JPS6251564B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a frame that is supported by a traveling main machine so that it can be driven up and down, and is equipped with a plurality of seeding devices with grounding tools at appropriate intervals in the lateral direction. The flooding mechanism is configured to automatically operate the lifting mechanism so that the ground pressure is maintained within a set range based on ground pressure detection of a grounding tool attached to at least one of the seeding devices. Regarding field seeding machines.

Such a seeding machine for flooded fields maintains the height position of the frame equipped with the seeding device within the set range, regardless of the vertical movement of the running machine due to unevenness of the tiller, and maintains the height of the running machine within the set range. Due to the vertical movement of the machine, the grounding tools in each seeding device may sink unduly below the mud surface, causing the sowing depth to become too deep or too shallow, or the grounding tools may float above the mud surface. In addition, for example, each seeding device can be independently controlled so that its ground pressure is maintained within a set range based on the ground pressure detected by the grounding tools. Compared to automatic lifting, the structure of the lifting/lowering control mechanism for the seeding device is simpler.
In addition, although it is easy to construct at a low cost, in reality, the height position of each grounding tool relative to the mud surface changes individually due to changes in the undulation of the mud surface. Even if the seeding depth of the device is maintained within the set range, there will be variations in the seeding depth of other seeding devices, resulting in poor germination due to the seeding depth being too deep, or failure due to the seeding depth being too shallow. There were problems such as lodging of germinated seedlings or seeds exposed on the mud surface and eaten by birds.

An object of the present invention is to solve this problem without sacrificing the above-mentioned advantages in terms of elevation control.

The seeding machine for flooded fields according to the present invention is equipped with each of the seeding devices so as to be independently vertically movable with respect to the frame, and
The seeding device is characterized in that it is provided with an elastic support mechanism that applies an upward force smaller than a downward force due to its own weight.

In other words, each seeding device is mounted on a frame so that it can be moved up and down separately, and each seeding device is individually given a lifting force smaller than the descending force due to its own weight, so that the ground pressure of the grounding tool in each seeding device is reduced. By making this extremely small, it is possible to move each seeding device up and down independently and sensitively to follow changes in ground pressure caused by changes in the undulation of the mud surface, regardless of whether the mud surface is soft or weak. Basically, the depth of the plow can be adjusted by automatically operating the drive lifting mechanism of the frame to maintain the ground pressure within a set range based on the ground pressure detected by the grounding tool of the specific seeding device. In response to soil fluctuations, the system adopts a simple structure that automatically lifts and lowers the ground pressure, while the unique and sensitive up and down movement of each seeding device follows changes in ground pressure, allowing the grounding tools of each seeding device to follow the undulating mud surface well. In this way, the seeding depth of each seeding device was reliably maintained within the set range, and good seeding could always be carried out regardless of the vertical movement of the traveling machine and changes in the undulation of the mud surface.

Hereinafter, an embodiment of the present invention will be described based on the drawings. A passenger traveling main body 4 equipped with a prime mover 1, two groups of traveling wheels, and a driving section 3 is provided with a three-point linkage mechanism 5 at the rear of the vehicle so that it can be driven up and down. A frame 8 equipped with a plurality of seeding devices 7 (six shown in the drawing) at regular intervals in the horizontal direction is mounted on a supported frame 6 via a pair of left and right links 9, 9. This is a seeding machine for flooded fields that can be suspended and supported, and each of the seeding devices 7 level the mud surface with its bottom surface, and has a seeding device attached to the bottom surface as the machine travels. A plate-shaped grounding tool 11 is provided with a groove forming protrusion 10 for forming a seeding groove a on a muddy surface;
A seed tank 12, a roll 13 that rotates to feed out a fixed amount of seed rice in the tank 12, a guide 14 that guides the fed seed rice to fall into the seeding groove a, and a muddy soil in the seeding groove a behind the grounding tool 11. A backfilling tool 15 for backfilling the seeds is assembled to a seeding frame 16 separately attached to the frame 8. In addition, the backfilling tool 15...
... are biased to swing in the direction of contact with the ground via a spring S.

