JP6628531B2 - Riding rice transplanter - Google Patents

Description

  The present invention relates to a configuration of a seedling planting device in a riding type rice transplanter.

  In the riding type rice transplanter, the planting arm (15 in FIGS. 3 and 4 of Patent Document 1) passes through a seedling outlet (54a in FIGS. 4 and 14 of Patent Document 1) at the lower part of the seedling mounting table. In the configuration in which the seedlings are taken out and planted on the rice field, the planting arm is configured to be able to change the amount of seedlings to be taken out through the seedling takeout opening, so that the consumption of seedlings used for planting can be adjusted. It is composed.

In this case, in Patent Literature 1, with respect to the planting arm driven through a certain trajectory, the positions of the seedling mounting table and the seedling takeout opening are changed up and down to take out the seedling that the planting arm passes. By changing the position of the mouth up and down, the amount of seedling collection is changed.
If the position of the seedling outlet is set to the lower side, the amount of seedlings collected is multi-sided, and if the position of the seedling outlet is set to the upper side, the amount of seedlings is reduced (see FIG. 14 of Patent Document 1). ).

In the riding type rice transplanter, the support member (111 in FIGS. 5 and 16 of Patent Literature 1) provided in the lower part of the seedling planting device has a horizontal support shaft core (see P7 of FIGS. 5 and 16 of Patent Literature 1). ), Floats (17 and 18 in FIG. 5 and FIG. 16 of Patent Document 1) are vertically swingably supported.
A height sensor for detecting the height from the float to the seedling planting device (113, 114 in FIG. 16 of Patent Document 1) is provided so that the detection value of the height sensor is maintained at the planting set value. A link lifting mechanism (4 in FIGS. 1 and 2 of Patent Document 1) that drives the link mechanism (3 of FIGS. 1 and 2 of Patent Document 1) to move up and down is operated by a lifting control unit.
Thus, the seedling planting device is driven up and down with respect to the float following the ground so that the planting device is maintained at the set height. Maintained to depth.

In this case, in Patent Document 1, by changing the position of the support member up and down, changing the position of the float (support shaft center) up and down, and changing the set height of the seedling planting device with respect to the float, The planting depth can be changed.
When the position of the support member is set to the upper side with respect to the seedling planting device (when the vertical distance between the float and the seedling planting device is set to a small side), the planting depth becomes deeper. When the position of the support member is set to the lower side with respect to the device (when the vertical distance between the float and the seedling planting device is set to a large side), the planting depth becomes shallow (see FIG. 16 of Patent Document 1). ).

JP 2003-284415 A

  In a riding type rice transplanter, a link mechanism that can swing up and down is provided at the rear of the body, and the seedling planting device is supported via the link mechanism so as to be able to move up and down.

In Patent Literature 1, when changing the positions of the seedling rest and the seedling take-out opening by changing the positions of the seedling rest and the seedling takeout opening up and down, the seedling takeout lever that changes the position of the seedling rest and the seedling takeout opening up and down (Patent Document 1 of FIG. 3 and FIG. 5 at 84) are provided in a seedling planting apparatus.
Thereby, when the driver changes the amount of seedlings during the planting operation, the driver stops the planting operation, stops the machine, turns around, and turns backward (toward the seedling planting device side). Since it is necessary to operate the lever, there is room for improvement in terms of operability of changing the amount of seedlings to be collected.
SUMMARY OF THE INVENTION An object of the present invention is to improve the operability of changing a seedling collection amount in a riding type rice transplanter.

In Patent Document 1, when changing the planting depth by changing the position of the support member up and down, the planting depth lever changing the position of the support member up and down (see FIGS. 3, 5, 16 of Patent Document 1) 112) is provided in the seedling planting apparatus.
Accordingly, when the driver changes the planting depth during the planting traveling, the driver suspends the planting traveling, stops the aircraft, turns around, and turns backward (toward the seedling planting device side) to plant the planting. Since it is necessary to operate the depth lever, there is room for improvement in the operability of changing the planting depth.
An object of the present invention is to improve the operability of changing a planting depth in a riding type rice transplanter.

[I]
(Constitution)
A first feature of the present invention resides in the following configuration of the riding rice transplanter.
Equipped with a link mechanism that can swing up and down at the rear of the fuselage, supporting the seedling planting apparatus via the link mechanism so as to be able to move up and down,
A seedling rest driven laterally reciprocatingly in the left-right direction, and a planting arm driven through a certain trajectory, wherein the planting arm passes through a seedling outlet at the lower part of the seedling rest. The seedling planting device is configured to take out a seedling and plant it on the rice field,
A position changing unit that supports the seedling mounting table and the seedling takeout opening so that the position can be changed vertically.
The seedling for changing the picking amount of the seedling that the planting arm takes out through the seedling outlet by operating the position changing unit to change the positions of the seedling cradle and the seedling outlet vertically. Take-up actuator,
A seedling harvesting control unit that issues an operation command to the seedling harvesting actuator,
Comprising a seedling picking amount sensor that detects the seedling picking amount set by the seedling picking actuator,
The seedling picking amount actuator is operated such that the operation speed of the seedling pedestal and the seedling takeout opening on the descending side is lower than the operation speed of the seedling pedestal and the seedling takeout opening on the upside. You.

(Action and effect of the invention)
[I] -1
According to the first feature of the present invention, since the position changing unit is operated by the seedling collecting amount actuator to change the seedling collecting amount, the driver does not turn backward (to the side of the seedling planting device). However, the seedling collecting amount can be changed by the seedling collecting amount actuator.

  As described above, even if the driver does not turn backward (toward the seedling planting device), if the amount of seedlings can be changed by the seedling harvesting actuator, the planting travel is interrupted to change the amount of seedlings. It is not necessary to stop the airframe and the seedling harvesting actuator can change the seedling harvesting while planting and running is continued, thereby improving the operability of changing the seedling harvesting. it can.

[I] -2
According to a first aspect of the present invention, the plant includes a seedling collecting amount control unit that issues an operation command to a seedling collecting amount actuator, and a seedling collecting amount sensor that detects a seedling collecting amount set by the seedling collecting amount actuator. Thereby, the first feature of the present invention can easily correspond to the types shown in the following [I] -2-1 and [I] -2-2.

[I] -2-1
The seedling picking lever manually operated by the driver, a position sensor for detecting the operating position of the seedling picking lever, and a value corresponding to the detected value of the seeding sensor (operating position of the seedling picking lever). A model having a seedling harvesting control unit that issues an operation command to a seedling harvesting actuator.
In this way, the driver operates the seedling collecting lever to set the seedling collecting amount arbitrarily according to the driver's intention. In this case, the seedling picking sensor is a position sensor that detects the operating position of the seedling picking lever, and the detected value of the seedling picking sensor (position sensor) is used as it is by the seedling picking actuator set by the seedling picking actuator. It becomes.

[I] -2-2
A position sensor for detecting the position of the seedling collecting actuator, and a seedling that issues an operation command to the seedling collecting actuator based on the detected value of the position sensor so that the seedling collecting value is a preset seedling collecting set value. Model equipped with a take-up amount control unit.
Thus, in response to the setting and changing of the seedling collection value, the seedling harvesting actuator automatically operates by the seedling harvesting control unit so that the seedling harvesting value becomes the seedling harvesting setting value. , position sensor and ing seedlings retracted amount sensor detects the position of the seedling taking quantity actuator.
When the position changing section is operated by the seedling collecting actuator, when the seedling collecting actuator operates on the rising side of the seedling mounting table and the seedling taking-out opening, the seedling mounting table (the seedling placed on the seedling mounting table) is moved. The seedling collecting actuator lifts the weight, and a large load is applied to the seedling collecting actuator.
On the other hand, when the seedling collecting actuator is actuated on the descending side of the seedling mounting and the seedling take-out port, the weight of the seedling mounting (seedling placed on the seedling mounting) is reduced by the weight of the seedling mounting actuator. The operation is accelerated.
According to the first feature of the present invention, the seedling collecting amount is set so that the operating speed of the seedling pedestal and the seedling takeout opening to the descending side is lower than that of the seedling pedestal and the seedling takeout opening to the upside. The actuator is operated.
Thereby, when the seedling collecting amount actuator is actuated to the lower side of the seedling placing table and the seedling taking-out port, the seedling collecting amount can be set to the target value without causing a state where the seedling collecting amount exceeds the target value (overshoot). The value can be changed without difficulty.
[II]
(Constitution)
A second feature of the present invention resides in that the riding rice transplanter according to the first feature of the present invention is configured as follows.
A planting depth actuator for changing the planting depth of seedlings by the planting arm,
A leveling device that is supported at the front of the seedling planting device via a leveling elevating mechanism so as to be able to move up and down, and leveling the rice field;
The link mechanism is connected to the left and right central portions of the seedling planting device, and the seedling harvesting actuator and the planting depth actuator are provided on one of right and left sides of the link mechanism in the seedling planting device. Arrange them side by side,
The leveling elevating mechanism is arranged at the other part on the right or left side of the link mechanism in the seedling planting device.

[III]
(Constitution)
A third feature of the present invention is that the riding rice transplanter according to the first or second feature of the present invention is configured as follows.
The seedling picking actuator is arranged near the left and right central portions of the seedling planting device.

(Action and effect of the invention)
According to the third feature of the present invention, by arranging the seedling collecting actuator near the left and right central portions of the seedling planting device, the seedling collecting actuator hardly affects the left-right balance of the seedling planting device. In addition, the right and left balance of the seedling planting apparatus is improved.

[IV]
(Constitution)
A fourth feature of the present invention resides in that the riding rice transplanter according to the third feature of the present invention is configured as follows.
Right and left auxiliary rear wheels are provided inside the right and left rear wheels, and the seedling picking actuator is disposed between the left and right central portions of the seedling planting device and the auxiliary rear wheels in plan view. By doing
The seedling picking actuator is arranged near the left and right central portions of the seedling planting device.

(Action and effect of the invention)
In a riding type rice transplanter, for example, when traveling in a deep paddy field, right and left auxiliary rear wheels may be provided inside the right and left rear wheels.
According to the fourth feature of the present invention, by arranging the seedling collecting actuator between the left and right central portions of the seedling planting device and the auxiliary rear wheel in plan view, interference between the seedling collecting actuator and the auxiliary rear wheel is reduced. It is possible to arrange the seedling picking actuator near the left and right central portions of the seedling planting device, while avoiding it without difficulty.

[V]
(Constitution)
A fifth feature of the present invention is that the riding rice transplanter according to the third feature of the present invention is configured as follows.
By providing the right and left auxiliary rear wheels inside the right and left rear wheels, by arranging the seedling removal actuator between the link mechanism and the auxiliary rear wheels in plan view,
The seedling collecting amount actuator is arranged near a portion of the link mechanism connected to the seedling planting device.

(Action and effect of the invention)
In a riding type rice transplanter, for example, when traveling in a deep paddy field, right and left auxiliary rear wheels may be provided inside the right and left rear wheels.
According to the fifth feature of the present invention, by arranging the seedling collecting actuator between the link mechanism and the auxiliary rear wheel in a plan view, the seedling collecting actuator can be easily prevented from interfering with the auxiliary rear wheel. The seedling collecting amount actuator can be arranged near the portion of the link mechanism connected to the planting device, and the seedling collecting amount actuator can be arranged near the left and right central portions of the seedling growing device.

[VI]
(Constitution)
A sixth feature of the present invention resides in that one of the riding rice transplanters according to the first to fifth features of the present invention is configured as follows.
In a side view, a planting transmission case that supports the planting arm at the rear is arranged along the front-rear direction, and a lower portion of the seedling rest is arranged at a front portion of the planting arm in the planting transmission case. And extending the seedling rest diagonally forward and upward to constitute the seedling planting apparatus,
In a side view, the seedling collecting amount actuator is arranged between a virtual line extending forward along the planting transmission case and the seedling mounting.

(Action and effect of the invention)
According to the sixth feature of the present invention, the seedling collecting actuator is disposed in a wedge-shaped space between the planting transmission case (virtual line) and the seedling mounting in a side view. It can be arranged compactly in the implanting device.

[VII]
(Constitution)
A seventh feature of the present invention resides in that one of the riding rice transplanters according to the first to sixth features of the present invention is configured as follows.
The seedling removal actuator is an electric motor,
A reduction mechanism that reduces the rotational power of the electric motor to rotationally drive a pinion gear, and a driven gear that has a larger diameter than the pinion gear and meshes with the pinion gear,
The position changing unit is operated by the driven gear.

(Action and effect of the invention)
When the seedling picking actuator is an electric motor, according to the seventh aspect of the present invention, by providing the reduction gear and the driven gear, it is possible to amplify the power of the electric motor and operate the position changing unit. The position changing section can be operated without difficulty even with an electric motor having a small output.

