JP2005143450A - Rice transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rice transplanter enabling the setting of the lifting height of a planting part to a level desired by the operator according to the circumstance. <P>SOLUTION: A seedling renewing part SW64 is an operation means to automatically stop a planting part 4 to a predetermined height for backward motion or seedling renewing operation without lifting the planting part 4 to the uppermost position in the case of lifting the planting part 4. Although a conventional rice transplanter is provided with a convenient function to automatically lift the planting part in the backward motion while observing the back during the operation (steering) of the transplanter, e.g. in the case of backward motion of the transplanter, the automatic lift of the planting part sometimes causes the failure in the confirmation of the back direction by the lifted planting part. In the case of lifting the planting part for the seedling renewing work for supplying seedlings to the planting part, the planting part sometimes becomes too high according to the physical size of the operator to perform efficient seedling renewing work. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a rice transplanter including a planting unit for planting seedlings in a field via an elevating link mechanism.

2. Description of the Related Art Conventionally, there is a rice transplanter including a planting unit for planting seedlings in a farm field through a lifting link mechanism.
When planting seedlings, a rice transplanter equipped with such a planting unit operates a lifting link by detecting a change in the vertical position or angle of a float provided at the lower part of the rice transplanter to plant a seedling. The distance between the field and the planting part was controlled by moving the attachment part up and down.
By such control, seedling planting work was appropriately performed.
In addition, when the rice transplanter is moved back in addition to the seedling planting operation, the planting part may come into contact with the paddles or the like to be damaged. Some rice transplanters perform control to automatically raise the planting part.
Examples of such rice transplanters include those shown in Patent Documents 1 and 2 below.

Japanese Patent No. 3335977 Japanese Patent Publication No. 3092465

However, although the conventional rice transplanter as described above has a convenient function such as automatically raising the planting portion during reverse travel, it has the following problems.
Normally, when the rice transplanter is moving backward, the user operates (drives) the rice transplanter while looking at the reverse direction. However, if the planting part is automatically raised as described above, There are cases where the reverse direction cannot be confirmed depending on the part.
In addition, in the case where the planting part is raised at the time of seedling joining work to replenish seedlings to the planting part, depending on conditions such as the physique of the user, problems such as the planting part becoming too high, A fine adjustment of the height of the planting portion with a manual operation tool is required, and problems such as inability to efficiently perform seedling joining work occur.
Then, this invention is made | formed in view of the said situation, The place made into the objective provides the rice transplanter which can set the raising height of a planting part to the position which a user desires according to a condition. That is.

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

That is, in the rice planter which comprises the planting part for planting a seedling in a farm field via a raising / lowering link mechanism in Claim 1,
Apart from the planting part lifting operation tool,
The planter is configured as a rice transplanter comprising operating means for stopping the planting part at a predetermined height.

  According to a second aspect of the present invention, the predetermined height is configured as a rice transplanter having a height at which seedlings can be easily replenished to the planting part during seedling joining work.

  In Claim 3, when the said operation means is operated and the planting part is stopped and it is operated again, it is comprised as a rice transplanter by which the operation | movement before a stop is performed again.

  In Claim 4, the detection means for detecting that the said planting part exists in the said predetermined height is comprised as a rice transplanter provided in the desired position so that setting is possible.

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

  By the structure of Claim 1, the rice transplanter user can stop the ascending operation of the planting unit at a desired height by operating an operation means different from the conventional planting unit lifting operation tool. Thus, the operability and usability of the rice transplanter can be improved.

  With the configuration of the second aspect, it is possible to stop the ascending operation of the planting part at a height at which it is easy to perform the seedling work, so that the user can efficiently perform the seedling work.

  According to the configuration of the third aspect, after stopping the ascending operation of the planting part, it is possible to efficiently and easily perform the work before the stop.

  According to the configuration of the fourth aspect, for example, setting for stopping the ascending operation of the planting unit according to the user's physique and the like can be easily performed.

