JPS6158127B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a riding type rice transplanter, and more specifically, it is a five-row planting machine that plants seedlings in one row at the left and right center and two rows on each side of the left and right sides at the rear of the towing vehicle body. This article relates to a riding rice transplanter.

Traditionally, rice transplanters were developed from walk-behind models, so the structure was such that the seedling planting position was located narrowly on the left and right center line of the running vehicle, making it suitable for the operator to walk along the seedling planting track. . For this reason, even though the development of riding-type rice transplanters has progressed, the conventional practice is not to arrange the seedling planting position in the left and right center of the towing vehicle body, but to plant an even number of seedlings at once for 4-row planting or 6-row planting. The structure was similar to that of a riding rice transplanter.

However, in the case of a riding rice transplanter, from the perspective of seedling planting work in the field, it is better to plant as many rows of seedlings as possible at once; Based on the contradictory idea that fewer rows are better, we decided that a riding-type rice transplanter for 5-row planting was the best, and developed the first riding-type rice transplanter for 5-row planting. However, in developing this invention, the front wheels and rear wheels of the towing vehicle body do not unnecessarily disturb the position between the planting rows of many seedlings, and moreover, the tracks of their passage can be accurately leveled, and the rice transplanting device The purpose of this project is to create a riding-type rice transplanter with a structure that allows accurate lifting and lowering control using the ground pressure of a small soil leveling float.

To achieve this objective, the present invention has the following technical means.

That is, a pair of left and right front wheels 6, 6 and rear wheels 7, 7
At the rear of the passenger towing vehicle body 1, there is one center leveling float 14 and a pair of side leveling floats 15, 15 located on both sides of the center leveling float 14. Level the attached strips,
In the side land leveling floats 15, 15, the rice transplanting device 10 for leveling two rows of planting rows is connected to a link mechanism 16.
The link mechanism 16 is operated so that the ground pressure of the central earth leveling float 14 is within a substantially constant range as the ground pressure of the central earth leveling float 14 changes. In this case, the front wheels 6 and the rear wheels 7 are shifted to the left and right in a plan view, and are arranged on the same extension line within the same seedling planting row spacing l, and the side soil leveling floats 15, 15 have front parts The front wheel 6 and the rear wheel 7 are both wide on the left and right, and the center part is long rearward, and the ground is leveled by the side leveling floats 15, 15. The riding-type rice transplanter is configured so that the seedling planting position is in this cutout part A.

One embodiment of the present invention will be described in detail with reference to the drawings. Reference numeral 1 is a passenger-type towing vehicle body, an engine stand 3 is attached to the front part of a transmission case 2, an engine 4 is mounted on the top end of the engine stand 3, A pair of left and right chain cases 5 facing rear is provided on both the left and right sides of the case 2, front wheels 6, 6 are supported on both left and right sides of the engine stand 3, and rear wheels 7, 7 are supported on the left and right outer sides of the chain cases 5, 5. A pilot's seat 8 is installed in the upper part between the cases 5, 5, a steering post is set up between the engine 4 and the driver's seat 8, and a handle 9 is installed on the steering post.

As shown in FIG. 2, the front wheels 6, 6 and the rear wheels 7, 7 are provided with positions slightly shifted to the left and right in plan view.

Reference numeral 10 denotes a rice transplanting device, which is installed on the top of the planting transmission case 11, which is composed of a main transmission case 11a and sub-transmission cases 11b, 11c, and 11d that are provided integrally with the main transmission case 11a and face toward the rear. A movable seedling tank 12 is constructed, and a pair of left and right seedling planting tools 13, 13... are attached to the rear ends of the left and right sub-transmission cases 11b and 11d, respectively, and one on the left side of the central sub-transmission case 11c. Seedling planting tool 13
is installed, and a central soil leveling float 14 and side leveling floats 15, 15 are installed on the lower side of the planting transmission case 11.
The rear parts are pivoted so that the front part can move freely up and down.

The central land leveling float 14 is arranged between rows for planting seedlings.
It is extended back and forth with a width twice as narrow as 2L width, and the left and right intermediate parts on the rear side are cut forward to form a notch A, and one seedling in the center is planted in this part A. The structure is such that the attachment 13 intervenes and the seedlings are planted. The side leveling floats 15, 15 are wide at the front and narrow at the rear by being cut inward on the left and right sides, and are configured so that seedlings can be planted in the narrow cut-out bottom parts.

16 is a link mechanism, a pair of left and right lower links 16
a, 16a and the upper link 16b in the left and right center portions are pivotally connected to a support frame 17 which is installed upright on a joint member that connects the left and right chain cases 5, 5 on the tow vehicle body 1 side, and the tip side is connected to a vertical link 18. A hitch body 19 is attached to this, and the main transmission case 11a of the rice transplanting device 10 is attached to this hitch body 19.

In the connected state of this rice transplanting device 10, the wheel marks of the front wheels 6, 6 and the rear wheels 7, 7 are leveled by the side soil leveling floats 15, 15, and the rice is planted on both sides of the side soil leveling floats 15. It is arranged so as to be located within the row spacing l. In particular, the wheel marks of the rear wheels 7, 7 are removed by the side leveling float 1.
5 and 15, the ground is leveled with long sections before and after the center.