[VIII]
(Constitution)
An eighth feature of the present invention resides in that the riding rice transplanter according to the seventh feature of the present invention is configured as follows.
In a side view, a planting transmission case that supports the planting arm at the rear is arranged along the front-rear direction, and a lower portion of the seedling rest is arranged at a front portion of the planting arm in the planting transmission case. And extending the seedling rest diagonally forward and upward to constitute the seedling planting apparatus,
The driven gear is a sector gear that extends forward from the left-right rotation axis, and the electric motor, the reduction mechanism, and the pinion gear are disposed in front of the driven gear, and the driven gear and the pinion gear are Is configured to rock the driven gear up and down by being engaged,
In a side view, between the imaginary line extended forward along the planting transmission case and the seedling rest, the driven gear, the electric motor, the reduction mechanism and the pinion gear are arranged,
In a side view, an imaginary line connecting the rotation axis of the driven gear and the rotation axis of the pinion gear extends in the forward and upward direction of the seedling rest.

(Action and effect of the invention)
According to the eighth feature of the present invention, by disposing the driven gear, the electric motor, the reduction mechanism and the pinion gear in a wedge-shaped space between the planting transmission case (virtual line) and the seedling rest in a side view, The driven gear, the electric motor, the reduction mechanism, and the pinion gear can be compactly arranged in the seedling plant.

According to the eighth feature of the present invention, an imaginary line connecting the rotation axis of the driven gear (sector-shaped gear) and the rotation axis of the pinion gear extends along the direction of extension of the seedling rest upward and forward in side view. By placing the driven gear (sector-shaped gear) in the vertical direction, the range that is driven to swing up and down can be easily placed in a wedge-shaped space between the planting transmission case (virtual line) and the seedling rest. can do.

[IX]
(Constitution)
A ninth feature of the present invention resides in that the riding rice transplanter according to the seventh or eighth feature of the present invention is configured as follows.
An urging mechanism for urging the driven gear is provided on the descending side of the seedling mounting table and the seedling outlet.

(Action and effect of the invention)
[IX] -1
In the pinion gear and the driven gear of the speed reduction mechanism that is rotationally driven by the electric motor, when the pinion gear of the speed reduction mechanism is rotationally driven to the rising side of the seedling rest and the seedling take-out port, the gear teeth of the pinion gear of the reduction mechanism are driven gears. The gear teeth are pushed, and the driven gear is driven to rotate (as described in the preceding item [I] , when the seedling collecting amount actuator is actuated on the ascending side of the seedling mounting table and the seedling takeout opening). The reason is that the seedling collecting actuator lifts the weight of the seedling mounting table (the seedling placed on the seedling mounting table), and a large load is applied to the seedling collecting actuator.

[IX] -2
When the pinion gear of the speed reduction mechanism is rotationally driven to the descending side of the seedling mounting table and the seedling removal port with respect to the state described in [IX] -1 , the gear teeth of the pinion gear of the speed reduction mechanism are shifted from the gear teeth of the driven gear. It rotates in the direction in which it is going to separate, so that the driven gear rotates so as to follow the pinion gear of the reduction mechanism due to the weight of the seedling rest (seedling placed on the seedling rest).

  In this case, if there is mechanical friction or resistance of each part, when the gear teeth of the pinion gear of the speed reduction mechanism rotate in a direction away from the gear teeth of the driven gear, the mechanical friction and resistance of each part As a result, the driven gear cannot immediately follow the pinion gear of the reduction mechanism, and the gear teeth of the pinion gear of the reduction mechanism are slightly separated from the gear teeth of the driven gear, and then the driven gear rotates, and the gear teeth of the driven gear become the pinion gear of the reduction mechanism. Will be in a state of catching up with the gear teeth.

  In the state described above, when the gear teeth of the driven gear catch up with the gear teeth of the pinion gear of the reduction mechanism, the gear teeth of the driven gear collide with the gear teeth of the pinion gear of the reduction mechanism, and a collision sound is generated. As the pinion gear of the speed reduction mechanism is rotationally driven to the descending side of the seedling rest and the seedling outlet, the above-described collision sound is repeatedly generated.

[IX] -3
According to a ninth feature of the present invention, there is provided a biasing mechanism for biasing a driven gear on the descending side of the seedling mounting table and the seedling outlet.
Thus, as described in [IX] -2 above, when the gear teeth of the pinion gear of the speed reduction mechanism rotate in a direction to be separated from the gear teeth of the driven gear, the gear teeth of the pinion gear of the reduction mechanism are driven gears. The gear teeth of the pinion gear of the reduction mechanism are driven by the urging force of the urging mechanism by applying the urging force of the urging mechanism to the weight of the seedling rest (seedling placed on the seedling rest), The driven gear follows and rotates without delay so as not to separate from the teeth.

As described above, when the driven gear follows and rotates without delay, the gear teeth of the pinion gear of the reduction mechanism are slightly separated from the gear teeth of the driven gear, and then the driven gear rotates and the gear teeth of the driven gear are rotated. This can avoid a state in which the gear teeth catch up with the gear teeth of the pinion gear of the speed reduction mechanism and collide with the gear teeth of the reduction gear mechanism, thereby suppressing the collision noise caused by the collision between the gear teeth of the driven gear and the gear teeth of the pinion gear of the reduction mechanism.
By avoiding a state in which the gear teeth of the driven gear catch up with and collide with the gear teeth of the pinion gear of the reduction mechanism, it is possible to avoid a decrease in the durability of the pinion gear and the driven gear of the reduction mechanism.

The riding type rice transplanter of the present invention is provided with a vertically swingable link mechanism at the rear portion of the fuselage, supports the seedling planting device up and down via the link mechanism, and supports the seedling planting device below the seedling planting device. A height sensor that detects a height from the float to the seedling planting device by supporting a float that follows a ground surface on a rice field so as to be vertically swingable around a support shaft center in the left-right direction of the support member. A lifting control unit that operates a link lifting mechanism that drives the link mechanism up and down so that the detection value of the height sensor is maintained at a planting set value, and the support member for the seedling planting device is provided. By changing the position of the support shaft center with respect to the seedling planting device up and down, thereby changing the planting depth of the seedlings by the planting arm, a planting depth actuator, The planting depth actuator It comprises a planting depth control unit issuing the operation command, and a planting depth sensor for detecting the planting depth set by the planting depth actuator.

According to the present invention, since the planting depth is changed by operating the support member by the planting depth actuator, even if the driver does not turn backward (toward the seedling planting device), The planting depth can be changed by the planting depth actuator.

As described above, if the planting depth can be changed by the planting depth actuator without the driver turning back (to the seedling planting device side), the planting is performed to change the planting depth. There is no need to interrupt the running and stop the machine, and the planting depth can be changed by the planting depth actuator while the planting travel is continued. Performance can be improved.

According to the present invention, there is provided a planting depth control unit that issues an operation command to the planting depth actuator, and a planting depth sensor that detects a planting depth set by the planting depth actuator. Thereby, the present invention can easily cope with the following types.

The planting depth lever manually operated by the driver, a position sensor that detects the operating position of the planting depth lever, and the planting depth is detected by the position sensor (operating position of the planting depth lever). A model equipped with a planting depth control unit that issues an operation command to a planting depth actuator so that the corresponding value is obtained.
Thus, the driver operates the planting depth lever to arbitrarily set the planting depth according to the driver's intention. In this case, the planting depth sensor is a position sensor that detects the operating position of the planting depth lever, and the detection value of the planting depth sensor (position sensor) is set as it is by the planting depth actuator. Planting depth.

A position sensor for detecting the position of the planting depth actuator, and an operation command to the planting depth actuator based on the detected value of the position sensor so that the planting depth becomes a preset planting set value. A model with a planting control unit that emits water.
Accordingly, the planting depth actuator automatically operates by the planting control unit so that the planting depth becomes the planting set value in response to the setting and changing of the planting set value. Yes, the planting depth sensor is a position sensor that detects the position of the planting depth actuator.

In the present invention, it is preferable that the planting depth actuator is disposed near the left and right central portions of the planting device.

According to the present invention, by arranging the planting depth actuator near the left and right central portions of the seedling planting device, the planting depth actuator hardly affects the left-right balance of the seedling planting device. The right and left balance of the planting device is improved.

In the present invention, right and left auxiliary rear wheels are provided inside the right and left rear wheels, and the planting depth is provided between the left and right central portions of the seedling planting device and the auxiliary rear wheels in plan view. By arranging an actuator, it is preferable that the planting depth actuator is arranged near the left and right central portions of the seedling planting device.

In a riding type rice transplanter, for example, when traveling in a deep paddy field, right and left auxiliary rear wheels may be provided inside the right and left rear wheels.
According to the present invention, by arranging the planting depth actuator between the left and right central portions of the seedling planting device and the auxiliary rear wheel in plan view, the interference between the planting depth actuator and the auxiliary rear wheel can be easily achieved. While avoiding, the planting depth actuator can be arranged near the left and right central portions of the planting device.

In the present invention, the linking mechanism is connected to the left and right central portions of the seedling planting device, and the planting depth actuator is disposed near a portion of the link mechanism connected to the seedling planting device. Accordingly, it is preferable that the planting depth actuator is arranged near the left and right central portions of the seedling planting device.

According to the present invention, by arranging the planting depth actuator near the portion of the link mechanism connected to the seedling planting device, the planting depth actuator can be easily placed near the left and right central portions of the seedling planting device. Can be arranged.

In the present invention, the right and left auxiliary rear wheels are provided inside the right and left rear wheels, and the planting depth actuator is disposed between the link mechanism and the auxiliary rear wheel in plan view. Thereby, the planting depth actuator is provided near a portion of the link mechanism connected to the seedling planting device.
It is preferable to arrange the data.

In a riding type rice transplanter, for example, when traveling in a deep paddy field, right and left auxiliary rear wheels may be provided inside the right and left rear wheels.
According to the present invention, by arranging the planting depth actuator between the link mechanism and the auxiliary rear wheel in plan view, the planting of the seedling can be performed while avoiding interference between the planting depth actuator and the auxiliary rear wheel without difficulty. The planting depth actuator can be arranged near the portion of the link mechanism connected to the device, and the planting depth actuator can be arranged near the left and right central portions of the seedling planting device.

In the present invention, a leveling device for leveling a rice field is supported at a front portion of the seedling planting device so as to be able to ascend and descend via a leveling elevating mechanism, and near a portion of the link mechanism connected to the seedling planting device. In the above, it is preferable that the planting depth actuator is disposed on one of the right side and the left side of the link mechanism, and the terrain elevating mechanism is disposed on the other of the right side and the left side of the link mechanism.

In a riding type rice transplanter, a leveling device for leveling the rice field is supported at the front of the seedling planting device, and seedlings are planted while leveling the rice field with the leveling device. Leveling such as at the edge of a ridge may be performed. In this case, the leveling device is often supported by the leveling mechanism so as to be able to move up and down with respect to the seedling planting device.

According to the present invention, a planting depth actuator is disposed on one of the right side and the left side of the link mechanism in the vicinity of the portion of the link mechanism connected to the seedling planting apparatus, and the leveling elevating mechanism is provided on the other of the right side and the left side of the link mechanism By arranging the seedlings, the planting depth actuator and the terrain elevating mechanism hardly affect the left-right balance of the seedling planting apparatus, and the right-left balance of the seedling planting apparatus is improved.

In the present invention, in a side view, a planting transmission case that supports the planting arm at a rear portion is disposed along a front-rear direction, and the seedling rest is provided on a front portion of the planting arm in the planting transmission case. The lower part is arranged, the seedling rest is extended diagonally forward and upward to constitute the seedling planting apparatus, and a virtual line and a virtual line extending forward along the planting transmission case in a side view. It is preferable that the planting depth actuator is arranged between the planting stand.

ADVANTAGE OF THE INVENTION According to this invention, a planting depth actuator is arrange | positioned by arrange | positioning a planting depth actuator in a wedge-shaped space between the planting transmission case (virtual line) and a seedling stand in side view. It can be arranged compactly in the device.

In the present invention, it is preferable that the operating speed of the planting depth actuator on the descending side of the support member is set to be lower than the operating speed of the planting depth actuator on the ascending side of the support member. It is.

When the support member is operated by the planting depth actuator, when the planting depth actuator operates on the rising side of the support member, the planting depth actuator lifts the weight of the float, and the planting depth actuator A large load is applied.
On the other hand, when the planting depth actuator operates on the lower side of the support member, the weight of the float accelerates the operation of the planting depth actuator.

According to the present invention, the operating speed of the planting depth actuator on the lower side of the support member is set lower than the operating speed of the planting depth actuator on the upper side of the support member.
Thus, when the planting depth actuator operates to the lower side of the support member, the planting depth actuator is operated at a low speed, so that the planting depth exceeds the target value (overshoot). ), The planting depth can be easily changed to the target value.

In the present invention, the planting depth actuator is an electric motor, a reduction mechanism for rotating the pinion gear by reducing the rotational power of the electric motor, and a driven gear that is larger in diameter than the pinion gear and meshes with the pinion gear. Preferably, the supporting member is operated by the driven gear.

