JP2003153618A - Rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize and maintain the accuracy of transplantation by enabling good transplantation during turn while reducing the influence of a side float 35 on an already transplanted seedling, and by enabling the transplantation operation while precisely erasing the track of a wheel 8 while minimally reducing the amount of mud pushed to neighboring seedlings. SOLUTION: This rice transplanter has a center float 34 and a side float 35 mounted on the lower part of a transplanting part 15. The side float 35 is formed into a portal form in the plane view. The length of an outside rear extended part 176 in the front and rear direction is formed shorter than that of an inside rear extended part 175, and the right and left width W1 of the inside rear extended part 175 of the float at the rear side of the position of the wheel 8 is regulated so as to be nearly same as the right and left width W3 of the wheel 8 or so as to satisfy the relation of W1>=W3. The right and left width W2 of the outside rear extended part 176 of the float is regulated so as to be narrower than the right and left width W1 of the inside rear extended part 175 of the float and so as to satisfy the relation of W1>W2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice transplanter equipped with a seedling table, a nail for planting seedlings, and the like for continuously performing seedling planting work.

[0002]

As shown in FIG. 39, in the conventional side float S having a gate shape in plan view, the rear ends of the side floats S have substantially the same width S1 on the left and right sides and substantially the same horizontal line S2. In the state of being located on the upper side, the rear end of the outer rear extension portion was brought into contact with the adjacent seedlings during the planting work, and the effect of pushing mud on the adjacent seedlings was great. Further, the front left and right corners S3 of the side floats S also have a symmetrical relationship in which they are formed in substantially the same shape on substantially the same horizontal line, and there is a constant gap L between the wheel T and the front surface of the side float at this rear position. When securing the, the overall length of the aircraft will be longer.

[0003]

SUMMARY OF THE INVENTION Therefore, according to the present invention, in a rice transplanter equipped with a center float and a side float below a planting section, the side float is formed in a gantry shape in plan view, and an inner rearward extending section is formed. The front-rear length of the outer rear extension portion is formed to be short, the left and right width of the float inner rear extension portion behind the wheel position is formed to be substantially the same as or wider than the wheel left-right width, and the left and right sides of the float outer rear extension portion are formed. The width is made narrower than the left and right width of the rear inner extension part of the float to enable good surrounding planting with a small effect of side floats on existing seedlings and minimize mud pushing on adjacent seedlings. It enables the planting work to surely erase the wheel marks while keeping it at a high level, and maintains the planting accuracy in a stable manner.

In addition, the front positions of the side floats corresponding to the wheels are formed in the recesses to secure a clearance between the wheels and the side floats, thereby making it possible to easily reduce the overall length of the body and to allow the water flow to the adjacent seedlings. Instead of pouring into the wheel marks, the effect on adjacent seedlings is reduced and the leveling performance is improved.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a side view of a passenger rice transplanter, and FIG. 2 is a plan view of the same. In FIG. 1, 1 is a traveling vehicle on which an operator rides. An engine 2 is mounted on a body frame 3 and a longitudinal mission in the front-rear direction. A front wheel 6 for traveling paddy fields is supported in front of the case 4 via a front axle case 5, and a rear axle case 7 behind the mission case 4 supports rear wheels 8 for traveling paddy fields. Then, the spare seedling mounts 10 are attached to both sides of the hood 9 that covers the engine 2 and the like, and the mission case 4 and the like are covered by a vehicle body cover 11 on which an operator rides.
The driver's seat 13 is attached to the upper surface of the driver's cab 12 on the rear side, and the steering wheel 1 is provided in front of the driver's seat 13 at the rear of the hood 9.
4 is provided.

Further, in the figure, 15 is a seedling table 16 for four-row planting.
In addition, the planting frame 2 is a planting unit having a plurality of seedling planting claws 17 and the like, and the forward tilting type seedling platform 16 made of a synthetic resin having a high front and rear low is mounted via a lower rail 18 and a guide rail 19.
The rotary case 21 is slidably supported in the left-right direction and is rotated at a constant speed in one direction.
0, the pair of claw cases 22 and 22 are arranged symmetrically with respect to the center of the rotation axis of the case 21, and the claws 17 and 17 with seedlings are attached to the tips of the claw cases 22 and 22. Further, left and right side frames 23, 23 are erected on both left and right sides of the planting frame 20 to support the seedling stand 16, and a hitch bracket 24 at the left and right center of the planting frame 20 includes a top link 25 and a lower link 26. It is connected to the traveling vehicle 1 via the elevating link mechanism 27, the hydraulic elevating cylinder 28 provided in the traveling vehicle 1 is connected to the lower link 26, and when the elevating cylinder 28 is driven, the planting portion 15 is moved up and down via the link mechanism 27. , When the planting section 15 descends, one seedling worth of seedlings is planted from the seedling platform 16 which slides back and forth to the left and right.
It is taken out according to No. 7, and the seedlings are continuously planted.

Further, in the figure, numeral 29 is a main gear shift lever, numeral 30 is a seedling splicing lever that enables operation such as traveling stop at a position where the aircraft is on board as well as when the aircraft is dismounted, 31 is a planting lifting lever, and 32 Is a main clutch pedal, 33 and 33 are left and right brake pedals, 34 is a center float for leveling two rows, 35 is a side float for leveling one row, 36 is a side row fertilizer for four rows, and 37 and 37 are rear It is an auxiliary wheel to be deployed outside the wheel 8.

