JP2012196227A - Paddy field working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paddy field working vehicle configured to set both functions for automatically operating a right or left marker in an acting position and for automatically operating a working implement in a working state, to an appropriate operative and stopped state.SOLUTION: The paddy filed working vehicle for setting a working state in which both a marker operating unit 54 and a working implement operating unit 55 work, and a stopped state in which both the marker operating unit 54 and the working implement operating unit 55 stop, includes a manually operable single manual operation device 46.

Description

  The present invention relates to a structure of turning in a paddy field in a paddy field work vehicle such as a riding type rice transplanter or a riding type direct seeder.

  In a riding rice transplanter, which is an example of a paddy field work vehicle, the planting clutch that transmits power to the seedling planting device (corresponding to the working device) is shut off when the operation process is completed and the aircraft reaches the edge. The state is operated (corresponding to the non-working state), the seedling planting device is raised from the paddy surface (corresponding to the non-working state), and turning is performed (turning that makes a substantially U-turn). When the turning is finished, the seedling planting device is lowered to the surface (corresponding to the working state), the planting clutch is operated to the transmission state (corresponding to the working state), and the next work process is started.

  For example, in Patent Document 1, a riding type rice transplanter is provided with right and left rotational speed sensors (50 in FIGS. 2 and 6 of Patent Document 1) for detecting the rotational speeds of the right and left rear wheels. When the aircraft reaches the heel and starts turning, the detection (integration) of the travel distance of the aircraft is started by the rotation speed sensor on the turning center side (steps S101 and S102 in FIG. 7 of Patent Document 1).

  When the travel distance of the aircraft reaches the set distance, it is determined that the turn has been completed, and the seedling planting device automatically descends to the paddy surface (step S14 in FIG. 8 of Patent Document 1) (corresponding to the working state), The attached clutch (26 in FIG. 6 of Patent Document 1) is automatically operated to the transmission state (Step S20 in FIG. 8 of Patent Document 1) (corresponding to the non-working state), and seedling planting by the seedling planting device is performed. It starts automatically. Thus, at the end of turning, the driver does not have to lower the seedling planting device to the rice field or operate the planting clutch to the transmission state by using a lifting lever or the like.

In Patent Document 1, right and left markers that can be operated in an action posture in which an indicator for the next work process is formed on the surface by touching the surface and a retracted posture upward from the surface (FIGS. 1 and 6 of Patent Document 1). 19).
In this case, in Patent Document 2, auto marker means (corresponding to marker operation means) is provided for the right and left markers, and the auto marker means operates as follows.

  For example, when the working device is raised from the surface in a state where the left marker is operated to the acting posture and the right marker is operated to the retracted posture, the left marker is operated to the retracted posture (the right marker is also stored) Maintained in posture). Next, when the turning is completed and the working device is lowered to the surface, the right marker is operated to the action posture while the left marker is maintained in the retracted posture. This eliminates the need for the driver to operate the right or left marker to the action posture by operating the operation lever when the working device is lowered to the surface.

JP 2008-230302 A Japanese Patent Application Laid-Open No. 2004-187637

  According to the present invention, in a paddy field work vehicle, the working device automatically operates based on the function of automatically operating the right or left marker to the acting posture as the working device is moved up and down, and the detection of the turning end position. In the case where a function operated in a state is provided, it is an object of the present invention to be configured so that both functions can be appropriately set to an activated state and a stopped state.

[I]
(Constitution)
The first feature of the present invention is that the paddy field vehicle is configured as follows.
The work device provided in the aircraft is configured to be operable in working and non-working states,
It is equipped with right and left markers that can be operated in an action posture for grounding to the surface and forming an index of the next work process on the surface and a retracted posture above the surface,
As the working device rises from the surface, the right or left marker of the acting posture is operated to the retracted posture, and as the working device descends to the surface, the working device rises from the surface. Marker operating means for operating the marker on the opposite side of the right or left marker operated to the retracted posture to the acting posture;
Airframe position detecting means for detecting the position of the airframe's turning stroke as the airframe starts turning, turning end position detecting means for detecting a turning end position based on detection by the airframe position detecting means, and turning end position detection Working device operating means for operating the working device to a working state based on the detection of the means,
An operating state in which both the marker operating means and the work device operating means are activated, and a stop state in which both the marker operating means and the work device operating means are stopped. Equipped with human operation tools.

The second feature of the present invention resides in the following configuration in a paddy field work vehicle.
The work device provided in the aircraft is configured to be operable in working and non-working states,
It is equipped with right and left markers that can be operated in an action posture for grounding to the surface and forming an index of the next work process on the surface and a retracted posture above the surface,
As the working device rises from the surface, the right or left marker of the acting posture is operated to the retracted posture, and as the working device descends to the surface, the working device rises from the surface. Marker operating means for operating the marker on the opposite side of the right or left marker operated to the retracted posture to the acting posture;
Airframe position detecting means for detecting the position of the airframe's turning stroke as the airframe starts turning, turning end position detecting means for detecting a turning end position based on detection by the airframe position detecting means, and turning end position detection Working device operating means for operating the working device to a working state based on the detection of the means,
A first manipulator that is operated artificially by operating the marker operating means in an activated and stopped state, and a second manipulatively operated by operating the working device operating means in an activated and stopped state. With human operation tools,
When one of the first and second artificial operating tools is operated, the other of the first and second artificial operating tools is operated in conjunction with this, and the first and second artificial operating tools are operated. When one of the operating tools is operated in a stopped state, the first and second artificial operating tools are linked so that the other one of the first and second artificial operating tools is operated in a stopped state. To do.

(Function)
[I] -1
In a riding type rice transplanter that is an example of a paddy field work vehicle, for example, a work form as shown in FIGS. 6 and 7 may be employed in a square paddy field in plan view.
For example, the aircraft is first positioned at a position K1 shown in FIG. 6, the seedling planting device 5 is lowered to the paddy surface, and the left marker 19 is operated to the acting posture (the right marker 19 is the retracted posture). In this state, the planting clutch is operated in the disengaged state and travels along the saddle B, and the left marker 19 forms an index of the work process L01 on the paddy field (empty work process LA1). Even if the planting clutch is not operated in the idle operation stroke LA1, the seedling planting device 5 is moved down to the paddy field so that the passage marks of the front and rear wheels are erased by the float of the seedling planting device 5. Because of that.

  For example, as shown in FIG. 6, when the aircraft reaches the heel from the empty work process LA1, the seedling planting device 5 is raised from the surface to perform the turning LL1 (the left marker 19 is operated to the retracted position), The seedling planting device 5 is lowered to the surface, the planting clutch is operated in the transmission state, and the operation process L01 is entered. In the work process L01, the right marker 19 is operated to the working posture (the left marker 19 is in the retracted posture), and the seedling is planted by running the aircraft along the index formed on the surface in the empty work process LA1. While performing, the index of the next work process L02 is formed on the rice field by the right marker 19.

  For example, as shown in FIG. 6, when the aircraft reaches the heel from the work process L01, the planting clutch is operated in a disengaged state, the seedling planting device 5 is lifted from the surface, and the turn LL2 is performed (right marker 19 The seedling planting device 5 is lowered to the paddy surface, the planting clutch is operated to the transmission state, and the next work process L02 is entered. In the work process L02, the left marker 19 is operated to the action posture (the right marker 19 is in the retracted position), and the plant is planted by running the aircraft along the index formed on the surface in the previous work process L01. While performing the above, an indicator for the next work process L03 is formed on the surface by the left marker 19.

[I] -2
For example, as shown in FIGS. 6 and 7, when a plurality of work steps L01, L02, L03, L04, and L05 and turns LL1, LL2, LL3, LL4, and LL5 are performed, seedlings are planted along four ridges B A portion that is not formed is formed. In this state, when the aircraft reaches the heel from the work process L05, the planting clutch is operated to be disengaged, the seedling planting device 5 is lifted from the surface and the turn LL6 is performed, and the aircraft is positioned at the position indicated by K2. .
At the position indicated by K2, the seedling planting device 5 is lowered to the paddy surface, the planting clutch is operated in the transmission state, and the rotating work process LB1 is started. In the turning work process LB1, there is a cocoon B on the left side of the machine, and there are seedlings planted in the work process L05 on the right side of the machine, so the right and left markers 19 are operated to the retracted posture.

  For example, as shown in FIG. 7, when the aircraft reaches the heel from the turning operation process LB1, the planting clutch is operated to be disconnected, and the seedling planting device 5 is raised from the surface to turn and reverse 90 degrees. As a result, the machine body is positioned at the position K3, the seedling planting device 5 is lowered to the surface, the planting clutch is operated in the transmission state, and the turning work process LB2 is started. In the turning work process LB2, as in the previous turning work process LB1, the right and left markers 19 are operated to the retracted posture.

For example, as shown in FIG. 7, in the same manner, the two round work steps LB3 and LB4 (the seedling planting device 5 is lowered onto the surface, the planting clutch is operated in the transmission state, and the right and left markers 19 are moved. To the retracted position). The turning work process LB3 travels in the reverse direction in the idle work process LA1 shown in FIG. 6, and when the turning work process LB4 ends, the aircraft reaches the position where the turning LL6 has been performed. Thereafter, the aircraft is taken out from the exit of the paddy field in the vicinity of the position where the turn LL6 is performed.
As described above, for example, in a square paddy field in plan view as shown in FIGS. 6 and 7, one empty work process LA1, a plurality of work processes L01 to L05, and four rotating work processes LB1 to LB4 are performed. By doing so, seedlings can be planted in all parts of the paddy field.

[I] -3
As described in the preceding item [I] -1, for example, in a square paddy field in a plan view as shown in FIG. 6, when entering the work process L01 from the empty work process LA1, a general turning LL1 makes a substantially U-turn. (Typical) turning, the marker 19 on the side opposite to the marker 19 operated to the retracted posture in the turning LL1 is operated to the acting posture in the working stroke L01 (the left marker 19 is acted on in the empty working stroke LA1) (In contrast to operating in the posture, the right marker 19 is operated in the working posture in the work stroke L01).
Similarly, when entering from the work process to the next work process, the turns LL2 to LL5 are general (typical) turns that are substantially U-turns, and are opposite to the markers operated to the retracted posture in the turns LL2 to LL5. The side marker is operated to the acting posture in the next work process.

Thus, it is appropriate that the working device is automatically operated to the working state when entering the work process from the empty work process and when entering the next work process from the work process. It is appropriate to automatically operate the marker on the opposite side of the right or left marker that has been operated to the retracted posture with the rising of the position.
In other words, it is not appropriate to set the marker operating means to the operating state and set the working device operating means to the stopped state, and similarly set the marker operating means to the stopped state and operate the working device operating means. It is not appropriate to set the state.

According to the first feature of the present invention, it is possible to set an operating state in which both the marker operating means and the work device operating means are operated by a single human operation tool.
According to the second feature of the present invention, when the marker operating means is set to the operating state by the first human operating tool, the second human operating tool is operated in conjunction with this, and the work device operating means is set to the operating state. The When the work device operating means is set to the operating state by the second human operating tool, the first human operating tool is operated in conjunction with this, and the marker operating means is set to the operating state.

  Therefore, according to the first and second features of the present invention, when entering the work process from the empty work process, and when entering the next work process from the work process, the driver operates the human operation tool (first human operation tool). By operating the (second artificial operating tool), it is possible to set an operating state in which both the marker operating means and the work device operating means are operated. The marker operating means is operated by operating one artificial operating tool. There is no need to set the operating state, and then operate another human operating tool to set the working device operating means to the operating state.

  According to the first and second features of the present invention, by operating the human operation tool (first and second human operation tool), the marker operation means is set to the operating state and the work device operation means is set to the stop state. The marker operating means cannot be set to the stopped state, and the work device operating means cannot be set to the activated state. As a result, an inappropriate state in which one of the marker operating means and the work device operating means is in an operating state and the other is in a stopped state does not occur.

[I] -4
In contrast to the preceding item [I] -1, as described in the preceding item [I] -2, for example, as shown in FIG. 7, when entering the next turning operation step LB2 from the turning operation step LB1, the turning operation step LB2 starts. When entering the next round work process LB3, when entering the next round work process LB4 from the round work process LB3, there is a case of turning 90 degrees and moving backward, and turning when entering the work process L01 from the empty work process LA1. The turn is different from LL1 and the turns LL2 to LL5 when entering the next work process L02 from the work process L01.
When entering the next round work process LB1 to LB4 from the round work process KB1 to LB4, the right or left marker 19 is not operated to the action posture, and the right and left marker 19 is operated to the retracted position.

As a result, it is not appropriate for the working device to be automatically operated to the working state when entering the next turning work step from the turning work step, and the storage device is operated in the retracted posture as the working device is raised. It is not appropriate that the marker on the opposite side of the right or left marker is automatically operated to the working posture.
In other words, it is not appropriate to set the marker operating means to the operating state and set the working device operating means to the stopped state, and similarly set the marker operating means to the stopped state and operate the working device operating means. It is not appropriate to set the state.

According to the first feature of the present invention, it is possible to set a stop state in which both the marker operating means and the work device operating means are stopped by a single human operation tool.
According to the second feature of the present invention, when the marker operating means is set to the stopped state by the first human operating tool, the second human operating tool is operated in conjunction with this, and the work device operating means is set to the stopped state. The When the working device operating means is set to the stopped state by the second artificial operating tool, the first artificial operating tool is operated in conjunction with this, and the marker operating means is set to the stopped state.

  Therefore, according to the first and second features of the present invention, the driver operates the human operating tool (first human operating tool) (second human operating tool) when entering the next rotating work process from the rotating work process. By doing so, it is possible to set a stop state in which both the marker operation means and the work device operation means are stopped, and by operating one artificial operation tool, the marker operation means is set to the stop state, and then another Therefore, it is not necessary to set the work device operating means to the stop state by operating the artificial operation tool.

  According to the first and second features of the present invention, by operating the human operation tool (first and second human operation tool), the marker operation means is set to the operating state and the work device operation means is set to the stop state. The marker operating means cannot be set to the stopped state, and the work device operating means cannot be set to the activated state. As a result, an inappropriate state in which one of the marker operating means and the work device operating means is in an operating state and the other is in a stopped state does not occur.

(The invention's effect)
According to the first and second features of the present invention, marker operating means (a function in which the right or left marker is automatically operated to an action posture as the working apparatus is raised and lowered) and working apparatus operating means (turning end position) When the working device is automatically operated to the working state based on the detection of the marker, the marker operating means and the working device operating means can be appropriately set to the activated and stopped states, The operability of the paddy field work vehicle was improved.

[II]
The third feature of the present invention resides in the following configuration in the paddy field work vehicle of the first or second feature.
A travel distance detection means for detecting the travel distance of the airframe; and a steering angle detection means for detecting a steering angle from a straight position of the front wheel,
The turning radius of the fuselage and the movement angle of movement of the fuselage with respect to the turning center of the fuselage are detected based on the travel distance of the fuselage and the steering angle from the straight position of the front wheel. Based on the above, a trigonometric function is used to detect the position of the aircraft in the traveling direction of the aircraft before the start of turning, and the position of the aircraft in the traveling direction of the aircraft before starting the turning is detected as the position of the turning stroke of the aircraft. Thus, the airframe position detecting means is configured.

(Function)
In the preceding paragraphs [I] -1 and 3, as the configuration for detecting the position of the turning stroke of the aircraft as the aircraft starts turning, the travel distance of the aircraft from the start of turning is detected, and the position of the turning stroke of the aircraft is May be configured to do. This configuration is based on the idea that the turn at the shore of a paddy field work vehicle is a similar turn (standard turn), and the position of the turn of the airframe depends on the distance traveled from the start of the turn. It is the idea that it is derived.
However, if the turning at the shore becomes larger or smaller than expected due to the difference in the driver's maneuvering, the precondition of “typical turning” is lost in the above configuration, so the aircraft's The position of the turning stroke of the airframe cannot be accurately detected only by the travel distance.

  According to the third feature of the present invention, the distance traveled by the aircraft and the steering angle from the straight travel position of the front wheel are used, and the steering angle from the straight travel position of the front wheel is added to the travel distance of the aircraft. Thus, it is possible to detect in which direction and how much the aircraft has advanced. If it is possible to detect how much the aircraft has advanced in which direction, even if the turning at the shore becomes larger or smaller than expected, regardless of this, before the start of turning (for example, L01 in FIG. 8). The position of the aircraft (see, for example, Y1 in FIG. 9B) in the traveling direction of the aircraft (see, eg, (+ Y) (−Y) in FIG. 8) can be detected.

  For example, as shown in FIGS. 9 (a) and 9 (b), the turning radius R of the aircraft and the turning center C of the aircraft are determined by the traveling distance G of the aircraft and the steering angle A from the straight travel position A1 of the front wheel 1. It is possible to detect the movement angle θ that the airframe has moved (for example, based on the wheel base W of the front wheel 1 and the rear wheel 2 and the steering angle A from the straight movement position A1 of the front wheel 1) The turning radius R is detected, and the movement angle θ of the aircraft is detected based on the turning center C and the turning radius R of the aircraft and the travel distance G of the aircraft). By detecting the turning radius and the movement angle of the aircraft, the position of the aircraft in the traveling direction of the aircraft before the start of turning can be accurately detected by a trigonometric function (for example, R * SIN in FIG. 9B). (Y1 is detected by (θ)).

  Thereby, according to the third feature of the present invention, the position of the aircraft in the traveling direction of the aircraft before the start of turning, regardless of whether the turning at the shore becomes larger or smaller than expected, The position of the turning stroke of the airframe can be detected with high accuracy, and the turning end position can be accurately detected based on the position of the turning stroke of the airframe.

(The invention's effect)
According to the third feature of the present invention, by detecting the position of the airframe in the traveling direction of the airframe before the start of turning as the position of the turning stroke of the airframe, the turning end position can be accurately detected, and the turning end position Based on this detection, the working device can be appropriately operated to the working state, and the working performance of the paddy field work vehicle can be improved.