When the planting depth actuator is an electric motor, according to the present invention, by providing the reduction gear and the driven gear, it is possible to amplify the power of the electric motor and operate the support member. The support member can be operated without difficulty even with an electric motor.

In the present invention, in a side view, a planting transmission case that supports the planting arm at a rear portion is disposed along a front-rear direction, and the seedling rest is provided on a front portion of the planting arm in the planting transmission case. The lower part is arranged, the seedling rest is extended diagonally forward and upward to constitute the seedling planting device, and the driven gear is a sector gear that extends forward from the left-right rotation axis. The electric motor, the reduction mechanism and the pinion gear are arranged in front of the driven gear, and the driven gear and the pinion gear are engaged with each other, so that the driven gear swings up and down. In a side view, the driven gear, the electric motor, the speed reduction mechanism, and the pinion gear are arranged between a virtual line extending forward along the planting transmission case and the seedling rest, and a side view. In the driven gear Virtual line connecting the rotation axis of the rotational axis the pinion gear, it is preferable that extends along the extending direction to the seedling platform front on.

According to the present invention, by disposing the driven gear, the electric motor, the reduction mechanism, and the pinion gear in the wedge-shaped space between the planting transmission case (virtual line) and the seedling rest in a side view, the driven gear, The motor, the speed reduction mechanism and the pinion gear can be compactly arranged in the seedling plant.

According to the present invention, in a side view, an imaginary line connecting the rotation axis of the driven gear (sector-shaped gear) and the rotation axis of the pinion gear is arranged along the direction in which the seedling rest extends forward and upward. Thereby, the range in which the driven gear (segment-shaped gear) is rocked up and down can be easily arranged in a wedge-shaped space between the planting transmission case (virtual line) and the seedling rest in a side view. .

In the present invention, it is preferable that an urging mechanism for urging the driven gear be provided on the descending side of the support member.

A state in which the gear teeth of the pinion gear of the reduction mechanism push the gear teeth of the driven gear when the pinion gear of the reduction mechanism is rotationally driven to the ascending side of the support member in the pinion gear and the driven gear of the reduction mechanism that is rotationally driven by the electric motor. Then, the driven gear is driven to rotate (as described above, when the planting depth actuator operates on the rising side of the support member, the planting depth actuator lifts the weight of the float. And a large load is applied to the planting depth actuator).

When the pinion gear of the speed reduction mechanism is driven to rotate downward on the supporting member with respect to the above-described state, the gear teeth of the pinion gear of the speed reduction mechanism rotate in a direction to move away from the gear teeth of the driven gear. , The driven gear rotates so as to follow the pinion gear of the speed reduction mechanism.

In this case, if there is mechanical friction or resistance of each part, when the gear teeth of the pinion gear of the speed reduction mechanism rotate in a direction away from the gear teeth of the driven gear, the mechanical friction and resistance of each part As a result, the driven gear cannot immediately follow the pinion gear of the reduction mechanism, and the gear teeth of the pinion gear of the reduction mechanism are slightly separated from the gear teeth of the driven gear, and then the driven gear rotates, and the gear teeth of the driven gear become the pinion gear of the reduction mechanism. Will be in a state of catching up with the gear teeth.

In the state described above, when the gear teeth of the driven gear catch up with the gear teeth of the pinion gear of the reduction mechanism, the gear teeth of the driven gear collide with the gear teeth of the pinion gear of the reduction mechanism, and a collision sound is generated. As the pinion gear of the speed reduction mechanism is driven to rotate toward the lower side of the support member, the above-described collision sound is repeatedly generated.

According to the present invention, there is provided an urging mechanism for urging the driven gear on the descending side of the support member.
As a result, as described above, when the gear teeth of the pinion gear of the reduction mechanism rotate in the direction in which the gear teeth of the reduction gear are separated from the gear teeth of the driven gear, the gear teeth of the pinion gear of the reduction mechanism try to separate from the gear teeth of the driven gear. Also, when the urging force of the urging mechanism is applied to the weight of the float, the driven gear rotates without delay so that the gear teeth of the pinion gear of the reduction mechanism do not separate from the gear teeth of the driven gear.

As described above, when the driven gear follows and rotates without delay, the gear teeth of the pinion gear of the reduction mechanism are slightly separated from the gear teeth of the driven gear, and then the driven gear rotates and the gear teeth of the driven gear are rotated. This can avoid a state in which the gear teeth catch up with the gear teeth of the pinion gear of the speed reduction mechanism and collide with the gear teeth of the reduction gear mechanism, thereby suppressing the collision noise caused by the collision between the gear teeth of the driven gear and the gear teeth of the pinion gear of the reduction mechanism.
By avoiding a state in which the gear teeth of the driven gear catch up with and collide with the gear teeth of the pinion gear of the reduction mechanism, it is possible to avoid a decrease in the durability of the pinion gear and the driven gear of the reduction mechanism.

It is a whole side view of a riding type rice transplanter. It is a whole plan view of a riding type rice transplanter. It is a left sectional view of a seedling planting device and a leveling device. It is a front view of a seedling planting device and a leveling device. It is a top view of a seedling planting device and a leveling device. It is left sectional drawing which shows the raising / lowering structure of a leveling device. It is a right view which shows the change structure of the seedling collection amount. It is a right view which shows the change structure of a set height (set depth). It is a front view which shows the change structure of the amount of seedling collection, and the change structure of a set height (set depth). It is a right view which shows the support structure of a height sensor. It is a top view which shows the support structure of a height sensor. FIG. 4 is a diagram illustrating a linked state between the control device and each unit.

The following items [1] to [21] will be described in order.
[1] Overall configuration of riding rice transplanter [2] Overall configuration of seedling planting device 5 [3] Transmission structure to seedling planting device 5 [4] Seedling rest 10 and guide rail 38 (seedling take-out port) The structure described in [4], wherein the planting arm 8 changes the amount of seedlings to be picked up by passing through the seedling outlet 38a of the guide rail 38 by changing the position of the seedlings 38a) up and down. , Support frame 13, electric motor 14, reduction mechanism 15 and driven gear 16, arrangement of seedling picking sensor 44

[6] In the structure described in the preceding item [4], a state in which the amount of seedlings is changed [7] Change in the amount of vertical feeding when the seedlings of the seedling cradle 10 are sent downward by the vertical feeding mechanism 25 [8] [9] Transmission structure to leveling device 53 [10] Elevating structure of leveling device 53

[11] Raising and lowering of the seedling planting device 5 by the raising and lowering operation lever 72 [12] Structure and operation relating to the rolling control unit 76 of the seedling planting device 5 [13] Electric motor 70 in the raising and lowering control unit 73 of the seedling planting device 5 [14] The structure related to the height sensor 68 in the elevation control unit 73 of the seedling planting apparatus 5 [15] The structure described in the above [13] [14], wherein the support frame 69, the electric motor 70, and the speed reduction mechanism 84 And arrangement of driven gear 86, planting depth sensor 91 and height sensor 68

[16] The support frame 13, the electric motor 14, the reduction mechanism 15 and the driven gear 16, the seedling picking sensor 44 according to the above item [4], the support frame 69, the electric motor 70 according to the above items [13] and [14], Arrangement of the reduction mechanism 84 and the driven gear 86, the planting depth sensor 91 and the height sensor 68, and the support frame 52, the electric motor 56, the reduction mechanism 55, the driven gear 54, and the connecting member 58 described in [10] above. 17] In the structure described in [13] or [14], the position of the support arm 41a (the center float 9 and the side float 11) of the support shaft 41 (the horizontal axis P5) with respect to the seedling planting apparatus 5 is changed up and down. [18] Operation of the raising and lowering control unit 73 of the seedling planting apparatus 5 [19] Set seedling collection amount (refer to the previous section [6]) and set height A1 (set depth) (refer to the preceding section [18]) Settings [20] Manual change by [21] Height adjustment of the leveling device 53 of the preceding paragraph [19] configured set seedlings up amount and set as described in height A1 (setting depth)

[1]
Next, the overall configuration of the riding rice transplanter will be described.

  As shown in FIGS. 1 and 2, a link mechanism 3 that can swing up and down is provided at the rear of the body supported by right and left front wheels 1 and right and left rear wheels 2. An eight-row type seedling planting apparatus 5 is supported via a vertically movable mechanism, and a hydraulic cylinder 4 (corresponding to a link elevating mechanism) that drives the link mechanism 3 up and down is provided to constitute a riding type rice transplanter. ing.

  As shown in FIGS. 1, 2, 3, and 4, the link mechanism 3 includes a single top link 3a located at the center in the left and right direction of the body in plan view, and right and left links located on the right and left sides of the top link 3a in plan view. A left link 3b, a top link 3a, and one vertical link 3c connected to the rear of the lower link 3b are provided. As described in [2] to be described later, the vertical link 3c of the link mechanism 3 is connected to a feed case 17 arranged at the left and right central portions of the seedling planting device 5.

As shown in FIGS. 1 and 2, the right and left auxiliary rear wheels 2 a are provided inside the right and left rear wheels 2 so as to be integrally rotated with the right and left rear wheels 2. It is connected to the left rear wheel 2.
As described in [8] described later, the soil leveling device 53 is supported at the front of the seedling planting device 5 so as to be able to move up and down.

[2]
Next, the overall configuration of the seedling planting apparatus 5 will be described.

  As shown in FIGS. 2, 3, 5, the seedling planting apparatus 5 includes one feed case 17, four planting transmission cases 6, and a right-handed rotatably supported rear part of the planting transmission case 6. And the left rotating case 7, two sets of planting arms 8 provided at both ends of the rotating case 7, a center float 9 (corresponding to a float) and a side float 11 (corresponding to a float) in the center, and a mounting surface for eight seedlings And a vertical feeding mechanism 25 provided on each of the seedling mounting surfaces of the seedling mounting table 10 and the like.

  As shown in FIGS. 2, 3, and 5, a feed case 17 is connected to the left and right central portions of the support frame 18 arranged in the left and right direction (the right and left central portions of the seedling planting apparatus 5). Four planting transmission cases 6 are connected. A feed case 17 is rotatably connected to a lower part of the vertical link 3c of the link mechanism 3 around a horizontal axis P1 (see FIG. 4) in the longitudinal direction of the body.

  As shown in FIGS. 4 and 5, a transverse feed shaft 19 extends from the feed case 17, and an end of the transverse feed shaft 19 is supported by a support frame 18 via a bracket 20. As a result, a feed member 21 driven in a reciprocating horizontal feed is externally fitted to the horizontal feed shaft 19, and the feed member 21 is connected to the seedling rest 10. A guide rail 38 is supported by the planting transmission case 6 in the left-right direction, and a lower portion of the seedling rest 10 is supported along the guide rail 38 so as to be able to move laterally in the left-right direction.

  As shown in FIGS. 2, 3, and 4, a support frame 26 is connected to a central portion (a portion adjacent to the right of the feed case 17), right and left ends of the support frame 18, and extends upward to support the support frame. The support frame 50 is connected over the upper part of the frame 26. A guide rail 27 is connected to the upper front surface of the seedling rest 10. The guide rail 27 is supported by rollers 51 supported by a support frame 50 so as to be able to move laterally in the left-right direction.

  As shown in FIG. 3, a belt type vertical feed mechanism 25 is provided on each of the eight seedling placing surfaces of the seedling placing stand 10. As shown in FIGS. 3 and 5, a vertical feed shaft 36 extends from the feed case 17, and an end of the vertical feed shaft 36 is supported by the support frame 18 via a bracket 37. And the right and left drive arms 36a are connected to the drive arm 36a. An input unit 57 for transmitting power to the eight vertical feed mechanisms 25 is provided on the seedling rest 10, and the input unit 57 is located between the right and left drive arms 36 a of the vertical feed shaft 36.

  Thereby, as shown in FIGS. 3, 5 and 7, when the seedling rest 10 reaches the right or left end of the reciprocating horizontal feed drive, the input unit 57 is moved to the right (left) drive arm 36a of the vertical feed shaft 36. Then, the input arm 57a of the input unit 57 is driven by a predetermined angle by the right (left) drive arm 36a of the vertical feed shaft 36, and the seedlings of the seedling rest 10 are lowered by the eight vertical feed mechanisms 25. Sent.

[3]
Next, a transmission structure to the seedling planting apparatus 5 will be described.

  As shown in FIGS. 1 and 5, the power of an engine 49 supported on the front portion of the aircraft is transmitted from a hydrostatic continuously variable transmission (not shown) for traveling and an inter-stock transmission (not shown). The power is transmitted to the input shaft 28 of the feed case 17 via the planting clutch 87 (see FIG. 12) and the PTO shaft 22.

  As shown in FIG. 5, the power of the input shaft 28 is transmitted to the vertical feed shaft 36 to rotate the vertical feed shaft 36, and the power of the input shaft 28 is transmitted through the horizontal feed transmission mechanism 29. 19, and the transverse feed shaft 19 is rotationally driven.

