JPH11113331A - Device for controlling lifting and lowering of transplanting part in rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for controlling lifting and lowering of a transplanting part and designed to improve an operability thereof in a rice transplanter having a transplanting part supported so as to be lifted and lowered to a machine body. SOLUTION: This device for controlling lifting and lowering of a transplanting part is constituted of a first operating tool 60 for carrying out both of the operation for controlling the upper and lower height of the transplanting part at a proper position in the upper and lower direction, and the operation for turning the transmission to a transplanting part into an on or off state, a second operating tool for carrying out both of the operation for lifting and lowering the transplanting part from an operating position to a not-operating position when the first operating tool 60 is positioned at a setting position in the operating range thereof, and the operation for turning the transmission to the transplanting part into the on or off state. The device is also constituted so that the on-off operation of a transplanting clutch for turning the transmission to a transplanting part into the on or off state may be carried out by the operation of an electric motor Mpc operated by the operation of the second operating tool, and the on-off operation of the transplanting clutch may be mechanically carried out by the operation of the first operating tool 60.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planting portion elevation control device for a rice transplanter in which a planting portion is supported on a machine body so as to be able to move up and down.

[0002]

2. Description of the Related Art Generally, in a conventional riding rice transplanter, an operating position of a lever for raising and lowering a planting portion is a "planting position" for maintaining the planting portion at a constant height from a top soil surface. "Up position" to raise the planting part, "lower position" to lower the planting part,
It consisted of four positions, a "fixed position" for fixing the planted portion at a fixed position. Therefore, when trying to raise or lower the planting part to an arbitrary position during non-working, operate the lever to the “up position” or “lower position” to move the planting part up and down, and when the timing is right, fix the lever `` fixed '' By operating the "position", the raising and lowering operation of the planting part was stopped.

[0003]

At the time of planting work in the field, the topsoil following control state is set with the lever at the "planting position". However, turning the body at the end of the field involves moving the planting unit from the working position to the non-working position and lowering the planting unit from the non-working position to the working position. When raising the planting part, move the lever from the “planting position” to the “raising position”.
When the planted part is lowered, the lever must be operated from the "up position" to the "planted position" .Therefore, the lever operation amount is large and the operability is poor. Since the operation must be performed with one hand, there is a problem that the maneuverability is deteriorated.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a planting section raising and lowering control device for a rice transplanter in which a planting section 4 is supported so as to be able to ascend and descend with respect to an airframe. A first operating tool 60 for performing an operation of vertically adjusting the vertical height of the portion 4 to an appropriate position and an operation of turning on and off the transmission to the planting portion 4.
And when the first operating tool 60 is positioned at a set position within the operation range, the operation of moving the planting section 4 up and down between the working position and the non-working position and transmission to the planting section 4 is switched on and off. A second operating tool 61 that can perform an operation to perform the on / off operation is provided. The on / off operation of the planting clutch 29 for performing on / off of transmission to the planting section 4 is performed by operating the electric motor MPc by operating the second operating tool 61. A planting section elevating control of a rice transplanter, wherein the planting clutch 29 is configured to be turned on and off, and the first operating tool 60 is operated so that the planting clutch 29 can be mechanically turned on and off. It is a device.

[0005]

Operation and effect of the planting part raising and lowering control device of the rice transplanter according to the present invention, when moving outside the paddy field, operate the first operating tool 60 to adjust the vertical height of the planting part 4 to an appropriate level. The position can be adjusted up and down, and when working in a paddy field, the first operating tool 6
0 is located at a set position within the operation range, and thereafter, the second operating tool 61 is used to set the planting section 4 at the time of turning the aircraft.
The operation of raising and lowering the working position and the non-working position and turning on and off the transmission to the planting section 4 can be easily operated, and the operability is high.