It is a whole side view of a riding type rice transplanter. It is a top view which shows the steering operation system of the right and left front wheels, the transmission system to the right and left front wheels, and the right and left rear wheels. Airframe position detection means, turning start position detection means, turning end position detection means, marker operation means, work device operation means, turning direction detection means, storage means, automatic elevation control means, setting switch control system provided in the control device FIG. It is a figure which shows the flow of the first half of the control of turning at the shore. It is a figure which shows the flow of the second half of the control of turning at the shore. It is a top view which shows the operation | work form (an empty work process and a work process) of the riding type rice transplanter in a paddy field. It is a top view which shows the operation | work form (turning work process) of the riding type rice transplanter in a paddy field. It is a top view which shows the state of turning at the heel. (A) is a top view which shows the state which detects the steering angle from the straight drive position of a wheel base, a front wheel, the turning center of an airframe, and the turning radius of an airframe. (B) is a top view which shows the state which detects the position of the body in the advancing direction of the body of a work process by the turning radius and movement angle of a body. In a first alternative embodiment for carrying out the invention, a machine body position detecting means, a turning start position detecting means, a turning end position detecting means, a marker operating means, a work device operating means, a turning direction detecting means, and a memory provided in the control device. It is a figure which shows the control system of a means, an automatic raising / lowering control means, and a setting switch.

[1]
As shown in FIG. 1, a link mechanism 3 is supported by a rear part of a machine body supported by right and left front wheels 1 and right and left rear wheels 2 so that the link mechanism 3 can be moved up and down. And a seedling planting device 5 (corresponding to a working device) is supported at the rear of the link mechanism 3 to constitute a riding type rice transplanter as an example of a paddy field work vehicle. A paddy field generally has a mud or water layer formed on the lower hard cultivator G1, and the uppermost surface of the mud or water layer is a field surface G2, and the right and left front wheels 1, the right and left rear The wheel 2 travels in contact with the tiller G1.

  As shown in FIG. 1, the seedling planting device 5 includes three planting transmission cases 6, a rotary case 7 supported on the left and right of the rear portion of the planting transmission case 6, and rotatably supported at both ends of the rotary case 7. A pair of planting arms 8, a plurality of floats 9, a seedling platform 10, and the like are provided and configured in a six-row planting type. A hopper 14 for storing powdered fertilizer and three feed units 15 (corresponding to a working device) are provided on the rear side of the driver seat 13, and a blower 16 is provided below the driver seat 13. It has been. The float 9 is provided with a groove forming device 17, and a hose 18 is connected across the feeding portion 15 and the groove forming device 17.

  As shown in FIGS. 1 and 3, right and left markers 19 are provided on the right and left side portions of the seedling planting device 5, and are in contact with the surface G <b> 2 to form an indicator (see FIG. 1). , And a retracted posture (see FIG. 3) that is spaced upward from the surface G2, so that it can be operated freely. The right and left markers 19 include an arm portion 19a supported by the seedling planting device 5 so as to be swingable up and down, and a rotating body 19b supported at the tip of the arm portion 19a so as to freely rotate. The electric motor 21 is provided to operate the right and left markers 19 to the working posture and the retracted posture, and the electric motor 21 is operated by the control device 23.

[2]
Next, the transmission system to the right and left front wheels 1 will be described.
As shown in FIG. 2, the power of the engine 31 is transmitted to the hydrostatic continuously variable transmission 33 and the transmission case 34 via the transmission belt 32, and the front wheel differential is transmitted from the auxiliary transmission (not shown) of the transmission case 34. It is transmitted to the right and left front wheels 1 via a mechanism (not shown) and a transmission shaft (not shown) of the front axle case 35. The hydrostatic continuously variable transmission 33 is configured to be continuously variable from the neutral position to the forward side and the reverse side. As shown in FIG. 1, a shift lever 45 provided on the left side of the steering handle 20 is provided. To operate the hydrostatic continuously variable transmission 33.

  As shown in FIG. 2, a steering member 41 having a trapezoidal shape in plan view is swingably supported around the vertical axis P <b> 2 at the bottom of the mission case 34, and the steering member 41 is swung by the steering handle 20. The tie rod 42 is connected across the steering member 41 and the right and left front wheels 1. Accordingly, by operating the steering handle 20, the right and left front wheels 1 (steering member 41) can be steered from the straight travel position A1 over the right and left steering limits A3.

  As shown in FIGS. 1 and 2, reinforcing right and left frames 49 are connected across the rear portion of the mission case 34 and the body frame 66. A potentiometer 47 (corresponding to the steering angle detection means) is fixed to the left frame 49 in the body side, and a linkage rod 48 is connected across the steering member 41 and the detection arm 47a of the potentiometer 47.

  As shown in FIGS. 2 and 3, the position of the steering member 41 is detected by the potentiometer 47, and the detected value of the potentiometer 47 is input to the control device 23, and the right and left front wheels are detected by the detected value of the potentiometer 47. 1 (steering member 41) is detected a steering angle A from a straight traveling position A1.

[3]
Next, the transmission system to the right and left rear wheels 2 will be described.
As shown in FIG. 2, the power of the auxiliary transmission of the transmission case 34 is the transmission shaft 36, the input shaft 38 of the rear axle case 37, the bevel gear 38a fixed to the input shaft 38, the bevel gear 39a meshing with the bevel gear 38a, and the bevel gear 39a. Is transmitted to the right and left rear wheels 2 via a fixed transmission shaft 39, right and left side clutches 40, and right and left axles 65.

  As shown in FIG. 2, the right and left side clutches 40 are configured in a frictional multi-plate type and are urged to a transmission state. The right and left operation shafts 43 for operating the right and left side clutches 40 in the disengaged state are supported downward by the rear axle case 37, and the right and left operation shafts 43 extend between the steering member 41 and the right and left operation shafts 43. The left operating rod 44 is connected. The right and left operation rods 44 are provided with long holes 44 a as interchangeable portions at the connection portions with the right and left operation shafts 43.

  As shown in FIG. 2, when the right and left front wheels 1 (steering member 41) are steered within the range of the straight travel position A1 and the right and left set angles A2, the right and left operation rods 44 The right and left side clutches 40 are operated in the transmission state by the interchange of the long holes 44a. As a result, the aircraft moves forward (reverse) in a state where power is transmitted to the right and left front wheels 1 and the right and left rear wheels 2 (the transmission state of the right and left side clutches 40).

  As shown in FIG. 2, when the right and left front wheels 1 (steering member 41) are steered to the right steering limit A3 side beyond the right set angle A2, the length of the right operating rod 44 is increased. The right operating rod 44 is pulled beyond the range of the hole 44 a, and the right side clutch 40 is operated to be disconnected by the right operating shaft 43. Thus, power is transmitted to the right and left front wheels 1 and the left rear wheel 2 (turning outside) (the transmission state of the left side clutch 40), and the right rear wheel 2 (turning center side) (the right side clutch). The airframe turns to the right in a state of free rotation (40 interruption state).

  As shown in FIG. 2, when the right and left front wheels 1 (steering member 41) are steered to the left steering limit A3 side beyond the left set angle A2, the length of the left operating rod 44 is increased. The left operating rod 44 is pulled beyond the range of the hole 44a, and the left side clutch 40 is operated to the disconnected state by the left operating shaft 43. Accordingly, power is transmitted to the right and left front wheels 1 and the right rear wheel 2 (turning outside) (the transmission state of the right side clutch 40), and the left rear wheel 2 (turning center side) (left side clutch). The airframe turns to the left in a state of free rotation (40 interruption state).

  As shown in FIGS. 2 and 3, right and left rotational speed sensors 50 (corresponding to travel distance detecting means) are provided in the rear axle case 37, and the right and left rotational speed sensors 50 provide right and left side sensors. The rotation speed of the lower transmission side of the clutch 40 is detected, and the detection values of the right and left rotation speed sensors 50 are input to the control device 23. Accordingly, the rotation speeds of the right and left rear wheels 2 are detected by the right and left rotation speed sensors 50 regardless of the transmission state and the disconnected state of the right and left side clutches 40.

[4]
Next, the transmission system to the seedling planting device 5 and the feeding unit 15 will be described.
As shown in FIGS. 1 and 3, the power branched from between the hydrostatic continuously variable transmission 33 and the auxiliary transmission is transmitted to the seedling planting device 5 through the planting clutch 26 and the PTO shaft 25. The The power branched from between the hydrostatic continuously variable transmission 33 and the auxiliary transmission is transmitted to the feeding portion 15 via the fertilizer clutch 27 and the drive rod 30, and is transmitted through the planting and fertilizer clutches 26, 27. And the electric motor 28 operated to the interruption | blocking state is provided.

  As shown in FIGS. 1 and 3, when the planting clutch 26 is operated in the transmission state, the rotary case 7 is turned in the direction shown in FIG. It is rotated in the clockwise direction, and the planting arms 8 alternately take out the seedlings from the lower part of the seedling platform 10 and plant them on the rice field G2. When the planting clutch 26 is operated in the disconnected state, the reciprocating lateral feed drive of the seedling platform 10 and the rotational drive of the rotary case 7 are stopped.

  As shown in FIGS. 1 and 3, when the fertilizer clutch 27 is operated in the transmission state, the fertilizer is fed from the hopper 14 by a predetermined amount by the feeding portion 15, and the fertilizer is made through the hose 18 by the blower 16. The fertilizer is supplied to the rice field G2 through the groove generator 17. When the fertilizer application clutch 27 is operated in the disconnected state, the feeding unit 15 stops and the supply of fertilizer to the surface G2 stops.

[5]
Next, the automatic raising / lowering control means 61 of the seedling planting apparatus 5 will be described.
As shown in FIG. 3, an automatic lift control means 61 is provided in the control device 23. A potentiometer 22 for detecting the height of the central float 9 with respect to the seedling planting device 5 is provided, with the rear portion of the central float 9 supported so as to be swingable up and down around the horizontal axis P1 of the seedling planting device 5. The detection value of the potentiometer 22 is input to the control device 23. As the aircraft moves, the center float 9 follows the ground surface G2 by detecting the height of the center float 9 with respect to the seedling planting device 5 based on the detection value of the potentiometer 22, and the surface G2 (center The height from the float 9) to the seedling planting device 5 can be detected.

  As shown in FIG. 3, the hydraulic cylinder 4 is provided with a control valve 24 for supplying and discharging hydraulic oil, and the control valve 24 is operated by the control device 23. When hydraulic oil is supplied to the hydraulic cylinder 4 by the control valve 24, the hydraulic cylinder 4 is contracted to raise the seedling planting device 5, and when hydraulic oil is discharged from the hydraulic cylinder 4 by the control valve 24, the hydraulic pressure is increased. The cylinder 4 is extended and the seedling planting device 5 is lowered.

  As shown in FIG. 3, based on the height of the center float 9 with respect to the seedling planting device 5 (height from the field G2 (center float 9) to the seedling planting device 5), the seedling planting device 5 The control valve 24 is operated so as to maintain the set height from the surface G2 (so that the detected value of the potentiometer 22 (the vertical distance between the potentiometer 22 and the central float 9) is maintained at the set value). The cylinder 4 expands and contracts, and the seedling planting device 5 automatically moves up and down (the operation state of the automatic lift control means 61).

[6]
Next, the lifting lever 11 will be described.
As shown in FIGS. 1 and 3, an elevating lever 11 is provided on the right side of the driver's seat 13, and the elevating lever 11 can be operated and held in an automatic position, a raised position, a neutral position, a lowered position, and a planting position. The operation position of the elevating lever 11 is input to the control device 23. A potentiometer 29 for detecting the vertical angle of the link mechanism 3 relative to the airframe is provided, and the detection value of the potentiometer 29 is input to the control device 23, and the seedling for the airframe is detected by detecting the vertical angle of the link mechanism 3 relative to the airframe. The height of the planting device 5 can be detected.

  As shown in FIG. 3, control is performed as described below in a state where the elevating lever 11 is operated to the raised position, neutral position, lowered position, and planting position (the elevating lever 11 is not operated to the automatic position). The control valve 24 and the electric motors 21 and 28 are operated by the device 23, and the hydraulic cylinder 4, the planting and fertilizing clutches 26 and 27, and the right and left markers 19 are operated. In this case, the functions of the raised position U and the lowered position D of the operation lever 12 described in [7] to be described later are not activated, and only the functions of the right and left marker positions R and L of the operation lever 12 are activated.

  As shown in FIG. 3, when the elevating lever 11 is operated to the raised position, the automatic elevating control means 61 is stopped, the planting and fertilizing clutches 26 and 27 are operated in the disconnected state, and the right and left markers 19 are retracted. The hydraulic cylinder 4 is contracted and the seedling planting device 5 is raised. When the potentiometer 29 detects that the seedling planting device 5 has reached the upper limit position in a state where the elevating lever 11 is operated to the raised position, the hydraulic cylinder 4 automatically stops.

  As shown in FIG. 3, when the elevating lever 11 is operated to the lowered position, the automatic elevating control means 61 is stopped, the planting and fertilizing clutches 26 and 27 are operated in the disconnected state, and the right and left markers 19 are retracted. In a state where the hydraulic cylinder 4 is operated, the hydraulic cylinder 4 extends and the seedling planting device 5 is lowered. When the central float 9 comes into contact with the rice field G2, the automatic lifting / lowering control means 61 is activated, and the seedling planting device 5 comes into contact with the rice field G2 and stops (the seedling planting device 5 has a set height from the rice field G2). (The state in which the seedling planting device 5 automatically moves up and down so that the detection value of the potentiometer 22 (the vertical distance between the potentiometer 22 and the central float 9) is maintained at the set value).

As shown in FIG. 3, when the elevating lever 11 is operated to the neutral position, the automatic elevating control means 61 is stopped, the planting and fertilizing clutches 26 and 27 are operated in the disconnected state, and the right and left markers 19 are retracted. The hydraulic cylinder 4 stops in a state where it is operated.
Thus, the seedling planting device 5 can be raised and lowered to an arbitrary height and stopped by operating the elevating lever 11 to the raised position, the neutral position, and the lowered position.
As shown in FIG. 3, when the elevating lever 11 is operated to the planting position, the automatic elevating control means 61 is activated in a state where the right and left markers 19 are operated to the retracted posture, 27 is operated to the transmission state.

[7]
Next, the operation lever 12 will be described.
As shown in FIGS. 1 and 3, an operation lever 12 is provided on the lower right side below the steering handle 20, and the operation lever 12 extends outward on the right side. The operation lever 12 is configured to be operable in a cross direction from the neutral position N to the upward ascending position U, the downward descending position D, the rear right marker position R, and the front left marker position L, and is biased to the neutral position N. The operation position of the operation lever 12 is input to the control device 23.

  In the state where the elevating lever 11 is operated to the automatic position, the control valve 24 and the electric motors 21 and 28 are operated by the control device 23 based on the operation of the operation lever 12 as described below, and the hydraulic cylinder 4, The attachment and fertilization clutches 26 and 27 and the right and left markers 19 are operated.

  As shown in FIG. 3, when the operating lever 12 is operated to the raised position U (operated to the raised position U and operated to the neutral position N), the planting and fertilizing clutches 26 and 27 are operated to the disconnected state and automatically The raising / lowering control means 61 is stopped, the hydraulic cylinder 4 is contracted to raise the seedling planting device 5, and the right and left markers 19 are operated to the retracted posture as will be described later. When the potentiometer 29 detects that the seedling planting device 5 has reached the upper limit position, the hydraulic cylinder 4 automatically stops.

  As shown in FIG. 3, when the operation lever 12 is operated to the lowered position D (operated to the lowered position D and operated to the neutral position N), the automatic lifting control means 61 stops and the planting and fertilizing clutches 26, 27 are stopped. Is operated in the shut-off state, and the hydraulic cylinder 4 is extended and the seedling planting device 5 is lowered while the right and left markers 19 are operated in the retracted posture. When the central float 9 comes into contact with the rice field G2, the automatic lifting control means 61 is activated, and the seedling planting device 5 comes into contact with the rice field G2 and stops (the seedling planting device 5 is set at a set height from the rice field G2. So that the seedling planting device 5 automatically moves up and down (so that the detection value of the potentiometer 22 (the vertical distance between the potentiometer 22 and the center float 9) is maintained at the set value). .

  As described above, after operating the operating lever 12 to the lowered position D (operating to the lowered position D and operating to the neutral position N), operating the operating lever 12 to the lowered position D again (to the lowered position D again). When operated to the neutral position N), the planting and fertilization clutches 26 and 27 are operated in the transmission state with the automatic lifting control means 61 activated.

As shown in FIG. 3, the following operation is performed in a state where the height of the seedling planting device 5 detected by the potentiometer 29 is lower than a predetermined height set in advance.
In a state where the right (left) marker 19 is operated to the retracted position, if the operation lever 12 is operated to the right marker position R (left marker position L) for a first set time (relatively short time) or more, the right The (left) marker 19 is operated to the acting posture.
In a state where the right (left) marker 19 is operated to the acting posture, the operation lever 12 is moved to the right marker position R (left marker position L) for a second set time (a time longer than the first set time) or more. When operated, the right (left) marker 19 is operated to the retracted posture.

  As shown in FIG. 3, when the seedling planting device 5 is raised and the height of the seedling planting device 5 detected by the potentiometer 29 is higher than a predetermined height set in advance, The left marker 19 is operated to the retracted posture. In a state where the height of the seedling planting device 5 detected by the potentiometer 29 is higher than a predetermined height set in advance, even if the operation lever 12 is operated to the right and left marker positions R and L as described above. Regardless of this, the right and left markers 19 are maintained in the retracted posture.

[8]
Next, the working mode of the riding type rice transplanter will be described.
For example, as shown in FIG. 6 and FIG. 7, a riding rice transplanter may adopt the following working mode in a square paddy field in plan view.

  For example, the aircraft is first positioned at a position K1 shown in FIG. 6, the seedling planting device 5 is lowered to the surface G2, and the left marker 19 is operated to the action posture (the right marker 19 is the retracted posture). In this state, the planting and fertilizing clutches 26 and 27 are operated in the disconnected state and travel along the ridge B, and the left marker 19 forms an index of the next work process L01 on the paddy field (empty work process LA1). . In the idling work process LA1, the planting and fertilizing clutches 26 and 27 are not operated in the transmission state, but the seedling planting device 5 is moved down to the surface G2 to travel. This is because it is erased by the float 9 of the seedling planting device 5.

