JP3096718B2 - Rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-row type rice transplanter capable of high-speed planting.

[0002]

2. Description of the Related Art Conventionally, as a seed rice transplanter, a planting section having a plurality of planting claws and a seedling mounting table on a traveling machine body is swung in the machine body width direction via a rolling shaft extending in the machine longitudinal direction. While supporting as possible, the planting section is provided with an inclination sensor for detecting the inclination angle thereof, and an angular velocity sensor for detecting the inclination speed of the planting section, respectively, while between the planting section and the body. By interposing a rolling control mechanism for adjusting the relative angle of the planting section with respect to the aircraft, the operation of the rolling control mechanism based on the detection result of each sensor keeps the planting section always in a horizontal position. However, a method in which the planting depth of the seedlings by each of the planting claws is made constant is already known. As described above, by using the inclination sensor and the angular velocity sensor, and by controlling the posture of the planted portion via the rolling control mechanism based on the detection results from these sensors, the planted portion is accurately and accurately It is possible to quickly control the posture, and therefore, the aircraft is driven at high speed, and a rotary type is used as the planting claw. High-speed planting becomes possible.

In the rice transplanter described above, a main float having a wide flat portion on the front side is provided at the central position below the planting portion, and the main float is similarly leveled on both sides in the width direction of the main float. The main float and the side float are respectively arranged to receive and share the load of the planting portion, and the flattening portion of each float is used to receive the planting claw. To smooth the paddy soil surface on the front side of the planting and eliminate wheel marks formed on the soil surface during running of the aircraft.

[0004]

However, when high-speed planting is performed with the rice transplanter as described above, the following problems occur due to the flattening portions provided on the side floats. . That is, the wide flat portion provided on the tip side of each side float is to level the paddy soil surface on the front side of planting by each planting claw or to erase wheel marks,
When the wide flat portion of each side float is constantly grounded on the paddy soil surface, high-speed planting is performed at the planting portion while the aircraft is running at high speed. At this time, each leveling part pushes out the soil of the paddy field to the side, and the water flow becomes faster with the high-speed running of each leveling part, so that the planting that has been planted on the adjacent strip by these water flow and soil extrusion is performed. The problem is that the seedlings lean and fall, resulting in poor planting postures.

In order to solve the above problems, it is conceivable to remove the side floats. That is, in the rice transplanter capable of high-speed planting as described above, detection from the inclination sensor and the angular velocity sensor is performed. By the operation of the rolling control mechanism based on the result, the posture of the planting portion is accurately and quickly controlled, and the horizontal control correspondence is improved, so that the load allotted to the planting portion by each side float can be reduced to almost zero. It is conceivable to remove each of these side floats, but if each of the side floats is removed, when the aircraft is turned to a paddy end or the like on a headland or the like, the headland or the like may be removed. The leveling by the leveling parts cannot be performed, and the wheels cannot be erased.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has as its object the purpose of keeping the planting part provided with a side float, that is, when the airframe turns on a headland or the like with this side float. It is possible to perform leveling and wheel erasing work, and also to prevent the side float from deteriorating the planting posture of the planted seedling planted on the adjacent streak. An object of the present invention is to provide a rice transplanter capable of performing attachment work.

[0007]

In order to achieve the above object, according to the present invention, the planting section 6 is supported on the body 1 so as to be swingable about a rolling shaft 9 extending in the front-rear direction, and an angular velocity sensor 11 is provided. And a tilting sensor 10, and a rolling control mechanism 12 for adjusting the relative angle of the planting section 6 to the machine body 1 based on the detection results from each of the sensors 10 and 11 to enable high-speed planting. , Side floats 8, 8 provided on both sides in the width direction of the planting portion 6 and provided with a leveling portion 81 in front thereof,
The leveling portion 81 is supported so that the height can be adjusted between a contact position where the contact portion 81 contacts the ground and a non-contact position where the contact portion does not contact.

