JP2005333825A - Rice transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rice transplanter solving the problem involved in conventional rice transplanters that, in a condition that a planting section is at the uppermost position (the highest position in its lift operation), there is no function of lowering the planting section to a preset position and automatically stopping it, therefore in stopping the planting section at a position easy to make a seedling relaying operation from a seat side in a condition that the planting section is at the uppermost position, a relevant user cannot properly deal with the task even if the user makes an operation using a lift lever. <P>SOLUTION: The rice transplanter is equipped with a lift-controllable planting section 4 for planting seedlings in a farm and a means (seedling relay SW64) for lifting the planting section 4 in contact with the farm to a preset predetermined height and automatically stopping it. This rice transplanter works as follows: When the means (seedling relay SW64) is operated in a condition that the planting section 4 is at a position higher than the predetermined position, the planting section 4 is lowered to the predetermined height and stopped automatically. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rice transplanter having a planting unit for planting seedlings in a field, and more particularly to raising and lowering control of a planting unit.

Conventionally, in a rice transplanter having a planting unit for planting seedlings in a field, there is a rice transplanter that can automatically move the planting unit up and down according to a predetermined situation.
As a specific example of the predetermined situation, for example, a rice transplanter may be moved backward.
In this case, if the shifting lever is shifted to the reverse side while the planting part is lowered, the planting part may be damaged due to contact with a hook or the like during reverse travel. .
In such a control, the control unit of the rice transplanter machine detects a user operation (operation of the main shift lever) with a sensor or the like, and the control unit controls the raising and lowering of the planting unit according to the detection result. This is done by issuing a command to the lift drive mechanism.
Of course, in the conventional rice transplanter as described above, the user can manually raise and lower the planting part.
In this case, in the case of a riding rice transplanter, this is performed by operating a steering handle or a lifting lever for lifting of a planting part provided around the seat.
Thereby, the user can perform the raising / lowering operation of the planting part manually when desired.
Examples of such rice transplanters include those shown in Patent Documents 1 and 2 below.

Japanese Unexamined Patent Publication No. 2000-175520 JP-A-8-154436

By the way, there is a case where an operation of replenishing seedlings to the planting part (so-called seedling joining operation) is performed.
In such a seedling joining operation, seedlings are generally replenished from the seating side of the rice transplanter to the planting part located behind the rice transplanter.
Therefore, at the time of such seedling joining work, it is necessary to raise the planting part to some extent so that the seedling can be easily supplied from the seat side to the planting part.
The conventional rice transplanter raises and lowers the planting part when the main transmission lever is operated or when the elevating lever or the like is manually operated by the user.
Therefore, for example, the user has to stop the planting unit at a desired position by operating the lifting lever while viewing the planting unit behind the rice transplanter.
However, even if the position of the planting part is determined by such a method, it has been difficult to stop at a position where it is easy to actually replenish seedlings from the seat side to the planting part.
Conventionally, there has been a rice transplanter that raises a planting unit from a state in which the planting unit is grounded to a farm to a preset height.
However, in the state where the planting part is at the uppermost position (the highest position in the raising / lowering operation), there is no function of automatically lowering the planting part to a preset position and stopping it.
Therefore, when the planting part is in the uppermost position (the highest position in the raising / lowering operation), when the planting part is stopped at a position where it is easy to perform the seeding work from the seat side, the user uses the lifting lever. There was a problem that even if the work was done, the process could not work well.
Then, this invention is made | formed in view of the said situation, The place made into the objective is, for example, the rice transplanter which stops a planting part in the position which a user desires from the state in which a planting part is in a high position. Is to provide.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  In Claim 1, the raising / lowering operation is possible, the planting part for planting a seedling in a farm field, and the said planting part which is earth | grounded to the farm field are raised to predetermined height, and are stopped automatically. In the rice transplanter equipped with the stopping means for, when the stopping means is operated in a state where the planting part is at a position higher than the predetermined height, the planting part is moved to the predetermined height. It is lowered and automatically stopped.

  In Claim 2, when the said stop means is operated again in the state which the said planting part has stopped at the said predetermined height by the said stop means, it has stopped at the said predetermined height. The state is released.

