JP2002125423A - Rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably maintain performances of a field hardness sensor installed in a float and capable of detecting the field surface hardness. SOLUTION: This rice transplanter is obtained by installing the field hardness sensor (60) in a bottom groove (71) of a center float (34) in the rice transplanter equipped with the field hardness sensor (60) capable of detecting the field surface hardness by a change in tilt of a sensor arm (65) to be brought into contact with ground of the field surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice transplanter in which a planting section is controlled to move up and down based on a change in the inclination angle of a float supported by the planting section.

[0002]

Conventionally, when the field hardness is hard, the planted portion rises and becomes shallowly planted, and when the field is soft, the planted portion sinks and becomes deeply planted. In the meantime, the worker determines the field hardness and corrects the hydraulic sensitivity (the target tilt angle of the center float) to an appropriate sensitivity so as to maintain the planting depth constant. You have to do it every time the conditions change,
Judgment was also difficult and lacked accuracy. Therefore, for example, there is provided a hard / soft sensor that supports the sensor arm in a free state at the rear end of the float and automatically corrects the hydraulic sensitivity by detecting the field hardness when the arm is sunk with respect to the field. When the sensor arm wraps around the mark, the detection accuracy is reduced, and when the sensor arm contacts an obstacle such as a ridge, the sensor arm is damaged.

[0003]

SUMMARY OF THE INVENTION Accordingly, the present invention relates to a rice transplanter provided with a field hardness sensor for detecting the field surface hardness by changing the inclination of a sensor arm grounded to the field surface. A sensor is provided to avoid the lap between the trace of wheel passage and the position of the hard / soft sensor to improve the detection accuracy of the hard / soft sensor, and to keep the hard / soft sensor in the float groove even when the outer periphery or bottom of the float comes in contact with an obstacle. This is to prevent the occurrence of breakage.

When the center float is directly lowered on an obstacle such as a ridge when the planting part is lowered by placing the sensor arm above the lowermost end of the float when the sensor arm is moved upward, or when the planting work is performed. Even when the middle field is very hard or the hard / soft sensor comes into contact with an obstacle, the hard / soft sensor is kept from being damaged, and the detection accuracy is properly maintained.

Further, a hard / soft sensor is provided near the float angle sensor for detecting the inclination angle of the center float,
The hard and soft sensors and the float angle sensor, which are in close relation, are made to act on a field under substantially the same conditions, thereby improving detection accuracy and adaptability to field conditions.

[0006] Furthermore, by using a support member at the front portion of the center float, which is connected and supported to the planting portion, as a mounting member for the hard / soft sensor, it is unnecessary to separately install a mounting member for the hard / soft sensor, thereby reducing the number of parts. An object of the present invention is to reduce the manufacturing cost and facilitate the assembly and adjustment of the hard / soft sensor.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view of a riding rice transplanter, and FIG. 2 is a plan view of the same. In FIG. 1, (1) is a traveling vehicle on which an operator rides, and an engine (2) is mounted on a body frame (3). A front paddle traveling wheel (6) is supported in front of a case (4) via a front axle case (5), and a rear axle case (7) is connected to a rear portion of the transmission case (4). 7) Support the paddy field rear wheel (8). A spare seedling mount (10) is attached to both sides of the hood (9) covering the engine (2) and the like, and the step of getting on and off (1)
The transmission case (4) and the like are covered by a body cover (12) on which an operator rides via 1), and a driver's seat (13) as an operation unit is mounted on the upper part of the body cover (12). 13) In front of the hood (9)
A steering handle (14) is provided at the rear.