  As shown in FIG. 6, when the aircraft reaches the shore from the empty work process LA1, the seedling planting device 5 is lifted from the field surface G2, and the turn LL1 (left direction) is performed, and the seedling planting device 5 is moved to the field surface G2. The planting and fertilizing clutches 26 and 27 are operated to the transmission state to enter the work process L01. In the work process L01, the left marker 19 is operated to the retracted position, the right marker 19 is operated to the operating position, and the aircraft is caused to travel along the index formed on the surface G2 in the empty work process LA1. While planting seedlings and supplying fertilizer to the field surface G2, the index of the next work process L02 is formed on the field surface G2 by the right marker 19.

  As shown in FIG. 6, when the aircraft reaches the heel from the work process L01, the planting and fertilization clutches 26 and 27 are operated in the disconnected state, the seedling planting device 5 is raised from the surface G2, and the turn LL2 (right Direction), the seedling planting device 5 is lowered to the field surface G2, the planting and fertilization clutches 26, 27 are operated in the transmission state, and the operation process L02 is entered. In the work process L02, the right marker 19 is operated to the retracted position, the left marker 19 is operated to the action position, and the aircraft is driven along the index formed on the field G2 in the work process L01. The marker of the next work process L03 is formed on the rice field G2 by the left marker 19 while planting and supplying fertilizer to the rice field G2.

  As shown in FIG. 6 and FIG. 7, a plurality of work strokes L01, L02, L03, L04, L05 and turns LL1 (left direction), LL2 (right direction), LL3 (left direction), LL4 (right direction), When LL5 (left direction) is performed, a portion where planting of seedlings and supply of fertilizer is not performed along the ridge B is formed. In this state, when the aircraft reaches the heel from the work process L05, the planting and fertilization clutches 26 and 27 are operated to be disconnected, the seedling planting device 5 is lifted from the surface G2, and the turn LL6 (right direction). To position the aircraft at the position indicated by K2.

  At the position indicated by K2, the seedling planting device 5 is lowered to the field surface G2, and the planting and fertilizing clutches 26 and 27 are operated in the transmission state to enter the rotating work process LB1. In the turning work process LB1, there is a cocoon B on the left side of the machine, and there are seedlings planted in the work process L05 on the right side of the machine, so the right and left markers 19 are operated to the retracted posture.

  As shown in FIG. 7, when the machine body reaches the heel from the turning work process LB1, the planting and fertilization clutches 26 and 27 are operated in a disconnected state, and the seedling planting device 5 is raised from the rice field G2 to 90 degrees. By turning and moving backward, the body is positioned at position K3, the seedling planting device 5 is lowered to the field surface G2, and the planting and fertilization clutches 26 and 27 are operated in the transmission state to perform the next turning operation. Enter the process LB2. In the turning work process LB2, as in the turning work process LB1, the right and left markers 19 are operated to the retracted posture.

  Thereafter, as shown in FIG. 7, the two round work steps LB3, LB4 (the seedling planting device 5 is lowered to the field surface G2, and the planting and fertilizing clutches 26, 27 are operated to the transmission state. , The right and left markers 19 are operated to the retracted posture). The turning work process LB3 travels in the reverse direction in the empty work process LA1 shown in FIG. 6, and when the turning work process LB4 is completed, the aircraft reaches the position where the turn LL6 (right direction) is performed. Thereafter, the aircraft is taken out from the exit of the paddy field near the position where the turn LL6 (right direction) is performed.

  As described above, for example, in a square paddy field in plan view as shown in FIGS. 6 and 7, one empty work process LA1, a plurality of work processes L01 to L05, and four rotating work processes LB1 to LB4 are performed. By doing, seedlings can be planted in all parts of the paddy field and fertilizer can be supplied to the rice field G2.

[9]
Next, the marker operation means 54 and the work device operation means 55 will be described by turning.
The work device operating means 55 is for operating the planting and fertilizing clutches 26 and 27 to the transmission state based on the detection of the turning end position detecting means 53 as described in [16] described later (turning end). This corresponds to a state in which the working device 5 is operated to the working state based on the detection of the position detecting means 53).

  As described in [13] and [16], which will be described later, the marker operating means 54 operates the right or left marker 19 in the action posture to the retracted posture as the seedling planting device 5 rises from the surface G2. When turning at the heel, the right or left marker 19 on the side opposite to the turning direction of the machine body is operated to the acting posture as the seedling planting device 5 is lowered to the surface G2. .

  In other words, the marker operation means 54 described above, for example, when the aircraft reaches the heel in a state where the right marker 19 is operated to the action posture (the left marker 19 is the retracted posture), as shown in the work process L01 of FIG. As the seedling planting device 5 rises from the surface G2, the right marker 19 is operated to the retracted posture, and the turn LL2 (right direction) is performed to enter the next work process L02. The left marker 19 on the opposite side to the (right direction) is operated to the acting posture.

  For example, the marker operating means 54 is provided with the marker 19 on the right side of the acting posture as the seedling planting device 5 is lifted from the surface G2 in the work strokes L01 and L02 and the turn LL2 (right direction) shown in FIG. When the seedling planting device 5 is lowered to the field surface G2, the side opposite to the right marker 19 operated to the retracted posture as the seedling planting device 5 is lifted from the field surface G2. The left marker 19 is operated to the acting posture.

  As a result, the right or left marker 19 on the side opposite to the turning direction of the machine body is operated to the operating posture, and the seedling planting device 5 (working device) is operated to the retracted posture as it rises from the surface G2. Manipulating the marker 19 on the opposite side of the right or left marker 19 to the acting posture is synonymous.

[10]
Next, in any state with respect to the empty work process LA1, the work processes L01 to L05, and the rotating work processes LB1 to LB4 shown in the previous item [8], FIGS. 6 and 7, the marker operation unit 54 and the work device operation unit 55 are used. A description will be given of whether or not should be in an operating state.

  As shown in FIG. 3, a single setting switch 46 (corresponding to an artificial operation tool) that can be operated artificially is provided in the vicinity of the steering handle 20, and the setting switch 46 is configured to be operated to an operation position and a stop position. The operation position of the setting switch 46 is input to the control device 23. When the setting switch 46 is operated to the operating position, an operating state in which both the marker operating means 54 and the work device operating means 55 are set is set. When the setting switch 46 is operated to the stop position, the marker operating means 54 and the work are operated. A stop state is set in which both of the device operating means 55 stop. Therefore, the setting switch 46 cannot set a state in which the marker operating unit 54 is in the activated state and the work device operating unit 55 is in the stopped state. Similarly, the setting switch 46 cannot set a state in which the marker operating unit 54 is in a stopped state and the work device operating unit 55 is in an operating state.

  As described in the preceding item [8] and as shown in FIG. 6, when entering the work process L01 from the idle work process LA1, the turn LL1 (left direction) is a general (standard) turn that makes a substantially U-turn, The right marker 19 opposite to the left marker 19 operated to the retracted posture in the turn LL1 (left direction) is operated to the acting posture in the work stroke L01 (the left marker 19 is acted in the empty working stroke LA1). On the other hand, in the work process L01, the right marker 19 is operated to the action posture).

  As described in the preceding paragraph [8] and as shown in FIG. 6, when entering the next work process L02 from the work process L01, when entering the next work process L03 from the work process L02, the work process L03 is changed to the next work process L04. When entering, when entering the next work process L05 from the work process L04, the turn LL2 (right direction), LL3 (left direction), LL4 (right direction), LL5 (left direction) is generally a U-turn. It is a (typical) turn.

  As described in the preceding paragraph [8] and as shown in FIG. 6, when entering the next work process L02 from the work process L01, when entering the next work process L03 from the work process L02, the work process L03 is changed to the next work process L04. When entering, when entering the next work process L05 from the work process L04, the marker 19 operated to the retracted position in the turns LL2 (right direction), LL3 (left direction), LL4 (right direction), and LL5 (left direction) Operates the marker 19 on the opposite side to the acting posture in the next work steps L01 to L05.

As described in the preceding item [8] and as shown in FIG. 6, the right marker 19 is operated to the working posture in the work process L01, whereas the left marker 19 is operated to the working posture in the work process L02. In the work process L02, the left marker 19 is operated to the action posture, whereas in the work process L03, the right marker 19 is operated to the action position.
In the work process L03, the right marker 19 is operated to the action posture, whereas in the work process L04, the left marker 19 is operated to the action position. In the work process L04, the left marker 19 is operated to the action posture, whereas in the work process L05, the right marker 19 is operated to the action position (however, as shown in FIGS. 6 and 7, the work process L05 is performed. Then, since the next rotation work process LB1 is entered, the right and left markers 19 may be operated to the retracted posture).

  Accordingly, it is appropriate to set the operating state in which the marker operating means 54 operates when entering the work process L01 from the idle work process LA1 and when entering the next work process L01 to L05 from the work process L01 to L05. Therefore, it is appropriate to set the operating state in which the work device operating means 55 operates. Therefore, the driver may set the operating state in which both the marker operating means 54 and the work device operating means 55 are operated by operating the setting switch 46 to the operating position.

[11]
Next, in any state with respect to the empty work process LA1, the work processes L01 to L05, and the rotating work processes LB1 to LB4 shown in the previous item [8], FIGS. 6 and 7, the marker operation unit 54 and the work device operation unit 55 are used. Will be described below.

As described in the preceding item [8] and as shown in FIGS. 6 and 7, when entering the next turning work process LB2 from the turning work process LB1, entering the next turning work process LB3 from the turning work process LB2 When entering the next turning work process LB4 from LB3, there is a case of turning 90 degrees and moving backward, turning LL1 (left direction) when entering the work process L01 from the empty work process LA1, and work processes L01 to L05. The turn LL2 (right direction), LL3 (left direction), LL4 (right direction), and LL5 (left direction) when entering the next work process L01 to L05 is different.
When entering the next round work process LB1 to LB4 from the round work process KB1 to LB4, the right or left marker 19 is not operated to the action posture, and the right and left marker 19 is operated to the retracted position.

  Accordingly, when entering the next round work process LB1 to LB4 from the round work process LB1 to LB4, it is not appropriate to set an operation state in which the marker operation means 54 is activated, and an operation state in which the work device operation means 55 is activated. It is not appropriate to set Therefore, the driver may set the stop state in which both the marker operation means 54 and the work device operation means 55 are stopped by operating the setting switch 46 to the stop position.

As shown in the description in [8] above and FIGS. 6 and 7, when turning around the work stroke L05 and entering the work stroke LB1, a general (typical) turn where the turn LL6 (right direction) makes a substantially U-turn. It is. However, in the rotation work process LB1, the right and left markers 19 are operated to the retracted posture.
Accordingly, when the driver turns from the work stroke L05 and enters the work stroke LB1, the driver operates the setting switch 46 to the stop position to set a stop state in which both the marker operation means 54 and the work device operation means 55 are stopped. Good.

[12]
Next, an operating state in which both the marker operating means 54 and the work device operating means 55 described in the previous items [9] [10] [11] are operated will be described.
As shown in FIG. 3, the control device 23 includes a body position detection means 51, a turning start position detection means 52, a turning end position detection means 53, a marker operation means 54, a work device operation means 55, a turning direction detection means 56, and a memory. Means 57 are provided. A display lamp 64 is provided in the vicinity of the steering handle 20 and a buzzer 67 is provided.

  In the state where the elevating lever 11 is operated to the automatic position and the setting switch 46 is operated to the operating position, the machine body position detecting means 51, the turning start position detecting means 52, the turning end position detecting means 53, the marker operating means 54, the work The device operation means 55, the turning direction detection means 56, the storage means 57, the display lamp 64, and the buzzer 67 operate as described in [13] to [16] below.

  As shown in FIG. 3, the airframe position detection means 51 includes the airframe position Y1 in the advancing direction (+ Y) (−Y) of the airframe in the idle work process LA1 and the work processes L01 to L05 (the advancing direction of the airframe before the start of turning). (In other words, the coordinates of the aircraft in the direction of travel of the aircraft before the start of turning are detected). As described in [13] to [16] below, the position Y1 of the body in the advancing direction (+ Y) (−Y) of the body in the empty work process LA1 and work processes L01 to L05 is performed by the machine position detection unit 51. Is detected.

  In a riding type rice transplanter equipped with a six-row type seedling planting device 5, turning LL1 (left direction), LL2 (right direction), LL3 (left direction), LL4 (right direction), as shown in FIG. As shown in FIG. 8, LL5 (left direction) is composed of a first half turning stroke L1 and a second half turning stroke L2. The first half turning stroke L1 and the second half turning stroke L2 will be described in the following [13] to [16], with the turning LL2 (right direction) performed between the work strokes L01 and L02 as a representative.

[13]
Next, the turning stroke L1 in the first half will be described with reference to FIGS.
When the setting switch 46 is operated to the operating position (step S1), the display lamp 64 is turned on (step S2), and when the setting switch 46 is operated to the stop position (step S1), the display lamp 64 is turned off (step S3). When the aircraft is positioned at the position K1 shown in FIG. 6 and the seedling planting device 5 is lowered to the field surface G2 to start the empty work process LA1, the driver operates the operation lever 12 as described in [7] above. The left marker 19 is manipulated to the action posture.

In the work process L01, the elevating lever 11 is operated to the automatic position, and the setting switch 46 is operated to the operating position (step S1). The state where the seedling planting device 5 is lowered to the surface G2 (corresponding to the working state of the working device), the operating state of the automatic lifting control means 61, the transmission state of the planting and fertilizing clutches 26, 27 (corresponding to the working state of the working device) ), The transmission state of the right and left side clutches 40, the right marker 19 is in the operating position, the left marker 19 is operated in the retracted position, and the display lamp 64 is lit ( Step S2).
As shown in FIG. 6, “turning direction of the airframe (leftward direction)” is stored in the storage means 57 by performing the turning LL1 (leftward direction) between the empty work stroke LA1 and the work stroke L01. (Step S13).

  When the aircraft reaches the heel in the above-described state, the driver operates the operation lever 12 to the raised position U (operated to the raised position U and to the neutral position N) (step S4). When the operating lever 12 is operated to the raised position U (operated to the raised position U and operated to the neutral position N) (step S4), the buzzer 67 is intermittently operated (step S5), and the planting and fertilizing clutch 26, 27 is operated to the shut-off state (step S6) (corresponding to the non-working state of the working device), the automatic lifting control means 61 stops (step S7).

  The hydraulic cylinder 4 is contracted to raise the seedling planting device 5 from the surface G2 (step S8) (corresponding to the non-working state of the working device), and the marker operating means 54 operates the right marker 19 to the retracted position. (Step S9) (corresponding to a state in which the marker 19 on the right or left of the acting posture is operated to the retracted posture as the working device 5 rises from the surface G2). When the potentiometer 29 detects that the seedling planting device 5 has reached the upper limit position, the hydraulic cylinder 4 automatically stops.

[14]
Next, following the previous item [13], the first half of the turning stroke L1 will be described with reference to FIGS.
When an operation signal due to the operation lever 12 being moved to the raised position U is input to the control device 23 (corresponding to the start of turning from the work stroke L01), the turning start position detecting means 52 causes the work strokes L01 and L02 to be detected. The position Y1 of the body in the traveling direction (+ Y) (−Y) of the body is set to “0 (origin)”, and “0 (origin)” is detected (set) as the turning start position E1 (step S101). At the same time, “0 (origin)” is detected (set) as the turning end position E3 (step S102).

  When the driver operates the operating lever 12 to the raised position U, the steering handle 20 is operated almost simultaneously, the right and left front wheels 1 (steering members 41) are steered in the turning direction, and the first half turning stroke L1. to go into. When the right and left front wheels 1 (steering member 41) are steered to the right (left) steering limit A3 side beyond the right (left) set angle A2 (step S10), the previous item [2] In the state where the side clutch 40 on the outer side of the turn is operated in the transmission state, the side clutch 40 on the turn center side is operated in the disengaged state (step S11).

When the turning start position E1 is detected (set) in step S101, the machine body position detection means 51 performs the machine body in the traveling direction (+ Y) (−Y) of the machine in the work strokes L01 and L02 based on the following equation 1. Detection of the position Y1 is started (step S103).
Formula 1: Y1 = R * SIN (θ)
R: turning radius of the aircraft θ: angle of movement of the aircraft from the turning start position E1

  As shown in FIG. 9A, when the steering angle A from the straight position A1 of the right and left front wheels 1 (steering member 41) is determined, the turning center C of the fuselage is the right and left rear wheels 2 It is determined that the vehicle is positioned on an extension line of the axle 65 (see FIG. 2), and the wheel bases W (the axles of the right and left front wheels 1 and the axles 65 of the right and left rear wheels 2 (see FIG. 2) 2) and the steering angle A from the straight position A1 of the right and left front wheels 1 (steering member 41) is detected. When the turning center C of the airframe is detected, the distance between the left and right center of the airframe and the turning center C of the airframe is detected as the turning radius R of the airframe.

As shown in FIGS. 9A and 9B, in the state where the turning center C and the turning radius R of the airframe are detected, the pulse of the rotation speed sensor 50 on the turning center side (the rotation speed of the rear wheel 2 on the turning center side). ) To detect the travel distance G of the aircraft (corresponding to the arc portion with respect to the turning radius R of the aircraft), and based on the turning center C of the aircraft and the turning radius R and the traveling distance G of the aircraft, the movement angle θ of the aircraft is Detected. As described above, the position Y1 of the airframe in the forward direction (+ Y) (−Y) of the airframe in the work strokes L01 and L02 is detected based on Equation 1 based on the turning radius R and the movement angle θ of the airframe (step S103). ).
Thus, the position of the aircraft in the traveling direction (+ Y) (−Y) of the aircraft in the work strokes L01 and L02 when the movement angle θ of the aircraft is in the range of 0 degrees (turning start position E1) to 90 degrees (boundary position E2). Y1 is in a state of moving away from the turning start position E1 to (+ Y).

