JP3433488B2 - Elevation control device of seedling transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTIONLiftingOperable installation
The present invention relates to a raising and lowering control device of a seedling transplanter to be used. [0002] 2. Description of the Related Art Conventionally, Japanese Patent Application Laid-Open No. 63-102605 is known.
The seedling transplanter is moved up and down to determine the height relative to the topsoil surface.
Elevation control device that controls to maintain at the height of
Wherein the seedling transplanter is configured for even-numbered planting.
And a plurality of floats attached to the seedling transplanter.
Are connected so that they can move up and down at the same time, and all the floats
A float for detecting the height of the seedling transplanter with respect to the topsoil surface,
In addition, all the floats are supported at the same position in the front and rear.
An apparatus for raising and lowering a seedling transplanter is disclosed. But,
The three floats used here are on the left and right sides.
The shape of the rotor and the shape of the center float are different.
there were. [0003] In the prior art,All at once
The vertical movement range of a plurality of floats that move up and down is regulated.
The floats move up and down more than necessary.
However, the planting depth of the seedlings may be unstable. Also,
A means is provided for adjusting the control sensitivity of the raising and lowering control of the seedling transplanter. Shimmer
Control of raising and lowering of the seedling transplanter
May not be able to. [0004] [MEANS FOR SOLVING THE PROBLEMS]
In addition, the present inventionMultiple floats on the seedling transplanter left and right
Is provided rotatably around the axis ofMultiple floatsSaid left
Move the right axis up and downMove up and down at oncePlanting depth control
Knot lever provided,The planting depth lever can be moved at any operation position.
Engageable lever guide can be moved only within a specified range
To move the seedling transplanter up and down due to the movement of the lever guide
To maintain the height relative to the topsoil at the specified height.
ControlConstitutionAnd restrict the movement of the lever guide.
Sensitivity adjustment means to change the control sensitivity of the elevation control.
KeCharacterized bySeedling transplanterLifting control device. [0005] Actions and effects of the present inventionthat's allAsWith a simple configuration
Operation of the planting depth adjustment lever with respect to the lever guide
To move several floats up and down at the same time
Can be adjusted and due to the movement of the lever guide
Set the seedling transplanter so that the height with respect to the topsoil surface is the specified height.
You can go up and down. Then, set the lever guide only within the specified range.
Because it is movable, multiple floats can be
Prevent downward movement and stabilize the planting depth of seedlings
Can be. Moreover, the movement of the lever guide is regulated,
Adjust the control sensitivity by properly changing the
Can control the raising and lowering of the seedling transplanter properly and stably.
Can do. [0006] An embodiment of the present invention will be described with reference to the drawings.
You. The riding rice transplanter 1 moves up and down to the rear side of the traveling vehicle body 2
Seedling transplanter 4 is mounted via lifting link device 3
Have been. Also, a fertilizer device 5 is provided on the rear side of the traveling vehicle body 2.
It is arranged. The traveling vehicle body 2 includes a pair of left and right steering driving circuits.
A front wheel 6.6 that rotates and a pair of left and right driving wheels 711 that rotate
It has. Mission 8 is located on the front side.
Front axle frame 9 from the left and right sides of mission 8
9 is fixed, and the front wheel frame is attached to both ends of the frame 9.9.
The final cases 10 and 10 are connected to each other,
Front wheel axle that protrudes outward from the bottom side
Is attached. The power in Mission 8 is the front wheels
Axle frame 9.9, front wheel final case 10.
The transmission is transmitted by the transmission mechanism in the front wheel 10 so that the front wheels 6
Turn over. In addition, a frame 11
The front end of 11 is fixed. After frame 11 ・ 11
The end is fixed to the lateral frame 12 and the lateral frame 12
The front and rear center parts of the rear wheel frame 13 on the center bearing
Rear wheel rolling shaft 13a fixed horizontally with its axis centered
Mated. Rear wheel gears on the left and right ends of the rear wheel frame 13
The casings 14 and 14 are fixed, and then the wheel gear casing 14 is fixed.
・ Rear wheels 7.7
Is attached. Therefore, mission 8 and frame
Body frame composed of a frame 11 and a lateral frame 12
Rear frame with the rear wheels 7, 7 attached to the
Can roll around the rear wheel rolling shaft 13a.
It has become so. Power in mission 8 is on the rear side
Rear wheel transmission shaft 1 from the left and right rear wheel gear cases 14
4a, 14a, and the rear wheels 7, 7 are driven and rotated.