[0008]

In the above rice transplanter, when performing high-speed planting work by the planting section 6, the wide flat section 81 provided on each side float 8 is moved to the non-ground position. By doing so, despite the fact that each of the side floats 8 is provided in the planting portion 6, each leveling portion 81 is retracted to the non-ground position side, so that the paddy soil by each leveling portion 81 is retracted. Is prevented from being pushed out to the side, and the planting posture of the planted seedling planted on the adjacent strip is prevented from being deteriorated.

On the other hand, in the above-described high-speed planting operation, when the body 1 is turned on a headland or the like to the end of a paddy field or the like, the wide flat portions 81 provided on the side floats 8 are provided. Is moved to the ground contact position, whereby the paddy headlands and the like are leveled by the leveling portions 81, and a large turning wheel mark and the center of the side float 8 are turned when the body 1 turns. Will be shifted in the width direction of the body 1, but the wheel traces at the time of turning will be surely eliminated by the wide flat portions 81.

[0010]

3 and 4 show a multi-row type rice transplanter capable of high-speed planting. A front wheel 2 and a rear wheel 3 are provided at front, rear, left and right positions on a lower side of a traveling body 1, respectively. A driver's seat 4 is provided on the upper side of the body 1, and a top link 51 and a pair of left and right lower links 52, 52 are provided on the rear side of the body 1. The planting section 6 is supported by a vertical link freely via a parallel link mechanism 5 formed by connecting the portal columns 53.

The planting section 6 includes a central transmission case 61 to which power is transmitted from the body 1 side, and a central transmission case 61.
A plurality of planting transmission cases 62 connected to the left and right sides via transmission pipes, a plurality of rotary planting claws 63 and a seedling mounting 64 rotatably supported by the planting transmission case 62, With the rotation of the planting claws 63, the seedlings on the seedling mounting table 64 are sequentially taken out and planted on the paddy soil surface. As shown in FIG. 5, the seedling mounting table 64 of the planting section 6 is provided with a lower rail 65 extending in the machine body width direction on a lower side thereof, and the rail 65 is attached to each of the planting transmission cases 62. And a guide part 66 protruded from the slidably inserted therein, and an upper rail 67 extending in parallel with the lower rail 65 is provided on an upper side of the seedling mounting table 64. 64 on the back side,
The upper rail 67 is slidably inserted into each roller portion 69 attached to the upper end of each column 68 extending upward from each of the transmission cases 61 and 62, and the upper rail 67 slides on the roller portion 69. The lower rail 65 with respect to the guide portion 66
By sliding the seedling mounting 64, the entire seedling mounting 64 is reciprocated in the machine body width direction, and while the seedling mounting 64 is reciprocated, the seedlings mounted on the seedling mounting 64 are planted. The nails 66 are sequentially taken out and planted on the paddy soil surface.

At the lower central position of the planting section 6,
As shown in FIG. 4, the front side has a wide flat portion 71,
A main float 7 having a narrow ground contact portion 72 on the rear side is provided, and a wide flat portion is also provided on the left and right sides of the main float 7 below the planting portion 6 on the front side. Left and right side floats 8, 8 having a narrow ground contact portion 82 on the rear side, respectively, are provided, and the main float 7 and each side float 8 are used to form the planting portion 6.
And share the load of each,
The leveling portions 71 and 81 provided on the floats 7 and 8 level the paddy soil surface on the front side of the planting by the planting claws 63, and the leveling portions 71 and 81 and the grounding portions. 72,8
The front and rear wheels 2, which are formed on the soil surface when the aircraft is running
The third wheel mark is erased.

Further, the planting portion 6 is supported so as to be capable of rolling in the left-right direction with respect to the body 1, that is, as shown in FIG. A cylindrical pivot portion 54 is attached to 53, and the rolling shaft 9 protruding forward from the center transmission case 61 from the central transmission case 61 is rotatably supported on the pivot portion 54,
The entirety of the planting portion 6 can be rolled in the left-right direction with respect to the body 1 around the rolling shaft 9.