[15]
Next, following the previous item [14], the first half of the turning stroke L1 will be described with reference to FIGS.
When the turning start position E1 is detected (set) in step S101, a pulse (the number of revolutions of the rear wheel 2 outside the turning) from the turning start position E1 is detected (accumulated). Based on the value and the steering angle A from the straight travel position A1 of the right and left front wheels 1 (steering member 41), the turning angle F1 of the airframe is detected (integrated) from "0" (step S104).

  In this case, the angle of the current direction of the aircraft relative to the orientation of the aircraft at the turning start position E1 (work process L01) is determined by the pulse of the rotation speed sensor 50 outside the turning (after the turning outside). The number of rotations of the wheel 2) and the steering angle A from the straight travel position A1 of the right and left front wheels 1 (steering member 41) are detected, and this detected value is detected (integrated) as the turning angle F1 of the fuselage. (Step S104).

  If the turning angle F1 of the airframe is 90 degrees, the direction of the airframe is right side to the direction of the airframe at the turning start position E1 (work process L01), and the turning angle F1 of the airframe is 180 degrees. If so, the direction of the machine body is opposite to the direction of the machine body at the turning start position E1 (work process L01) (work process L02).

  When the pulse of the rotation speed sensor 50 on the outside of the turn (the rotation speed of the rear wheel 2 on the outside of the turn) increases in a state where the right and left front wheels 1 (steering member 41) are steered in the turning direction (integrated). Then, it is detected (integrated) that the turning angle F1 of the airframe has increased by the increment of the pulse of the rotation speed sensor 50 outside the turning (the rotation speed of the rear wheel 2 outside the turning). Conversely, in the state where the right and left front wheels 1 (steering member 41) are steered to the straight travel position A1, the pulse of the rotation speed sensor 50 on the outside of the turn (the rotation speed of the rear wheel 2 on the outside of the turn) increases. However (even if integrated), it is detected (integrated) that the aircraft has just moved straight and that the turning angle F1 of the aircraft has not changed.

[16]
Next, the latter turning process L2 will be described with reference to FIGS.
If the turning angle F1 of the airframe exceeds 90 degrees (boundary position E2), it is determined that the airframe has entered the latter turning stroke L2. Since the direction of the airframe L2 in the second half is opposite to the direction of the airframe in the first half of the turning stroke L1, the position Y1 of the airframe in the moving direction (+ Y) (−Y) of the airframe in the work strokes L01 and L02 is In this state, the vehicle approaches the turning start position E1 (turning end position E3).

  In this case, when the turning angle F1 of the airframe reaches a set turning angle FA1 (for example, 100 degrees to 150 degrees) (step S12), it is determined that the turning at the shore is performed normally, and the potentiometer 47 detects the turning. Based on the value, the turning direction of the airframe is detected by the turning direction detection means 56, and the detected turning direction of the airframe is stored (updated) in the storage means 57 (step S13). In the turning LL2 (right direction), the storage means 57 stores (updates) “the turning direction of the airframe (right direction)”.

  When entering the second half of the second turning stroke L2, the driver operates the steering handle 20 to operate the right and left front wheels 1 (steering member 41) to the straight advance position A1 beyond the right (left) set angle A2. (Step S14). As a result, the side clutch 40 on the turning center side is operated to the transmission state (step S15), and the aircraft enters the straight traveling state. When the aircraft enters a straight-ahead state, the calculation according to Equation 1 is not performed, and the average value (negative value) of the pulses of the right and left rotation speed sensors 50 (the rotation speed of the right and left rear wheels 2) is the work process. It is detected as the position Y1 of the aircraft in the traveling direction (+ Y) (−Y) of the aircraft of L01 and L02.

  When the potentiometer 47 detects that the right and left front wheels 1 (steering member 41) have been operated to the straight advance position A1 beyond the right (left) setting angle A2 (step S14), planting and The seedling planting device 5 is automatically lowered while maintaining the shut-off state of the fertilizer clutches 26 and 27 (step S16).

  When the height of the seedling planting device 5 detected by the potentiometer 29 becomes lower than a predetermined height set in advance (see [7] in the previous section) due to the lowering of the seedling planting device 5, the marker operating means 54 Then, the left marker 19 on the opposite side to the “turning direction (right direction) of the machine body” stored in the storage means 57 is operated to the acting posture (step S17) (the lowering of the work device 5 to the surface G2) Accordingly, this corresponds to a state in which the marker 19 on the side opposite to the right or left marker 19 operated to the retracted posture as the working device 5 is moved up from the field G2 is operated to the working posture).

  When the center float 9 comes into contact with the rice field G2 due to the lowering of the seedling planting device 5, the automatic lifting control means 61 is activated, and the seedling planting device 5 comes into contact with the rice field G2 and stops (step S18). (Seedling planting device 5 is maintained at the set height from the field G2 (so that the detection value of the potentiometer 22 (the vertical distance between the potentiometer 22 and the center float 9) is maintained at the set value)) The state where the planting device 5 automatically moves up and down).

When the turning end position detecting means 53 detects that the position Y1 of the airframe in the advancing direction (+ Y) (−Y) of the airframe in the work strokes L01 and L02 has reached the turning end position E3 (Step S19) The planting and fertilizing clutches 26 and 27 are operated in the transmission state by the device operating means 55 (step S20) (corresponding to the state in which the work devices 5 and 15 are operated to the working state based on the detection by the turning end position detecting means 53). .
Thereby, the buzzer 67 is stopped (step S21), and seedling planting by the seedling planting device 5 (rotating case 7, planting arm 8) and supply of fertilizer to the rice field G2 by the feeding unit 15 are started. Then, the next work process L02 is entered.

[17]
Next, the state where the seedling planting device 5 is raised from the field surface G2 and lowered to the field surface G2 in the middle of the work steps L01 to L05 shown in FIG. 6 will be described.
For example, in the middle of the work process L01 shown in FIG. 6 (the right marker 19 is operated to the acting posture and the left marker 19 is operated to the retracted posture), to the seedling planting device 5 (the seedling table 10). In order to replenish seedlings, it is assumed that the airframe is temporarily stopped, the planting and fertilization clutches 26 and 27 are operated in a disconnected state, and the seedling planting device 5 is raised from the surface G2.

  In this case, the marker operation means 54 operates the right marker 18 to the retracted posture. As shown in FIG. 6, “turning direction of the airframe (leftward direction)” is stored in the storage means 57 by performing the turning LL1 (leftward direction) between the empty work stroke LA1 and the work stroke L01. (Step S13).

  Next, when replenishment of seedlings to the seedling planting device 5 (seedling platform 10) is finished and the seedling planting device 5 is lowered to the surface G2, it is stored in the storage unit 57 by the marker operating unit 54. The right marker 19 on the side opposite to the “turning direction of the airframe (leftward direction)” is operated to the acting posture. As long as “the turning direction of the machine body (leftward direction)” is stored in the storage unit 57, the marker operation unit 54 stores the seedling planting device 5 even if the seedling planting device 5 is lifted from the field surface G2 and lowered to the field surface G2. The right marker 19 on the side opposite to the “turning direction (left direction) of the aircraft” stored in the means 57 is operated to the acting posture.

  Thereby, in order to replenish seedlings to the seedling planting device 5 (seedling table 10), the seedling planting device 5 is raised upward from the field surface G2 and lowered to the field surface G2 during the work process L01 to L05. However, there is no change in the action and retracted posture of the right or left marker 19, and the action and retracted posture of the right and left marker 19 are exchanged with those before ascending from the surface G2 of the seedling planting device 5. A state does not arise.

[First Alternative Embodiment for Implementing the Invention]
Instead of the setting switch 46 of the above-mentioned [DETAILED DESCRIPTION], the following configuration may be used.
As shown in FIG. 10, a first setting switch 68 (corresponding to a first human operation tool) and a second setting switch 69 (corresponding to a second human operation tool) that can be operated artificially are provided in the vicinity of the steering handle 20. The operation positions of the first and second setting switches 68 and 69 are input to the control device 23.

  As shown in FIG. 10, when the first setting switch 68 is operated to the operating position, an operating state in which the marker operating means 54 operates is set, and when the first setting switch 68 is operated to the stop position, the marker operating means 54 stops. The stop state to be set is set. When the second setting switch 69 is operated to the operating position, an operating state in which the work device operating means 55 is operated is set, and when the second setting switch 69 is operated to the stop position, a stop state in which the working device operating means 55 is stopped is set. Is set.

  In this case, when one of the first and second setting switches 68 and 69 is operated from the stop position to the operating position, the other of the first and second setting switches 68 and 69 is operated from the stop position to the operating state in conjunction with this operation. As shown, the first and second setting switches 68 and 69 are linked (if the other of the first and second setting switches 68 and 69 is operated to the operating position, the first and second setting switches The other of 68 and 69 is maintained in the operating position).

  When one of the first and second setting switches 68 and 69 is operated from the operating position to the stop position, the other of the first and second setting switches 68 and 69 is operated from the operating position to the stop position in conjunction with this. The first and second setting switches 68 and 69 are linked to each other (if the other of the first and second setting switches 68 and 69 is operated to the stop position, the first and second setting switches 68 and 69 are connected). Is kept in the stop position).

  The first setting switch 68 may be eliminated, and the function of the first setting switch 68 may be provided in the operation lever 12. In this case, each time the operating lever 12 is operated (held) over the relatively long set time (second set time) at the raised position U or the right and left marker positions R and L, the marker operating means 54 is activated. The operation state to be performed and the stop state to be stopped are configured to be alternately set.

[Second embodiment for carrying out the invention]
In the above-mentioned [Mode for Carrying Out the Invention] [First Alternative Mode for Carrying Out the Invention], the storing means 57 does not store the turning direction of the aircraft, but the marker operating means 54 and the storing means 57 are described below. You may comprise so that it may operate | move like.

  When the right or left marker 19 of the acting posture is operated to the retracted posture as the seedling planting device 5 rises from the surface G2, the right or left marker 19 operated to the retracted posture is stored in the storage means 57. . As the seedling planting device 5 is lowered to the field surface G2, the right or left marker 19 on the opposite side of the right or left marker 19 stored in the storage means 57 is operated to the action posture (of the working device 5). This corresponds to a state in which the marker 19 on the side opposite to the right or left marker 19 which is operated to the retracted posture with the rise from the surface G2 is operated to the acting posture).

[Third Another Mode for Carrying Out the Invention]
In step S103 of FIG. 4 in the above-mentioned [Mode for Carrying Out the Invention] [First Alternative Mode for Carrying Out the Invention] [Second Alternative Mode for Carrying Out the Invention], based on Equation 1, Instead of configuring the body position detection means 51 so as to detect the position Y1 of the body in the traveling direction (+ Y) (−Y) of the body in the work process LA1 and work processes L01 to L05, the body position detection means 51, The turning start position detecting unit 52 and the turning end position detecting unit 53 may be configured as follows.

When an operation signal due to the operation lever 12 being moved to the raised position U is input to the control device 23 (step S4), integration of detection values of the rotation speed sensor 50 on the turning center side is started (turning position detecting means). In addition to this, when the integration of detection values of the rotation speed sensor 50 on the turning center side (corresponding to the turning start position E1) is set as the origin (corresponding to the turning start position detecting means 52), A set value (corresponding to the turning end position E3) is set for the origin.
The turn LL1 (left direction), LL2 (right direction), LL3 (left direction), LL4 (right direction), LL5 (left direction), and turn LL6 (right direction) shown in FIG. The radius and the travel distance of the aircraft are recognized, and the detection value of the rotation speed sensor 50 on the turning center side is recognized as a value representing the position of the aircraft, and the above-described set values are set in advance.

Before the detected value (integrated value) of the rotation speed sensor 50 on the turning center side reaches the set value, the right and left front wheels 1 (steering member 41) go straight beyond the right (left) set angle A2. The side clutch 40 on the turning center side is operated in the transmission state, and the seedling planting device 5 is automatically lowered.
Next, when the detected value (integrated value) of the rotation speed sensor 50 on the turning center side reaches the set value described above, it is determined that the turning end position E3 has been reached (corresponding to the turning end position detecting means 53), and planting is performed. And the fertilization clutches 26 and 27 are operated to a transmission state.

[Fourth embodiment for carrying out the invention]
In the above-mentioned [Mode for Carrying Out the Invention] [First Alternative Mode for Carrying Out the Invention] [Second Alternative Mode for Carrying Out the Invention], the right and left front wheels 1 (steering members 41) Every time the steering angle A from the rectilinear position A1 changes, the turning center C and turning radius R of the airframe, the distance traveled by the airframe G, the detection of the moving angle θ of the airframe, the empty work stroke LA1 and the work stroke L01 according to Equation 1 Instead of detecting the position Y1 of the aircraft in the advancing direction (+ Y) (−Y) of the aircraft of L05, instead of this, the following configuration may be adopted.

In the first half turning stroke L1 (second half turning stroke L2) shown in FIG. 8, there are nine regions (0 ° to 10 ° regions, 10 ° to 20 °) having a range of 10 degrees (corresponding to a predetermined angle range). Degree area, 20 degree to 30 degree area, 30 degree to 40 degree area, 40 degree to 50 degree area, 50 degree to 60 degree area, 60 degree to 70 degree area, 70 degree to 80 degree area The turning radius R of one aircraft (the turning radius R of the aircraft corresponding to the central angle of the region) is set in each of the nine regions.
For example, in the region of 0 to 10 degrees, the turning radius R of the aircraft when the steering angle A from the straight traveling position A1 of the right and left front wheels 1 (steering member 41) is 5 degrees (FIG. 9 (a) ( b) is set as the turning radius R of one aircraft in the range of 0 to 10 degrees.

  When the steering angle A from the rectilinear position A1 of the right and left front wheels 1 (steering member 41) is in the region of 0 degrees to 10 degrees, the rectilinear position A1 of the right and left front wheels 1 (steering member 41) Even if the steering angle A changes, the turning radius R of one aircraft in the range of 0 to 10 degrees is used regardless of this, and the travel distance G of the aircraft, the detection of the movement angle θ of the aircraft, The position Y1 of the airframe in the advancing direction (+ Y) (−Y) of the airframe in the empty work stroke LA1 and work strokes L01 to L05 is detected.

  At 10 degrees to 20 degrees, as described above, the turning distance R of one aircraft in the region of 10 degrees to 20 degrees is used to detect the traveling distance G of the aircraft and the movement angle θ of the aircraft. The position Y1 of the airframe in the advancing direction (+ Y) (−Y) of the airframe in the empty work stroke LA1 and the work strokes L01 to L05 according to Equation 1 is detected.

[Fifth alternative embodiment for carrying out the invention]
Instead of the above-mentioned [fourth alternative embodiment for carrying out the invention], the following configuration may be adopted.
In the first half turning stroke L1 (second half turning stroke L2) shown in FIG. 8, there are nine regions (0 ° to 10 ° regions, 10 ° to 20 °) having a range of 10 degrees (corresponding to a predetermined angle range). Degree area, 20 degree to 30 degree area, 30 degree to 40 degree area, 40 degree to 50 degree area, 50 degree to 60 degree area, 60 degree to 70 degree area, 70 degree to 80 degree area The turning radius R of one airframe (the turning radius R of the airframe corresponding to the maximum angle of the area) is set in each of the nine areas.
For example, in the region of 0 degrees to 10 degrees, the turning radius R of the aircraft when the steering angle A from the straight traveling position A1 of the right and left front wheels 1 (steering member 41) is 10 degrees (FIG. 9A ( b) is set as the turning radius R of one aircraft in the range of 0 to 10 degrees.

  Even if the steering angle A of the right and left front wheels 1 (steering member 41) from the rectilinear position A1 enters the range of 0 degrees to 10 degrees from 0 degrees (straight travel position A1), the empty work process LA1 and work The position Y1 of the airframe in the traveling direction (+ Y) (−Y) of the airframe in the strokes L01 to L05 is not detected. When the steering angle A from the rectilinear position A1 of the right and left front wheels 1 (steering member 41) reaches 10 degrees, the turning radius R and 10 degrees of one airframe in the range of 0 degrees to 10 degrees gives the formula 1 is used to detect the position Y1 of the airframe in the advancing direction (+ Y) (−Y) of the airframe in the empty work process LA1 and work processes L01 to L05.

  At 10 degrees to 20 degrees, using the turning radius R of the airframe in the region of 10 degrees to 20 degrees, as described above, at 20 degrees, 30 degrees, ..., 10 degrees to 20 degrees Based on the turning radius of one aircraft in the region of..., The position Y1 of the aircraft in the advancing direction (+ Y) (−Y) of the aircraft in the empty work process LA1 and work processes L01 to L05 based on Equation 1. Detection is performed.

[Sixth Embodiment for Implementing the Invention]
In the above-mentioned [Mode for Carrying Out the Invention] [First Alternative Mode for Carrying Out the Invention] to [Fifth Alternative Mode for Carrying Out the Invention], the following configuration may be adopted.
If the right and left front wheels 1 (steering member 41) are steered beyond the right (left) set angle A2 before the operating lever 12 is moved to the raised position U, the side on the turning center side At the same time when the clutch 40 is operated in the disconnected state, the planting and fertilizing clutches 26 and 27 are automatically operated in the disconnected state, and the seedling planting device 5 is automatically raised from the field surface G2. May be.

  In this case, when the potentiometer 47 detects that the right and left front wheels 1 (steering member 41) have been steered beyond the right (left) set angle A2, the turning position detector 52 starts turning. The turning start position E1 is detected (set), and the machine body position detecting means 51 is configured to start operation.

[Seventh embodiment for carrying out the invention]
In the above-mentioned [Mode for Carrying Out the Invention] [First Alternative Mode for Carrying Out the Invention] to [Sixth Alternative Mode for Carrying Out the Invention], the following configuration may be adopted.
For example, when a working clutch that transmits power to the working device is not provided, such as a working device such as a grooving device, the state in which the working device is raised from the field surface G2 is set to the non-working state, and the working device is lowered to the surface G2. You may comprise so that it may become a working state.

  With this configuration, the operating lever 12 is operated to the raised position U, or the right and left front wheels 1 (steering member 41) are steered beyond the right (left) set angle A2. Thus, the work device is configured to rise from the field surface G2 (non-working state) and to be lowered to the field surface G2 based on the detection of the turning end position E3 (working state).