The side-strip fertilizer applicator 36 includes a fertilizer hopper 38 for storing fertilizer, a fertilizer feeding case 39 which is a fertilizer feeding portion for feeding fertilizer, and a side-grooving device 4 for floats 34 and 35.
0 is equipped with a turbo blower type blower 42 for discharging fertilizer via a flexible type transfer hose 41, and a cylindrical air tank 43, and the blower 42 is attached to the right end of the air tank 43, and four sets of four fertilizer feeding cases are provided. 39 is arranged on the upper side of the air tank 43, and the upper end of the seedling placing table 16 is closely arranged behind the fertilizer hopper 38.

As shown in FIG. 3 to FIG. 12, the planting frame 20 is a pipe-made left-right vertical frame 44a for two lines each.
44b and a horizontal pipe frame 45 that connects between the front ends of the left and right vertical frames 44a and 44b, and a cruciform frame joint (cross pipe joint) 46 formed by bulging is provided at the rear end of each vertical frame 44a and 44b. The rotary case 21 is rotatably supported by the joint 46 via the rotary shaft 47 by welding, and the left and right cross-shaped frame joints (cross pipe joints) 48a and 48b formed by bulging are formed horizontally with the vertical frames 44a and 44b. The frame 45 is welded and fixed, and the vertical and horizontal frames 44a, 44b, 45 are integrally connected to each other to form the lightweight planting frame 20 at a low cost.

Further, a planting input shaft 49 is provided at the front end of the right frame joint 48b, and the PTO of the mission case 4 is provided.
The driving force from the shaft is transmitted to the input shaft 49 via the universal joint shaft 50, and the input shaft 49 is interlockingly connected to the planted drive shaft 51 provided in the horizontal frame 45 via the bevel gears 49a and 52, and the left and right vertical frames are also connected. The planting pawl drive shaft 53 provided in 44a / 44b is connected to the planting drive shaft 51 via the bevel gears 52/54 and the safety clutch 55, and the rotary shaft 4
7, the bevel gears 56a and 56b and the planting claw unit clutch 57 are connected to the planting claw drive shaft 53 in an interlocking manner to drive the seedling planting claws 17.

Further, a seedling feeding shaft 58 for laterally feeding the seedling mounting table 16 in the left-right direction and longitudinally feeding the seedlings mounted on the seedling mounting table 16 is provided with a seedling feeding case 59 made of aluminum die casting to drive the planting drive shaft 5.
The left frame joint 48
The one end side flange portion 61 of the seedling feeding case 59 is bolted and fixed to the left side flange portion 60 of a, and the left end of the seedling feeding shaft 58 is inserted into and supported by the other end side of the case 59. Between the feed shaft 58, a transmission mechanism 64 formed by two sets of switching gears 62, 63 for shifting high and low is interposed,
By providing the left half of the seedling feed shaft 58 to the seedling vertical feed cam shaft 65 and the right half of the seedling feed shaft 58 to the seedling stand horizontal feed screw shaft 66 with respect to the approximate center of the machine body, the seedling placement table 16 is driven when the seedling feed shaft 58 is driven to rotate at high or low second speed. And the vertical feeding of the seedlings on the seedling mounting table 16.

As shown in FIGS. 30 and 33, a planting depth adjusting fulcrum shaft 67 is rotatably supported on the lower side of the front end of the planting frame 20, and the brackets on the upper surfaces of the rear ends of the floats 34 and 35. 68 and 69 are connected to the fulcrum shaft 67 via the planting depth adjusting links 70 and 71, and a change in float inclination angle (planting depth) is detected by an elevating link 72 that is connected to the front end of the center float 34. , The fulcrum shaft 67
The reference planting depth is adjusted by a planting depth adjusting lever 73 having a fixed base end.

In addition, L-shaped left and right side bumpers 74 are provided at the left and right ends of the fulcrum shaft 67 so as to be foldable outward through a bumper mounting member 75.

As shown in FIGS. 13 to 16, the base ends of the left and right side markers 76 are foldably (raised) supported near the left and right ends of the fulcrum shaft 67, and the fulcrum shaft 67 is supported.
The bending portion 76a at the base end of the marker 76 at a position near the inside of the bumper mounting member 75 is rotatably supported, and a torsion coil spring type marker is provided between the marker arm 78 fixed to the base end of the marker 76 and the bumper mounting member 75. By interposing the fall spring 79,
A standing wire 80 for standing up the marker 76 is connected to the marker arm 78, and a hook 82 for standing up and holding the marker 76 by engaging the engaging shaft 81 of the marker arm 78 during standing up of the marker 76 is provided on the fulcrum shaft 67. A release wire 8 that is rotatably provided via a pin 83 and that disengages the hook 82 that holds the marker 76 upright against the force of the hook spring 84.
5 is provided between the hook 82 and the elevating / lowering lever 31 with a plant, and in association with the raising operation of the planting part 15, the standing wire 80 is pulled to erect the marker 76 to engage and hold the hook 82, and the elevating / lowering lever 31 with a plant. Either the left or right hook 82
The left or right marker 76 is laid down in the lateral direction by releasing the engagement.

As shown in FIGS. 8, 9, 14, and 15, one end of each of the two standing wires 80 for the left and right markers 76 is attached to the left and right marker arms through the wire receiver 87 on the rear frame 86 of the vehicle body frame 3. The other end of the standing wire 80 is connected to 78, and the universal joint shaft 50 is arranged on the right side and the two standing wires 80 for the left and right markers are arranged on the left side around the lower link 26 arranged on the machine center line. ,
An outer receiver 88 on one end side of the outer tube 80a of the standing wire 80 is fixed to the rear left outer side of the lower link 26, and an outer receiver 89 on the other end side of the outer tube 80a is fixed to the fulcrum shaft 67. The marker wire 78 and the marker arm 78 are connected by the inner wire 80b of the erection wire 80, and the left and right markers 76 are erected in association with the rise of the planting portion 15.

