JP2012139113A - Seedling planting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a seedling planting apparatus, and to improve the planting capability.SOLUTION: The seedling planting apparatus includes: a rotator (50) which rotates on the inner peripheral side of a fixing support body (79); a final shaft (82) in the lateral direction rotatably disposed at a position eccentric to the center of rotation of the rotator (50); a seedling planting implement (49) attached to a projecting part of the final shaft projecting from the rotator (50); and a final shaft rotation transmission mechanism for rotating the final shaft (82) relative to the rotator (50) according to the rotation of the rotator (50). The seedling planting apparatus also includes a plurality of support shafts (83) in the lateral direction at positions eccentric to the center of rotation of the rotator (50) and different from the position of the final shaft (82). Bearings (80) attached to the support shafts (83) rotatably support the rotator (50) in contact with the inner periphery of the fixing support body (79).

Description

  This invention belongs to the technical field of a seedling planting device provided in a seedling transplanting machine such as a rice transplanter.

  A rotating body that rotates on the inner peripheral side of the fixed support is provided, a final shaft in the left-right direction is rotatably provided at a position that is eccentric with respect to the rotation center of the rotating body, and a seedling is formed on the protruding portion of the final shaft that protrudes from the rotating body. In a seedling planting apparatus provided with a final shaft rotation transmission mechanism for attaching a planting tool and rotating the final shaft relative to the rotating body as the rotating body rotates, the rotating body is disposed between the fixed support and the rotating body. There is known one provided with a bearing for rotatably supporting the motor. In this seedling planting device, the rotating body is provided with left and right rotating side bodies, a final shaft rotation transmission mechanism is disposed between the left and right rotating side bodies and on the inner peripheral side of the fixed support, and the final shaft rotation The transmission mechanism includes a fixed gear with internal teeth that does not move and a rotating gear that revolves by rotating the rotating body while rotating by meshing with the fixed gear, and transmits from the rotating gear to the final gear that rotates integrally with the final shaft. It is set as the structure (refer patent document 1).

JP 2006-34191 A

  It is an object of the present invention to reduce the size of the seedling planting apparatus and to improve the planting performance.

In order to solve the above problems, the following technical measures were taken.
That is, the invention according to claim 1 is provided with a rotating body (50) that rotates on the inner peripheral side of the fixed support body (79), and is positioned at a position eccentric to the rotation center (51) of the rotating body (50). Direction shaft (82) is rotatably provided, seedling planting tool (49) is attached to the projecting portion of final shaft (82) projecting from rotating body (50), and the rotating body (50) is rotated. In the seedling planting apparatus provided with a final shaft rotation transmission mechanism for rotating the final shaft (82) relative to the rotating body (50), the final position is eccentric with respect to the rotation center (51) of the rotating body (50). A plurality of left and right support shafts (83) are provided at different positions from the shaft (82), and the bearing (80) provided on the support shaft (83) rotates in contact with the inner peripheral portion of the fixed support (79). A seedling planting device that rotatably supported the body (50) was obtained.

  In the invention according to claim 2, the bush (81) is provided on the inner peripheral side of the fixed support body (79), and the support shaft is attached to the contact portion (50b) of the rotating body (50) contacting the bush (81). The seedling planting apparatus according to claim 1, which has been passed through (83).

  According to a third aspect of the present invention, the rotating body (50) includes left and right rotating side bodies (50a), between the left and right rotating side bodies (50a) and within the fixed support body (79). The final shaft rotation transmission mechanism is disposed on the circumferential side, and the left and right ends of the support shaft (83) are respectively fixed to the left and right rotation side bodies (50a) by left and right mounting pins (120, 121). Of the left and right mounting pins (120, 121), the length of the mounting pin (120) disposed on the bush (81) side is longer than the length of the mounting pin (121) disposed on the bearing (80) side. The seedling planting apparatus according to claim 2, wherein the mounting pin (120) disposed on the bush (81) side extends to a position on the inner peripheral side of the bush (81).

  In the invention according to claim 4, in the final shaft rotation transmission mechanism, the final gear (104) that rotates integrally with the final shaft (82) is shifted from the bush (81) in the left-right direction. It was set as the seedling planting apparatus of Claim 2 or Claim 3.

  In the invention according to claim 5, the final gear (104) that rotates integrally with the final shaft (82) in the final shaft rotation transmission mechanism is arranged at the same left and right position as the bearing (80). It was set as the seedling planting apparatus of any one of claim | item 4.

  According to a sixth aspect of the present invention, the rotating body (50) includes left and right rotating side bodies (50a), and one of the left and right rotating side bodies (50a) can be removed. A final shaft rotation transmission mechanism is disposed between the bodies (50a) and on the inner peripheral side of the fixed support body (79). The final shaft rotation transmission mechanism includes a stationary gear (106) that does not move and the fixed gear. A rotating gear (97) that revolves by rotating the rotating body (50) while rotating by meshing with (106) is provided, and from the rotating gear (97) to the final gear (104) that rotates integrally with the final shaft (82). The seedling according to any one of claims 2 to 5, wherein the seedling is configured to transmit, and the fixed gear (106) is configured to fit in a region overlapping with the one of the left and right rotating side bodies (50a) in a side view. A planting device was used.

  In the invention according to claim 7, the rotating body (50) includes left and right rotating side bodies (50a), between the left and right rotating side bodies (50a) and within the fixed support body (79). The final shaft rotation transmission mechanism is disposed on the circumferential side, and the left and right rotation side bodies (50a) can be removed leaving the final shaft rotation transmission mechanism. The seedling planting device was used.

  The invention according to claim 8 is configured such that the tip of the seedling planting tool (49) draws a loop-like operating locus (P) in a side view, and the bottom dead center (B) of the operating locus (P). The upward trajectory from the top dead center to the top dead center operates diagonally rearward and upward from the bottom dead center (B) to the upper and lower middle part (D), and operates diagonally forward and upward from the upper and lower middle part (D) to the top dead center. The seedling planting device according to any one of claims 1 to 7, wherein the planting device has a trajectory that largely changes an operating direction at an upper and lower intermediate portion (D).

  According to the first aspect of the present invention, since the plurality of bearings 80 are provided and the rotating body 50 can be supported appropriately, the rotating body 50 can be appropriately rotated. In addition, since a plurality of support shafts 83 are provided at positions different from the final shaft 82 and the bearings 80 are provided on the support shaft 83, each of the final shaft 82 and the support shaft 83 can be downsized, and the seedling planting apparatus 1 Therefore, the seedling planting apparatus 1 can be operated smoothly.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, the bush 81 is provided, and the support shaft 83 is passed through the contact portion 50 b of the rotating body 50 in contact with the bush 81 to rotate. The body 50 can be stably and properly supported, the concentricity of the fixed support 79 and the rotating body 50 is improved, the sealing performance is improved, and the occurrence of vibration due to the rotation of the rotating body 50 can be suppressed.

  According to the invention of claim 3, in addition to the effect of the invention of claim 2, the mounting pin 120 arranged on the bush 81 side improves the support rigidity of the support shaft 83 near the contact portion 50b, and consequently Since the contact part 50b and the bush 81 are difficult to tilt, the rotating body 50 can be stably and properly supported.

  According to the invention of claim 4, in addition to the effect of the invention of claim 2 or claim 3, the bush 81 can be arranged at a position overlapping the final gear 104 in a side view, and the rotating body 50 and thus the seedling planting device 1 can be reduced in size, the rotational resistance of the rotating body 50 is reduced, and the seedling planting device 1 can be operated smoothly.

  According to the invention according to claim 5, in addition to the effect of the invention according to any one of claims 2 to 4, the part rotated by the rotating body 50 can be made compact, and the lateral width of the part can be reduced. The size of the seedling planting device 1 can be reduced.

  According to the invention according to claim 6, in addition to the effect of the invention according to any one of claims 2 to 5, the fixed gear 106 is attached and detached from the space formed by removing the left and right rotating side bodies 50a. Therefore, maintenance such as replacement of the fixed gear 106 is facilitated.

  According to the invention of claim 7, in addition to the effect of the invention of any one of claims 1 to 6, the left and right rotation side bodies 50a are removed to perform maintenance of the final shaft rotation transmission mechanism. And maintainability is improved.