[0008] In the figure, (15) is a planting section provided with a seedling mounting table (16) for six-row planting and a plurality of planting claws (17). Forward tilting seedling platform (1
6) is supported on a planting case (20) via a lower rail (18) and a guide rail (19) so as to be reciprocally slidable right and left, and a rotary case (21) is rotated at a constant speed in one direction. A pair of claw cases (22) and (22) are supported at the case (20) and symmetrically positioned around the rotation axis of the case (21), and the claw case (22) is provided.
(22) Attach the planting claws (17) and (17) to the tip. A hitch bracket (24) is provided on the front side of the planting case (20) via a rolling fulcrum shaft (23), and is provided via a lifting link mechanism (27) including a top link (25) and a lower link (26). A hitch bracket (24) is connected to the rear side of the traveling vehicle (1), and the link mechanism (2)
7) a piston rod of a hydraulic elevating cylinder (28), which is a hydraulic elevating control mechanism for elevating and lowering the planting section (15), is connected to a lower link (26), and the front and rear wheels (6) are connected.
(8) is driven to move and at the same time, a seedling for one plant is planted from the seedling mounting table (16) which is reciprocally slid left and right.
7), the seedlings are continuously planted.

In the drawing, (29) is the main speed change lever, (3)
0) is a planting lever that is also a sub-transmission lever, (31) is an auxiliary sensitivity setting device, (32) is a main clutch pedal, (33)
(33) is a left and right brake pedal, (34) is a two-floor leveling center float, (35) is a two-floor leveling side float, and (36) is a six-floor side row fertilizer.

As shown in FIGS. 3 to 6, a pitching fulcrum shaft (37) for swingably supporting the front portion of the center float (34) up and down is provided on a bracket (38) on the rear upper surface of the float (34). The base of the planting depth adjusting link (40) is fixedly mounted on a planting depth adjusting fulcrum shaft (39) rotatably supporting the planting case (20). ) Is connected to the pitching fulcrum shaft (37).

The intermediate portion of the output link (43) is rotatably supported on a support shaft (42) supported on the side of the planting case (20) via a fixed arm (41). ), A rear end of an output link (43) is connected to a distal end of a swing arm (44) having a base end fixed thereto via a coupling pin (45), and a shaft (46) at the front end of the output link (43). Link (48) via guide groove (47)
And a lower end of the lifting link (48) is connected to a front fulcrum shaft (50) of a bracket (49) fixed to the front upper surface of the center float (34).

A potentiometer type float angle sensor (5) is provided on a connecting plate (51) between the shafts (42) and (46).
2) Attach the detection arm (53) of the sensor (52)
Detecting axis (55) of lifting link (48) in long hole (54)
When the planting depth changes due to unevenness of the tillage or a change in the depth, the float angle sensor (52) detects the change.

Further, a planting depth motor (57) is connected to a planting depth adjusting lever (56) having a base end fixed to the fulcrum shaft (39), and the reference planting is performed by drive control of the motor (57). Potentiometer type planting depth sensor (58) for adjusting the depth and detecting the moving position of the adjusting lever (56)
Are provided on the motor mount (59) to detect the planting depth position.

When the planting depth is changed about the fulcrum shaft (39) by the planting depth motor (57) or the adjusting lever (56), the vertical position of the pitching fulcrum shaft (37) and the front end of the output link (43) are changed. The vertical change position of the shaft (46) is made substantially the same so that the output of the float angle sensor (52) is not changed even if the planting depth is changed.

As shown in FIGS. 7 to 9, a potentiometer type hard / soft sensor (60) for detecting the surface hardness of a field is attached to a fixing bracket (49) of the center float (34). (61) is fixed to the horizontal upper surface (34a) on the front end side of the float (34) via bolts (62), and the soft / soft sensor (63) is mounted on the bottom plate (61) behind the left and right brackets (49) via the sensor base (63). 60) is detachably fixed. Further, the base end of the sensor arm (65) is fixed to a sensor shaft (64) rotatably supported below the front fulcrum shaft (50) between the left and right brackets (49).
4) A sensor arm (65) is arranged on the left and right central lines in a front-to-back and rear-to-back manner, and a rear end of the arm (65) is floated through a long slot (66) formed in the float upper surface (34a). 34) Projecting downward, the V-shaped bent portion (65a) at the rear end of the arm (65) is provided so as to be constantly in contact with the surface of the field by the force of a spring (67) biasing the arm (65). Then, the notch groove (70) of the detection arm (69) of the hard / soft sensor (60) is engaged with the detection shaft (68) fixed to the front end side of the sensor arm (65), and the vertical movement of the sensor arm (65) is changed. Hardness and softness sensor (60)
To detect the surface sensitivity of the field (hard when the amount of settlement is small, and soft when the amount of settlement is large).