As is apparent from the above, in the rice transplanter in which the left and right side markers 76 are folded through the upright wire 80 which is a marker wire in association with the rise of the planting portion 15,
The universal joint shaft 50, which is a planted transmission shaft for inputting a driving force to the planting portion 15, is provided on one side on the left and right with respect to the center of the machine, and the wire 8 is provided on the other side.
By disposing 0, without paying attention to the use of a clamp or the like for avoiding contact with the universal joint shaft 50,
While securely preventing the joint shaft 50 and the wire 80 from being wound, the joint shaft 50 and the wire 80 can be stably held, and
The right and left weight balance between the joint shaft 50 and the wire 80 can be made good, and stable holding of the machine body can be achieved.

Further, by disposing the outer tube 80a, which is the outer member of the standing wire 80, on the lower link 26 and the inner wire 80b on the vehicle body frame 3, respectively, the inner wire 80b and the inner wire 80b are attached to the conventional lower link 26 and the planted hitch. Compared to the structure in which the outer tube 80a is arranged, the outer tube 80a is arranged substantially parallel to the front-rear direction on the outside of the machine body, and is simply arranged to facilitate assembly and adjustment and reduce operation loss.

Further, the standing wire 80 is connected to the lower link 2
By arranging in the vicinity of the six sides, the standing wire 80 is prevented from being stretched or loosened when the planting portion 15 is moved up and down without being affected by the lifting link mechanism 27, which is simple. The erection wire 80 is arranged so that the marker 76 can be reliably erected and the reliability can be improved.

Further, in this case, the standing wire 80 is disposed on the side of the lower link 26 at substantially the same height as the lower link 26 to ensure a sufficient pulling stroke of the marker 76, and the single outer receiver 88 is secured. The two standing wires 80 are integrally supported, and the wire 80 does not interfere with other parts, has a good wire life, and can be arranged at low cost and lightweight.

As shown in FIGS. 18 and 19, the seedling table 16
A seedling removing plate 90 at the lower end is moved up and down, and a seedling removing plate 91 for adjusting the seedling picking amount is supported by a guide member 92 of the planting frame 20 via a guide rod 93 so that the seedling removing plate 90 can be moved up and down. An engaging plate 95 for engaging the cut groove 94 is provided on the seedling taking amount adjusting shaft 96 in the left-right direction, and the seedling taking amount adjusting shaft 96 is provided.
The seedling amount for one stock taken out by the seedling planting claw 17 is adjusted by operating the seedling taking amount adjusting lever 97 connected to the left end side of the seedling feeding case 59 and the vertical frames 44a and 44b.
The horizontal shaft portion 96a of the seedling collection amount adjusting shaft 96 is attached to each bearing plate fixed to the
Is rotatably supported, and the left end side of the horizontal shaft portion 96a is bent outward by about 90 degrees outside the seedling feeding case 59 to form a longitudinal axis portion 96b in the front-back direction. Then, the front end of the vertical axis portion 96b is bent inward at about 90 degrees to form a lever mounting portion 96c, and the base end of the L-shaped adjusting lever 97 is fixed to the mounting portion 96c with two bolts 98. , The tip of the lever 97 is extended obliquely above and forward of the lever guide 99 so as to face between the left rear wheel 8 and the auxiliary wheel 37, and the seedling feeding case 59 is protected by surrounding each part with 96a, 96b, 96c. Along with the case 59 and the seedling collection adjustment shaft 96
The transport hose 41 is positioned in the gap 100.

As shown in FIGS. 11 and 12, the hitch bracket 24 includes a top link 25 and a lower link 2.
6. A fulcrum member 103 having upper and lower link shafts 101 and 102 for connecting 6 and holding and fixing by welding in a substantially central position of the horizontal frame 45 of the planting frame 20 is freely rotatable on the lower end of the bracket 24 via a rolling fulcrum shaft 104. The hydraulic rolling cylinder 106 is attached to the mounting seat 105 at the upper end of the bracket 24, and the piston rod 10 of the cylinder 106 is connected.
7 Fixing bracket 1 at the upper end of right side frame 23
08, a gear pump 109 that reciprocally drives the double-acting cylinder 106, a reversible electric motor 110 that drives the pump 109 forward and backward, and an oil tank 111 are integrally provided in the cylinder 106. 105 A pendulum type rolling sensor provided on the horizontal frame 45 on the left side of the hitch bracket 24 by tensioning the rolling correction spring 113 between the left and right ends of the upper guide rail 19 on the back side of the seedling mounting table 16 and the receiving plate 112 fixed on the upper surface of the hitch bracket 24. When 114 detects the inclination of the planting part 15, the piston rod 107 of the cylinder 106
Is controlled so that the planting part 15 is horizontally swung around the fulcrum shaft 104 to horizontally hold the planting part 15.

Further, the horizontal frame 45 and the fulcrum member 10
3 A bracket 115 to be fixed to the right end by welding is provided, and the bracket 115 and the bracket 108 at the upper end of the right side frame 23 are reinforced and connected by an oblique stay 116,
With the lightest structure, the rigidity of the right side frame 23 is improved to ensure the rolling performance.