  According to the invention according to claim 8, in addition to the effect of the invention according to any one of claims 1 to 7, the movement trajectory of the seedling planting tool 49 taking into account the traveling of the aircraft is raised from the bottom dead center. When moving, it can be prevented from moving to the front side, and the planting accuracy can be improved by suppressing the planted seedling from being tilted forward by the seedling planting tool 49.

Side view of riding rice transplanter Top view of riding rice transplanter Partial cross-sectional side view showing a planting clutch The perspective view which shows the structure of front-wheel steering operation by a steering handle Partial cross-sectional side view of the mission case showing the rear wheel rotation sensor Diagram showing image of swivel interlocking control Control block diagram Flow chart of swivel interlocking control Partial cross-sectional side view showing seedling planting device Cross section side view of seedling planting device showing fixed gear, rotating gear and intermediate gear Cross section side view of seedling planting device showing sun gear, planetary gear and final gear Cross-sectional development plan view of seedling planting device Partial cross-sectional side view showing different seedling planting devices

One embodiment of the present invention will be described below. The following embodiment is merely an embodiment and does not restrict the scope of the claims.
1 and 2 show a riding type rice transplanter 2 equipped with a seedling planting device 1. This riding-type rice transplanter 2 is equipped with six-row planting seedlings via a lifting link device 7 behind a traveling vehicle body 6 equipped with an engine 3 and equipped with left and right front wheels 4 and left and right rear wheels 5 that are driven to rotate. Attached portion 8 is connected. A fertilizer application device 9 is provided on the rear side of the traveling vehicle body 6 and on the front side of the seedling planting portion 8. In addition, on both the left and right sides of the front part of the traveling vehicle body 6, the spare seedling platform 10 on which the replenishment seedlings are placed can be rotated between a position protruding sideways from the machine body and a position stored inside. Provided.

  The traveling vehicle body 6 is a four-wheel drive vehicle including left and right front wheels 4 and left and right rear wheels 5. A transmission case 11 is disposed at the front of the fuselage, and a front wheel final case is disposed on the left and right sides of the transmission case 11. The left and right front wheels 4 are respectively attached to left and right front wheel axles 13 projecting outward from the respective front wheel support portions capable of changing the steering direction of the left and right front wheel final cases 12. Further, the front end portion of the main frame 14 is fixed to the rear portion of the transmission case 11, and a rear wheel gear case 15 is supported by a rear wheel rolling shaft provided horizontally in the front and rear at the rear left and right center of the main frame 14. The rear wheel 5 is attached to a rear wheel axle 16 that is supported so as to be able to roll and projects outward from the rear wheel gear case 15.

  The engine 3 is mounted on a main frame 14, and the rotational power of the engine 3 is transmitted to the transmission case 11 via a transmission device 17 that is a belt transmission device and a hydraulic transmission (HST) 18. The hydraulic transmission 18 is a continuously variable transmission and is operated by a shift lever 20 provided on the side of the handle 19. The shift lever 20 is configured to perform a stepped shift operation of the hydraulic transmission 18, which is a continuously variable transmission, with a step feel by a cam. The rotational power transmitted to the transmission case 11 is shifted by a transmission in the transmission case 11 and then separated into traveling power and external extraction power and extracted. The traveling power is transmitted to the front wheel final case 12 to drive the front wheel 4, and is also transmitted to the respective rear wheel gear cases 15 via the left and right rear wheel transmission shafts 21 extending rearward from the rear surface of the transmission case 11. The rear wheel 5 is driven. Note that left and right side clutches 22 are provided at the rear portion of the transmission case 11 and are transmitted to the respective rear wheel transmission shafts 21 via the side clutches 22. Further, the external take-out power is transmitted to a planting clutch case 23 provided at the rear part of the traveling vehicle body 6, and then transmitted to the seedling planting unit 8 by a seedling planting unit transmission shaft, and also a fertilizer application device 9 by a fertilization transmission mechanism. Is transmitted to.

  The upper part of the engine 3 is covered with an engine cover 24, and a seat 25 is installed thereon. A front cover 26 incorporating various operation mechanisms is provided in front of the seat 25, and a handle 19 for steering the front wheel 4 is provided above the front cover 26. The engine cover 24 and the front cover 26 have horizontal floor steps 27 on the left and right sides of the lower end. The floor step 27 is partly grid-like, and mud on the shoes of the worker walking along the floor step 27 falls on the field. The rear part on the floor step 27 is a rear step 28 that also serves as a rear wheel fender.

  An elevating hydraulic cylinder 29 is provided between the main frame 14 and the elevating link device 7, and when the elevating hydraulic cylinder 29 is expanded and contracted by hydraulic pressure, the elevating link device 7 is rotated up and down, and the seedling planting portion 8. Moves up and down while maintaining an almost constant posture. The hydraulic pressure from the hydraulic pump provided on the traveling vehicle body 6 is supplied to the lifting hydraulic cylinder 29 via a hydraulic valve (electromagnetic hydraulic valve) 30, and the lifting link device 7, that is, the seedling planting portion 8, is switched by switching the hydraulic valve 30. It is configured to move up and down.

  The fertilizer application device 9 feeds the granular fertilizer stored in the fertilizer hopper 31 by a certain amount by the feeding unit 32, and guides the fertilizer to the fertilizer guide 36 attached to the center float 34 and the side float 35 with the fertilizer hose 33, The grooved body 37 provided on the front side of the guide 36 is dropped into a fertilization structure formed near the side portion of the seedling planting strip. Air generated by the blower 39 driven by the blower electric motor 38 is blown into the fertilizer hose 33 via an air chamber that is long in the left-right direction, and the fertilizer in the fertilizer hose 33 is forcibly conveyed by wind pressure. It has become.

  The seedling planting portion 8 is provided with a seedling mounting table 41 inclined so that the front portion is higher on the upper side of the transmission case 40 that is input from the traveling vehicle body 6, and after the planting transmission portion 40 a of the transmission case 40. One set of the seedling planting device 1 is provided at every two ends at the end. The seedling stage 41 is supported by a horizontal frame 42 provided in the left-right direction provided with a seedling outlet 42a. The seedling stage 41 is supported by a left-right reciprocating movement with the mat seedlings. When the seedlings are fed to the outlet 42a and all the seedlings for one horizontal row are fed to the seedling outlet 42a, the seedling feeding belt 43 moves the seedlings downward by a predetermined amount. Accordingly, when the aircraft is advanced with the float made up of the center float 34 and the side float 35 in contact with the ground, the mat seedling is transferred to the seedling outlet 42 a by reciprocating the seedling table 41 or by transferring the seedling feeding belt 43. The seedling planting apparatus 1 separates and supplies them sequentially and is planted in the field. The seedling feeding belt 43 is stretched between a lower driving roller 44 and an upper driven roller 45.

  A side rotor 46 a and a center rotor 46 b that are leveling devices 46 are attached to the seedling planting portion 8. The leveling device 46 is transmitted via the leveling shaft 47 by the power from the left rear gear case 15.

  In addition, the seedling planting unit 8 includes a pair of left and right drawing markers 48 for drawing the aircraft course in the next stroke to the topsoil surface. A center float 34 is provided at the center of the lower portion of the seedling planting portion 8, and side floats 35 are provided on the left and right sides thereof. When the aircraft is advanced with the center float 34 and the side float 35 in contact with the mud surface of the field, the center float 34 and the side float 35 slide while leveling the mud surface, and a seedling planting device is placed on the leveling trace. A seedling is planted by 1. The floats of the center float 34 and the side float 35 are rotatably mounted so that the front end side moves up and down according to the unevenness of the field topsoil surface, and the front float of the center float 34 is moved up and down during planting work. The planting depth of the seedling is always maintained constant by switching the hydraulic valve that controls the elevation hydraulic cylinder 29 according to the detection result and raising and lowering the seedling planting unit 8 according to the detection result.