  In Claim 3, the state which has stopped the said planting part at the said predetermined height, the clutch which switches the operation state of the planting nail | claw provided in the said planting part is on, and the vehicle speed of the said rice transplanter When the vehicle is in a state where the vehicle speed exceeds a predetermined vehicle speed, a warning means is used to alert the outside to that effect.

  In Claim 4, the state which has stopped the said planting part at the said predetermined height, the clutch which switches the operation state of the planting nail | claw provided in the said planting part is on, and the vehicle speed of the said rice transplanter The alarm means is alarmed on the basis of audio data that is used only when becomes a state of a predetermined vehicle speed or higher.

  As effects of the present invention, the following effects can be obtained.

According to the configuration of claim 1, when the planting unit is at a position higher than a predetermined position (for example, when the planting unit is at the uppermost position), the operator operates the stopping unit. It is possible to automatically stop the planting part by lowering it to a position where it is easy to perform seedling joining work.
Therefore, it is possible to quickly stop the planting part at a predetermined height not only from the state during the conventional planting work but also from the state where the work is paused with the planting part raised to the uppermost position. It becomes.
That is, it is possible to quickly perform seedling work from a state where the work has been paused, or to confirm the rearward when moving backward.

According to the configuration of the second aspect, by configuring in this way, it becomes possible to easily return the height of the planting part to the original state only by the switch operation.
Therefore, it becomes possible to quickly return the planting part to the original position before performing the seedling joining operation after the seedling joining operation.

  According to the configuration of claim 3, it is possible to prevent a state where the seedling is released into the air with the planting claw activated by performing an alarm using such an alarm means, and the planting unit It is possible to notify the operator that planting of seedlings is started after the state (seedling joining mode) is stopped at a predetermined height.

According to the configuration of claim 4, according to this, according to the sound that is alarmed by the alarm means, is the situation where the abnormality currently occurring is such that the seedling as described above is released into the air? It is possible to easily determine whether or not.
Therefore, even if an operator performs an inappropriate operation such as planting a seedling while the planting part is stopped at a predetermined height (seedling mode) and is not released, a warning is issued. Because of the warning sound generated by the means, it is possible to notify the operator that it is inappropriate.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the accompanying drawings for understanding of the present invention. The following best mode for carrying out the present invention is an example embodying the present invention, and is not intended to limit the technical scope of the present invention.
1 is a schematic configuration diagram showing the appearance of a riding rice transplanter according to the best mode for carrying out the present invention, FIG. 2 is a side view of the riding rice transplanter shown in FIG. 1, and FIG. 3 is an operation in the vicinity of the steering handle 14. FIG. 4 is a side view of the schematic configuration diagram of FIG. 3, FIG. 5 is a block diagram relating to lifting control of the planting unit 4, and FIG. 6 is a schematic diagram of control of the riding rice transplanter. FIG. 7 is a flowchart showing an outline of the control of the riding rice transplanter.

<Overall configuration>
First, the whole structure of the rice transplanter which concerns on the best form for implementing this invention is demonstrated using FIG.1 and FIG.2.
The rice transplanter of the present embodiment is, for example, an 8-row riding rice transplanter, and the planting part 4 is mounted on the rear part of the traveling machine body (traveling part) 1 via the lifting link mechanism 27.
In the traveling unit 1, the engine 2 is mounted above the front part of the body frame 3, the front wheel 6 is supported at the front lower part via the front axle case 7a, and the rear wheel 8 is provided at the rear part via the rear axle case 7. I support it.
The engine 2 is covered with a bonnet 9, preliminary seedling platforms 10 and 10 are disposed on both sides of the bonnet 9, and a steering handle 14 is disposed on the dashboard 5 at the rear of the bonnet 9.
Both sides of the bonnet 9 and the rear body frame 3 are covered with a body cover 12.
A seat 13 is disposed at a rear position of the steering handle 14, and both sides of the bonnet 9 and the front portion of the seat 13, both right and left sides of the seat 13, and the rear of the seat 13 are steps.
Further, an eight-way fertilizer applicator 33 is disposed behind the seat 13.

