserted when the front and rear positions are determined. Reference numeral 32 denotes a shared bolt that fixes the bottom plate of the pedestal box 43 and the bottom plate 49 of the support case 42. One shared bolt 32 is arranged vertically at the top of the mounting frame 12, and its breaking strength is set to cut just before the body frame is damaged. Reference numeral 43 denotes a contact surface - 1, which is a position fixing surface when the top bracket 4 is tilted forward. Reference numeral 48 in FIG. 5 denotes a contact surface - 2, which is a position fixing surface when the top bracket 4 is tilted backward. The shared bolt 32 is set in advance to be slightly weaker than the strength of the horizontal axis of the body frame when an impact force such as that of a rock occurs in the digging and excavating part 23 and the lift cylinder 24. Therefore, when the digging part 23 collides with a rock buried underground, the shared bolt 32 is cut first rather than the body frame or the lift cylinder 24, protecting the body from damage. In the unlikely event that the shared bolt 32 is cut, simply remove the obstacle such as a rock, operate the top link 46, and replace the shared bolt 32 to restore it. FIG. 7 shows an explanatory diagram of the drive of the cleaner 19. The drive sprocket 29 attached to the output shaft of the first hydraulic motor 18 described above rotates a driven sprocket 34 that is appropriately decelerated. The scraping bar 38 of the cleaner 19 is rotatably supported by the boss shaft 36 of the fulcrum shaft 37. The scraping bar 38 is swung left and right by a connecting rod 35 connected to the driven sprocket 34, sweeping the surface of the cultivated soil that rises during digging from side to side to protrude the necks of long objects. Fig. 8 shows an explanatory diagram of the drive of the diaphragm 11, where 11 is the rear surface of the diaphragm. 22 shows the second hydraulic motor, which is connected by the hose 17 conducted from the above-mentioned hydraulic pump 18. The above-mentioned second hydraulic motor is fixed to the stay 27, and the diaphragm 11 is vibrated up and down via the connecting rod 28 by the rotation of the eccentric shaft 26. The cleaner 19 and the diaphragm 11 are transmitted via a hose from the hydraulic pump 18 equipped on the tractor side. Fig. 9 is an explanatory diagram of conventional digging. The digging blade body 9 supported by the support bar 8 includes the blade body 10 at the tip, the digging frame 9-1 in the middle part, and a digging resin plate 9-2 is placed on the upper surface of this digging frame 9-1, and a diaphragm 11 is provided in the latter half. This figure is a state diagram in which the cultivated soil block 56 slides (→B) and floats on the upper surface of the digging resin plate 9-2 as the tractor advances. In the conventional case, when the soil quality is hard or the growth of the burdock is large, back pressure is generated by the frictional reaction force on the cultivated soil block 56 during the sliding (B) of the digging resin plate 9-2, and the cultivated soil block 56 may collapse, the burdock may collapse, and scratches or breakage may occur on the surface. Fig. 10 shows a perspective view of the novel rotary conveyor device. 10 is the blade body, 49 is the rotary conveyor device, and 11 is the diaphragm. The diaphragm 11 is driven by the second hydraulic motor 22. The rotary conveyor device 49 arranges multiple rows of horizontal rollers 51 on the left and right support frames 52, and is rotatably fixed by the set screw 54, and an endless belt 50 is wound around its outer periphery. 55 shows the packing cover, which is a cover for preventing the intrusion of sediment into the gap between the left and right support frames 49 and the endless belt 50. Therefore, when the long burdock digger equipped with this device enters the soil and advances, the endless belt of the rotary conveyor device 49 of 49 slides while floating together with the cultivated soil block 56 holding the long burdock. That is, when a frictional force is generated on the surface of the endless belt 50, the horizontal roller 51 rotates, and the cultivated soil block floats along with the sliding of the endless belt 50. Therefore, since the frictional reaction force of the conventional digging resin plate does not occur, there are few scratches on the surface of the burdock. Fig. 11 shows a perspective view of the tip rotating part of the self-rotating conveyor device 49 showing the main points of the present invention. An appropriate number of horizontal rollers 51 are arranged on the 52 support frames located on the left and right, and the tip parts thereof are connected via rotation links 53 on the left and right and can be folded. 55 is a packing cover that excludes the earth and sand that tries to enter from the gap between the endless belt 50 and the support frame 52 when the self-rotating conveyor device 49 digs in the soil. The packing cover 55 is composed of the sliding plate 61, sponge seal 62, and pressing plate 60 shown in Fig. 13 and is fixed to the 57 fasteners by lock screws 63 and is in contact with the surface of the endless belt 50. 57 indicates a horizontal contact member that supports both the left and right ends of the endless belt 50 and regulates slack. 57 indicates a support fitting that fixes the packing cover 50. 51-1 indicates a relief groove roller, which is arranged at the lower end of the self-rotating conveyor device 49. In the unlikely event that earth and sand are mixed in, the earth and sand staying on the lower end side escapes from the roller groove of the relief groove roller 51-1 and does not adhere to the outer periphery of the horizontal roller, so the endless belt is not tensioned and locked. Also, when earth and sand are mixed in and stay inside due to long-term use in the soil, it is folded with the rotation link 53 as a fulcrum and discharged and cleaned. Fig. 12 is an explanatory diagram of the tip folding of the self-rotating conveyor device 49. When earth and sand are mixed inside the endless belt 50 described above, the packing cover 55 is removed from the support fitting 57, and further, the rotation link of 53 is loosened and folded upward. By folding the tip part in this way, the endless belt 50 can be opened and the earth and sand can be easily discharged and cleaned from the inside. Figure 13 is an explanatory perspective view of the packing cover 55. A pair of support frames 52 are formed in a box shape, and a plurality of horizontal rollers 51 are arranged in multiple rows on the left and right. The horizontal rollers 51 are rotated by the left and right receiving shafts 59. The receiving shafts 59 are fixed to the support frames 52 with set screws 54. 50 indicates an endless belt, which is stretched around the outer peripheries of the plurality of horizontal rollers 51 described above. 57 indicates a horizontal pressing member, which is provided inside the support frame 52 and contacts both the left and right ends of the endless belt 50 to regulate the slack and maintain the horizontal state. 55 indicates the packing cover, and 61 is composed of a thin plate-shaped sliding plate, a sponge seal 62, and a pressing plate 60. The sliding plate 61 is always fixed to the retaining metal fitting 58 with a lock screw 63 in a state of being in close contact with the surface of the endless belt 50. The sponge seal 62 is rubber-like with elastic force and restoring force and always presses against the upper surface of the endless belt. This packing cover 55 is held in a state where the sponge seal 62 is appropriately pressed against the upper surfaces of the horizontal pressing members 57 located at both ends of the endless belt, so that the thin plate-shaped sliding plate 61 is always pressed against and in close contact with the upper surface of the endless belt 50. Figure 14 is a cross-sectional view showing the close contact state of the packing cover 55. 57 indicates a horizontal pressing member located at the lower parts of both ends of the endless belt to maintain the slack horizontally. The sliding plate 61 is in close contact with the upper surface of the endless belt 50 held horizontally by this horizontal pressing member 57. The sponge seal 62 is placed on this upper surface, and further, the pressing plate 60 is placed on this, and the lock screw 63 is fixed to the retaining metal fitting 63. Therefore, the sliding plate 61 of the packing cover 55 is always pressed against and in close contact with the upper surface of the endless belt 50. Therefore, the gaps between both ends of the endless belt 50 and the support frame 52 are always in close contact and covered, preventing the intrusion of earth and sand. Figure 15 shows an explanatory diagram of the slack of an endless belt. The endless belt 50 rotates in the upward (F) direction when digging up long radishes. That is, when the above-mentioned cultivation soil block moves up and down together with the endless belt, the horizontal roller 51 rotates, reducing the frictional force and back pressure. However, slack (f1) occurs at both ends of the endless belt between adjacent rollers as shown by the dotted line, creating a gap. The horizontal abutment member 57 is used to regulate this slack in advance and maintain the close contact between the endless belt and the packing cover 55. Therefore, even during the long-term harvesting of long crops in the soil, the levels at both ends of the endless belt 50 are maintained, ensuring pressure bonding and sealing from the packing cover 55, preventing the intrusion of soil and sand, and enabling a comfortable harvesting operation.

