JPS642581Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a float device in a rice transplanter. In the case of a so-called integrated type float in which a single float is installed between the running wheels from the front to the rear of the machine, the leveling part A of the planted field is generally located at the planting device rotor, as shown in Figures 5 to 7. The leveling part A, which extends below the planting device B and is located below the planting device B, is formed into a flat plate shape by recessing the top surface of the float so that the planting device B does not interfere with it. However, with such a float, both sides of the float are close to the wheels (2), so the mud lifted by the wheels (2) during the planting operation falls directly onto the leveling section (A) below the planting device, and this prevents the machine from moving. Inconveniences that reduced performance and planting performance were unavoidable. Therefore, if the leveling action part A below the planting device R is notched, the above-mentioned problem will be solved, but if only the notch is made, the width of the float in this part becomes narrower, and furthermore, mud is usually placed on the lower surface of the center of the float in the width direction. As the grooves are formed and the upper and lower wall thicknesses of these parts are thinner, the strength of the float is significantly reduced, causing the float to warp and become deformed while traveling in the field.
There is a risk that the float may be damaged during transportation or that the buoyancy at the rear of the float may be insufficient. Of course, it is possible to prevent the strength from decreasing by increasing the wall thickness of the float itself or using a strong material (e.g. iron plate, duralumin, etc.), but this would actually increase the weight of the float and increase the cost. occurs.

The present invention solves the above-mentioned inconveniences and shortcomings at once with a simple structure, and has a float between the running wheels and a mud guide groove on the lower surface of the float. The width of the float closer to the front in the direction of movement of the aircraft near the axle is wider than between the seedling planting rows, and the width of the float closer to the rear in the direction of movement of the aircraft from the vicinity of the axle is narrower than between the seedling planting rows; By partially lowering the height of the mud guide groove in the narrow float section and providing a hollow section above the mud guide groove, the inconvenience of mud lifted by the wheels during planting work falling and accumulating on the float is eliminated. Although it can greatly improve the running performance and planting performance of the aircraft, it is also possible to increase the strength of the float in the part where the strength is weakened due to the narrow width configuration without using any extra parts. The present invention aims to provide a float device for a rice transplanter that not only can prevent the float from being deformed and damaged, but also can increase the buoyancy at the rear of the float.

To explain the configuration of the present invention with reference to one embodiment shown in the drawings, in FIGS. 1 and 2, 1 has an engine 2 mounted at the front in the direction of movement of the aircraft, and a seedling stand 3 tilted backwards at the rear. This rice transplanter is constructed in such a manner that it can be reciprocated from side to side, and has a planting device 4 disposed in front of the seedling outlet at the lower end of the slanted seedling platform 3. Traveling wheels 6, 6 for propulsion of the aircraft are mounted on a shaft so as to be movable up and down, respectively, via swing cases 5, 5 each containing a chain.
The center of gravity G of the rice transplanter 1 is configured to be located near the axle 6' of the running wheels 6, 6 during planting work in order to maintain good longitudinal balance of the machine and achieve stable running performance. There is. 7 is a transmission case, 8 is a fuselage frame, and 9 is a drive case. After the power from the engine 2 passes through the transmission case 7, it is transmitted to the running wheels 6, 6 and the planting device 4 via each power transmission mechanism. and seedling stand 3
The pine seedlings (not shown) placed on the seedling stand 3, which reciprocates from side to side, move up and down in a fixed motion trajectory. The seedlings are scraped off one by one by a device 4 and successively planted at seedling planting positions on the rice field. Reference numeral 10 denotes a float, and the float 10 is located between the left and right wheels 6, 6, and is formed into an integrated float with a long ground contact length from the front to the rear of the fuselage. ), and hanger 10'a at the rear of the aircraft.
They are each connected to the aircraft via. A portion of the float 10 near the axle 6' toward the front in the machine traveling direction is formed wider than the seedling planting row spacing l, and on both left and right sides of the wide float section are leveling areas 10a, 10a for the seedling planting field surface. is provided. In addition, the float width near the axle 6' toward the rear in the machine's traveling direction is narrower than the seedling planting row spacing l, so that the float portion formed narrower is located inside the seedling planting row spacing l. The distance between the rear part of the wheels 6, 6, where most of the mud lifted by the wheels 6, 6 falls during the planting operation, and the floating part facing it is as shown in Figure 1. 6,6
The space is wider than the distance between the front half of the float 10 and the leveling section 10a of the float 10, and a mud fall gap section a is formed in this section.

On the other hand, reference numeral 11 denotes a mud guide groove, and the mud guide groove 11 is provided in the front-rear direction (longitudinal direction) at the center of the lower surface of the float 10. And mud guide groove 1
As shown in Figure 3, the height of the groove 1 is h ₁ at the front of the float 10, and higher than h ₁ at the center.
h ₂ , and further lower the groove bottom surface in front of the fuselage connection part 12 at the rear of the float 10, that is, in the lower part of the planting device 4, by a required dimension to make the groove height in that part h ₃ , which is lower than h ₂ . As a result, above the mud guide groove 11 in this part, a hollow part 13 as shown in FIG.
is formed.