<Planting part 4>
The planting part 4 provided at the rear part of the traveling part 1 is attached to the seedling stage 16, rotary cases 22, 22... Provided at the rear part of the planting transmission case serving as a planting claw support part, and the rotary case 22. Planted claws, a center float 34, a side float 35, and the like.
The seedling stage 16 is disposed in front and rear and low, and the lower part of the seedling stage 16 is supported by the lower guide rail 18 and the upper part of the front surface by the upper guide rail 19 so as to be slidable in the left-right direction.
The lower guide rail 18 and the upper guide rail 19 are supported by a planting center case 20 via a planting frame 23 and the like.
Then, a connecting pipe (not shown) is projected from the planting center case 20 to the left and right sides, a transmission case (not shown) is fixed, the transmission case is projected rearward in parallel, .. Are arranged on both sides of the rear part of the transmission case, and planting claws are provided on the rotary cases 22.
Since one set of the rotary cases 22, 22... Is provided for one seedling mounting table 16, eight rotary cases are provided in the case of the above-mentioned 8 rice transplanters.
Further, the elevating link mechanism 27 is connected to the front portion of the planting center case 20 via a rolling fulcrum shaft, and the elevating link mechanism 27 includes a top link 25, a lower link 26, and the like. The planting part 4 can be moved up and down by a lifting cylinder (not shown; an example of a lifting drive mechanism) composed of a hydraulic cylinder serving as an actuator.

<Float>
A center float 34 and a side float 35 are supported below the planting center case 20 and the planting transmission case connected to the rear portion of the elevating link mechanism 27 via a link mechanism.
An angle sensor 80 for detecting the rotation angle (absolute angle) of the center float 34 (or the side float 35) is disposed in the vicinity thereof via a rotation part or an arm of the link mechanism. As the angle sensor 80, a potentiometer, a rotary encoder, or the like is used.
As an example of the detection means for detecting the angle of the float (relative angle or relative position with the planting part) on the front part of the center float 34 and the support part frame of the planting center case 20 or the planting transmission case. A relative angle sensor 82 is arranged as detection means for controlling the planting depth. As the relative angle sensor 82, a potentiometer, a rotary encoder, or the like is used.
The angle sensor 80 and the relative angle sensor 82 are connected to a control unit 100 to be described later, and are used for raising and lowering the planting unit 4 in accordance with a change in float angle.
Further, markers 40 and 40 are disposed on both the left and right sides of the connecting pipe.
Since the rice transplanter is configured as described above, the seedling mounting table 16 is reciprocated to the left and right as the vehicle travels forward, and the planting claws are driven in synchronism with this reciprocation in each strip. It is possible to cut out the seedlings of the minute and perform the planting work continuously.

<Driver seat>
Although not clearly shown in FIG. 1 and FIG. 2 because of the scale of the drawings, an operating system such as a lever and a switch as shown in FIG. 3 is provided in the vicinity of the dashboard 5 in detail.
Note that FIG. 3 shows a state in which main parts related to the operation system in the vicinity including the dashboard 5 in FIGS. 1 and 2 are extracted, and drawing of parts not related to the operation system is omitted.
On the rear side of the dashboard 5 (the seat 13 side), a steering handle 14 is provided at the center in the left-right direction.
That is, a dashboard 5 and a steering handle 14 are provided on the front side of the seat 13, and electrical operating means (switches) and levers related to planting work of the planting unit 4 are provided near the steering handle 14. Kinds are arranged.
As specific examples of the electric operation means, a planting depth setting SW 61, a field hardness setting SW 62, a work selection SW 63, and a seedling joint SW 64 are arranged (here, “SW” means “switch”). The same shall apply hereinafter.
As the levers, an operation region 90b such as a main transmission lever 94 is provided in the vicinity of the left side of the dashboard 5 with respect to the steering handle 14, and on the other hand, the dashboard 5 In the vicinity of the right side, an operation area 90a such as a cruise control lever 92, an accelerator lever 93, and a lifting lever 91 for manually lifting and lowering the planting unit 4 is provided.
As shown in FIG. 3, the operation areas 90a and 90b are provided with guide grooves 91a, 92a, 93a, and 94a that define the swing ranges and holding positions of the levers.
Further, the operation areas 90a and 90b may be made of a member separated from the dashboard 5 as shown in FIG. 3, or may be formed integrally with the dashboard 5. Good.
A key SW 65 for inputting the start of the engine 2 is provided on the side surface of the seat 13 below the dashboard 5.
The key SW 65 also has a function of turning on a power source for supplying power to a cell motor for starting the engine 2 and a control unit.