  In the present invention, a rotary cultivator (corresponding to a working device) can be connected to a rotary tiller device (corresponding to a working device) at the rear part of the machine body and a cutting part (corresponding to a working device) can be supported to be lifted and lowered at the front part of the machine body. It can also be applied to work vehicles such as combines. It is also possible to configure the body position detection means 51 by GPS. In place of the powdery fertilizer in the hopper 14, the present invention can be applied to a liquid fertilizer or a work vehicle containing powdered or liquid chemicals, seeds, or the like.

DESCRIPTION OF SYMBOLS 1 Front wheel 5,15 Work apparatus 19 Marker 46 Human operation tool 47 Steering angle detection means 50 Travel distance detection means 51 Airframe position detection means 53 Turning end position detection means 54 Marker operation means 55 Work apparatus operation means 68 1st human operation tool 69 Second-handed operation tool A Steering angle A1 Straight running position C Aircraft turning center E3 Turning end position G Aircraft travel distance G2 Surface L1, L2 Aircraft turning stroke L01 to L05 Work stroke R Aircraft turning radius Y1 Aircraft turning Stroke position Y1 Aircraft position in the direction of travel before the start of turning + Y, -Y Aircraft travel direction θ Aircraft travel angle

  The present invention relates to a structure of turning in a paddy field in a paddy field work vehicle such as a riding type rice transplanter or a riding type direct seeder.

  In a riding rice transplanter, which is an example of a paddy field work vehicle, the planting clutch that transmits power to the seedling planting device (corresponding to the working device) is shut off when the operation process is completed and the aircraft reaches the edge. The state is operated (corresponding to the non-working state), the seedling planting device is raised from the paddy surface (corresponding to the non-working state), and turning is performed (turning that makes a substantially U-turn). When the turning is finished, the seedling planting device is lowered to the surface (corresponding to the working state), the planting clutch is operated to the transmission state (corresponding to the working state), and the next work process is started.

  For example, in Patent Document 1, a riding type rice transplanter is provided with right and left rotational speed sensors (50 in FIGS. 2 and 6 of Patent Document 1) for detecting the rotational speeds of the right and left rear wheels. When the aircraft reaches the heel and starts turning, the detection (integration) of the travel distance of the aircraft is started by the rotation speed sensor on the turning center side (steps S101 and S102 in FIG. 7 of Patent Document 1).

  When the travel distance of the aircraft reaches the set distance, it is determined that the turn has been completed, and the seedling planting device automatically descends to the paddy surface (step S14 in FIG. 8 of Patent Document 1) (corresponding to the working state), The attached clutch (26 in FIG. 6 of Patent Document 1) is automatically operated to the transmission state (Step S20 in FIG. 8 of Patent Document 1) (corresponding to the non-working state), and seedling planting by the seedling planting device is performed. It starts automatically. Thus, at the end of turning, the driver does not have to lower the seedling planting device to the rice field or operate the planting clutch to the transmission state by using a lifting lever or the like.

In Patent Document 1, right and left markers that can be operated in an action posture in which an indicator for the next work process is formed on the surface by touching the surface and a retracted posture upward from the surface (FIGS. 1 and 6 of Patent Document 1). 19).
In this case, in Patent Document 2, auto marker means (corresponding to marker operation means) is provided for the right and left markers, and the auto marker means operates as follows.

  For example, when the working device is raised from the surface in a state where the left marker is operated to the acting posture and the right marker is operated to the retracted posture, the left marker is operated to the retracted posture (the right marker is also stored) Maintained in posture). Next, when the turning is completed and the working device is lowered to the surface, the right marker is operated to the action posture while the left marker is maintained in the retracted posture. This eliminates the need for the driver to operate the right or left marker to the action posture by operating the operation lever when the working device is lowered to the surface.

JP 2008-230302 A Japanese Patent Application Laid-Open No. 2004-187637

If the present invention is provided with paddy field work vehicle Te smell, ability to right or left of the marker is operated automatically acting posture,及Beauty, a function of work device is operated automatically working state, both It is an object of the present invention to be configured so that the function can be appropriately set to the activated and stopped states.

[I]
(Constitution)
The first feature of the present invention is that the paddy field vehicle is configured as follows.
The work device provided in the aircraft is configured to be operable in working and non-working states,
It is equipped with right and left markers that can be operated in an action posture for grounding to the surface and forming an index of the next work process on the surface and a retracted posture above the surface,
As the working device rises from the surface, the right or left marker of the acting posture is operated to the retracted posture, and as the transition to the next work process occurs , the working device rises from the surface. Marker operating means for operating the marker on the opposite side of the right or left marker operated in the retracted posture into the acting posture ;
Bei example and a working device operation means for operating the working state the working device of the non-working state, based on the turning end of the fuselage,
An operating state in which both the marker operating means and the work device operating means are activated, and a stop state in which both the marker operating means and the work device operating means are stopped. Equipped with human operation tools.

The second feature of the present invention resides in the following configuration in a paddy field work vehicle.
The work device provided in the aircraft is configured to be operable in working and non-working states,
It is equipped with right and left markers that can be operated in an action posture for grounding to the surface and forming an index of the next work process on the surface and a retracted posture above the surface,
As the working device rises from the surface, the right or left marker of the acting posture is operated to the retracted posture, and as the transition to the next work process occurs , the working device rises from the surface. Marker operating means for operating the marker on the opposite side of the right or left marker operated in the retracted posture into the acting posture ;
Bei example and a working device operation means for operating the working state the working device of the non-working state, based on the turning end of the fuselage,
A first manipulator that is operated artificially by operating the marker operating means in an activated and stopped state, and a second manipulatively operated by operating the working device operating means in an activated and stopped state. With human operation tools,
When one of the first and second artificial operating tools is operated, the other of the first and second artificial operating tools is operated in conjunction with this, and the first and second artificial operating tools are operated. When one of the operating tools is operated in a stopped state, the first and second artificial operating tools are linked so that the other one of the first and second artificial operating tools is operated in a stopped state. To do.

(Function)
[I] -1
In a riding type rice transplanter that is an example of a paddy field work vehicle, for example, a work form as shown in FIGS. 6 and 7 may be employed in a square paddy field in plan view.
For example, the aircraft is first positioned at a position K1 shown in FIG. 6, the seedling planting device 5 is lowered to the paddy surface, and the left marker 19 is operated to the acting posture (the right marker 19 is the retracted posture). In this state, the planting clutch is operated in the disengaged state and travels along the saddle B, and the left marker 19 forms an index of the work process L01 on the paddy field (empty work process LA1). Even if the planting clutch is not operated in the idle operation stroke LA1, the seedling planting device 5 is moved down to the paddy field so that the passage marks of the front and rear wheels are erased by the float of the seedling planting device 5. Because of that.

  For example, as shown in FIG. 6, when the aircraft reaches the heel from the empty work process LA1, the seedling planting device 5 is raised from the surface to perform the turning LL1 (the left marker 19 is operated to the retracted position), The seedling planting device 5 is lowered to the surface, the planting clutch is operated in the transmission state, and the operation process L01 is entered. In the work process L01, the right marker 19 is operated to the working posture (the left marker 19 is in the retracted posture), and the seedling is planted by running the aircraft along the index formed on the surface in the empty work process LA1. While performing, the index of the next work process L02 is formed on the rice field by the right marker 19.

  For example, as shown in FIG. 6, when the aircraft reaches the heel from the work process L01, the planting clutch is operated in a disengaged state, the seedling planting device 5 is lifted from the surface, and the turn LL2 is performed (right marker 19 The seedling planting device 5 is lowered to the paddy surface, the planting clutch is operated to the transmission state, and the next work process L02 is entered. In the work process L02, the left marker 19 is operated to the action posture (the right marker 19 is in the retracted position), and the plant is planted by running the aircraft along the index formed on the surface in the previous work process L01. While performing the above, an indicator for the next work process L03 is formed on the surface by the left marker 19.

[I] -2
For example, as shown in FIGS. 6 and 7, when a plurality of work steps L01, L02, L03, L04, and L05 and turns LL1, LL2, LL3, LL4, and LL5 are performed, seedlings are planted along four ridges B A portion that is not formed is formed. In this state, when the aircraft reaches the heel from the work process L05, the planting clutch is operated to be disengaged, the seedling planting device 5 is lifted from the surface and the turn LL6 is performed, and the aircraft is positioned at the position indicated by K2. .
At the position indicated by K2, the seedling planting device 5 is lowered to the paddy surface, the planting clutch is operated in the transmission state, and the rotating work process LB1 is started. In the turning work process LB1, there is a cocoon B on the left side of the machine, and there are seedlings planted in the work process L05 on the right side of the machine, so the right and left markers 19 are operated to the retracted posture.

  For example, as shown in FIG. 7, when the aircraft reaches the heel from the turning operation process LB1, the planting clutch is operated to be disconnected, and the seedling planting device 5 is raised from the surface to turn and reverse 90 degrees. As a result, the machine body is positioned at the position K3, the seedling planting device 5 is lowered to the surface, the planting clutch is operated in the transmission state, and the turning work process LB2 is started. In the turning work process LB2, as in the previous turning work process LB1, the right and left markers 19 are operated to the retracted posture.

For example, as shown in FIG. 7, in the same manner, the two round work steps LB3 and LB4 (the seedling planting device 5 is lowered onto the surface, the planting clutch is operated in the transmission state, and the right and left markers 19 are moved. To the retracted position). The turning work process LB3 travels in the reverse direction in the idle work process LA1 shown in FIG. 6, and when the turning work process LB4 ends, the aircraft reaches the position where the turning LL6 has been performed. Thereafter, the aircraft is taken out from the exit of the paddy field in the vicinity of the position where the turn LL6 is performed.
As described above, for example, in a square paddy field in plan view as shown in FIGS. 6 and 7, one empty work process LA1, a plurality of work processes L01 to L05, and four rotating work processes LB1 to LB4 are performed. By doing so, seedlings can be planted in all parts of the paddy field.

[I] -3
As described in the preceding item [I] -1, for example, in a square paddy field in a plan view as shown in FIG. 6, when entering the work process L01 from the empty work process LA1, a general turning LL1 makes a substantially U-turn. (Typical) turning, the marker 19 on the side opposite to the marker 19 operated to the retracted posture in the turning LL1 is operated to the acting posture in the working stroke L01 (the left marker 19 is acted on in the empty working stroke LA1) (In contrast to operating in the posture, the right marker 19 is operated in the working posture in the work stroke L01).
Similarly, when entering from the work process to the next work process, the turns LL2 to LL5 are general (typical) turns that are substantially U-turns, and are opposite to the markers operated to the retracted posture in the turns LL2 to LL5. The side marker is operated to the acting posture in the next work process.

Thus, it is appropriate that the working device is automatically operated to the working state when entering the work process from the empty work process and when entering the next work process from the work process. It is appropriate to automatically operate the marker on the opposite side of the right or left marker that has been operated to the retracted posture with the rising of the position.
In other words, it is not appropriate to set the marker operating means to the operating state and set the working device operating means to the stopped state, and similarly set the marker operating means to the stopped state and operate the working device operating means. It is not appropriate to set the state.

According to the first feature of the present invention, it is possible to set an operating state in which both the marker operating means and the work device operating means are operated by a single human operation tool.
According to the second feature of the present invention, when the marker operating means is set to the operating state by the first human operating tool, the second human operating tool is operated in conjunction with this, and the work device operating means is set to the operating state. The When the work device operating means is set to the operating state by the second human operating tool, the first human operating tool is operated in conjunction with this, and the marker operating means is set to the operating state.

  Therefore, according to the first and second features of the present invention, when entering the work process from the empty work process, and when entering the next work process from the work process, the driver operates the human operation tool (first human operation tool). By operating the (second artificial operating tool), it is possible to set an operating state in which both the marker operating means and the work device operating means are operated. The marker operating means is operated by operating one artificial operating tool. There is no need to set the operating state, and then operate another human operating tool to set the working device operating means to the operating state.

  According to the first and second features of the present invention, by operating the human operation tool (first and second human operation tool), the marker operation means is set to the operating state and the work device operation means is set to the stop state. The marker operating means cannot be set to the stopped state, and the work device operating means cannot be set to the activated state. As a result, an inappropriate state in which one of the marker operating means and the work device operating means is in an operating state and the other is in a stopped state does not occur.

[I] -4
In contrast to the preceding item [I] -1, as described in the preceding item [I] -2, for example, as shown in FIG. 7, when entering the next turning operation step LB2 from the turning operation step LB1, the turning operation step LB2 starts. When entering the next round work process LB3, when entering the next round work process LB4 from the round work process LB3, there is a case of turning 90 degrees and moving backward, and turning when entering the work process L01 from the empty work process LA1. The turn is different from LL1 and the turns LL2 to LL5 when entering the next work process L02 from the work process L01.
When entering the next round work process LB1 to LB4 from the round work process KB1 to LB4, the right or left marker 19 is not operated to the action posture, and the right and left marker 19 is operated to the retracted position.

As a result, it is not appropriate for the working device to be automatically operated to the working state when entering the next turning work step from the turning work step, and the storage device is operated in the retracted posture as the working device is raised. It is not appropriate that the marker on the opposite side of the right or left marker is automatically operated to the working posture.
In other words, it is not appropriate to set the marker operating means to the operating state and set the working device operating means to the stopped state, and similarly set the marker operating means to the stopped state and operate the working device operating means. It is not appropriate to set the state.

According to the first feature of the present invention, it is possible to set a stop state in which both the marker operating means and the work device operating means are stopped by a single human operation tool.
According to the second feature of the present invention, when the marker operating means is set to the stopped state by the first human operating tool, the second human operating tool is operated in conjunction with this, and the work device operating means is set to the stopped state. The When the working device operating means is set to the stopped state by the second artificial operating tool, the first artificial operating tool is operated in conjunction with this, and the marker operating means is set to the stopped state.

  Therefore, according to the first and second features of the present invention, the driver operates the human operating tool (first human operating tool) (second human operating tool) when entering the next rotating work process from the rotating work process. By doing so, it is possible to set a stop state in which both the marker operation means and the work device operation means are stopped, and by operating one artificial operation tool, the marker operation means is set to the stop state, and then another Therefore, it is not necessary to set the work device operating means to the stop state by operating the artificial operation tool.

  According to the first and second features of the present invention, by operating the human operation tool (first and second human operation tool), the marker operation means is set to the operating state and the work device operation means is set to the stop state. The marker operating means cannot be set to the stopped state, and the work device operating means cannot be set to the activated state. As a result, an inappropriate state in which one of the marker operating means and the work device operating means is in an operating state and the other is in a stopped state does not occur.

(The invention's effect)
According to the first and second features of the present invention, when provided with a marker operating hand Dan及 beauty working device operation manual stage, so that it can set a marker operating unit and the working device operation means to operate properly and stopped As a result, the operability of the paddy field work vehicle was improved.

[II]
The third feature of the present invention resides in the following configuration in the paddy field work vehicle of the first or second feature.
An operation lever is provided for operating the right and left markers in a retracted posture and a working posture, and is manually operated.

[III]
According to a fourth aspect of the present invention, any one of the paddy field work vehicles according to the first to third aspects of the present invention is configured as follows.
It has a right side clutch that transmits power to the right rear wheel and a left side clutch that transmits power to the left rear wheel, and the side clutch on the turning center side is disengaged as the aircraft starts turning Configured to be operated on,
When the vehicle body travels a predetermined distance after the side clutch on the turning center side operated in the disconnected state is operated in the transmission state, the vehicle body is configured to finish turning.

It is a whole side view of a riding type rice transplanter. It is a top view which shows the steering operation system of the right and left front wheels, the transmission system to the right and left front wheels, and the right and left rear wheels. Airframe position detection means, turning start position detection means, turning end position detection means, marker operation means, work device operation means, turning direction detection means, storage means, automatic elevation control means, setting switch control system provided in the control device FIG. It is a figure which shows the flow of the first half of the control of turning at the shore. It is a figure which shows the flow of the second half of the control of turning at the shore. It is a top view which shows the operation | work form (an empty work process and a work process) of the riding type rice transplanter in a paddy field. It is a top view which shows the operation | work form (turning work process) of the riding type rice transplanter in a paddy field. It is a top view which shows the state of turning at the heel. (A) is a top view which shows the state which detects the steering angle from the straight drive position of a wheel base, a front wheel, the turning center of an airframe, and the turning radius of an airframe. (B) is a top view which shows the state which detects the position of the body in the advancing direction of the body of a work process by the turning radius and movement angle of a body. In a first alternative embodiment for carrying out the invention, a machine body position detecting means, a turning start position detecting means, a turning end position detecting means, a marker operating means, a work device operating means, a turning direction detecting means, and a memory provided in the control device. It is a figure which shows the control system of a means, an automatic raising / lowering control means, and a setting switch.

[1]
As shown in FIG. 1, a link mechanism 3 is supported by a rear part of a machine body supported by right and left front wheels 1 and right and left rear wheels 2 so that the link mechanism 3 can be moved up and down. And a seedling planting device 5 (corresponding to a working device) is supported at the rear of the link mechanism 3 to constitute a riding type rice transplanter as an example of a paddy field work vehicle. A paddy field generally has a mud or water layer formed on the lower hard cultivator G1, and the uppermost surface of the mud or water layer is a field surface G2, and the right and left front wheels 1, the right and left rear The wheel 2 travels in contact with the tiller G1.

  As shown in FIG. 1, the seedling planting device 5 includes three planting transmission cases 6, a rotary case 7 supported on the left and right of the rear portion of the planting transmission case 6, and rotatably supported at both ends of the rotary case 7. A pair of planting arms 8, a plurality of floats 9, a seedling platform 10, and the like are provided and configured in a six-row planting type. A hopper 14 for storing powdered fertilizer and three feed units 15 (corresponding to a working device) are provided on the rear side of the driver seat 13, and a blower 16 is provided below the driver seat 13. It has been. The float 9 is provided with a groove forming device 17, and a hose 18 is connected across the feeding portion 15 and the groove forming device 17.

