JP2002101706A - Sulky rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately carry out an automatic selection and operation of line drawing markers in a sulky rice transplanter in which a seedling planting apparatus liftably connected to the rear part of a traveling machine body is equipped with a pair of right and left line drawing markers for forming a machine body traveling standard line of a next process so as to freely move markers backward and forward. SOLUTION: This sulky rice transplanter is equipped with an automatic lifting means for automatically lifting the seedling planting apparatus in linking to steering of front wheels 1 by a set angle or more and with an automatic marker means for automatically selecting a projection operation of the line drawing markers 91a and 91b at the opposite side in the front wheel steering direction in linking to steering of the front wheels 1 by a set angle or more and is made so that operations of the automatic lifting means and the automatic marker means are stopped based on based on the detected result of clutch disengaging operation of any of levee-side clutch levers 74.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling planting apparatus having a plurality of planting specifications, which is connected to a rear portion of a traveling body so as to be movable up and down.
Equipped with a pair of left and right delineation markers that form the aircraft reference line for the next step on the rice field, which can be moved back and forth. The present invention relates to a riding rice transplanter configured to be able to select a drawing marker that protrudes and operates in an operating posture in conjunction with lowering of a device.

[0002]

2. Description of the Related Art Conventionally, as means for selecting a drawing marker to be protrudingly operated, a marker lock mechanism for holding left and right drawing markers retracted in conjunction with the raising of a seedling planting device in a storage position is provided. The lock of the marker lock mechanism can be individually released by the forward operation and the reverse operation of the lever arranged in
It is general that the lever and both marker lock mechanisms are mechanically or electrically linked. Further, there is also known an automatic marker means for automatically selecting a drawing marker to be operated next to be protruded alternately each time the seedling planting device is raised.

[0003]

The introduction of the above-mentioned auto marker means has the advantage that the marker selection operation by the lever becomes unnecessary and the operation at the time of turning the body at the ridge is simplified. On the contrary, a problem may occur depending on the use form.

For example, a marker selection operation is performed even when a line drawing marker is not used, such as when planting with a small number of lines in a process before a final planting process along a ridge. It is necessary to stop the operation of the auto marker means by another operation, which is troublesome. Also, forgetting to turn on / off the auto marker means and forgetting to return to the automatic marker means are likely to occur.

On the other hand, in the case of a model having a backup means in which the seedling planting device is automatically raised when the body is moved backward, the turning of the body at the ridge side includes a backward movement, that is, a so-called switchback, and a marker selection operation is performed. Is performed, and the correct selection order may go out of order.

Further, the conventional auto marker means is limited to an electric type which unlocks the marker lock mechanism electrically, and development of a mechanical type auto marker means is desired.

The present invention has been made in view of such a point, and a main object of the present invention is to enable an automatic selection operation of a drawing marker to be accurately performed.

[0008]

Means for Solving the Problems [Structure, operation and effect of the invention according to claim 1]

(Structure) According to a first aspect of the present invention, there is provided a seedling planting apparatus having a plurality of planting specifications connected to a rear portion of a traveling body so as to be movable up and down. The left and right drawing markers are both retracted into the storage position in conjunction with the raising of the seedling planting device, and the drawing markers that protrude to the action position in conjunction with the lowering of the seedling planting device are provided. In the rice transplanter configured to be selectable, the seedling planting device is equipped with a plurality of ridge-side clutches for suspending the planting operation of some of the planting streaks, and a plurality of ridges for separately operating these ridge-side clutches. Auto-up means for automatically raising the seedling planting device in conjunction with the front lever being steered to a set angle or more, provided with a clutch lever,
An automatic marker means for automatically selecting a drawing marker on the opposite side to the front wheel steering direction in association with the steering of the front wheel by more than the set angle, and automatically selecting the drawing marker on the side opposite to the front wheel steering direction; Is configured to stop the operation of the auto-up means and the auto-marker means based on the detection result of the clutch disengagement operation.

(Action) According to the above configuration, in a reciprocating planting operation, when the planting run of one stroke is completed and the body direction is changed at the ridge, the auto-up means is operated, and the seedling planting apparatus is operated. The ridge is raised automatically. In addition, when the front wheels are largely steered, the auto marker means is operated, and the drawing marker on the unplanted side is appropriately selected.

When planting with a small number of rows in the process before the final planting process along the ridge, the auto-up means and the auto marker means are activated by disengaging one of the ridge-side clutches. It will be stopped.