<Operation area>
The lifting lever 91 in the operation area 90a will be described with reference to FIG.
As described above, the elevating lever 91 is used to elevate and lower the planting unit 4 by being directly operated manually by a user, and is provided conventionally.
For example, as shown in FIG. 4A, the elevating lever 91 is fixed to a shaft 72a whose swing base is pivotally supported in the operation region 90a, and an arm 71a is fixed to the shaft 72a. ing.
Similarly, further below the shaft 72a and the arm 71a, a shaft 72b that is pivotally supported in parallel with the shaft 72a inside the operation region 90a and an arm 71b fixed to the shaft 72b are provided. A link 74 projects from the shaft 72b.
Further, the end portions of the link 73 are pivotally connected to the end portions of the two arms 71a and 71b, respectively, and the arms 71a and 71b are arranged substantially parallel to form a parallel link.
A rotary SW 70 is provided at an intermediate position in the vertical direction between the arm 71a and the arm 71b.
A substantially U-shaped U-shaped link 70 a is fixed to the rotary shaft of the rotary SW 70.
The end of the link 74 is engaged with the U groove of the U-shaped link 70a, and the end of the link 74 is slidable within the groove of the U-shaped link 70a. .
Since the link 74 slides on the inner surface side of the U-shaped link 70a, the position of the U-shaped link 70a (that is, the angle with respect to the rotary axis) changes, so that the rotary SW 70 rotates. The shaft is configured to rotate.

<Elevating lever 91>
In the configuration as described above, for example, the state of the elevating lever 91 shown in FIG. 4A shows a state pulled to the foremost side (that is, a state pulled to the rear side).
In this state, the position of the U-shaped link 70a fixed to the rotary shaft of the rotary SW 70 is assumed to be the position shown in FIG.
The rotary SW 70 has, for example, four contacts as shown in FIG. 4B, and the contacts corresponding to the four contacts are connected to the control unit 100 (see FIG. 5). Are set in advance as “up”, “neutral”, “down”, and “planting” at the position of the U-shaped link 70a.
Further, since the control unit 100 to be described later is connected to the lifting / lowering cylinder driving unit 200, it is possible to drive the lifting / lowering cylinder (for example, hydraulic type) to drive the planting unit 4 to a desired position. ing.
That is, when the U-shaped link 70a is in the “up” position, the planting portion 4 is raised. When the U-shaped link 70a is in the “neutral” position, the planting portion 4 does not operate and remains in a neutral state. The planting part 4 descends when it is in the position of "planting", and when it is in the "planting" position, the planting clutch of the planting part 4 becomes "ON" and the planting claws are driven to plant seedlings. To start.
Consider the case where the rotary SW 70 is set in advance as described above and the lifting lever 91 is pushed in the direction of the thick arrow (forward direction of the riding rice transplanter) in FIG. 4A in the state shown in FIG.

Note that the thick arrow direction of each part in FIG. 4A indicates the operation direction corresponding to the operation of the lifting lever 91 in the thick arrow direction.
In this case, the arm 71a fixed to the shaft 72a that is the swing base of the lifting lever 91 rotates (in the direction of the thick arrow), so that the link 73 moves (in the direction of the thick arrow). Rotates (in the direction of the thick arrow).
At this time, the link 74 fixed to the shaft 72b slides on the inner surface side (in the groove) of the U-shaped link 70a, so that the rotary shaft of the rotary SW 70 rotates in the direction of the thick arrow.
Therefore, the position of the U-shaped link 70a moves in the order of “up” → “neutral” → “down” → “planting”, and the manual control of the planting unit 4 is switched in this order.
Of course, by operating the lifting lever 91 in the reverse direction, manual control of the planting unit 4 can be switched in the order of “planting” → “down” → “neutral” → “up”.