  As shown in FIGS. 1 and 3, right and left markers 19 are provided on the right and left side portions of the seedling planting device 5, and are in contact with the surface G <b> 2 to form an indicator (see FIG. 1). , And a retracted posture (see FIG. 3) that is spaced upward from the surface G2, so that it can be operated freely. The right and left markers 19 include an arm portion 19a supported by the seedling planting device 5 so as to be swingable up and down, and a rotating body 19b supported at the tip of the arm portion 19a so as to freely rotate. The electric motor 21 is provided to operate the right and left markers 19 to the working posture and the retracted posture, and the electric motor 21 is operated by the control device 23.

[2]
Next, the transmission system to the right and left front wheels 1 will be described.
As shown in FIG. 2, the power of the engine 31 is transmitted to the hydrostatic continuously variable transmission 33 and the transmission case 34 via the transmission belt 32, and the front wheel differential is transmitted from the auxiliary transmission (not shown) of the transmission case 34. It is transmitted to the right and left front wheels 1 via a mechanism (not shown) and a transmission shaft (not shown) of the front axle case 35. The hydrostatic continuously variable transmission 33 is configured to be continuously variable from the neutral position to the forward side and the reverse side. As shown in FIG. 1, a shift lever 45 provided on the left side of the steering handle 20 is provided. To operate the hydrostatic continuously variable transmission 33.

  As shown in FIG. 2, a steering member 41 having a trapezoidal shape in plan view is swingably supported around the vertical axis P <b> 2 at the bottom of the mission case 34, and the steering member 41 is swung by the steering handle 20. The tie rod 42 is connected across the steering member 41 and the right and left front wheels 1. Accordingly, by operating the steering handle 20, the right and left front wheels 1 (steering member 41) can be steered from the straight travel position A1 over the right and left steering limits A3.

As shown in FIGS. 1 and 2, reinforcing right and left frames 49 are connected across the rear portion of the mission case 34 and the body frame 66. A potentiometer 47 is fixed to the left frame 49 on the inner side of the machine body, and a linkage rod 48 is connected across the steering member 41 and the detection arm 47a of the potentiometer 47.

  As shown in FIGS. 2 and 3, the position of the steering member 41 is detected by the potentiometer 47, and the detected value of the potentiometer 47 is input to the control device 23, and the right and left front wheels are detected by the detected value of the potentiometer 47. 1 (steering member 41) is detected a steering angle A from a straight traveling position A1.

[3]
Next, the transmission system to the right and left rear wheels 2 will be described.
As shown in FIG. 2, the power of the auxiliary transmission of the transmission case 34 is the transmission shaft 36, the input shaft 38 of the rear axle case 37, the bevel gear 38a fixed to the input shaft 38, the bevel gear 39a meshing with the bevel gear 38a, and the bevel gear 39a. Is transmitted to the right and left rear wheels 2 via a fixed transmission shaft 39, right and left side clutches 40, and right and left axles 65.

  As shown in FIG. 2, the right and left side clutches 40 are configured in a frictional multi-plate type and are urged to a transmission state. The right and left operation shafts 43 for operating the right and left side clutches 40 in the disengaged state are supported downward by the rear axle case 37, and the right and left operation shafts 43 extend between the steering member 41 and the right and left operation shafts 43. The left operating rod 44 is connected. The right and left operation rods 44 are provided with long holes 44 a as interchangeable portions at the connection portions with the right and left operation shafts 43.

  As shown in FIG. 2, when the right and left front wheels 1 (steering member 41) are steered within the range of the straight travel position A1 and the right and left set angles A2, the right and left operation rods 44 The right and left side clutches 40 are operated in the transmission state by the interchange of the long holes 44a. As a result, the aircraft moves forward (reverse) in a state where power is transmitted to the right and left front wheels 1 and the right and left rear wheels 2 (the transmission state of the right and left side clutches 40).

  As shown in FIG. 2, when the right and left front wheels 1 (steering member 41) are steered to the right steering limit A3 side beyond the right set angle A2, the length of the right operating rod 44 is increased. The right operating rod 44 is pulled beyond the range of the hole 44 a, and the right side clutch 40 is operated to be disconnected by the right operating shaft 43. Thus, power is transmitted to the right and left front wheels 1 and the left rear wheel 2 (turning outside) (the transmission state of the left side clutch 40), and the right rear wheel 2 (turning center side) (the right side clutch). The airframe turns to the right in a state of free rotation (40 interruption state).

  As shown in FIG. 2, when the right and left front wheels 1 (steering member 41) are steered to the left steering limit A3 side beyond the left set angle A2, the length of the left operating rod 44 is increased. The left operating rod 44 is pulled beyond the range of the hole 44a, and the left side clutch 40 is operated to the disconnected state by the left operating shaft 43. Accordingly, power is transmitted to the right and left front wheels 1 and the right rear wheel 2 (turning outside) (the transmission state of the right side clutch 40), and the left rear wheel 2 (turning center side) (left side clutch). The airframe turns to the left in a state of free rotation (40 interruption state).

As shown in FIGS. 2 and 3, the right and left provided on the rotational speed sensor 5 0 the rear axle case 37, right and the speed sensor 50 on the left of the transmission downstream side of the right and left side clutch 40 The rotation speed is detected, and detection values of the right and left rotation speed sensors 50 are input to the control device 23. Accordingly, the rotation speeds of the right and left rear wheels 2 are detected by the right and left rotation speed sensors 50 regardless of the transmission state and the disconnected state of the right and left side clutches 40.

[4]
Next, the transmission system to the seedling planting device 5 and the feeding unit 15 will be described.
As shown in FIGS. 1 and 3, the power branched from between the hydrostatic continuously variable transmission 33 and the auxiliary transmission is transmitted to the seedling planting device 5 through the planting clutch 26 and the PTO shaft 25. The The power branched from between the hydrostatic continuously variable transmission 33 and the auxiliary transmission is transmitted to the feeding portion 15 via the fertilizer clutch 27 and the drive rod 30, and is transmitted through the planting and fertilizer clutches 26, 27. And the electric motor 28 operated to the interruption | blocking state is provided.

  As shown in FIGS. 1 and 3, when the planting clutch 26 is operated in the transmission state, the rotary case 7 is turned in the direction shown in FIG. It is rotated in the clockwise direction, and the planting arms 8 alternately take out the seedlings from the lower part of the seedling platform 10 and plant them on the rice field G2. When the planting clutch 26 is operated in the disconnected state, the reciprocating lateral feed drive of the seedling platform 10 and the rotational drive of the rotary case 7 are stopped.

  As shown in FIGS. 1 and 3, when the fertilizer clutch 27 is operated in the transmission state, the fertilizer is fed from the hopper 14 by a predetermined amount by the feeding portion 15, and the fertilizer is made through the hose 18 by the blower 16. The fertilizer is supplied to the rice field G2 through the groove generator 17. When the fertilizer application clutch 27 is operated in the disconnected state, the feeding unit 15 stops and the supply of fertilizer to the surface G2 stops.

[5]
Next, the automatic raising / lowering control means 61 of the seedling planting apparatus 5 will be described.
As shown in FIG. 3, an automatic lift control means 61 is provided in the control device 23. A potentiometer 22 for detecting the height of the central float 9 with respect to the seedling planting device 5 is provided, with the rear portion of the central float 9 supported so as to be swingable up and down around the horizontal axis P1 of the seedling planting device 5. The detection value of the potentiometer 22 is input to the control device 23. As the aircraft moves, the center float 9 follows the ground surface G2 by detecting the height of the center float 9 with respect to the seedling planting device 5 based on the detection value of the potentiometer 22, and the surface G2 (center The height from the float 9) to the seedling planting device 5 can be detected.

  As shown in FIG. 3, the hydraulic cylinder 4 is provided with a control valve 24 for supplying and discharging hydraulic oil, and the control valve 24 is operated by the control device 23. When hydraulic oil is supplied to the hydraulic cylinder 4 by the control valve 24, the hydraulic cylinder 4 is contracted to raise the seedling planting device 5, and when hydraulic oil is discharged from the hydraulic cylinder 4 by the control valve 24, the hydraulic pressure is increased. The cylinder 4 is extended and the seedling planting device 5 is lowered.

  As shown in FIG. 3, based on the height of the center float 9 with respect to the seedling planting device 5 (height from the field G2 (center float 9) to the seedling planting device 5), the seedling planting device 5 The control valve 24 is operated so as to maintain the set height from the surface G2 (so that the detected value of the potentiometer 22 (the vertical distance between the potentiometer 22 and the central float 9) is maintained at the set value). The cylinder 4 expands and contracts, and the seedling planting device 5 automatically moves up and down (the operation state of the automatic lift control means 61).

[6]
Next, the lifting lever 11 will be described.
As shown in FIGS. 1 and 3, an elevating lever 11 is provided on the right side of the driver's seat 13, and the elevating lever 11 can be operated and held in an automatic position, a raised position, a neutral position, a lowered position, and a planting position. The operation position of the elevating lever 11 is input to the control device 23. A potentiometer 29 for detecting the vertical angle of the link mechanism 3 relative to the airframe is provided, and the detection value of the potentiometer 29 is input to the control device 23, and the seedling for the airframe is detected by detecting the vertical angle of the link mechanism 3 relative to the airframe. The height of the planting device 5 can be detected.

  As shown in FIG. 3, control is performed as described below in a state where the elevating lever 11 is operated to the raised position, neutral position, lowered position, and planting position (the elevating lever 11 is not operated to the automatic position). The control valve 24 and the electric motors 21 and 28 are operated by the device 23, and the hydraulic cylinder 4, the planting and fertilizing clutches 26 and 27, and the right and left markers 19 are operated. In this case, the functions of the raised position U and the lowered position D of the operation lever 12 described in [7] to be described later are not activated, and only the functions of the right and left marker positions R and L of the operation lever 12 are activated.

  As shown in FIG. 3, when the elevating lever 11 is operated to the raised position, the automatic elevating control means 61 is stopped, the planting and fertilizing clutches 26 and 27 are operated in the disconnected state, and the right and left markers 19 are retracted. The hydraulic cylinder 4 is contracted and the seedling planting device 5 is raised. When the potentiometer 29 detects that the seedling planting device 5 has reached the upper limit position in a state where the elevating lever 11 is operated to the raised position, the hydraulic cylinder 4 automatically stops.

  As shown in FIG. 3, when the elevating lever 11 is operated to the lowered position, the automatic elevating control means 61 is stopped, the planting and fertilizing clutches 26 and 27 are operated in the disconnected state, and the right and left markers 19 are retracted. In a state where the hydraulic cylinder 4 is operated, the hydraulic cylinder 4 extends and the seedling planting device 5 is lowered. When the central float 9 comes into contact with the rice field G2, the automatic lifting / lowering control means 61 is activated, and the seedling planting device 5 comes into contact with the rice field G2 and stops (the seedling planting device 5 has a set height from the rice field G2). (The state in which the seedling planting device 5 automatically moves up and down so that the detection value of the potentiometer 22 (the vertical distance between the potentiometer 22 and the central float 9) is maintained at the set value).

As shown in FIG. 3, when the elevating lever 11 is operated to the neutral position, the automatic elevating control means 61 is stopped, the planting and fertilizing clutches 26 and 27 are operated in the disconnected state, and the right and left markers 19 are retracted. The hydraulic cylinder 4 stops in a state where it is operated.
Thus, the seedling planting device 5 can be raised and lowered to an arbitrary height and stopped by operating the elevating lever 11 to the raised position, the neutral position, and the lowered position.
As shown in FIG. 3, when the elevating lever 11 is operated to the planting position, the automatic elevating control means 61 is activated in a state where the right and left markers 19 are operated to the retracted posture, and the planting and fertilizing clutch 26, 27 is operated to the transmission state.

[7]
Next, the operation lever 12 will be described.
As shown in FIGS. 1 and 3, an operation lever 12 is provided on the lower right side below the steering handle 20, and the operation lever 12 extends outward on the right side. The operation lever 12 is configured to be operable in a cross direction from the neutral position N to the upward ascending position U, the downward descending position D, the rear right marker position R, and the front left marker position L, and is biased to the neutral position N. The operation position of the operation lever 12 is input to the control device 23.

  In the state where the elevating lever 11 is operated to the automatic position, the control valve 24 and the electric motors 21 and 28 are operated by the control device 23 based on the operation of the operation lever 12 as described below, and the hydraulic cylinder 4, The attachment and fertilization clutches 26 and 27 and the right and left markers 19 are operated.

  As shown in FIG. 3, when the operating lever 12 is operated to the raised position U (operated to the raised position U and operated to the neutral position N), the planting and fertilizing clutches 26 and 27 are operated to the disconnected state and automatically The raising / lowering control means 61 is stopped, the hydraulic cylinder 4 is contracted to raise the seedling planting device 5, and the right and left markers 19 are operated to the retracted posture as will be described later. When the potentiometer 29 detects that the seedling planting device 5 has reached the upper limit position, the hydraulic cylinder 4 automatically stops.

  As shown in FIG. 3, when the operation lever 12 is operated to the lowered position D (operated to the lowered position D and operated to the neutral position N), the automatic lifting control means 61 stops and the planting and fertilizing clutches 26, 27 are stopped. Is operated in the shut-off state, and the hydraulic cylinder 4 is extended and the seedling planting device 5 is lowered while the right and left markers 19 are operated in the retracted posture. When the central float 9 comes into contact with the rice field G2, the automatic lifting control means 61 is activated, and the seedling planting device 5 comes into contact with the rice field G2 and stops (the seedling planting device 5 is set at a set height from the rice field G2. So that the seedling planting device 5 automatically moves up and down (so that the detection value of the potentiometer 22 (the vertical distance between the potentiometer 22 and the center float 9) is maintained at the set value). .

  As described above, after operating the operating lever 12 to the lowered position D (operating to the lowered position D and operating to the neutral position N), operating the operating lever 12 to the lowered position D again (to the lowered position D again). When operated to the neutral position N), the planting and fertilization clutches 26 and 27 are operated in the transmission state with the automatic lifting control means 61 activated.

As shown in FIG. 3, the following operation is performed in a state where the height of the seedling planting device 5 detected by the potentiometer 29 is lower than a predetermined height set in advance.
In a state where the right (left) marker 19 is operated to the retracted position, if the operation lever 12 is operated to the right marker position R (left marker position L) for a first set time (relatively short time) or more, the right The (left) marker 19 is operated to the acting posture.
In a state where the right (left) marker 19 is operated to the acting posture, the operation lever 12 is moved to the right marker position R (left marker position L) for a second set time (a time longer than the first set time) or more. When operated, the right (left) marker 19 is operated to the retracted posture.

  As shown in FIG. 3, when the seedling planting device 5 is raised and the height of the seedling planting device 5 detected by the potentiometer 29 is higher than a predetermined height set in advance, The left marker 19 is operated to the retracted posture. In a state where the height of the seedling planting device 5 detected by the potentiometer 29 is higher than a predetermined height set in advance, even if the operation lever 12 is operated to the right and left marker positions R and L as described above. Regardless of this, the right and left markers 19 are maintained in the retracted posture.

[8]
Next, the working mode of the riding type rice transplanter will be described.
For example, as shown in FIG. 6 and FIG. 7, a riding rice transplanter may adopt the following working mode in a square paddy field in plan view.

  For example, the aircraft is first positioned at a position K1 shown in FIG. 6, the seedling planting device 5 is lowered to the surface G2, and the left marker 19 is operated to the action posture (the right marker 19 is the retracted posture). In this state, the planting and fertilizing clutches 26 and 27 are operated in the disconnected state and travel along the ridge B, and the left marker 19 forms an index of the next work process L01 on the paddy field (empty work process LA1). . In the idling work process LA1, the planting and fertilizing clutches 26 and 27 are not operated in the transmission state, but the seedling planting device 5 is moved down to the surface G2 to travel. This is because it is erased by the float 9 of the seedling planting device 5.

  As shown in FIG. 6, when the aircraft reaches the shore from the empty work process LA1, the seedling planting device 5 is lifted from the field surface G2, and the turn LL1 (left direction) is performed, and the seedling planting device 5 is moved to the field surface G2. The planting and fertilizing clutches 26 and 27 are operated to the transmission state to enter the work process L01. In the work process L01, the left marker 19 is operated to the retracted position, the right marker 19 is operated to the operating position, and the aircraft is caused to travel along the index formed on the surface G2 in the empty work process LA1. While planting seedlings and supplying fertilizer to the field surface G2, the index of the next work process L02 is formed on the field surface G2 by the right marker 19.

  As shown in FIG. 6, when the aircraft reaches the heel from the work process L01, the planting and fertilization clutches 26 and 27 are operated in the disconnected state, the seedling planting device 5 is raised from the surface G2, and the turn LL2 (right Direction), the seedling planting device 5 is lowered to the field surface G2, the planting and fertilization clutches 26, 27 are operated in the transmission state, and the operation process L02 is entered. In the work process L02, the right marker 19 is operated to the retracted position, the left marker 19 is operated to the action position, and the aircraft is driven along the index formed on the field G2 in the work process L01. The marker of the next work process L03 is formed on the rice field G2 by the left marker 19 while planting and supplying fertilizer to the rice field G2.

  As shown in FIG. 6 and FIG. 7, a plurality of work strokes L01, L02, L03, L04, L05 and turns LL1 (left direction), LL2 (right direction), LL3 (left direction), LL4 (right direction), When LL5 (left direction) is performed, a portion where planting of seedlings and supply of fertilizer is not performed along the ridge B is formed. In this state, when the aircraft reaches the heel from the work process L05, the planting and fertilization clutches 26 and 27 are operated to be disconnected, the seedling planting device 5 is lifted from the surface G2, and the turn LL6 (right direction). To position the aircraft at the position indicated by K2.

  At the position indicated by K2, the seedling planting device 5 is lowered to the field surface G2, and the planting and fertilizing clutches 26 and 27 are operated in the transmission state to enter the rotating work process LB1. In the turning work process LB1, there is a cocoon B on the left side of the machine, and there are seedlings planted in the work process L05 on the right side of the machine, so the right and left markers 19 are operated to the retracted posture.