The sensor arm (65) is inserted through a drain groove (71) formed on the lower surface of the center float (34). ) And float (34)
While the mud and soil on the lower surface are guided and discharged backward, the bent portion (65a) comes into contact with obstacles such as ridges and stones so that the arms (6
When 5) moves upward, the arm (65) is housed in the drain groove (71) to prevent damage to the arm (65).

As shown in FIG. 10, it is possible to mount a paste fertilizer (72) for fertilizing the paste fertilizer, and a fertilizer tank (7) for storing the paste fertilizer.
3), a screw-type fertilizer pump (75) driven by a motor (74), fertilizer pipes (76) (77) for two-stage lateral and deep fertilization, and a fertilizer pipe (76) from the fertilizer pump (75). ) (77) and a stop valve (78) for stopping the supply of fertilizer to the fertilizer application device (72), and the arm (6) is provided on the left and right central lines of the float (35).
5) A fertilizer pipe for deep layer (7) is located behind the slot (66).
7) Opening a long hole (79) through which the hard / soft sensor (60) is arranged in front of the fertilizer (72),
Even when the fertilizer device (72) is equipped, the fertilizer pipe (7
6) The hard / soft sensor (60) in which the resistance effect of (77) is reduced can be detected with good accuracy.

As is apparent from the above description, in a rice transplanter equipped with a field hardness sensor (60) for detecting the field surface hardness by a change in the inclination of the sensor arm (65) grounded to the field surface, the center float (34) is used. ) Is provided with a hard / soft sensor (60) in the drain groove (71), which is the bottom groove part, to avoid the lap between the wheel passage mark and the position of the hard / soft sensor (60), thereby improving the detection accuracy of the hard / soft sensor (60). At the same time, the sensor arm (6) of the hard / soft sensor (60) can be used even when the outer periphery or bottom of the float (34) comes into contact with an obstacle.
5) can be favorably maintained in the float drain groove (71) to prevent breakage and the like.

The float (34) of the sensor arm (65) is positioned above the lowermost end of the float (34) at the time of the upward movement. When the field is lowered directly, or when the field is very hard during the planting operation, or when an obstacle is
In the case where the contact is made, the hard / soft sensor (60) can be kept from being damaged, and the detection accuracy can be appropriately maintained.

Further, a hard / soft sensor (60) is provided near the float angle sensor (52) for detecting the inclination angle of the center float (34), and the hard / soft sensor (60) and the float angle sensor which are closely related to each other. (52) is made to act on the field under substantially the same conditions to improve detection accuracy and adaptability of the field conditions.

Further, a bracket (49) which is a support member at the front part of the center float (34) connected and supported by the planting portion (15) is used as a mounting member of the hard / soft sensor (60). By eliminating the need to separately install the mounting member of (60), the number of parts can be reduced, the manufacturing cost can be reduced, and the assembly and adjustment of the hard / soft sensor (60) can be facilitated.

The shallow and deep side circuits (80) and (81) of the planting motor (57) and the raising and lowering valves (83) and (84) of the raising and lowering valve (82) for driving the raising and lowering cylinder (28). ) For operating the lifting and lowering solenoids (85) and (86), and detecting the planting lowering and raising of the planting lever (30) and the planting clutch engagement position. A potentiometer type lever sensor (88), a planting depth switch (89) for starting planting depth control, and a lower link (2)
A link sensor (9) for detecting the elevation position of the planting section (15) from the movement position of the lift arm (90) connected to (6).
1), the float angle sensor (52), the planting depth sensor (58), the hard / soft sensor (60), and the auxiliary sensitivity setting device (31) are input connected to the controller (87),
It is configured to control the drive of the planting motor (57) and the elevating valve (82).

