JPH0434650Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a center float structure in rice field working machines such as rice transplanters, seeding machines, and fertilizer applicators.

[Problems to be solved by the prior art and the invention] In general, in this type of paddy field working machine, a center float is swingably provided at the lower front of the base body, and the center float is used to move the rear of the machine when the machine rotates. There is one that is lifted up and pressed against the mud surface, allowing the aircraft to move around easily while being supported by the mud surface.

Therefore, in order for the center float to exhibit a more reliable aircraft support function when the aircraft is rotating, it is necessary to prevent the center float from sinking as much as possible when pressed against the mud surface. It is preferable to make it as wide as possible in the left and right direction, reaching a position corresponding to a work corresponding part such as a planting work part located at the rear. However, if the center float is widened even to the rear side where it is pivoted to the fuselage, if the plowing platform becomes deep and the fuselage sinks downward and the center float swings upward, the rear side of the center float will become wider. The mud pushing phenomenon in which the bottom of the machine sinks into the mud and pushes the mud out extends to the position corresponding to the working area, creating a groove-like shape, and as a result, the working depth becomes shallower than the set value. However, in the case of a rice transplanter, for example, there is a problem in that floating seedlings, fallen seedlings, etc. occur, making it impossible to plant seedlings in an orderly manner at a predetermined depth.

Therefore, some center floats are wide at the front, but narrow at the rear so that they do not reach the position corresponding to the work area, so that even if the center float moves up due to the deepening of the tiller, the center There is also a system in which the mud pushing phenomenon caused by the rear part of the float does not occur at the position corresponding to the work handling part. However, as mentioned above, this product still has the problem of sacrificing the ability to support the aircraft when it is pressed against a muddy surface, resulting in poor workability when the aircraft is moving around. .

[Means for solving the problem] The present invention was created in view of the above-mentioned circumstances with the aim of providing a center float structure for a paddy field work machine that can eliminate these drawbacks. In a rice paddy work machine that is provided with a center float configured such that the rear side is rotatably supported at the lower front of the machine body and the front side is configured to swing up and down, the left and right width of the rear side of the center float is , in setting the center float to be wide enough to reach the position corresponding to the work corresponding part, the bottom surface of the position corresponding to the work corresponding part at the rear of the center float is made high from the front of the pivot part to the rear end. It is.

With this configuration, the present invention allows the center float to be widened to the rear side, but it also prevents mud from pushing the work area into a concave groove when the center float moves upward. This is what I did.

[Example] Next, an example of the present invention will be described based on the drawings. In the drawing, reference numeral 1 denotes the main body of a walk-behind rice transplanter for single-wheel, two-row planting. The machine body 1 is equipped with parts and devices such as a driving handle 6, and the fuselage 1 includes a pair of side floats 7 arranged on both left and right sides of the running wheels 2, and a float according to the present invention arranged in front of the running wheels 2. It is a three-float system using a sensing float 8 which corresponds to a center float.

The sensing float 8 has a rear portion pivotally connected to the transmission case 4 via a pivot shaft 9 so as to be able to swing vertically, while a front portion is operatively connected to a hydraulic valve 11 via a connector 10. There is. When the machine body makes an up-and-down rocking displacement with respect to the field surface due to changes in the unevenness of the tiller, the front side of the sensing float 8 uses the pivot 9 as a fulcrum to make a downward-upward rocking displacement, thereby causing the unevenness of the tiller. is sensed, thereby causing the hydraulic valve 11
When the machine is lowered and becomes deeply planted, the hydraulic cylinder 12 is extended and the traveling wheels 2 are lowered together with the chain case 13 to lift the machine. If the deep planting is corrected and the aircraft rises to a shallow planting state, the hydraulic cylinder 12 is reduced and the traveling wheels 2 are integrated with the chain case 13.
The system corrects shallow planting by raising the machine and lowering the machine, and in this way automatic planting depth control is achieved.

The sensing float 8 is such that its lateral center is located exactly at the center of the left and right planting rows, but its left and right ends are not only on the front side but also on the rear side. It is set to be wider than the planting row position in the left and right direction, and the position corresponding to the planting row corresponding portion is also leveled by this wide sensing float 8.

The bottom surface of the sensing float 8 is curved upward toward the front, and is substantially flat at the rear, but the bottom surface is high at the position 8a corresponding to the planting row. That is, the bottom surface of the sensing float 8 has a position 8a corresponding to the planting row corresponding to the front of the axis 9 (in the embodiment, approximately the middle position of the sensing float 8, and when the sensing float 8 moves upward, it touches the field surface). The bottom height gradually increases from the grounding point (grounding point) to the rear end, and as mentioned above, when the front part of the sensing float 8 moves upward, the position 8a corresponding to the planting row sinks deeply into the mud. It's designed so that you don't have to push the mud.