When the on / off operation of the planting clutch 29 by the second operating tool 61 becomes impossible due to a failure of the electric motor MPC for the on / off operation of the implanting clutch, the first operating tool 60 is mechanically operated by operating the first operating tool 60. The planting clutch 29 can be turned on and off, and rice planting work can be continued even if a failure of an electrical component occurs due to muddy water or the like in the paddy field.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, as one embodiment of the present invention,
The planting section elevation control device of the riding rice transplanter will be described. The riding rice transplanter 1 has a configuration in which a planting section 4 is mounted on the rear side of a traveling vehicle body 2 via a lifting link device 3 so as to be able to move up and down. In addition, a fertilizer tank 5a and a fertilizer feeding section 5b of a fertilizer device 5 for applying fertilizer in the vicinity of each planting streak are disposed at the rear of the traveling vehicle body 2 and in front of the planting section 4.

The traveling vehicle body 1 is a four-wheel drive vehicle, and includes a pair of left and right front wheels 6, 6 and rear wheels 7, 7, which are drive wheels. Front wheel axle cases 9 and 9 are fixedly provided on left and right side portions of a transmission case 8 arranged at the front of the body, and front wheel final cases 10 and 10 are fixedly provided on outer end portions of the front wheel axle case. , Front wheel axles 6a, 6 protruding outward from the lower portion of the front wheel final case.
The front wheels 6, 6 are attached to a. Mission case 8
The internal power is transmitted by a transmission mechanism in the front wheel axle cases 9, 9 and the front wheel final cases 10, 10, and the front wheels 6, 6 are driven to rotate.

The front ends of a pair of left and right main frames 11, 11 are fixed to the rear surface of the transmission case 8, and a horizontal frame 12 is fixed to the rear ends of the main frames 11, 11. And the horizontal frame 12
A rear wheel rolling shaft 13a whose axis is oriented horizontally in the front-rear direction is fixedly fitted to the left and right central portions of the vehicle, and the rear wheel frame 13 is supported by a protruding portion of the rear wheel rolling shaft so as to be freely rollable. Rear wheel gear cases 14, 14 are integrally provided at left and right end portions of the rear wheel frame 13, and rear wheel axles 7a, 7 projecting outward from an outer portion of the rear wheel gear case.
The rear wheels 7, 7 are attached to a. The power in the transmission case 8 is transmitted to the left and right rear wheel gear cases 14, 14 by rear wheel transmission shafts 14a, 14a, and the rear wheels 7, 7 are driven to rotate.

The engine 20 includes main frames 11, 11
It is mounted on. The rotational power of the engine 20 is transmitted from the engine output shaft 20a to a hydraulic forward / reverse continuously variable transmission (H
ST) The transmission power is transmitted to the input shaft 21a by the first belt transmission device 22 by the first belt transmission device 22, and the rotational power after shifting by the forward / reverse continuously variable transmission 21 is transmitted from the HST first output shaft 21b to the transmission input shaft 8a by the second belt transmission. While being transmitted by the transmission 23, the hydraulic pump 2
The transmission is transmitted by the third belt transmission 25 to the drive shafts 24a of the 4, 24 '. The rotational power of the engine 20 is also transmitted to the alternator 27 by the fourth belt transmission 26.

After the rotational power input to the transmission case 8 is shifted by the main transmission, the rotational power is divided into the driving system power and the planting section driving system power, and the front system includes the front wheel axles 6a, 6a and the rear wheel axle. 7a, 7a, and the planting unit 4 and the fertilizer application device 5 are driven by the planting unit drive system power. The planting section drive system is provided with a planting clutch 29 for turning on and off the transmission to the planting section.

The control seat 30 is installed on an engine cover 31 that covers the upper side of the engine 20. A steering handle 33 is provided above the front cover 32 in front of the steering seat 30. Also, the front cover 3
An operation panel, various operation levers, various operation pedals, and the like are provided around the control seat 2 and the control seat 30. The lower part of the engine cover 31 and the lower part of the front cover 32 form a horizontal floor step 37 on which the operator can walk. Further, on the side of the body, there are provided elevating steps 38, 38 for elevating to the floor steps 37.

