JP5381464B2 - Seedling planting machine - Google Patents

Description

The present invention, by rotation of the lead cam shaft, moves guided lead cam, the seedlings tank connected to the lead cam, about the NaeUe machine moving the seedlings tank to the left-right direction transverse to the operating position of NaeUetsume.

  By rotating the lead cam shaft, the lead cam fitted to the lead cam shaft is reciprocated in the axial direction, and the seed tank is reciprocated over one mat seedling width region. A technique for covering the expansion / contraction boot (for example, Patent Document 1) is known.

JP 58-88257 (first page, FIG. 1).

  In the seedling planting machine, there are many seedling planting operations by paddy field travel, and the seed cam and the lead cam shaft for reciprocating the seedling tank in the left and right direction move to a position close to the seedling planting soil surface. The expansion and contraction of the expansion / contraction boot that covers the outer periphery of the shaft makes it easy to inhale and exhaust muddy water due to the intake and exhaust action into the boot chamber. In many cases, the lubricating oil is discharged and contaminated.

According to one aspect of the present invention, provided vertically movably to the vehicle body NaeUe device to the rear side of (15) (10), the lead cam (2) seedlings tank (1) constituting該苗planting device (10) the outer periphery of the integrally formed, the lead cam (2) the lead cam shaft in the width direction Ru is reciprocated seedlings tank (1) to (3) is provided, the lead cam shaft on the left and right side portions of the lead cam (2) (3) part of each covering a pair of right and left scaled boots (4,5) provided, said pair of scaled boots (4,5) of the boot chamber (6,7) communicating pipe that communicates freely vented between the (8) A lubrication oil supply device (9) for supplying lubricating oil to the seedling planting transmission device (11) for transmitting the lead cam shaft (3) and the seedling planting device (10), the lubrication oil supply device (9) A part of the lubricating oil for lubricating the seedling transmission device (11) is supplied to the left and right boot chambers (6, 7). , Was NaeUe machine, characterized in that a configuration for supplying the sliding portion of the lead cam shaft (3) and a lead cam (2).

The invention described in claim 2 is a seedling planting rotor (17) for taking seedlings from the seedling tank (1) and planting them at the rear end of the seedling planting transmission case (30) constituting the seedling planting transmission device (11). The seedling rotor (17) is provided with a rotor shaft (55) for transmitting a driving force, the rotor shaft (55) is provided with a sprocket (56), and the sprocket (56) is rotated at an irregular speed. A gear is provided, a projection (58) is provided on the sprocket (56), a magnet (59) is provided on the seedling transmission case (30), and the magnet (59) is unequal of the sprocket (56) by an eccentric gear. The seedling planting machine according to claim 1 , wherein the sprocket (56) is arranged at a position where the protrusion (58) approaches immediately after the fast rotation reaches a peak, and the sprocket (56) is caused to rotate by a magnetic force. I did .

According to a third aspect of the present invention, the vehicle body (15) is provided with a hydraulic continuously variable transmission (41), and a main transmission lever (60) for performing a shifting operation of the hydraulic continuously variable device (41) is provided. A forward neutral arm (63) and a reverse neutral arm (64) that are rotated around the trunnion shaft (62) in conjunction with the operation of the speed change lever (60) are provided, and a pedal shaft ( 70), a brake pedal (61) rotating around the pedal shaft (70) is provided, a forward neutral return cam (71) and a reverse neutral cam (72) are provided on the brake pedal (61), and the brake When the pedal (61) is operated, the forward neutral return cam (71) comes into contact with the forward neutral arm (63), or the reverse neutral return cam (72) comes into contact with the reverse neutral arm (64) and the main transmission lever (60) is moved. Move to neutral position (N) When the brake pedal (61) is operated in a half-depressed state, the main transmission lever (60) moves to a neutral position (N) or a position close to the neutral position (N), and the main transmission lever (60) and a forward position (F) or reverse position seedling planting machine according to claim 1, characterized in that it has a structure for restricting the movement of the speed-increasing side (B).