As shown in FIGS. 10, 12, 16 and 17, the middle and right ends of the seedling feed shaft 58 are supported by the horizontal frame 45 via the bracket 115 and the bearing plate 117. Two pipes 119, which are substantially parallel to the seedling feed shaft 58, are extended to the right outside of the right flange portion 118 of 48b, and a bearing plate 117 is attached to the extended end of the pipes 119 to attach the bracket 115 and the bearing plate 11.
7, both ends of the lateral feed screw shaft 66 are supported via bearings 120, the right end of the vertical feed cam shaft 65 is fed to the left end of the screw shaft 66 via a square pipe joint 121, and the left end of the cam shaft 65 is fed to the seedling. The vertical feeding cam shaft 65 and the screw shaft 66, which are divided into left and right, are connected to the case 59 so as to have a double-supported structure to improve the supporting strength, and the right end of the vertical feeding cam shaft 65 has the same axis. It is configured to be connected to the screw shaft 66 to improve the vertical feed accuracy. The cam shaft 65 is a hollow iron pipe, and the screw shaft 66 is a solid iron member.
9 and the cam shaft 65, and a screw shaft 66 having a large weight on the right side are arranged so as to be distributed so as to obtain a good left-right balance.

As shown in FIGS. 7, 10, 20, and 37, a slider 122 is screwed to the screw shaft 66, and the slider 12 is attached to the seedling table 16 via a slider receiver 123.
4 are connected to each other, the seedling mounting table 16 is reciprocated left and right when the screw shaft 66 is rotated in one direction, and the vertical feed cam shaft 6 is connected.
5 has a left and right vertical feed cam 124, and when the seedling placing table 16 moves to the left and right moving end, the vertical feed cam 124 is brought into contact with the driven cam 125 and the vertical feed roller shaft 127 is moved through the one-way clutch 126. The vertical feed belt 13 that is rotated in the direction and is wound around the vertical feed rollers 129 and 130 of the pair of upper and lower roller shafts 127 and 128 provided on the lower end side of the seedling mounting table 16.
1 is moved to the lower end direction for one seedling.

Further, as shown in FIGS. 16 and 17, the right side flange portion 118 and the bearing plate 117 are provided with notches 132 and 133 for mounting the screw shaft on the upper portion thereof, and the bearing 120 is mounted on the screw shaft 66. To facilitate attachment to the flange 118 and the bearing plate 117, and to weld and fix the rod-shaped marker storage hook 134 that engages and holds the marker 76 when the right side marker 76 is retracted to the upper side of the bearing plate 117. ing.

Further, a part of the lower side of the right side flange portion 118 is extended downward to form a raising stopper portion 135 of the right side float 35 so that when the right side float 35 is swung up, another operation is performed. It is configured to prevent interference with other parts.

As is apparent from the above, a lateral feed screw shaft 66 which is a lateral feed shaft for laterally feeding the seedling table 16 in the left-right direction.
In the rice transplanter equipped with the above, a plurality of pipes 119, which are shaft-shaped members, are extended from the planting frame 20 substantially in parallel with the lateral feed screw shaft 66 to support one side of the lateral feed screw shaft 66. By attaching the plate 117 to the pipe 119, one side of the lateral feed screw shaft 66 is attached to the plurality of pipes 1.
Supporting without deforming at 19, transverse feed screw shaft 66
It is possible to support the lateral feed screw shaft 66 with a simple and lightweight structure by receiving the force due to the pulling of the pipe 119 and the like with high accuracy.

Further, by providing the bearing plate 117 with the marker storage hooks 134 for holding the side markers 76 upright, for example, the rod-shaped hooks 134 can be used as the bearing plate 117.
The bearing plate 117 is also used as a guide at the time of storage so that the marker 76 can be securely held upright and stored, and the cost and weight of the marker storage mechanism can be easily reduced. Can be made possible.

As shown in FIGS. 13 to 15, the lower surface of the seedling feeding case 59 is formed into a curved surface portion 59a, which is used as a stopper when the left side float 35 is raised by rocking, and the left side marker is used. The marker storage hook 136 made of spring steel for engaging and holding the marker 76 when the maximum storage of 76 is detachably attached to the outer surface of the case 59 with a bolt 137.
It is fixed and fixed.

The hook 136 is used for the seedling feeding case 5.
9 Extend outward to the left and bend the tip into a substantially triangular shape in plan view to form the engaging portion 136a of the marker 76. The engaging portion is located closer to the center of the machine than the position of the marker 76 when the planting portion 15 is raised. 136
a is arranged to prevent the marker 76 from being caught on the hook 136 when the planting part 15 is raised, and the marker 76 and the hook 1
Even if there is a difference in the positional relationship of the markers 36 or when the fulcrum shaft 67 rotates due to a change in the planting depth and the attitude of the marker 76 changes, the slack of the hook 136 causes the marker 76 to be satisfactorily engaged and held. ing.

Further, as shown in FIG. 3, two left and right units lever boxes 139 are provided at the front position of the fertilizer applicator 36.
Two unit clutch levers 140 for the strip are provided, and FIG.
As shown in FIG. 0, each clutch wire is provided to the vertical feed unit clutch 141, the planting claw unit clutch 57, and the fertilizer unit clutch that turns the fertilizer feeding case 39 on and off, provided on both ends of the vertical feed roller shaft 127. The clutch lever 140 is connected via the clutch lever 140, and the left or right two-row vertical feed and the drive of the planting claw 17 and the fertilizer applicator 36 are stopped by operating the clutch lever 140 on either the left side or the right side. As shown, the vertical feed clutch wire 142 connecting the clutch lever 140 and the vertical feed unit clutch 141 is clamped at the middle of the hook 136.