This embodiment is constructed as described above, and the center angle (3) is detected by the float angle sensor (52).
4) The inclination angle is detected, and the elevation valve (82) is driven so that the angle becomes a target value (oil pressure sensitivity) to perform elevation control, and correction according to oil pressure sensitivity is continuously performed by planting depth control. The center float (34) set based on the detection of the hard / soft sensor (60) in the elevation control mode in which the planting section (15) descends. Target value (V1) which is the target inclination angle of
Until the sensor value (V) read by the float angle sensor (52) matches (the target float angle of the center float (34)).
5) is controlled to be lowered, and thereafter, the raising / lowering control of the planting section (15) for maintaining the target planting depth constant (V = V1) is performed.

As shown in FIG. 13, when the hard / soft sensor (60) detects softness or hardness of the surface hardness of the field during this control, the target value (V) of the hydraulic sensitivity corresponding to the hardness is detected.
The target value (V2) is maintained constant (V = V2) by raising and lowering the planting section (15).

[0025]

As is apparent from the above embodiments, the present invention relates to a rice transplanter having a field hard / soft sensor (60) for detecting a field surface hardness based on a change in inclination of a sensor arm (65) which is grounded on a field surface. In the center float (3
Since the hard / soft sensor (60) is provided in the bottom groove portion (71) of 4), the hard / soft sensor (60) can be accurately detected without being affected by traces of the passage of wheels, and the hard / soft sensor (60) can be detected. ) Can be maintained, and the performance can be stably maintained.

Since the sensor arm (65) is positioned above the lowermost end of the float (34) when the sensor arm (65) is moved upward, the hard / soft sensor (60) can be kept from being damaged, and the detection accuracy can be properly maintained. Things.

Further, since the hard / soft sensor (60) is disposed near the float angle sensor (52) for detecting the inclination angle of the center float (34), the detection accuracy of the hard / soft sensor (60) and the field condition This is to improve the adaptability.

Further, the support member (49) in front of the center float (34) connected and supported by the planting portion (15) is used as a mounting member for the hard / soft sensor (60), so that the number of parts is reduced. To reduce the manufacturing cost,
This facilitates assembly and adjustment of the hard / soft sensor (60).

[Brief description of the drawings]

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

FIG. 2 is an overall plan view of the rice transplanter.

FIG. 3 is a side view of the planting section.

FIG. 4 is a plan view of a float unit.

FIG. 5 is a side view of a center float portion.

FIG. 6 is a plan view of a center float portion.

FIG. 7 is a front sectional view of a center float portion.

FIG. 8 is a plan view of a hard / soft sensor part.

FIG. 9 is a side view of a hard / soft sensor part.

FIG. 10 is an explanatory view of a paste fertilizer.

FIG. 11 is a control circuit diagram.

FIG. 12 is a flowchart.

FIG. 13 is a graph showing the relationship between the float control angle and the field surface hardness.

[Explanation of symbols]

 (15) Planting part (34) Center float (49) Bracket (support member) (52) Float angle sensor (60) Hard / soft sensor (65) Sensor arm (71) Drainage groove (groove)

Claims (4)

[Claims] 1. A rice transplanter provided with a field hard / soft sensor for detecting field surface hardness by a change in inclination of a sensor arm which is grounded on a field surface, wherein a hard / soft sensor is provided in a bottom groove of a center float. Rice transplanter. 2. The rice transplanter according to claim 1, wherein the sensor arm is positioned above the lowermost end of the float when the sensor arm is moved upward. 3. The rice transplanter according to claim 1, wherein a hard / soft sensor is provided near a float angle sensor for detecting an inclination angle of the center float. 4. The rice transplanter according to claim 1, wherein a support member at a front portion of the center float, which is connected to and supported by the planting portion, is used as a mounting member of the hard / soft sensor.