  As shown in FIG. 5, the power of the input shaft 28 is transmitted to the transmission chain 30, the transmission shaft 23 erected over the planted transmission case 6, and the input shaft 32 of the planted transmission case 6. Is transmitted to the rotating case 7 via the torque limiter 33, the transmission chain 34, the minority clutch 24, and the drive shaft 35. A cylindrical cover 60 is fixed across the planting transmission case 6, and the transmission shaft 23 is covered by the cover 60.

As a result, as shown in FIG. 5, when the planting clutch 87 is operated in the transmission state, the rotating case 7 is moved in a direction opposite to the plane of FIG. The seedling is rotated clockwise, and the planting arm 8 passes through the seedling take-out opening 38a (see FIG. 7) of the guide rail 38, takes out the seedling from the lower part of the seedling rest 10, and plants it on the rice field surface G. When the platform 10 reaches the right or left end of the reciprocating lateral feed drive, the eight vertical feed mechanisms 25 feed the seedlings of the seedling rest 10 downward.
When the planting clutch 87 is operated to be in the disengaged state, the reciprocating horizontal feed drive of the seedling placing table 10, the rotary drive of the rotating case 7, and the vertical feed mechanism 25 are stopped.

[4]
Next, by changing the positions of the seedling holder 10 and the guide rail 38 (the seedling take-out opening 38a) up and down, the planting arm 8 passes through the seedling take-out opening 38a of the guide rail 38 to reduce the amount of seedlings taken out. The structure to be changed will be described.

  As shown in FIGS. 3 and 7, a bracket 6 a is connected to the lateral side of the planting transmission case 6, and a support rod 38 b connected downward to the guide rail 38 slides up and down on the bracket 6 a of the planting transmission case 6. It is freely inserted. Thus, the seedling rest 10 and the guide rail 38 (the seedling take-out opening 38a) can be freely moved up and down.

  As shown in FIG. 7, a receiving portion 6 b is provided on the upper surface of the planting transmission case 6 (the front portion of the planting arm 8), and the receiving portion 6 b extends over the receiving portions 6 b of the four planting transmission cases 6. The support shaft 12 (corresponding to a position changing unit) is rotatably supported. A plurality of support arms 12 a (corresponding to a position changing unit) connected to the support shaft 12 are inserted into a front portion of the guide rail 38.

  As shown in FIGS. 2, 7, and 9, in the support frame 18, a portion between the center support frame 26 and the right auxiliary rear wheel 2a in a plan view and a front view has an inverted L-shaped support in a side view. The frame 13 is connected, and the support frame 13 extends upward and diagonally forward and upward. An electric motor 14 (corresponding to a seedling removing actuator) and a speed reduction mechanism 15 (with a built-in worm gear) are connected to the bracket 13a at the upper end of the support frame 13, and a cover 42 that covers the electric motor 14 and the speed reduction mechanism 15 is It is connected to the bracket 13a of the support frame 13.

As shown in FIGS. 7 and 9, a support shaft 16 a of a large-diameter driven gear 16, which is a sector gear, is provided on a boss 13 b of the support frame 13 around a horizontal axis P 7 (corresponding to a rotation axis) in the left-right direction. The driven gear 16 extends forward, and the small-diameter pinion gear 15 a of the speed reduction mechanism 15 is engaged with the driven gear 16.
An operation arm 43 is connected to the operation arm 12b connected to the support shaft 12, and extends forward. A pin 16b connected to the driven gear 16 is inserted into a long hole 43a at a front portion of the operation arm 43. Have been.

  As shown in FIGS. 7 and 9, a seedling collecting sensor 44 is connected to the bracket 13 c of the support frame 13, and the seedling collecting sensor 44 is connected to the support shaft 16 a of the driven gear 16. Thus, the angle (seedling amount) of the driven gear 16 can be detected by the seedling harvesting sensor 44, and the detection value (seedling harvesting) of the seedling harvesting sensor 44 is controlled by the controller 40 (see FIG. 12). Has been entered.

When connecting the seedling collecting amount sensor 44 to the bracket 13c of the support frame 13, as shown in FIGS. 7 and 9, the positioning pin 59 is inserted in advance between the support frame 13 and the operation arm 43, and the driven gear 16 and the operation arm 43 are temporarily fixed at predetermined positions.
Thus, the seedling collecting sensor 44 can be accurately connected to the bracket 13c of the support frame 13. After the seedling collecting sensor 44 is connected, the positioning pin 59 is removed.

  In this case, in place of the positioning pin 59, a mark is engraved on the support frame 13, the driven gear 16, and the operation arm 43, and the driven gear 16 and the operation arm 43 are temporarily fixed at predetermined positions in accordance with the mark, and the support frame is The seedling collection sensor 44 may be connected to the 13 bracket 13c.

[5]
Next, the arrangement of the support frame 13, the electric motor 14, the reduction mechanism 15, the driven gear 16, and the seedling picking sensor 44 in the structure described in the above item [4] will be described.

  As shown in FIGS. 2, 7, and 9, between the center support frame 26 (left and right central portions of the seedling planting device 5) and the right auxiliary rear wheel 2a in plan view and front view, the support frame 13 is electrically driven. The motor 14, the reduction mechanism 15, the driven gear 16, and the seedling picking sensor 44 are arranged.

As a result, the support frame 13, the electric motor 14, the reduction mechanism 15, the driven gear 16, and the seedling picking sensor 44 are arranged near the left and right central portions of the seedling planting device 5 in a plan view and a front view. .
In a plan view and a front view, the support frame 13, the electric motor 14, the reduction mechanism 15, the driven gear 16, and the seedling picking sensor 44 are arranged between the left and right central portions of the seedling planting apparatus 5 and the auxiliary rear wheel 2a. State.
The support frame 13, the electric motor 14, the speed reduction mechanism 15 and the driven gear 16, and the seedling picking sensor 44 are located near the link mechanism 3 connected to the left and right central portions of the seedling planting apparatus 5 in plan view and front view. It will be in the state arranged in.
In a plan view and a front view, the support frame 13, the electric motor 14, the reduction mechanism 15, the driven gear 16, and the seedling picking sensor 44 are connected to the link mechanism 3 connected to the left and right central portions of the seedling planting apparatus 5 and the auxiliary rear wheel. 2a.

As shown in FIG. 7, the planting transmission case 6 that rotatably supports the planting arm 8 at the rear thereof is disposed along the front-rear direction in the seedling planting device 5 in a side view. The lower part (guide rail 38) of the seedling rest 10 is arranged in the front part of the planting arm 8, and the seedling rest 10 extends obliquely forward and upward.
In a side view, a wedge-shaped space is formed between the imaginary line L1 extending forward along the planting transmission case 6 and the seedling rest 10, and is supported in the wedge-shaped space in a side view. The frame 13, the electric motor 14, the reduction mechanism 15, the driven gear 16, and the seedling picking sensor 44 are arranged.

As shown in FIG. 7, an electric motor 14 and a speed reduction mechanism 15 (pinion gear 15a) are arranged in front of a driven gear 16, which is a sector gear, in a side view.
In a side view, a virtual line L2 connecting the horizontal axis P7 of the driven gear 16 and the rotation axis of the pinion gear 15a of the reduction mechanism 15 is slightly lower than the direction in which the seedling rest 10 extends forward and upward. Thus, the seedling stand 10 extends in the forward and upward extending direction.
In this case, since the direction of the center position of the vertical swing range of the driven gear 16 is the imaginary line L2, the direction of the center position of the vertical swing range of the driven gear 16 is directed upward and forward of the seedling rest 10. It is in a state slightly downward from the extending direction.

[6]
Next, a description will be given of a state in which the seedling collection amount is changed in the structure described in [4].

As shown in FIG. 7, when the planting arm 8 passes through the seedling take-out opening 38a of the guide rail 38 and takes out the seedling from the lower part of the seedling placing stand 10, the planting arm 8 passes along a fixed trajectory.
As shown in FIG. 7, when the driven gear 16 is driven to swing downward by the electric motor 14 and the reduction mechanism 15 (the pinion gear 15a of the reduction mechanism 15 is driven to rotate counterclockwise in FIG. 16), the operation arm 43 is operated downward, and the support arm 12a of the support shaft 12 is operated upward.

As a result, as shown in FIG. 7, the support arm 12a of the support shaft 12 causes the seedling rest 10 and the guide rail 38 to resist the weight of the seedling rest 10 (the seedling placed on the seedling rest 10). (The seedling take-out opening 38a) is operated to the ascending side.
As described above, when the positions of the seedling rest 10 and the guide rail 38 (the seedling take-out opening 38a) are set to the upper side, the planting arm 8 passes through the seedling take-out opening 38a of the guide rail 38 while entering shallowly. However, the amount of seedlings collected is small.

  As shown in FIG. 7, when the driven gear 16 is oscillated upward by the electric motor 14 and the reduction mechanism 15 (the pinion gear 15a of the reduction mechanism 15 is rotated clockwise in FIG. The support arm 12a of the support shaft 12 is operated downward by the weight of the seedling rest 10 (the seedling placed on the seedling rest 10), and the operation arm 43 is moved. Operated upward.

As a result, as shown in FIG. 7, the weight of the seedling rest 10 (the seedling placed on the seedling rest 10) causes the seedling rest 10 and the guide rail 38 (the seedling takeout opening 38a) to be operated on the descending side. You.
As described above, when the positions of the seedling placing table 10 and the guide rail 38 (the seedling take-out opening 38a) are set to the lower side, the planting arm 8 passes through the seedling take-out opening 38a of the guide rail 38 while entering deeply. Therefore, the amount of seedlings collected is multi-sided.

As shown in FIG. 12, the control device 40 includes a seedling collection amount control unit 102 as software.
Thus, as described in [19] described later, when the set amount of seedlings is set, an operation command is output from the control device 40 (the amount of seedling control unit 102) to the electric motor 14, and the amount of seedlings is collected. As described above, the support arm 12a of the support shaft 12 is operated upward and downward so that the detection value (the amount of seedling harvested) by the sensor 44 becomes the set amount of seedling harvested (the amount of seedling harvested is large and small). Will be changed to).

[7]
Next, a description will be given of a change in the amount of vertical feeding when the seedlings on the seedling mounting table 10 are sent downward by the vertical feeding mechanism 25.

  As described in the preceding section [6], when the amount of seedlings is changed, the amount of vertical feeding by the vertical feed mechanism 25 also needs to be changed in conjunction therewith. The amount of vertical feeding by the vertical feeding mechanism 25 is changed to the large side when the amount of vertical feeding by the vertical feeding mechanism 25 is changed to the small side, and the amount of seedling collection is increased.

  As shown in FIGS. 4 and 7, in the support shaft 12, right and left operation arms 12c are connected to portions of the vertical feed shaft 36 near the right and left drive arms 36a. A guide rod 12d is connected to the operation arm 12c. As described in [6] above, when the amount of seedlings is changed by operating the support arm 12a of the support shaft 12 upward and downward, the guide rod 12d of the support shaft 12 also moves forward and rearward in conjunction with this. Move to the side.

  As shown in FIGS. 4 and 7, a receiving portion 57b integrally extending from an input arm 57a of the input portion 57 is in contact with the guide rod 12d of the support shaft 12 from the front side. Is driven in a reciprocating direction in the left-right direction, so that the receiving portion 57b of the input portion 57 slides in the left-right direction along the guide rod 12d of the support shaft 12.

As shown in FIGS. 4 and 7, the position where the receiving portion 57b of the input portion 57 contacts the guide rod 12d of the support shaft 12 is the standby position of the input arm 57a of the input portion 57.
As described in [2] above, when the seedling rest 10 reaches the right end (left end) of the reciprocating lateral feed drive, the drive arm 36a on the right (left) of the vertical feed shaft 36 is moved to the input part of the standby position. The input arm 57a of the input unit 57 is driven by a predetermined angle from the standby position by contacting the input arm 57a of the input unit 57, and the right (left) drive arm 36a of the vertical feed shaft 36 is separated from the input arm 57a of the input unit 57. Then, the input arm 57a of the input unit 57 returns to the standby position.
In this case, the terminal position where the right (left) drive arm 36a of the vertical feed shaft 36 is separated from the input arm 57a of the input unit 57 is the same position regardless of the change in the amount of seedlings.

With the above structure, as shown in FIG. 7, when the seedling collecting amount is set to a small side, the guide rod 12d of the support shaft 12 moves to the front side, and the receiving portion 57b of the input section 57 is pushed to the front side. The standby position of the input arm 57a of the unit 57 is changed to the front side and approaches the terminal position.
As described above, when the standby position approaches the end position, the angle from the standby position to the end position becomes smaller, so that the predetermined angle at which the input arm 57a of the input unit 57 is driven from the standby position to the end position becomes smaller. Thus, the vertical feed amount by the vertical feed mechanism 25 is set to the small side.

As shown in FIG. 7, when the seedling collection amount is set to multiple sides, the guide rod 12d of the support shaft 12 moves to the rear side, and the receiving portion 57b of the input section 57 follows the rear side. The standby position of the input arm 57a is changed to the rear side and moves away from the terminal position.
As described above, when the standby position moves away from the terminal position, the angle from the standby position to the terminal position increases, so that the predetermined angle at which the input arm 57a of the input unit 57 is driven from the standby position to the terminal position increases. , The vertical feed amount by the vertical feed mechanism 25 is set to the large side.