(Effects) Therefore, according to the first aspect of the present invention, when changing the direction of the airframe at the ridge, the raising operation of the seedling planting apparatus and the selection operation of the drawing marker become unnecessary.
Operation became simple. In addition, in the minority planting with the clutch on the ridge, the operation of the auto-up means and the auto-marker means is automatically stopped, so that there is no need to enter and operate the auto-up means and the auto-marker means. There is no need to forget the return operation after planting, and the handling and operability are excellent.

[Structure, operation and effect of the invention according to claim 2]

(Structure) According to a second aspect of the present invention, a pair of left and right lines for forming a body running reference line for the next process on a rice field surface is provided in a seedling planting apparatus having a plurality of planting specifications, which is connected to a rear portion of the running body so as to be movable up and down. The left and right drawing markers are both retracted into the storage position in conjunction with the raising of the seedling planting device, and the drawing markers that protrude to the action position in conjunction with the lowering of the seedling planting device are provided. In a rice transplanter configured to be selectable, the rice seedling planting device is provided with an automatic marker means for automatically selecting alternately a drawing marker to be protruded whenever the seedling planting device is raised, and the seedling planting device is automatically activated when the traveling body is operated in reverse. Backup means for automatically ascending, and a check is made so that the auto marker means does not function with respect to the ascent operation by the backup means. It is characterized by the following.

(Action) According to the above configuration, in the reciprocating planting operation, when the planting run of one stroke is completed and the body direction is changed at the ridge, the automatic operation is performed based on the raising operation of the seedling planting device. The marker means is operated, and the drawing markers to be protruded are automatically and alternately selected.
In addition, when the ship reverses when turning the aircraft around the ridge, the back-up means is activated and the seedling planting device automatically rises, and the rear end of the leveling float of the seedling planting device hits the ridge, or the rear end of the leveling float is The situation of rushing into and sneaking in is avoided. Then, the auto marker means does not function for the rising operation by the backup means, and the selection order of the drawing markers does not change.

(Effects) Therefore, according to the second aspect of the present invention, the operation of selecting the drawing marker is not required at the time of changing the body direction at the bank, so that the operation is simplified and the marker selection order is disturbed by the backup. Without this, an appropriate marker automatic selection can always be performed.

[Structure, operation and effect of the invention according to claim 3]

(Structure) The riding type rice transplanter according to the third aspect of the present invention is a multi-row seedling planting device connected to the rear of the traveling body so as to be able to move up and down. A pair of left and right drawing markers are provided to be able to move out and back, and both the left and right drawing markers are retracted to the storage position in conjunction with the raising of the seedling planting device, and project to the working position in conjunction with the lowering of the seedling planting device. In a riding rice transplanter configured to be able to select a drawing marker to be activated, a marker lock mechanism is provided for holding left and right drawing markers retracted in conjunction with the raising of the seedling planting device, respectively, in a storage position, and a lever arranged at hand The lever and the two marker lock mechanisms are connected via a linking member so that the locks of the marker lock mechanisms can be individually released by the forward operation and the reverse operation, respectively. A side clutch automatic operation mechanism is provided for mechanically interlocking and coupling the front wheel to be steered by more than a set angle, and disengaging the side clutch for the rear wheel inside the turning. The movable member provided in the front and rear directions is linked to a linking member linking the lever and the two marker lock mechanisms, and linked with the steering of the front wheel beyond the set angle, the front wheel steering is performed. The marker lock mechanism for the drawing marker on the opposite side to the direction is configured to be unlocked.

(Function) According to the above configuration, in the reciprocating planting operation, when the planting traveling of one stroke is completed and the body direction is changed at the ridge, the seedling planting device is raised to raise the double-drawing marker. Are retracted together and locked in the storage position. Then, in conjunction with steering the front wheel largely, the side clutch of the rear wheel inside the turning is automatically disengaged, and the small turning is executed. Further, in conjunction with the large steering of the front wheel, a drawing marker on the opposite side to the steering direction of the front wheel, that is, on the unplanted side is selected, and the lock in the stored posture is released.

In this case, the movable member of the side clutch automatic operation mechanism does not directly unlock the marker lock mechanism but performs the unlock operation using a mechanical manual operation system for marker selection. Become.

(Effect) Therefore, according to the third aspect of the present invention, the auto marker means can be constituted by a mechanical structure which is excellent in durability and can be manufactured relatively inexpensively.