The lifting link device 3 has a parallel link configuration, and includes one upper link 40 and a pair of left and right lower links 41,
41 are provided. These links 40, 41, 41
The base side is rotatably attached to a link base frame 42 erected at the rear end of the main frames 11, 11, and a vertical link 43 is connected to the front end thereof. The vertical link 43 is provided with a rolling shaft 43a for connecting the planting portion 4 in a freely rolling manner. A hydraulic cylinder 45 for elevating operation is interposed between a support member (not shown) fixed to the main frames 11 and 11 and a distal end portion of a swing arm 44 integrally formed with the upper link 40. The upper link 40
Pivots up and down, and the planting section 4 attached to the vertical link 43 moves up and down while maintaining a substantially constant posture. The hydraulic cylinder 45 is controlled by an electromagnetic control valve 57 described later.

The planting section 4 has a six-row planting structure.
A transmission case 50 also serving as a frame is provided with a seedling mounting table 51 on which six rows of seedlings are mounted, and six sets of planting devices 52 for planting the seedlings on the seedling mounting table in a field scene. .
In the lower part of the planting part 4, a center float 54
However, a pair of side floats 55, 55 are provided on both left and right sides thereof, with the front end side thereof being vertically movable. When each float is in contact with the mud surface, a part of the weight of the aircraft is received by the contact portion. When the aircraft advances while the floats are in contact with the ground, the floats glide while leveling the mud surface.

The fertilizer applicator 5 is provided with a fertilizer tank 5a for storing fertilizer and a fertilizer feeding section 5b for feeding the fertilizer in the fertilizer tank downward by a predetermined amount sequentially at a rear portion of the traveling vehicle body 1. Floats 54, 5 are fed through a flexible fertilizing hose 5c,.
5 and 55 attached to the fertilizer bodies 5d. On the front side of the fertilizer body 5d, there are provided groove forming tools 5e for forming fertilizer grooves near the side of the planting streak.

The hydraulic circuit of this rice transplanter is configured as shown in FIG. That is, the two hydraulic pumps 24, 24 '
Is provided, and the pressure oil sent from one hydraulic pump 24 is supplied to an electromagnetic control valve 57 for elevating and lowering the planting portion,
The pressure oil sent from the other hydraulic pump 24 ′ is supplied to the power steering torque generator 58 and also to the hydraulic forward / reverse continuously variable transmission 21.

When working in the paddy field, each float 54,
The planting portion 4 is lowered to a position where the planting contacts 55, 55 are brought into contact with the ground, and the planting clutch 29 is turned “on”. Also, when traveling on a road or turning the aircraft in a paddy field, the planting section 4 is raised to an appropriate height, and the planting clutch 29 is turned off. The raising / lowering operation of the planting section 4 and the on / off operation of the planting clutch 29 are performed by using both the mode switching lever 60 as the first operating tool and the planting section vertical / planting clutch switching lever 61 as the second operating tool. Manipulate.

The mode switching lever 60 is provided on the right side of the control seat 30 and has a lever guide 62 shown in FIG.
It is designed to be operated along. "Position mode" is a mode for raising and lowering the planting part when not working,
Within this operation range, the position control of the planting section 4 is performed in accordance with the operation position of the mode switching lever 60, and the planting clutch is turned off. The "operation mode during operation" is a mode for planting work in a paddy field. The operation is a topsoil follow-up control for maintaining the planting portion at a constant height relative to the topsoil surface, and the planting clutch is set to "on". . Further, in the “operation mode during operation”, it is possible to switch up / down of the planting portion and on / off of the planting clutch by operating the lever 61 of the planting portion up / down / planting clutch switching lever 61. The "operation mode at the time of abnormality" is a mode when an abnormality occurs in the electrical connection for switching the planting clutch, and the raising and lowering of the planting section is the same as the "operation mode at the time of operation". Enter.

"Operation mode during operation" of the lever guide 62
A concave portion 62a is formed at the position, and the mode switching lever 60 operated at the position is urged by a spring to engage with the concave portion 62a. Therefore, the mode switching lever 60 is stabilized at the “operation operation mode” position.
Further, the lever guide 62 may be formed in a crank shape as shown in FIG. Mode switching lever 6 by spring
0 is urged toward the “operation mode at the time of abnormality” operation portion side, and an obstacle 62 b that gives resistance to the movement of the mode switching lever 60 between the “operation mode at the time of operation” position and the “operation mode at the time of abnormality” position
The mode switching lever 60 can be accurately and stably operated to the "operational operation mode" position, and the mode is switched to the "abnormality operation mode" position where it is hardly operated except during abnormal times. Incorrect operation of the lever 60 is prevented.