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.
Here, FIG. 1 is a schematic configuration diagram showing the appearance of a riding rice transplanter according to an embodiment of the present invention, FIG. 2 is a side view of the riding rice transplanter shown in FIG. 1, and FIG. 3 is a diagram of the riding rice transplanter shown in FIG. FIG. 4 is a schematic diagram showing a schematic configuration extracted from the main part of the operating system in the vicinity of the steering handle 14, FIG. 5 is a detailed diagram of the operating unit 11a, and FIG. FIG. 7 is a schematic configuration diagram of a control system related to elevation control, FIG. 7 is a schematic configuration diagram of the vicinity of the bracket 500 (swing base 500a) as viewed from the direction A in FIG. 1, and FIG. 8 is a bracket 500 (swing base 500a) shown in FIG. FIG. 9 is a flowchart showing an outline of control of the riding rice transplanter, FIG. 10 is a flowchart showing an outline of control of the riding rice transplanter, and FIG. 11 is a plan view of the operation area 90a. It is a schematic plan view.

First, the whole structure of the rice transplanter according to the best mode for carrying out the present invention will be described with reference to FIGS. 1, 2, 3, and 4.
The rice transplanter of the present embodiment is an 8-row riding rice transplanter, and the planting part 4 is arranged at the rear part of the traveling part 1 via the lifting link mechanism 27, and the traveling part 1 is located above the front part of the body frame 3. The front wheel 6 is supported on the front lower portion via the front axle case 7a, and the rear wheel 8 is supported on the rear portion via the rear axle case 7.
The engine 2 is covered with a bonnet 9, preliminary seedling platforms 10 and 10 are disposed on both sides of the bonnet 9, a steering handle 14 is disposed on the dashboard 5 at the rear of the bonnet 9, and the bonnet 9 on both sides of the vehicle body 9 and the rear body frame 3 are covered with a vehicle body cover 12, seats 13 are arranged behind the steering handle 14, both sides of the bonnet 9, the front part of the seat 13, both left and right sides of the seat 13, The back of the seat 13 is a step. Further, an eight-way fertilizer applicator 33 is disposed behind the seat 13.

<Dashboard 5 neighborhood>
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, the dashboard 5 and the steering handle 14 are provided on the front side of the seat 13, and the levers and the like related to the planting operation of the planting portion are provided near the steering handle 14 as shown in FIG. It is arranged.
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, while the right side of the dashboard 5 with respect to the steering handle 14 is provided. In the vicinity, there are provided an operation area 90a such as a cruise control lever 92, an accelerator lever 93, and an elevating lever 91 serving as a planting unit elevating operation tool for manually elevating the planting unit 4 by an operator.
As shown in FIG. 4, 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. 4, or may be formed integrally with the dashboard 5. Good.
Also, pedals such as an accelerator pedal and a brake pedal are disposed on the right step at the bottom of the dashboard 5.
It should be noted that the position of the operation system such as the lever or switch is not limited to the above-described contents, and any position may be used as long as the user can operate while sitting on the seat 13. Also good.
A left operation portion 11a and a right operation portion 11b are provided on both sides of the seat 13 (that is, on the sides). A unit clutch lever or the like is provided in the right operation unit 11b, and the left operation unit 11a will be described later with reference to FIG.

The planting part 4 is composed of a seedling stage 16, rotary cases 22.22 ... provided at the rear of the planting transmission case, planting 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 stand 16, eight rotary cases 22 are provided in the case of the above-mentioned eight-rice rice transplanter.

  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) composed of a hydraulic cylinder serving as an actuator.

A center float 34 and a side float 35 are supported via a link mechanism below the planting center case 20 and the planting transmission case connected to the rear part of the elevating link mechanism 27, and the front part of the center float 34 and the planting are planted. An angle sensor 80 is disposed on the support frame of the center case 20 or the planting transmission case as a means for detecting the rise and fall of the float, and a potentiometer, a rotary encoder, or the like is used as the angle sensor. The angle sensor 80 is connected to a control unit, and the planting unit 4 is controlled to move up and down in accordance with the raising and lowering of the float as will be described later.
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. This makes it possible to cut out seedlings of minutes and continuously plant them.

