JPS5832928B2 - Tauekiniokerukitaishiseijidousyuseisouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises: a pair of left and right running wheels that move on a plowing platform; a center float that slides on a mud surface at the lateral outer side of each wheel; The present invention relates to a rice transplanter having side floats.

When performing rice planting work with this type of rice transplanter, conventionally, prior to work, the machine manually operated the left and right running wheels so that the seedlings were planted in the desired posture and depth, and the planting depth was set at the desired posture and depth. However, with this method, during planting, the depth changed depending on the posture due to momentary fluctuations in the absolute depth between the mud surface and the tiller. , it is inevitable that planting will cause disturbances in posture.

Therefore, it is required to raise and lower the left and right running wheels simultaneously relative to the machine body in accordance with the ever-changing depth of the feeding material between the mud surface and the plowing platform. This kind of elevation adjustment is not possible.

In addition, if there is an unexpected change in the posture of the machine in the left and right directions relative to the direction of movement due to unevenness or inclination of the tiller, or unevenness of the mud surface, the planting depth may be reduced, especially in the case of multi-row planting. Since there is a large variation in the depth, it is necessary to fully take into account such factors such as the attitude fluctuation of the aircraft in order to maintain a constant planting depth.

In view of the above-mentioned circumstances, the present invention has been developed to maintain the aircraft in a stable posture at all times despite changes in the depth of the plow and all factors that change the attitude of the aircraft, and to plant at the desired depth and attitude. The present invention aims to provide an automatic body attitude correction device for a rice transplanter that can perform the following operations.

That is, the present invention comprises a pair of left and right running wheels that move on a tiller, and a center float and side floats that slide between the left and right running wheels and slide on the mud surface at the lateral outer portions of each wheel. The rice transplanter has a mechanism that senses the vertical movement of the center float relative to the machine body and raises and lowers both the left and right axles simultaneously in the same direction, and a mechanism that senses the vertical movement of each side float relative to the machine body to independently move each wheel. This system is characterized by having a mechanism for raising and lowering the soil, so under conditions where the tiller in the working field changes from time to time, the central float is equipped with a mechanism that allows the tiller to move up and down. By simultaneously raising and lowering both axles in the same direction in response to the vertical movement of the aircraft, it is possible to maintain a constant planting height on the mud surface at all times, eliminating the need for planting caused by variations in the plowing depth. It is possible to suppress the disturbance of attitude and the generation of floating seedlings, and in addition, under conditions that involve changes in the attitude of the aircraft in the left and right directions with respect to the direction of movement of the aircraft, such as unevenness of the tiller, each side float By raising and lowering each wheel independently in response to the vertical movement of the aircraft, the aircraft can be maintained in a horizontal or nearly horizontal position at all times regardless of depth fluctuations in the left and right directions, making it possible to maintain In addition to maintaining the stability of the aircraft at the time of planting, planting in the left and right directions can suppress disturbances in posture and depth.

In this way, by providing a mechanism that simultaneously raises and lowers both axles in the same direction and a mechanism that raises and lowers both axles independently, it is possible to achieve good planting without variations in depth even when planting in multiple rows. I was able to do this.

Embodiments of the present invention will be described in detail below based on the drawings.

Figures 1 and 2 show a walking rice transplanter, which is connected to an engine E mounted on the front of a body frame 4 and a transmission case 5.
, 5', and a pair of left and right running wheels 1, 1' that move on the tiller by receiving power through the wheels 1, 5', and a button between the left and right running wheels 1, 1' and a lateral outer side of each wheel 1, 1'. Planting is carried out by installing central flow wheels (2a, 2b) that slide on the mud surface at the planned location, and at the rear of each of the wheels 1, 1', movable wheels that move horizontally to the left and right with respect to the direction of movement of the aircraft. A seedling table 6 with a freely tilted forward posture and a seedling outlet 6a of this seedling table 6 are used for planting unit seedlings in each of the above-mentioned flows 2, 2a,
For planting seedlings formed on the rear part of 2b, a device 9 is provided for planting on the mud surface through the notch 7, etc. The front ends of each of the above-mentioned funnels 2° 2a, 2b are bent links 17...
The rear end is attached to the fuselage frame 4 in a position-adjustable manner, and the rear end of the fuselage frame 4 is attached diagonally upward to the rear of the fuselage frame 4. It is constructed by extending the steering wheel 10.

In such a walk-behind rice transplanter, as shown in FIG. 3, there is a mechanism 3 that senses the vertical movement of the central float 2 relative to the machine body and simultaneously raises and lowers both the left and right axles 1, 1' in the same direction. , a mechanism 3a for independently raising and lowering each wheel 1 or 1' by sensing the vertical movement of each side float 2a or 2b relative to the aircraft;
, 3b are provided.

In addition, the mechanism 3 includes a center bypass type four-port three-position switching valve 11 that can switch three positions in response to the vertical movement of the center float 2 relative to the aircraft above a certain level, and a rod on the transmission cases 5 and 5'. 12.12', a central hydraulic cylinder 14 connected via a link 13 is interposed in a hydraulic circuit A having an oil tank 15 and a hydraulic pump 16, while other mechanisms 3a, 3b The rods 12 and 12' are equipped with four-port three-position switching valves 11a and 11b that can be independently switched to three positions in response to vertical movement of each side float 2a or 2b relative to the aircraft above a certain level. The side hydraulic cylinders 14a and 14b are connected to the hydraulic circuit A.
It is constructed by interposing it inside.

The operation of the automatic machine attitude correction device for the rice transplanter configured as above will be explained as follows.

First, during planting, if the distance between the mud surface and the tiller changes, the switching valve 11 of the mechanism 3 is set to neutral in response to the upward movement or downward movement of the central float 2 above a certain level. The central hydraulic cylinder 14 expands or contracts automatically, and the left and right running wheels 1, 1' are moved simultaneously in the same direction while maintaining a constant planting depth. to raise or lower.

Next, if there are irregularities on the tiller in the left and right directions with respect to the direction of movement of the machine, the mechanism 3a or 3b
The switching valve 11a or llb is automatically switched from the neutral position to either one, and the side fluid pressure cylinder 14a or 14b is expanded or contracted, and the left and right traveling wheels 1 are kept in a horizontal position. or independently raise or lower 1'.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the automatic body posture correction device for a rice transplanter according to the present invention, and FIG. 1 is an overall side view of the walking rice transplanter, and FIG. 2 is a partially cutaway plan view of FIG. Figure 3 is a schematic hydraulic circuit diagram. 1.1'...Traveling wheel, 2...Central float, 2at 2b...Side float, 3
, 3a, 3b...mechanism.

Claims (1)

[Claims] 1 A pair of left and right running wheels 1, 1 that move on the tiller,
In a rice transplanter having left and right running wheels 1, 1' and a center float 2 and side floats 2a and 2b that slide on the mud surface at the lateral outer side of each wheel 1.1', the center float 20; a mechanism 3 that senses the vertical movement of the aircraft body and raises and lowers both the left and right axles 1, 1' in the same direction simultaneously; Mechanisms 3a and 3b for independently raising and lowering
An automatic body attitude correction device for a rice transplanter whose sexual characteristic is that it is equipped with