JPH07114584B2 - Rolling posture control device in 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 an automatic controller for a rolling posture in a seedling planting device for a riding type rice transplanter.

[0002]

2. Description of the Related Art Generally, a seedling planting device for a riding type rice transplanter is
In many cases, a plurality of seedling planting mechanisms are arranged side by side so that seedlings can be planted along multiple rows in a field scene at appropriate intervals on the left and right in the traveling direction of the traveling aircraft. In this case, the depth of seedling planting for the left and right field scenes of the seedling planting device must be constant.

However, since the field scene in which the float contacts the ground and the cultivator in which the wheels of the traveling machine contact the ground in the seedling planting device have irregularities, respectively, and the field scene and the cultivator are not always parallel, the seedling planting device It will be rolling motion to the field scene. When the seedling planting device rolls with respect to the field scene in this way, the vertical height of the seedling planting device differs from that of the field scene at the left and right positions. Therefore, one of the planting depths at the left and right positions is deeper. However, the seedling planting depth was not constant such that the other plant became shallow, and the survival of seedlings was poor at the deep planting depth, and floating seedlings were produced at the shallow planting depth.

[0004] Therefore, as a prior art, the actual development Sho 58-9
No. 4313 discloses that the seedling planting device is mounted on the rear ends of the top link and the lower link extending rearward from the traveling machine body so that the seedling planting device can be rolled around a rolling shaft extending in the front-rear direction. The motor is configured to roll, while the left and right side floats in the seedling planting device and the motor are moved in a direction in which the motor raises the seedling planting device on one side when one side float moves upward. When the rolling motion is made and the other side float moves upward, the motor is operated so as to make the seedling plant move in a rolling motion in the direction of lifting the other side float, thereby making it possible to set the posture of the seedling plant to the field scene substantially. Proposes to keep it constant.

[0005]

However, in the prior art, the seedling planting device is configured to roll with respect to the traveling machine only when one of the two side floats moves upward. However, since the width of the control is narrow, the seedling planting device can be properly controlled according to the unevenness in the field, instead of rolling the seedling planting device according to the downward movement of the one side float. There was a problem that rolling control was not possible.

In addition, in the prior art, the rolling shaft, which is the center of the rolling motion in the seedling planting device, is abbreviated as a lower link among the top link and the lower link for connecting the seedling planting device to the traveling body. Since the distance from the rolling shaft to the floats on both sides is short and the floats on both sides move up to a certain height, the seedlings follow this when the two parts are arranged at the same height. There is also a problem that the rolling control sensitivity is low because the rotation angle when rolling the planting device to a state substantially parallel to the field scene becomes large.

An object of the present invention is to solve these problems without causing an increase in weight and an increase in size.

[0008]

In order to achieve this object, the present invention provides a seedling planting device having at least a pair of left and right side floats at the rear ends of a top link and a lower link extending rearward from a traveling machine body. In a rice transplanter that is mounted so as to be rotatable around a rolling shaft extending in the front-rear direction of the traveling body, the pair of left and right side floats can be independently moved up and down with respect to the seedling planting device. On the other hand, a rolling control shaft is provided on the traveling body side so as to reciprocate in a direction substantially perpendicular to the axis of the rolling shaft by forward and reverse rotations of a motor attached to the traveling body side. The seedling planting device is associated so that the rolling motion of the rolling control shaft causes the seedling planting device to roll with respect to the traveling machine body. The motor for moving the side portions flow
The height difference is eliminated according to the height difference between the two
Means for rotating in the forward and reverse directions in the same direction, and further, the rolling shaft is arranged at a position at a height between the top link and the lower link, and the both side floats are used for seedling planting. Located on the left and right sides of the device. "."

[0009]

Embodiments of the present invention will now be described with reference to the drawings. In the figure, reference numeral 1 indicates a traveling machine body, and the traveling machine body 1
Is the vehicle body frame 2 and the two front wheels 3 attached to the lower surface of the front portion thereof.
And the rear two wheels 5 mounted on the lower surface of the rear through the chain case 4.
And a control seat 6 on the upper surface of the body frame 2.
And a steering handle 7, and is configured to run by driving an engine 8 mounted on the front upper surface of the body frame 2.