  As shown in FIG. 7, when the machine body reaches the heel from the turning work process LB1, the planting and fertilization clutches 26 and 27 are operated in a disconnected state, and the seedling planting device 5 is raised from the rice field G2 to 90 degrees. By turning and moving backward, the body is positioned at position K3, the seedling planting device 5 is lowered to the field surface G2, and the planting and fertilization clutches 26 and 27 are operated in the transmission state to perform the next turning operation. Enter the process LB2. In the turning work process LB2, as in the turning work process LB1, the right and left markers 19 are operated to the retracted posture.

  Thereafter, as shown in FIG. 7, the two round work steps LB3, LB4 (the seedling planting device 5 is lowered to the field surface G2, and the planting and fertilizing clutches 26, 27 are operated to the transmission state. , The right and left markers 19 are operated to the retracted posture). The turning work process LB3 travels in the reverse direction in the empty work process LA1 shown in FIG. 6, and when the turning work process LB4 is completed, the aircraft reaches the position where the turn LL6 (right direction) is performed. Thereafter, the aircraft is taken out from the exit of the paddy field near the position where the turn LL6 (right direction) is performed.

  As described above, for example, in a square paddy field in plan view as shown in FIGS. 6 and 7, one empty work process LA1, a plurality of work processes L01 to L05, and four rotating work processes LB1 to LB4 are performed. By doing, seedlings can be planted in all parts of the paddy field and fertilizer can be supplied to the rice field G2.

[9]
Next, the marker operation means 54 and the work device operation means 55 will be described by turning.
The working device operation unit 55, as described in later-described [16], based on the detection of the turning end position detecting means 53, Ru der those operating the planting and fertilization clutch 26, 27 to the transmission state.

  As described in [13] and [16], which will be described later, the marker operating means 54 operates the right or left marker 19 in the action posture to the retracted posture as the seedling planting device 5 rises from the surface G2. When turning at the heel, the right or left marker 19 on the side opposite to the turning direction of the machine body is operated to the acting posture as the seedling planting device 5 is lowered to the surface G2. .

  In other words, the marker operation means 54 described above, for example, when the aircraft reaches the heel in a state where the right marker 19 is operated to the action posture (the left marker 19 is the retracted posture), as shown in the work process L01 of FIG. As the seedling planting device 5 rises from the surface G2, the right marker 19 is operated to the retracted posture, and the turn LL2 (right direction) is performed to enter the next work process L02. The left marker 19 on the opposite side to the (right direction) is operated to the acting posture.

  For example, the marker operating means 54 is provided with the marker 19 on the right side of the acting posture as the seedling planting device 5 is lifted from the surface G2 in the work strokes L01 and L02 and the turn LL2 (right direction) shown in FIG. When the seedling planting device 5 is lowered to the field surface G2, the side opposite to the right marker 19 operated to the retracted posture as the seedling planting device 5 is lifted from the field surface G2. The left marker 19 is operated to the acting posture.

  As a result, the right or left marker 19 on the side opposite to the turning direction of the machine body is operated to the operating posture, and the seedling planting device 5 (working device) is operated to the retracted posture as it rises from the surface G2. Manipulating the marker 19 on the opposite side of the right or left marker 19 to the acting posture is synonymous.

[10]
Next, in any state with respect to the empty work process LA1, the work processes L01 to L05, and the rotating work processes LB1 to LB4 shown in the previous item [8], FIGS. 6 and 7, the marker operation unit 54 and the work device operation unit 55 are used. A description will be given of whether or not should be in an operating state.

  As shown in FIG. 3, a single setting switch 46 (corresponding to an artificial operation tool) that can be operated artificially is provided in the vicinity of the steering handle 20, and the setting switch 46 is configured to be operated to an operation position and a stop position. The operation position of the setting switch 46 is input to the control device 23. When the setting switch 46 is operated to the operating position, an operating state in which both the marker operating means 54 and the work device operating means 55 are set is set. When the setting switch 46 is operated to the stop position, the marker operating means 54 and the work are operated. A stop state is set in which both of the device operating means 55 stop. Therefore, the setting switch 46 cannot set a state in which the marker operating unit 54 is in the activated state and the work device operating unit 55 is in the stopped state. Similarly, the setting switch 46 cannot set a state in which the marker operating unit 54 is in a stopped state and the work device operating unit 55 is in an operating state.

  As described in the preceding item [8] and as shown in FIG. 6, when entering the work process L01 from the idle work process LA1, the turn LL1 (left direction) is a general (standard) turn that makes a substantially U-turn, The right marker 19 opposite to the left marker 19 operated to the retracted posture in the turn LL1 (left direction) is operated to the acting posture in the work stroke L01 (the left marker 19 is acted in the empty working stroke LA1). On the other hand, in the work process L01, the right marker 19 is operated to the action posture).

  As described in the preceding paragraph [8] and as shown in FIG. 6, when entering the next work process L02 from the work process L01, when entering the next work process L03 from the work process L02, the work process L03 is changed to the next work process L04. When entering, when entering the next work process L05 from the work process L04, the turn LL2 (right direction), LL3 (left direction), LL4 (right direction), LL5 (left direction) is generally a U-turn. It is a (typical) turn.

  As described in the preceding paragraph [8] and as shown in FIG. 6, when entering the next work process L02 from the work process L01, when entering the next work process L03 from the work process L02, the work process L03 is changed to the next work process L04. When entering, when entering the next work process L05 from the work process L04, the marker 19 operated to the retracted position in the turns LL2 (right direction), LL3 (left direction), LL4 (right direction), and LL5 (left direction) Operates the marker 19 on the opposite side to the acting posture in the next work steps L01 to L05.

As described in the preceding item [8] and as shown in FIG. 6, the right marker 19 is operated to the working posture in the work process L01, whereas the left marker 19 is operated to the working posture in the work process L02. In the work process L02, the left marker 19 is operated to the action posture, whereas in the work process L03, the right marker 19 is operated to the action position.
In the work process L03, the right marker 19 is operated to the action posture, whereas in the work process L04, the left marker 19 is operated to the action position. In the work process L04, the left marker 19 is operated to the action posture, whereas in the work process L05, the right marker 19 is operated to the action position (however, as shown in FIGS. 6 and 7, the work process L05 is performed. Then, since the next rotation work process LB1 is entered, the right and left markers 19 may be operated to the retracted posture).

  Accordingly, it is appropriate to set the operating state in which the marker operating means 54 operates when entering the work process L01 from the idle work process LA1 and when entering the next work process L01 to L05 from the work process L01 to L05. Therefore, it is appropriate to set the operating state in which the work device operating means 55 operates. Therefore, the driver may set the operating state in which both the marker operating means 54 and the work device operating means 55 are operated by operating the setting switch 46 to the operating position.

[11]
Next, in any state with respect to the empty work process LA1, the work processes L01 to L05, and the rotating work processes LB1 to LB4 shown in the previous item [8], FIGS. 6 and 7, the marker operation unit 54 and the work device operation unit 55 are used. Will be described below.

As described in the preceding item [8] and as shown in FIGS. 6 and 7, when entering the next turning work process LB2 from the turning work process LB1, entering the next turning work process LB3 from the turning work process LB2 When entering the next turning work process LB4 from LB3, there is a case of turning 90 degrees and moving backward, turning LL1 (left direction) when entering the work process L01 from the empty work process LA1, and work processes L01 to L05. The turn LL2 (right direction), LL3 (left direction), LL4 (right direction), and LL5 (left direction) when entering the next work process L01 to L05 is different.
When entering the next round work process LB1 to LB4 from the round work process KB1 to LB4, the right or left marker 19 is not operated to the action posture, and the right and left marker 19 is operated to the retracted position.

  Accordingly, when entering the next round work process LB1 to LB4 from the round work process LB1 to LB4, it is not appropriate to set an operation state in which the marker operation means 54 is activated, and an operation state in which the work device operation means 55 is activated. It is not appropriate to set Therefore, the driver may set the stop state in which both the marker operation means 54 and the work device operation means 55 are stopped by operating the setting switch 46 to the stop position.

As shown in the description in [8] above and FIGS. 6 and 7, when turning around the work stroke L05 and entering the work stroke LB1, a general (typical) turn where the turn LL6 (right direction) makes a substantially U-turn. It is. However, in the rotation work process LB1, the right and left markers 19 are operated to the retracted posture.
Accordingly, when the driver turns from the work stroke L05 and enters the work stroke LB1, the driver operates the setting switch 46 to the stop position to set a stop state in which both the marker operation means 54 and the work device operation means 55 are stopped. Good.

[12]
Next, an operating state in which both the marker operating means 54 and the work device operating means 55 described in the previous items [9] [10] [11] are operated will be described.
As shown in FIG. 3, the control device 23 includes a body position detection means 51, a turning start position detection means 52, a turning end position detection means 53, a marker operation means 54, a work device operation means 55, a turning direction detection means 56, and a memory. Means 57 are provided. A display lamp 64 is provided in the vicinity of the steering handle 20 and a buzzer 67 is provided.

  In the state where the elevating lever 11 is operated to the automatic position and the setting switch 46 is operated to the operating position, the machine body position detecting means 51, the turning start position detecting means 52, the turning end position detecting means 53, the marker operating means 54, the work The device operation means 55, the turning direction detection means 56, the storage means 57, the display lamp 64, and the buzzer 67 operate as described in [13] to [16] below.

  As shown in FIG. 3, the airframe position detection means 51 includes the airframe position Y1 in the advancing direction (+ Y) (−Y) of the airframe in the idle work process LA1 and the work processes L01 to L05 (the advancing direction of the airframe before the start of turning). (In other words, the coordinates of the aircraft in the direction of travel of the aircraft before the start of turning are detected). As described in [13] to [16] below, the position Y1 of the body in the advancing direction (+ Y) (−Y) of the body in the empty work process LA1 and work processes L01 to L05 is performed by the machine position detection unit 51. Is detected.

  In a riding type rice transplanter equipped with a six-row type seedling planting device 5, turning LL1 (left direction), LL2 (right direction), LL3 (left direction), LL4 (right direction), as shown in FIG. As shown in FIG. 8, LL5 (left direction) is composed of a first half turning stroke L1 and a second half turning stroke L2. The first half turning stroke L1 and the second half turning stroke L2 will be described in the following [13] to [16], with the turning LL2 (right direction) performed between the work strokes L01 and L02 as a representative.

[13]
Next, the turning stroke L1 in the first half will be described with reference to FIGS.
When the setting switch 46 is operated to the operating position (step S1), the display lamp 64 is turned on (step S2), and when the setting switch 46 is operated to the stop position (step S1), the display lamp 64 is turned off (step S3). When the aircraft is positioned at the position K1 shown in FIG. 6 and the seedling planting device 5 is lowered to the field surface G2 to start the empty work process LA1, the driver operates the operation lever 12 as described in [7] above. The left marker 19 is manipulated to the action posture.

In the work process L01, the elevating lever 11 is operated to the automatic position, and the setting switch 46 is operated to the operating position (step S1). The state where the seedling planting device 5 is lowered to the surface G2 (corresponding to the working state of the working device), the operating state of the automatic lifting control means 61, the transmission state of the planting and fertilizing clutches 26, 27 (corresponding to the working state of the working device) ), The transmission state of the right and left side clutches 40, the right marker 19 is in the operating position, the left marker 19 is operated in the retracted position, and the display lamp 64 is lit ( Step S2).
As shown in FIG. 6, “turning direction of the airframe (leftward direction)” is stored in the storage means 57 by performing the turning LL1 (leftward direction) between the empty work stroke LA1 and the work stroke L01. (Step S13).

  When the aircraft reaches the heel in the above-described state, the driver operates the operation lever 12 to the raised position U (operated to the raised position U and to the neutral position N) (step S4). When the operating lever 12 is operated to the raised position U (operated to the raised position U and operated to the neutral position N) (step S4), the buzzer 67 is intermittently operated (step S5), and the planting and fertilizing clutch 26, 27 is operated to the shut-off state (step S6) (corresponding to the non-working state of the working device), the automatic lifting control means 61 stops (step S7).

  The hydraulic cylinder 4 is contracted to raise the seedling planting device 5 from the surface G2 (step S8) (corresponding to the non-working state of the working device), and the marker operating means 54 operates the right marker 19 to the retracted position. (Step S9) (corresponding to a state in which the marker 19 on the right or left of the acting posture is operated to the retracted posture as the working device 5 rises from the surface G2). When the potentiometer 29 detects that the seedling planting device 5 has reached the upper limit position, the hydraulic cylinder 4 automatically stops.

[14]
Next, following the previous item [13], the first half of the turning stroke L1 will be described with reference to FIGS.
When an operation signal due to the operation lever 12 being moved to the raised position U is input to the control device 23 (corresponding to the start of turning from the work stroke L01), the turning start position detecting means 52 causes the work strokes L01 and L02 to be detected. The position Y1 of the body in the traveling direction (+ Y) (−Y) of the body is set to “0 (origin)”, and “0 (origin)” is detected (set) as the turning start position E1 (step S101). At the same time, “0 (origin)” is detected (set) as the turning end position E3 (step S102).

  When the driver operates the operating lever 12 to the raised position U, the steering handle 20 is operated almost simultaneously, the right and left front wheels 1 (steering members 41) are steered in the turning direction, and the first half turning stroke L1. to go into. When the right and left front wheels 1 (steering member 41) are steered to the right (left) steering limit A3 side beyond the right (left) set angle A2 (step S10), the previous item [2] In the state where the side clutch 40 on the outer side of the turn is operated in the transmission state, the side clutch 40 on the turn center side is operated in the disengaged state (step S11).

When the turning start position E1 is detected (set) in step S101, the machine body position detection means 51 performs the machine body in the traveling direction (+ Y) (−Y) of the machine in the work strokes L01 and L02 based on the following equation 1. Detection of the position Y1 is started (step S103).
Formula 1: Y1 = R * SIN (θ)
R: turning radius of the aircraft θ: angle of movement of the aircraft from the turning start position E1

  As shown in FIG. 9A, when the steering angle A from the straight position A1 of the right and left front wheels 1 (steering member 41) is determined, the turning center C of the fuselage is the right and left rear wheels 2 It is determined that the vehicle is positioned on an extension line of the axle 65 (see FIG. 2), and the wheel bases W (the axles of the right and left front wheels 1 and the axles 65 of the right and left rear wheels 2 (see FIG. 2) 2) and the steering angle A from the straight position A1 of the right and left front wheels 1 (steering member 41) is detected. When the turning center C of the airframe is detected, the distance between the left and right center of the airframe and the turning center C of the airframe is detected as the turning radius R of the airframe.

As shown in FIGS. 9A and 9B, in the state where the turning center C and the turning radius R of the airframe are detected, the pulse of the rotation speed sensor 50 on the turning center side (the rotation speed of the rear wheel 2 on the turning center side). ) To detect the travel distance G of the aircraft (corresponding to the arc portion with respect to the turning radius R of the aircraft), and based on the turning center C of the aircraft and the turning radius R and the traveling distance G of the aircraft, the movement angle θ of the aircraft is Detected. As described above, the position Y1 of the airframe in the forward direction (+ Y) (−Y) of the airframe in the work strokes L01 and L02 is detected based on Equation 1 based on the turning radius R and the movement angle θ of the airframe (step S103). ).
Thus, the position of the aircraft in the traveling direction (+ Y) (−Y) of the aircraft in the work strokes L01 and L02 when the movement angle θ of the aircraft is in the range of 0 degrees (turning start position E1) to 90 degrees (boundary position E2). Y1 is in a state of moving away from the turning start position E1 to (+ Y).

[15]
Next, following the previous item [14], the first half of the turning stroke L1 will be described with reference to FIGS.
When the turning start position E1 is detected (set) in step S101, a pulse (the number of revolutions of the rear wheel 2 outside the turning) from the turning start position E1 is detected (accumulated). Based on the value and the steering angle A from the straight travel position A1 of the right and left front wheels 1 (steering member 41), the turning angle F1 of the airframe is detected (integrated) from "0" (step S104).

  In this case, the angle of the current direction of the aircraft relative to the orientation of the aircraft at the turning start position E1 (work process L01) is determined by the pulse of the rotation speed sensor 50 outside the turning (after the turning outside). The number of rotations of the wheel 2) and the steering angle A from the straight travel position A1 of the right and left front wheels 1 (steering member 41) are detected, and this detected value is detected (integrated) as the turning angle F1 of the fuselage. (Step S104).

  If the turning angle F1 of the airframe is 90 degrees, the direction of the airframe is right side to the direction of the airframe at the turning start position E1 (work process L01), and the turning angle F1 of the airframe is 180 degrees. If so, the direction of the machine body is opposite to the direction of the machine body at the turning start position E1 (work process L01) (work process L02).

  When the pulse of the rotation speed sensor 50 on the outside of the turn (the rotation speed of the rear wheel 2 on the outside of the turn) increases in a state where the right and left front wheels 1 (steering member 41) are steered in the turning direction (integrated). Then, it is detected (integrated) that the turning angle F1 of the airframe has increased by the increment of the pulse of the rotation speed sensor 50 outside the turning (the rotation speed of the rear wheel 2 outside the turning). Conversely, in the state where the right and left front wheels 1 (steering member 41) are steered to the straight travel position A1, the pulse of the rotation speed sensor 50 on the outside of the turn (the rotation speed of the rear wheel 2 on the outside of the turn) increases. However (even if integrated), it is detected (integrated) that the aircraft has just moved straight and that the turning angle F1 of the aircraft has not changed.

[16]
Next, the latter turning process L2 will be described with reference to FIGS.
If the turning angle F1 of the airframe exceeds 90 degrees (boundary position E2), it is determined that the airframe has entered the latter turning stroke L2. Since the direction of the airframe L2 in the second half is opposite to the direction of the airframe in the first half of the turning stroke L1, the position Y1 of the airframe in the moving direction (+ Y) (−Y) of the airframe in the work strokes L01 and L02 is In this state, the vehicle approaches the turning start position E1 (turning end position E3).

  In this case, when the turning angle F1 of the airframe reaches a set turning angle FA1 (for example, 100 degrees to 150 degrees) (step S12), it is determined that the turning at the shore is performed normally, and the potentiometer 47 detects the turning. Based on the value, the turning direction of the airframe is detected by the turning direction detection means 56, and the detected turning direction of the airframe is stored (updated) in the storage means 57 (step S13). In the turning LL2 (right direction), the storage means 57 stores (updates) “the turning direction of the airframe (right direction)”.