According to the first aspect of the present invention, when the expansion / contraction boot chambers (4, 5) on both the left and right sides of the lead cam shaft (3) expand and contract, the air between the left and right boot chambers (6, 7) is communicated with the communication pipe (8 by moving through), the scaling operation of the expansion boots (4,5) is maintained, which prevents pumping like intake and exhaust and muddy water from the outside, without lubricating oil from leaking to the paddy field surface, Water and soil contamination is prevented .
Lubricating oil can be supplied by using a communication pipe (8) for guiding the flow of pressurized air between the left and right expansion / contraction boots (4, 5) and the left and right boot chambers (6, 7). Since the lubricating oil can be supplied from the lubricating oil supply device (9), the weight can be reduced and the cost can be reduced.
And since lubricating oil can be supplied using the pressure change of a left and right boot chamber (6, 7), a lubricating oil supply apparatus (9) can be comprised simply.
Furthermore, since a part of the lubricating oil supplied to the seedling planting transmission device (11) can be used as the lubricating oil for the lead cam shaft (3) and the lead cam (2), the configuration of the lubricating oil supply device (9) is further simplified. Therefore, weight reduction and cost reduction can be achieved.

In addition to the effect of the invention described in claim 1 , the invention described in claim 2 provides rotational resistance by magnetic force when the projection (58) provided on the sprocket (56) rotating at an inconstant speed by the eccentric gear approaches. By providing the magnet (59) to be generated, the non-uniform rotation that occurs when the sprocket (56) is rotated can be mitigated, and the brushing phenomenon when transmitted to the seedling rotor (17) can be reduced.
Moreover, since the metal powder produced in the seedling planting transmission case (30) can be adsorbed by the magnetic force of the magnet (59), the durability can be improved.

In addition to the effect of the invention described in claim 1, when the brake pedal (61) is operated, the forward neutral return cam (71) or the reverse neutral return cam (72) becomes the forward neutral arm. When the brake pedal (61) is stepped on, the vehicle body (15) can be stopped when the main transmission lever (60) returns to the neutral position (N) by contacting the reverse neutral arm (64) or (63).
Further, when the brake pedal (61) is operated in a half-depressed state, the main transmission lever (60) moves to the neutral position (N) or close to the neutral position (N), and the forward position (F) or reverse position. By restricting the operation to the speed increasing side of (G), it is possible to prevent sudden start and acceleration during storage of the aircraft, loading work, or traveling over the ridge, so work safety is improved. improves.

The top view of a lead cam shaft part. The side view of a seedling transplanter. The plan view. The front view of a leaf cam shaft part. The cross-sectional view and side view of the expansion / contraction boot part. The perspective view of the rotor axial part of a seedling planting transmission case. The side view of a main transmission lever and a brake pedal part. The side view which shows the operating state of a working tool attachment socket part, and the front view of an attachment pin. The front view and the top view of the attachment socket part. The front view of a steering case part. The control block diagram of a wheel damper. The side view which shows the wheel damper example of the rear-wheel side. The enlarged side view which shows a part of example of a wheel damper on the rear wheel side.

  On the basis of the drawings, the raising / lowering seedling planting device 10 is connected to the rear side of the vehicle body 15 in the four-wheel-riding traveling form having the front wheel 23 and the rear wheel 24 via the raising / lowering link 25 in the form of a parallel link, Configure the seedling transplanter. The vehicle body 15 has a driver's seat 21, the engine 22 is mounted on the lower portion thereof, and the steering wheel 20 is provided on the steering post on the front portion of the floor 36, so that the front wheel 23 can be steered. From the engine 22, a hydraulic continuously variable transmission 41 on the lower side of the floor 36 is belt-transmitted to transmit the input shaft of the transmission case 42. The transmission device of the transmission case 42 transmits the front wheel 23 and transmits the rear wheel shaft 45 of the rear axle housing 44 via the rear wheel transmission shaft 43. Further, a PTO shaft extending backward from the mission case 42 is provided, and a fertilizer 38 mounted on the rear portion of the vehicle body 15 is transmitted from the PTO shaft, and the input shaft 26 of the seedling planting device 10 is transmitted. An auxiliary seedling mounting frame 37 is provided outside the floor 36, and a seedling tray that stores seedlings to be supplied to the seedling tank 1 of the seedling planting device 10 can be mounted. Further, the fertilizer applying device 38 is formed by the groove forming device 40 by guiding the fertilizer fed from the fertilizer hopper on the rear side of the driver's seat 21 to the groove forming portion 40 of the float 16 through the fertilizing hose 39. Fertilize in the fertilizer groove on the seedling soil surface.