Reference numeral 9 denotes a seedling planting device located at the rear portion of the traveling machine body 1. The seedling planting device 9 includes a transmission case 10 and
Three planting cases 11 mounted laterally from the transmission case 10 at appropriate intervals, and a pair of left and right side floats 12a and 12b mounted on the lower surface of each planting case 11, respectively.
A center float 13 and a seedling stand 14 whose upper end is inclined so as to approach the traveling body 1 are provided with a vertically swingable seedling planting mechanism 15 at the rear end of each planting case 11. There is.

The base ends of a pair of left and right lower links 16 are pivotally attached to the lower rear portion of the traveling body 1 and the base ends of a single top link 17 are pivotably attached to the upper rear portion.
Between the top link 17 and the top link 17, a hydraulic cylinder 37 for moving the seedling planting device 9 up and down greatly is provided. A pair of upper and lower pin shafts 1 is provided between the joint plates 18 arranged on both left and right sides of the tip portions of the lower links 16 and the top link 17.
9 and 20, the tip ends of the top links 17 are pivotally attached to the upper pin shafts 19 thereof, and the tip ends of the lower links 16 are pivotally attached to the lower pin shafts 20, respectively, and the joint plates 1
A pair of upper and lower hitch pins 21 and 22 are mounted between the eight, while the side surface of the transmission case 10 of the seedling planting device 9 facing the rear surface of the traveling body 1 has a rolling shaft at a position on the plane center line of the traveling body 1. Bracket plate 23 with 24,
The bracket plate 23 is attached so that the rolling shaft 24 is located at a position at a height approximately midway between the lower link 16 and the top link 17, and the bracket plate 2 is attached.
Hitch body 25 formed in a U-shape in a plane so as to be inserted between the joint plates 18 on the rolling frame 24 in FIG.
Is rotatably fitted to the left and right side plates 26 of the hitch body 25, and a downward hook portion 27 for catching the upper hitch pin 21 is provided on the upper portion and a lower hitch pin 22 is provided on the lower portion.
While each of the recesses 28 into which the hitches can be fitted is provided, the hitch body 25
Between the left and right side plates 26, the hitch shaft 29 is attached to both hitch pins 2
The lever handle 30 is fixed to one end of the hitch shaft 29 so that the hitch shaft 29 can be rotated by the lever handle 30. The hitch shaft 29 between the eccentric cam 31
A hook lever 32 adapted to be hooked on the lower hitch pin 22 is rotatably fitted to both of the eccentric cams 31, and both hook levers 32 can be simultaneously rotated through a pipe 33. Connect, one hook lever 3
2 between the pin 34 protruding outward from one end and the pin 35 protruding outward from the lever handle 30 when the lever handle 30 is rotated toward the seedling planting device 9 side, both hook levers. A spring 36 is mounted to urge the lower hitch pin 22 toward the lower hitch pin 22.

Further, the floats 12a and 12b on both sides are formed.
Is attached to a horizontal bar 38 mounted on the lower surface of each planting case 11 in a direction perpendicular to the traveling direction via link mechanisms 39a and 39b so that the front portion can freely move up and down. 39b, one end of the wire 40a, 40b for each of them, each side float 12a,
By the upward movement of the front portion 12b, both wires 40a, 4a
Attach 0b so that 0b can be pulled.

A rolling control shaft 42 extending in a direction perpendicular to the traveling direction is slidably supported in a lateral direction in a gear case 41 attached to the hitch body 25 on the traveling machine body 1 side, and the rolling control is performed. Two projections 43a and 43b are fixed to the shaft 42, and both projections 43a and 43b are fixed.
In between, the bracket plate 23 on the seedling planting device 9 side
Insert the protruding piece 44 that integrally protrudes from the
Rolling control springs 45a and 45b are respectively inserted between the both sides of each of the projections 43a and 43b, and the rolling control shaft 42 slides so that the seedling planting device 9 rolls with respect to the traveling machine body 1. To configure.