The support 68 provided on the planting section 6
A tilt sensor 10 for detecting a tilt angle of the planting portion 6
And an angular velocity sensor 11 for detecting the inclination angular velocity of the planting section 6, respectively, and adjusting the relative angle of the planting section 6 to the machine body 1 between the planting section 6 and the machine body 1. The rolling control mechanism 12 that is enabled is interposed, and the operation of the rolling control mechanism 12 based on the detection results of the sensors 10 and 11 controls the rolling so that the planting section 6 is always in a horizontal position. By
The depth at which the seedlings 63 are planted on the soil surface by the planting claws 63 is always kept constant.

The tilt sensor 10 includes, for example, a movable coil with a pendulum inside a casing, a bridge circuit, and a light-emitting and light-receiving element. A device that detects a change in the amount of light received by the light receiving element and detects a current value output from the movable coil due to a balance change of the bridge circuit accompanying the change in the amount of light received is used.

The angular velocity sensor 11 includes:
For example, a tuning fork type including a piezoelectric bimorph drive element and a detection element and utilizing the generation of a voltage due to the deflection of the drive element due to the inclination of the planting section 6, or a thin disk inside the casing A piezo-plastic film is arranged as a vibrator, and the vertical and horizontal components of the acceleration direction are separated by this vibrator, and the angular velocity is calculated by integrating the acceleration. .

Further, as will be described in detail later, the rolling control mechanism 12 includes a hydraulic cylinder 13 that operates based on the detection results of the sensors 10 and 11 and a switching mechanism that supplies and discharges hydraulic oil to and from the hydraulic cylinder 13. It is composed of a valve and an electromagnetic valve 14 for controlling the switching of the switching valve.

A support rod 55 projecting upward is provided on the portal 53 of the parallel link mechanism 5, and a bracket 56 having a substantially U-shape is attached to the upper side of the support rod 55. The hydraulic cylinder 13 constituting the rolling control mechanism 12 is fixed to 56. As shown in FIG. 6, the hydraulic cylinder 13 includes piston rods 13a protruding from the left and right sides thereof. The connecting rod 68a is connected between fixed plates 68b mounted on both sides in the length direction of the connecting rod 68 via universal joints 13b.
By advancing and retracting a, the entire planting portion 6 is swung in the left-right direction about the rolling shaft 9 via the connecting rod 68a and each of the columns 68.

In controlling the rolling control mechanism 12 based on the detection results from the sensors 10 and 11, the inclination sensor 10 and the angular velocity sensor are provided on the input side of the controller 15 as shown in FIG. 11
An automatic switch 16 for performing automatic rolling control of the planting section 6, an angle setting dial 17 for performing angle setting of the angular velocity sensor 11, and a manual switch 18 for manually performing rolling control of the planting section 6. , Respectively, and the output side of the controller 15 is connected to the electromagnetic valve 14 constituting the rolling control mechanism 12, and the output side of the electromagnetic valve 14 is connected to the hydraulic cylinder 13. When performing automatic rolling control of the planting section 6 by turning on the automatic switch 16, based on the inclination angle and angular velocity of the planting section 6 detected by the sensors 1 and 11, By controlling the switching of the electromagnetic valve 14 with an output signal output from the controller 15 and supplying and discharging the pressure oil into and from the hydraulic cylinder 13, the entirety of the planting portion 6 around the rolling shaft 9 is controlled. It swings right and left.

As described above, the rolling control mechanism 12 is operated by the output from the controller 15 based on the detection results of the sensors 10 and 11, and the planting section 6 is operated.
By performing the rolling control, the posture of the planting portion 6 can be accurately and quickly controlled. Therefore, the machine body 1 can be driven at high speed, and the rotary planting claw 63 provided in the planting portion 6 can be controlled. By rotating at a high speed, high-speed planting by the planting section 6 becomes possible.

In the rice transplanter capable of high-speed planting as described above, each of the side floats 8, 8 disposed on both sides in the width direction below the planting portion 6 is replaced with each flat portion 81 thereof. The height is supported at a contact position where the contact is made and a non-contact position where the contact is not made.