[8]
Next, the overall configuration of the ground leveling device 53 will be described.

  As shown in FIGS. 3, 4, and 5, a support case 64 is connected to the planting transmission case 6 at the left end, and the transmission case 23 is arranged around the horizontal axis P2 of the transmission shaft 23 and the input shaft 32 in the lateral direction of the machine body. 81 is supported by the support case 64 so as to be swingable up and down, and extends obliquely forward and downward.

  As shown in FIGS. 3, 4, and 5, the support frame 82 is connected to the planting transmission case 6 at the right end, and the horizontal axis P2 of the support frame 82 (the horizontal axis P2 of the transmission shaft 23 and the input shaft 32). A support arm 83 is supported to be swingable up and down, and extends obliquely forward and downward. A drive shaft 61 having a square cross section is rotatably supported around a horizontal axis P6 in the left-right direction across the transmission case 81 and the support arm 83.

  As shown in FIGS. 3, 4, and 5, a small-diameter, large-diameter rotator 62 integrally formed of a synthetic resin is provided, and a synthetic resin small-diameter rotator having the same configuration as the rotator 62 is provided. 63 are provided. The rotator 62 is attached so as to be aligned along the direction of the horizontal axis P6 of the drive shaft 61, and the rotator 63 is attached to the drive shaft 61 similarly to the rotator 62.

As shown in FIGS. 2, 4, and 5, in the ground leveling device 53, the rotating body 62 is located in front of the side float 11, and the rotating body 63 is located in front of the center float 9.
As shown in FIGS. 3, 4, 5, and 6, a bracket 65 is connected to the transmission case 81 and the support arm 83, and a round pipe-shaped support frame 67 is connected across the bracket 65. Are connected to the support frame 67.

As shown in FIGS. 1, 3, 4, and 5, a ground leveling device 53 includes a drive shaft 61, rotating bodies 62 and 63, a cover 66, a support frame 67, a transmission case 81, a support arm 83, and the like.
A leveling device 53 is supported at the front of the seedling planting device 5, and a leveling device 53 is disposed behind the rear wheel 2. The transmission case 81 and the support arm 83 swing up and down around the horizontal axis P2. By doing so, the leveling device 53 is supported at the front of the seedling planting device 5 so as to be able to move up and down.

[9]
Next, a transmission structure to the leveling device 53 will be described.

  As shown in FIG. 5, the input shaft 32 of the planting transmission case 6 at the left end enters the inside of the support case 64, and the transmission shaft 75 is concentric with the input shaft 32, and is inserted into the support case 64 and the transmission case 81. The clutch mechanism 45 is provided between the input shaft 32 and the transmission shaft 75 inside the support case 64.

  As shown in FIG. 5, a sprocket 78 is externally fitted to a transmission shaft 75 so as to be relatively rotatable inside a transmission case 81, a sprocket 79 is connected to the drive shaft 61, and a transmission chain 80 extends over the sprockets 78 and 79. Is attached. A torque limiter 77 is provided between the transmission shaft 75 and the sprocket 78.

  As shown in the previous section [3] and FIG. 5, when the power of the engine 49 is transmitted to the input shaft 28, the transmission chain 30, the transmission shaft 23, and the input shaft 32 via the planting clutch 87 and the PTO shaft 22, The power of the input shaft 32 is transmitted to the drive shaft 61 via the clutch mechanism 45, the transmission shaft 75, the torque limiter 77, and the transmission chain 80, and the drive shaft 61 and the rotating body 62 are moved around the horizontal axis P6 in FIG. It is driven to rotate counterclockwise.

In this case, the drive shaft 61 and the rotating bodies 62 and 63 are rotationally driven at a speed higher than the traveling speed of the body (the outer peripheral portion of the rotating body 62 is faster than the outer peripheral portions of the right and left rear wheels 2). The drive shaft 61 and the rotating bodies 62 and 63 are driven to rotate at high speed so that the speed becomes high.)
As a result, the field surface G in front of the planting arm 8 is leveled (scratched) by the rotating bodies 62 and 63, and scattering of mud from the rotating bodies 62 and 63 to the rear is stopped by the cover 66.

  As described in the above item [3], the seedling planting device 5 (planting of seedlings by the planting arm 8) is operated and stopped by operating the planting clutch 87 in the transmission and cut-off states by the electric motor 89. At the same time, the operation and stop of the leveling device 53 (the drive shaft 61 and the rotating bodies 62 and 63) are performed.

[10]
Next, the lifting structure of the leveling device 53 will be described.

  As shown in FIGS. 2, 3, and 4, the support frame 52 is attached to the support frame 18 so as to be located between the link mechanism 3 (vertical link 3c) and the left auxiliary rear wheel 2a in plan view and front view. The support frame 52 extends upward and obliquely forward and upward from the support frame 18 in a side view. As shown in FIGS. 3, 4, and 6, a driven gear 54 (corresponding to a leveling elevating mechanism) of a sector gear is supported so as to be able to swing up and down around a horizontal axis P3 in the middle part of the support frame 52 in the left-right direction. Have been.

As shown in FIGS. 3, 4, and 6, a reduction mechanism 55 (corresponding to a leveling elevating mechanism) having a pinion gear 55a and an electric motor 56 (corresponding to a leveling elevating mechanism) for driving the reduction mechanism 55 are provided on the support frame 52. The pinion gear 55 a of the speed reduction mechanism 55 is engaged with the driven gear 54 so as to be connected to the upper part. A bearing 58 a of a connection member 58 (corresponding to a leveling elevating mechanism) is rotatably fitted to the drive shaft 61 by a bearing (not shown), and the connection member 58 is connected to the driven gear 54.
Accordingly, the support frame 52, the electric motor 56, the speed reduction mechanism 55, the driven gear 54, and the connection member 58 are provided between the link mechanism 3 (vertical link 3c) and the left auxiliary rear wheel 2a in plan view and front view. Are located.

With the above structure, as shown in FIGS. 3 and 6, the pinion gear 55a of the speed reduction mechanism 55 is driven to rotate forward and reverse by the electric motor 56, and the driven gear 54 swings up and down around the horizontal axis P3. Thus, the leveling device 53 is moved up and down with respect to the seedling planting device 5.
As shown in FIG. 12, the electric motor 56 extends over a working position A3 where the seedling planting device 5 is located on the rice field G and touches the rice field G and a non-working position A4 located above the rice field G. The raising and lowering operation of the ground leveling device 53 is performed.

  In this case, in the ground leveling device 53, the clutch mechanism 45 and the cover 66 are mechanically connected by a wire (not shown). Thus, when the leveling device 53 rises to the non-working position A4, the clutch mechanism 45 is operated by a wire to be in a disconnected state, the leveling device 53 is stopped, and when the leveling device 53 is lowered to the working position A3, the clutch mechanism is moved by the wire. 45 is operated in the transmission state, and the leveling device 53 operates.

  As shown in FIG. 6 and FIG. 12, a potentiometer type height sensor 74 is connected to the support frame 52 so as to be located at the horizontal axis P3, and the height sensor 74 and the driven gear 54 are connected. The detection value of the height sensor 74 is input to the control device 40. By detecting the angle of the driven gear 54 with respect to the support frame 52 by the height sensor 74, the height of the leveling device 53 with respect to the seedling planting device 5 is detected.

[11]
Next, the raising and lowering of the seedling planting apparatus 5 by the raising and lowering operation lever 72 will be described.

As shown in FIGS. 1, 2, and 12, an elevating operation lever 72 is provided on the right lateral side of the driver's seat 31. The elevating operation lever 72 is configured to be operable at an ascending position, a neutral position, a descending position, and a planting position. The operation position of the elevating operation lever 72 is input to the control device 40.
A potentiometer type height sensor 88 for detecting the angle of the link mechanism 3 with respect to the body is provided, and the detection value of the height sensor 88 is input to the control device 40, and the angle of the link mechanism 3 with respect to the body is detected. The height of the seedling planting apparatus 5 with respect to the airframe can be detected.

  As shown in FIG. 12, a control valve 71 for supplying and discharging hydraulic oil to the hydraulic cylinder 4 to expand and contract the hydraulic cylinder 4 and an electric motor 89 for operating the planting clutch 87 in a transmission and cutoff state are provided. ing. As described in [12] and [18], which will be described later, the control device 40 includes a lifting control unit 73 and a rolling control unit 76 as software.

The raising / lowering control unit 73 maintains the seedling planting apparatus 5 at the set height A1 from the rice field G as described in [18] described later (sets the planting depth of the seedling by the planting arm 8 to the set depth). To maintain).
The rolling control unit 76 keeps the seedling planting device 5 horizontal (maintains the seedling planting device 5 parallel to the rice field surface G in the left-right direction) as described in [12] described later.
Thereby, the control valve 71, the electric motors 56 and 89, the elevating control unit 73, and the rolling control unit 76 are operated by the control device 40, and the operation of the seedling planting device 5 and the leveling device 53 as described below and [described later] 12] The operation as described in [18] is performed.

  As shown in FIG. 12, when the raising / lowering operation lever 72 is operated to the ascending position, the planting clutch 87 is operated to be in the disengaged state, and the leveling device 53 is raised to the non-working position A4 (the planting clutch 87 and the clutch mechanism 45). Is operated in the cutoff state, the ground leveling device 53 is stopped), and the hydraulic cylinder 4 is contracted and the seedling planting device 5 is raised in a state where the elevation control unit 73 and the rolling control unit 76 are stopped. When the seedling planting device 5 reaches the upper limit position of the link mechanism 3, the hydraulic cylinder 4 stops, and the seedling planting device 5 stops at the upper limit position.

  As shown in FIG. 12, when the raising / lowering operation lever 72 is operated to the neutral position, the planting clutch 87 is operated to be in the disengaged state, and the leveling device 53 is raised to the non-working position A4 (the planting clutch 87 and the clutch mechanism 45). The hydraulic cylinder 4 is stopped and the raising and lowering of the seedling planting apparatus 5 is stopped in a state where the ground control device 53 and the rolling control unit 76 are stopped.

  As shown in FIG. 12, when the raising / lowering operation lever 72 is operated to the lowered position, the planting clutch 87 is operated to be in the disengaged state, and the leveling device 53 is raised to the non-working position A4 (the planting clutch 87 and the clutch mechanism 45). Is operated in the cutoff state, the ground leveling device 53 is stopped), the hydraulic cylinder 4 is extended and the seedling planting device 5 is lowered in a state in which the elevating control unit 73 and the rolling control unit 76 are stopped, When the center float 9 touches the rice field surface G, the elevation control unit 73 and the rolling control unit 76 operate.

  As shown in FIG. 12, when the raising / lowering operation lever 72 is operated to the planting position, the planting clutch 87 is operated to the transmission state, and the ground leveling device 53 is lowered to the work position A3 (the planting clutch 87 is set to the transmission state). When the clutch mechanism 45 is operated and the clutch mechanism 45 is operated in the transmission state, the ground leveling device 53 is operated), and the elevating control unit 73 and the rolling control unit 76 are operated.

[12]
Next, the structure and operation of the rolling control unit 76 of the seedling planting apparatus 5 will be described.

  As shown in the previous section [2] and FIG. 4, the feed case 17 is rotatably supported around the horizontal axis P1 below the link mechanism 3 (the vertical link 3c). As shown in FIG. 12, a tilt sensor 48 is connected to the feed case 17, and a tilt angle of the seedling planting device 5 in the left-right direction with respect to a horizontal plane (field surface G) is detected by the tilt sensor 48. The detected value has been input to the control device 40.

As shown in FIG. 4, a rolling mechanism 46 is provided at an upper rear portion of the link mechanism 3.
The rolling mechanism 46 includes a pair of wires 46a that are pushed and pulled in the left-right direction, a gear mechanism (not shown) that pushes and pulls the wires 46a, and an electric motor 46b. A spring 47 is connected between the right and left end brackets 27a of the guide rail 27 and the arm 46c connected to the rolling mechanism 46. The spring 47 is connected to the wire 46a of the rolling mechanism 46 and the right and left of the support frame 50. A spring 39 is connected to the left side.

  As a result, as shown in the previous section [2] and FIG. 4, when the seedling placing table 10 is driven to move to the right (left), the right (left) spring 47 is extended, and the right (left) spring 47 is extended. The rightward (left) inclination of the seedling planting apparatus 5 is suppressed by the urging force of the spring 47.

Next, the operation of the rolling control unit 76 of the seedling planting apparatus 5 will be described.
The inclination angle of the seedling planting apparatus 5 in the left-right direction with respect to the horizontal plane (field surface G) is detected by the inclination sensor 48, and the difference between the horizontal plane (field surface G) and the detection value of the inclination sensor 48 is detected.
When the seedling planting device 5 is displaced rightward from the horizontal plane (the rice field surface G), an operation command is output from the control device 40 (the rolling control unit 76) to the electric motor 46b of the rolling mechanism 46, and the operation of the rolling mechanism 46 is stopped. The electric motor 46b operates, the wire 46a of the rolling mechanism 46 is pushed and pulled, and the seedling planting apparatus 5 rolls to the left.