The rolling control shaft 42 in the gear case 41 is provided with a male screw portion 46 of a right screw, and a screw gear 47 is screwed into the male screw portion 46, and the screw gear 47 is
When the forward / reverse rotation type rolling control motor 48 mounted on the side surface of the gear case 41 rotates rightward, the rolling control shaft 42 slides leftward as indicated by an arrow A and rotates leftward. The rolling control shaft 42 is configured to slide to the right as indicated by arrow B.

On the other hand, a base end of a rolling sensor arm 49 is rotatably attached to the traveling machine body 1 or the seedling planting device 9 by a pin 50 so as to be rotatable and slidable in a long groove 51 formed in the rolling sensor arm 49. To the engaging element 52 fitted to the wire 40 connected to the floats 12a and 12b on both sides.
When the wire 40b of the right side float 12b is pulled, the rolling sensor arm 49 rotates to the right, and when the wire 40a of the left side float 12a is pulled, the springs 57a and 57b at the other ends of the a and 40b are rolled. The sensor arm 49 is attached so as to rotate leftward.

Then, the rolling sensor arm 4
On both sides of 9, the limit switches 53a and 53b which are turned on by the contact of the rolling sensor arm 49 are arranged, and the both limit switches 53a and 53b are arranged in the electric circuit 54 to the rolling control motor 48. Rolling control motor 4 when left limit switch 53a is turned on
8 drives the screw gear 47 to rotate leftward, and when the right limit switch 53b is turned on, the rolling control motor 4 is rotated.
A screw gear 47 is inserted so as to drive-rotate the screw gear 47 in the direction of clockwise rotation.

That is, the rolling control motor 48
Between the floats 12a and 12b on both sides.
Forward and reverse rotation in the direction to eliminate the height difference according to the height difference
To configure. Reference numerals 56a and 56b denote restoring springs for rolling, and the spring force of both rolling restoring springs 56a and 56b is smaller than that of the rolling controlling springs 45a and 45b.

In this mechanism, the seedling planting device 9 operates in the field scene 5.
When the rolling movement is not performed with respect to 5, that is, when the left and right sides of the seedling planting device 9 are at predetermined height positions with respect to the field scene 55, both side floats 12a and 12b do not move upward. The rolling sensor arm 49, which is interlocked via the respective wires 40a and 40b, is in a neutral position where it does not rotate in either the left or right direction, and neither of the limit switches 53a and 53b is turned on. Therefore, the rolling control motor 48 Is stopped, and the rolling control by the rolling control motor 48 is not performed.

Next, by rolling the seedling planting device 9 with respect to the farm scene 55, the seedling planting device 9 is tilted so that its left side is lowered with respect to the farm scene 55, so that the floats 12a and 12b are sandwiched between the side floats 12a and 12b. When there is a difference in height, the left side float 12a is moved upward to pull the rolling sensor arm 49 leftward with the wire 40a, while the right side float 12b is moved downward to move the wire 40b relative to the rolling sensor arm 49. Since the pulling in the right direction will be loosened, the rolling sensor arm 49 is attached to both side floats 12a and 12b.
The left limit switch 53a is turned on by rotating to the left due to the difference in height. Then, the rolling control motor 4
8, the rolling control shaft 42 is rotationally driven so as to slide to the right as shown by the arrow B in FIG. 8, so that the inclination of the seedling planting device 9 to the left is corrected.

Further, when the seedling planting device 9 is inclined so that its right side is lowered with respect to the field scene 55, a height difference is created between the floats 12a and 12b on both sides, and the float 12b on the right side is moved upward. At this time, while pulling the rolling sensor arm 49 to the right with the wire 40b, the pulling of the wire 40a to the left with respect to the rolling sensor arm 49 is loosened by the downward movement of the left side float 12a. The rolling sensor arm 49 has the floats 12a and 12b on both sides.
The right limit switch 53b is turned on by rotating in the right direction due to the difference in height. Then, the rolling control motor 4
8, the rolling control shaft 42 is rotationally driven so as to slide leftward as shown by arrow A in FIG. 8, so that the inclination of the seedling planting device 9 to the right is corrected.