Planting part up / down / planting clutch switching lever 61
Is provided in the vicinity of the handle 33 as shown in FIGS. 10 and 11, is turned up and down from the neutral position N by a finger operation, and automatically returns to the neutral position N when the finger is released. I have. When operated to the upper planting portion vertical switching position A, the planting portion vertical switch SW-UD switches,
When the planting part is in the up state, the planting part goes down, and when the planting part is in the down state, the planting part goes up. Further, when the operation is switched to the lower planting clutch switching position B, the planting clutch changeover switch SW-PC is switched, and the planting clutch is turned off.
In the state, the planting clutch is "ON", and when the planting clutch is in the "ON" state, the planting clutch is "OFF".

Next, the planting part elevation control device will be specifically described. FIG. 12 is a diagram showing the configuration. In addition, a control device (microcomputer) MC that controls the elevation of the planting section
Performs the rolling control of the planting part in addition to the planting part elevation control, and FIG. 12 shows both control systems collectively. A lever positioning cam 65 is attached to a support shaft 64 of the mode switching lever 60.
a cam roller 67 supported by a roller support arm 66
Is in contact. When the mode switching lever 60 is in the "position mode" and the "operation mode", the cam roller 67 comes into contact with the circumferential portion of the cam surface 65a.
The operation of the mode switching lever 60 is performed smoothly. However, when the mode switching lever 60 is in the “abnormal operation mode”,
The cam roller 67 fits into the concave portion of the cam surface 65a, and is positioned in a stable state. The operation position of the mode switching lever 60 is detected by the potentiometer PM1. Reference numeral 68 in the figure denotes a spring for urging the roller support arm 66 so as to press the cam roller 67 against the lever positioning cam 65.

The planting clutch cam 70 is mounted on the support shaft 64.
Is mounted, and a cam roller 72 supported by a roller support arm 71 comes into contact with a cam surface 70a of the cam. When the mode switching lever 60 is operated to the "position mode" or the "operation mode", the roller support arm 71 is pulled by the spring 73 to push the planting clutch pin 29a, and the planting clutch is "disengaged". When the mode switching lever 60 is operated to the "operation mode at abnormal time", the planting clutch cam 70 pushes down the cam roller 72, whereby the roller support arm 71 rotates to pull out the planting clutch pin 29a, and the planting clutch "enters". become.

The operation for turning on and off the planting clutch in the "operation operation mode" is performed by the electric motor MPC. Electric motor M
The wire 74 is stretched by the PC, and when the wire 74 is pulled, the roller support arm 71 is rotated and planted in the same manner as when the mode switching lever 60 is operated to the “operation mode at abnormal time”. The clutch “enters”. The on / off state of the planting clutch 29 is detected by the planting clutch on / off switch SW-C, which is turned ON / OFF by the roller support arm 71.

A link sensor 75 for detecting the angle of the upper link 40 is used as a detecting device for controlling the elevation of the planting section.
An angle-of-attack sensor 76 that detects the angle of attack of the center float 54, which is a grounded body that detects irregularities on the topsoil surface, and a planting portion lift detection switch SW-U that turns on when the planting portion 4 is at the upper limit of the range in which it can be raised and lowered. Is provided. The planting part elevation control is performed according to the procedure shown in FIG. That is, the mode switching lever 60
Is read by the potentiometer PM1, and when in the "position mode", position control is performed only when not in the safety state, and when in the "operation operation mode" or the "abnormal operation mode", the operation is not in the safety state. , And planting part up / down / planting clutch switching lever 6
The topsoil follow-up control is performed only when the planting portion up / down switch SW-UD is not ON. In the “operation mode during operation” or the “operation mode during abnormal operation”, when the planting portion up / down changeover switch SW-UD is ON, priority is given to the topsoil follow-up control, and when the planting portion is in the raised state, planting is performed. When the planting portion is lowered, the planting portion is raised to the maximum lift position at which the planting portion raising detection switch SW-U is turned on.