  In the planting clutch case 23, the seedling planting device 1 is placed in a desired phase (one of the three seedling planting tools 49 is directly above the rotation center 51 of the rotating body 50, and the remaining two are A planting clutch 52, which is a fixed position stop clutch for stopping at a substantially same height on the lower side and a front and rear phase), is provided. The planting clutch 52 includes a drive clutch body 53 having a drive clutch pawl, a driven clutch body 54 having a driven clutch pawl, and a planting clutch spring 55 that pushes the driven clutch body 54 toward the drive clutch body 53. The drive of the seedling planting part 8 is turned on and off. By providing a clutch operation groove 54a on the outer peripheral surface of the driven clutch body 54 and providing a clutch pin 56 to be inserted into the clutch operation groove 54a, and inserting the clutch pin 56 into the clutch operation groove 54a, The driven clutch body 54 gradually moves away from the drive clutch body 53 while being guided by the inclined surface of the clutch operation groove 54 a, and the driven clutch body 54 and the drive clutch body 53 are in a fixed position in the rotation of the driven clutch body 54. It is configured to disengage and disconnect transmission. The clutch pin 56 is operated by driving a PTO clutch operating solenoid 57, and the PTO clutch operating solenoid 57 is operated via a control device 59 by an input signal of a finger lever switch 58a by operation of the finger lever 58.

  Further, a shift lever sensor 20a for detecting the operation position of the shift lever 20 is provided, and the PTO clutch operating solenoid 57 is also planted when the shift lever sensor 20a detects that the shift lever 20 is operated in the reverse operation range. Operate the clutch to disengage. As a result, the planting clutch 52 is also turned off when the seedling planting unit 8 is raised by the backlift interlocking mechanism in accordance with the reverse operation, and then the seedling planting unit 8 is raised when the plant moves forward again. It prevents the drive failure. However, since the hydraulic transmission 18 reverses during reverse travel, a reverse rotation prevention clutch (one-way clutch) is provided in the transmission path to the planting clutch 52 so that transmission to the planting clutch 52 is cut off. Conventionally, even if the clutch pin 56 is inserted into the clutch operation groove 54a by the PTO clutch actuating solenoid 57, the planting clutch 52 and thus the drive clutch body 53 does not rotate and the planting clutch 52 is not turned off. If it does so, when it advances again, it will rotate to the fixed position which the planting clutch 52 stops, and it may feel uncomfortable, and there is a possibility of shaking off the seedling already held by the seedling planting tool 49. Therefore, when the shift lever sensor 20a detects that the stepped lever 20 is in the middle of being operated from the lowest forward speed position (first forward position) to the forward / reverse neutral position, the control device 59, the PTO clutch actuating solenoid 57 is actuated to disengage the planting clutch 52. Thus, the planting clutch 52 can be turned off immediately before the forward traveling stops, and the planting clutch 52 can be reliably stopped at the fixed position when the traveling is stopped.

  The handle 19 is fixed to the upper part of the steering shaft provided in the front cover 26, and the rotation of the steering shaft is decelerated via a steering transmission gear provided in the transmission case 11 and transmitted to the output shaft 59. . And the lower end of the output shaft 59 protrudes from the bottom face of the mission case 11, and the pitman arm 60 is fixed. The front left and right sides of the pitman arm 60 and the left and right front wheel final cases 12 are connected by left and right rods 61.

  Therefore, when the handle 19 is turned, the steering shaft, the steering speed change gear, the output shaft 59, the pitman arm 60, the left and right rods 61, and the left and right front wheels final case 12 are transmitted to the left and right front wheels 4 in the left and right directions. Operated.

  On the other hand, an operating roller 62 is rotatably provided on the rear upper surface of the pitman arm 60. A notch 63 cut out in a U shape in plan view so as to surround the left and right sides of the operating roller 62 is provided. A follower 64 having the transmission case 11 is rotatably supported on the bottom surface of the mission case 11. The left and right sides of the driven body 64 are connected to the front portions of the left and right second rods 66 connected to the left and right clutch operating arms 65. Accordingly, when the handle 19 is turned to the right by a predetermined amount (the amount that the operator turns to the right with the intention of turning the aircraft to the right), the pitman arm 60 is also turned to the right, and the operating roller 62 is turned off by the follower 64. In order to push the left side surface 63a of the notch 63, the follower 64 is rotated, the right second rod 66 is pulled, the right clutch operating arm 65 is operated, the right side clutch 22 is disengaged, As the right rear wheel 5 becomes free-wheeling, the right rear wheel 5 does not damage the cultivator, and does not damage the mud surface by lifting a large amount of mud and turns right. Is smooth and clean.

  Conversely, when the handle 19 is turned to the left by a predetermined amount or more, the pitman arm 60 is also rotated to the left, and the actuating roller 62 pushes the right side surface 63b of the notch 63 of the follower 64, so that the follower 64 is rotated. The left second rod 66 is pulled, the left clutch operating arm 65 is operated, the left side clutch 22 is disengaged, and the left rear wheel 5 on the turning center side is in the idle state. The left turn can be smooth and clean without damaging the cultivator and without causing the mud surface to be roughened by lifting a large amount of mud.

  Further, a left and right sensor push plate 67 is provided on the upper surface of the front portion of the pitman arm 60. When the handle 19 is rotated 200 degrees to the left or right, an autolift switch 68 fixed to the bottom surface of the mission case 11 is provided. Turns ON (the handle 19 rotates up to 360 to 400 degrees to the left and right).

  The pitman arm 60, the left and right rods 61, the operating roller 62, the notch 63, the follower 64, the second rod 66, the left and right sensor push plate 67, and the autolift switch 68 constitute a turning connection mechanism 69. .

  Therefore, the side clutch 22 is disengaged when the aircraft is turning and is grounded to the field as the aircraft turns, so that the number of rotations of the rear wheel 5 that is inside the turning (the rear wheel 5 that is inside the turning) If the travel distance is calculated based on the detection of the number of revolutions of the rear wheel transmission shaft 21), the travel distance is less likely to be affected by the slip than the driven wheel, and the travel distance can be calculated accurately, so that the optimum automatic turning Control is possible. Therefore, the rotation detection gear 70 is fixedly provided on the rear wheel transmission shaft 21 of each of the left and right rear wheels 5, and the number of rotations of the rotation detection gear 70 is detected by the left and right rear wheel rotation sensors 71, The rotational speed of the rear wheel 5 is determined.

  The rear wheel rotation sensor 71 is provided on the upper surface of the mission case 11 so as not to protrude from the mission case 11 to the left and right. This is because the left and right front wheels 4 are arranged on the left and right sides of the mission case 11, and thus the rear wheel rotation sensor 71 is provided on the upper surface of the mission case 11 and protrudes left and right from the mission case 11. Otherwise, the left and right front wheels 4 are not obstructed when the steering operation is performed, the steering angle can be increased, and a small aircraft structure with a small turning radius can be obtained. Can be done. Furthermore, since the rear wheel rotation sensor 71 is provided on the upper surface of the transmission case 11, mud is less likely to adhere to the rear wheel rotation sensor 71 and durability is improved. It can be performed well over a long period of time.

  Further, when the auto lift switch 68 is turned on when the handle 19 is rotated left or right, the raising / lowering hydraulic cylinder 29 is controlled by controlling the electromagnetic solenoid that operates the electromagnetic hydraulic valve 30 by the seedling planting portion raising means of the control device 59. It is comprised so that the seedling planting part 8 may be raised to the maximum position.

  As described above, when the handle 19 is rotated to the left or right as much as possible in order to turn the machine body at the heel, the auto lift switch 68 is turned on and the seedling planting part 8 is automatically raised to the maximum position. Therefore, the operation of raising the seedling planting portion 8 during the turning of the body is not necessary, and the body can be turned efficiently and the workability is good.

  In addition, the control device 59 performs turning interlock control that automatically performs various operations such as planting seedlings during turning based on detection of the number of rotations of the rear wheel 5 inside the turning. In this turning interlocking control, when the steering wheel angle sensor 72 detects that the steering wheel 19 has been operated and the steering wheel 19 has been operated at an operating angle equal to or greater than a predetermined value, which is a state in which the side clutch 22 of the rear wheel 5 inside the turning is cut off. Then, detection of the rotational speed of the rear wheel transmission shaft 21 inside the turning is started by the rear wheel rotation sensor 71 serving as a travel distance detection sensor, and the transmission shaft rotational speed of the inner rear wheel 5 during turning exceeds the set value N1. And the seedling planting part 8 is lowered. Thereafter, the rotational speed of the rear wheel transmission shaft 21 of the rear wheel 5 from when the transmission shaft rotational speed of the rear wheel 5 is set to the set value and the operation of the seedling planting portion 8 enters the “cut” state until the steering wheel 19 is turned off. This is a mechanism for planting “entering” when the total value of n is exceeded.

