JPH05260824A - Rolling attitude control unit in rice transplanter - Google Patents

Abstract

PURPOSE:To provide the subject control unit designed to properly accomplish the rolling control of a seedling planting device relatively to a traveling machine body and also to accomplish proper rolling control in accordance with the situation of the hardness (softness) of the farm ground. CONSTITUTION:A traveling machine body 1 side is equipped with a motor 48 to make rolling motions of a seedling planting device 9, and this motor 48 and both side floats 12a, 12b are connected via an interlocking mechanism ensuring the motor to be actuated so as to make rolling motion of the device in such a direction as to remove the height difference between the floats according to the degree of such height difference, and the interlocking mechanism is equipped with a regulating means designed to vary the above-mentioned height difference to be transmitted to the motor 48.

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 equipped with
It is often the case that a plurality of seedling planting mechanisms are installed in parallel 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 body. In this case, the depth of planting seedlings in the left and right positions of the seedling planting device must be constant.

However, the field scene where the float contacts the ground and the cultivator where the wheels of the traveling machine body contact the ground have unevenness, and the field scene and the cultivator are not always parallel. It will be rolling motion with respect to the field scene. When the seedling planting device rolls in this manner with respect to the field scene, 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 locations where the planting depth was deep, and floating seedlings occurred at locations where the planting depth was shallow.

[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 about 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 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. It is suggested to keep it constant.

[0005]

However, according to the prior art, the seedling planting device rolls 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 accurately 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.

It is an object of the present invention to solve this problem and to provide a rolling posture control device capable of realizing an accurate rolling control according to a hard and soft situation in a field.

[0007]

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 mounted so as to be rotatable around a rolling shaft extending in the front-rear direction of the traveling machine body, the pair of left and right side floats are configured to freely move up and down independently of the seedling planting device. On the other hand, on the traveling machine body side, a motor for rolling the seedling planting device with respect to the traveling machine body is provided, and the motor and the both side floats are provided in a height difference between both side floats. Accordingly, the motor is operated via an interlocking mechanism that operates so as to cause the seedling planting device to roll in such a direction as to eliminate the height difference between the floats on both sides. And, further, it has a configuration in which the interlocking mechanism is provided with adjusting means adapted to increase or decrease the height difference of the both side portions float for transmitting to the motor.

[0008]

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 attached to 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 indicates 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 at appropriate intervals from the transmission case 10, and a pair of left and right side floats 12a and 12b mounted on the lower surface of each planting case 11,
It comprises a central float 13 and a seedling stand 14 whose upper end is inclined so as to approach the traveling body 1, and a vertical swinging type seedling planting mechanism 15 is provided 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 one top link 17 are pivotably attached to the upper rear portion, respectively.
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 top pin shaft 19 has the tip of the top link 17 pivotally attached thereto, and the lower pin shaft 20 has the tips of both lower links 16 pivotably attached thereto, and both 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 machine body 1 has a rolling shaft at a position on the plane center line of the traveling machine body 1. A bracket plate 23 provided 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
Hitch body 25 formed in a U-shape in a plane so as to be inserted between the joint plates 18 on the rolling shaft 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, a 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, and both side plates 26 The hitch shaft 29 between the eccentric cam 31
A hook lever 32 hooked on the lower hitch pin 22 is rotatably fitted to the eccentric cams 31, and both hook levers 32 can be rotated simultaneously through a pipe 33. Connect, one hook lever 3
Between the pin 34 projecting outward from one end of 2 and the pin 35 projecting outward from the lever handle 30, both hook levers when the lever handle 30 is rotated toward the seedling planting device 9 side. A spring 36 is mounted to bias the lower hitch pin 22 toward the lower hitch pin 22.

The floats 12a and 12b on both sides are also provided.
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 has one end of each wire 40a, 40b for each side float 12a,
12b By the upward movement of the front part, both wires 40a, 4
Tie each so that 0b can be pulled.

A rolling control shaft 42 extending in a direction perpendicular to the traveling direction is axially slidably supported by a gear case 41 attached to the hitch body 25 on the traveling machine body 1 side so as to be slidable in the axial direction. Two protrusions 43a and 43b are fixed to the shaft 42, and both protrusions 43a and 43b are fixed.
Between the bracket plate 23 on the side of the seedling planting device 9
Insert the protruding piece 44 that integrally protrudes from the
Rolling control springs 45a and 45b are respectively inserted between 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 body 1. To configure.