As shown in FIGS. 20 to 22, a driven cam 125 is connected to the seedling taking amount adjusting lever 97 via a vertical feed interlocking wire 143 so that the seedling vertical feeding amount can be changed according to the change of the seedling taking amount. In order to properly feed the seedling vertically according to the seedling picking amount, the interlocking wire 14 is provided between the lever arm 144 of the adjusting lever 97 and the protruding pin 145 on the outer side surface of the driven cam 125.
The inner wire 143b of No. 3 connects the lateral frame 45 and the outer receivers 146 and 147 fixed to the rear surface of the seedling mounting table 16 with the outer tube 143a. Then, in the inner wire 143b on the adjustment lever 97 side, the outer tube 143a is positioned forward and the inner wire 143b is positioned.
By pulling b toward the front side, it is possible to effectively prevent the intrusion of muddy water into the outer tube 143a, and
The outer receiver 147 on the seedling stand 16 side is an upper roller shaft 128.
Is fixed to the seedling mounting table 16 by using a mounting member 149 such as a mounting hole of a bearing 148 for supporting the seedling mounting table 16 on the back surface.

As shown in FIGS. 22 to 26, the lever guide 150 for guiding the upper end side of the implantation depth adjusting lever 73 is provided with an adjusting plate 152 having a multi-step engaging notch 151 slidably via a guide rail 153. Adjustment lever 7
3 is detachably connected to the adjusting plate 152 via the notch 151, and a planting depth correction motor 154 for planting work speed sensitive type planting depth automatic adjustment (speed tuning) is provided with a screw shaft 155 and a screw engaging body 156. The adjustment plate 152 is connected so that the reference depth of the planting depth is manually adjusted, and the reference depth of the planting depth is corrected by the correction motor 154 when the traveling speed changes.

The lever guide 150 is a fixing bracket 157 on the front of the horizontal frame 45 on the left side of the center of the machine body.
Attach the right bent side plate 150a of the lever guide 150 to the bolt 1
A plurality of bolt mounting holes 1 that are detachably fixed via 58 and that change the mounting position of the lever guide 150.
When 59 is formed on the guide 150 and the standard planting depth specification such as dense (deep planting) or sparse planting (shallow planting) is changed, the corresponding position (the lever guide 150 is mounted on the upper side as shown in FIG. 24). The mounting position of the lever guide 150 is changed to dense planting at the position and sparse planting at the lower mounting position.

Further, the lever guide 150 and the adjusting plate 152
A switch for fixing the forward / reverse regulating switches 160, 161 for regulating the position of the adjusting plate 152, which changes the relative position with respect to, to the rear surface of the lever guide 150 via screws 162 in a detachable manner, and forming a bend on one side of the adjusting plate 152. The action section 152a is connected to the actuator 160a.1 of the switch 160.161.
Actuator 160 that is set by facing inside 61a
The forward / backward drive control of the correction motor 154 is performed within the distance between a and 161a, and a plurality of screw mounting holes 163 for changing the mounting position of the restriction switches 160 and 161 are formed in the lever guide 150 to allow dense or dense planting. When the reference planting depth such as planting is changed, the corresponding position (as shown in FIG. 26, dense planting when the regulation switches 160 and 161 are in the upper mounting position in the solid line state, and sparse planting in the lower mounting position in the virtual line state). ) To change the restriction switches 160 and 161. In this case, the reference adjustment of the planting depth is performed by using either the change of the attachment position of the lever guide 150 or the change of the attachment position of the restriction switches 160 and 161.

As is apparent from the above, in the rice transplanter in which the horizontal frame 45 of the planting frame 20 is provided with the planting depth adjusting lever 73 for adjusting the planting depth of the seedling, the horizontal frame 45
A plurality of mounting holes 159 for adjusting the mounting position of the lever guide 150 of the implantation depth adjusting lever 73 with respect to the horizontal frame 45.
Alternatively, by forming it on the lever guide 150, it is easy to install the lever guide 150 when changing the standard planting depth specification such as dense planting or sparse planting, or when changing the planting depth according to various regions or user's request. The planting precision can be improved by changing the planting depth as a reference and changing the planting depth as a reference to enable optimal planting depth adjustment according to various conditions.

Further, the planting depth adjusting lever 73 for adjusting the planting depth of the seedling is mounted on the planting frame 20 via the lever guide 150.
In the rice transplanter equipped with, switches 160 and 161 which are lever position regulating members for regulating the operation position of the planting depth adjusting lever 73 with respect to the lever guide 150 are provided,
By attaching the switches 160 and 161 to the lever guide 150 so that the position can be freely changed, for example, a planting work speed sensitive type (speed tuning) automatic planting depth motor can be mounted on the planting depth adjusting lever 73.
With the structure in which the plants are connected, it is possible to easily perform the optimum planting depth adjustment according to various conditions by a simple operation of changing the mounting position of the switches 160 and 161 that regulate the position of the planting depth adjusting lever 73. Can be

As shown in FIG. 18, FIG. 19, FIG. 27, and FIG. 28, the cross-sectional shape of the seedling take-out plate 90, which is a lower guide rail fitted to the lower rail 18 and supporting the seedling placing table 16, is the inlet portion. The lower rail 18 is fixed to the lower surface of the bottom plate 16a of the seedling placing table 16 and the seedling take-out plate 90 is fitted to the lower rail 18 via the sliding member 165.
The bottom plate 16 for sliding contact with the corner fitting portion 90a and the bottom surface of the seedling mat
It has a seedling bottom receiving part 90b along the extension direction of a, and a seedling front receiving part 90c which is vertically inclined by about 90 degrees with respect to the bottom plate 16a slidably contacting the front of the seedling mat, and the bottom plate 16a and the lower rail 1 are provided.
The seedling bottom receiving portion 90b is formed in a straight upward slope at a height position on the extension of the bottom plate 16a from the position below the lower edge 166 of the united portion 8 of FIG. While eliminating inconveniences such as the seedlings being caught on the seedling bottom receiving portion 90b at the seedling take-out port 167 of 90, the lateral feeding of the seedlings on the seedling take-out plate 90 can be performed smoothly to enable the accurate take-out of the seedlings. The seedling bottom receiving portion 90b of the seedling take-out plate 90 is formed in a front-rear-high elevation slope with respect to the vertical feeding direction of the seedling placing base bottom plate 16a, and the seedling placing base 16 is in the lateral feeding operation. The sloped surface of the seedling take-off plate 90 (the receiving part 90
According to b), the seedling placing bottom plate 16a and the seedling mat are not opened, and the close contact state is kept good so that the seedlings can be reliably scraped.