  First, the first set rotational speed N1 (set value of the inner rear wheel transmission shaft 21 rotation signal from the start of turning to before the turning is completed), the second set rotational speed N2 (turning is completed from the start of turning and further planted ”(The threshold value for determining the rotation signal of the inner rear wheel transmission shaft 21 while traveling for the distance until“ 1 ”), θ1 (threshold value for determining left turn), and θ2 (threshold value for determining right turn) are set.

  Next, in order to cope with differences in field conditions such as field hardness, water depth, and tiller depth, each setting of the first set rotation speed N1, the second set rotation speed N2, and the handle turning angles θ1, θ2 is performed. The correction value n0 is set by the setting dial 73 for θ1, the setting dial 74 for θ2, the setting dial 75 for N1, and the setting dial 76 for N2 for adjusting the values.

  When the seedling planting unit 8 detects whether or not the seedling planting state is in the state of the control device 59 in accordance with the operation of the finger lever 58, when the planting “on” is switched to planting “cut”, The rotation speed n of the rear wheel transmission shaft 21 of the rear wheel 5 is detected by the left and right rear wheel rotation sensors 71 until the steering wheel angle sensor 72 detects that the steering wheel 19 has been turned. Then, the value (n) is stored. The value (n) is a value obtained by averaging the detection values of the left and right rear wheel rotation sensors 71, but may be a detection value of one of the left and right rear wheel rotation sensors 71. Next, the turning angle (steering angle) θ of the handle 19 is detected by a handle turning angle sensor (potentiometer) 72 provided on the shaft of the handle 19 to detect whether or not turning has started.

  When the left turn is in progress, the number of rotations of the rear wheel transmission shaft 21 of the left rear wheel 5 is detected, and when the number of rotations n1 is N1 + n0 or more, the vehicle has traveled a distance that the vehicle turns by a predetermined angle from the start of turning. Therefore, the seedling planting part 8 is lowered. After that, when the rotational speed n2 of the rear wheel transmission shaft 21 of the left rear wheel 5 becomes N2 + n + n0 or more, the seedling planting device 1 of the seedling planting unit 8 reaches the position where the turning is completed and the planting position in the previous stroke is aligned. Since it has reached, the planting clutch “enters” is performed, and the seedling planting apparatus 1 is operated to start planting the seedling. Thereby, planting of a seedling is started at a position aligned with the planting end position in the previous stroke. In the case of a right turn, the same control as in the left turn is performed.

  As described above, since the rotational speed of the rear wheel transmission shaft 21 of the rear wheel 5 in which the side clutch 22 is disengaged is detected, the rotational speed of the rear wheel 5 to which power is transmitted is less affected by slip and the like. There are features. Further, since the rotational speed of the rear wheel transmission shaft 21 that rotates faster than the rear wheel 5 is detected, the measurement accuracy can be easily increased. As a result, there is an effect that the planting start of the seedlings for each planting strip is almost constant (the headland width is constant).

  Further, an output between the planting clutch case 23 and the planting transmission shaft is provided with an inter-strain transmission configured by a hydraulic continuously variable transmission, and the inter-strain transmission is used to drive the seedling planting unit 8 for the traveling of the machine body. It is the structure which changes speed and changes between planting stocks. The inter-company transmission is configured to change the speed of the hydraulic continuously variable transmission by driving an inter-company transmission motor 77. A signal from the inter-strain adjustment dial 78 provided on the front cover 26 is output to the inter-strain shift motor 77 via the control device 59 and set between the planting strains based on the operation of the inter-strain adjustment dial 78. When the auto lift switch 68 detects that the steering wheel 19 is being turned by a predetermined angle or more, the left and right rear wheel rotation sensors 71 detect the rear wheels 5 on the inner side of the turn where the side clutch 22 is disengaged. While detecting the rotation speed of the transmission shaft 21, the rotation speed of the rear-wheel transmission shaft 21 of the rear wheel 5 outside the turning to be driven is detected. At this time, since the traveling paths of the left and right rear wheels 5 associated with the turning of the airframe are not so different, the ratio of the traveling distance of the rear wheels 5 on the inside of the turning to the traveling distance of the rear wheels 5 on the outside of the turning is a predetermined appropriate value ( Although the value is determined by the structure of the machine body such as the tread of the rear wheel 5, which is 1: 5 in this example, the rotational speed of the rear wheel 5 on the outside of the turn to be driven is increased because slip occurs. Therefore, the control device 59 compares the ratio of the detected values of the left and right rear wheel rotation sensors 71 with the appropriate value to determine the traveling slip rate in the field, and outputs it to the inter-variety transmission motor 77 so as to make the planting strain appropriate. To do. The travel slip ratio is the difference between the detected travel distance of the rear wheel 5 outside the turn and the ideal travel distance outside the turn obtained by multiplying the detected travel distance of the rear wheel 5 inside the turn by a constant (5 in this example). It is obtained by dividing by the ideal traveling distance outside the turn. In proportion to the running slip ratio, the stock shifting motor 77 is driven to change the gear ratio of the stock transmission based on the stock adjusting dial 78 to change the gear ratio, and between the desired stocks regardless of the occurrence of traveling slip. I try to plant it. As a result, the amount of seedlings (number of seedlings) used in the field can be stabilized as desired, and a large amount of seedlings are prepared so that a lot of seedlings are wasted so that the seedlings are not shortaged or shortaged. Or troubles that require many seedlings and frequently perform seedling replenishment work can be suppressed, and labor saving and cost reduction can be achieved.

  In addition, what is necessary is just to detect a driving | running | working slip ratio at the time of the first turning in the field, and to set the gear ratio of a stock transmission between the planting operations in the said field based on this driving | running | working slip ratio. Alternatively, if the traveling slip ratio is detected each time the vehicle is turned and the gear ratio of the inter-station transmission is controlled, the difference in the traveling slip ratio for each local area in the field can be dealt with, and the inter-stock can be controlled with high accuracy.

  In the above example, the inter-strain transmission is a hydraulic continuously variable transmission, but the inter-strain transmission is configured by an electric motor that is a power source of the seedling planting unit 8, and the drive speed of the electric motor is controlled to control the inter-strain. It is good also as a structure to control.

  In the above example, the configuration for calculating the transmission ratio of the inter-strain transmission that is the desired inter-strain from the traveling slip rate detected during the turn has been described, but the turn is often performed at the edge of the field, At the time of dredging, the frequency of turning is high, so that the tiller becomes deep and the traveling slip rate tends to increase. Therefore, in order to adapt to straight planting on the inner side of the field in reciprocating traveling, the traveling slip ratio detected during turning is corrected to be small, and the gear ratio of the inter-shaft transmission is calculated from the corrected traveling slip ratio. Good.

  By the way, the seedling planting apparatus 1 is integrally provided with a ring-shaped fixed support body 79 at the rear end of the planting transmission portion 40a, and a rotary body 50 is a bearing (radial ball bearing) 80 described later. And it is fitted through a bush 81 so as to be rotatable. The rotating body 50 includes left and right rotating side bodies 50a, and the left and right rotating side bodies 50a are provided between the left and right rotating side bodies 50a including a final shaft 82 and a support shaft 83 described later. It is configured to be connected by a left and right shaft and rotate integrally. In the rotating body 50, three final shafts 83 are rotatably provided at a phase of 120 degrees on the circumference around the rotation center 51, and project from the rotating body 50 of each final shaft 82. The seedling planting tool 49 is integrally attached to the left and right ends.

  The final shaft 82 is formed in a round shaft shape having a circular cross section, and has a key groove 84 in the middle, and the outer surfaces of the projecting portions from the rotating bodies 50 at the left and right ends are formed in a square shape. The right and left seedling planting tools 49 are attached by fitting the mounting holes 85 of the seedling planting tools 49 each having a rectangular inner surface to the rectangular projections on the outer left and right ends of the final shaft 82. In addition, a seedling planting fixture fixing hole 86 is provided in the mounting hole 85 portion of the seedling planting tool 49 at a position where the projecting portions at the left and right ends of the final shaft 82 are fitted. The seedling planting tool 49 is fixed to the final shaft 82 so as not to move left and right by a fixing pin 87 inserted into the seedling planting tool fixing hole 86.