The seedling planting device 10 includes a multi-row planting seedling tank 1, a seedling planting nail 29 that separates and holds seedlings fed from the seedling tank 1, and is planted on a soil surface leveled by the float 16. Is done. NaeUe transmission 11, mainly of NaeUe transmission case 30, the lead cam shaft 3 over lateral laterally before the top of the NaeUe transmission case 30 and rotatably supported, from a portion of the interior of NaeUe transmission 11 Rotating transmission. The lead cam 2 is fitted in the center portion of the lead cam shaft 3 and a slider is fitted in a spiral guide groove formed in a reciprocating form. It is configured to reciprocate. At the rear end of the seedling planting transmission case 30, a seedling planting rotor 17 having a rotary shape having a seedling planting nail 29 is axially mounted and transmitted through the seedling planting transmission device 11, and The soil is leveled with a float 16 at the lower end by operating the planting trajectory line D in an elliptical shape when viewed from the side, allowing the seedling 31 at the lower end of the seedling tank 1 to pass through the seedling inlet 31 to separate and hold the seedling. Plant seedlings to a certain depth.

The seedling tank 1 is provided with a number of mat seedlings according to the number of planting strips, and is fed out to the seedling outlet 31 at the lower end of the rear end. A partition 46 is provided for each width, and a feeding belt 28 is provided between the partitions 46. The lead cam 2 by the rotation of the lead cam shaft 3 and the seedling tank 1 which is laterally moved integrally by the lead cam 2 reciprocate to the left or right by a distance corresponding to one mat seedling width between the left and right partitions 46. To do. Thus while the front edge of the mat seedlings between the partition 46 is moved transversely with respect to seedling Tokuchi 31, while separating the matte seedlings by the action of NaeUetsume 29 planted. Further, when the seedling tank 1 moves to the left end or the right end and reaches the turn-back stroke, the belt 47 that spans the feeding belt 28 at the bottom of the seedling tank 1 by the crank arms 48 at both ends of the lead cam shaft 3. The one-way clutch and the seedling feeding arm 50 are engaged and rotated, and each feeding belt 28 is intermittently rotated by one frame to feed the mat seedling toward the seedling outlet 31 side.

  Between the rear wheel 24 and the float 16 of the seedling planting device 10, a scraping rotor 54 for scraping and leveling the soil surface is arranged to improve the leveling by each float 16. This scraper rotor 54 is provided along the front side of the seedling tank 1 support frame 34 that is configured on the front side of the seedling planting transmission case 30, so that the scraping frame 35 can be moved up and down via the upper and lower link arms 37. The scraping frame 35 can be moved up and down by operating the lever 51. The machining position of the machining rotor 54 can be changed according to the depth of the soil surface. Each of the scraper rotors 54 is arranged differently in the front-rear direction depending on the position of the float 16, but the scraper rotor 54 is connected to a part of the rear axle housing 44 that mounts the rear wheel shaft 45 via the interlocking shaft 32. The rotor shaft 33 is transmitted. Reference numeral 49 denotes a balance spring that suspends the front scraper rotor 54.