The seedling take-out port 167 of the seedling take-out plate 90 is also provided.
The receiving blade 170 for reinforcing the seedling take-out plate, which is fixedly mounted on the back side of the seedling through the bolt 168 and the seedling guide 169, has a connecting part 170a attached to the fitting part 90a of the seedling take-out plate 90, and a seedling take-out port 167.
Left and right receiving plate portions 170b attached to the left and right sides of the seedling extracting plate 90 centering on the center, and a guide portion 170 for guiding the seedlings to the seedling guide 169 by connecting between the connecting portion 170a and the receiving plate portion 170b.
It is provided in an integral structure in a cono shape in plan view having c and improves the strength of the seedling take-out port 167 of the seedling take-out plate 90, and the seedling planting nail 1
It is configured to stabilize the amount of seedlings taken by No. 7.

As shown in FIG. 29, when the seedling feeding case 59, the planting drive shaft 51 and the cam shaft 65 are connected and connected, a planting slit 171 formed on the inner surface of the seedling feeding case 59. Also, the vertical feed slit 172 and the punch shafts 173 and 174 formed on the drive shaft 51 and the seedling feed shaft 58 (cam shaft 65) are combined, and the seedling feed case 59 and the shaft 51 corresponding to the dense planting specification and the loose planting specification are provided. -It is configured to allow easy assembly of 58.

As shown in FIGS. 30 to 36, the side float 35 is formed in a gantry shape in a plan view, and the rear rear extending portion 175 is formed to have a shorter front-rear length than the inner rear extending portion 175, and the side float 35 is formed in a wheel. The left / right width W1 of the float inner rear extension 175 behind a certain rear wheel 8 is formed to be substantially the same as or wider than the left / right width W3 of the rear wheel 8 (W1 ≧ W3), and the left / right of the float outer rear extension 176 is formed. The width W2 is formed to be narrower (W1> W2) than the lateral width W1 of the float inner rear extension portion 175 (W1> W2) to enable a good peripheral planting with a small influence of the side float 35 on the already planted seedlings, It is configured to enable the planting work to surely remove the marks of the wheels 8 while minimizing the mud pushing on the adjacent seedlings and to maintain the planting accuracy in a stable manner.

Further, the vertical frames 44a and 44b of the planting frame 20 are arranged above the float inner rear extending portion 175, and two rows of seedlings are planted by the seedling planting claws 17 on the left and right sides of the extending portion 175. The extension portion 175 is projected rearward from the rearmost side of the rotation trajectory of the rotary case 21 to protect the rotary case 21 at low cost, and
When the auxiliary wheel 37 is provided at the front position of the float outer rear extension 176 according to the field conditions, the wheel trace of the wheel 37 is also erased by the extension 176.

Further, as shown in FIG. 35, the front position of the side float 35 corresponding to the rear wheel 8 is formed in the recess 177 to secure a clearance between the rear wheel 8 and the side float 35.
Since the float 35 can be arranged as forward as possible, and as a result, the planting portion 15 can be brought as close as possible to the main body, it is possible to easily reduce the total length of the body and to Pour flow M into the trail of the rear wheels instead of adjoining seedlings,
It is configured to reduce the effect on adjacent seedlings and improve soil leveling.

Further, as shown in FIGS. 30 and 31, a bracket 69 fixed to the upper surface of the rear end of the float outer rear extension 176 and an adjustment link 71 fixed to the fulcrum shaft 67 at the base end.
A torsion coil spring 178 for exerting a lifting load on the tip side of the side float 35 is provided between the pivot shaft 17 and the bracket 69 and the adjustment link 71.
9, the coil spring 178 is provided around the bracket 9, and the bracket 69
Two spring engagement holes 180.1 for low and high loads
One end 81 of the coil spring 178 on one side
78a is engaged, and the adjustment link 71 is engaged with the other end side hook 178b of the coil spring 178 to engage the hook 17 of the coil spring 178 with respect to the engagement holes 180/181.
The lifting load on the tip side of the side float 35 can be easily changed by replacing 8a.

As shown in FIG. 31, the hook 178a of the coil spring 178 attached to the pivot shaft 179 and the coil portion 1 are attached.
The neck length b of the pivot shaft 179 into which the spring 78 is inserted is formed to be large (a <b) from the distance a to the end on the 78c side so that the spring hook 178a can be easily replaced with the spring engagement holes 180 and 181. It is configured so that In other words, pivot 1
The attachment length b between the spring washer 178d attached to 79 and the link 71 is formed to be larger than the sum a of the width of the coil portion 178c of the coil spring 178 and the width of the hook 178a, and the engagement of the hook 178a is released. At times, a gap is formed between the link 71 and the hook 178a to facilitate the replacement.