In the embodiment of the present invention configured as described above, the planting work is performed by the seedling planting operation in the planting section 5 that is timed to the traveling speed of the aircraft. In this case, automatic planting depth control is performed by sensing the up-and-down motion of the sensing float 8, and the sensing float 8 provides a reliable support function for the aircraft when it is rotating. However, the forward trajectory of the planting row is not disturbed by the field sliding operation by the sensing float 8.

That is, in the present invention, the front part of the sensing float 8 swings up and down using the pivot shaft 9 on the rear side as a fulcrum due to the vertical displacement of the body 1. In this case, the rear bottom part of the sensing float 8 Since the position 8a corresponding to the planting row corresponding part is at the bottom height, even if the tiller becomes deeper and the machine body 1 sinks, and the front of the sensing float 8 moves up using the pivot 9 as a fulcrum, the planting row corresponding part There is no need to push or disturb muddy soil in a considerable position. For this reason, the forward locus of the planting row does not become a grooved row due to the sensing float 8, and therefore, seedlings can be planted at a predetermined depth.

In this case, the sensing float 8 has a bottom height only at the position corresponding to the planting row, and the other parts are designed to sink into the mud, so the sensing float 8 is Therefore, the sensing operation will not be hindered.

After finishing the planting work in one stroke and moving on to the next work stroke, it is necessary to rotate the machine, but in this case, lift the rear of the machine and raise the sensing float 8.
The aircraft will be pressed against the mud surface to support the aircraft, but at this time, the sensing float 8 will
Not only the front side but also the rear side are wider than the spacing between the planting rows on the left and right, so they receive as much buoyancy as possible and provide reliable support for the aircraft. This prevents the sensing float 8 from sinking and enables quick and easy moving work.

It should be noted that the present invention is of course not limited to the above embodiments, but the position corresponding to the work corresponding part in the work section is the planting row in the case of a rice transplanter.
In the case of a seed sowing machine, the position corresponding to the sowing row corresponding part is the position corresponding to the sowing row corresponding part, and when used in a fertilizing machine, the position corresponding to the fertilizing row corresponding part is the position corresponding to the work corresponding part. It goes without saying that the center float is not limited to a sensing float.

[Operation and Effect] In summary, since the present invention is constructed as described above, when the aircraft is traveling around, it is possible to lift the rear of the aircraft and press the center float against the mud surface to support the aircraft while traveling. You can, but
At this time, not only the front side but also the rear side of the center float is wider than the position corresponding to the work corresponding part, so when the rear of the machine is lifted and pressed against the mud surface, the center float will not touch the mud surface. The entire center float, which has become wider even on the rear side, is pressed against the mud surface and receives a large buoyant force, which provides reliable support for the aircraft and allows the rear side to Unlike narrower models, the sensing float does not sink too much due to insufficient support for the aircraft, making it possible to move around quickly and easily.

Moreover, as mentioned above, although the rear side was also made wider to avoid sinking of the center float when the machine was turning, the depth of the plowing platform caused the front of the center float to sink when the machine was moving. Even if the center float moves up and the rear side sinks into the mud, the work area at the rear of the center float is at a raised bottom, so there will be no mud pushing phenomenon at that area, and therefore the work area will not be affected. The forward trajectory of the paddy field does not become a concave groove, and as a result, paddy field work can be done in an orderly manner at the desired depth.

[Brief explanation of the drawing]

The drawings show an embodiment of the center float structure in the rice field work machine according to the present invention, in which Fig. 1 is an overall side view of the rice transplanter, Fig. 2 is an overall plan view of the rice transplanter, and Fig. 3 is a sensing device. 4 is a plan view of the sensing float, 5th is a side view of the same, 6th is a rear view of the sensing float, 7th is an explanatory diagram of the operation of the float.
The figure is a sectional view taken along the line A-A in FIG. 4, and FIG. 8 is an explanatory diagram showing the planting state. In the figure, 1 is the main body of the aircraft, 8 is the sensing float, 8a
is the position corresponding to the planting row corresponding part.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A paddy field working machine that is provided with a center float below the front of the machine body, the rear side of which is rotatably supported, and the front side of which is configured to swing up and down, The left and right width of the rear side of the center float is
Paddy field work characterized in that the bottom surface of the rear part of the center float at the position corresponding to the work corresponding part is made high from the front of the pivot part to the rear end when the center float is set to be wide enough to reach the position corresponding to the work corresponding part. Center float structure in the machine. 2. The center float structure for a paddy field working machine according to claim 1, wherein the center float is a sensing float that senses irregularities of the tiller.