  Here, the seedling tank moving device of this seedling transplanter is fitted with a lead cam 2 provided integrally with the seedling tank 1, and the lead cam shaft 3 is provided on the outer periphery of the lead cam shaft 3 that reciprocates along the tank width direction. 3 is provided with a pair of left and right expansion / contraction boots 4 and 5 covering the lead cam 2 fitted and guided to both ends of the lead cam shaft 3, and a boot chamber 6 in the pair of right and left expansion / contraction boots 4 and 5, 7 The seedling tank moving device is configured to communicate with each other in a freely ventilating manner. When the lead cam shaft 3 is rotated during seedling planting, the lead cam 2 fitted to the lead cam shaft 3 is reciprocated along the axial direction, and the seed tank 1 connected to the lead cam 2 is moved in the tank width direction. The seedling separation part at the front edge of the seedling tank 1 is fed out and supplied to a seedling planting claw that is operated at a fixed position to perform seedling planting operation. In such a reciprocating left and right movement of the lead cam 2, the expansion / contraction boots 4 and 5 disposed on the left and right sides of the lead cam 2 are expanded and contracted, and the boot chambers 6 and 7 covering the outer peripheral portion of the lead cam shaft 3 are expanded and contracted. When the lead cam 2 moves to the left side with respect to the lead cam shaft 3, the left boot chamber 6 is reduced, the right boot chamber 7 is expanded, and when the lead cam 2 moves to the right side, Conversely, the right boot chamber 7 is reduced and the left boot chamber 6 is expanded. In such expansion and contraction of the left and right boot chambers 6 and 7, since they communicate with each other so as to be freely permeable, the communication between the communication portions of the boot chambers 6 and 7 flows from the high pressure side to the low pressure side according to the air pressure. Thus, the expansion / contraction of the expansion / contraction boots 4 and 5 does not become a resistance of the expansion / contraction operation, and smooth expansion / contraction is performed, and the suction of muddy water from the outside is prevented, so that sliding friction with the lead cam 2 portion and the like on the lead cam shaft 3 is prevented. A lubricating oil surface is formed on the part, and the seedling tank 1 is moved smoothly.

  Further, a lubrication oil supply device 9 for lubricating the fitting sliding portion of the lead cam 2 with respect to the lead cam shaft 3 is provided in the communication pipe 8 communicating between the boot chambers 6 and 7 between the left and right expansion / contraction boots 4 and 5. As described above, the right and left expansion and contraction boots 4 and 5 expand and contract in the communication pipe 8, whereby the air in the left and right boot chambers 6 and 7 flows to reduce the expansion and contraction resistance of the expansion and contraction boots 4 and 5. At the same time, since the lubricating oil supply device 9 communicates with the communication pipe 8, the lubricating oil supplied from the lubricating oil supply device 9 is supplied to the lead cam shaft 3 and the lead cam 2 of the left and right boot chambers 6, 7. Supply to the fitting sliding part and lubricate.

  The lubricating oil device 9 supplies lubricating oil for the seedling transmission device 11 that transmits the lead cam shaft 3 and the seedling planting device 10. The seedling planting device 10 causes the seedling tank 1 to reciprocate left and right by driving the lead cam 2 or the lead cam shaft 3 by the transmission of the seedling planting transmission device 11 to feed and feed the seedlings, The seedlings fed from the seedling tank 1 are separated and held and planted on the soil surface. The lubricating oil supply device 9 supplies a part of the lubricating oil that performs the lubricating action of the seedling transmission device 11 to the left and right boot chambers 6 and 7 so that the lead cam shaft 3 and the lead cam 2 slide. Lubricate the part.

  Furthermore, the convex part 14 which forms the gap | interval 13 between this folding overlapping surfaces 12 between the folding overlapping surfaces 12 of the bellows outer periphery of the expansion / contraction boots 4 and 5 is formed. The expansion / contraction boots 4 and 5 expand and contract the boot chambers 6 and 7 by forming a bellows-shaped folding overlapping surface 12 and expanding and contracting the gap 13 between the adjacent folding overlapping surfaces 12. When the boot chambers 6 and 7 are contracted, the folding overlap surfaces 12 are compressed to be folded and overlapped with each other, and the convex portions 14 are held between the folding overlap surfaces 12. By interposing the convex portion 14 between the folding overlapping surfaces 12 of the expansion / contraction boots 4 and 5, the close contact between the folding overlapping surfaces 12 is prevented. It is easy to spread between twelve.

