JPH0120820Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention connects a seedling planting device to the rear of a passenger vehicle body, and connects three soil leveling floats to the seedling planting device in a horizontal direction, and then The seedling planting device is attached to the vehicle body so that it is pivoted so as to be able to swing up and down using the end as a fulcrum, and the vertical position of the central one of the three floats relative to the seedling planting device is maintained within a set range. This invention relates to a rice transplanter equipped with a control mechanism for raising and lowering the rice transplanter.

The above rice transplanter uses three floats to accurately level the field for planting.
The planting depth is maintained constant by automatically raising and lowering the seedling planting device while detecting the height of the seedling planting device relative to the mud by vertically swinging the center one of the floats. The present invention is a rice transplanter having such advantages, and the present invention is a rice transplanter that has three parts, while making it possible to level the ground of the wheel marks and control the elevation as desired through reasonable modification. This is intended to prevent the posture of adjacent already planted seedlings from being unintentionally disturbed by the pressure of muddy water from the floats at both lateral ends.

Embodiments of the present invention will be described in detail below based on the drawings.

As shown in FIGS. 1 and 2, it is equipped with a pair of left and right front wheels 1, 1 that can be driven and rotated and whose direction can be changed, and a pair of left and right rear wheels 2, 2 that can be driven and rotated,
Engine 3 and transmission case 4, driver's seat 5
an inclined seedling platform 6 that moves back and forth horizontally at a constant stroke with four pine-shaped seedlings W placed side by side in the rear of the passenger vehicle body, which is located in front of the vehicle and at the front end of the vehicle; Four planting claws 7 that take out and plant one seedling from the lower end of each pine-shaped seedling W while circulating up and down, and
A seedling planting device 9 equipped with three floats 8 and the like arranged side by side at appropriate intervals in the lateral direction is connected so as to be movable up and down via a pair of upper and lower lift links 10a and 10b,
Furthermore, a hydraulic cylinder 11 for lifting and lowering the seedling planting device
The lower elevating link 10b is provided in such a manner that it can be swung up and down relative to the vehicle body, and four rows of seedlings are sequentially planted as the vehicle advances, and the planting depth is kept constant. In order to achieve this, and to avoid contact of the seedling planting device 9 with the ground when traveling on a headland or on a road, the seedling planting device 9 is configured to be able to be raised and lowered relative to the vehicle body.

Each of the floats 8... is connected to a drive case 12 of the seedling planting device 9 by a link mechanism 13 whose rear end portion is pivoted around the horizontal axis X, and whose front end portion is bendable and extensible. As shown in FIG. 3, a spring 14 biases the center float 8a downward.
is provided so as to act on the link mechanism 13a corresponding to the central float 8a, and the swing operating arm 16 of the control valve 15 that switches the operating state of the hydraulic cylinder 11 and the link mechanism 13a are interlocked and connected by a wire 17. It has been done.

When the swinging position of the float 8a for the seedling planting device is within the appropriate setting range, the control valve 15 is brought into a lifting stop state that stops the operation of the hydraulic cylinder 11, and when the lifting position is out of the appropriate setting range. , when the control valve 15 is operated to extend the hydraulic cylinder 11 to raise the seedling planting device 9, and further falls out of the proper setting range, the control valve 15
is automatically switched to a state in which the hydraulic cylinder 11 is shortened and the seedling planting device 9 is lowered, and the swinging position of the float 8a relative to the seedling planting device is automatically maintained within the set range. The structure is such that the planting depth is stabilized in this way.

In short, the height of the seedling planting device 9 relative to the mud is detected based on the vertical movement of the float 8a, and the seedling planting device 9 is automatically raised and lowered to stabilize the planting depth. be.

Reference numeral 18 in the figure is a manual lift lever that locks and swings the control valve 15, which is biased by the float 8a during the downward operation, by the locking arm 19 during the upward operation. It is configured to be switchable between position U, lifting stop position N, lowering position D, and position A in which the control valve 15 is made freely operable and is automatically operated by the float 8a as described above.

The floats 8, 8 at both lateral ends of the three floats 8, 8, 8a are attached to a pair of left and right rear wheels 2, 2 of the passenger vehicle body.
and both floats 8,
When viewed from above, the large width portion S for leveling the ground at the front end of No. 8 is shaped like a straight line along the longitudinal direction of the fuselage, with its lateral inner surface inclined toward the inside of the fuselage toward the rear. The floats 8, 8 at both lateral ends are configured to suppress as much as possible the pushing of muddy water toward the outside of the aircraft as the aircraft advances. Furthermore, the center float 8a is provided with its front end projecting further forward than the floats 8, 8 at both lateral ends, so that the floats 8, 8 at both lateral ends The muddy water pressed against the walls,
This prevents the fluid from flowing to the front part of the central float 8a.

In short, the floats 8, 8 at both lateral ends suppress muddy water from being pushed toward the lateral outside of the aircraft and disturb the posture of the adjacent already planted seedlings, and the floats 8a at the center
The floats 8, 8 at both lateral ends are used to prevent the machine from swinging unexpectedly due to muddy water being pushed inward of the machine, thereby ensuring accurate elevation control.