<About switches that turn on and off according to the position of the lift lever 91>
A switch that is turned on and off according to the position of the lift lever 91 will be described in detail with reference to FIG.
Hereinafter, in order to simplify the notation, “switch” is denoted as “SW”.
As described above, the elevating lever 91 is for manually elevating the planting unit 4 by being directly operated manually by an operator, and is provided conventionally.
For example, as shown in FIG. 11, when the swinging shaft of the elevating lever 91 is at the position 53a in the guide groove 91a, the planting portion 4 is lowered, and when it is at the position 55a in the guide groove 91a, the planting is performed. The process of raising the part.
Further, when the swinging shaft of the lifting lever 91 is at the position 54a, the lifting operation of the planting portion is stopped.
The position of the swinging shaft of the lifting lever 91 is recognized by, for example, turning on / off the SW53, SW55, and SW54 that are in contact with the swinging shaft of the lifting lever 91 at each of the above positions (positions 53a, 54a, and 55a). I try to recognize it.
In addition to the operation for raising and lowering the planting part 4 as described above, the planting claw provided on the rotary case 22 of the planting part 4 is operated when the swing shaft of the elevating lever 91 is at the position 56a. When the planting clutch is turned on, or when it is at the position 51a (corresponding to the left marker 40) or the position 52a (corresponding to the right marker 40), the upward rotation position of either the left or right marker 40/40 The lock mechanism may be released.
Also in this case, as described above, recognition is made by turning on / off the SW 51, SW 52, and SW 56 that are in contact with the swing shaft of the elevating lever 91 at the respective positions (positions 51a, 52a, and 56a).
That is, the elevating lever 91 is configured to be able to operate the markers 40 and 40 and the planting clutch in addition to the planting operation of the planting unit 4.
Therefore, it is not necessary to provide a separate operation system such as a link mechanism for the markers 40 and 40 and the planting clutch by the elevating lever 91, so that space can be saved.

<Operation unit 11a>
Next, the operation unit 11a provided on the left side of the seat 13 will be described in detail with reference to FIG.
The operation unit 11a is provided with switches such as a hydraulic stop lever 60, a planting depth setting SW61, a field hardness setting SW62, a work selection SW63, and a seedling joint SW64.
The hydraulic stop lever 60 is connected to the operation portion of the stop valve in order to prevent the hydraulic oil drained from the hydraulic cylinder from flowing during maintenance of the planting portion. The raising and lowering operation of the appendage 4 can be locked and released.
The planting depth setting SW 61 is a volume type switch for setting the planting depth when a seedling is planted in the field.
The field hardness setting SW 62 is a volume type switch for setting and inputting the field hardness obtained by the operator.
The operation selection SW 63 is a switch for setting the riding rice transplanter so that an operation 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 a standard field that can be used without special control when the riding rice transplanter performs planting work. (Standard mode)
“Deep water” means that the amount of water (depth) in the field is larger than that of the standard. (Deep water mode)
“Headland” means when the amount of water (depth) in the field is small compared to the above standard, or when the condition of the field is poor (such as many irregularities) compared to the central part of the field. ing. (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.

The work selection SW 63 is an example of setting change means for changing the control target value determined by the detection signals of the sensors of the center float 34 and the side float 35 since information related to the amount of water in the field is input by the worker. .
Therefore, as compared with the case where the control target value is determined only by relying on the sensor output provided in the float, it is possible to perform the lifting control more suitable for the field condition.