  The communicating portion that communicates between the left and right boot chambers 6, 7 is provided by bypassing the communication pipe 8 over the outer periphery of the lead cam 2 that connects the inner ends of the expansion / contraction boots 4, 5, and between the boot chambers 6, 7. Communicate to facilitate air flow. Further, without bypassing the communication pipe 8, for example, a communication path may be formed in the metal of the lead cam 2 so that the left and right boot chambers 6 and 7 communicate with each other.

  An oil tank communicating with the communication pipe 8 is connected as a lubricating oil supply device 9 by an oil supply hose 18, and the suction pressure is applied to the oil tank by expansion and contraction of the boot chambers 6, 7. It can also be configured to inhale into 7. Further, the lubricating oil supply device 9 may be configured such that the oil is sprayed into the boot chambers 6 and 7 by a plunger injection mechanism or the like.

  Further, as shown in FIG. 4, the boot chambers 6 and 7 are communicated with the inside of the seedling planting transmission case 30 by the oil supply hose 19, and a part of the lubricating oil in the seedling planting transmission case 30 is sucked into the boot chamber 6. , 7 can also be configured to lubricate.

  The expansion / contraction boots 4 and 5 are formed in a bellows shape from a rubber material or the like, but the outer peripheral surfaces of the expansion / contraction boots 4 and 5 may be polymerized in close contact with the adjacent folding polymerization surfaces 12 during reduction A. At this time, the convex portion 14 is formed so as to form a gap 13 portion between the folding overlapping surfaces 12. The protruding portion 14 abuts against the opposite folding overlapping surface 12, and a gap is formed around the protruding portion 14. When 13 parts are formed and the boot chambers 6 and 7 are expanded B, the folding overlap surfaces 12 are easily opened.

  Next, mainly based on FIG. 1 and FIG. 6, in the transmission configuration of each seedling planting rotor 17 and this seedling planting claw 29, the sprocket 56 of the rotor shaft 55 is engaged with a chain 57 and an eccentric gear. The sprocket 56 is configured to rotate at an inconstant speed by the transmission rotation of the eccentric gear. Therefore, when a protrusion 58 is formed at a fixed position of the sprocket 56 and the protrusion 58 rotates and approaches the magnet 59 provided in the seedling planting transmission case 30, a magnetic speed rotation resistance is generated, and this non-uniform rotation is prevented. It is designed to alleviate and reduce the transmission phenomenon. In this case, the positions of the protrusion 58 and the magnet 59 are set immediately after the peak of the inconstant speed rotation due to the eccentric gear. Metal powder is adsorbed by the magnetic force of the magnet 59 to improve the durability of the rotating part.

Next, mainly based on FIG. 7, the operation of the main transmission lever 60 that performs the shifting operation of the hydraulic continuously variable transmission 41 is fixed by the half-depressing operation of the brake pedal 61 to restrict the shifting operation. It is intended to improve safety by preventing sudden start-up and rapid acceleration when storing the seedling transplanter, when loading next to the truck for transportation, or when traveling over the ridge. The main transmission lever 60 rotates the trunnion shaft 62 of the hydraulic continuously variable transmission 41 and operates it from the neutral position N to the forward position F or the reverse position B to perform forward high speed or reverse high speed travel shift. It can be carried out. A bifurcated forward neutral arm 63 and a reverse neutral arm 64 which are integrally rotated around the trunnion shaft 62 by the main transmission lever 60 are provided, and an angle between the forward neutral arm 63 and the reverse neutral arm 64 is provided. Are connected to the connection plate 65 on the coaxial 62, the long holes 66 and 67 on the arms 63 and 64, and the bolts 68 and 69 which are fitted and tightened to the arms 63 and 64 so that the opening degree can be adjusted. The brake pedal 61 has a pedal shaft 70 disposed immediately below the trunnion shaft 62, and a forward neutral return cam 71 and a reverse neutral return cam 72 are formed around the pedal shaft 70 of the brake pedal 61. By depressing the brake pedal 61 and braking the traveling brake, the forward neutral return cam 71 or the reverse neutral return cam 72 pushes the opposite forward neutral arm 63 or reverse neutral arm 64 to move to the forward position F or reverse position. The main transmission lever 60 at B is operated to return to the neutral position N. Further, the depression position of the brake pedal 61 is often operated as a half depression state (half brake state). In these cases, the main transmission lever 60 returns to the neutral position N or a position close to the neutral position N. Thus, the forward position F or the reverse position B is restricted from being actuated to the speed increasing side.
Next, mainly based on FIG. 8 and FIG. 9, when the work mounting shaft 76 is fitted and mounted to the hitch socket 75 and the mounting pin 79 is inserted into the pin holes 77 and 78 of the mounting portion and fixed, A base portion of the mounting pin 79 is formed in a crank shape, and an engaging portion 80 that rotates around the mounting pin 79 and fits to the outer peripheral surface of the hitch socket 75 is formed. The working tool is configured to be mounted as a stock rake 81 in place of the stock rotor 54. Reference numeral 82 denotes a bracket for mounting the hitch socket 75. A convex portion 83 for engaging the concave portion of the hitch socket 75 is formed inside the front end of the engaging portion 80 so that the mounting pin 79 can be easily prevented from coming off by the engagement.

