JPH063B2 - Surface soil leveling mechanism of powder and grain feeding device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a topsoil leveling mechanism of a seeding device (powder and granule feeding device) for direct seeding in a paddy field, for example.

[Conventional technology]

In this type of sowing device, the sowing depth has a significant effect on the subsequent germination and growth of seeds.Therefore, like the rice transplanter, the bottom side of the machine senses ground pressure fluctuations and moves the machine up and down. Equipped with a float to be controlled, seeds are sown in a sowing groove formed by a grooving device, and the seeding ditch sown by a soil cover plate provided at the rear of the grooving device is used to level the soil.

[Problems to be Solved by the Invention]

By the way, the float has a sensitivity adjusting mechanism that adjusts the ground pressure sensitivity because the ground pressure sensitivity changes depending on the hardness of the cultivated soil in the field, but the soil cover plate is only fixed in a fixed state, and the hardness of the cultivated soil is changed. No measures were taken to respond. For this reason, when working on a place where cultivated soil is highly undulated, such as a headland, there is a problem that the soil covering plate does not sufficiently level the soil and the work accuracy deteriorates.

Therefore, the present invention intends to provide a surface soil leveling mechanism that adjusts the soil leveling pressure of the soil cover plate in conjunction with the sensitivity adjustment of the float to enable soil leveling that is suitable for the hardness of the cultivated soil. is there.

[Means for Solving the Problems]

To this end, the present invention provides a float that senses ground pressure fluctuations to control the vertical movement of the machine body, a sensitivity adjustment mechanism that adjusts the ground pressure sensitivity of the float, and a groove-forming mechanism that forms a powder or granular material feeding groove. And a leveling mechanism provided behind the grooving mechanism for leveling the soil of the powdery material feeding groove, and configured to adjust the pressing force of the leveling mechanism in conjunction with the adjustment of the sensitivity adjusting mechanism. It will be done.

[Action]

Based on the above configuration, the present invention adjusts the pressing force of the leveling mechanism in conjunction with the adjustment of the sensitivity adjustment mechanism, so that the granular material feeding depth and the covering soil leveling work for the fed granular material are performed. It is done properly.

〔Example〕

 The present invention will be described below with reference to the illustrated embodiments.

In the first embodiment of the present invention shown in FIG. 1 and FIG. 2, reference numeral 1 is a traveling vehicle body having a pair of left and right front wheels 2 and rear wheels 3. The traveling vehicle body 1 has an engine 4 at a front portion thereof. The seeding device 6 is mounted on the rear part of the plant by way of an elevating link 5 that moves up and down by a telescopic operation of a hydraulic cylinder (not shown).

The seeding device 6 also serves as a transmission case and receives power from the traveling vehicle body 1 side by the belt transmission system 8 to the main body frame 7 connected to the elevating link 5 in a rolling and pitching manner, and the transmission case 9 is provided above the main body frame 7. Is provided. Connection frame 1 extending from the transmission case 9 to the left and right sides
Transmission cases 11 and 11 are connected and supported at the end portions of 0, respectively.

Seed feeding section 1 is provided on each of the left and right sides of transmission cases 9 and 11.
2, 12 are fixed, a seed hopper 13 is attached to the upper part of the seed feeding part 12, and a seed guide tube 14 is attached to the lower part. Body frame 7 to transmission case 9
Power is transmitted to the belt transmission system 15 by the belt transmission system 15, and the rotary shaft 16 of the belt transmission system 15 on the transmission case 9 side extends long left and right to transmit the power to the transmission cases 11 and 11.
Further, power is transmitted from the transmission cases 9 and 11 to the seed feeding section 12.

A support frame 17 is arranged in the front-rear direction below the main body frame 7 and the transmission cases 9 and 11, and a center float 18 serving as a sensor float is provided on the support frame 17.
And the rear part of the side floats 19 and 19 are the brackets 2.
It is pivoted through 0. The front part of the center float 18 has a support arm 2 protruding forward from the body frame 7.
While connecting with 1 by a V-shaped link body,
An oil pressure switching valve 22 is provided on the side of the link body, the oil passage is switched by the vertical movement due to the ground pressure fluctuation of the center float 18, the hydraulic cylinder of the lifting link 5 is expanded and contracted, and the seeding device 6 is connected via the lifting link 5. I try to move it up and down.