You. Further, the power input to the mission 8 is performed by the frame 11
.The first belt transmission from the engine E supported on 11
15 (15a: engine side pulley, 15a ': engine
Output shaft, 15b: hydraulic pump side pulley, 15b ':
Transmission with hydraulic pump drive shaft, 15c: transmission belt)
8, once transmitted to the hydraulic pump P fixed on it, from there
A continuously variable transmission-type second belt transmission on the input shaft of the transmission 8
16 (16a: hydraulic pump side split pulley, 16b:
Session side pulley, 16b ': mission input shaft,
16c: Transmission belt. Both pulleys 16a and 16b are
The pulley width is adjusted reciprocally by the speed change lever 27.
Swelling. ) With high speed and low speed stepless transmission
It is. The transmission to the seedling transplanter 4 and the fertilizer application device 5
Planting fertilizer protruding backward from the right side of section 8
A first transmission shaft 25 is connected to the drive shaft 24, and
Planting fertilizer crane attached to the base frame 31
It is connected to the input shaft of the case 26. And the crack
The clutch for interrupting the transmission to the seedling transplanter 4 in the ticket 26
And projecting from the rear side of the clutch case 26 through
Of the seedling transplanter 4 from the attached drive shaft via the planting transmission shaft 27
The power is transmitted to the transmission case 40, and the clutch case 2
6 through the fertilizer application clutch which interrupts the transmission to the fertilizer device 5 in
Fertilizer drive projecting to the rear side of the clutch case 26
Transmission from the shaft to the fertilizer application device 5 via a crank rod or the like
You. The alternator attached to the engine E
-The third belt is transmitted from the second output shaft of the engine E to the
The electricity transmitted by the device 17 and generated there is
Mower of blower 53 that generates compressed air for transporting fertilizer in fertilizer device 5
The blower is electrically connected to the motor M.
The front wheels 6, 6 are steered to the front of the traveling vehicle body 2.
Handle 18 is provided to cover the upper side of the engine E.
The seat 20 is mounted on the engine cover 19
You. In addition, the lower part around the seat 20 and the handle 18 is
Step floor 21 is provided horizontally and is located on the left
The pilot or pilot on both sides from the front end to the rear
Other workers can move freely, and the right side
It can move freely between the left side. Riding the aircraft
Elevating steps 22, 22 fixed on the left and right sides of the aircraft
Not only from the front, but also on the floor 21
You can get on and off. Further, the lower side of the handle 18 is
Each post cover 23 is covered with a bar 23.
A display panel unit for displaying a seed operation state is provided.
The display panel and its surroundings are
Transmission lever and rear wheel differential lock lever, auxiliary transmission lever on right side
-, An accelerator lever is provided. In addition, post cover
The operator steps on the lower rear side of the -23
A pedal is provided, a clutch pedal on the left side, and a right side on the right side.
A rear wheel side clutch and brake pedal are provided.
A front wheel differential lock pedal is provided on the front floor of the seat 20.
Have been killed. Also, left and right front axle frames 9.9
To the support frames 55a and 55a fixed on the upper part of the
A preliminary seedling loading table 55 ... 55 ...
Installed. The lifting link device 3 is composed of frames 11
Pivotally attached to the link base 31 fixed to the rear side of the
It has an upper link 32 and lower links 33
The vertical link 34 is connected to the rear end of these vertical links.
Have been. Then, it projects rearward from the lower end of the vertical link 34.
It is fixed to the central transmission case 40a of the seedling transplanter
The connecting shaft 40a is rotatably connected to the seedling transplanter 4
It is mounted so that it can be rolled left and right with respect to the traveling direction.
You. In addition, the vertical link 34 and the seedling table 41 of the seedling transplanter 4 are supported.
Spring 38.3 between the frames 72
8 is provided, and when the seedling transplanter 4 rolls,
The springs 38, 38 move in the direction to return to the horizontal state.
Energize. In addition, the seedling that moves reciprocally and horizontally with the vertical link 34
Springs 39 are provided between the table 41 and the table 41.
The seedling table 41 is reciprocated sideways so that the weight of the seedling transplanter 4 becomes heavy.
The center position moves right and left and tries to move rolling.
Left and right horizontal state is maintained by springs 39
It is. Therefore, the seedling transplanter 4 does not touch the float.