<Switches>
Here, the planting depth setting SW 61, the field hardness setting SW 62, the work selection SW 63, and the seedling joint SW 64 described above will be described.
The planting depth setting SW 61 is a volume type switch for setting the planting depth when a seedling is planted in the field.
That is, the planting depth setting SW 61 is an example of a planting depth setting unit for setting the planting depth of the planting unit 4.
The volume type switch has a method of adjusting by rotating the switch as shown in FIGS. 3 and 4, and is also called “dial type”. Therefore, here, the description will be made assuming that the volume type includes the meaning of the dial type.
The field hardness setting SW 62 is a volume type switch for setting and inputting control sensitivity and the like based on information such as the field hardness obtained by the user.
That is, in other words, the field hardness setting SW 62 is a degree of sensitivity (elevation to insensitivity) of elevating control when the elevating control is performed on the planting unit 4 based on detection values of sensors such as the angle sensors 80 and 82. Etc. are manually input.
The “float sensitivity” specifically refers to the control target angle of the float. Setting the control target angle of the float to “downward” corresponds to “sensitive”, while the control target angle of the float. Making “going forward” corresponds to “insensitivity”.

The work selection SW 63 is a volume type switch for setting the riding rice transplanter so that the work corresponding to the state of the field can be performed by inputting the state of the field. Specific examples of the field situation include “standard”, “deep water”, and “headland”.
“Standard” means that the riding field transplanter is a standard field that can be performed without executing special control when performing planting work (standard mode).
“Deep water” means that the amount of water (depth) in the field is large compared to the above standard (deep water mode).
“Headland” means that when the amount of water (depth) in the field is small compared to the above standard, or the field condition is poor compared to the central part of the field (there is a lot of unevenness, for example, turning at the field edge) This means the case where there are many irregularities in the farm scene (field surface) due to tires (headland mode).
In addition, the deep mud mode in which mud pushing occurs frequently and the dust mode in which a lot of dredging and foreign substances are floating are conceivable. The target values of planting depth and planting sensitivity according to the situation and state of the field. Can be changed by the work selection SW 63.
When the planting part 4 rises, the seedling joint SW 64 does not raise the planting part 4 to the top so that the seedling can be easily carried out, and the elevation is set at a predetermined height for seedling joint work. It is a switch for automatically stopping the operation, and is a push-type switch for detecting a press by the user.
In this way, by setting only the switch of the seedling SW 64 as a push type different from the other switches, it is possible to alert the user that the seedling SW 64 is the seedling SW 64 and one-touch seedling switching. Since the function activated by the SW 64 can be started, the handling is easy and convenient.
Further, the seedling SW 64 may be provided with a lamp, a light emitting diode, or the like, for example, when the lamp or the light emitting diode shines when operated (pressed) by a user or the like. You may make it notify a user that the planting part 4 is in a stop state with the said predetermined height.

<Control system>
For example, as shown in FIG. 5, the control unit 100 that performs overall control of the riding rice transplanter includes a rotary SW 70, a planting depth setting SW 61, a field hardness setting SW 62, a work selection SW 63, a seedling joint SW 64, a key SW 65, and various types. An angle sensor 80 and a relative angle sensor 82 for detecting an angle change of the sensor 300, the center float 34, and the like, an elevating cylinder driving unit 200 for driving an elevating cylinder that elevates and lowers the planting unit 4, a lamp (monitor lamp) 110, and a traveling unit 1 A vehicle speed sensor 83 or the like for detecting the vehicle speed is connected.
The control unit 100 controls the entire riding rice transplanter based on information acquired from the above-described units (switches, sensors, etc.) and the contents set and stored in advance in the control unit 100.
Further, the control unit 100 is sufficient if it has a function of controlling the entire riding rice transplanter as described above, and therefore may be provided at any place on the riding rice transplanter as long as the function is not restricted. .
Further, a position sensor 81 for detecting information such as the height, expansion and contraction, inclination, etc. of the lifting cylinder may be provided in the lifting cylinder (not shown), the lifting link mechanism 27, the lifting cylinder driving unit 200, and the like.
That is, the position sensor 81 detects information such as the expansion / contraction of the elevating cylinder and the position of the planting part. And the position sensor 81 for detecting the position of the planting part 4 is connected to the control part 100. FIG.
Specific examples of the various sensors 300 include meanings of various sensors such as a tilt sensor for detecting the tilt angle in the front-rear direction of the rice transplanter and a sensor for detecting the engine speed and the like. It is a waste.

<General lifting control of the planting part 4>
Next, an example of the raising / lowering control of the planting part 4 of a riding rice transplanter is demonstrated using the flowchart of FIG. 6, FIG.
In addition, the control subject in the control described below may be the control unit 100 that controls the overall control of the riding rice transplanter, or a dedicated control unit that specializes and controls only the planting unit 4. If provided separately, the dedicated control unit may be used.