Specifically, as clarified in FIG.
First and second protruding pieces 19 and 20 are respectively provided at upper and lower portions of the side floats 8, that is, at upper portions of the flat portion 81 and the ground portion 82 of each side float 8. Then, the second projecting piece 20 is connected to the planted transmission case 62.
In addition to pivotally supporting a support arm 21 supported by the first arm 19, an adjustment arm 22 extending upward is pivotally supported by the first protrusion 19 so as to be swingable, and the upper end of the adjustment arm 22 is Operation wire 2 extending from operation lever provided near
3 and the wire 23 is tensioned and relaxed by operating the lever, whereby the entire side float 8 is vertically swung about a pivotal support portion between the second projecting piece 20 and the support arm 21. Accordingly, the height of the flat portion 81 of the side float 8 is adjusted between a contact position (solid line position in the figure) and a non-contact position (virtual line position in the figure) with respect to the soil surface A of the paddy field. As described above, since each of the side floats 8 adjusts the height of each of the leveling portions 81 to the grounded position and the non-grounded position, the leveling of the leveled portions 81 is performed in order to smoothly perform the height adjustment. The rear portion of each of the grounding portions 82 connected to the portion 81 is cut near the pivotal support portion between the second protruding piece 20 and the support arm 21 so that the overall length is shorter than the length of the main float 7.

In FIG. 1, the adjusting arm 2
2, a vertically extending elongated hole 22a is formed, and a restricting pin 22b that protrudes into the elongated hole 22a is provided on the front side of the planting transmission case 62. The pin 22b and the elongated hole 22a The adjustment arm 22 is guided in the vertical direction in accordance with the operation of the wire 23, and a wire receiver for holding the wire 23 near the adjustment arm 22 is provided on the front side of the planting transmission case 62. 24 is attached. Further, the support arm 21 is supported so as to be adjustable in angle by a planting depth correction pipe 62a provided on the planting transmission case 62 side, and by adjusting the angle of the support arm 21 through the planting depth correction pipe 62a. By adjusting the depth of the side float 8 with respect to the soil surface A, the planting portion 6 can perform planting depth correction.

Further, the flat portion 81 of the side float 8
When adjusting the height of the operation wire 23 to the above-mentioned contact position and the non-contact position, as shown in FIG.
And a screw cylinder 26 is attached to the connecting plate 25 on the side opposite to the wires 23, and the screw cylinder 26
The screw shaft 28 extending from the motor 27 is screwed into the screw cylinder 2 so that the screw shaft 28 is
6, the wires 23 are tensioned and relaxed via the connecting plate 25, and the flat portions 8
The height adjustment of 1 may be performed. In this case, a speed sensor for detecting the running speed of the machine body is used, and the leveling portion 81 can be automatically adjusted to the non-contact position at the time of high-speed planting, and can be automatically adjusted at the time of turning on a headland or at a low speed. In adjusting the height of the leveling portion 81, the adjusting arm 22 and the planting transmission case 62 provided on the leveling portion 81 side can be used without using the operation wire 23 as described above. A lock mechanism for manually locking the flat portion 81 between the ground position and the non-ground position is provided, and the flat portion 81 is moved between the ground position and the non-ground position via the lock mechanism. It is also possible to position it manually.

Next, the operation of the rice transplanter configured as described above will be described. First, when performing high-speed planting work by the planting section 6, the wide flat portion 81 of each side float 8 is separated from the paddy soil surface A as shown by the phantom line in FIG. It is moved to the non-ground position on the upper side, so that each flat portion 81 is moved to the non-ground position despite the side floats 8 being provided in the planting portion 6. Because it has been evacuated,
Extrusion of paddy soil to the side by each leveling section 81 and wave formation or rapid water flow disappeared due to high-speed running of each leveling section 81, so that planted seedlings planted on adjacent strips were not planted. Deterioration of the attachment posture is prevented. In particular, as shown in the figure, the distance between the paddy soil surface A and the water surface B is usually 3 mm.
cm, and by retreating each of the flat portions 81 upward, water on the soil surface A flows through the lower side of each of the flat portions 81. With the high-speed running of the leveling section 81, waves and fast water currents are eliminated, and the adverse effects of these waves and fast water currents on the planting seedlings of the adjacent streaks can be eliminated. Further, during the high-speed planting operation as described above, the front and rear wheels 2, formed on the soil surface A,
The wheel marks of No. 3 are erased by the contact portions 82 which are continuous with the flat portions 81 of the respective side floats 8.