When raised to the state, the springs 38, 38;
The parallel posture with respect to the traveling vehicle body 2
Become. Also, lower the seedling transplanter 4 so that the float is in contact with the ground.
When the seedling transplanter 4 is lowered,
When tilting to the right, float 4 in contact with the ground
5 receives the reaction force from the topsoil surface, and the spring 38.3
8: The seedling transplanter 4 faces the topsoil surface against the bias of 39.39.
Rolling movement around the connecting shaft 40a so as to be in a parallel state
I do. The lifting link device 3 is provided with a hydraulic series.
It is provided so as to be moved up and down by a cylinder 35. oil
The base side of the cylinder portion of the pressure cylinder 35 is below the engine E.
To support the supporting member fixed to the frame 11
The tip end side of the ton portion is integrally downward with the base of the upper link 31
A spring 3 is attached to the tip of the swing arm 32a extending
6 are connected. Hydraulic cylinder 35 piston
When the part operates to protrude from the cylinder part, the lifting link device 3
The ascending operation is performed, and the seedling transplanter 4 is ascended. Hydraulic cylinder 35
Ascends and descends when the piston part of the piston retracts into the cylinder part
The link device 3 operates to descend, and the seedling transplanter 4 descends. oil
The operation of the pressure cylinder 35 is switched by the hydraulic valve 37
available. The seedling transplanter 4 has a six-row planting configuration. Ma
Central transmission case 40a and transmission frames 40b.4
0b / 40b and the connecting frames 40c / 40c.
Transplant transmission frame 40 constructed in an E-shape when viewed from above
Each of the seedling transplanters 4 is placed inside the
It is provided with a transmission mechanism to the operating part. The transplant drive
Seedlings are tilted above the frame 40 so that the front side is higher.
A mounting table 41 is provided, and the center transmission case 40a moves left and right.
Connected to the moving rod 41DS which reciprocates left and right by the backward movement mechanism
And reciprocate left and right. Also transmission
Each of the frames 40b, 40b, 40b
An outgrowth drive shaft is provided with an ingrowth device 42. Yo
Then, the seedling table 41 reciprocates left and right to remove the seedlings on the seed table.
Sequentially to the seedling removal exit of the seedling receiving frame 41a provided at the lower end of the seedling mounting table
And the implanting tools 43 of the implanting devices 42 follow a predetermined trajectory.
Rotate while drawing to plant seedlings supplied to the seedling outlet
The planting claws of the tool 43 ... hold the seedlings and reach the field.
When you release and plant. Also,
A belt-type vertical seedling feeder on the lower side of each seedling mounting surface of the seedling mounting table 21
A device 44 is provided, and the seedling table 41 is moved in the left-right direction.
To move the planting device 42 under the seedling mounted on the seedling mounting surface.
After transplanting the end part for one row, the lower end to be transplanted next
Transfer the seedling so that the part is located above the seedling opening. Also before
On the lower side of the transmission frames 40b, 40b, 40b,
Floats 45, 45, 45 on the center and left and right, respectively
It is attached so as to be rotatable around the axis. Each float 4
5.45.45 is to smooth the mud surface of the field during seedling transplantation.
While running and leveling, the seedling transplanter 4
Detect the fluctuation of the height. In addition, each float 45, 45.4
At the bottom of No. 5, fertilizer is applied to the position near the left and right of the seedling planting position of each line.
Tool 46 to form a groove for fertilizer and a fertilizer guide on the rear side
The parts 47 are attached. The fertilizer applicator 5 applies fertilizer to each planting position near the left and right.
First, a hopper that stores fertilizer
Feeding device 5 attached to the lower side of 50 and its hopper
, The vehicle body traveling in front of the seedling transplanter 4 in the front-rear direction
2 behind the seat 20 and the same number of fertilizer
Feeding device 51 ... (here, six feedings corresponding to six-row planting)
Output devices are provided).
You. And the fed fertilizer is fed to the fertilizer application guide 47 ...
Leading fertilizer hoses 52 are placed at the bottom of each feeding device 51.
Connect each one. Fertilizer in fertilizer hose 52 ...
Blown into the air chamber 54 by the lower 53
The compressed air is applied from the upstream of the fertilizing hoses 52 in each section.
The fertilizer is forcibly blown into
To be transported. Now, as described above, the float 45.4 is used.