A sensitivity adjusting arm 23, the lower end of which is in sliding contact with the upper surface of the center float 18, is pivotally supported on the support arm 21, and an operating rod having an elongated hole 24a and a spring 24b is provided at the upper end of the sensitivity adjusting arm 23. One end of 24 is connected,
The other end side of the operating rod 24 is provided with a sensitivity adjusting lever 27 provided on a side portion of a control seat 26 of the traveling vehicle body 1 via an operating wire 25.
Are linked to. The tip of the side float 19 has a pin 2 provided on the support frame 17 via a long hole link 28.
It is supported by 9 so as to be vertically movable.

Groovers 30 are disposed on both sides of the rear part of the center float 18 and the side floats 19 so as to be supported by the support frame 17 via support members 31, and the lower end of the seed guide tube 14 is provided in the groove 30. Is facing. At the rear end of the support frame 17, a rotary shaft 32 extending in the left-right direction is extended.
The soil-covered flat plate 33 is pivotally supported on the rotary shaft 32 so as to correspond to each grooving device 30.

A pin 34 projects from one side of the soil-covering flat plate 33, and one end side of an operating rod 35 having a long hole 35a and a spring 35b is connected to the pin 34, and the other end side of the operating rod 35 is It is connected to the sensitivity adjusting lever 27 via the operation wire 25a, and the pressing force of the soil covering flat plate 33 is adjusted in conjunction with the sensitivity adjusting operation of the center float 18. The upper end of the covering soil flat plate 33 and the support frame 1
A return spring 36 is provided between the return spring 36 and 7.

In the seeding device having such a structure, when the seeding device is introduced into a flooded paddy field and the seeding operation is performed, the seeding device 6 is lowered by the elevating link 5 to bring the floats 18 and 19 into contact with the paddy field, and the traveling vehicle body 1 travels along the paddy field. The seed feeding part 12 in the seeding groove formed by the grooving device 30 on the smoothed rice field.
The seeds of rice fed out from the plant are dropped through the seed guide pipe 14, and the top soil is covered and leveled by the cover soil leveling plate 33.

At the time of this sowing work, the front part of the center float 18 moves up and down due to the change in the ground pressure with the rice field, and this up / down motion switches the hydraulic switching valve 22 to move the sowing device 6 up and down via the elevating link 5. The seeding work is carried out at a substantially constant seeding depth while keeping the ground pressure of the float 18 substantially constant.

The topsoil in the field has hardness and softness, and the variation in the ground contact pressure of the center float 18 causes a difference due to the hardness and softness. Therefore, the sensitivity is adjusted by the lever 27. For example, when the cultivated soil is hard, by rotating the sensitivity adjusting lever 27 so that the sensitivity adjusting arm 23 presses the center float 18 with a strong force, the operating rod 24 is pulled through the operating wire 25 and the float 18 is moved. The vertical movement sensitivity becomes dull, at which time the operating wire 25a is also interlocked and the operating rod 35 is pulled, and the pressing force of the covering soil flat plate 33 against the rice field becomes strong. When the cultivated soil is soft, the operation wires 25, 25
Since a is loosened, the pressing force of the sensitivity adjusting arm 23 against the float 18 becomes weak, the vertical movement sensitivity of the float 18 becomes sensitive, and the pressing force of the soil covering flat plate 33 becomes weak.

Therefore, when the cultivated soil is hard, the cover soil is leveled with a strong force, so that the leveling of the hard soil during normal sowing can be easily performed, and the leveling of the cover soil in a place where the topsoil is highly undulating can be performed easily. Good flatness. When the cultivated soil is soft, it is possible to work sufficiently even if the soil is leveled with a weak force.

In the second embodiment of the present invention shown in FIGS. 3 and 4, the center float 18 in the first embodiment is used.
The manual adjustment of vertical movement sensitivity was done, but all manual operation mechanisms were abolished and this was automated.