In addition, each of the seeding devices 7...... respectively connects their seeding frames 16...... to the lifting frame 8.
By attaching them to the four-parallel link mechanism 17 through the four-parallel link mechanism 17, they are configured to be able to move up and down independently with respect to the elevating frame 8. In between, there is an elastic support spring 1 that applies a rising force to the seeding device 7 that is smaller than the downward force due to its own weight.
8...... is interposed. In other words, each of the seeding devices 7 is configured to move up and down in response to changes in the ground pressure of the grounding tools 11.
Incidentally, among the seeding devices 7, the two central ones are configured to move up and down integrally by fixing the seeding frames 16, 16 to each other via a plate 19. Further, each grounding tool 11 is attached to the seeding frame 16 so that its vertical position can be freely changed and fixed, and the vertical position changing means is configured to vertically move the bolt hole 21 for the mounting bolt 20. This is a means for constructing a long hole.

The rotation imparting mechanism for the group of feeding rolls 13 includes a pair of left and right ground rolling wheels 22, 22, which are interlocked with the elevating frame 8 in an integrally rotating state via the shaft 22A, to the group of the seeding device 7. In addition to being equipped on the outside of both the left and right sides of the
The feeding rolls 13, 13 and the interlocking shaft 2 of the sowing device 7 located on one side of the left and right sides
2A through a chain 23, and adjacent ones of the feed rolls 13 are interlocked and connected through a shaft 24. The driving wheels 22, 22 pair are configured to rotate in a synchronous manner to cause the delivery rolls 13 to rotate synchronously. Incidentally, among the interlocking shafts 24, the central two feeding rolls 1
3 and 13 other than the interlocking shafts 24 are provided with universal joints 25 to allow relative vertical movement of adjacent seeding devices 7, 7, etc. within a certain range by refraction.

The driving elevating mechanism 26 of the elevating frame 8 is a hydraulic cylinder that drives the three-point linkage mechanism 5 and swings it up and down. A wire 28 is provided which is switched in conjunction with the vertical movement caused by the change, and the frame 8 is placed at a height position where the ground pressure of the grounding tools 11, 11 of the central seeding devices 7, 7 is maintained within a set range. It is configured to automatically operate to raise and lower the position. In the figure, reference numeral 29 denotes a ground pressure setting spring, which is remotely operated via a lever 30 attached to the machine 4. 31 is a ground leveling tool equipped on the frame 8.

Note that it is desirable to use seed rice coated with an oxygen generating agent. Examples of the oxygen generating agent include lime peroxide containing calcium peroxide as a main component.

According to the above configuration, the other seeding devices 7... By moving up and down individually according to the ground pressure of the grounding tools 11..., all the grounding tools 11... can be slid along the undulating mud surface. Moreover, since the relative vertical movement between adjacent seeding devices 7 is regulated within a certain range by the shaft 24 with the universal joint 25, the soil surface does not change greatly in undulation. If there is a grounding tool 1 for ground pressure detection
The change in ground pressure of the grounding tools 11 in the seeding device 7 that does not have the grounding tools 1 and 11 is transmitted to the grounding pressure detection grounding tools 11 and 11, and the frame 8 is It can be raised and lowered in a direction so that the ground pressure is approximately equal.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the seeding machine for flooded fields according to the present invention, and FIG. 1 is a side view, FIG. 2 is a plan view of the main part, and FIG. 3 is a partially cutaway enlarged side view of the main part. figure,
FIG. 4 is a sectional view taken along the line of FIG. 3, and FIG. 5 is an enlarged longitudinal sectional side view of the main parts. 4... Traveling main unit, 8... Frame, 11... Grounding tool, 7... Seeding device, 26... Drive lifting mechanism,
18...Elastic support mechanism.

Claims (1)

[Claims] 1. A seeding device 7 with a plurality of grounding tools 11 is attached to a frame 8 supported by the traveling main unit 4 so that it can be driven up and down.
are installed at appropriate intervals in the lateral direction, and the drive elevating mechanism 26 of the frame 8 is based on ground pressure detection of the grounding tool 11 attached to at least one of the seeding devices 7. This seeding machine for flooded fields is configured to automatically operate so that the ground pressure is maintained within a set range, and each of the seeding devices 7 is connected to a frame 8.
An elastic support mechanism 18 is provided so as to be able to move up and down independently of the seeding device 7, and provides an upward force smaller than a downward force due to its own weight to the seeding device 7.
A seeding machine for flooded fields, characterized by being equipped with...