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 to stop automatically.
In addition to the seedling joint SW 64, the raising of the planting unit 4 may be stopped by operating another lever (for example, a conventional planting unit lifting lever).
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.
Thereby, the versatility of the operation for stopping the ascent of the planting unit 4 is increased, and the stop operation can be easily performed.
Further, when the seedling SW 64 is operated again in the stopped state, the operation performed before the stopped state may be performed again.
As a result, the original work can be efficiently performed after the seedling is transferred.
Further, the arrangement position of the operation unit 11a is not limited to the above-described content, and may be arranged at any position as long as the user can operate while sitting on the seat 13. May be provided in the vicinity of the dashboard 5 or the dashboard 5.
That is, the seedling joint SW 64 is an example of an operating means for automatically stopping the raising or lowering of the planting unit 4 at a predetermined height.
In addition, as a specific example of the predetermined height, for example, a height at which it is easy to replenish seedlings to a planting part during seedling joining work may be used.
This makes it possible to improve the workability of the seedling joining operation.
In addition, by setting the predetermined height according to the user's physique, etc., it becomes possible to perform seedling work suitable for the user's physique, and improve the usability of the rice transplanter It becomes possible.
As described above, the predetermined height setting method will be described in detail in the description of the limit switch mounting example described later.

<Control system>
Next, a schematic configuration of the control system of the above-described riding rice transplanter will be described with reference to FIG.
The schematic configuration of the control system shown in FIG. 6 is a part having the function of controlling the entire riding rice transplanter described above, and the detailed function is as follows.
As shown in FIG. 6, the control unit 100 that controls the overall control of the riding rice transplanter includes switches (SW51 to SW56) provided in the guide groove 91a of the elevating lever 91 and switches provided on the operation unit 11a. (SW61 to SW64), various sensors 300 provided in the riding rice transplanter, a center float 34, a lifting cylinder driving unit 200 that drives a lifting cylinder that lifts and lowers the planting unit 4, a lamp (monitor lamp) 110, and the like are connected. Yes.
The control unit 100 controls the entire riding rice transplanter based on information acquired from the above-described units (switches, sensors, etc.) and contents (programs, etc.) preset and stored in the control unit 100.
In addition, since the control unit 100 only needs to have a function of controlling the entire riding rice transplanter as described above, the control unit 100 may be provided at any place on the riding rice transplanter as long as the function is not limited. .

<Example of limit switch installation>
The seedling joint SW 64 already described above is a SW for the user to press when the planting unit 4 is to be automatically stopped at a predetermined height.
Here, a mechanism in which the riding rice transplanter automatically stops the planting unit 4 at the predetermined height will be described.
As an outline of the mechanism of this automatic stop, the control unit 100 determines the position of the top link 25 or the object that operates integrally with the top link 25 in a state where the planting unit 4 is at the predetermined height, a limit switch or the like. This is realized by stopping the operation of the elevating link mechanism 27 by this detection.
That is, the limit switch is already included in the various sensors 300 described above.
Such a limit switch may be provided on a bracket 500 in which the top link 25 is swingably provided in the swing base portion 500a of the top link 25 in FIG.
A specific example of attaching the limit switch will be described below with reference to FIG.
FIG. 7 is a schematic configuration diagram of the swing base 500a shown in FIG. 1 as viewed from the rear right side of the rice transplanter.
The bracket 500 shown in FIG. 7 is fixed to the frame of this machine of the riding rice transplanter, and pivotally supports a shaft 510 fixed to the end of the top link 25. is there.
With such a configuration, the top link 25 can swing up and down (that is, in the direction of arrow C and arrow D) with the shaft 510 as a swing fulcrum, and the planting portion 4 provided on the other end side can be lifted and lowered. It becomes possible to make it.
The top link 25 can be swung by connecting an actuator such as a lift cylinder to the top link 25 or the shaft 510.
In addition, a U-shaped bar 515 serving as a detection means is provided on the shaft 510 in front of the top link 25.
That is, the top link 25 and the U-shaped bar 515 are both fixed to the shaft 510 and integrally swing in the arrow C direction or the arrow D direction.
Also, as shown in FIG. 7, the brackets are provided on the left and right as a pair, and the top link 25 swings in the middle part of the two sets of brackets on the left and right.