As a result, the rolling of the seedling planting device 9 with respect to the field scene 55 is automatically controlled so that the height with respect to the field scene 55 at the left and right positions of the seedling planting device 9 is always substantially constant, and the seedling planting depth is increased. However, the seedlings can be planted at a substantially constant depth without becoming deep on the one hand and shallow on the other. If the bracket 58 that supports the pivot pin 50 of the rolling sensor arm 49 is movably attached to the traveling machine body 1 or the seedling planting device 9 in the longitudinal direction of the rolling sensor arm 49, the movement can be achieved. The sensitivity of the automatic control can be adjusted.

[0022]

The function and effect of the present invention are as follows. Rolling control motor for rolling movement of the seedling planting apparatus to the running body as described above, the both side portions float phase
Direction to eliminate the height difference according to the height difference between them
With this configuration, the rolling control for the field scene in the seedling planting device can be performed by the height difference between the two side floats, and the width of the control is Like the prior art,
Since it can be greatly increased as compared with that related only to the ascending movement of the floats on both sides, the seedling planting device can be accurately controlled in accordance with the unevenness in the field scene. ． The rolling shaft was placed at a height between the top link and the lower link without being positioned at substantially the same height as the lower link, while the floats on both sides were located on the left and right outer sides of the seedling planting device. As a result, the distance from the rolling axis to the floats on both sides becomes long, and when the floats on both sides move up and down by a certain height, the seedling planting device is moved in parallel with the field scene following this. The rotation angle when rolling up to is smaller than that in the case of the above-mentioned prior art, so sensitivity in the case of performing rolling control so as to eliminate the height difference according to the height difference between the both side floats described above. Can be greatly improved. ． On the traveling machine body side, a rolling control shaft adapted to reciprocate in a direction substantially perpendicular to the axis of the rolling shaft by forward and reverse rotation of a motor attached thereto is provided, and the seedling planting device is provided on the rolling control shaft. By adopting a configuration in which the seedling planting device rolls relative to the traveling machine body by the reciprocating motion of the rolling control shaft, the configuration of rolling control of the seedling planting device by the motor becomes simple, and the weight is reduced. It is possible to avoid the increase and the increase in size. It has the function and effect.

[Brief description of drawings]

FIG. 1 is a side view of a riding-type rice transplanter.

FIG. 2 is a plan view of FIG.

FIG. 3 is an enlarged sectional view taken along line III-III of FIG.

FIG. 4 is an enlarged sectional view taken along line IV-IV of FIG.

FIG. 5 is a vertical sectional front view of a connecting portion between the traveling machine body and the seedling planting device.

6 is a sectional view taken along line VI-VI of FIG.

7 is a sectional view taken along line VII-VII of FIG.

8 is a sectional view taken along line VIII-VIII of FIG.

FIG. 9 is a diagram showing a relationship between a rolling sensor arm and a limit switch.

[Explanation of symbols]

 1 Traveling Aircraft 9 Seedling Planting Device 12a, 12b Side Float 42 Rolling Control Axis 48 Rolling Control Motor 49 Rolling Sensor Arm 53a, 53b Limit Switch 40a, 40b Wire

Claims (1)

[Claims] 1. A seedling planting device having at least a pair of left and right side floats at the rear ends of a top link and a lower link extending rearward from the traveling machine body, which can be rolled around a rolling shaft extending in the front-rear direction of the traveling machine body. In the rice transplanter, the pair of left and right side floats are configured to freely move up and down independently of the seedling planting device, while the motor attached to the traveling machine body side. Is provided with a rolling control shaft that reciprocates in a direction substantially perpendicular to the axis of the rolling shaft by the forward and reverse rotations, and the seedling planting device is mounted on the rolling control shaft. While the device is related to rolling motion with respect to the traveling body, a motor for reciprocating the rolling control shaft is connected to the both side flow parts.
The height difference is eliminated according to the height difference between the two
Means for rotating in the forward and reverse directions in the same direction, and further, the rolling shaft is arranged at a position at a height between the top link and the lower link, and the both side floats are used for seedling planting. A rolling posture control device in a rice transplanter, which is located on the left and right sides of the device.