JPH0218803B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a riding type rice transplanter in which a seedling planting device is interlocked and connected to a traveling vehicle body equipped with a traveling transmission mechanism so as to be operable to raise and lower the rice seedlings.

When the rice transplanter is traveling for work, it is desirable to travel at a lower speed when turning around the headland than when traveling for planting work, and it is also desired to travel at high speed when traveling on the road. Therefore, conventionally, a desired speed is obtained by operating a transmission mechanism depending on the driving state, turning state, and road driving state of the planting operation, but in addition to raising and lowering the seedling planting device, the shifting operation is This resulted in a decrease in operability.

In view of the above-mentioned points, it is an object of the present invention to enable a planter to perform planting work traveling, turning, and traveling on the road at speeds suitable for each without any operational hassles.

Next, embodiments of the present invention will be described in detail based on the drawings.

A pair of left and right wheels 1, 1, 2, 2 for each of the above.
An engine E is mounted on the front part of the traveling vehicle body, which is mounted on an axis and a control unit 3 is arranged, and a seedling planting device 5 is interlocked and connected to the rear part via a quadruple link mechanism 4 so that it can be driven up and down. It consists of a type rice transplanter.

To drive the wheels 1 and 2 and the seedling planting device 5, a transmission belt 10 is wound around a split pulley 7 mounted on the engine output shaft 6 and an input pulley 9 mounted on the transmission input shaft 8. At the same time, a tension pulley 11 is applied to the belt 10 to apply tension, and by moving the movable piece 12 of the split pulley 7 toward and away from the fixed piece 13, a continuously variable speed is achieved. A belt type continuously variable transmission mechanism 14 is configured to be operable.

A step portion 15 is integrally formed on the movable piece 12, and a swinging arm 16 that contacts the step portion 15 to prevent the movable piece 12 from moving toward the low speed side due to the driving force of the belt 10 is pivoted to the engine E. A swinging arm 16 and a lever 17 protruding at a predetermined phase from the link 4a constituting the quadruple link mechanism 4 are connected in a supporting manner,
The movable piece 12 is brought close to the fixed piece 13 at a low planting work position A where the seedling planting device 5 is lowered to the ground by interlocking connection via the push/pull rod 18, and the speed is changed to a high speed state, and from that position A, for example, At a medium non-working position B on a headland or the like, which has been raised by about 60 cm, the lever 17 and the rod 18 are connected almost in a straight line, the movable piece 12 is separated from the fixed piece 13 the most, and the speed is changed to a low speed state, Furthermore, at a high non-working position C, such as when traveling on a road, which is further elevated by about 30 cm from the position B, the movable piece 12 is again moved to the fixed piece 1.
3, and is configured to be shifted to a high speed state.

An example of the relationship between the position of the seedling planting device 5 relative to the machine body and the traveling speed is as shown in the graph in FIG.
sec, approximately 0.45 to 0.50m/at medium non-working position B
sec, and about 0.7m/in the high non-working position C.
A speed of sec can be obtained respectively.

The interlocking connection between the lever 17 and the movable piece 12 of the split pulley 7 is not limited to the one consisting of the arm 16 and rod 18 as described above, but various modifications such as wires are possible, and these can be used to It is collectively referred to as the formula interlocking mechanism 19.

Further, in the present invention, in order to continuously change the traveling speed, it is possible to adopt not only the belt type continuously variable transmission mechanism 14 as described above but also a fluid pressure type transmission mechanism using a hydraulic motor with variable discharge capacity, etc. , these are collectively referred to as a traveling transmission mechanism 14.

Further, in order to interlock and connect the transmission mechanism 14 and the seedling planting device 5, a device for detecting the position of the seedling planting device 5 with respect to the machine body is attached, and according to the detection result of the detection device, the three positions A and B are set. .

In summary, the present invention, in the aforementioned riding-type rice transplanter, raises and lowers the seedling planting device to three positions: a low planting work position, and medium and high non-work positions.
The seedling planting device is configured to be capable of being stopped, and is configured to travel with the seedling planting device so that the traveling speed at the intermediate non-working position is lower than the traveling speed at either the planting working position or the higher non-working position. It is characterized by being linked with a transmission mechanism.

That is, when the vehicle is traveling for planting work, the seedling planting device 5 is operated to the lower planting work position A, and when traveling on the road, the seedling planting device 5 is operated to the higher non-working position C. Therefore, as the seedling planting device 5 is raised and lowered, the traveling transmission mechanism 14 is automatically shifted to a predetermined traveling speed.

Then, when the seedling planting device 5 travels at the predetermined traveling speed (the seedling planting device 5 is at the low planting work position A) and reaches the headland after completing one planting process, the seedling planting device 5 is moved to the low planting position A. A lifting operation is performed to a non-working position B between the planting working position A and a higher non-working position C. As a result, the traveling transmission mechanism 14 is automatically decelerated to a speed lower than the predetermined traveling speed, and turning at the headland can be performed at a safe low speed.

In this way, by raising and lowering the seedling planting device 5 to a position corresponding to each work type, a traveling speed corresponding to each work type can be obtained without having to perform a particular speed change operation for traveling. I was able to improve my sexual performance.

[Brief explanation of drawings]

The drawings show an embodiment of the riding-type rice transplanter according to the present invention, in which Fig. 1 is an overall side view, Fig. 2 is a side view showing a mechanical interlocking mechanism, and Fig. 3 is a part of the main part of Fig. 2. FIG. 4 is a cross-sectional view of FIG. 2 with the line partially omitted, and FIG. 5 is a graph showing the relationship between the amount of rise of the seedling planting device and the traveling speed. 5... Seedling planting device, 7... Split pulley, 10...
Transmission belt, 12...Movable piece, 14...Transmission mechanism for traveling, 17...Lever, 19...Mechanical interlocking mechanism, A...Low planting work position, B...Middle non-work position, C...High non-working position.

Claims (1)

[Scope of Claims] 1. A riding rice transplanter in which a seedling planting device 5 is interlocked and connected to a traveling vehicle body equipped with a traveling transmission mechanism 14 so as to be operable to raise and lower the seedlings, and the seedling planting device 5 is connected to a traveling vehicle body that is equipped with a traveling transmission mechanism 14. The planting work position A and the medium and high non-working positions B and C can be raised, lowered, and stopped, and the planting work position A and the high non-working position C
so that the traveling speed at the intermediate non-working position B is lower than any traveling speed at
A riding rice transplanter in which a seedling planting device 5 and a traveling transmission mechanism 14 are linked. 2. The traveling transmission mechanism 14 is configured by a continuously variable transmission mechanism in which a transmission belt 10 is wound around a split pulley 7, and is integrated with the movable piece 12 of the split pulley 7 and the seedling planting device 5. The lever 17 is interlocked and connected via a mechanical interlocking mechanism 19, and the attachment phase of the lever 17 to the seedling planting device 5 is changed to the intermediate non-working position as the seedling planting device 5 moves up and down. Claim 1: The movable piece 12 is set to be displaced from the low-speed side to the high-speed side by swinging the lever 17 from B to the lower planting work position A or the higher non-work position C. The riding-type rice transplanter described in section.