  Inside the rotator 50, a drive sprocket 88 of equal diameter (circular shape) that rotates integrally with the rotator 50 is provided. The drive sprocket 88 is decelerated and transmitted through an input chain 90 by an input sprocket 89 having the same diameter (circular shape) provided at the rear end of the planting transmission portion 40a, and the rotating body 50 rotates. . Further, the branch drive sprocket 92 that rotates integrally with the transmission shaft 91 in the planting transmission section 40 a is transmitted to the branch driven sprocket 95 that rotates integrally with the input shaft 94 via the chain transmission device 93, and the input shaft 94 The input sprocket 89 is configured to rotate integrally. The branch drive sprocket 92 is provided for every two strips, and a plurality (three in this example) are provided on the transmission shaft 91 according to the number of planting strips. A stop clutch 96 is provided on the transmission shaft 91 to transmit power from the transmission shaft 91 to the branch drive sprocket 92. When the transmission is cut by the stop clutch 96, the branch drive sprocket 92, and thus the input sprocket 89 and the drive sprocket 88 are provided. As a result, the rotating body 50 is configured to stop at a predetermined phase (fixed position: three positions every 120 degrees in the rotation of the rotating body 50). The number of teeth of the drive sprocket 88 is three times the number of teeth of the input sprocket 89.

  Further, a gear train serving as a final shaft rotation transmission mechanism for transmitting to the final shaft 82 is provided inside the rotating body 50. The gear train includes a rotating gear 97 that rotates while moving on a circular path around the rotation center 51 of the rotating body 50, an elliptical first intermediate gear 98 that rotates integrally with the rotating gear 97, and the first intermediate gear An unequal diameter (non-circular) second intermediate gear 99 meshing with the gear 98, an unequal diameter (non-circular) third intermediate gear 100 rotating integrally with the second intermediate gear 99, and the third intermediate gear A fourth intermediate gear 101 having an unequal diameter (approximate triangular shape, rice ball shape) meshing with 100 and rotating about a rotation center 51 of the rotating body 50; and an unequal diameter rotating integrally with the fourth intermediate gear 101 ( (Non-circular) sun gear 102, a plurality (three) of non-equal-diameter (non-circular) planetary gears 103 meshing with the sun gear 102, and a plurality (three or three) of meshing with each of the plurality of planetary gears 103 ) Of the final gear 104. The final gear 104 is engaged with the final shaft 82 through a key 105 fitted in the key groove 84 of the final shaft 82. Accordingly, the final gear 104 and the final shaft 82 are integrally rotated, and the final shaft 82 is rotated by a gear train inside the rotating body 50. The rotating body is rotated by the gear train as the rotating body 50 rotates. The final shaft 82 is rotated with respect to 50. The rotating gear 97 meshes with the internal gear fixed gear 106 fixed to the fixed support 79 and rotates while revolving the circular orbit in conjunction with the rotation of the rotating body 50.

  The planetary gear 103 and the final gear 104 are each composed of a scissor gear in which the phases of the teeth of the two gears are slightly shifted to suppress backlash due to gear backlash, and the operation of the seedling planting tool 49 is accurate and appropriate. Acts as done. Thereby, a special rattling removal mechanism becomes unnecessary, and the seedling planting device 1 can be reduced in size and weight.

  When the rotating body 50 rotates, the three seedling planting tools 49 in one line move in a circular path. At that time, the operation of the rotary gear 97 interlocked with the rotation of the rotating body 50 is transmitted to the final shaft 82 via the gear train, and the posture of the seedling planting tool 49 changes. Thereby, the seedling planting tool 49 operates so that the tip of the seedling collecting claw 107 described later draws an operation locus (static locus: a locus that does not take into account the traveling of the aircraft) P. Since the operation path P includes a stroke C that moves further backward from the bottom dead center, the seedling claw 107 moves from the bottom dead center to a position just above the movement path in consideration of the traveling of the aircraft. ing.

  The seedling planting tool 49 is provided with a bifurcated fork-shaped seedling picking claw 107 having a sharp tip and a seedling extruding body 108 that protrudes and retracts below the seedling picking claw. . The operation mechanism of the seedling extrudate 108 is as follows. A cam arm 111 pivotally supported on the arm shaft 110 is in contact with an outer peripheral surface of an extrusion cam 109 rotatably provided on an outer periphery of an end portion of the final shaft 82. Each push cam 109 is attached to the side surface of the rotator 50 via a claw 112 and is configured to rotate integrally with the rotator 50. Further, an extrusion restricting arm 113 that rotates integrally with the cam arm 111 is pivotally supported on the arm shaft 110, and a tip portion of the extrusion restricting arm 113 and an end portion of the extrusion rod 114 that supports the seedling extrudate 108 are formed. It is connected via a joint member 115. The joint member 115 is biased toward the side from which the push rod 114 protrudes by a push spring 116 that is a bias member. Since the push spring 116 is arranged to be shifted to the left and right with respect to the seedling picking claw 107, the seedling planting tool 49 is compact in the pushing direction of the seedling pushing body 108 and is provided in the rotating direction of the rotating body 50. Are prevented from interfering with each other.

  When the final shaft 82 rotates, the push cam 109 rotates relative to the final shaft 82, and the push restricting arm 113 swings by the action of the cam mechanism composed of the push cam 109 and the cam arm 111. When the push-out restricting arm 113 is in a position where the push-out spring 116 is compressed, the seedling extrudate 108 is in a retracted state. When the push-out restricting arm 113 rotates from that position and the compression of the push-out spring 116 is relaxed, the push-out rod 114 is pushed out by the elastic force of the push-out spring 116, and the seedling pusher 108 protrudes.

  As described above, when working on the riding type rice transplanter 2, the three seedling planting tools 49 move on the same track while maintaining an interval of 1/3 period while drawing the operation track P. At the seedling extraction position, the seedling picking claw 107 separates and extracts the seedlings from the seedling extraction outlet 42a. At this time, the seedling extrudate 108 is in a retracted state. When the seedling planting tool 49 moves downward and moves to the seedling planting position B at the bottom dead center of the operating locus P, the seedling extrudate 108 protrudes, and the soil portion of the seedling held by the seedling catching claw 107 is directed downward. By pushing, the seedling is pushed out from the seedling picking claw 107 and planted in the field. Thereafter, the seedling planting tool 49 further moves rearward, and then moves upward through a rear trajectory than when moving downward. Since the seedling picking claws 107 move almost right after passing through the seedling planting position B in the movement locus in consideration of the traveling of the aircraft, the preceding seedling planting tool 49 does not interfere with the seedling planted. The seedling extrudate 108 moves backward until it moves from the seedling planting position B to the seedling extraction position.

  As described above, the seedling planting apparatus 1 is provided with the seedling planting tools 49 on both the left and right sides of the rotating body 50 that is rotatably supported from the outside by the fixed support 79, so that two rotating bodies can be simultaneously formed by one rotating body. In addition to planting seedlings, each seed is provided with three seedling planting tools 49 so that high-speed planting is possible. In order to realize the above-described configuration, and to improve functionality and reduce costs, the seedling planting apparatus 1 has the following characteristic structure.

  First, the fixed support body 79 is configured as a rear member 40b of the planting transmission portion 40a that is divided into two in the front-rear direction by a dividing surface 117 extending in the vertical direction. The dividing surface 117 is configured in front of the rotating body 50 and has a vertical length equal to or greater than the vertical length of the rotating body 50 (substantially the same vertical length). By removing the rear member 40b of the planting transmission portion 40a, maintenance inside the seedling planting device 1 (gear train or the like) can be easily performed from the opening at the position of the dividing surface 117. In addition, when removing the rear member 40b of the planting transmission part 40a, it carries out, removing the input chain 90. FIG.

  Next, in the gear train transmitted to the three final shafts 82, the sun gear 102 is attached to the sun shaft 118 disposed on the rotation center 51 of the rotating body 50, and the planetary shaft 119 that rotatably supports the planetary gear 103 is provided. A plurality (three) of the planetary gears 103 are provided corresponding to the planetary gear 103, and the power is branched and transmitted from one sun shaft 118 to the plurality (three) final shafts 82. Further, the rotation gear 97, the first intermediate gear 98, the second intermediate gear 99, and the third intermediate gear 100 are disposed between two of the three final shafts 82 in a side view.