As shown in FIG. 4, the support case portion 12a of the planting claw 7 is configured to be expandable and contractable back and forth, and its vertical position can be adjusted by the elongated hole 20 with respect to the main body portion of the drive case 12. Furthermore, the claw operating rotation shaft 21 of the support case portion 12a and the drive rotation shaft 22 of the drive case 12 are provided in a state where they can be attached.
are interlocked and connected via an extendable and bendable transmission shaft 23 and a bevel gear interlocking mechanism, and the position of the planting claw 7 relative to the seedling stand 6 can be adjusted to adjust the amount of seedlings taken out or to adjust the amount of pine-shaped seedlings W. In order to be able to take out seedlings in a predetermined manner regardless of variations in the thickness of the bed soil, the structure is such that the position can be adjusted forward and backward and up and down.

In carrying out the present invention, various types of seedling planting device 9 can be used, such as a device that plants pot-shaped seedlings grown individually one by one.

In summary, the present invention, in the rice transplanter mentioned above,
Of the three floats 8, 8, 8a, the floats 8, 8 at both lateral ends are disposed at rear positions of the pair of left and right rear wheels 2, 2 of the passenger vehicle body, and both floats 8, When viewed from above, the large width portion S for leveling the ground at the front end of No. 8 is shaped like a straight line along the longitudinal direction of the fuselage, with its lateral inner surface inclined toward the inside of the fuselage toward the rear. It is further characterized in that the center float 8a is provided with its front end protruding more forward than the floats 8, 8 at both lateral ends.

That is, since the three floats 8 at both side ends are arranged at the rear of the pair of left and right rear wheels of the passenger vehicle body, the mud surface where the wheels are left can be leveled well and the wheels It is possible to suppress the growth of weeds on the muddy surface of the ruins. Then, in a plan view, the front end wide width portions S, S of both lateral ends of the three floats 8... The floats 8, 8 at both lateral ends move muddy water toward the lateral outside of the aircraft as the aircraft advances. Since the pressure on the ground is suppressed as much as possible, as is commonly done in the past, the lateral outer surface of the large width portions S, S for leveling of the floats 8, 8 at both lateral ends can be pushed backwards towards the rear of the float 8, 8. The floats 8, 8 at both lateral ends are different from those formed in an inclined shape located on the outer side.
This makes it possible to suppress as much as possible the posture of adjacent planted seedlings from being unintentionally disturbed by the pressure of muddy water.Furthermore, according to the present invention, while obtaining the above advantages, the central float 8a is By providing the front end projecting further forward than the floats 8, 8 at both lateral ends, the front end of the central float 8a can be kept in line with the front ends of the floats 8, 8 at both lateral ends. The disadvantage of locating them at the same position in the front and back direction or further aft is that the muddy water that is pushed inside the fuselage by the floats 8, 8 at both lateral ends moves to a position in front of the central float 8a. Since the inconvenience of the central float 8a unexpectedly swinging up and down due to the muddy water is suppressed as much as possible, the elevation control can be performed accurately as desired, and furthermore, the central float 8a The muddy water that is pushed out to the lateral side of the fuselage is caught by the inclined surfaces on the inner side of the front ends of both side floats 8, 8, suppressing it from flowing to the lateral and lateral sides of the fuselage, and suppressing the posture disturbance of adjacent already planted seedlings. However, we have finally achieved a rice transplanter that can be used even better overall.

[Brief explanation of the drawing]

The drawings show an embodiment of the rice transplanter according to the present invention, with Fig. 1 being a side view of the riding type rice transplanter, Fig. 2 being a partially cutaway schematic plan view of the machine, and Fig. 3 showing the relationship between the float and the control valve. FIG. 4 is a cutaway side view of the planting nail attachment part. 2, 2... Rear wheel, 8, 8, 8a... Float,
9...Seedling planting device, S...Large width part for land leveling.

Claims (1)

[Scope of utility model registration request] A seedling planting device 9 is connected to the rear of the passenger vehicle body, and three land leveling floats 8,
The floats 8, 8a are mounted in a state in which they are arranged in a horizontal direction and are pivotally supported so as to be able to swing up and down using their rear ends as a fulcrum. The rice transplanter is equipped with a control mechanism for raising and lowering the seedling planting device 9 with respect to the vehicle body so as to maintain the vertical position of the seedling planting device within a set range, and the rice transplanting machine is provided with a control mechanism for raising and lowering the seedling planting device 9 with respect to the vehicle body, and the three floats 8, 8, 8a The floats 8, 8 at both lateral ends of the floats 8, 8 are disposed at rear positions of the pair of left and right rear wheels 2, 2 of the passenger vehicle body, and the front ends of both floats 8, 8 are provided with a large width for leveling the ground. Part S
In plan view, the lateral outer surface is formed in a straight line along the longitudinal direction of the fuselage, and the lateral inner surface is inclined toward the inner side of the fuselage toward the rear so that the tip part is triangular, and furthermore, the center float 8a is , a rice transplanter characterized in that its front end is provided in a state in which it projects further forward than the floats 8, 8 at both lateral ends.