As is clear from the above, in the rice transplanter in which the float 35 is supported below the planting portion 15 via the fulcrum shaft 67 so as to be able to swing up and down, the raising load for applying the raising load to the tip side of the float 35 is applied. By providing a torsion coil spring 178 that is a changing member and adjusting the spring force of the coil spring 178 to be adjustable, it is possible to change to a float 35 having a different length or to attach or detach a fertilizer applicator 36 or a leveler or to push mud depending on field conditions. When it is necessary to change the lifting load of the float 35 according to the condition etc., the spring force can be easily changed by adjusting the spring force of the coil spring 178 without the trouble of replacing the spring each time as in the conventional case. Thus, it is possible to improve the operability and reduce the cost required when changing the float 35 lifting load.

Further, by providing the coil spring 178 which is interposed between the float 35 and the adjustment link 71 which is a float supporting member so that the spring mounting position can be adjusted, the lifting load of the float 35 needs to be changed each time. It is not necessary to replace the spring, and a simple adjustment operation such as replacing the spring 178 can be performed to improve the operability and reduce the cost and improve the planting accuracy.

Further, a torsion coil spring 178 is provided around the pivot shaft 179 between the float 35 and the adjustment link 71, and a space for replacing the coil spring 178 is provided in the pivot shaft 179, for example, a fixing bracket 69 of the float 35. When changing one side of the coil spring 178 to
The coil spring 178 can be freely moved within the space of the pivot shaft 179 to easily change the spring, and the float 3
The lifting load of 5 can be properly maintained.

As shown in FIGS. 30 and 33, a U-shaped pipe float stopper 183 is fixed to a flange 182 for supporting the rotary case 21 and the like on the rear end side of the vertical frames 44a and 44b, and the rotary case 21 rotates. It is configured to effectively prevent interference with the inside side float 35. Further, as shown in FIGS. 6 and 31, the brackets of the left and right side frames 135 are arranged such that the rising portions 69a are oriented toward the inside of the machine body, and the pivot shafts 179 attached to the rising portions 69a are projected toward the inside of the machine body so that the coil springs 17
8 is arranged inside the adjustment link 71, and the fulcrum shaft 67
The empty spaces at both ends are made large so that a sufficient mounting space for the side markers 76 can be secured.

14, FIG. 15, FIG. 18, FIG. 30, and FIG.
As shown in, the left and right ends of the seedling picking plate 90 and the left and right side bumpers 74 are foldably provided inside the machine body. Divided and formed into divided bodies 184, and a sliding body 185, a rotating shaft 186, a connecting plate 18 are provided on the main body side of the seedling take-out plate 90.
7, the split body 184 is foldably connected via the engagement body 188, the posture holding spring 189, and the like.

In the side bumper 74, the bumper bent vertical portion 74a is vertically movably inserted through a mounting member 75 fixed to both ends of the fulcrum shaft 67 and having a U-shape in a side view.
A compression spring 191 is provided between the spring seat 190 of the vertical portion 74a that projects further downward and the mounting member 75, and the position of the L-shaped position regulating plate 192 that regulates the position by contacting the outer end surface and the front surface of the mounting member 75. Is fixed to the vertical portion 74a,
At the contact position between the regulation plate 192 and the front surface of the attachment member 75, the bumper horizontal portion 74b is made to project in the extension direction of the fulcrum shaft 67 to protect the seedling extraction plate 90 and the like, while the bumper 74 is moved upward against the spring 191. To the rear of the horizontal portion 74b approximately 9
When the bumper is in the stowed position in which the regulation plate 192 and the outer end surface of the mounting member 75 are brought into contact with each other by rotating 0 degree, the width of the machine body is reduced so that the vehicle can be easily loaded or stowed. .

As shown in FIG. 38, left and right side bumpers 74
The end portion 74c of the horizontal portion 74b has a shape that is bent from the front to the rear so that the opened state of the bumper 74 can be easily confirmed from the position of the driver's seat 13 in the length direction of the end portion 74c to improve the visibility. It is configured to eliminate inconveniences such as being caught even if it hits an obstacle.

The side bumper 74 and the seedling take-out plate 9 are also provided.
When folding and storing the split body 184 of 0, the side bumper 74 is wrapped outside the split body 184 in a side view to prevent the split body 184 from opening outward by the end portion 74c of the side bumper 74, An accident such as the interference of the divided body 184 is prevented, and the bumper 74 protects the divided body 184 even when folded. Further, the left and right side bumpers 74 are prevented from being damaged by the upward movement against the spring 191 even when pushed up from below.

As shown in FIGS. 33 and 35, the grooving device 4 is used.
Two 0s are arranged on each of the left and right sides of the center float 34, and one is arranged on each of the left and right side floats 34. In the left and right side floats 34, the grooving tool mounting portion is provided on the inner base of the float outer rear extension 176. 193 is provided so that the space between the hose 41 connected to the grooving device 40 and the seedling mounting table 16 is reduced to achieve a good arrangement.

As shown in FIG. 19, the vertical frame 44a.
The hose mounting stay 194 is fixed above the front part of the b 44b, and the hose 41 near the upper part of the boot 40a of the groove making device 40 is fixedly supported by the clamp metal fitting 195 mounted on the stay 194, and the horizontal frame 45 and the seedling feeding shaft 58 are also provided.・ Seedling stand 16 and seedling amount adjustment shaft 96 behind the vertical feed cam 124
The hose 41 is passed in front of the hose 41 so that the bending of the hose 41 is suppressed to be small and clogging of the fertilizer is prevented.