5.45, slide the topsoil of the field during the seedling transplantation work
At the same time, the height of the seedling transplanter 4 with respect to the topsoil surface is changed.
Detect motion. And this float 45
Of the seedling transplanter 4 at a predetermined height with respect to the topsoil surface
Up and down link device 3 moves up and down to maintain
The machine 4 is controlled to move up and down. This seedling transplanter
The specific configuration of the lifting control device of No. 4 is as follows.
(See FIGS. 5 to 8). First, the support structure of the floats 45
The float support pipe 6 in the left and right direction of the axis is composed of one piece.
Of the floating support arms 60a, 60a,.
At the rear end, the axis X is connected to the connecting pins 61 in the left-right direction.
Float support members 45a fixed to the upper surfaces of the floats
45a ... are rotatably connected, and each float is
Are supported so as to be rotatable around an axis X. The float
The support of the support pipe 60 is at the bottom of the implanted transmission frame 40.
In the support cylinders 62
Shaft 63 left rotatably supported via ring 63
Float support pipe on right support shaft 64
60 is connected to a fixed pipe support arm 60b.
And support. Also, the float support pipe 60
The lever connection member 65 having a U-shaped front and rear cross section is fixed,
The planting depth is provided in the holes provided above and below the lever connecting member 65.
The base of the adjusting lever 66 is rotatably fitted.
When the base of the lever is fitted, the torsion spring 6
7 is externally fitted and the spring 67
The adjusting lever 66 is a lever engaging press fixed to the lever.
-66a engages with the engaging grooves 68a of the lever guide 68.
To be rotated in the direction of rotation. Lever guide 68
Are formed at the corners formed in the lever guide 68.
A number of grooves are provided at predetermined intervals on the left side of the edge of the hole.
It is formed in a comb shape. Then, the planting depth adjusting lever 66 is engaged.
The lever guide 68 is a lever guide fixed to the seedling transplanter 4.
Slidable within a predetermined range with respect to the support frame 69.
It is attached. Thereby, the planting depth adjustment lever 66
Is engaged with the lever guide engagement groove 68a.
Also within the sliding range of the lever guide 68.
Attaching depth adjustment lever 66 around support shafts 64, 64, 64
It is rotatable and flows within the range of rotation of the lever.
４５45 ト 45 move vertically. Les
First, the slidable support structure of the bar guide 68
Upper side of the bar guide support frame 69 where the square holes 69a are formed
A lever guide 68 is placed on the left and right pins 70.
It is connected by 70. Lever through which pins 70 and 70 pass
-Since the hole of the guide 68 is a long hole 68b,
The long guide 68 is provided within the range.
The support frame 69 can be slid. Soshi
And a valve case is provided on the right side of the lever guide support frame 69.
The attachment pin 69b is projected and fixed, and the lever guide 68
Project the valve spool mounting pin 68c to the right side of the
To the valve case mounting pin 69b.
Attach the valve case 37a of the valve 37, and
-The valve sprue of the hydraulic valve 37 is attached to the
Then, the hydraulic valve 37 is attached. The lever guide support frame 69 supports
Guide support frame mounting bracket 71 fixed to pipe 71
a.71a. The support pipe 71
It is a single horizontal body, and its central part is fixed to the transmission case 40a.
The left and right ends are supported by the
Bracket 7 fixed to frames 72 supporting frame 2
It is supported and fixed by 2a and 72a. Further, a valve spool mounting pin 68c is provided.
One end of inner wire 73a of sensitivity adjustment wire 73
And a sensitivity adjusting spring 74. Sensitivity adjustment
The outer 73b of the knot wire 73 is supported by a lever guide.
Wire mounting integrally formed on the front side of the right side of the frame 69
It is attached and fixed to the portion 69c. This sensitivity adjustment split
The pulling force of the ring 74 is
Floats 45, 45 are added to the ground pressure at the time of grounding.
・ Resistance at the time of upward movement of 45. Also, the sensitivity adjustment wire
The other end of -73 is a sensitivity adjustment provided on the traveling vehicle body 2 side.
Connected to the lever 75, and the sensitivity adjusting lever 75 is pivotally operated.
Change the tension of the sensitivity adjustment spring 74
Can be Tension force of sensitivity adjustment spring 74
Can be changed greatly when float 45
Of the sensitivity adjusting spring 74 is increased.