When the seedling planting device 5 is displaced to the left from the horizontal plane (field surface G), an operation command is output from the control device 40 (rolling control unit 76) to the electric motor 46b of the rolling mechanism 46, and the rolling mechanism 46 The electric motor 46b operates, the wire 46a of the rolling mechanism 46 is pushed and pulled, and the seedling planting apparatus 5 rolls rightward.
When the seedling planting apparatus 5 has the same inclination angle as the horizontal plane (the rice field surface G), the rolling of the seedling planting apparatus 5 stops.
As described above, the seedling planting apparatus 5 is maintained horizontally (maintained parallel to the rice field G in the left-right direction).

[13]
Next, the structure of the electric motor 70 (corresponding to the planting depth actuator) in the elevation control unit 73 of the seedling planting apparatus 5 will be described.

  As shown in FIGS. 3 and 8, a support shaft 41 (corresponding to a support member) is rotatably supported around a horizontal axis P4 in the lower part of the planting transmission case 6 in the left-right direction, and is connected to the support shaft 41. The supporting arm 41a (corresponding to a supporting member) extends obliquely rearward and downward. Around the horizontal axis P5 (corresponding to the support axis) at the rear end of the support arm 41a of the support shaft 41, the rear portions of the center float 9 and the side float 11 are vertically swingably supported.

  As shown in FIGS. 2, 8, and 9, in the support frame 18, a support frame 69 is connected to a portion between the link mechanism 3 (vertical link 3c) and the center support frame 26 in plan view and front view. , Upward and obliquely forward and upward. An electric motor 70 and a speed reduction mechanism 84 (with a built-in worm gear) are connected to a bracket 69a at the upper end of the support frame 69, and a cover 85 covering the electric motor 70 and the speed reduction mechanism 84 is connected to the bracket 69a of the support frame 69. Have been.

  As shown in FIGS. 8 and 9, a large-diameter driven gear 86, which is a sector gear, rotates around a horizontal axis P8 (corresponding to a rotation axis) in the left-right direction on a bracket 69b connected to the support frame 69. The driven gear 86 is freely supported and extends forward, and the small-diameter pinion gear 84a of the speed reduction mechanism 84 and the driven gear 86 are engaged. A laterally bent portion 86b is provided on the upper side of the driven gear 86 to improve the strength of the driven gear 86. A notch 86c for preventing interference with the link 97 described in [14] described below is provided on the lower side of the driven gear 86.

As shown in FIGS. 8 and 9, an operation arm 90 is connected to the support shaft 41 and extends upward and forward. A pin 86 a connected to the driven gear 86 is connected to an opening at the front of the operation arm 90. Is inserted in the part.
The planting depth sensor 91 is connected to the bracket 69 b of the support frame 69, and the planting depth sensor 91 is connected to the driven gear 86. Thereby, the angle (planting depth) of the driven gear 86 can be detected by the planting depth sensor 91, and the detection value (planting depth) of the planting depth sensor 91 is transmitted to the control device 40. Has been entered.

  When connecting the planting depth sensor 91 to the bracket 69b of the support frame 69, as shown in FIG. 8, a positioning pin 92 is inserted in advance between the support frame 69 and the operation arm 90, and the driven gear 86 and The operation arm 90 is temporarily fixed at a predetermined position. Thus, the planting depth sensor 91 can be accurately connected to the bracket 69b of the support frame 69. After connecting the planting depth sensor 91, the positioning pin 92 is removed.

  In this case, a mark is engraved on the support frame 69, the driven gear 86, and the operation arm 90 instead of the positioning pin 92, and the driven gear 86 and the operation arm 90 are temporarily fixed at predetermined positions in accordance with the mark, and the support frame The planting depth sensor 91 may be connected to the 69 bracket 69b.

[14]
Next, the structure related to the height sensor 68 in the elevation control unit 73 of the seedling planting apparatus 5 will be described.

  As shown in FIG. 9, a bracket 93 is connected to a portion of the support frame 18 near the operation arm 90. As shown in FIGS. 10 and 11, the upper and lower middle portions of the balance-shaped support link 94 are swingably supported around the horizontal axis P9 in the left and right direction at the lower front part of the bracket 93, and the support link 95. Are swingably supported around a horizontal axis P10 in the left-right direction at the upper rear portion of the bracket 93.

  As shown in FIGS. 10 and 11, a sensor support 96 is connected across support links 94 and 95, and the sensor support 96 is supported movably up and down. A link 97 is connected between the lower part of the support link 94 and the front part of the operation arm 90, and the vertical position of the sensor support 96 is determined.

As shown in FIGS. 10, 11, and 12, the height sensor 68 is connected to the sensor support 96, and the detection value of the height sensor 68 is input to the control device 40. A rod 98 is connected to the detection arm 68 a of 68 and the front part of the center float 9.
As shown in FIGS. 4, 5, and 6, in the leveling device 53, a bending portion 67 a that is bent so as to protrude forward is provided at a central portion of the support frame 67. The inside of the portion 67a is arranged in the up-down direction.

As shown in FIGS. 10 and 11, a support arm 96 a is attached to the upper portion of the sensor support 96 so as to be able to change its position around a horizontal axis P11 in the left-right direction. A spring 99 is connected between the support arm 96a of the sensor support 96 and the detection arm 68a of the height sensor 68, and the center float 9 is urged downward by the spring 99.
In this case, the urging force of the spring 99 can be adjusted by changing the position of the support arm 96a of the sensor support 96 along the direction of the spring 99.

  As shown in FIGS. 10 and 11, a spring 96 is provided on the bracket 96 b above the sensor support 96 so that the receiving rod 100 is movably supported in the up-down direction and receives upward movement of the receiving rod 100. ing. As a result, when the center float 9 swings largely upward, the upward swing of the detection arm 68 a of the height sensor 68 is received by the receiving rod 100.

[15]
Next, the arrangement of the support frame 69, the electric motor 70, the speed reduction mechanism 84 and the driven gear 86, the planting depth sensor 91, and the height sensor 68 in the structure described in the above items [13] and [14] will be described.

  As shown in FIGS. 2, 8, and 9, between the link mechanism 3 (vertical link 3c) and the center support frame 26, the support frame 69, the electric motor 70, the speed reduction mechanism 84 and the driven gear 86, the planting depth are provided. A sensor 91 and a height sensor 68 are arranged.

Thereby, the electric motor 70, the reduction mechanism 84, the driven gear 86, the planting depth sensor 91, and the height sensor 68 are arranged near the left and right central portions of the seedling planting device 5 in plan view and front view. It becomes.
In a plan view and a front view, the electric motor 70, the speed reduction mechanism 84 and the driven gear 86, the planting depth sensor 91 and the height sensor 68 are provided between the left and right central portions of the seedling planting apparatus 5 and the auxiliary rear wheel 2a. It will be in the state of arrangement.
A part of the link mechanism 3 that connects the electric motor 70, the speed reduction mechanism 84 and the driven gear 86, the planting depth sensor 91, and the height sensor 68 to the left and right central portions of the seedling planting device 5 in plan view and front view. In the vicinity.
In plan view and front view, the electric motor 70, the speed reduction mechanism 84 and the driven gear 86, the planting depth sensor 91 and the height sensor 68 are assisted by the link mechanism 3 connected to the left and right central portions of the seedling planting apparatus 5. It is in a state of being arranged between the rear wheel 2a.

As shown in FIG. 8, the planting transmission case 6 that rotatably supports the planting arm 8 at the rear is disposed along the front-rear direction in the seedling planting device 5 in a side view. The lower part (guide rail 38) of the seedling rest 10 is arranged in the front part of the planting arm 8, and the seedling rest 10 extends obliquely forward and upward.
A wedge-shaped space is formed between the imaginary line L1 extending forward along the planting transmission case 6 and the seedling rest 10 in a side view. The motor 70, the speed reduction mechanism 84 and the driven gear 86, the planting depth sensor 91, and the height sensor 68 are arranged.

As shown in FIG. 8, an electric motor 70 and a reduction mechanism 84 (pinion gear 84a) are arranged in front of a driven gear 86, which is a sector gear, in a side view.
In a side view, a virtual line L3 connecting the horizontal axis P8 of the driven gear 86 and the rotation axis of the pinion gear 84a of the speed reduction mechanism 84 is slightly lower than the direction in which the seedling rest 10 extends forward and upward. Thus, the seedling stand 10 extends in the forward and upward extending direction.
In this case, since the direction of the center position of the vertical swing range of the driven gear 86 is the imaginary line L3, the direction of the center position of the vertical swing range of the driven gear 86 is directed upward and forward of the seedling rest 10. It is in a state slightly downward from the extending direction.

[16]
Next, the support frame 13, the electric motor 14, the reduction mechanism 15 and the driven gear 16, the seedling picking sensor 44 according to the above item [4], the support frame 69, the electric motor 70 according to the above items [13] and [14], About arrangement | positioning of the reduction mechanism 84 and the driven gear 86, the planting depth sensor 91 and the height sensor 68, and the support frame 52, the electric motor 56, the reduction mechanism 55, the driven gear 54, and the connection member 58 as described in the above [10]. explain.

  As shown in FIGS. 2, 4, and 9, between the link mechanism 3 (vertical link 3c) and the left auxiliary rear wheel 2a in a plan view and a front view, the support frame 52, the electric motor 56, the speed reduction mechanism 55, The driven gear 54 and the connecting member 58 are arranged.

Thus, near the link mechanism 3 (longitudinal link 3c) near the link mechanism 3 connected to the seedling planting apparatus 5, the support frame 13, the electric motor 14, the speed reduction mechanism 15, the driven gear 16, The take-up amount sensor 44 is arranged, and the support frame 69, the electric motor 70, the reduction mechanism 84 and the driven gear 86, the planting depth sensor 91, and the height sensor 68 are arranged.
On the left side of the link mechanism 3 (the vertical link 3c), a support frame 52, an electric motor 56, a speed reduction mechanism 55, a driven gear 54, and a connection member 58 are arranged.

[17]
Next, in the structure described in [13] or [14], the position of the support arm 41a (center float 9 and side float 11) of the support shaft 41 (horizontal axis core P5) with respect to the seedling planting apparatus 5 is changed up and down. The state performed is described.

  As shown in FIGS. 8 and 12, when the driven gear 86 is driven to swing downward by the electric motor 70 and the speed reduction mechanism 84 (the pinion gear 84a of the speed reduction mechanism 84 is driven to rotate counterclockwise in FIG. 8). In this state, the gear teeth of the driven gear 86 are pushed downward), the operation arm 90 is operated forward, and the support arm 41a of the support shaft 41 is operated upward.

Accordingly, as shown in FIGS. 8 and 12, the center float 9 and the side float 11 (horizontal axis P5) are moved by the support arm 41a of the support shaft 41 against the weight of the center float 9 and the side float 11. Operated on the ascending side.
In this case, as shown in FIGS. 10 and 11, the sensor support 96 is also moved upward by the link 97 in conjunction with the upward movement of the support arm 41a of the support shaft 41. The vertical distance between the sensor and the height sensor 68 is maintained at a constant value without change.

  As shown in FIGS. 8 and 12, when the driven gear 86 is driven to swing upward by the electric motor 70 and the reduction mechanism 84 (the pinion gear 84a of the reduction mechanism 84 is driven to rotate clockwise in FIG. The state in which the center float 9 and the side float 11 are moved away from the gear teeth of the gear 86), whereby the support arm 41a of the support shaft 41 is operated downward.

Thus, as shown in FIGS. 8 and 12, the center float 9 and the side float 11 (horizontal axis P5) are moved downward by the weight of the center float 9 and the side float 11.
In this case, as shown in FIGS. 10 and 11, in conjunction with the operation of the support shaft 41 to the lower side of the support arm 41a, the sensor support 96 is also operated downward by the link 97, so that the center float is provided. The vertical interval between 9 and the height sensor 68 is maintained at a constant value without change.

[18]
Next, the operation of the elevation control unit 73 of the seedling planting apparatus 5 will be described.

  As shown in FIG. 12, the height from the center float 9 (the rice field surface G) to the seedling planting apparatus 5 becomes the set height A1 (set depth), and becomes the planting depth of the seedling by the planting arm 8. Thus, as described in the preceding section [17], when the positions of the center float 9 and the side float 11 (horizontal axis P5) with respect to the seedling planting apparatus 5 are changed to the upper side and the lower side, the set height A1 (set depth) ) Will be changed.

  As described in [13] above, by detecting the angle of the driven gear 86 by the planting depth sensor 91, the positions of the center float 9 and the side float 11 (horizontal axis P5) with respect to the seedling planting device 5 are determined. It can be detected, and the set height A1 (set depth) can be detected.