Here, it is assumed that the control unit 100 starts the control from the state where the raising / lowering control of the planting unit 4 is not performed after the processing of the start control (step S90) of the riding rice transplanter.
In step S20, the control unit 100 sets the planting clutch in a neutral state in which the planting clutch 4 is not engaged and the planting unit 4 is not lifted or lowered (S20).
That is, this step S20 can be said to be a neutral mode in which the raising / lowering operation of the planting unit 4 is stopped.
In the process of step S20, for example, when the position of the U-shaped link 70a is “down” by operating the lifting lever 91, the process proceeds to step S30, while the position of the U-shaped link 70a is “ In the case of “rising”, the process proceeds to step S10.

In the process of step S10, the control unit 100 raises the planting unit 4 while disengaging the planting clutch (S10).
That is, this step S10 can be said to be an ascending mode for raising the planting part 4.
Moreover, you may call a user's attention by providing the display part etc. which are provided in a riding rice transplanter with the display lamp which displays that it is the said raise mode.
In the process of step S10, the planting unit 4 is determined in advance when “the position of the U-shaped link 70a is“ neutral ”or other switch is pressed” or “the seedling joint SW 64 is pressed”. If it is determined that the predetermined height has been reached, the process proceeds to step S20 to be in a neutral state (ie, stopped).
On the other hand, in the process of step S10, when the position of the U-shaped link 70a is “down”, the process proceeds to step S30.

In the process of step S30, the control unit 100 controls the planting clutch when the planting unit 4 performs the lowering control and the planting clutch is in the disengaged state, and the position of the U-shaped link 70a is “planting”. On the other hand, in the case where the lowering control of the planting part 4 is performed and the planting clutch is in the engaged state, when the position of the U-link 70a becomes “neutral”, the planting clutch is brought into a disconnected state (S30).
That is, this step S30 can be said to be a lowering mode for lowering the planting part 4.
Further, when the lowering control of the planting unit 4 is performed and the planting clutch is in the disengaged state, when the position of the U-shaped link 70a becomes “neutral”, the process proceeds to step S20, while the U-shaped link 70a When the position becomes “rising”, the process proceeds to step S10, and when no operation is performed (via the processing path (1)), the process proceeds to step S40 (see FIG. 7).
Furthermore, when the lowering control of the planting unit 4 is performed and the planting clutch is in the engaged state, when the position of the U-shaped link 70a becomes “up”, the process proceeds to the above step S10, and no operation is performed. The process proceeds to step S40 (see FIG. 7) (via the processing path (2)).

In the process of step S40, the control unit 100 performs the neutral control of the planting unit 4 and enters the planting clutch when the position of the U-shaped link 70a becomes “planting” when the planting clutch is in the disengaged state. On the other hand, when the neutral control of the planting unit 4 is performed and the planting clutch is in the on state, the planting clutch is brought into the disengaged state when the position of the U-link 70a becomes “neutral” (S40).
That is, this step S40 can be said to be a ground contact stop mode in which the planting unit 4 is lowered to the field and stopped by the process of step S30.
Further, when the neutral control of the planting unit 4 is performed and the planting clutch is in the disengaged state, when the position of the U-shaped link 70a becomes “up”, the process proceeds to step S10 (via the processing path (3)). If no operation is performed, the process proceeds to step S50.
Further, when the neutral control of the planting unit 4 is performed and the planting clutch is in the engaged state, when the position of the U-shaped link 70a is “raised”, the process proceeds to step S10 (via the processing path (3)). If no operation is performed, the process proceeds to step S50.
In addition, when nothing is operated in the above (from step S40 to step S50), the vehicle speed of the riding rice transplanter is greater than 0, and the ground contact of the center float 34 is maintained for a certain time.
That is, the riding rice transplanter moves while planting seedlings in the field.