If the tension is changed to a small value, the float 45
Resistance during upward movement is reduced. Therefore, ground on the topsoil surface
Seedling moved by vertical movement of sliding floats 45, 45, 45
The height of the planting machine 4 with respect to the topsoil surface is detected, and the seedling transplanting machine 4 is raised.
In the case of descending control, depending on the hard and soft state of the topsoil surface, etc.
Sensitive height detection on topsoil surface by the float
When adjusting the float, adjust it to reduce the dynamic resistance,
When making it insensitive, increase the floating dynamic resistance
Can be adjusted. Also, the hydraulic bar attached as described above
Three hydraulic hoses are connected to the lube 37. That
First, three hydraulic hoses are supplied from a hydraulic pump P to a hydraulic valve.
Hose H connecting oil passage R1 to pump port of valve 37
1. Further, a hydraulic system is provided from the cylinder port of the hydraulic valve 37.
Hose connecting the oil passage R2 into the cylinder of the cylinder 35
H2 and oil from the tank port of the hydraulic valve 37
The hose H3 connects the oil passage R3 to the oil tank T.
The hydraulic valve 37 communicates the oil passage R1 with the oil passage R3.
State and pressurized oil from hydraulic pump P to oil tank T
Return "neutral" state, and oil path R1 and oil path R2 are in communication.
To send hydraulic oil from hydraulic pump P to hydraulic cylinder 35
"Lift operation" state in which the lifting link device 3 is raised.
And the oil passage R1 and the oil passage R2 communicate with the oil passage R3.
Along with the hydraulic oil from the hydraulic pump P, the hydraulic cylinder 35
The oil is returned to the oil tank T and the lifting link device 3 is lowered.
It is provided so that it can be switched to the "down operation" state to operate
I have. Also, an oil passage from the hydraulic pump P to the hydraulic valve 37
From the oil pump T
And a relief valve RV is provided in the oil passage.
It is interposed. In addition, the valve sp
One end of the lever 37b is connected to the lifting operation lever L1.
The other end of the wire -W1 is connected. ThatWireW
The other end of 1 is connected to the valve spool 37b by a long hole.
It is flexibly connected by a portion F. Lifting lever
When L1 is moved to the “down” position, the lever guide 68
Long hole 68b: Above float 45, 45, 45 within the range
The downward movement causes the hydraulic valve 37 to “neutral” and “
Operation "and" down operation ". Lifting operation
When the bar L1 is moved to the "up" position, the wire W1 is
The hydraulic valve 37 is forcibly pulled up
It switches to the "operating" state. "Fix" the lifting lever L1
When it is moved to the position, it is pulled
The joint F shifts and the hydraulic valve 37 is in the "down operation" state
It is regulated not to switch. As described above, the raising and lowering control device of the seedling transplanter 4
The seedling transplanter 4 operates as follows.
I do. First, in the field, to start rice transplanting
Then, the seedling transplanter 4 in the ascending state is lowered. At this time
Operates the lifting operation lever L1 to the "down" position. You
Then, it will be within the range of the long hole 68b of the lever guide 68.
The floats 45, 45, 45 move down by their own weight,
The hydraulic valve 37 is switched to the “down operation” state,
The link device 3 is moved downward. And float 45.4
5.45 touches the topsoil surface of the field and
Floats 45, 45, 45 move upward by force, and hydraulic valve
Switch 37 from the "down operation" state to the "neutral" state
Then, the lowering operation of the lifting link device 3 is stopped. Next, the seedling transplanter 4 is switched to the operating state, and
Start the transplantation run. While running, float 45
・ 45 lands on the topsoil surface. By the way, wheels 6
・ 6,7 ・ 7 sink below the topsoil surface and roll on the tillage
I have. This tillage has irregularities and wheels pass through the irregularities
When the aircraft moves up and down, the seedling transplanter 4
The vertical height will fluctuate. Also, the topsoil surface that passes
The top and bottom of the seedling transplanter 4 also
The vertical height will fluctuate. In this way,
If the height of the seedling transplanter 4 with respect to the topsoil surface fluctuates,
The roto 45, 45, 45 has a planting depth adjusting lever 66.
Within the range of rotation of the lever guide 68 within the sliding range
And move up and down. In addition, three floats 45
45 and 45 are supported by a common float support pipe 60
Is rotated around the support shafts 64, 64, 64.
When it moves up and down, it moves up and down as a unit. This
As a result, the height of the seedling transplanter 4 with respect to the topsoil surface fluctuates.