[0022]

1 and 2 show a side view and a plan view of a riding type rice transplanter configured to a six-row planting specification. This riding type rice transplanter is provided with six-row planting seedlings at the rear of a four-wheel-drive traveling machine body 3 having a pair of left and right steerable front wheels 1 and a pair of left and right non-steerable rear wheels 2. Device 4
Link mechanism 6 driven by hydraulic cylinder 5
It is provided with a basic structure that is connected up and down freely via the.

A transmission case 8 supporting the front wheels 1 is connected and fixed to a front portion of the body frame 7, and a rear transmission case 9 supporting the rear wheels 2 is supported at a rear portion of the body frame 7 so as to be freely rollable. The engine 11 is mounted on the front frame 10 extending forward from the transmission case 8.
Are mounted horizontally and covered with a bonnet 12. An upper portion of the body frame 7 is provided with a step 13 extending over the entire length of the body, and a rear portion of the step 13 is curved rearward and upward to form a fender portion 14 extending above the left and right rear wheels 2. In addition, a center cover portion 15 is protruded from the fender portion 14, and a driver's seat 16 is installed on the center cover portion 15. A steering handle 17 for steering the front wheels, a main shift lever 18, a priority operation lever 20 for elevating and lowering, and the like are provided at a rear portion of the bonnet 12, and the bonnet 12 is provided.
The step portion 13a extending to the left and right sides of the vehicle forms a passage for getting on and off from the front of the fuselage. Has been deployed.

As shown in FIG. 3, on the left side of the transmission case 8, a hydrostatic continuously variable transmission (HST) is interlocked to the engine 11 via a belt transmission 21.
Is connected to the main transmission 22,
The transmission output of No. 2 is transmitted to the transmission case 8 and branched into a traveling system and a working system. Specifically, as shown in the transmission system diagrams of FIGS. 4 and 5, the shifting power from the main transmission 22 is transmitted to the input shaft 24 via the multi-plate main clutch 23 provided therein, and then transmitted to the second shaft. Is transmitted to the shaft 25 at a reduced speed,
Here, it is branched into a traveling system and a working system.

The second shaft 25 and the third shaft 2 which is a traveling system transmission shaft
6, a gear-type auxiliary transmission 2 that performs two-speed shifting
7 is provided, and the power of the traveling system is
7, the left and right front wheels 1 are shifted via the differential device 28.
Is transmitted to Further, a part of the traveling system power transmitted to the differential device 28 is taken out from the rear of the transmission case 8,
The power is transmitted to the rear transmission case 9 via the main transmission shaft 29 arranged in the lower abdomen of the body, and the left and right rear wheels 2 are driven at a speed synchronized with the front wheels 1. A sub-transmission lever 30 for operating the sub-transmission 27 is provided on the left side of the driver's seat 16 so as to be able to swing back and forth. A differential lock pedal 32 for operating a differential lock mechanism 31 provided in the differential device 28 is provided at a position of the driver's seat 16 near the left side of the foot.

Further, only the forward rotation power of the power of the second shaft 25 is taken out via the one-way clutch 33 and is shifted in multiple stages by the inter-stock transmission 34, after which the planting clutch 35
, And is transmitted to the seedling planting device 4 via a work transmission shaft 36 and a telescopic transmission shaft 37 arranged in the lower abdomen of the machine body.

In the rear transmission case 9, a lateral transmission shaft 41 receiving power from the main transmission shaft 29 is laid horizontally, and the power of the lateral transmission shaft 41 is provided by a multi-plate side clutch 42 provided near both ends of the case. The power is transmitted to the axle 44 of the rear wheel 2 via the gear reduction mechanism 43. Also, on one side (the right side in this example) of the rear transmission case 9, a multi-plate type brake 45 acting on the horizontal transmission shaft 41 is provided.
And an operation arm 46 of the brake 45 is interlocked to a pedal 47 provided on the right front of the step 13 via a link rod 48. Further, the support shaft 49 of the pedal 47 extends to the left of the fuselage and is also linked to the main clutch 23, so that the pedal 47 is depressed to operate the brake 45 and to simultaneously operate the main clutch 23. Has become. That is, the pedal 47 functions as a main clutch / brake pedal. Further, in the vicinity of the pedal 47, a lock fitting 49 for locking and locking the pedal 47 depressed to the braking operation position at that position is swingably provided and urged to swing in the unlocking direction. The brake 45 is used as a parking brake by the pedal lock using the lock fitting 49.