Here, the safety state refers to a state in which when the key switch SW-K is switched from OFF to ON, the vertical movement of the planting section is restricted. This safety state is released when the mode switching lever 60 is operated to the highest position of the position mode area in the "position mode", and is released when the operation mode is the "operation operation mode" or the "abnormal operation mode". When the planting portion up / down switching switch SW-UD is turned ON by the up / down / planting clutch switching lever 61, it is released.

For the position control, the value (target value) of the potentiometer PM1 of the mode switching lever 60,
The difference between the value (actually measured value) of the potentiometer PM2 of the link sensor 75 is calculated, and an output command is issued to the electromagnetic control valve 57 so that the difference falls within the dead zone, and the planting section 4 is moved up and down. Regarding the topsoil follow-up control, the target value of the angle of attack set by the angle of attack setter (not shown) and the angle of attack sensor 76
Of the potentiometer PM3 (actually measured value) is calculated, and the electromagnetic control valve 57 is adjusted so that the difference falls within the dead zone.
And the planting section 4 is moved up and down.

The planting section elevating control device has the above-described configuration. In actual operation, the mode switching lever 60 and the planting section up / down /
The planting clutch switching lever 61 is operated in the following manner.
Mainly, when moving outside the paddy field without performing the rice transplanting operation, the mode switching lever 60 is moved to the “position mode” region, and the vertical height of the planting section 4 is adjusted up and down to an appropriate position. The position of the planting section 4 changes vertically according to the operation position of the mode switching lever 61.

When a normal rice planting operation is performed, the mode is switched to the "operation mode during operation" by the mode switching lever 60, and the automatic up-and-down control by the topsoil follow-up control is performed. At the time of turning, the planting portion 4 is raised to the maximum lift position by the planting portion vertical / planting clutch switching lever 61 (the planting portion vertical switch SW
-UD is ON) and the planting clutch 29 is turned off.
(Set the planting clutch switch SW-PC to O
N). After the turning is completed, the planting section 4 is lowered to the working position by the planting section up / down / planting clutch switching lever 61 (the planting section up / down switching switch SW-UD is turned on), and the planting clutch 29 is turned on. (The planting clutch switch SW-PC is turned ON). Therefore, the operation mode is the “operation mode at the time of operation” from the time of entering the paddy field to the time of finishing the operation and exiting the paddy field, except for a special case, and there is no need to operate the mode switching lever 60. The raising and lowering of the planting portion during turning is performed by the finger-operated planting portion up / down / planting clutch switching lever 61, so that the operation is extremely easy.

As a special case of setting the "position mode" in the paddy field, there are the following cases. When the planting section 4 is adjusted to the ground contact state in the “position mode” and the planting section 4 is run with the planting section 4 fixed at that position, the planting can be performed while the topsoil is leveled. When escaping from the paddy field while planting to the edge of the field, the planting section 4 may be gradually raised with respect to the traveling vehicle body 2 in accordance with the forward and backward inclination of the body in the "position mode".

[0030] Electric motor M for switching off with planting clutch
Planting part up / down / planting clutch switching lever 61 due to PC failure etc.
When the on / off operation of the planting clutch 29 due to the above becomes impossible, the mode switching lever 60 is set to the “operation mode at abnormal time”, the planting clutch 29 is mechanically set to the “on” state, and the operation mode is changed to the “operation mode during operation”. Then, the planting clutch 29 is in the “disengaged” state. Although rice transplanters used in paddy fields are liable to be damaged by muddy water, etc., electrical components are likely to fail.By setting an `` abnormal operation mode '', rice transplanting can be performed even if such failures occur. You can continue.

When starting the rice transplanter, the key switch SW-
When K is turned on, the safety function is activated, and even if the operation position of the mode switching lever 60 is different from the actual planting portion position, the planting portion 4 does not move up and down and is safe. When the mode switching lever 60 is operated to the highest position in the position mode area, the safety function is released, and a position control state is established.