And the total of the ground loads of the three floats 45
When the total exceeds the specified range, floats 45
When it moves, the support shafts 64
Lever guide by the planting depth adjusting lever 66 which rotates
68 slides and hydraulic valve 37 is in "neutral" state
Is switched to the "up operation" state or the "down operation" state.
You. The vertical height of the seedling transplanter 4 is a predetermined height with respect to the topsoil surface.
If it is higher than that, float 45
45 moves down and the hydraulic valve 37 switches to the "down operation" state
Wrong. And when the seedling transplanter 4 descends to a predetermined height,
Both floats 45, 45, 45 return to the original vertical position
The hydraulic valve 37 returns to the “neutral” state and
Stop. Conversely, the vertical height of the seedling transplanter 4 is
If the height drops below the specified height,
45.45.45 is pushed up from the topsoil surface and moves up and oil
The pressure valve 37 switches to the "up operation" state. And
The seedling transplanter 4 rises to a predetermined height and floats.
45, 45, 45 return to the original vertical position, and the hydraulic valve 3
7 returns to the "neutral" state and the ascent operation stops. More than
Since the lift control device is configured as described above, the float 45.4
5.45 slid on the topsoil surface and leveled, and seedling transplanter
4 moves up and down with the height change relative to the topsoil surface.
The seedling transplanter 4 moves to the topsoil surface by the vertical movement of the float.
The elevating link device 3 moves up and down so as to maintain a predetermined height.
Then, the raising and lowering of the seedling transplanter 4 is controlled. The planting depth adjusting lever 66 is turned to the right.
By operating the lever engagement plate 66a to the engagement groove 68a
When the lever 66 is disengaged and the lever 66 is turned up and down,
-The support pipe 60 is moved around the support shafts 64, 64, 64.
It pivots physically and with it the float support arm 60a
・ 60a ... rotates and floats 45 ・ 45 ・ 45 move up and down
Move. Therefore, the upper and lower positions of the floats 45, 45, 45
Since the seedling transplanter 4 is controlled to move up and down based on the standard,
Engagement of the lever adjusting lever 66 with the lever guide engaging grooves 68a.
The topsoil of the seedling transplanter 4 can be changed simply by changing the joint position up and down.
The reference position of the vertical height with respect to the surface can be changed,
2. You can change the vertical height of the topsoil with respect to the topsoil surface.
The seedling planting depth can be changed. The raising and lowering control device of the seedling transplanter 4 has a shaft center.
X is a flow supported by connecting pins 61 in the horizontal direction.
The vertical movement of the support
Therefore, even if the body leans back and forth, the float 45.45.4
5 can maintain a parallel state on the topsoil surface.
After the float, the float tilts with the forward and backward tilt of the aircraft.
It is said that the terrain is disturbed by floating or sinking edges
Elevation of the seedling transplanter 4 with good leveling
Control becomes possible. In addition, float 45
Elevation control so that the grounding load is maintained within the specified range
It has a float mark on the topsoil because
There is no breakage, and the float does not push too much
As a result, it is possible to control the raising and lowering of the seedling transplanter 4 with good leveling properties
You. In addition, the total load of all the floats 45
The lifting and lowering control is performed so that the
So that there is no
Less lifting and lowering, accurate and good leveling
The raising and lowering control of the seedling transplanter 4 becomes possible. In this elevation control device, a plurality of flow
-Height detection for the surface 45, 45, 45
For even-numbered-row rice transplanters
Supports all floats at the same position in the front and rear,
They can be composed of floats having the same shape. For example, 6-plant
Enono rice transplanter has the same shape to level the planting position for two rows
And three floats 45, 45, 45 are provided.
(Fig. 6), and leveling the planting position for three rows
A configuration in which two floats 48 of the same shape are provided
(Figure 9). Also, with a four-row rice transplanter,
Two floats of the same shape for leveling the planting position for two rows
In the case of an eight-row rice transplanter, the planting position for two rows is leveled.
To provide four identically shaped floats.so
Wear. As described above, if this elevation control device is provided,
All of the provided floats 45, 45, 45 have the same shape.
Cost can be reduced because it can be configured with a rotor.
Leveling of each float becomes uniform. Note that FIG. 6 and FIG.
The reference symbol PP indicates a seedling planting position by the planting device 42.
In front of the connecting pins 61 which rotatably support the float.