Then, as shown in FIG. 37, the driven cam 1 is
25 and the hose 41 are arranged outside the lateral movement range of the slide receiver 123 to reduce the distance between the hose 41 and the seedling table 16, and as shown in FIG. 12, the gear pump 109, the motor 110, etc. of the rolling cylinder 106. Pass the hose 41 under the hydraulic unit to assemble the hose 41 that effectively secures the space of the hose 41.
As shown in FIGS. 5 and 6, the hose 41 is passed through the gap 100 between the seedling feeding case 59 and the seedling removal amount adjusting shaft 96 so that the hose 41 that does not require a separate hose attachment member can be held at a low cost and with good weight. I am configuring.

Further, as shown in FIG. 37, in the middle portion of the transfer hose 41, the left and right hose guides 196 are arranged on both the left and right sides of the hitch bracket 24, and the clamp fittings of the hose 41 are provided on both the left and right ends of the left and right hose guides 196. 19
7 is attached and the hose 41 and the hitch bracket 24 are wrapped in a side view, so that the distance between the machine and the seedling table 16 is shortened to reduce the overall length of the machine.

[0058]

As is apparent from the above embodiments, the center float 34 and the side float 3 are provided below the planting portion 15.
In the rice transplanter equipped with No. 5, the side float 35 is formed in a gantry shape in plan view, and the front-rear length of the rear rear extension portion 176 is shorter than the front-rear length of the rear rear extension portion 175. The lateral width W1 of the inner rearward extending portion 175 is formed to be substantially the same as the lateral width W3 of the wheel 8 or wide W1 ≧ W3, and the lateral width W of the float outer rearward extending portion 176 is set.
Since 2 is formed to have a width W1> W2 narrower than the left-right width W1 of the float inner rear extension portion 175, it is possible to perform a good round planting with a small influence of the side float 35 on the already planted seedlings, The planting work for surely erasing the marks of the wheels 8 can be performed while the mud pushing on the adjacent seedlings is suppressed to a minimum, and the planting accuracy can be stably maintained.

Further, the side float 3 corresponding to the wheel 8
Since the front surface position of No. 5 is formed in the recess 177,
The gap between the wheel 8 and the side float 35 is secured to facilitate the reduction of the entire length of the airframe, and the flow M of water is made to flow not to the adjacent seedling but to the trace of the wheel 8 to reduce the influence on the adjacent seedling. The leveling property can be improved.

[Brief description of drawings]

FIG. 1 is an overall side view of a rice transplanter.

FIG. 2 is an overall plan view of the rice transplanter.

FIG. 3 is a side view of a planting part.

FIG. 4 is an explanatory side view of a planting part.

FIG. 5 is a plan view of a planting part.

FIG. 6 is an explanatory plan view of a planting part.

FIG. 7 is an explanatory side view of the planting section.

FIG. 8 is a side view of a lifting link mechanism.

FIG. 9 is a plan view of a lifting link mechanism.

FIG. 10 is an explanatory cross-sectional view of the planted frame portion.

FIG. 11 is a front explanatory view of a seedling mounting table.

FIG. 12 is a front explanatory view of a hitch bracket portion.

FIG. 13 is a side view of the seedling feeding case portion.

FIG. 14 is a rear view of the side marker portion.

FIG. 15 is an explanatory plan view of a side marker portion.

FIG. 16 is a perspective explanatory view of a side marker portion.

FIG. 17 is a side view illustrating a bearing plate portion.

FIG. 18 is an explanatory plan view of a seedling removal amount adjusting shaft portion.

FIG. 19 is a side view of the vertical seedling feeding section.

FIG. 20 is a rear view for explaining the seedling table.

FIG. 21 is a side view illustrating a driven cam portion.

FIG. 22 is a side view of the vegetation depth adjusting section.

FIG. 23 is a plan view of a planting depth adjusting section.

FIG. 24 is an explanatory diagram of a vegetation depth motor section.

FIG. 25 is an explanatory diagram of a planting depth adjusting plate.

FIG. 26 is an explanatory diagram of a switch unit.

FIG. 27 is a side view of the seedling take-out plate portion.

FIG. 28 is a perspective explanatory view of a receiving blade portion.

FIG. 29 is an inner side view of the seedling feeding case portion.

FIG. 30 is a side view illustrating a side bumper portion.

FIG. 31 is an explanatory diagram of a side float pivotal support portion.

FIG. 32 is an explanatory view of folding the seedling take-out plate.

FIG. 33 is a plan view of the float portion.

FIG. 34 is an explanatory plan view of the float.

FIG. 35 is an explanatory plan view of a side float portion.

FIG. 36 is an explanatory bottom view of the side float.

FIG. 37 is an explanatory diagram of a transfer hose section.

FIG. 38 is an explanatory view of folding the side bumper and the seedling take-out plate divided body.

FIG. 39 is an explanatory view of a conventional structure of a side float.

[Explanation of symbols]

8 rear wheels 15 Planting Department 34 Center Float 35 side float 175 Inner rear extension 176 Outside rear extension 177 recess W1 Left and right width of the inner rear extension W2 Left and right width of the outer rear extension W3 rear wheel left and right width

Claims (2)

[Claims] 1. In a rice transplanter equipped with a center float and a side float below a planting part, the side float is formed in a gantry shape in a plan view, and the front and rear parts of a rear extension part outside the inner rear extension part are formed. The length is shortened, and the left and right width of the float inner rear extension part behind the wheel position is formed to be substantially the same as or wider than the wheel left and right width, and the left and right width of the float outer rear extension part of the float inner rear extension part is formed. A rice transplanter characterized by being formed narrower than the left and right width. 2. The rice transplanter according to claim 1, wherein the front surface of the side float corresponding to the wheel is formed in a recess.