A top plate 501 (on the right side) and 502 (on the left side) are provided on the upper part of the combination of the left and right brackets.
Further, L-shaped plate members 530 (right side) and 540 (left side) bent in an L shape are provided on the top plates 501 and 502 via bolts 532 and 542, respectively.
Limit switches 610 (right side) and 620 (left side) are provided on the side surfaces of the L-shaped plate members 530 and 540, respectively, and a plate member 615 (right side) serving as a detection piece is located in front of both limit switches. ) And 625 (left side) are provided.
The two plate members 615 and 625 are urged rearward by an urging shaft 616 (not shown in FIG. 7, refer to FIG. 8) 626 using a force such as a spring.

Here, the relationship between the limit switch, the plate member, and the urging shaft will be described with reference to FIG.
FIG. 8 schematically shows a side view of the schematic configuration diagram of FIG. 7 as viewed from the direction B, and therefore, description of members and the like unnecessary for the description is omitted.
Further, in FIG. 8, the limit switch 620, the left plate member 625, the biasing shaft 626 and the like provided on the left L-shaped plate member 540 are indicated by dotted lines, while the right L-shaped plate member 530 is provided. The limit switch 610, the right plate member 615, the biasing shaft 616, and the like are indicated by solid lines.
Further, as shown in FIG. 8, the right side member (solid line; limit switch 610 etc.) is located behind the left side member (dotted line; limit switch 620 etc.) and shifted so as to be different from each other. Is provided.
Furthermore, as shown in FIG. 8, protrusions (members that move the movable contacts) 617 and 627 that can protrude forward are provided on the front side of both limit switches (that is, on the plate members 615 and 625 side). Yes.
That is, the limit switches 610 and 620 detect “whether or not the protrusions 617 and 627 are urged by the plate members 615 and 625”, in other words, “change in the position of the protrusions 617 and 627”. To do.

Since it is configured as described above, when the top link 25 whose one end is fixed to the shaft 510 swings in the C direction (that is, the planting part 4 is lifted), the U-shape is also fixed to the shaft 510. The mold bar 515 also swings in the direction of arrow C (that is, moves forward).
In this case (when swinging in the direction of arrow C), when the U-shaped bar 515 comes into contact with the plate member 615, the plate member 615 is pushed forward, so that the protrusion 617 is biased backward. It will be unraveled and protrude forward.
In other words, in this case, the limit switch 610 detects a change in the protrusion 617. For example, when the limit switch 610 is configured with an A contact, the change causes the “contact to open” (OFF). When configured, the change causes “contact close” (ON).
Therefore, the control unit 100 detects the change in the contact (the presence or absence of voltage or the presence or absence of current) to stop the swinging operation of the top link 25 in the arrow C direction. By stopping the operation, it is possible to stop the raising of the planting part 4.

Further, as already described with reference to FIG. 8, the right side member (solid line; limit switch 610 etc.) and the left side member (dotted line; limit switch 620 etc.) are provided so as to be different from each other. It has been.
By making the positions different in this way, for example, the maximum limit when the top link 25 swings in the direction of arrow C (that is, the direction in which the planting part 4 rises) is detected by the left member (dotted line). On the other hand, the right member (solid line) may be set so as to detect the position where the planting unit 4 is stopped at the predetermined height.

<Position where the right member (solid line; limit switch 610, etc.) is provided>
In this case, in order to detect whether or not the planting part 4 is at a predetermined height using the right member (solid line), the top link when the planting part 4 is at the predetermined height. The right member (solid line) may be provided so that the position of 25 (that is, the position of the U-shaped bar 515) can be detected.
That is, any configuration may be used as long as the right member (solid line) can be freely set at a desired position in the front-rear direction with respect to the bracket 500.
As a specific example of such a configuration, a long hole 531 in the front-rear direction may be provided on the top plate 501 and the L-shaped plate member 530 as shown in FIG.
By providing such a long hole 531, the top plate 501 can be fixed on the L-shaped plate member 530 by a bolt 532 at a desired position in the front-rear direction.