It is provided to be substantially the same position as the rear position. The structure of the raising and lowering control device of the seedling transplanter 4 is described above.
Alternatively, the configuration shown in FIG. 10 may be used.
You. That is, part or all of the planting depth adjustment lever 80 is
It is composed of a flexible spring material 81. Float 45.4
5 and 45 are mounting members 4 fixed to the upper surface of the float.
Are rotatably mounted on the float support shaft 82.
An integral fixing to the float support pipe 83 attached
The axis X is at the rear end of the support arm 84.
The shafts 85 ... are rotatably connected. Float support pipe 8
3. The base of the planting depth adjusting lever 80 can be integrally rotated.
And it connects so that it can swing left and right. Planting depth adjustment lever 80
In the vicinity of the front end of the lever, a lever guide 8 whose locking position can be changed is provided.
6 is provided. And the spring material of the planting depth adjusting lever 80
81 is a valve spool 37'b of the hydraulic valve 37 '.
And the valve case 37'a is a planting depth adjusting lever.
80 near base and planting depth adjustment lever 80 lever guy
It is supported in the vicinity of the locking portion to the door 86. Float in the field
The seedling transplanter 4 is in contact with the topsoil
When the vertical height changes, the planting depth adjustment lever 80
Float 45 'while increasing or decreasing the bending of the spring material 81 part.
46 'and 47' move up and down. Deflection of 81 parts of spring material changed
Even if it moves, the valve case 37'a is almost stationary.
The valve spool 37'b is held by the spring material 8
The seedling is pulled out or pushed in by a part of the deflection variation
The transplanter 4 is switched to a state in which it is moved up or down. Seedling
When the transplanter 4 moves up or down, the float
The seedling transplanter 4 is moved up and down, and the bending of the spring material 81 is also returned.
Lifting operation stops. Even with the above configuration,
The raising and lowering control of the seedling transplanter 4 can be performed in the same manner as described above.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a riding rice transplanter. FIG. 2 is a plan view of the riding rice transplanter. FIG. 3 is a plan view showing a transmission unit configuration and a frame configuration of the traveling vehicle body. FIG. 4 is a cross-sectional front view showing a connection support configuration of the seedling transplanter. FIG. 5 is a partial side view showing a configuration of a raising and lowering control device of the seedling transplanter. FIG. 6 is a partial plan view showing a configuration of a raising and lowering control device of the seedling transplanter. FIG. 7 is a perspective view showing a lever guide support configuration. FIG. 8 is a hydraulic circuit diagram showing a configuration of a hydraulic system of a lifting control device of the seedling transplanter. FIG. 9 is a partial plan view showing the configuration of another embodiment of the raising and lowering control device of the seedling transplanter. FIG. 10 is a simplified side view showing the configuration of another embodiment of the raising and lowering control device of the seedling transplanter. [Description of Code] 1: Riding rice transplanter 2: Riding vehicle body 3: Elevating link device 4: Seedling transplanter 35: Hydraulic cylinders 45, 45, 45 : Floats 61, 61 ...: Connecting pins 66: Planting depth Adjustment lever 68: Lever guide 68b ...: Slots 70, 70: Pin 75: Sensitivity adjustment lever

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Rihiki Seike, 1-Yakura, Tobe-cho, Iyo-gun, Ehime Prefecture, Iseki Agricultural Machinery Co., Ltd. Engineering Department Co., Ltd. (72) Inventor Hisashi Kamiya 1 Eighth Town, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. (72) Inventor Tateyuki Ouchi 1 Yakura, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. Technical Department (56) References JP-A-63-102605 (JP, A) U) (58) Field surveyed (Int. Cl. ⁷ , DB name) A01C 11/02 A01B 63/10

Claims (1)

(57) [Claims] [Claim 1] A plurality of floats are provided on a seedling transplanter in a lateral direction.
Provided around the axis rotatably, said plurality of flow - DOO the left and right
Adjusting the planting depth by moving the axis of the direction up and down simultaneously
A lever is provided , and the planting depth lever is engaged at an arbitrary operation position.
Lever guide that can be moved only within a predetermined range.
And raise / lower the seedling transplanter due to the movement of the lever guide
So that the height relative to the topsoil surface is maintained at the specified height.
In addition to the control structure , the movement of the lever guide is restricted.
A raising and lowering control device for a seedling transplanter, comprising a sensitivity adjusting means for changing the control sensitivity of the raising and lowering control.