At the time of high-speed planting as described above, the operation of the rolling control mechanism 12 based on the detection results from the inclination sensor 10 and the angular velocity sensor 11 allows the planting section 6 to accurately and quickly control the posture. As a result, the level control capability is remarkably improved, and the load shared by the side floats 8 on the planting portion 6 can be reduced to almost zero. Even if the plant is retracted upward from the surface A, the planting operation by the planting section 6 is not affected.

Further, in the above-described high-speed planting operation, when the body 1 is turned on a headland or the like to the end of a paddy field or the like, the wide flat portions 81 of the side floats 8 are used.
Is moved to the contact position side contacting the soil surface A as shown by the solid line in FIG. 1. 81, and the trace of the turning wheel and the trace of the passage of the center of the side float 8 when the body 1 turns are shown in FIG.
However, the wheel marks are surely erased by the wide flat portions 81.

[0028]

As described above, in the present invention, the airframe 1
The planting part 6 is supported so as to be swingable about a rolling shaft 9 extending in the front-rear direction, and is provided with an angular velocity sensor 11 and an inclination sensor 10, based on the detection results from these sensors 10, 11. In a rice transplanter capable of high-speed planting by providing a rolling control mechanism 12 for adjusting the relative angle of the planting section 6 to the machine body 1, the rice planting machine is disposed on both sides in the width direction of the planting section 6 and has a flattening section in front. Since the side floats 8 provided with the bases 81 are supported in a height-adjustable manner at a grounded position where the leveling portion 81 of the side floats 8 is grounded and at a non-grounded position where the flats 81 are not grounded, high speed planting is performed by the planting portion 6. When performing the attaching operation, by moving the wide flat portion 81 provided on each of the side floats 8 to the non-ground position, the planting portion 6 is provided with each of the side floats 8, Paddy field by each flat part 81 Such is gone extrusion into the side of the soil, it can be prevented from or poor planting attitude of planting seedlings were planted in the adjacent strip. In addition, during the high-speed planting operation as described above, when the body 1 is turned on a headland or the like to the end of a paddy field or the like, the flat portions 8 of the side floats 8 are rotated.
1 can be leveled at each of the leveling portions 81 by moving the headland to the ground position.
When the vehicle turns, the trace of the turning wheel and the trace of the passage at the center of the side float 8 are displaced in the width direction of the body 1. The wheel trace at the time of the turning is surely erased by the wide flat portions 81. You can do it.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing a side float portion which is a main part of a rice transplanter according to the present invention.

FIG. 2 is a plan view showing another embodiment of the side float height adjusting means.

FIG. 3 is a side view showing the entire structure of the rice transplanter.

FIG. 4 is a plan view of the rice transplanter.

FIG. 5 is an enlarged side view of the planting portion with a part cut away.

FIG. 6 is a plan view showing a rolling control mechanism.

FIG. 7 is a control block diagram of the rolling control mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 6 Planting part 8 Side float 81 Leveling part 9 Rolling axis 10 Tilt sensor 11 Angular velocity sensor 12 Rolling control mechanism

Claims (1)

(57) [Claims] A planting section is supported on a body of a vehicle so as to be swingable about a rolling shaft extending in a front-rear direction, and an angular velocity sensor and an inclination sensor are provided. In a rice transplanter capable of high-speed planting by providing a rolling control mechanism 12 for adjusting the relative angle of the planting section 6 to the machine body 1 based on the detection result, the rice planting machine is disposed on both sides in the width direction of the planting section 6. , Side floats 8, 8 having a flat portion 81 in front thereof,
8. A rice transplanter characterized in that the leveling portion 81 of the rice transplanter is supported in a height-adjustable manner between a contact position where the contact portion is contacted and a non-contact position where the contact portion is not contacted.