As described above, the positions of the center float 9 and the side float 11 (horizontal axis P5) with respect to the seedling planting apparatus 5 are changed to the ascending side and the descending side, and the set height A1 (set depth) is changed. Also, as described in [17] above, the vertical interval between the center float 9 and the height sensor 68 is maintained at a constant value without change.
As a result, the detection value of the height sensor 68 deviates from the planting set value B1 corresponding to the above-described constant value, and the seedling planting apparatus 5 rises (falls) with respect to the center float 9 that follows the ground surface G on the rice field G. (That the seedling planting apparatus 5 has risen (down) with respect to the set height A1 (set depth)) is detected.

As shown in FIG. 12, the planting depth control unit 103 as software is provided in the control device 40.
Thereby, as described in [19] described later, when the set height A1 (set depth) is set, an operation command is output from the control device 40 (planting depth control unit 103) to the electric motor 70. Then, the center float 9 and the side floats 11 (horizontal axis core P5) for the seedling planting apparatus 5 as described above so that the detection value of the planting depth sensor 91 becomes the set height A1 (set depth). Is changed to the upper side and the lower side.

  As shown in FIG. 12, while the center float 9 follows the ground surface G while the seedling planting apparatus 5 moves up and down, the seedling planting apparatus 5 moves from the rice field G (center float 9) to the seedling planting apparatus 5 accordingly. (The planting depth of the seedling by the planting arm 8) is about to change. As a result, the height from the rice field G (center float 9) to the seedling planting device 5 (the planting depth of the seedling by the planting arm 8) is detected by the height sensor 68, and the planting set value B1 and The difference from the detected value of the height sensor 68 is detected.

  As a result, as shown in FIG. 12, the difference between the planting set value B1 and the detected value of the height sensor 68 is eliminated, and the control device is set so that the detected value of the height sensor 68 becomes the planted set value B1. An operation command is output from the 40 (elevation control unit 73) to the control valve 71, the hydraulic cylinder 4 is extended and contracted to move the seedling planting device 5 up and down, and the seedling planting device 5 (planting arm 8) operates. The planting depth of the seedlings is maintained at the set depth (the height from the rice field G (center float 9) to the seedling planting device 5 (the planting depth of the seedlings by the planting arm 8) is the set height. A1 (set depth).

[19]
Next, the setting of the set seedling collection amount (see the previous section [6]) and the set height A1 (set depth) (see the previous section [18]) will be described.

  As shown in FIG. 12, the riding type rice transplanter is equipped with a smartphone 104, and is provided with a Wi-Fi unit 105. The smartphone 104 and the Wi-Fi unit 105 are configured to wirelessly communicate with each other according to the Wi-Fi standard, and the Wi-Fi unit 105 and the control device 40 are connected by a CAN. The smartphone 104 and the external computer 106 communicate with each other by wireless data communication via the Internet.

  As a result, as shown in FIG. 12, when starting the planting operation in one day, the field data regarding the position of the field where the planting operation is performed first is transmitted from the computer 106 to the smartphone 104. The driver displays the received field data on the smartphone 104 and moves the riding rice transplanter to a target field while visually checking the displayed field data.

  As shown in FIG. 12, when the user arrives at the target field, various work data in the target field is transmitted from the computer 106 to the smartphone 104. Among the work data received by the smartphone 104, the set seedling collection amount and the set height A1 (set depth) are transmitted from the smartphone 104 to the Wi-Fi unit 105, and transmitted from the Wi-Fi unit 105 to the control device 40. Can be

As shown in FIG. 12, when the control unit 40 receives the set amount of seedlings, the control device 40 (seeding amount control unit 102) outputs an operation command to the electric motor 14 as described in [6]. Then, the support arm 12a of the support shaft 12 (the seedling rest 10 and the guide rail 38 (the seedling takeout opening 38a)) is positioned upward so that the detection value (the seedling removal amount) of the seedling removal sensor 44 becomes the set seedling removal amount. And operated downward.
At the same time, the value detected by the seedling picking sensor 44 (the amount of seedling picking) is transmitted from the control device 40 to the computer 106 via the Wi-Fi unit 105 and the smartphone 104.

In this case, the operating speed of the electric motor 14 to the ascending side of the seedling rest 10 and the guide rail 38 (the seedling takeout opening 38a) is lower than the operating speed of the electric motor 14 to the descending side of the seedling rest 10 and the guide rail 38 (the seedling takeout opening 38a). The operating speed of the electric motor 14 is set to a low speed.
When the electric motor 14 operates on the ascending side of the seedling rest 10 and the guide rail 38 (seedling take-out opening 38a), the seedling rest 10 and the guide rail 38 (seedling) exceed the dead zone for the set seedling collection amount (target value). When the electric motor 14 operates on the descending side of the take-out opening 38a), the dead zone for the set seedling collection amount (target value) is set to be narrow.

As shown in FIG. 12, when the control device 40 receives the set height A1 (set depth), the control device 40 (planting depth control unit 103) receives the set height A1 (set depth) as described in [17] and [18]. An operation command is output to the electric motor 70, and the center float 9 and the side float 11 (sideways) for the seedling planting apparatus 5 are set so that the detection value of the planting depth sensor 91 becomes the set height A1 (set depth). The position of the shaft center P5) is changed to the upper side and the lower side.
At the same time, the detection value of the planting depth sensor 91 is transmitted from the control device 40 to the computer 106 via the Wi-Fi unit 105 and the smartphone 104.

In this case, the electric motor 70 on the lower side of the center float 9 and the side float 11 (horizontal axis P5) is lower than the operating speed of the electric motor 70 on the upper side of the center float 9 and the side float 11 (horizontal axis P5). The operating speed of 70 is set to low speed.
When the electric motor 70 operates on the ascending side of the center float 9 and the side float 11 (horizontal axis P5), the center float 9 and the side float are more than the dead zone for the set height A1 (set depth) (target value). When the electric motor 70 operates on the descending side of 11 (horizontal axis P5), the dead zone for the set height A1 (set depth) (target value) is set to be narrow.

As shown in FIGS. 7 and 8, the outer diameter of the pinion gear 15 a of the reduction mechanism 15 and the outer diameter of the pinion gear 84 a of the reduction mechanism 84 are set to be the same, while the outer diameter of the driven gear 16 is The outer diameter of the driven gear 86 is set larger than that of the driven gear 86.
Thus, the reduction rate from the electric motor 70 to the driven gear 86 is set to be larger than the reduction rate from the electric motor 14 to the driven gear 16.

[20]
Next, a manual change of the set seedling collection amount and the set height A1 (set depth) set as described in the preceding section [19] will be described.

  As shown in FIGS. 1, 2, and 12, a manual operation switch type (dial operation switch type) seedling collection amount setting unit 108 and a planting depth setting are provided near a steering handle 107 for performing a steering operation of the front wheel 1. The operation position of the seedling collection amount setting unit 108 and the planting depth setting unit 109 is input to the control device 40.

  In one field, the set seedling collection amount and the set height A1 (set depth) are set as described in the preceding section [19], and after the planting operation is started, the set seedling collection amount and the set height are set. When the driver determines that it is preferable to change A1 (set depth), the driver operates the seedling collection amount setting unit 108 and the planting depth setting unit 109.

As a result, the control unit 40 sets the seedling collection amount to a value corresponding to the operation position of the seedling collection setting unit 108 in preference to the set seedling collection amount set as described in [19]. An operation command is output from the (seedling harvesting control unit 102) to the electric motor 14, and the set seedling harvesting is changed.
Prior to the set height A1 (set depth) set as described in [19], the set height A1 (set depth) is a value corresponding to the operation position of the planting depth setting unit 109. Then, an operation command is output from the control device 40 (planting depth control unit 103) to the electric motor 70, and the set height A1 (set depth) is changed.

  At the same time, the detection value of the seedling collection sensor 44 (the seedling collection amount) and the detection value of the planting depth sensor 91 are transmitted from the control device 40 to the computer 106 via the Wi-Fi unit 105 and the smartphone 104. You.

When the planting operation of one field is completed as described above, the field data relating to the position of the field where the next planting operation is to be performed is transmitted from the computer 106 to the smartphone 104. Move the rice transplanter.
When the vehicle arrives at the target field, various types of work data in the target field are transmitted from the computer 106 to the smartphone 104 as described in the previous section [19]. The amount and the set height A1 (set depth) are received, and the setting of the set seedling collection amount and the set height A1 (set depth) by the electric motors 14 and 70 is newly performed.

[21]
Next, adjustment of the height of the ground leveling device 53 will be described.

As shown in FIG. 12, a push button type upper switch 110, a lower switch 111, and an up switch 112 are provided below the steering handle 107, and operation signals of the upper switch 110, the lower switch 111, and the up switch 112 are provided. Is input to the control device 40.
When the leveling device 53 is located at the work position A3, the upper and lower switches 110 and 111 are used to set a leveling setting height A2 (leveling depth) from the rice field G to the leveling device 53 (drive shaft 61). ) Is set and changed.

FIG. 12 shows a state where the leveling set height A2 (leveling depth) is set to the standard height in a state where the leveling device 53 is located at the work position A3.
When the upper switch 110 is pressed once, the leveling set height A2 (leveling depth) is changed slightly upward (the side of the leveling depth shallower), and when the lower switch 111 is pressed once, the leveling set height A2 ( The leveling depth is changed slightly downward (the deeper the leveling). By pressing and operating the upper and lower switches 110 and 111, the leveling set height A2 (leveling depth) is set in a plurality of steps (for example, a plurality of levels on the shallow side and the deep side of the leveling depth across the standard height). can do.
When the up and down switches 110 and 111 are simultaneously pressed while the leveling set height A2 (leveling depth) is set to a height other than the standard height, the leveling set height A2 (leveling depth) is set. Automatically changes to standard height.

  As described in the preceding paragraphs [19] and [20], when the set height A1 (set depth) is changed (changed), the leveling device 53 is supported by the seedling planting device 5, and thus the leveling device is set. 53 rises and descends from the leveling set height A2 (leveling depth), and based on the detection values of the height sensor 74 and the planting depth sensor 91, the leveling device 53 sets the leveling set height A2 as described below. Go up and down to return to (leveling depth).

  As shown in FIG. 12, in a state where the leveling set height A2 (leveling depth) is set to the standard height (a state where the leveling device 53 is located at the leveling set height A2 (leveling depth)), When the set height A1 (set depth) is changed to the lower side (the deeper side of the planting depth of the seedlings by the planting arm 8), the leveling device 53 moves downward from the leveling set height A2 (leveling depth). (To the deeper side of the leveling depth). As a result, the leveling device 53 rises and returns to the leveling set height A2 (leveling depth) by the amount that the seedling planting device 5 is lowered.

  As shown in FIG. 12, in a state where the leveling set height A2 (leveling depth) is set to the standard height (a state where the leveling device 53 is located at the leveling set height A2 (leveling depth)), When the set height A1 (set depth) is changed to the upper side (shallow side of the planting depth of the seedling by the planting arm 8), the ground leveling device 53 moves upward (from the ground level set height A2 (land level depth)). (Shallow side of leveling depth). As a result, the leveling device 53 descends and returns to the leveling set height A2 (leveling depth) as much as the seedling planting device 5 rises.

As shown in FIG. 12, in a state where the leveling device 53 is located at the working position A3 (setting level A2 (leveling depth)), when the raising switch 112 is pressed, the leveling device 53 is moved to the non-working position A4. To rise.
When the raising switch 112 is pressed while the leveling device 53 is located at the non-working position A4, the leveling device 53 is moved to the working position A3 (the leveling setting height A2 (the leveling depth immediately before rising to the non-working position A4). )).

[First Embodiment of the Invention]
In the configuration described in the above items [4] and [6], a spring (driven) for urging the driven gear 16 such that the driven gear 16 rotates on the descending side of the seedling rest 10 and the guide rail 38 (the seedling take-out opening 38a). A spring for urging the gear 16 in the counterclockwise direction in FIG. 7 (not shown) (corresponding to an urging mechanism) may be provided.

  As a result, as shown in FIG. 7, the pinion gear 15a of the speed reduction mechanism 15 is driven to rotate clockwise in FIG. 7, so that the gear teeth of the pinion gear 15a of the speed reduction mechanism 15 move upward from the gear teeth of the driven gear 16. In this case, the weight of the seedling rest 10 (the seedling placed on the seedling rest 10) is subjected to the urging force of the spring, so that the gear teeth of the pinion gear 15 a of the speed reduction mechanism 15 are driven by the gears of the driven gear 16. The driven gear 16 rotates in a counterclockwise direction on the paper surface of FIG.

  As shown in FIG. 7, when the driven gear 16 rotates without delay, the gear teeth of the pinion gear 15a of the speed reduction mechanism 15 are slightly separated from the gear teeth of the driven gear 16, and thereafter the driven gear 16 rotates. Therefore, it is possible to avoid a situation in which the gear teeth of the driven gear 16 catch up with and collide with the gear teeth of the pinion gear 15a of the reduction mechanism 15, and the gear teeth of the driven gear 16 and the pinion gear 15a of the reduction mechanism 15 The collision sound due to the collision can be suppressed.