  When entering the second half of the second turning stroke L2, the driver operates the steering handle 20 to operate the right and left front wheels 1 (steering member 41) to the straight advance position A1 beyond the right (left) set angle A2. (Step S14). As a result, the side clutch 40 on the turning center side is operated to the transmission state (step S15), and the aircraft enters the straight traveling state. When the aircraft enters a straight-ahead state, the calculation according to Equation 1 is not performed, and the average value (negative value) of the pulses of the right and left rotation speed sensors 50 (the rotation speed of the right and left rear wheels 2) is the work process. It is detected as the position Y1 of the aircraft in the traveling direction (+ Y) (−Y) of the aircraft of L01 and L02.

  When the potentiometer 47 detects that the right and left front wheels 1 (steering member 41) have been operated to the straight advance position A1 beyond the right (left) setting angle A2 (step S14), planting and The seedling planting device 5 is automatically lowered while maintaining the shut-off state of the fertilizer clutches 26 and 27 (step S16).

When the height of the seedling planting device 5 detected by the potentiometer 29 becomes lower than a predetermined height set in advance (see [7] in the previous section) due to the lowering of the seedling planting device 5, the marker operating means 54 Then, the left marker 19 opposite to the “turning direction (right direction) of the aircraft” stored in the storage means 57 is operated to the acting posture (step S17 ).

  When the center float 9 comes into contact with the rice field G2 due to the lowering of the seedling planting device 5, the automatic lifting control means 61 is activated, and the seedling planting device 5 comes into contact with the rice field G2 and stops (step S18). (Seedling planting device 5 is maintained at the set height from the field G2 (so that the detection value of the potentiometer 22 (the vertical distance between the potentiometer 22 and the center float 9) is maintained at the set value)) The state where the planting device 5 automatically moves up and down).

When the turning end position detecting means 53 detects that the position Y1 of the airframe in the advancing direction (+ Y) (−Y) of the airframe in the work strokes L01 and L02 has reached the turning end position E3 (Step S19) the device operating means 55 planting and fertilization clutch 26, 27 Ru is operated to the transmission state (step S20).
Thereby, the buzzer 67 is stopped (step S21), and seedling planting by the seedling planting device 5 (rotating case 7, planting arm 8) and supply of fertilizer to the rice field G2 by the feeding unit 15 are started. Then, the next work process L02 is entered.

[17]
Next, the state where the seedling planting device 5 is raised from the field surface G2 and lowered to the field surface G2 in the middle of the work steps L01 to L05 shown in FIG. 6 will be described.
For example, in the middle of the work process L01 shown in FIG. 6 (the right marker 19 is operated to the acting posture and the left marker 19 is operated to the retracted posture), to the seedling planting device 5 (the seedling table 10). In order to replenish seedlings, it is assumed that the airframe is temporarily stopped, the planting and fertilization clutches 26 and 27 are operated in a disconnected state, and the seedling planting device 5 is raised from the surface G2.

  In this case, the marker operation means 54 operates the right marker 18 to the retracted posture. As shown in FIG. 6, “turning direction of the airframe (leftward direction)” is stored in the storage means 57 by performing the turning LL1 (leftward direction) between the empty work stroke LA1 and the work stroke L01. (Step S13).

  Next, when replenishment of seedlings to the seedling planting device 5 (seedling platform 10) is finished and the seedling planting device 5 is lowered to the surface G2, it is stored in the storage unit 57 by the marker operating unit 54. The right marker 19 on the side opposite to the “turning direction of the airframe (leftward direction)” is operated to the acting posture. As long as “the turning direction of the machine body (leftward direction)” is stored in the storage unit 57, the marker operation unit 54 stores the seedling planting device 5 even if the seedling planting device 5 is lifted from the field surface G2 and lowered to the field surface G2. The right marker 19 on the side opposite to the “turning direction (left direction) of the aircraft” stored in the means 57 is operated to the acting posture.

  Thereby, in order to replenish seedlings to the seedling planting device 5 (seedling table 10), the seedling planting device 5 is raised upward from the field surface G2 and lowered to the field surface G2 during the work process L01 to L05. However, there is no change in the action and retracted posture of the right or left marker 19, and the action and retracted posture of the right and left marker 19 are exchanged with those before ascending from the surface G2 of the seedling planting device 5. A state does not arise.

[First Alternative Embodiment for Implementing the Invention]
Instead of the setting switch 46 of the above-mentioned [DETAILED DESCRIPTION], the following configuration may be used.
As shown in FIG. 10, a first setting switch 68 (corresponding to a first human operation tool) and a second setting switch 69 (corresponding to a second human operation tool) that can be operated artificially are provided in the vicinity of the steering handle 20. The operation positions of the first and second setting switches 68 and 69 are input to the control device 23.

  As shown in FIG. 10, when the first setting switch 68 is operated to the operating position, an operating state in which the marker operating means 54 operates is set, and when the first setting switch 68 is operated to the stop position, the marker operating means 54 stops. The stop state to be set is set. When the second setting switch 69 is operated to the operating position, an operating state in which the work device operating means 55 is operated is set, and when the second setting switch 69 is operated to the stop position, a stop state in which the working device operating means 55 is stopped is set. Is set.

  In this case, when one of the first and second setting switches 68 and 69 is operated from the stop position to the operating position, the other of the first and second setting switches 68 and 69 is operated from the stop position to the operating state in conjunction with this operation. As shown, the first and second setting switches 68 and 69 are linked (if the other of the first and second setting switches 68 and 69 is operated to the operating position, the first and second setting switches The other of 68 and 69 is maintained in the operating position).

  When one of the first and second setting switches 68 and 69 is operated from the operating position to the stop position, the other of the first and second setting switches 68 and 69 is operated from the operating position to the stop position in conjunction with this. The first and second setting switches 68 and 69 are linked to each other (if the other of the first and second setting switches 68 and 69 is operated to the stop position, the first and second setting switches 68 and 69 are connected). Is kept in the stop position).

  The first setting switch 68 may be eliminated, and the function of the first setting switch 68 may be provided in the operation lever 12. In this case, each time the operating lever 12 is operated (held) over the relatively long set time (second set time) at the raised position U or the right and left marker positions R and L, the marker operating means 54 is activated. The operation state to be performed and the stop state to be stopped are configured to be alternately set.

[Second embodiment for carrying out the invention]
In the above-mentioned [Mode for Carrying Out the Invention] [First Alternative Mode for Carrying Out the Invention], the storing means 57 does not store the turning direction of the aircraft, but the marker operating means 54 and the storing means 57 are described below. You may comprise so that it may operate | move like.

  When the right or left marker 19 of the acting posture is operated to the retracted posture as the seedling planting device 5 rises from the surface G2, the right or left marker 19 operated to the retracted posture is stored in the storage means 57. . As the seedling planting device 5 is lowered to the field surface G2, the right or left marker 19 on the opposite side of the right or left marker 19 stored in the storage means 57 is operated to the action posture (of the working device 5). This corresponds to a state in which the marker 19 on the side opposite to the right or left marker 19 which is operated to the retracted posture with the rise from the surface G2 is operated to the acting posture).

[Third Another Mode for Carrying Out the Invention]
In step S103 of FIG. 4 in the above-mentioned [Mode for Carrying Out the Invention] [First Alternative Mode for Carrying Out the Invention] [Second Alternative Mode for Carrying Out the Invention], based on Equation 1, Instead of configuring the body position detection means 51 so as to detect the position Y1 of the body in the traveling direction (+ Y) (−Y) of the body in the work process LA1 and work processes L01 to L05, the body position detection means 51, The turning start position detecting unit 52 and the turning end position detecting unit 53 may be configured as follows.

When an operation signal due to the operation lever 12 being moved to the raised position U is input to the control device 23 (step S4), integration of detection values of the rotation speed sensor 50 on the turning center side is started (turning position detecting means). In addition to this, when the integration of detection values of the rotation speed sensor 50 on the turning center side (corresponding to the turning start position E1) is set as the origin (corresponding to the turning start position detecting means 52), A set value (corresponding to the turning end position E3) is set for the origin.
The turn LL1 (left direction), LL2 (right direction), LL3 (left direction), LL4 (right direction), LL5 (left direction), and turn LL6 (right direction) shown in FIG. The radius and the travel distance of the aircraft are recognized, and the detection value of the rotation speed sensor 50 on the turning center side is recognized as a value representing the position of the aircraft, and the above-described set values are set in advance.

Before the detected value (integrated value) of the rotation speed sensor 50 on the turning center side reaches the set value, the right and left front wheels 1 (steering member 41) go straight beyond the right (left) set angle A2. The side clutch 40 on the turning center side is operated in the transmission state, and the seedling planting device 5 is automatically lowered.
Next, when the detected value (integrated value) of the rotation speed sensor 50 on the turning center side reaches the set value described above, it is determined that the turning end position E3 has been reached (corresponding to the turning end position detecting means 53), and planting is performed. And the fertilization clutches 26 and 27 are operated to a transmission state.

[Fourth embodiment for carrying out the invention]
In the above-mentioned [Mode for Carrying Out the Invention] [First Alternative Mode for Carrying Out the Invention] [Second Alternative Mode for Carrying Out the Invention], the right and left front wheels 1 (steering members 41) Every time the steering angle A from the rectilinear position A1 changes, the turning center C and turning radius R of the airframe, the distance traveled by the airframe G, the detection of the moving angle θ of the airframe, the empty work stroke LA1 and the work stroke L01 according to Equation 1 Instead of detecting the position Y1 of the aircraft in the advancing direction (+ Y) (−Y) of the aircraft of L05, instead of this, the following configuration may be adopted.

In the first half turning stroke L1 (second half turning stroke L2) shown in FIG. 8, there are nine regions (0 ° to 10 ° regions, 10 ° to 20 °) having a range of 10 degrees (corresponding to a predetermined angle range). Degree area, 20 degree to 30 degree area, 30 degree to 40 degree area, 40 degree to 50 degree area, 50 degree to 60 degree area, 60 degree to 70 degree area, 70 degree to 80 degree area The turning radius R of one aircraft (the turning radius R of the aircraft corresponding to the central angle of the region) is set in each of the nine regions.
For example, in the region of 0 to 10 degrees, the turning radius R of the aircraft when the steering angle A from the straight traveling position A1 of the right and left front wheels 1 (steering member 41) is 5 degrees (FIG. 9 (a) ( b) is set as the turning radius R of one aircraft in the range of 0 to 10 degrees.

  When the steering angle A from the rectilinear position A1 of the right and left front wheels 1 (steering member 41) is in the region of 0 degrees to 10 degrees, the rectilinear position A1 of the right and left front wheels 1 (steering member 41) Even if the steering angle A changes, the turning radius R of one aircraft in the range of 0 to 10 degrees is used regardless of this, and the travel distance G of the aircraft, the detection of the movement angle θ of the aircraft, The position Y1 of the airframe in the advancing direction (+ Y) (−Y) of the airframe in the empty work stroke LA1 and work strokes L01 to L05 is detected.

At 10 degrees to 20 degrees, as described above , the turning radius R of one body in the region of 10 degrees to 20 degrees is used to detect the travel distance G of the body and the movement angle θ of the body. The position Y1 of the airframe in the advancing direction (+ Y) (−Y) of the airframe in the empty work stroke LA1 and the work strokes L01 to L05 according to Equation 1 is detected.

[Fifth alternative embodiment for carrying out the invention]
Instead of the above-mentioned [fourth alternative embodiment for carrying out the invention], the following configuration may be adopted.
In the first half turning stroke L1 (second half turning stroke L2) shown in FIG. 8, there are nine regions (0 ° to 10 ° regions, 10 ° to 20 °) having a range of 10 degrees (corresponding to a predetermined angle range). Degree area, 20 degree to 30 degree area, 30 degree to 40 degree area, 40 degree to 50 degree area, 50 degree to 60 degree area, 60 degree to 70 degree area, 70 degree to 80 degree area The turning radius R of one airframe (the turning radius R of the airframe corresponding to the maximum angle of the area) is set in each of the nine areas.
For example, in the region of 0 degrees to 10 degrees, the turning radius R of the aircraft when the steering angle A from the straight traveling position A1 of the right and left front wheels 1 (steering member 41) is 10 degrees (FIG. 9A ( b) is set as the turning radius R of one aircraft in the range of 0 to 10 degrees.

  Even if the steering angle A of the right and left front wheels 1 (steering member 41) from the rectilinear position A1 enters the range of 0 degrees to 10 degrees from 0 degrees (straight travel position A1), the empty work process LA1 and work The position Y1 of the airframe in the traveling direction (+ Y) (−Y) of the airframe in the strokes L01 to L05 is not detected. When the steering angle A from the rectilinear position A1 of the right and left front wheels 1 (steering member 41) reaches 10 degrees, the turning radius R and 10 degrees of one airframe in the range of 0 degrees to 10 degrees gives the formula 1 is used to detect the position Y1 of the airframe in the advancing direction (+ Y) (−Y) of the airframe in the empty work process LA1 and work processes L01 to L05.

In 10 degrees to 20 degrees, ..., using the turning radius R of the fuselage in the region of the same manner as described above 10 degrees to 20 degrees., 20 degrees, at 30 degrees.., 10 degrees to 20 degrees Based on the turning radius of one aircraft in the region of..., The position Y1 of the aircraft in the advancing direction (+ Y) (−Y) of the aircraft in the empty work process LA1 and work processes L01 to L05 based on Equation 1. Detection is performed.

[Sixth Embodiment for Implementing the Invention]
In the above-mentioned [Mode for Carrying Out the Invention] [First Alternative Mode for Carrying Out the Invention] to [Fifth Alternative Mode for Carrying Out the Invention], the following configuration may be adopted.
If the right and left front wheels 1 (steering member 41) are steered beyond the right (left) set angle A2 before the operating lever 12 is moved to the raised position U, the side on the turning center side At the same time when the clutch 40 is operated in the disconnected state, the planting and fertilizing clutches 26 and 27 are automatically operated in the disconnected state, and the seedling planting device 5 is automatically raised from the field surface G2. May be.

  In this case, when the potentiometer 47 detects that the right and left front wheels 1 (steering member 41) have been steered beyond the right (left) set angle A2, the turning position detector 52 starts turning. The turning start position E1 is detected (set), and the machine body position detecting means 51 is configured to start operation.

[Seventh embodiment for carrying out the invention]
In the above-mentioned [Mode for Carrying Out the Invention] [First Alternative Mode for Carrying Out the Invention] to [Sixth Alternative Mode for Carrying Out the Invention], the following configuration may be adopted.
For example, when a working clutch that transmits power to the working device is not provided, such as a working device such as a grooving device, the state in which the working device is raised from the field surface G2 is set to the non-working state, and the working device is lowered to the field surface G2. You may comprise so that it may become a working state.

  With this configuration, the operating lever 12 is operated to the raised position U, or the right and left front wheels 1 (steering member 41) are steered beyond the right (left) set angle A2. Thus, the work device is configured to rise from the field surface G2 (non-working state) and to be lowered to the field surface G2 based on the detection of the turning end position E3 (working state).

  In the present invention, a rotary cultivator (corresponding to a working device) can be connected to a rotary tiller device (corresponding to a working device) at the rear part of the machine body and a cutting part (corresponding to a working device) can be supported to be lifted and lowered at the front part of the machine body. It can also be applied to work vehicles such as combines. It is also possible to configure the body position detection means 51 by GPS. In place of the powdery fertilizer in the hopper 14, the present invention can be applied to a liquid fertilizer or a work vehicle containing powdered or liquid chemicals, seeds, or the like.

1 front wheel
2 Rear wheels 5, 15 Working device
12 Operation lever 19 Marker
40 Side clutch 46 Artificial operation tool
5 4 Marker operating means 55 Working device operating means 68 First human operating tool 69 Second human operating tool
G2 Taba

Claims (4)

The work device provided in the aircraft is configured to be operable in working and non-working states,
It is equipped with right and left markers that can be operated in an action posture for grounding to the surface and forming an index of the next work process on the surface and a retracted posture above the surface,
As the working device rises from the surface, the right or left marker of the acting posture is operated to the retracted posture, and as the transition to the next work process occurs, the working device rises from the surface. Marker operating means for operating the marker on the opposite side of the right or left marker operated in the retracted posture into the acting posture;
Working device operating means for operating the working device in a non-working state to a working state based on the end of turning of the airframe;
An operating state in which both the marker operating means and the work device operating means are activated, and a stop state in which both the marker operating means and the work device operating means are stopped. Paddy field work vehicle equipped with human operation tools. The work device provided in the aircraft is configured to be operable in working and non-working states,
It is equipped with right and left markers that can be operated in an action posture for grounding to the surface and forming an index of the next work process on the surface and a retracted posture above the surface,
As the working device rises from the surface, the right or left marker of the acting posture is operated to the retracted posture, and as the transition to the next work process occurs, the working device rises from the surface. Marker operating means for operating the marker on the opposite side of the right or left marker operated in the retracted posture into the acting posture;
Working device operating means for operating the working device in a non-working state to a working state based on the end of turning of the airframe;
A first manipulator that is operated artificially by operating the marker operating means in an activated and stopped state, and a second manipulatively operated by operating the working device operating means in an activated and stopped state. With human operation tools,
When one of the first and second artificial operating tools is operated, the other of the first and second artificial operating tools is operated in conjunction with this, and the first and second artificial operating tools are operated. When one of the operating tools is operated in a stopped state, the first and second artificial operating tools are linked so that the other one of the first and second artificial operating tools is operated in a stopped state. Paddy field work vehicle.   The paddy field work vehicle according to claim 1 or 2, further comprising an operation lever that operates the right and left markers to a retracted posture and a working posture, and is manually operated. It has a right side clutch that transmits power to the right rear wheel and a left side clutch that transmits power to the left rear wheel, and the side clutch on the turning center side is disengaged as the aircraft starts turning Configured to be operated on,
Any one of claims 1 to 3 is configured such that the turning of the airframe is terminated when the airframe travels a predetermined distance after the side clutch on the side of the turning center operated in the disconnected state is operated in the transmission state. Paddy field work vehicle as described in one.

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