  A driving sprocket 88 is provided at the center of the left and right of the rotating body 50, and the driving sprocket 88 includes an opening 88a having an opening at the center, and the sun shaft 118 is inserted through the opening 88a. The rotation gear 97, the first intermediate gear 98, the second intermediate gear 99, and the fixed gear 106 are disposed on the left and right sides (left side) of the drive sprocket 88, and the same left and right positions as the drive sprocket 88 (the opening inside the drive sprocket 88). 88a), the third intermediate gear 100 and the fourth intermediate gear 101 are disposed, and the sun gear 102, the planetary gear 103, and the final gear 104 are disposed on the left and right other side (right side) of the drive sprocket 88. In this way, the right and left balance is improved by arranging the gears of the gear train so as to be distributed to the left and right.

  Since the final gear 104 is a non-circular gear (a non-equal diameter gear), the width of the final gear 104 projecting outward with respect to the final shaft 82 differs depending on the rotational position of the rotating body 50. Therefore, at a portion where the maximum outer diameter portion of the final gear 104 comes to the outside, a part of the final gear 104 protrudes outward from the rotating body 50 in a side view, and the outer shape of the fixed support 79 is corresponding to only that portion. It has a larger shape. Thereby, the rotary body 50 can be reduced in size without making the fixed support body 79 larger than necessary.

  When the final gear 104 having such an unequal diameter is employed, the final shaft 82 can be moved by setting the maximum outer diameter portion of the final gear 104 to the upper side when the final gear 104 is positioned below the movement path. It becomes possible to approach the ground, and the adjustment range of the seedling planting depth can be widened.

  By disposing a speed reduction mechanism by a combination of the input sprocket 89 and the drive sprocket 88 immediately before transmission to the rotating body 50, the stop clutch 96 may be provided on the transmission upper side than the input sprocket 89. It may be provided on the transmission shaft 91 as in this example, or may be provided on the input shaft 94, and the degree of freedom of arrangement of the stop clutch 96 is increased. Further, when the rotating body 50 is stopped by the stop clutch 96, any one seedling planting tool 49 is positioned immediately above the rotation center 51 of the rotating body 50. In this way, the weight balance of the rotating body 50 including the odd number (three) seedling planting tools 49 becomes uniform in the front-rear direction, so that the operation is reliably stopped and the stop position is stabilized. Also, since the lower pair of front and rear seedling planting tools 49 have substantially the same height at the lower end, the distance from the ground to the lower seedling planting tool 49 is properly maintained when operation is stopped, The tool 49 can be prevented from interfering with the ground. Furthermore, since the seedling planting tool 49 is in front of the rear end of the fixed support 79 when the rotating body 50 is stopped, the seedling planting tool 49 can be prevented from hitting an obstacle behind the seedling planting tool 49. It is effective in protecting

  Inside the drive sprocket 88 (opening 88a), a plurality (three) of final shaft through-holes 88b through which a plurality (three) of the final shafts 82 respectively penetrate, and a plurality (five) of support shafts in the left-right direction. A plurality (five) of support shaft through-holes 88c through which 83 penetrates are provided. The final shaft through-hole 88b and the support shaft through-hole 88c are provided at the same distance from the rotation center 51 of the rotating body 50, and the final shaft through-hole 88b is arranged for every 120 degrees in the rotation direction of the rotating body 50. Support shaft through holes 88c are arranged between the final shaft through holes 88b in the 50 rotation directions. Therefore, the final shaft 82 and the support shaft 83 are arranged at positions that are eccentric with respect to the rotation center 51 of the rotating body 50 and are different from each other. Of the three final shafts 82 along the rotation direction of the rotating body 50, two support shafts 83 are arranged between the two final shafts 82, and 1 between the remaining one final shafts 82. A book support shaft 83 is disposed. The rotation gear 97, the first intermediate gear 98, the second intermediate gear 99, and the third intermediate gear 100 are arranged in the phase between the remaining one final shaft 82 in the rotation of the rotating body 50, and the support shaft Therefore, the number of support shafts 83 between the remaining final shafts 82 is set to be smaller than the number of support shafts 83 between the other two final shafts 82.

  The support shaft 83 is provided with a bearing (radial ball bearing) 80 at a position on the right side. The bearing 80 is in contact with the circular inner peripheral surface of the fixed support 79, and the rotating body 50 is rotatably supported by a plurality of (total five) bearings 80. A circular bush 81 is provided on the circular inner peripheral surface of the fixed support 79, and the inner peripheral surface of the bush 81 is a circular outer peripheral surface of the contact portion 50 b of the left rotation side body 50 a of the rotating body 50. Touching. Therefore, the rotating body 50 is also rotatably supported by the bush 81. A support shaft 83 passes through the inside of the contact portion 50b, and the contact portion 50b is located on the left side of the support shaft 83.

  The support shaft 83 has a left end attached and fixed to the left rotating side body 50a by a left mounting bolt 120, and a right end attached and fixed to the right rotating side body 50a by a right mounting bolt 121. The left mounting bolt 120 and the right mounting bolt 121 are configured to be inserted into a female screw portion 122 formed in the support shaft 83, and the left and right ends of the support shaft 83 are connected to the left and right rotating side bodies 50a. It becomes the mounting pin of the left-right direction to attach and fix. The length of the left mounting bolt 120 on the bush 81 side is set longer than the length of the right mounting bolt 121 on the bearing 80 side, and the tip of the left mounting bolt 120 is at the inner periphery of the bush 81. It extends to the side position (the same left and right position as the bush 81). In other words, the left female screw portion 122 into which the left mounting bolt 120 is inserted extends to a position on the inner peripheral side of the bush 81 (the same left and right position as the bush 81).

  Further, the bush 81 is disposed at the left side position, whereas the final gear 104 is disposed at the right side position, and the left and right positions of the bush 81 and the final gear 104 are shifted. Depending on the rotational position of the rotating body 50, the final gear 104, which is a non-circular gear (unequal diameter gear), projects outward from the rotating body 50. In this state, the positional relationship in which the final gear 104 and the bush 81 overlap in a side view. It becomes. Further, the bearing 80 arranged at the right side position is located at the same left and right position as the final gear 104. Specifically, the final gear 104 is configured to fit within the lateral width of the bearing 80. Thereby, since the structure between the left and right rotating side parts 50a is arranged in a compact manner, the left and right widths of the rotating body 50 and the seedling planting device 1 can be configured to be narrow.

  Similarly to the support shaft 83, the rotation center shaft 123 of the rotation gear 97 and the first intermediate gear 98 is fixedly attached to the left and right rotation side bodies 50a by left and right rotation center shaft mounting bolts 124. In order to maintain the final shaft rotation transmission mechanism between the left and right rotation side bodies 50a, for example, the right seedling planting tool 49, the right mounting bolt 121 of the support shaft 83, and the right rotation center shaft mounting bolt 124 are installed. By removing the right side member 50a on the right side, it is possible to open the right side while leaving the final shaft rotation transmission mechanism, and the maintenance of the final shaft rotation transmission mechanism can be easily performed from the open part. As in the past, if the gears of the gear train of the final shaft rotation transmission mechanism are disengaged with the removal of the rotating side body, phase alignment of the gears may be difficult and troublesome when reassembled. Since it can be opened with the gear train of the mechanism left as it is, the maintainability is greatly improved. In the above description, the case where the right rotating side body 50a is removed and the inside of the seedling planting apparatus 1 is opened has been described. However, the left seedling planting tool 49, the left side mounting bolt 120 of the support shaft 83, and the left side. The inside of the seedling planting apparatus 1 may be opened by removing the rotation center shaft mounting bolt 124 and removing the left rotation side body 50a. That is, it is possible to open the inside of the seedling planting device 1 by removing either the left or right rotation side body 50a and leaving the other rotation side body 50a. Therefore, when maintaining the sun gear 102, the planetary gear 103, the final gear 104, and the periphery thereof arranged on the right side of the drive sprocket 88 according to the position of the member to be maintained, the right rotating side body 50a is used. When the rotary gear 97, the first intermediate gear 98, the second intermediate gear 99, and the periphery thereof are removed and maintained on the left side of the drive sprocket 88, the other side gears can be removed by removing the left rotation side body 50a. Maintenance can be easily performed without releasing the meshing.