That is, the center float 18 and the side float 19
At the tip of the, the base is held by the tip of the float, and a cultivated soil softness sensor 37 is provided, in which the rotation range is automatically changed by the hardness (softness) of the cultivated soil. The sensor 37 has an upper end and a grooving groove. A link rod 39 connects the rotating shaft 38 pivotally supported between the devices 30 and 30. A soil covering flat plate 33a is attached to the rotating shaft 38 via a support arm 40, and is arranged behind the grooving device 30.

In the sowing apparatus of the second embodiment having such a configuration, the hardness of the cultivated soil is detected by the movement resistance of the sensor 37,
The rotation shaft 38 is rotated by the rotation of the sensor 37 via the link rod 39, and the pressing force of the covering soil flat plate 33a on the top soil is automatically adjusted, and the pressing force of the covering soil flat plate 33a is adjusted according to the hardness of the cultivated soil. Is automatically adjusted to properly cover the soil in the sowing ditches.

In addition, although the said Example demonstrated applying this invention to the riding type seeding apparatus, this invention can be implemented also in a walk type, and the said seeding apparatus 6 can be used, for example, as a granular fertilizer. A fertilizer applicator that delivers the same can be similarly implemented.

〔The invention's effect〕

As described above, according to the surface soil leveling mechanism of the powder and granular material feeding device of the present invention, the ground pressure sensitivity adjustment of the float that senses the ground pressure variation and controls the vertical movement of the machine body, and the powder and granular materials are fed. Since the adjustment of the pressing force of the leveling mechanism for leveling the soil with the soil can be performed in conjunction with it, the sensitivity of vertical movement of the float is set appropriately according to the hardness of the field, and it is also suitable for the hardness of the cultivated soil. It is possible to carry out the soil covering leveling with a certain pressing force, and to simultaneously perform the powder and granular material feeding work and the soil covering leveling work with high working accuracy.

[Brief description of drawings]

FIG. 1 is a side view of the entire riding-type seeding device showing a first embodiment of the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is a second view of the present invention.
FIG. 4 is a side view of the riding type seeding device as a whole, and FIG. 4 is a plan view of the same. 1 ... Running car body, 2 ... Front wheel, 3 ... Rear wheel, 4 ... Engine, 5
... Lifting link, 6 ... Seeding device, 7 ... Main body frame, 8,
15 ... Belt transmission system, 9, 11 ... Transmission case, 10 ... Connection frame, 12 ... Seed feeding section, 13 ... Seed hopper,
14 ... Seed guide tube, 16 ... Rotating shaft, 17 ... Support frame, 18 ... Center float, 19 ... Side float,
20 ... Bracket, 21, 40 ... Support arm, 22 ... Hydraulic pressure switching valve, 23 ... Sensitivity adjusting arm, 24, 35 ... Operating rod, 24a, 35a ... Oblong hole, 24b, 35b ... Spring,
25, 25a ... Operation wire, 26 ... Steering seat, 27 ... Sensitivity adjusting lever, 28 ... Long hole link, 29, 34 ... Pin,
30 ... Grooving device, 31 ... Support member, 32, 38 ... Rotating shaft,
33, 33a ... Flat soil-covered flat plate, 36 ... Return spring, 37 ... Plow soil hardness sensor, 39 ... Link rod.

Claims (2)

[Claims] 1. A float that senses fluctuations in ground pressure to control the vertical movement of the machine body, a sensitivity adjusting mechanism that adjusts the ground pressure sensitivity of the float, and a grooving mechanism that forms a powdery particle feeding groove.
It is provided behind the grooving mechanism, and is provided with a leveling mechanism for leveling the powder and granular material feeding groove with soil, and is configured to adjust the pressing force of the leveling mechanism in conjunction with the adjustment of the sensitivity adjusting mechanism. Surface soil leveling mechanism of the powder and granular material feeding device. 2. The surface soil leveling mechanism of the powder and granular material feeding device according to claim 1, wherein the sensitivity adjusting mechanism is an automatic sensitivity adjusting mechanism for automatically detecting the hardness of the topsoil and automatically adjusting the sensitivity.