20 is a hydraulic cylinder device, the base of the cylinder is pivotally connected to the transmission case 2, the tip of the piston is connected to the link mechanism 16, and lifts and lowers the rice transplanting device 10. A hydraulic switching valve 20 (not shown) is connected to a rod 21, a bent crank 22 and a wire 23 in front of the central leveling float 14.
The central leveling float 14
When the ground pressure becomes higher than a certain ground pressure suitable for seedling planting work and moves up significantly, the rice transplanting device 10 is switched to the upward side, and when it becomes too low, it is switched to the downward side and the rice transplanter 10 is automatically controlled to move up and down. It is configured to be

To explain the operation of the above example, first, seedlings are placed and stored in the seedling tank 12, and each rotating part is rotated by transmission using the engine 4. Then, the rice transplanting device 10 is towed by the towing vehicle body 1 with the soil leveling floats 14, 15, 15 at the center and sides floating on the surface of the topsoil of the paddy field, and at the same time each seedling planting tool 13 transfers the seedlings. The seedlings are divided and taken out one by one from the tank 12, and the seedlings are planted on the leveled surface soil.

At this time, the positions of the front wheels 6, 6 and the rear wheels 7, 7 are slightly shifted to the left and right, and the front wheels 6 and the rear wheels 7 are rotated within the same row distance l and are rotated. The wheel marks of the front wheels 6 and rear wheels 7, which are located at the front within the width of the gap, provide an accurate propulsion function without having to dig up extremely muddy soil, and are not damaged to the extreme. The ground will be reliably leveled with the ground leveling floats 15, 15.

In addition, the central soil leveling float 14 levels the ground at a single seedling planting position in the center left and right, and its front part moves up and down in response to fluctuations in ground pressure caused by the unevenness of the tiller in the paddy field. When the platform becomes deeper and the towing vehicle body 1 side sinks and the central leveling float 14 is pushed up by the surface of the topsoil, the hydraulic cylinder device 20 and link mechanism 16
The rice transplanting device 10 is raised via the rice planting device 10, and when the tilling platform becomes shallow and the central soil leveling float 14 starts to float up, the rice transplanting device 10 is automatically controlled to be lowered.

At this time, since the center grading float 14 is notched forward at the left and right center portions of the rear side, it is difficult for muddy soil to enter the cutout portion A and cause sideways swinging, so that it always slides in a stable state. On the other hand, the front wheels 6,6
Since the horizontal width of the center leveling float 14 is not wider than the distance between the center leveling float 14, an accurate sensor function is provided without being affected by the lateral vibration of the towing vehicle body 1.

As described above, since the present invention has the above-mentioned configuration, it is possible to create a five-row rice transplanter with good maneuverability and workability as a riding rice transplanter, and the trajectory of the rear wheels 7, 7 when traveling straight is as follows. In the left-right direction in plan view, the positions of the wheels of the front wheel 6 and the wheels of the rear wheel 7 are shifted so that they deviate from the locus of the wheels of the front wheel, so that the traveling trajectories of the two wheels do not overlap, so that the area roughened by the front wheel 6 is removed. The rear wheels will not pass through the area. Therefore, fluctuations in the driving force of the rear wheels are reduced, making it difficult for the towing vehicle body 1 to bounce back and forth, and fluctuations in the heading angle due to the central float 14 are reduced, making it possible to stabilize the planting depth.

In addition, since the center float 14 does not pass through the wheel marks, even if the towing vehicle body 1 rolls, it has little effect, and the ground pressure from the rice field can be accurately received, allowing accurate elevation control of the rice transplanting device. This stabilizes the planting depth. In addition, although this center leveling float has a small left and right width for leveling the soil at the planting position of one row of seedlings, the left and right center portions of the rear side are cut forward and have a cutout, so muddy water can be poured into this area. It can effectively detect the depth of the tiller while gliding stably without causing sideways vibration due to soil entering it, and can control the elevation and descent of the rice transplanter, and it also has a large effect on the left and right vibrations of the machine. To achieve the effect of being able to accurately tow a rice-transplanting device and perform accurate seedling planting work without being forced to move.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a side view, FIG. 2 is a simplified plan view thereof, and FIG. 3 is a side view of the main parts. Symbols in the figure: 1 is the towing vehicle body, 6 is the front wheel, 7 is the rear wheel, 10 is the rice transplanting device, 14 is the center leveling float, 15 is the side leveling float, 16 is the link mechanism, A is the cutout, l is The row spacing between seedlings is shown.

Claims (1)

[Claims] 1 At the rear of the passenger towing vehicle body 1 having a pair of left and right front wheels 6, 6 and rear wheels 7, 7, one center leveling float 14 and a pair of side leveling floats 15, 15 located on both sides thereof are installed. The rice transplanting device 10 is raised and lowered via a link mechanism 16, with the central soil leveling float 14 leveling one row of planting rows, and the side leveling floats 15, 15 leveling two rows of planting rows, respectively. The linkage mechanism 16 is movably attached and operates the link mechanism 16 so that the ground pressure of the central ground leveling float 14 is within a substantially constant range as a result of changes in the ground pressure of the central leveling float 14,
The front wheels 6 and the rear wheels 7 are offset to the left and right in a plan view, and are arranged on an extension line within the same seedling planting row spacing l, and the front portions of the side leveling floats 15, 15 are wide in the left and right directions. The center part is long toward the rear, and both the front wheels 6 and the rear wheels 7 are leveled by the side leveling floats 15, 15.
The central land leveling float 14 is a riding type rice transplanter in which the rear left and right center portions are cut forward with a predetermined width, and the seedling planting position is at this cutout portion A.