When the rice transplanter is stopped in the paddy field and the operation is interrupted, the operation mode is the "operation mode at the time of operation." The safety function is released only by turning on the planting portion up / down switch SW-UD with the attached clutch switching lever 61. Further, a planting portion up / down manual switch SW-UDM for manually driving the electromagnetic control valve 57 without using the control device MC is provided. Therefore, even if the control device MC does not operate for some reason, the planting section 4 can be moved up and down by manual operation.

In this embodiment, the planting portion up / down changeover switch SW-UD and the planting clutch changeover switch SW-PC
ON / OFF is operated by a common planting portion up / down / planting clutch switching lever 61, but both switches may be operated by separate levers, respectively, or as a button switch instead of a lever. Is also good. Next, a rolling control system will be described.

The planting portion 4 is supported so as to freely roll around a rolling shaft 43a, and a rolling arm 80 provided at the center in the left and right directions is connected to the seedling mounting frames 51a, 51a by springs 81, 81 so that the planting portion 4 is elastic. In the neutral position. A gear 80a is formed on the rolling arm 80, and a pinion 82 rotated by a rolling motor MR is engaged with the gear. Therefore, when the pinion 82 is rotated by the rolling motor MR, the rolling arm 80 is rotated, and the lateral inclination of the planting section 4 is adjusted. The angle of the rolling arm 80 is detected by a potentiometer PM4, and the horizontal inclination of the planting section 4 is determined by a horizontal sensor 83.
(FIG. 14).

On the other hand, the operation panel is provided with a tilt adjustment dial 85 for setting the target lateral inclination of the planting section and a manual switch 86 for manually adjusting the lateral inclination of the planting section (FIG. 15). . Normally, rolling automatic control is performed so as to be a horizontal inclination (normally horizontal) set by the inclination adjustment dial 85. The control method is to output to the rolling motor MR based on input signals from the horizontal sensor 83 and the tilt adjustment dial 85.

When planting is performed in a state where the planting section 4 is tilted left and right with respect to the traveling vehicle body 2 at the ridge or the like, the manual switch 86 is operated to set the planting section 4 to an arbitrary left and right inclination. When a manual switch is operated, the automatic rolling control is cut off, and the rolling is fixed at an arbitrary left and right inclination. Thereafter, when the planting portion 4 is brought into the maximum lift state by operating the planting portion up / down / planting clutch switching lever 61 or operating the mode switching lever 60 to the top of the position mode area, automatic rolling control is performed. Return.

Further, when an abnormality such as disconnection occurs in the rolling control sensor (horizontal sensor 83), the manual operation state is maintained. Therefore, even if the automatic rolling control becomes impossible due to the sensor abnormality. The operation can be continued by manual rolling adjustment. As a mechanism for detecting the inclination of the planting section, the vertical movement of the left and right side floats 55 and 55 is detected by potentiometers PM5-L and PM5-R, and the detection results of both are compared, as shown in FIG. By doing so, it may be configured to calculate the left-right inclination of the planting part.

Next, the HST control system will be described. The continuously variable transmission (HST) 21 is a front cover 32
Is operated by a traveling lever 90 provided on the right side of the vehicle. As shown in FIG. 18, the lever guide 91 has a crank shape, and the front side is a forward operation area F and the rear side is a reverse operation area B across the neutral position N. The operating position of the traveling lever 90 and the swash plate angle of the HST are detected by potentiometers PM6 and PM7, respectively.
The swash plate angle is changed.

The 〓 width of the lever guide 91 is slightly larger than the lever diameter, so that the travel lever 90 is operated from the forward operation area F to the neutral position N and from the reverse operation area B to the neutral position. The shift d occurs in the operation position of the traveling lever 90 when the operation is performed to N. Therefore, when the operation position is faithfully output to the electric cylinder 92, when the vehicle is operated from the forward operation region F to the neutral position N, the vehicle moves at a slow speed but reverses, and the vehicle is operated from the reverse operation region B to the neutral position N. In this case, the vehicle is moving forward at a slow speed. Therefore, in order to prevent this, the neutral position N is stored in the nonvolatile memory E2 PROM at the time of shipment, and the output is controlled so as not to be output within the range of the deviation.

