JPH0418329Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a direct sowing machine in flooded soil, and is intended to uniformly cover soil to improve germination and seedling establishment after sowing.

(Prior Art) There is a direct sowing machine in flooded soil in which a float is equipped with a trencher and a soil covering member, and paddy is sown in the trench made by the trencher, and then the rice is covered with the soil covering member.

Conventionally, this type of riding-type direct seeding machine is based on soil conditions (soil quality, plowing depth, levelness, amount of water retention, soft soil).
Due to the above, the operator constantly controls the ground pressure of the float by operating a lever at hand, and also controls the soil covering depending on the softness of the soil.

Furthermore, in the case of sowing in multiple rows at the same time, the soil conditions may not be constant for each row, but sowing is done according to the conditions of any one of the rows.

(Problems that the invention attempts to solve) Therefore, since it requires constant control, it has the disadvantage of complicating the work, and at the same time, it is not possible to cover each row with soil uniformly, and germination occurs due to variations in the covering soil. This was a cause of defects and uneven seedlings.

(Means for Solving the Problems) The present invention has been provided for the purpose of solving such conventional problems, and as a means for that purpose, a feeding device 9 for feeding out paddy and a rice field. At the same time, the float 10 is provided with a furrower 11 and a soil covering member 12, and paddy is sown in the groove 34 made by the furrower 11 and the soil covering member 12 is provided.
In the direct sowing machine in flooded soil, which covers the soil with soil, an elevating link 18 is attached to the machine frame 7 supporting the feeding device 9 via a parallel link mechanism 17, and a horizontal common support shaft 21 is attached to this elevating link 18. The float 10 and the soil covering member 12 are pivotally supported through the
An interlocking means 38 is provided which interlocks and connects the parallel link mechanism 17 and the soil covering member 12 so that they move up and down.

(Function) During seeding work, the entire seeding unit 8 is lowered onto the rice field, the float 10 is placed in the field, and the mobile machine 1
The vehicle moves forward. Then, the groove 34 is made with the groove cutter 11.
is formed, the paddy 35 fed out from the feeding device 9 falls into the groove 34, and then the soil covering member 12 covers the soil from the left and right.

In this case, when the adjustment lever 27 is operated according to the field conditions, the coil spring 29 is compressed and the ground pressure of the float 10 suitable for the soil is set, and the float 1
0 slides on the rice field under the ground pressure. On the other hand, the amount of protrusion of the soil covering member 12 from the lower surface of the float 10 is also approximately constant, and a predetermined amount of soil covering is obtained.

When the float 10 passes through a locally hard part, the float 10 is pushed up and rises as shown in FIG. That is, the coil spring 29 is compressed from the float 10 via the lift link 18 and the parallel link mechanism 17, and the float 10 rises against the spring 29 as shown by the imaginary line in FIG. As a result, the soil covering member 12 is interlocked and operated around the support shaft 21 via the rod 37 of the interlocking means 38, and the soil covering member 12 is raised or lowered in the same direction as the float 10 or in the opposite direction.

Therefore, for soft ground, if the float 10 and the soil covering member 12 are raised and lowered in the same direction, uniform soil covering can be achieved without being affected by the raising and lowering of the float 10. In addition, for hard soil, if both of them are raised and lowered in the opposite direction, the float 10 of the soil covering member 12
Since the amount of protrusion from the soil increases when the soil is hard,
Gather enough soil to cover it evenly.

If there are fine undulations on the rice field, the float 10 swings around the support shaft 21 and presses against them as it passes. At this time, even if the float 10 swings, the soil covering member 12 does not move up and down.

(Embodiment) The present invention will be described in detail below with reference to the illustrated embodiment. In FIG. 3, 1 is a passenger-type mobile aircraft,
It has a front wheel 2, a rear wheel 3, a handle 4, a seat 5, etc. A machine frame 7 is attached to the rear of the mobile body 1 via a parallel link type attachment mechanism 6, and the attachment mechanism 6
can be raised and lowered by a hydraulic cylinder (not shown).

The machine frame 7 is configured to be long in the lateral direction, and a plurality of seeding units 8 for a plurality of rows are attached at equal intervals in the lateral direction. Each seeding unit 8 includes a feeding device 9, a float 10, a furrower 11, a soil covering member 12, and the like.

The feeding device 9 includes a paddy tank 13 and a feeding roll 14.
and a seeding chute 15, and a feeding roll 14.
The structure is such that the paddy in the paddy tank 13 is fed out in fixed quantities and dropped downward from the sowing chute 15.

As shown in FIGS. 1 and 2, on the machine frame 7, an L-shaped elevating link 18 is pivotally mounted to the lower end of a vertical bracket 16 via a parallel link mechanism 17 so as to be vertically movable. The parallel link mechanism 17 is composed of an upper link 19 and a lower link 20, each of which is a pair of left and right links. Lifting link 18
A bracket 22 on the float 10 is pivotally supported at the rear end via a support shaft 21. A pin 25 is provided on the bracket 23 on the float 10 and fits into a long hole in the elevating link 18. Therefore, the float 10 is movable up and down independently with respect to the machine frame 7 via the elevating link 18 and the parallel link mechanism 17, and the elongated hole 24 is formed around the support shaft 21.
It can be freely oscillated within the range of .