[Second Alternative Embodiment of the Invention]
In the configuration described in the above paragraphs [13] and [17], a spring (driven gear) for urging the driven gear 86 so that the driven gear 86 rotates on the lower side of the center float 9 and the side float 11 (horizontal axis core P5). A spring (not shown) (corresponding to an urging mechanism) that urges 86 in the counterclockwise direction in FIG. 8 may be provided.

  As a result, as shown in FIG. 8, the pinion gear 84a of the speed reduction mechanism 84 is driven to rotate clockwise in FIG. 8, and the gear teeth of the pinion gear 84a of the speed reduction mechanism 84 are separated upward from the gear teeth of the driven gear 86. In this case, the biasing force of the spring is applied to the weights of the center float 9 and the side float 11, so that the gear teeth of the pinion gear 84a of the reduction mechanism 84 do not separate from the gear teeth of the driven gear 86. 86 rotates in the counterclockwise direction in FIG.

  As shown in FIG. 8, when the driven gear 86 rotates without delay, the gear teeth of the pinion gear 84a of the reduction mechanism 84 are slightly separated from the gear teeth of the driven gear 86, and then the driven gear 86 rotates. Therefore, it is possible to avoid a situation in which the gear teeth of the driven gear 86 catch up with and collide with the gear teeth of the pinion gear 84a of the reduction mechanism 84, and the gear teeth of the driven gear 86 and the pinion gear 84a of the reduction mechanism 84 The collision sound due to the collision can be suppressed.

[Third Alternative Embodiment of the Invention]
In the configuration described in the above items [4] and [6], a spring may be provided for urging the seedling mounting table 10 and the guide rail 38 (the seedling removal port 38a) to the rising side.
In the configuration described in the above paragraphs [13] and [17], a spring may be provided to bias the center float 9 and the side float 11 (horizontal axis core P5) upward.

[Fourth alternative embodiment of the invention]
In the configuration described in the above [16], a central support frame 26 is disposed on the left side of the link mechanism 3 (vertical link 3c), and the support frame 13, the electric motor 14, the speed reduction mechanism 15, the driven gear 16, The quantity sensor 44 may be provided, and the support frame 69, the electric motor 70, the reduction mechanism 84 and the driven gear 86, the planting depth sensor 91, and the height sensor 68 may be provided.
In the case of the above-described configuration, the support frame 52, the electric motor 56, the reduction mechanism 55, the driven gear 54, and the connecting member 58 are disposed on the right side of the link mechanism 3 (the vertical link 3c).

[Fifth Alternative Embodiment of the Invention]
In the configuration described in the above [16] and the aforementioned [fourth embodiment of the present invention], a support is provided between the link mechanism 3 (vertical link 3c) and the center support frame 26 in plan view and front view. The frame 13, the electric motor 14, the reduction mechanism 15, the driven gear 16, and the seedling picking sensor 44 may be provided.
When configured as described above, the support frame 69, the electric motor 70, the reduction mechanism 84 and the driven gear 86, the planting depth are provided between the auxiliary rear wheel 2a and the center support frame 26 in plan view and front view. The sensor 91 and the height sensor 68 are arranged.

  In the configuration described in the above item [16] and the aforementioned [fourth embodiment of the present invention], a support is provided between the link mechanism 3 (vertical link 3c) and the center support frame 26 in plan view and front view. The frame 13, the electric motor 14, the speed reduction mechanism 15, the driven gear 16, and the seedling picking sensor 44 are arranged. The support frame 69, the electric motor 70, the speed reduction mechanism 84, the driven gear 86, the planting depth sensor 91, and the height sensor. 68 may be arranged.

  In the configuration described in the above [16] and the aforementioned [fourth embodiment of the present invention], the support frame 13 and the electric motor are disposed between the center support frame 26 and the auxiliary rear wheel 2a in plan view and front view. The motor 14, the reduction mechanism 15, the driven gear 16, and the seedling picking sensor 44 are arranged. The support frame 69, the electric motor 70, the reduction mechanism 84, the driven gear 86, the planting depth sensor 91, and the height sensor 68 are arranged. You may.

[Sixth Alternative Embodiment of the Invention]
In the configuration described in [16], the feed mechanism 17 is not disposed at the connection position between the link mechanism 3 (vertical link 3c) and the seedling planting apparatus 5, but the link mechanism 3 (vertical link 3c) and the seedling The support frame 13, the electric motor 14, the reduction mechanism 15 and the driven gear 16, and the seedling picking sensor 44 are disposed at the connection position with the attachment device 5, and the support frame 69, the electric motor 70, the reduction mechanism 84 and the driven gear 86, The planting depth sensor 91 and the height sensor 68 may be arranged.
In the case of the above-described configuration, the support frame 52, the electric motor 56, the speed reduction mechanism 55, the driven gear 54, and the connecting member 58 are disposed on the right side (or left side) of the link mechanism 3 (vertical link 3c). The feed case 17 is arranged on the left side (or right side) of the (vertical link 3c).

[Seventh alternative embodiment of the invention]
In the configuration described in the above item [16], the feed case 17 is not disposed at the connecting position between the link mechanism 3 (vertical link 3c) and the seedling planting apparatus 5, but the right side of the link mechanism 3 (vertical link 3c) ( Alternatively, the feed case 17 may be disposed on the left side.
In the case of the above-described configuration, the support frame 13, the electric motor 14, the speed reduction mechanism 15, the driven gear 16, and the seedling picking sensor 44 are disposed on the left side (or right side) of the link mechanism 3 (vertical link 3c). The frame 69, the electric motor 70, the reduction mechanism 84 and the driven gear 86, the planting depth sensor 91 and the height sensor 68 are arranged, and the support frame 52, the electric motor 56, the reduction mechanism 55, the driven gear 54 and the connecting member 58 are connected. Deploy.

[Eighth Alternative Embodiment of the Invention]
The smartphone 104 and the Wi-Fi unit 105 described in [19] above may be eliminated.
When the smartphone 104 and the Wi-Fi unit 105 are abolished, the control device 40 (the seedling collecting amount control unit 102) controls the electric motor so that the set seedling collecting amount becomes a value corresponding to the operation position of the seedling collecting amount setting unit 108. An operation command is output to 14 so that the set seedling collection amount is changed.
In this case, the seedling collecting amount setting unit 108 functions as a seedling collecting sensor that detects the seedling collecting amount set by the electric motor 14.

When the smartphone 104 and the Wi-Fi unit 105 are abolished, the control device 40 (planting depth) is set so that the set height A1 (set depth) becomes a value corresponding to the operation position of the planting depth setting unit 109. The control unit 103) outputs an operation command to the electric motor 70 to change the set height A1 (set depth).
In this case, the planting depth setting unit 109 serves as a planting depth sensor that detects the planting depth set by the electric motor 70.

[Ninth Embodiment of the Invention]
Instead of the electric motors 14 and 70, a hydraulic cylinder or an electric cylinder may be used as the seedling collecting amount actuator and the planting depth actuator.
Instead of transmitting the power of the engine 49 from the seedling planting device 5 to the ground leveling device 53, the power of the engine 49 may be transmitted to the ground leveling device 53 without passing through the seedling planting device 5. .

  The present invention is applicable not only to an 8-row type riding rice transplanter, but also to a 6- or 4-row riding type rice transplanter equipped with a seedling planting apparatus, a riding type rice transplanter not equipped with a leveling device, and a rotating case. The present invention can also be applied to a riding type rice transplanter equipped with a seedling planting device having a crank type planting arm that is not provided.

2 rear wheel 2a auxiliary rear wheel 3 link mechanism
4 Link elevating mechanism 5 Seedling plant 6 Planting transmission case 8 Planting arm
9 Float 10 Seedling rest 12, 12a Position change part 14 Seedling removal actuator, electric motor 15 Reduction mechanism 15a Pinion gear 16 Follower gear, sector gear 38a Seedling take-out port
41a, 41a Supporting member 44 Seedling removal sensor 53 Leveling device 54, 55, 56, 58 Leveling mechanism
68 Height sensor 70 Planting depth actuator , electric motor
73 Elevation control unit
84 Speed reduction mechanism
84a pinion gear
86 driven gear, sector gear
91 Planting depth sensor 102 Seedling amount control unit
103 Planting depth control unit
B1 Planting set value G Field surface L1 Virtual line extending forward along the planting transmission case L2 Virtual line connecting the rotation axis of the driven gear and the rotation axis of the pinion gear.
L3 Virtual line connecting the rotation axis of the driven gear and the rotation axis of the pinion gear
P5 Support shaft center P7 Rotation shaft center
P8 Rotary shaft core

Claims (9)

Equipped with a link mechanism that can swing up and down at the rear of the fuselage, supporting the seedling planting apparatus via the link mechanism so as to be able to move up and down,
A seedling rest driven laterally reciprocatingly in the left-right direction, and a planting arm driven through a certain trajectory, wherein the planting arm passes through a seedling outlet at the lower part of the seedling rest. The seedling planting device is configured to take out a seedling and plant it on the rice field,
A position changing unit that supports the seedling mounting table and the seedling takeout opening so that the position can be changed vertically.
The seedling for changing the seedling picking amount of the seedling that the planting arm takes out through the seedling outlet by operating the position changing unit to change the positions of the seedling rest and the seedling outlet vertically. Take-up actuator,
A seedling harvesting control unit that issues an operation command to the seedling harvesting actuator,
A seedling picking sensor for detecting the seedling picking amount set by the seedling picking actuator,
The seedling picking amount actuator is operated such that the operation speed of the seedling pedestal and the seedling takeout opening on the descending side is lower than the operation speed of the seedling pedestal and the seedling takeout opening on the upside. that riding-type rice planting machine. A planting depth actuator for changing the planting depth of seedlings by the planting arm,
A leveling device that is supported at the front of the seedling planting device via a leveling elevating mechanism so as to be able to move up and down, and leveling the rice field;
The link mechanism is connected to the left and right central portions of the seedling planting device, and the seedling harvesting actuator and the planting depth actuator are provided on one of right and left sides of the link mechanism in the seedling planting device. Arrange them side by side,
The riding type rice transplanter according to claim 1 , wherein the leveling elevating mechanism is arranged at the other part on the right or left side of the link mechanism in the seedling planting device. The riding type rice transplanter according to claim 1 or 2 , wherein the seedling collecting amount actuator is disposed near a left and right central portion of the seedling planting device. Right and left auxiliary rear wheels are provided inside the right and left rear wheels, and the seedling picking actuator is disposed between the left and right central portions of the seedling planting device and the auxiliary rear wheels in plan view. By doing
The riding type rice transplanter according to claim 3 , wherein the seedling collecting amount actuator is arranged near a left and right central portion of the seedling planting device. By providing the right and left auxiliary rear wheels inside the right and left rear wheels, by arranging the seedling removal actuator between the link mechanism and the auxiliary rear wheels in plan view,
The riding type rice transplanter according to claim 3 , wherein the seedling collecting amount actuator is arranged near a portion of the link mechanism connected to the seedling planting device. In a side view, a planting transmission case that supports the planting arm at the rear is arranged along the front-rear direction, and a lower portion of the seedling rest is arranged at a front portion of the planting arm in the planting transmission case. And extending the seedling rest diagonally forward and upward to constitute the seedling planting apparatus,
In side view, between the seedling platform and a virtual line that extends forwardly along the planting transmission case, any one of claims 1 to 5, arranged said seedling taking quantity actuator A riding rice transplanter according to one of the above. The seedling removal actuator is an electric motor,
A reduction mechanism that reduces the rotational power of the electric motor to rotationally drive a pinion gear, and a driven gear that has a larger diameter than the pinion gear and meshes with the pinion gear,
The riding rice transplanter according to any one of claims 1 to 6 , wherein the driven gear operates the position changing unit. In a side view, a planting transmission case that supports the planting arm at the rear is arranged along the front-rear direction, and a lower portion of the seedling rest is arranged at a front portion of the planting arm in the planting transmission case. And extending the seedling rest diagonally forward and upward to constitute the seedling planting apparatus,
The driven gear is a sector gear that extends forward from the left-right rotation axis, and the electric motor, the reduction mechanism, and the pinion gear are disposed in front of the driven gear, and the driven gear and the pinion gear are Is configured to rock the driven gear up and down by being engaged,
In a side view, between the imaginary line extended forward along the planting transmission case and the seedling rest, the driven gear, the electric motor, the reduction mechanism and the pinion gear are arranged,
The riding rice transplant according to claim 7 , wherein a virtual line connecting a rotation axis of the driven gear and a rotation axis of the pinion gear extends along a direction in which the seedling rest extends forward and upward in a side view. Machine. 9. The riding rice transplanter according to claim 7 , further comprising an urging mechanism that urges the driven gear on a lower side of the seedling mounting table and the seedling outlet. 9.

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