As for the left and right side clutches 42, only those inside the turning operation are automatically turned off based on the body steering operation to provide a body steering function. The mechanism 15 is configured as follows. That is, as shown in FIG. 12, a pitman arm 51 which is driven to swing around the vertical axis Z by the steering handle 17 and a knuckle arm 52 of each of the front wheels 1 are operatively connected via a tie rod 53 to form a steering link mechanism. 54, and an operating bracket 51 connected to the pitman arm 51.
a and a relay arm 55 arranged at the lower part near the front and rear middle of the fuselage so as to be swingable around a vertical axis Y by a push-pull rod 56, and a balance arm connected to the upper end of a fulcrum shaft 57 of the relay arm 55. Left and right ends 58 and operation arms 59 of the left and right side clutches 42 are connected to each other via rods 60.

An elongated hole is formed in the link between the operating bracket 51a of the pitman arm 51 and the push-pull rod 56, so that the pitman arm 51 is at a predetermined angle (for example, 30 °) or more from the straight posture. The pitman arm 51 is pushed only when it swings
6, the size of the slot accommodation is set so that the swing less than the set angle is not transmitted.

Therefore, when the left and right front wheels 1 are steered more than a set angle in order to make the aircraft turn significantly, the swing of the pitman arm 51 is transmitted to the balance arm 58 via the relay arm 55, and the pulling operation is performed forward. Rod 60
Only one of the side clutches 42 linked to is operated. In other words, only the side clutch 42 on the inside of the turn is disengaged, the body turns by the three-wheel drive of the front left and right wheels 1 and the rear wheel 2 on the outside of the turn, and the inside rear wheel 2 in the idle state turns the body of the body. The vehicle rotates with the rear wheel 2 inside the turning without unduly damaging the field with the turning movement following the turning movement.

The seedling planting device 4 places a six-row seedling on the seedling rest 61 which is reciprocated laterally with a set stroke to the left and right.
It is configured to include six sets of rotary planting mechanisms 63 for cutting and planting seedlings for each plant, and three leveling floats 64 for leveling planting locations.

As shown in FIG. 7, a horizontally long planting frame 65 is laid on the seedling planting device 4. A feed power receiving work power via a telescopic transmission shaft 36 is provided near the center of the planting frame 65. A case 66 is supported, and three planting cases 67 are connected to the planting frame 65 in a cantilevered rearward direction. Rotating planting mechanisms 63 are respectively provided on the left and right rear ends of the planting cases 67.

The feed case 66 has a screw shaft 68 for driving the seedling rest 61 laterally and a seedling feed belt 69 for vertically feeding the seedlings placed on the seedling rest 61 toward a lower take-out portion.
And a vertical feed drive shaft 70 for operating the seedling rest 61 at each horizontal movement stroke end, and the power taken out of the feed case 66 is transmitted to each planting case 67 via the transmission shaft 71. It has become.

At the base of each planting case 67, a torque limiter 82 for preventing an overload from acting on the planting mechanism 63 is provided, and at the tip of each planting case 67, a left and right planting mechanism 63 is provided. A ridge-side clutch 73 for intermittently transmitting power to the vehicle is provided. The ridge-side clutch 73 is used when planting less than all the lines (in this case, six lines) in the planting process near the ridge, and a part of the line is used in units of two lines. Planting can be suspended.

Each ridge-side clutch 73 is linked via a wire 75 to a ridge-side clutch lever 74 projecting from the driver's seat 16 so as to be able to swing back and forth on the fender portion 14 at the rear end of the fuselage. Have been. In addition,
Although not shown, the drive section of the six seedling feed belts 69 provided on the seedling rest 61 is provided with a longitudinal feed clutch in units of two, and each of the vertical feed clutches is provided with a clutch lever 7 at the ridge.
In connection with 4, the seedling feed belt 69 corresponding to the strip that has been cut and planted and stopped by cutting the ridge-side clutch 73 is also stopped.

The hydraulic cylinder 5 for raising and lowering the seedling planting device 4 is connected to an electromagnetic control valve 80 mounted on the transmission case 8, and operates the electromagnetic control valve 80 based on the driver's artificial command information. The seedling planting apparatus 4 can be raised and lowered arbitrarily by performing the above operation, and the seedling planting apparatus 4 can be moved to the rice field T by controlling the operation of the electromagnetic control valve 80 based on the height detection information for the rice field T of the seedling planting apparatus 4. The automatic raising and lowering is performed in accordance with the following. The schematic configuration of the automatic raising and lowering control means will be described below with reference to FIG.