Further, members 561 and 562 for pivotally supporting a screw shaft 521 having a thread cut are fixed to the outer surface of the right bracket 500, and the nut 522 is attached to the screw shaft 521 between the member 561 and the member 562. Are screwed together.
Further, the upper part of the nut 522 and the lower part of the L-shaped plate member 530 are fixedly integrated with each other.
Also, a knob 520 is provided so that it can be turned by hand to the end side of the screw shaft 521, the knob 520 is fixed to one end of the screw shaft 521 pivotally supported on the machine side, and a nut 522 is screwed in the middle of the screw shaft 521. The nut 522 may be fixed to the L-shaped plate member 530.
With this configuration, the nut 522 can be relatively moved in the front-rear direction by rotating the screw shaft 521 with the knob 520, and the right member (solid line; limit) provided in the L-shaped plate member 530 The switch 610 or the like) can be freely moved to a desired position in the front-rear direction.
Since it becomes possible to attach a limit switch freely by comprising as mentioned above, the setting of the height which stops the raising operation of a planting part according to a user's physique etc. can be performed easily, for example. It becomes like this.
Moreover, also when adding the function to stop the descending operation | movement of a planting part in a desired position, the height of a stop can be set using this limit switch.

<Elevation control of planting part 4>
Next, an example of the control regarding the planting part 4 of a riding rice transplanter is demonstrated using the flowchart of FIG. 9, 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 planting unit lowering SW 53 is pressed, the process proceeds to step S30, and when the planting unit ascending SW 55 is operated, 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 an operator's attention by providing the display part etc. which are provided in a riding rice transplanter in the display lamp which displays that it is the said raise mode.
In the process of step S10, the planting unit 4 has reached a predetermined height in “when the stop SW 54 or other switch is pressed” or “when the seedling joint SW 64 is pressed”. If it is determined, the process proceeds to step S20 and becomes neutral (that is, stops).
On the other hand, in the process of step S10, when the planting unit lowering SW 53 is pressed, the process proceeds to step S30.

In the process of step S30, when the planting unit 4 performs the lowering control and the planting clutch is in the disengaged state, the control unit 100 sets the planting clutch in the on state by pressing the planting unit lowering SW53. On the other hand, when the planting part 4 is controlled to be lowered and the planting clutch is in the engaged state, the planting clutch is brought into the disengaged state by pressing the stop SW 54 (S30).
That is, this step S30 can be said to be a lowering mode for lowering the planting part 4.
When the planting part 4 is controlled to be lowered and the planting clutch is in the disengaged state, if the stop SW 54 is pressed, the process proceeds to step S20. On the other hand, if the planting part raising SW 55 is pressed, the process is performed. The process proceeds to step S10, and if no operation is performed (via processing path “1”), the process proceeds to step S40 (see FIG. 10).
Furthermore, when the planting part 4 is controlled to be lowered and the planting clutch is in the engaged state, if the planting part raising SW 55 is pressed, the process proceeds to step S10, and if no operation is performed (processing path) Step S40 (see FIG. 10) is performed (via “2”).

