JPH0452088B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a topsoil leveling device used in a seeding device for direct sowing of rice by flooding rice fields.

[Conventional technology]

Conventionally, in this type of seeding device, the sowing depth has a large effect on the subsequent germination and growth of seeds, and ultimately the yield, so similar to rice transplanters, there is a device on the underside of the machine that senses ground pressure fluctuations. Equipped with a float that controls the vertical movement of the machine, the seeding depth is kept almost constant.

[Problem to be solved by the invention]

However, in the above-mentioned conventional seeding apparatus, sufficient consideration has not been given to backfilling and covering the seeding groove with topsoil after seeding. The present invention was conceived in view of the above circumstances, and is a seeding device that maintains the seeding depth at a constant level by keeping the depth of the seeding groove constant, and accurately performs soil filling and leveling of the seeding groove. The purpose is to provide a topsoil leveling device.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a float that senses ground pressure fluctuations to control the vertical movement of the aircraft, a sensitivity adjustment mechanism that adjusts the ground pressure sensitivity of this float, and a groove forming mechanism that forms a seeding groove. , a mulching mechanism that backfills the topsoil into the seeding groove where the seeds have been sown, and a soil covering and leveling mechanism that covers and levels the soil in the seeding groove where the seeds have been sown, and the seeding groove of the mulching mechanism works in conjunction with the adjustment of the sensitivity adjustment mechanism. The device is characterized in that the relative position with respect to the device is adjusted.

[Effect]

With the above configuration, in the topsoil leveling device in the seeding device of the present invention, the relative position of the mulching mechanism with respect to the seeding groove is adjusted in conjunction with the adjustment of the sensitivity adjustment mechanism,
By keeping the depth of the seeding groove constant, the seeding depth can be maintained constant, and the soil filling and covering of the seeding groove can be accurately performed.

【Example】

The invention will now be described with reference to the illustrated embodiments. In the first embodiment of the present invention shown in FIGS. 1 and 2, reference numeral 1 denotes a running vehicle body having a pair of left and right front wheels 2 and rear wheels 3, and this running vehicle body 1 includes an engine 4 in the front part. A seeding device 6 is mounted at the rear via an elevating link 5 that moves up and down by the expansion and contraction operation of a hydraulic cylinder (not shown). The seeding device 6 receives power from the traveling vehicle body 1 side through a belt transmission system 8 to a main body frame 7 which also serves as a transmission case and is connected to the lifting link 5 in a rolling and pitching manner. has been established. At the ends of the connection frame 10 extending from the transmission case 9 to both left and right sides,
Transmission cases 11, 11 are connected and supported, respectively. Seed dispensing parts 12, 12 are fixed to the left and right sides of the transmission cases 9, 11, and a seed hopper 13 is attached to the upper part of the seed dispensing part 12, and a seed guide tube 14 is attached to the lower part of the seed dispensing part 12, respectively. Belt transmission system 15 from main body frame 7 to transmission case 9
The rotating shaft 16 of the belt transmission system 15 on the transmission case 9 side extends long left and right, and transmits the power to the transmission cases 11, 11. Further, power is transmitted from the transmission cases 9 and 11 to the seed feeding section 12. A support frame 17 is disposed in the front-rear direction at the bottom of the main body frame 7 and the transmission cases 9, 11.
A center float 18 serving as a sensor float and side floats 19, 1 are attached to this support frame 17.
9 is pivotally supported via a bracket 20. The front part of the center float 18 is connected to a support arm 21 protruding forward from the main body frame 7 by a dogleg-shaped link body, and a hydraulic switching valve 22 is provided on the side of the link body.
The oil passage is switched by the vertical movement of the center float 18 due to ground pressure fluctuations, and the hydraulic cylinder of the lifting link 5 is expanded and contracted to move the seeding device 6 up and down via the lifting link 5. Further, a sensitivity adjustment arm 23 whose lower end is in sliding contact with the upper surface of the center float 18 is pivotally supported on the support arm 21 by a pin 24, and an operation wire 2 is connected to the upper end of the sensitivity adjustment arm 23 via a spring.
One end of the operating wire 26 is connected to the other end of the operating wire 26.
It is connected to a sensitivity adjustment lever 28 provided on the side of the driver's seat 27 of the traveling vehicle body 1. The tip of the side float 19 is supported by the support frame 17 via an elongated link 29 so as to be movable up and down. Center float 18 and side float 1
A groove cutter 30 is disposed on both rear sides of the groove 9 and is supported by the support frame 17 via a support member 31.
The lower end of the seed guide tube 14 is exposed inside the groove cutter 30. Also, both floats 18, 19,
On both sides of the rear end portion of
An operating wire 26a is connected between the bulwark plate 32 and the sensitivity adjustment lever 28. A return spring 34 is provided between the earthing plates 32, 32. In a seeding device with such a configuration, when it is introduced into a flooded paddy field to perform seeding work, the lifting link 5
The seeding device 6 is lowered by the floats 18 and 1.
9 is in contact with the rice field surface, and as the traveling vehicle body 1 runs, it slides on the rice field surface, and the rice seeds fed out from the seed feeding section 12 are transferred to the seeding groove formed by the furrower 30 on the leveled rice field surface through the seed guiding tube 14. The topsoil falls through the soil, and is covered with topsoil by the earth mopping board 32. During this seeding work, the front part of the center float 18 moves up and down due to changes in the ground pressure with the field surface, and this up and down movement switches the hydraulic switching valve 22 to operate the seeding device 6 via the lifting link 5. By moving the float 18 up and down and keeping the ground pressure of the float 18 substantially constant, seeding work is performed at a substantially constant seeding depth. The topsoil of a field has hardness and softness, and this hardness causes a difference in ground pressure fluctuation of the center float 18, so the sensitivity is adjusted by the lever 28. For example, when the soil is hard, the sensitivity adjustment arm 2
By rotating the sensitivity adjustment lever 28 so as to push out the center float 18 with a strong force, the arm 23 is pulled via the operating wire 26, and the vertical movement sensitivity of the float 18 becomes dull. 26a is also pulled at the same time, and the mulch plate 32 is pulled, and the mulch plate 32 is moved largely toward the trencher 30 side, and the topsoil is largely gathered. When the topsoil is soft, the operating wires 26 and 26a are loosened, and the pressing force of the sensitivity adjustment arm 23 against the float 18 is weakened, making the sensitivity of the vertical movement of the float 18 sensitive, and the The unevenness of the soil also decreases, and the topsoil becomes smaller. Therefore, earth filling is performed according to the depth of the trencher 30. In the second embodiment of the present invention shown in FIGS. 3 and 4, a rotation shaft 36 is provided at the rear end of the support frame 17, located behind the earthen board 32 in the first embodiment. A covering soil leveling plate 35 is provided through the soil covering plate 35, and the earth bulging plate 32 is connected to this soil covering leveling plate 35 via a spring 37. In the seeding device having such a configuration, the pressing force of the covering soil leveling plate 35 against the topsoil is adjusted at the same time as the operation wire 26a operates the soil bundling plate 32 so that it becomes strong when the topsoil is hard and becomes weak when the topsoil is soft. The pressing force of the covering soil leveling plate 35 is automatically adjusted according to the hardness or softness of the topsoil, so that the seeding trench can be appropriately leveled. Although the above embodiments have been described by applying the present invention to a riding-type seeding device, the present invention can be similarly implemented in a walking-type seeding device.