On the right side of the driver's seat, a potentiometer 8
A planting lever 82 whose operating position is detected by 1 is provided to be able to swing back and forth. This planting lever 82
From the front to the rear, the operation positions of the "planting" position, the "down" position, the "neutral" position, and the "up" position are set, and further, the "auto" The position has been set. When the planting lever 82 is operated to the “planting” position, the planting clutch 35 is engaged by the motor 83 and operated.
At the “down” position, the “neutral” position, and the “up” position, the planting clutch 35 is turned off.

"Planting", "descending", "neutral", and
The operation path for selecting each of the operation positions of “elevation” is an operation used when performing planting work while operating the planting lever 82 or when raising or lowering the seedling planting apparatus 4 to an arbitrary height during non-work. By operating at the “planting” position, the seedling planting apparatus 4 is automatically controlled to move up and down based on the height detection result with respect to the rice field T, regardless of whether the traveling machine 3 is floating or tilting forward and backward. The planting device 4 is maintained at a set height with respect to the rice field T. That is,
Of the three leveling floats 64 provided in the seedling planting apparatus 4, the central leveling float 64 functions as a sensor float SF for detecting the height of the seedling planting apparatus 4 with respect to the rice field T. This sensor float SF Is vertically displaced around the rear fulcrum c due to the fluctuation of the ground pressure, the vertical displacement of the front part of the float is transmitted to the machine body via the sensor wire 84, and is detected by the potentiometer 85.

The potentiometers 81 and 85 are connected to a controller 86, and the operation of the electromagnetic control valve 80 is controlled based on the input information. Here, a reference signal to be compared with an output signal from the potentiometer 85 is set so that the electromagnetic control valve 80 is in a neutral state when the vertical swing posture of the sensor float SF is in a predetermined state, When the output signal from the potentiometer 85 deviates from the range of the reference signal, the electromagnetic control valve 80 is controlled based on the comparison between the output signal from the potentiometer 85 and the reference signal so that the electromagnetic control valve 80 is operated upward or downward. The operation of the electromagnetic control valve 80 is controlled.

Therefore, when the seedling planting apparatus 4 is at a predetermined height with respect to the rice field T, the attitude of the sensor float SF is within the set range, and a neutral state of the down control is brought. Then, when the seedling planting device 4 sinks against the rice field surface, the contact pressure of the sensor float SF increases from the set range, so that the front portion of the sensor float SF is relatively pushed up and displaced, and this is detected by the potentiometer 85. Then, the raising of the seedling planting device 4 is controlled. Further, when the seedling planting device 4 starts to float on the rice field T, the contact pressure of the sensor float SF decreases from the set range, and the sensor float S
The front part of F is displaced downward by its own weight and biasing load,
This is detected by the potentiometer 85 and the planting device 4
Is controlled to descend. As described above, the fact that the sensor float SF is vertically displaced by the fluctuation of the ground pressure is electrically detected by the potentiometer 85, and the operation of the electromagnetic control valve 80 is controlled. It is maintained at the height of.

When the reciprocating planting operation is performed by operating the planting lever 82, the planting lever 82 is moved from the "planting" position to the "elevated" position at once when the planting of one stroke is completed and the ridge is reached. By operating the seedling planting device 4, the planting clutch 35 is disengaged, and at the same time, the direction of the machine body is changed. In this case, when the seedling planting device 4 reaches the upper limit, this is detected by the upper limit switch LS, and the ascent is automatically stopped. Then, when the direction change is near to the end, the planting lever 82 is once operated to the “down” position to lower the seedling planting device 4 until it comes into contact with the rice field T. At this time, the planting clutch 35 is still in the disconnected state. When the change of direction and the alignment for the next planting process are completed, the planting lever 82 is operated to the "planting" position, whereby the automatic raising / lowering control is resumed, and the planting clutch 35 is engaged to move the planting clutch 35 to the next position. The planting run of the process is performed.

The "automatic" position is an operation position for setting a mode for performing the planting operation efficiently by simplifying the operation at the ridge in the reciprocating planting operation.
Of the planting clutch 35 is moved up and down by the priority operation lever 20 disposed on the right side of the steering handle 17.
Is performed as follows.

The priority operation lever 20 is formed in a cross-operation type capable of swinging up and down and swinging back and forth, and is urged to return to a neutral position, so that an up operation and a down operation are performed by an up switch Sw (u). And the down switch Sw (d), the electromagnetic control valve 80 and the electric motor 83 are operated and controlled as follows based on the detection result, and the forward operation and the backward operation are performed by the left switch Sw (L) and Right switch Sw (R)
, And a later-described drawing marker selection operation is performed.