Next, the operation of the present invention will be explained. After placing the pine seedlings on the seedling platform 3, the machine moves forward to start seedling planting work, and the planting device 4, which moves up and down in a constant trajectory, moves back and forth from side to side.
The pine seedlings are scraped one by one and successively planted at the seedling planting position on the rice field which has been leveled by the leveling unit 10a of the float 10. During the above-mentioned planting work, the mud that is lifted up by adhering to the lugs, links, spokes, etc. of the wheels 6, 6 falls off due to its own weight during the rotation of the wheels 6, 6, but the mud often falls off. Since the float portions are located inside the seedling planting row spacing l and are spaced apart from the wheels 6, the mud does not fall and accumulate on the floats 10, but gradually falls onto the rice field through the mud fall gap a. Since it is reduced, it is possible to reliably eliminate adverse effects such as sinking of the float 10 and mud pushing due to mud accumulation on the float 10, and significantly improve the running performance and seedling planting performance of the aircraft body. Furthermore, since the float width near the axle 6' where the center of gravity G of the aircraft is located is wide as before, the rolling load of the aircraft can be sufficiently received by the wide float portion, and therefore the rolling effect of the float 10 is reduced. It is well maintained as before.

Furthermore, a connecting portion 12 of the float 10 to the rear of the fuselage
By lowering the bottom surface of the mud guide groove 11 located at the front by a required dimension and forming a hollow portion 13 therein, the float structure of this portion is changed to the upper surface plate 10b and the lower surface plate 1.
0c, it is possible to create a hollow double structure over the entire width as shown in Figure 4, and although the float width is narrow, its strength can be greatly increased, and it can be prevented from warping or deforming the float over time or by external forces. This can reliably prevent damage to the float.

Moreover, while traveling on the rice field, the mud guided from the front end of the mud guide groove 11 of the float 10 is transferred to the float 1.
Since the groove height increases from h ₁ to h ₂ at the center of 0, the flow resistance of the mud in the groove decreases, but at the forward position of the connection part 12 to the rear of the fuselage, the groove height increases from h ₂ to h again. ₃ , the flow resistance of the mud increases rapidly in this area, which acts to push the rear part of the float 10 upwards. The buoyancy of the rear part of the float 10 can be increased as much as possible while maintaining the balance between the front and rear of the float. Therefore, even if the rear portion of the float 10 is narrow, the float function can be fully exerted as in the conventional float without causing insufficient buoyancy and sinking.

Furthermore, together with the elimination of mud accumulation on the float 10, the flow of mud between the float 10 and the wheels 6 is improved, and an adverse effect on adjacent already planted seedlings can be prevented.

As described above, the present invention has a float between the running wheels and a mud guide groove on the lower surface of the float, and the width of the float is closer to the front in the direction of movement of the aircraft than near the axle of the running wheel. The width of the float is formed wider than between the rows, and the float width closer to the rear in the aircraft traveling direction than the area near the axle is narrower than the width between the seedling planting rows, and the height of the mud guide groove of the narrow float section is partially lowered. Since a hollow part is provided above the mud guide groove, the inconvenience of mud lifted by the wheels falling and accumulating on the float during planting work can be eliminated, and the running performance and seedling planting performance of the aircraft can be greatly improved. However, due to the narrow width structure, it is possible to increase the strength of the float in areas where the strength is weakened without using any extra reinforcing members or strong steel float materials, which reduces float warping and
Not only can deformation and breakage be reliably prevented, but the buoyancy of the narrow width float portion can be maintained as well as before without any reduction in the buoyancy.
The float also provides a sufficient function to prevent the aircraft from rolling.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway plan view of a rice transplanter equipped with the present invention, Figure 2 is a side view of the same as above, Figure 3 is a vertical side view of the main part, and Figure 4 is a cross section taken along line A-A in Figure 3. 5 is a partially cutaway plan view of the conventional example, FIG. 6 is a side view of the same, and FIG. 7 is a sectional view taken along the line B--B in FIGS. 5 and 6. In the figure, 6 and 6 are running wheels, 6' is an axle, 10 is a float, 10a is a leveling part, 11 is a mud guide groove, 13 is a hollow part, and l is a seedling planting row spacing.

Claims (1)

[Scope of utility model registration request] A float is provided between the running wheels, and a mud guide groove is provided on the lower surface of the float, and the width of the float closer to the front in the direction of movement of the aircraft than near the axle of the running wheel is formed wider than between the seedling planting rows, The width of the float closer to the rear in the direction of movement of the aircraft than in the vicinity of the axle is formed to be narrower than between the seedling planting rows, and the height of the mud guide groove of the narrow float part is partially lowered to form a hollow section above the mud guide groove. A float device in a rice transplanter characterized by being provided with.