  The fixed gear 106 and the drive sprocket 88 are circular, have substantially the same diameter as the circular left and right rotating side bodies 50a, and are slightly smaller than the left and right rotating side bodies 50a. An area overlapping 50a, that is, an open area when the left and right rotating side bodies 50a are removed. Therefore, the fixed gear 106 and the drive sprocket 88 can be taken in and out from the open area, and the maintainability is improved. Conventionally, it is necessary to divide or remove the fixed support and attach / detach the fixed gear, which makes maintenance troublesome. In this example, the fixed gear 106 is attached from the right side to the portion to which the bush 81 of the fixed support 79 is attached, so that the fixed gear 106 can be easily attached and detached from the right side by removing the right rotating side body 50a. Since the oil seal 125 is provided between the left and right rotating side bodies 50a and the fixed support 79, the oil seal 125 needs to be removed when the fixed gear 106 and the drive sprocket 88 are attached or detached.

  On the left and right outer sides of the seedling planting device 1 for all the strips (six strips), a balance weight 126 that is rotated by transmission from the planting transmission unit 40a is provided. The balance weight 126 is configured to rotate about the same rotation center as the rotation center 51 of the rotator 50 of the seedling planting device 1 in a side view and to rotate in the opposite direction to the rotator 50, and has a phase of 120 degrees in the rotation direction. A total of three weight portions 126a are provided. The rotation of the balance weight 126 cancels the vibration caused by the operation of the seedling planting device 1 in which the seedling planting tools 49 are provided in an odd number (three) in each strip, thereby reducing the vibration of the seedling planting unit 8 and the machine body. Yes.

  An air hole 127 is provided in the upper part of the fixed support 79, and the air hole 127 increases the internal pressure of the internal space surrounded by the fixed support 79 of the seedling planting device 1 and the left and right rotating side bodies 50a. Maintained at atmospheric pressure. Accordingly, it is possible to prevent the internal lubricating oil from leaking into the field due to the internal pressure of the seedling planting device 1 being increased by the operation of the rotating body 50 or the final shaft rotation transmission mechanism, and adversely affecting the cultivation.

  As described above, the seedling planting apparatus 1 in the riding type rice transplanter 2 allows the rotary body 50 rotating around the rotation center 51 in the left-right direction to freely rotate the final shaft 82 in the left-right direction eccentric to the rotation center 51. The seedling planting tool 49 is integrally attached to the projecting portion of the final shaft 82 projecting left and right from the rotating body 50, and the final shaft 82 is rotated with respect to the rotating body 50 as the rotating body 50 rotates. A shaft rotation transmission mechanism is provided.

  Therefore, in the seedling planting apparatus 1, the seedling planting tool 49 moves in a circular path when the rotating body 50 rotates around the rotation center 51. At that time, the final shaft 82 to which the seedling planting tool 49 is attached rotates with respect to the rotating body 50 via the final shaft rotation transmission mechanism, so that the posture of the seedling planting tool 49 is appropriately changed and the circular trajectory. Hold the appropriate posture according to the upper moving position. Further, since the seedling planting tool 49 is provided on both the left and right projecting portions of the final shaft 82 projecting from the rotator 50 to the left and right sides, and the seedling planting tool 49 is provided on both the left and right sides of the rotator 50, one rotator is provided. 50 can also be used in two lines, and the seedling planting device 1 can be reduced in weight and cost, and the seedling planting tools 49 can be arranged on the left and right sides of the final shaft rotation transmission mechanism. The transmission to the final shaft 82 and the seedling planting tool 49 is stabilized, and the planting accuracy is improved.

  The tip of the seedling planting tool 49 is operated by drawing a loop-like operation locus P in a side view, and the upward movement locus from the bottom dead center to the top dead center of the operation locus P is the bottom dead center. From the upper and lower middle part to the upper and lower middle part D, bent at the upper and lower middle part D, and from the upper and lower middle part D to the top dead center, the upper and lower middle part that operates diagonally forward and upward D It has become. This operation locus P is realized by unequal speed transmission of the final shaft rotation transmission mechanism. As a result, the movement trajectory of the seedling planting tool 49 considering the traveling of the aircraft can be prevented from moving to the front side when moving up from the bottom dead center, and the planted seedling planting tool 49 can be tilted forward. This improves the planting accuracy. Specifically, from the bottom dead center to 30 degrees of the rotating body 50, the movement locus of the seedling planting tool 49 moves up almost directly from the bottom dead center.

  In addition, the seedling planting apparatus 1 includes a rotating body 21 that rotates on the inner peripheral side of the fixed support 79, and the final shaft 82 in the left-right direction can be freely rotated at a position that is eccentric with respect to the rotation center 51 of the rotating body 50. And providing a final shaft rotation transmission mechanism for attaching the seedling planting tool 49 to the projecting portion of the final shaft 82 projecting from the rotating body 50 and rotating the final shaft 82 relative to the rotating body 50 as the rotating body 50 rotates. A plurality of left and right support shafts 83 are provided at positions eccentric to the rotation center 51 of the rotating body 50 and different from the final shaft 82, and a bearing 80 provided on the support shaft 83 is included in the fixed support body 20. The rotating body 21 is rotatably supported in contact with the peripheral portion.

  Accordingly, a plurality of bearings 80 can be provided to support the rotating body 50 appropriately, so that the rotating body 50 can be appropriately rotated. In addition, since a plurality of support shafts 83 are provided at positions different from the final shaft 82 and the bearings 80 are provided on the support shaft 83, each of the final shaft 82 and the support shaft 83 can be downsized, and the seedling planting apparatus 1 Therefore, the seedling planting apparatus can be operated smoothly.

Further, a bush 81 is provided on the inner peripheral side of the fixed support body 20, and the support shaft 83 is passed through the contact portion 50 b of the rotating body 50 that contacts the bush 81.
Therefore, by providing the bush 81 and passing the support shaft 83 through the contact portion 50b of the rotating body 50 that contacts the bush 81, the rotating body 50 can be supported stably and appropriately, and the fixed support 79 and the rotating body 50 are supported. The concentricity of the rotating body 50 is improved, the sealing performance is improved, and the occurrence of vibration due to the rotation of the rotating body 50 can be suppressed.

  The rotating body 50 includes left and right rotating side bodies 50a. A final shaft rotation transmission mechanism is disposed between the left and right rotating side bodies 50a and on the inner peripheral side of the fixed support 79. The left and right ends are fixed to the left and right rotating side bodies 50a by left and right mounting pins 120 and 121, respectively, and the length of the mounting pin 121 disposed on the bearing 80 side of the left and right mounting pins 120 and 121 is fixed. In addition, the length of the mounting pin 120 disposed on the bush 81 side is made longer, and the mounting pin 120 disposed on the bush 81 side extends to a position on the inner peripheral side of the bush 81.

  Therefore, the mounting pin 120 arranged on the bush 81 side improves the support rigidity of the support shaft 83 near the contact portion 50b, and the contact portion 50b and the bush 81 are less likely to be tilted. It can be supported properly.

Further, in the final shaft rotation transmission mechanism, the final gear 104 that rotates integrally with the final shaft 82 is arranged so as to be displaced from the bush 81 in the left-right direction.
Therefore, the bush 81 can be arranged at a position overlapping with the final gear 104 in a side view, the rotating body 50 and thus the seedling planting device 1 can be reduced in size, and the rotational resistance of the rotating body 50 is reduced so that the seedling planting device 1 is It can be operated smoothly.

In the final shaft rotation transmission mechanism, the final gear 104 that rotates integrally with the final shaft 82 is disposed at the same left and right position as the bearing 80.
Therefore, the part rotated by the rotator 50 can be made compact, the lateral width of the part can be reduced, and the seedling planting device 1 can be downsized.