When the upshift switch Sw (u) is turned on once by operating the priority operating lever 20 upward while the planting lever 82 is operated to the "automatic" position, the electric motor 83 is operated and the planting clutch 35 is operated. Is turned off,
After the confirmation of the planting clutch disengagement operation, the electromagnetic control valve 80 is switched to the raising operation state, and the seedling planting device 4 is raised preferentially to the upper limit. Further, when the priority operation lever 20 is operated downward and the down switch Sw (d) is turned on once while the seedling planting device 4 is at the upper limit position, the electromagnetic control valve 80 is switched to the lowering operation state, and the seedling planting is performed. Device 4
Is lowered to the working height. Here, in the first on-operation of the down switch Sw (d), the seedling planting device 4 only operates to descend, the electric motor 83 does not operate, and the planting operation is performed even when the planting device 4 descends to the rice field T. I will not be told. Then, the priority operation lever 20 that has returned to neutral is again operated downward, and the down switch Sw
When (d) is turned on for the second time, the electric motor 83 is actuated, the planting clutch 35 is engaged, and the planting operation is started.

Therefore, if the planting lever 82 is operated to the "automatic" position, when the planting travel of one stroke is completed and the veining is reached, the finger of the priority operation lever 20 is only lightly operated once upward by a light finger operation. Then, the planting clutch 35 is disengaged and the seedling planting device 4 is raised, so that the operator can concentrate on operating the steering handle 17.
In addition, at an appropriate time until the end of the airframe direction change, by lightly operating the priority operation lever 20 once downward with a finger,
The seedling planting apparatus 4 can be lowered until the ground contact without contacting the planting clutch 35. At the end of the change of the airframe direction, alignment to the next step is performed, and the end position of the seedling row in the previous planting step is determined and priority is given. By lightly operating the operation lever 20 downward again, the planting start position of the next process can be aligned with the planting end position of the previous planting process. The above-described operation based on the up / down operation of the priority operation lever 20 is performed only when the planting lever 82 is operated in the “automatic” position, and the planting lever 82 is in the “automatic” position. When the priority operation lever 20 is not operated, the priority operation is not performed.

The rice transplanter can also be raised by the auto-up function in conjunction with the turning of the machine. That is, at the fulcrum of the pitman arm 51 in the steering link mechanism 54,
A potentiometer 87 for detecting the steering angle and the steering direction of the front wheel 1 is provided and connected to the controller 86, and the front wheel 1 has been steered beyond a set angle at which the side clutch automatic operation mechanism 50 operates. Is detected, the electromagnetic control valve 80 is operated, and the seedling planting apparatus 4 is automatically raised to the upper limit. If the priority operation lever 20 is operated upward before the auto-up is performed, the ascending control is performed as described above, and the descending after the ascent operation is performed based on the operation of the priority operation lever 20 as described above. Done.

When the planting lever 54 is operated to the "automatic" position, the automatic raising control (backup control) of the seedling planting apparatus 4 based on the backward movement of the machine is executed. In other words, the main transmission lever 18 that operates the hydrostatic continuously variable transmission 22 as the main transmission to adjust the forward and backward movements in a stepless manner is
A left and right side of the steering handle 17 is provided so as to be capable of swinging back and forth from a forward range F to a reverse range R. When the main speed change lever 18 is operated beyond the neutral N to the reverse range R, the reverse switch is operated. The electromagnetic control valve 80 is preferentially switched to the ascending operation state based on this detection, the seedling planting device 4 is automatically moved up, the planting clutch 35 is turned off, and the leveling float is set by the body reversing. A situation in which the rear portion of the 64 rushes into the rice field T or collides with the ridge is prevented beforehand.

On the left and right sides of the seedling planting device 4, there are provided line drawing markers 91a and 91b for forming a body running reference line of the next stroke on the rice field T so as to be able to swing up and down. The drawing markers 91a and 91b are provided so as to protrude to the drawing action posture, and when the seedling planting device 4 is raised, the operation wires 92a and 92b are pulled by the operation of the quadruple link mechanism 6 so that both the drawing wires 91a and 91b are pulled. Drawing marker 91
Both a and 91b are swung up and swung to the storage position, and are locked and locked to the standing storage position by lock mechanisms 93a and 93b, respectively.

