JPH0771414B2 - 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, in order to simplify the structure, the rolling control of the seedling planting apparatus is performed by the motor instead of the hydraulic cylinder in the past. Although configured, the rolling control shaft that reciprocates by the rotation of the motor is directly connected to the seedling planting device, so that the motor, the rolling control shaft and the connecting portion are Not only the durability is low, but rattling is generated not only because the impact of the rolling movement of the planting device directly acts, but also the push-up force from the field scene to the float in the seedling planting device also acts directly. However, due to this rattling, there is a problem that the control response is lowered.

An object of the present invention is to provide a rolling posture control device which solves these problems.

[0007]

In order to achieve this object, the present invention is to provide a traveling machine body with a seedling planting device having at least a pair of left and right side floats by rolling around a rolling shaft extending in the longitudinal direction of the traveling machine body. In a rice transplanter that is freely mounted, a rolling control shaft is provided on the traveling machine body side so as to reciprocate in a direction substantially perpendicular to the axis of the rolling shaft by forward and reverse rotation of a motor attached to the traveling machine body. The seedling planting device is provided with a projecting piece that projects in a radial direction with respect to a rolling shaft, and a pair of rolling buffers arranged between the projecting piece and the rolling control shaft on both sides of the projecting piece. It is configured to be interlockingly connected via a spring for use.

[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 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,
The center float 13 is further composed of a seedling stand 14 whose upper end is inclined so as to approach the traveling machine body 1, and a vertical rocking type seedling planting mechanism 15 is provided at the rear end of each planting case 11. ing.

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 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 mounted 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, 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
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 are provided when the lever handle 30 is rotated toward the seedling planting device 9 side. 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 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, 4a
Tie each so that 0b can be pulled.

The gear case 41 attached to the hitch body 25 on the traveling machine body 1 side has a rolling control shaft 42 extending in a direction perpendicular to the traveling direction, in other words, a direction perpendicular to the axis of the rolling shaft 24. Is axially slidably supported, and two projections 43a and 43b are fixed to the rolling control shaft 42.
Between b, the bracket plate 23 on the seedling planting device 9 side
A projecting piece 44 which is integrally projected in the radial direction from the above to the rolling shaft 24 is inserted, and rolling buffer springs 45a and 45b are provided between both sides of the projecting piece 44 and the both projections 43a and 43b. The seedling planting device 9 is configured to roll with respect to the traveling machine body 1 by inserting each of them and sliding the rolling control shaft 42.

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 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 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 groove 51 formed in the rolling sensor arm 49. A wire 40 connected to the both side floats 12a and 12b to an engaging element 52 fitted to
When the wire 40b of the right side float 12b is pulled, the rolling sensor arm 49 rotates to the right when the springs 57a and 57b at the other ends of the a and 40b are pulled, and when the wire 40a of the left side float 12a is pulled, the rolling 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 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.

Reference numerals 56a and 56b denote restoring springs for rolling, and the spring forces of the rolling restoring springs 56a and 56b are smaller than the spring forces of the rolling cushioning springs 45a and 45b. In this configuration, when the seedling planting device 9 does not roll with respect to the field scene 55, that is, both the left and right sides of the seedling planting device 9 are in the field scene 55.
Float 1 on both sides when in a predetermined height position with respect to
Since neither of 2a and 12b moves upward, the rolling sensor arm 49 interlocked with the wires 2a and 12b via the respective wires 40a and 40b is in the neutral position where it does not rotate in either the left or right direction, and both limit switches 53a and 53b.
Does not turn on, so the rolling control motor 4
8 is still stopped, and the rolling control by the rolling control motor 48 is not performed. In this case,
When the thrusting force from the field scene 55 acts on the both side floats 12a and 12b, the thrusting force is applied to both the rolling buffer springs 45a interposed between the projecting piece 44 on the bracket 23 side and the rolling control shaft 42. , 45b, it is possible to buffer the thrust force acting on the both side floats 12a, 12b from acting on the rolling control shaft 42 side.

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 to the left 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 toward 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 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 one side and shallow on the other side. During this rolling control, the reciprocating motion of the rolling control shaft 42 by the rotation of the motor 48 is The impact generated when the seedling planting device 9 rolls is transmitted to the side of the seedling planting device 9 through the rolling cushioning springs 45a and 45b.
It can be absorbed by a and 45b.

If the bracket 58 for supporting the pivot pin 50 of 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,
By this movement, the sensitivity of the automatic control can be adjusted.

[0021]

As described above, according to the present invention, the rolling member is reciprocated on the traveling body side in a direction substantially perpendicular to the axis of the rolling shaft by the forward and reverse rotations of the motor attached thereto. While the control shaft is provided, the seedling planting device is provided with a projecting piece that projects in a radial direction with respect to the rolling shaft, and the projecting piece and the rolling control shaft are arranged on both sides of the projecting piece. By interlocking with each other through a pair of rolling buffer springs, the impact when the seedling planting device rolls and the thrust force from the field scene of each float act on the motor and the rolling control shaft. Since it can be absorbed and relaxed by both the rolling buffer springs, the durability can be greatly improved, and further, rattling at the interlocking part can be prevented. Since prevented by a spring, it has an effect of improving the responsiveness of the control.

[Brief description of drawings]

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

FIG. 2 is a plan view of 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]

 DESCRIPTION OF SYMBOLS 1 Traveling machine 9 Seedling planting device 24 Rolling shaft 12a, 12b Side float 42 Rolling control shaft 48 Rolling control motor 44 Projection piece 53a, 53b Limit switch 40a, 40b Wire 45a, 45b Rolling buffer spring

Claims (1)

[Claims] 1. A rice transplanter in which a traveling machine body is equipped with a seedling planting device having at least a pair of left and right side floats so as to be rotatable around a rolling shaft extending in the front-rear direction of the traveling machine body. Is provided with a rolling control shaft reciprocating in a direction substantially perpendicular to the axis of the rolling shaft by forward and reverse rotation of a motor attached thereto, while the seedling planting device has a radius relative to the rolling shaft. A rice planting characterized in that a projecting piece projecting in a direction is provided, and the projecting piece and the rolling control shaft are interlockedly connected via a pair of rolling buffer springs arranged on both sides of the projecting piece. Rolling attitude control device for aircraft.