In the process of step S50, the control unit 100 controls the raising / lowering of the planting unit 4 and turns on the planting clutch when the position of the U-shaped link 70a is "planting" when the planting clutch is in the disconnected state. On the other hand, when the raising / lowering control of the planting part 4 is performed and the planting clutch is in the engaged state, when the position of the U-shaped link 70a becomes “neutral”, the planting clutch is brought into the disengaged state (S50).
That is, in this step S50, the height of the planting part 4 that is in contact with the field by the process of step S40 is adjusted to the height of the field (change in the unevenness of the field) that changes as the riding rice transplanter moves. It can be said that it is a lift control mode for performing lift control.
Further, when the raising / lowering control of the planting unit 4 is performed and the planting clutch is in the disengaged state, if the position of the U-shaped link 70a becomes “up”, the process proceeds to step S10 (via the processing path (3)). To do.
Furthermore, when the raising / lowering control of the planting unit 4 is performed and the planting clutch is in the engaged state, if the position of the U-shaped link 70a becomes “up”, the process proceeds to step S10 (via the processing path (3)). Transition.
The passenger rice transplanter can perform the rice transplanting work efficiently by performing the series of processes as described above during normal control.

<Seedling SW64>
The above-described seedling joint SW 64 is basically for automatically stopping after raising the planting unit 4 installed in the farm to a predetermined height.
Thereby, when the seedling joining operation | work was needed during the planting operation | work, it aimed at performing this seedling joining operation | work efficiently.
The following functions may be added to the seedling SW 64.
For example, when the seedling joint SW 64 is operated in a state where the planting unit 4 is at a position higher than a predetermined height, the planting unit 4 is automatically lowered to the predetermined height. The function to be stopped may be further added to the seedling joint SW 64. In other words, the seedling joint SW 64 has the predetermined function when the planting unit 4 is operated in a position higher than a predetermined height. It may be made to function as an example of a stopping means for lowering to the height of and automatically stopping.
In this case, the “predetermined height” is, for example, the height of the planting unit 4 that has been set in advance by the worker or the like for the above-described seedling joining operation, and the control unit 100 or the like as data It will be remembered.
By configuring in this way, in a state where the planting unit 4 is at a position higher than a predetermined position (for example, when the planting unit 4 is at the uppermost position), the worker can set the seedling SW 64. By performing the operation, the planting part 4 can be lowered to a position where it is easy to carry out the seedling joining operation and automatically stopped.
Therefore, not only the state during the conventional planting operation, but also the planting unit 4 can be quickly stopped at a predetermined height from the state where the operation is suspended with the planting unit 4 raised to the uppermost position. Is possible.
That is, it is possible to quickly perform seedling work from a state where the work has been paused, or to confirm the rearward when moving backward.

<Release>
In addition, the control unit 100, when the seedling SW64 is operated again in a state where the planting unit 4 is stopped at the predetermined height determined by the seedling relay SW64 (stopping means), You may cancel the state stopped at the predetermined height.
That is, when the seedling joint SW 64 is pushed again, after the planting part 4 stops at a predetermined height and enters the seedling joining mode, the seedling joint SW 64 is pushed again. The seedling mode may be canceled to automatically return the planting unit 4 to the original state (for example, the uppermost position).
Further, since the elevating lever 91 is used to raise and lower the planting portion 4, the above-described “releasing the state where the planting portion 4 is stopped at a predetermined height” It may be performed by operation.
That is, in this case, it can be said that the elevating lever 91 also has a function of a stopping means like the seedling joint SW 64 described above.
By comprising in this way, it becomes possible to return the height of the planting part 4 to an original state easily only by switch operation.
Further, when the seedling joint SW 64 is pushed in a state where the planting section 4 is lowered (grounded), the planting section 4 is raised to a predetermined height and the seedling joint SW 64 is operated again. It may be lowered to the grounding position in the state.
Therefore, it becomes possible to quickly return the planting unit 4 to the original position before the seeding operation after the seeding operation, and when the planting unit 4 is in the uppermost position, the planting unit 4 is taken out of the storage place. For example, when a seedling is placed on the seedling stage when it is desired to start planting work, the seedling joint SW 64 can be pushed down to a predetermined height from the uppermost position.