  Next, mainly based on FIG. 10, FIG. 11, and FIG. 12, a damper is provided on the wheel of the seedling transplanter, and the vehicle body support pressure by the damper is switched between strong and weak depending on the steering operation, or the wheel lift is restricted. It is to be controlled. An axle steering case 86 that axially mounts the axle 85 of the front wheel 23 and the rear wheel 24 is provided around the steering shaft 88 at both left and right ends of the axle housing 87 so as to be steerable and rotated by the steering handle 20. Steering can be linked. The axle housing 87 is transmitted from the interlocking shaft 89 to the steering shaft 88 by meshing with the bevel gear 90, and further, the axle 85 can be driven to rotate by meshing with the bevel gear 91.

A terminal case 92 at the end of the axle housing 87 is provided around the steering shaft 88, and the upper end of the steering case 86 is fitted around the terminal case 92 so as to be rotatable and slidable. Further, a coupling 94 containing springs 98 and 99 is provided at the upper end portion of the terminal case 92, and the arm of the upper end portion of the arm 93 projecting upward from the steering case 86 on the outer peripheral portion of the coupling 94. The cylinder 104 is fitted so as to be rotatable and slidable. The strong and weak springs 98 and 99 are interposed between the plate 95 at the upper end of the terminal case 92, the upper end of the coupling 94, and the seat 97 of the actuator 96. On the other hand, the weight of the vehicle body 15 on the axle housing 87 side is supported. By changing the compression force of the weak spring 99 by the actuator 96 , the wheel support force by both the springs 98 and 99 can be adjusted and switched.

  Further, an actuator 100 for regulating the rear wheel up and down is provided between the axle housing 87 of the rear wheel 24 and the steering case 86, and the vertical movement range of the axle housing 87 of the rear wheel 24 by expansion and contraction of the actuator 100. Can be regulated.

  The controller 101 that controls the front and rear wheel 23, the rear wheel 24 strength actuators 96, and the rear wheel 24 up-and-down regulating actuator 100 includes an auxiliary transmission lever sensor 102 on the input side, and a planting lifting operation switch. 103 etc. are provided. When the sub-shift lever sensor 102 detects the vehicle traveling speed of the vehicle speed, the actuator 96 controls the damper of the front wheel 23 or the rear wheel 24 to soften, and when the low speed seedling traveling speed is detected, the damper is controlled to harden. In addition, the seedling raising / lowering operation switch 103 can be used to raise and lower the seedling planting device 10 using the lift cylinder 27 to lower the seedling planting posture or raise it to a non-planting posture. By doing so, the expansion and contraction of the actuator 100 can be fixed to prevent the rear portion of the vehicle body 15 from sinking.