[0008]

Industrial Applicability

[0011] The long crop digging device connected to the tractor according to the present invention installs a rotating conveyor device provided with the packing cover of the present invention, reducing the digging load while decreasing long crop breakage and scratches, and being efficient even in the fields of large-scale professional farmers.

[0012]

Explanation of Reference Numerals

[0012] 1 Rear part of tractor 2 Three-point link 3 Machine frame body 4 Top bracket 5 PTO output shaft 6 Support shaft 7 Top link support unit 8 Support bar 9 Digging blade body 9-1 Digging frame 9-2 Digging resin plate 10 Blade body 11 Vibration plate 12 Mounting frame 13 Side stay 14 Horizontal shaft - 3 15 Slide cylinder 16 Hydraulic pump 17 Hose 18 First motor 19 Cleaner 20 Horizontal axis - 1 21 Pipe shaft 22 Second motor 23 Excavation part 24 Lift cylinder 25 Lower link 26 Eccentric shaft 27 Stay 28 Connecting member 29 Driving sprocket 31 Long one 32 Share bolt 33 Rotating support shaft 34 Driven sprocket 35 Connecting rod 36 Boss shaft 37 Fulcrum shaft 38 Scratching bar 39 Base shaft 40 Horizontal pin 41 Stopper pin 42 Support case 43 Contact surface - 1 44 Hydraulic arm 45 Lift stay 46 Top link 47 Horizontal axis - 2 48 Contact surface - 2 49 Self - rotating conveyor device 50 Endless belt 51 Horizontal roller 51 - 1 Relief groove roller 52 Support frame 53 Rotating link 54 Set screw 55 Packing cover 56 Cultivated soil block 57 Horizontal abutment member 58 Fastening fitting 59 Receiving shaft 60 Pressing plate 61 Sliding plate 62 Sponge seal 63 Locking screw

Claims

1. A mounting frame connected by a three-point link formed by a top link and left and right lower links at the rear of a tractor, the mounting frame is connected to a machine frame body, and the machine frame body is connected to a support bar fixed with a digging blade body composed of a blade body, a digging plate frame, and a vibrating plate. The machine frame body is configured to be liftable by a three-point link, In a harvester that digs long crops by driving the above-described digging blade body into the lower end of the long grown crops, holding them in a block shape together with the cultivated soil around the long crops, and floating them rearward, a rotating conveyor device is placed on the upper surface of the digging frame, This rotating conveyor device is provided with multiple rows of horizontal rollers on a pair of support frames, and an endless belt is stretched over the upper surface thereof. The tip of the support frame is formed to be foldable upward, and packing covers that always press and adhere to both ends of the endless belt are provided. A long crop harvester connected to a tractor, characterized in that

2. A long crop harvester connected to a tractor according to claim 1, wherein a drain groove roller having a groove for draining sediment staying inside is provided at the lower end of the rotating conveyor device

3. A long crop harvester connected to a tractor according to claim 1, characterized in that a sliding plate on a thin plate is arranged on the lower surface of the above-described packing cover, and a sponge seal is placed on the upper surface thereof and fixed by a pressing plate to always press the upper surface of the endless belt

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