  Further, the rotating body 50 is provided with left and right rotating side bodies 50a so that one of the left and right rotating side bodies 50a can be removed, and between the left and right rotating side bodies 50a and on the inner peripheral side of the fixed support body 79. The final shaft rotation transmission mechanism is provided with an internal gear fixed gear 106 that does not move, and a rotation gear 97 that revolves by rotation of the rotating body 50 while rotating by meshing with the fixed gear 106. In addition, the rotation gear 97 is configured to transmit to the final gear 104 that rotates integrally with the final shaft 82, and the fixed gear 106 is configured to be accommodated in an area overlapping with the left and right rotation side bodies 50 a in a side view.

Accordingly, the fixed gear 106 can be attached and detached from the space formed by removing the left and right rotating side bodies 50a, and maintenance such as replacement of the fixed gear 106 is facilitated.
Further, the rotating body 50 includes left and right rotating side bodies 50a, and a final shaft rotation transmission mechanism is disposed between the left and right rotating side bodies 50a and on the inner peripheral side of the fixed support 79, thereby transmitting the final shaft rotation. It is set as the structure which can remove one rotation side part 50a on either side, leaving a mechanism.

Therefore, it is possible to perform maintenance of the final shaft rotation transmission mechanism by removing one of the left and right rotating side bodies 50a, and maintainability is improved.
Further, the tip of the seedling planting tool 49 is configured to draw a loop-like operation locus P in a side view, and the upward movement locus from the bottom dead center B to the top dead center of the operation locus P is from the bottom dead center B. It is a trajectory that changes the direction of operation greatly in the upper and lower intermediate part D that operates up to the middle part between the upper and lower sides, and that operates diagonally forward and upward from the upper and lower middle part D to the top dead center.

  Therefore, it is possible to prevent the seedling planting tool 49 from moving forward from the bottom dead center when the movement trajectory of the seedling planting tool 49 taking into account the traveling of the aircraft, so that the seedling planting tool 49 tilts the planted seedling forward. Can improve planting accuracy.

  In the embodiment of the present invention, the gear train provided in the rotary body 50 as the final shaft rotation transmission mechanism has been described. However, the seedling fixed to the fixed support 79 side in the rotary body 50 as the final shaft rotation transmission mechanism. A planting posture changing cam is provided, and the final shaft 82 is appropriately rotated in accordance with the position of the seedling planting tool 49 (final shaft 82) that moves with the rotation of the rotating body 50 by the cam. The posture of the tool 49 may be changed. Thereby, compared with the above-mentioned gear train, the number of parts is reduced, and the cost can be reduced. At this time, if the seedling planting tool posture changing cams in the left and right two seedling planting tools 49 are made common, the number of parts can be further reduced. Further, in order to prevent the final shaft from interfering with the seedling planting posture changing cam by the rotation of the rotating body 50, the final shaft 82 is divided into right and left corresponding to the left and right seedling planting tools 49, What is necessary is just to arrange | position the seedling planting tool attitude | position change cam between the last shafts 82. FIG. Further, as described above, in order to make the final shaft 82 common to the right and left seedling planting tools 49 so that the final shaft 82 does not interfere with the seedling planting posture changing cam, a plurality of the shafts can be seen from the side of the body. It is only necessary to arrange the seedling placement tool posture changing cam only on the inside or outside of the (three) final shafts 82. If the cam for changing the posture of the seedling planting device is arranged in the opening (space portion) 88a inside the drive sprocket 88, the space inside the rotating body 50 can be used effectively, and the seedling planting device 1 can be further updated. The size can be reduced.

  By the way, in the seedling planting apparatus 1 provided with the rotating body 50 provided with the two seedling planting tools 49 in each conventional strip, the shaft 128 that drives the rotating body 50 and the rotating body 50 are integrally rotated by a key. However, it is conceivable that key play occurs and the rotating body 50 does not rotate smoothly. Therefore, a wire-like spring 129 is provided on the shaft 128, and the rotating body 50 is urged in the rotational direction by the spring 129. The rotating body is a dead center where the two seedling planting tools 49 are positioned vertically. The rotational speed of 50 becomes difficult to decrease, and the rotating body 50 can be smoothly rotated. As a result, the rotating body 50 can be rotated at a high speed to enable high-speed planting. Note that the seedling planting apparatus 1 provided with the three seedling planting tools 49 in each of the above-described strips may be configured to urge the rotating body 50 with a spring.

  The present invention is not limited to a seedling planting apparatus, and can also be applied to a seedling extraction apparatus used in a seedling extraction process for extracting seedlings from a seedling mount.

DESCRIPTION OF SYMBOLS 14 ... Seedling planting device, 21 ... Rotating body, 24 ... Center of rotation, 25 ... Final shaft, 26 ... Seedling planting tool, 35 ... Rotating gear, 36 ... Intermediate gear, 39 ... Final gear, 40 ... Fixed gear, 83 ... Bolt for angle change

Claims (8)

  A rotating body (50) that rotates on the inner peripheral side of the fixed support (79) is provided, and the final shaft (82) in the left-right direction can freely rotate at a position that is eccentric with respect to the rotation center (51) of the rotating body (50). The seedling planting tool (49) is attached to the projecting portion of the final shaft (82) projecting from the rotating body (50), and finally the rotating body (50) is rotated with respect to the rotating body (50). In the seedling planting device provided with a final shaft rotation transmission mechanism for rotating the shaft (82), the left and right positions are eccentric with respect to the rotation center (51) of the rotating body (50) and are different from the final shaft (82). A plurality of directional support shafts (83) are provided, and a bearing (80) provided on the support shaft (83) contacts the inner periphery of the fixed support (79) to rotatably support the rotating body (50). Seedling planting equipment.   The bush (81) is provided on the inner peripheral side of the fixed support (79), and the support shaft (83) is passed through the contact portion (50b) of the rotating body (50) contacting the bush (81). The seedling planting apparatus as described.   The rotating body (50) includes left and right rotating side bodies (50a), and a final shaft rotation transmission mechanism is disposed between the left and right rotating side bodies (50a) and on the inner peripheral side of the fixed support body (79). The left and right ends of the support shaft (83) are fixed to the left and right rotating side bodies (50a) by attaching the left and right mounting pins (120, 121) to the left and right rotating side bodies (50a). Among them, the length of the mounting pin (120) arranged on the bush (81) side is made longer than the length of the mounting pin (121) arranged on the bearing (80) side, and on the bush (81) side. The seedling planting device according to claim 2, wherein the mounting pin (120) to be arranged extends to a position on the inner peripheral side of the bush (81).   The seedling according to claim 2 or 3, wherein, in the final shaft rotation transmission mechanism, the final gear (104) that rotates integrally with the final shaft (82) is arranged so as to be shifted in the left-right direction from the bush (81). Planting device.   5. The final shaft rotation transmission mechanism according to claim 2, wherein the final gear (104) that rotates integrally with the final shaft (82) is disposed at the same left-right position as the bearing (80). Seedling planting equipment.   The rotating body (50) is provided with left and right rotating side bodies (50a) so that one of the left and right rotating side bodies (50a) can be removed, and is fixedly supported between the left and right rotating side bodies (50a). A final shaft rotation transmission mechanism is arranged on the inner peripheral side of the body (79), and the final shaft rotation transmission mechanism rotates while engaging with a fixed gear (106) of an internal tooth that does not move and the fixed gear (106). A rotating gear (97) that revolves by the rotation of the rotating body (50) is provided, and is configured to transmit from the rotating gear (97) to the final gear (104) that rotates integrally with the final shaft (82). The seedling planting device according to any one of claims 2 to 5, wherein the fixed gear (106) is configured to fit in a region overlapping with one of the rotating side bodies (50a).   The rotating body (50) includes left and right rotating side bodies (50a), and a final shaft rotation transmission mechanism is disposed between the left and right rotating side bodies (50a) and on the inner peripheral side of the fixed support body (79). The seedling planting apparatus according to any one of claims 1 to 6, wherein the right and left rotation side bodies (50a) can be removed leaving the final shaft rotation transmission mechanism.   The tip of the seedling planting tool (49) is configured to draw a loop-like operation locus (P) in a side view, and the upward movement locus from the bottom dead center (B) to the top dead center of the operation locus (P) is From the bottom dead center (B) to the upper and lower middle part (D), it operates diagonally rearward and upward, and from the upper and lower middle part (D) to the top dead center it operates largely from the upper and lower middle part (D). The seedling planting apparatus according to any one of claims 1 to 7, wherein the seedling planting device has a trajectory that changes direction.

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