Further, since the HST manual operation switch 93 for manually operating the forward / reverse continuously variable transmission 21 in the forward and backward directions is provided, even if the control device MC does not operate for some reason, the body is manually operated. Is possible. Such an electronically controlled rice transplanter is provided with a microcomputer checker 95 that can communicate with the control device MC. The microcomputer checker 95 is used to check whether a normal output signal is output from the control device MC. I do. H
When checking the ST control system, the output check can be performed only when the check switch 96 of the rice transplanter is ON, and the drive lever 90 is forcibly set to the neutral position regardless of the position of the drive lever 90 at the end of the output check. It is controlled to return to the position N (FIG. 20). As a result, at the time of stop, the traveling lever 90 is moved in the forward operation area F or the reverse operation area B.
To prevent the body from starting at the same time as the engine is started.

[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 configuration of a transmission unit of the traveling vehicle body.

FIG. 4 is a hydraulic circuit diagram.

FIG. 5 is a front view of a lever mechanism of a mode switching lever.

FIG. 6 is an S1-S1 plane in FIG. 5;

FIG. 7 is a plane S2-S2 in FIG. 5;

FIG. 8 is a diagram showing a first example of a lever guide of a mode switching lever.

FIG. 9 is a diagram illustrating a second example of a lever guide of the mode switching lever.

FIG. 10 is a front view of a planting portion vertical / planting clutch switching lever mounting portion.

FIG. 11 is a view showing a structure of a planting portion up / down / planting clutch switching lever.

FIG. 12 is a block diagram of a planting section elevation control device.

FIG. 13 is a flowchart of a planting section elevating control.

FIG. 14 is a diagram showing a configuration of a first example of a rolling control system.

FIG. 15 is a diagram showing a rolling control operation panel.

FIG. 16 is a diagram showing a configuration of a second example of the rolling control system.

FIG. 17 is a flowchart of rolling control.

FIG. 18 is a view showing a lever guide of a traveling lever.

FIG. 19 is a block diagram of an HST check.

FIG. 20 is a flowchart of an HST check.

[Explanation of symbols]

MC: control device 1: riding rice transplanter 2: traveling vehicle body 3: lifting link device 4: planting unit 45: hydraulic cylinder 57: electromagnetic control valve 60: mode switching lever (first operating tool) 61: planting unit up / down Planting clutch switching lever (second operating tool)

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Takahide Shiozaki 1 Esashi Agricultural Machinery Co., Ltd., Iseki Agricultural Machinery Co., Ltd., Iseki Agricultural Machinery Co., Ltd. In-house Engineering Dept. (72) Inventor, Hisashi Kamiya, 1-Yakura, Tobe-cho, Iyo-gun, Ehime Prefecture, Iseki Agricultural Machinery Co., Ltd. Inventor Takuya Okada 1 Toyo-cho, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. (72) Inventor: Mitsutaka Izumi 1-tower, Tobe-cho, Tobe-cho, Eyo Prefecture Iseki Agricultural Machinery Co., Ltd.

Claims (1)

[Claims] 1. A planting part elevation control device for a rice transplanter in which a planting part 4 is supported so as to be able to move up and down with respect to a body of the planting part.
Operation to adjust the vertical height of the plant to an appropriate position and the planting section 4
The first operating tool 60 for turning on and off the power transmission is provided, and when the first operating tool 60 is located at the set position within the operation range, the planting section 4 is moved to the working position and the non-working position. And a second operating tool 61 capable of performing an operation of moving up and down and an operation of turning on and off the transmission to the planting section 4.
The on / off operation of the planting clutch 29 for turning on / off the transmission to the electric motor M is performed by operating the second operating tool 61.
The rice transplanter is characterized in that the pc is actuated to perform the on / off operation of the planting clutch 29, and the first operating tool 60 is operated to mechanically perform the on / off operation of the planting clutch 29. Planting unit elevation control device.