The damper mechanism as shown in FIG. 12 is constituted by an axle housing on the front wheel 23 or rear wheel 24 side, and the axle housing of the rear wheel 24 is supported by a damper spring so as to be movable up and down simply as shown in FIG. It is also possible to adopt a form that does not require steering. An axle case 105 having an axle 85 with respect to the vehicle body 15 is provided to swing up and down around the case support shaft 106. A damper is provided between the bracket 107 of the axle case 105 and the bracket 108 on the vehicle body 15 side. Springs 98 and 99 are provided. Of these, the weak spring 99 is configured to adjust the pressure by an actuator 96. Also, the bracket 108 on the vehicle body 15 side is provided with an actuator 109 for restricting the vertical movement of the rear wheel 24, and a pin 110 extended by the actuator 109 is applied to the stopper 111 of the axle case 105, The upward movement of the axle case 105 relative to the vehicle body 15 is locked.

DESCRIPTION OF SYMBOLS 1 Seedling tank 2 Lead cam 3 Lead cam shaft 4 Expansion / contraction boot 5 Expansion / contraction boot 6 Boot chamber 7 Boot chamber 8 Communication pipe 9 Lubricating oil supply device 10 Seedling device 11 Seedling transmission device
15 body
17 seedling rotor
30 seedling transmission case
41 hydraulic continuously variable transmission
56 sprocket
58 protrusions
59 magnet
60 main shift lever
61 brake pedal
62 trunnion shaft
63 forward neutral arm
64 reverse neutral arm
71 Forward neutral return cam
72 reverse neutral return cam

Claims (3)

A seedling planting device (10) is provided on the rear side of the vehicle body (15) to be movable up and down,
該苗planting device provided integrally with the lead cam (2) seedlings tank (1) constituting the (10), the lead cam shaft to which the lead cam (2) Ru is reciprocated in the width Direction seedlings tank (1) (3 ) is provided, the lead cam (2) of the lead cam shaft on the left and right side portions of the (each covering a pair of right and left scaling boot an outer peripheral portion of 3) (4,5) provided, said pair of scaled boots (4,5) in Provided with a communication pipe (8) for allowing ventilation between the boot chambers (6, 7)
A lubricating oil supply device (9) for supplying lubricating oil to a seedling planting transmission device (11) that transmits the lead cam shaft (3) and the seedling planting device (10) is provided. A configuration in which part of the lubricating oil that performs the lubricating action of the transmission (11) is supplied to the left and right boot chambers (6, 7) and supplied to the sliding portions of the lead cam shaft (3) and the lead cam (2). A seedling transplanter characterized by that . A seedling planting rotor (17) for taking seedlings from the seedling tank (1) and planting them is provided at the rear end of the seedling planting transmission case (30) constituting the seedling planting transmission device (11). ) Is provided with a rotor shaft (55) for transmitting a driving force, the rotor shaft (55) is provided with a sprocket (56), and an eccentric gear for rotating the sprocket (56) at an infinite speed is provided,
Protrusions (58) are provided on the sprocket (56), magnets (59) are provided on the seedling planting transmission case (30),
The magnet (59) is disposed at a position where the protrusion (58) approaches immediately after the inconstant speed rotation of the sprocket (56) by the eccentric gear reaches a peak, and the sprocket (56) is provided with rotational resistance due to magnetic force. The seedling transplanter according to claim 1, wherein the seedling transplanter is generated . The vehicle body (15) is provided with a hydraulic continuously variable transmission (41), a main transmission lever (60) for performing a shifting operation of the hydraulic continuously variable apparatus (41) is provided, and interlocked with the operation of the main transmission lever (60). A forward neutral arm (63) and a reverse neutral arm (64) rotated around the trunnion shaft (62),
A pedal shaft (70) is provided below the trunnion shaft (62), a brake pedal (61) rotating around the pedal shaft (70) is provided, and a forward neutral return cam (71) is provided on the brake pedal (61). And a reverse neutral cam (72),
When the brake pedal (61) is operated, the forward neutral return cam (71) comes into contact with the forward neutral arm (63), or the reverse neutral return cam (72) comes into contact with the reverse neutral arm (64). ) To the neutral position (N),
When the brake pedal (61) is operated in a half-depressed state, the main transmission lever (60) moves to a neutral position (N) or a position close to the neutral position (N), and the forward position ( The seedling transplanter according to claim 1, wherein the movement of the reverse position (B) to the speed increasing side is restricted .

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