<Alarm means>
Further, for example, “a state where the planting unit 4 is stopped at a predetermined height and is in the seedling mode”, “to switch the operation state of the planting claws provided in the planting unit 4 When the clutch is in the “engaged state” and “the vehicle speed of the rice transplanter is equal to or higher than a predetermined vehicle speed”, an alarm means for notifying the outside may be used.
That is, in a state where the planting unit 4 is stopped at the position of the seedling mode, the planting clutch is in the engaged state and the vehicle speed is above a certain level. Specifically, the planting unit 4 is in the field. It means a state where seedlings are planted in a floating state without touching the ground, which means that the seedlings are released into the air. It is because it started.
Since such a state is not preferable, it is desirable to perform the following processing.
For example, any of the meters (not shown) provided on the dashboard 5 is turned on, a lamp provided inside the seedling SW 64 itself flashes, or a speaker or the like is provided inside or outside the dashboard 5 You may make it alert | report to an operator with a sound.
That is, the meters on the dashboard 5, seedling SW 64, speakers, and the like are specific examples of the alarm means described above.
By giving an alarm using such an alarm means, it becomes possible to prevent the state where seedlings are released into the air as described above, and start seedling planting after canceling the seedling joining mode It is possible to notify the work of doing.

<Tone of alarm means>
Next, for example, a case where the alarm means emits sound such as a speaker will be described.
As described above, “the state where the planting unit 4 is stopped at a predetermined height and is in the seedling mode”, “to switch the operation state of the planting claws provided in the planting unit 4 Is stored in the control unit 100 only when the clutch is in the “engaged state” and “the vehicle speed of the rice transplanter is equal to or higher than a predetermined vehicle speed”.
That is, for the alarm time when seedlings are released into the air, the control unit 100 stores unique audio data that is different from other alarm times (for example, when the seedling of the planting unit 4 is lost). Keep it.
Specifically, the sound data is different in terms of tone color, waveform, frequency, ringing pattern, etc., at the time of alarm when seedlings are released into the air and at other alarm times.
Specifically, the sound data at the time of warning that seedlings are released into the air is different in waveform, tone color, frequency, ringing pattern, and the like from other warning times.
With this configuration, when the rice transplanter is in a situation where the seedling is released into the air, the control unit 100 uses the alarm means to generate unique voice data that is different from other alarms. Therefore it rings.
Thereby, the operator easily determines whether or not the abnormality that is currently occurring is a situation in which the seedling as described above is released into the air according to the sound generated by the alarm means. It becomes possible.
Therefore, even if an operator performs an inappropriate operation such as planting a seedling accidentally without canceling the seedling mode, it is inappropriate for the worker because of an alarm sound by the alarm means. Can be notified.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic block diagram which shows the external appearance of the riding rice transplanter which concerns on the best form for implementing this invention. The side view of the riding rice transplanter shown in FIG. The schematic block diagram which extracted the principal part of the operation system of the steering handle 14 vicinity. The side view of the schematic block diagram of FIG. The block diagram regarding the raising / lowering control of the planting part 4. FIG. The flowchart which shows the outline of control of a riding rice transplanter. The flowchart which shows the outline of control of a riding rice transplanter.

Explanation of symbols

2 Engine 3 Body frame 5 Dashboard 61 Planting depth setting SW
62 Field hardness setting SW
63 Work selection SW
64 Seedling SW
65 Key SW
80 Angle sensor 82 Relative angle sensor 83 Vehicle speed sensor

Claims (4)

An up and down operation is possible, and a planting part for planting seedlings in the field,
A stopping means for automatically stopping the planting portion that is in contact with the farm by raising the planting portion to a predetermined height;
In rice transplanter equipped with
In a state where the planting part is at a position higher than the predetermined height,
When the stop means is operated,
A rice transplanter, wherein the planting part is lowered to the predetermined height and automatically stopped. In the state where the planting part is stopped at the predetermined height by the stopping means,
When the stop means is operated again,
The rice transplanter according to claim 1, wherein the state of stopping at the predetermined height is canceled. A state where the planting part is stopped at the predetermined height,
A clutch that switches the operating state of the planting claw provided in the planting part is in an on state,
And the state where the vehicle speed of the rice transplanter is equal to or higher than a predetermined vehicle speed,
If
The rice transplanter according to claim 1 or 2, wherein a warning is given using a warning means for notifying the outside of the fact. A state where the planting part is stopped at the predetermined height,
A clutch that switches the operating state of the planting claw provided in the planting part is in an on state,
And the state where the vehicle speed of the rice transplanter is equal to or higher than a predetermined vehicle speed,
The rice transplanter according to claim 3, wherein the warning means is warned based on voice data used only when

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