【Effect of the invention】

As explained above, according to the topsoil leveling device of the seeding device of the present invention, the sowing groove of the mulch mechanism (the mulch plate 32 in the example) is adjusted in conjunction with the adjustment of the sensitivity adjustment mechanism (the sensitivity adjustment lever 28 in the example). Since the relative position between the seeding groove and the top soil can be adjusted, the appropriate amount of soil can be applied to the seeding furrow depending on the hardness or softness of the topsoil, and the soil can be covered to a constant thickness, resulting in highly accurate seeding work. can do.

[Brief explanation of drawings]

FIG. 1 is a side view of the entire riding-type seeding device showing the first embodiment of the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is the entire riding-type seeding device showing the second embodiment of the present invention. FIG. 4 is a plan view of the same. DESCRIPTION OF SYMBOLS 1... Traveling vehicle 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... Support arm, 22... Hydraulic switching valve, 23... Sensitivity adjustment arm, 24... Pin, 25
... Spring, 26, 26a ... Operation wire, 27 ... Control seat, 28 ... Sensitivity adjustment lever, 29 ... Long hole link, 30 ... Groove cutter, 31 ... Supporting member, 32 ... Shoring board, 33 ... Pin, 34 ... Return Spring, 35...Soil covering leveling plate, 36...Rotation shaft, 37...Spring.

Claims (1)

[Claims] 1. A float that senses ground pressure fluctuations to control the vertical movement of the aircraft, a sensitivity adjustment mechanism that adjusts the ground pressure sensitivity of this float, a groove forming mechanism that forms a seeding groove, and a It is equipped with a mulching mechanism that backfills the topsoil into the seeding groove, and a soil covering and leveling mechanism that covers and levels the soil in the seeded seeding groove, and adjusts the relative position of the mulching mechanism with the seeding groove in conjunction with the adjustment of the sensitivity adjustment mechanism described above. A topsoil leveling device for a seeding device, characterized in that it is adjustable.