In the process of step S40, the control unit 100 performs neutral control of the planting unit 4, and when the planting clutch is in the disengaged state, the planting unit lowering SW 53 is pressed to turn on the planting clutch, On the other hand, when the neutral control of the planting part 4 is performed and the planting clutch is in the engaged state, the planting clutch is brought into the disengaged state by pressing the stop SW 54 (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.
When the planting unit 4 is neutrally controlled and the planting clutch is in the disengaged state, if the planting unit ascent SW 55 is pressed, the process proceeds to step S10 (via the processing path “3”). If no operation is performed, the process proceeds to step S50.
Furthermore, when the planting part 4 is neutrally controlled and the planting clutch is in the engaged state, when the planting part raising SW 55 is pressed, 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 and lowering of the planting unit 4 and, when the planting clutch is in a disengaged state, the planting clutch is lowered by pressing the planting unit lowering SW 53, On the other hand, when the raising / lowering control of the planting unit 4 is performed and the planting clutch is in the engaged state, the planting clutch is brought into the disengaged state by pressing the stop SW 54 (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.
When the planting unit 4 is controlled to be moved up and down and the planting clutch is in the disengaged state, if the planting unit ascent SW 55 is pressed, the process proceeds to step S10 (via the processing path “3”).
Furthermore, when the planting unit 4 is controlled to be moved up and down and the planting clutch is in the engaged state, if the planting unit raising SW 55 is pressed, the process proceeds to step S10 (via the processing path “3”).
The passenger rice transplanter can perform the rice transplanting work efficiently by performing the series of processes as described above during normal control.

Moreover, in the above-mentioned, if stop SW54 is operated by step S10 (rise mode), a process will transfer to step S20 (neutral mode) which stops operation | movement of the planting part 4. FIG.
Thereafter, when the planting unit lowering SW 53 is operated again, the process shifts to step S30 (lowering mode) and enters the grounding stop mode of step S40 through the processing path “1”.
That is, even if the planting unit 4 is automatically raised, the planting unit 4 can be easily set to the grounding stop mode only by operating the elevating lever 91 twice.

In addition, when the stop SW 54 is operated and the planting clutch is in the disengaged state in step S10 (up mode), for example, when the planting unit lowering SW 53 is operated again, the planting unit 4 is automatically operated. You may perform control which grounds to a farm field, makes a planting clutch into an engagement state, and prohibits back interlocking (the planting part 4 is raised at the time of reverse travel).
Thereby, for example, at the time of seedling succession of a riding rice transplanter, when turning a headland, or when moving backward at a minute distance, the planting unit 4 can be stopped without being raised to the top, and then quickly brought into contact with the field again. It becomes possible.
Therefore, the mobility of the riding rice transplanter can be increased and the working efficiency can be increased.

The schematic block diagram which shows the external appearance of the riding rice transplanter which concerns on embodiment of this invention. The side view of the riding rice transplanter shown in FIG. Detailed drawing which shows schematic structure of the seat 13 vicinity 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 detailed view of the operation part 11a. The schematic block diagram of the control system regarding the raising / lowering control of the planting part 4. FIG. The schematic block diagram which looked at the bracket 500 (oscillation base part 500a) vicinity from the A direction of FIG. The typical side view which looked at the bracket 500 (oscillation base part 500a) vicinity shown in FIG. 7 from the B direction. 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. The schematic plan view which planarly viewed the operation area | region 90a.

Explanation of symbols

4 Planting part 11a, 11b Operation part 14 Steering handle 16 Seedling stage 51, 52 Marker switch (marker SW)
53 Planting part lowering switch (planting part lowering SW)
54 Stop switch (stop SW)
55 Planting part raising switch (planting part raising SW)
61 Planting depth setting switch (planting depth setting SW)
62 Field hardness setting switch (Field hardness setting SW)
63 Work selection switch (work selection SW)
64 Seedling switch (seedling SW)

Claims (4)

In a rice transplanter equipped with a planting part for planting seedlings in a field via a lifting link mechanism,
Apart from the planting part lifting operation tool,
A rice transplanter comprising operating means for stopping the planting part at a predetermined height.   2. The rice transplanter according to claim 1, wherein the predetermined height is a height at which seedlings can be easily supplied to a planting part during seedling joining work.   The rice transplanter according to claim 1 or 2, wherein when the operation means is operated and the planting part is stopped and then operated again, the operation before the stop is performed again. The rice transplanter according to any one of claims 1 to 3, wherein detection means for detecting that the planting part is at the predetermined height is provided so as to be set at a desired position. .

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