More specifically, as shown in FIGS. 10 and 11,
An operation arm 94 connecting the front ends of the operation wires 92a and 92b is rotatably supported by a fixed bracket 95 around a fulcrum d. The operation arm 94 extends from the base end of the quadruple link mechanism 6 to be integrally rotatable. The operation wire 92 is pressed by the protruding contact lever 6a and forcedly rotated.
a and 92b are drawn, and the drawing markers 91a and 91b are stored upright against the projecting urging force. The lock mechanisms 93a and 93b are configured to lock and hold the operation arm 94 rotated to the storage position with a lock lever 97 rotatable around a fulcrum e and urged by a spring 96. Solenoids 98a and 98b for releasing the lock lever 97 against a spring 96 are mounted on a fixed bracket 95, and are electrically connected to the controller 86. Then, the priority operation lever 20 is
Operate forward or backward in the same way as a turn signal lever of a car to turn left switch Sw (L) or right switch Sw.
By operating (R), one of the corresponding solenoids 98a, 98b is energized to selectively unlock the left or right lock mechanism 93a, 93b.

That is, when the priority operation lever 20 is operated forward from the neutral position, the lock mechanism 93a of the left drawing marker 91a is unlocked, and the priority operation lever 20 is released.
Is operated forward from the neutral position, the lock mechanism 93b of the right drawing marker 79b is unlocked, and only the unlocked one of the drawing markers 91a or 79b is used by the lowering of the seedling planting device 4 to use the posture. It is urged to protrude.

The drawing markers 91a, 91b
Is not only arbitrarily selected using the priority operation lever 20 as described above, but also provided with an auto marker function for automatically performing the operation in accordance with the steering of the aircraft. That is, when the potentiometer 87 detects that the front wheel 1 has been steered beyond the set angle at which the side clutch automatic operation mechanism 50 operates, the direction opposite to the direction in which the front wheel 1 is steered,
That is, the lock mechanisms 93a and 93b of the drawing markers 91a and 91b on the non-planting side are unlocked.

The ridge-side clutch lever 74 includes:
A switch Sw is provided for detecting that the clutch has been operated to be in the clutch disengaged state. When any of the ridge-side clutch levers 74 is operated to be disengaged, the display lamp 99 is turned on so that the driver can recognize the operation. Is configured.
When the switch Sw detects that the clutch lever 74 has been disengaged at the time of the ridge, the above-described auto-up function for automatically raising the seedling planting device 4 in conjunction with the steering of the aircraft, and the linkage with the steering of the aircraft. Then, the above-described auto marker function for selecting a marker is stopped.

The present invention can be implemented in the following modes.

(1) An automatic marker means for automatically selecting a drawing marker to be protruded is set so that the drawing marker to be protruded is alternately switched left and right whenever the seedling planting apparatus 4 is raised. In this case, it is preferable that the raising operation of the planting device 4 by the backup control be suppressed so as not to execute the marker selection.

(2) In the case of manually selecting a drawing marker to be protruded, the automatic marker means may be mechanically configured as follows. For example, as shown in FIGS. 13 to 15, an operation arm 101 that swings integrally by the front-rear swing operation of the priority operation lever 20 about the longitudinal axis f is rotatable around a fulcrum g. The pair of supported rotating members 102a and 102b are configured to selectively contact and rotate, and each of the rotating members 102a and 102b and each of the marker locking mechanisms 93 are provided.
a and 93b are connected to the wire 10 respectively.
3, and the outer member of one wire 103 is displaced by rotating one of the rotating members 102a and 102b by the forward and backward swing of the priority operation lever 20, thereby relatively pulling the one wire 103. The corresponding marker lock mechanisms 93a and 93b are unlocked so that the marker can be manually selected. In the side clutch automatic operation mechanism 50, both ends of the balance arm 58, which is a movable member, are provided. And the rotating members 102a and 102b are linked by a wire 104, and when the balance arm 58 is rotated, one of the wires 103 is pulled to rotate the connected one of the rotating members 102a and 102b. To be configured. According to this, the front wheel 1 is steered beyond the set angle and the side clutch 42 on the inside of the turn is turned.
Is operated, the marker lock mechanisms 93a and 93b of the drawing markers 91a and 91b on the opposite side to the steering direction of the front wheel 1 can be mechanically unlocked in conjunction with this.

[Brief description of the drawings]

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

FIG. 2 is a plan view of the traveling body.

FIG. 3 is a plan view of a front part of the fuselage.

FIG. 4 is a schematic development view mainly showing a traveling system of the transmission structure.

FIG. 5 is a schematic development view mainly showing a working system of the transmission structure.