Further, 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 to the right, the rolling control shaft 42 slides to the left as indicated by the arrow A and rotates to the left. The rolling control shaft 42 is configured to slide rightward as indicated by arrow B.

On the other hand, a pin 50 is rotatably attached to the base end of a rolling sensor arm 49 on the traveling machine body 1 or the seedling planting device 9 and is slidable in a long slot 51 formed in the rolling sensor arm 49. The wire 52 connected to the both side floats 12a and 12b is connected to the engaging element 52 fitted to the
When the wire 40b of the right side float 12b is pulled, the rolling sensor arm 49 pivots to the right when the springs 57a and 57b at the other ends of a and 40b are pulled, and when the wire 40a of the left side float 12a is pulled, the rolling sensor arm 49 is rotated. The sensor arm 49 is engaged 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 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 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.
8 inserts the screw gear 47 so as to drive-rotate the screw gear 47 in the direction of clockwise rotation.

Further, the rolling sensor arm 49
The bracket 58 that supports the pivot pin 50 is attached to the traveling machine body 1 or the seedling planting device 9 so as to be movable in the longitudinal direction of the rolling sensor arm 49. The reference numerals 56a and 56b denote springs for restoring the rolling.
The spring forces of a and 56b are the same as those of the rolling control spring 4.
It is smaller than the spring force of 5a and 45b.

In this structure, the seedling planting device 9 is used in the field scene 5.
When the rolling motion does not occur 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, neither of the two side floats 12a and 12b moves upward. The rolling sensor arm 49 interlocking 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 inclined 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 elevation, the rolling sensor arm 49 is pulled leftward by the wire 40a by the ascending movement of the left side float 12a, while the descending movement of the right side float 12b causes the wire 40b to move 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 rightward as shown by an arrow B in FIG. 8, so that the inclination of the seedling planting device 9 to the left is corrected.

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 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 an 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 between the seedling planting device 9 and the field scene 55 at the left and right positions 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. Moreover, in this case, the bracket 58 that supports the pivot pin 50 in the rolling sensor arm 49 is attached to the traveling machine body 1 or the seedling planting device 9 so as to be movable in the longitudinal direction of the rolling sensor arm 49. When the bracket 58 is moved upward in FIG. 9, the rotation angle of the rolling sensor arm 49 becomes small due to the height difference between the two side floats 12a and 12b, and the sensitivity of the rolling control becomes insensitive. On the other hand, when the bracket 58 is moved downward in FIG. 9, the rotation angle of the rolling sensor arm 49 becomes large due to the difference in height between the floats 12a and 12b on both sides.
Since the sensitivity of the rolling control becomes sensitive, it can be applied when the field scene 55 is soft.

[0021]

According to the present invention, the rolling control motor for rolling the seedling planting device with respect to the traveling machine body as described above is provided with respect to the floats on both sides and the difference in height difference between the floats on both sides. According to the above, the motor is configured so as to operate so as to cause the seedling planting device to roll so as to eliminate the height difference between the two side floats. The rolling control can be performed by the vertical movement of both side floats, and the width of the control can be greatly increased as compared with the prior art related to only the upward movement of both side floats. The device can be precisely controlled for rolling according to the unevenness in the field scene.

In addition, according to the present invention, since the interlocking mechanism is provided with the adjusting means for increasing and decreasing the height difference of the floats on both sides transmitted to the motor, the sensitivity of the rolling control can be freely adjusted. The effect is that accurate rolling control can be realized according to the conditions of hard and soft in.

[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.

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 Plant 24 Rolling Shafts 12a, 12b Side Float 42 Rolling Control Shaft 48 Rolling Control Motor 49 Rolling Sensor Arm 53a, 53b Limit Switch 40a, 40b Wire 58 Bracket

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 left and right side floats are configured to move up and down independently with respect to the seedling planting device, while the traveling machine body is provided with On the other hand, a motor for rolling the seedling planting device is provided, and the motor and the both side floats are connected to each other by the motor depending on the height difference between the two side floats. Both sides that are related to each other via a linkage mechanism that is operated so as to make a rolling motion in a direction that eliminates the height difference between the two, and that are further transmitted to the motor to the linkage mechanism. Rolling attitude control system in rice transplanter, characterized in that a regulating means adapted to increase or decrease the height difference of the float.