Above each parallel link mechanism 17 is a presser arm 2.
4 are arranged, and each presser arm 24 is fixed to a horizontal shaft 25 inserted into and supported by the bracket 16. Also, among the plurality of presser arms 24,
For example, the center presser arm 24 is connected via a push-pull wire 26 to an adjustment lever 27 arranged on the side of the seat 5 of the mobile body 1, and the float 1
The ground pressure of 0 can be adjusted to suit the hard, medium, or soft soil. A pressing rod 28 is inserted into the presser arm 24, and the pressing rod 2
The lower end of 8 is connected to an upper link 19. A coil spring 29 is fitted onto the pressing rod 28 for urging the float 10 downward. The upper link 19 is also connected via a push-pull wire 30 to a valve 31 that controls the hydraulic cylinder of the mounting mechanism 6, and the upper link 19 senses the vertical movement of the float 10 via the parallel link mechanism 17. 6 to raise and lower the machine frame 7. However, this only applies, for example, to the upper link 19 of the central parallel link mechanism 17.

The furrower 11 is attached to the lower side of the float 10, and a guide 32 for seeding is provided on the rear side of the furrower 11. A notch 33 that opens rearward is formed in the float 10, and the notch 3
A sowing guide 32 is located within 3, and the guide 32
A pair of soil covering members 12 are arranged on both rear sides of the seeding chute 15 and cover the paddy 35 sown in the groove 34 cut by the trencher 11 with soil from the left and right sides. The soil covering member 12 extends forward and upward, and its front end is fixed to both ends of the support shaft 21. In addition, the soil covering member 12 includes a link 36 and a rod 37.
Parallel link mechanism 1 via interlocking means 38 consisting of
7, and when the float 10 moves up and down, it moves up and down around a support shaft 21 in the same direction as the float 10. The soil covering member 12 may be linked to the parallel link mechanism 17 so that it moves up and down about the support shaft 21 in the opposite direction to the float 10 when the float 10 moves up and down.

(Effect of the invention) According to the invention, the machine frame 7 supporting the feeding device 9
An elevating link 18 is attached to the elevating link 18 via a parallel link mechanism 17, and the float 10 and soil covering member 12 are swingably supported on the elevating link 18 via a common horizontal support shaft 21, so that the float 10 can move up and down. Since an interlocking means 38 is provided that interlocks and connects the parallel link mechanism 17 and the soil covering member 12 so that the soil covering member 12 moves up and down when the float 10 moves up and down, the soil covering member 12 moves up and down on the support shaft 21 in conjunction with the vertical movement of the float 10. swaying around,
It is possible to make the amount of soil covered uniform. The float 10 as a whole is movable up and down by the parallel link mechanism 17, and is also swingable around the support shaft 21, so if there are small undulations on the rice field, the float 10
swings around the support shaft 21 and can pass smoothly while pressing against the undulations. In addition, the soil covering member 12 is connected to the interlocking means 3.
Since the float 10 is linked to the parallel link mechanism 17 via the support shaft 21, the soil covering member 12 can be linked to its up and down movement even though the float 10 swings around the support shaft 21. It is not affected by the vibration of 10. Furthermore, float 10
Since the soil covering member 12 is pivotally supported on the elevating link 18 by the common support shaft 21, the structure can be simplified compared to a structure in which the soil covering member 12 is pivotally supported separately.

[Brief explanation of the drawing]

FIG. 1 is a side view of a main part showing an embodiment of the present invention, FIG. 2 is a plan view of the main part, FIG. 3 is a side view of the whole, and FIG. 4 is an explanatory view of the same operation. 1... Mobile aircraft, 9... Seeding unit, 7...
Machine frame, 10... Float, 11... Groove cutter, 12
...Soil covering member, 17...Parallel link mechanism, 29...
...Coil spring, 38...Interlocking means.

Claims (1)

[Scope of utility model registration request] A feeding device 9 that feeds out paddy and a float 1 that slides on the rice field
0, and a groove maker 11 on the float 10.
In the direct sowing machine in flooded soil, the paddy is sown in the groove 34 made by the trencher 11 and the soil is covered with the soil covering member 12. An elevating link 18 is attached via a link mechanism 17, and a float 10 and a soil covering member 12 are swingably supported on this elevating link 18 via a common horizontal support shaft 21, so that the float 10 moves up and down. A direct sowing machine in flooded soil, characterized in that an interlocking means 38 is provided for interlocking and connecting the parallel link mechanism 17 and the soil covering member 12 so that the soil covering member 12 moves up and down.