FIG. 6 is a plan view showing the underbody structure of the traveling body.

FIG. 7 is a plan view showing a main part of the seedling planting apparatus.

FIG. 8 is a plan view of a planting lever.

FIG. 9 is a right side view of the priority operation lever.

FIG. 10 is a side view showing a retractable structure and a lock mechanism of a drawing marker.

FIG. 11 is a plan view of the lock mechanism showing a state where the drawing marker is stored and locked.

FIG. 12 is a block diagram of a control system.

FIG. 13 is a perspective view schematically showing an automatic marker unit using a mechanical marker selection structure.

FIG. 14 is a side view showing a retractable structure and a lock mechanism of a drawing marker according to another embodiment.

FIG. 15 is a plan view of a lock mechanism showing a state where a drawing marker is stored and locked in another embodiment.

[Explanation of symbols]

 Reference Signs List 1 front wheel 3 traveling body 4 seedling planting device 20 lever (priority operation lever) 42 side clutch 50 side clutch automatic operation mechanism 58 member 73 ridge clutch 74 ridge clutch lever 91a line drawing marker 91b line drawing marker 93a marker lock mechanism 93b marker lock mechanism

Continued on the front page F-term (reference) 2B043 AA01 AB03 AB11 BA02 BB06 CA03 CB15 DB05 ED01 ED04 2B062 AA02 AA08 AA11 AB01 BA18 BA35 BA36 BA46 CA03 CA05 CA14 2B304 KA04 KA08 LA02 LA09 LB05 LB16 MA01 MA02 MC12 PA01

Claims (3)

[Claims] 1. A multi-row seedling planting apparatus connected to the rear of a traveling body so as to be able to move up and down, is provided with a pair of left and right line drawing markers for forming a body traveling reference line for the next step on a rice field. In the riding rice transplanter, the left and right drawing markers are both retracted into the storage position in conjunction with the rise of the planting device, and the drawing marker that is operated to project to the working position in conjunction with the lowering of the seedling planting device can be selected. The seedling planting device is provided with a plurality of ridge-side clutches for suspending the planting operation of some of the planting streaks, and a plurality of ridge-side clutch levers for separately operating these ridge-side clutches, and a front wheel. Means for automatically raising the seedling planting device in conjunction with the steering of the front wheel beyond the set angle, and An auto marker means for automatically selecting a drawing marker on a side opposite to the steering direction as a protruding operation, wherein the auto-up operation is performed based on a detection result that any one of the ridge-side clutch levers has been disengaged. And a means for stopping operation of the means and the auto marker means. 2. A multi-row planting seedling planting device connected to the rear of the traveling body so as to be able to move up and down, is provided with a pair of left and right line drawing markers for forming a body traveling reference line for the next step on the rice field. In the riding rice transplanter, the left and right drawing markers are both retracted into the storage position in conjunction with the rise of the planting device, and the drawing marker that is operated to project to the working position in conjunction with the lowering of the seedling planting device can be selected. Each time the raising operation of the seedling planting device, the automatic marker means for automatically selecting alternately the drawing marker to be protruding operation is provided, and backup means for automatically raising the seedling planting device when the traveling body is operated in reverse, The riding rice transplanter according to claim 1, wherein the automatic marker means is not operated in response to the raising operation by the backup means. 3. A seedling planting device having a plurality of planting specifications, which is connected to a rear portion of the traveling machine so as to be able to move up and down, is provided with a pair of left and right drawing markers for forming a machine traveling reference line for the next process on a rice field. In the riding rice transplanter, the left and right drawing markers are both retracted into the storage position in conjunction with the rise of the planting device, and the drawing marker that is operated to project to the working position in conjunction with the lowering of the seedling planting device can be selected. A marker lock mechanism is provided for holding the left and right delineated markers retracted in conjunction with the raising of the seedling planting device, respectively, in a retracted position, and the forward and reverse operations of a lever provided at hand provide the marker lock mechanism. The lock can be released separately for each, and the lever and both marker lock mechanisms are mechanically interlocked and connected via a linking member, so that the front wheel is at or above the set angle. In conjunction with the turning, a side clutch automatic operation mechanism for disengaging the side clutch for the rear wheel on the inside of the turn is provided. The marker lock mechanism is unlocked for the marker drawn on the opposite side of the front wheel steering direction, in conjunction with the linking member that links the both marker lock mechanisms and the front wheel is steered by more than the set angle. A riding rice transplanter characterized by being configured to operate.