JPS646018Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a float device for a rice transplanter. In a multi-row rice transplanter with 5 or more rows, an inverted U-shaped center float is generally placed at the center in the machine width direction so as to surround the transplant, and side floats are placed on both sides of the center float. It is customary to automatically raise and lower the planting section by sensing the relative height of the plant to the aircraft body. However, the inverted U-shaped float requires three attachment points to the aircraft body, one at the front and two at the rear, which not only complicates the attachment structure, but also lacks smooth operation and increases weight and cost. In addition, in terms of sensing performance, even though there is an extreme difference between the side float surface of the wheel mark where the field condition is disturbed and the undisturbed center float surface, only the undisturbed center float surface is detected. However, there was a drawback that the side float portion, which occupies most of the transplanted body, was planted shallowly or the planting posture was disturbed.

Furthermore, due to the structure in which sensing is performed only by the center float, it is necessary to provide a large ground surface for the center float to prevent adverse effects such as pitching, and as a result, mud pushing and the like occur significantly, resulting in poor planting performance.

Therefore, the front parts of the side floats are supported on the fuselage frame via links so that they can be raised and lowered, and
It has also been considered to connect the left and right links above with a single rod, and to connect the rod and the planting section lifting device near the center of the machine to detect the average height of the left and right side floats. This method eliminates the above drawbacks, but on the other hand, when the planting area is tilted due to the center of gravity shifting due to the back and forth movement of the seedling stand, the response is insensitive and slow because it uses average value detection. There is a risk that variations may occur.

The present invention was made to solve the above problems all at once, and consists of a center float provided below the center in the widthwise direction of the machine and side floats provided on both left and right sides sandwiching the center float. In a rice transplanter in which the planting depth can be automatically adjusted by interlocking the device with a planting section lifting device, the front part of each of the side floats can be raised and lowered by the body through a lifting mechanism. The vertically movable mechanism of both side floats is connected via a rod, and the center float is suspended from the rod so as to be freely movable within a predetermined range. While connected to the rod at the center, the parts near the rod of both side floats and center float are connected via other rods, so that the front lifting parts of both side floats and center float can be connected with two rods. They can be integrally connected, have a wide sensing area, and respond quickly and sensitively.In addition, even if the center of gravity shifts due to the back and forth movement of the seedling platform, the float on one side will not sink extremely deep or the float on the other side will rise. It is possible to ensure stable followability to the rice field without causing any damage, and the planting depth of each row can always be kept uniform.
Moreover, it is an object of the present invention to provide a float device for a rice transplanter in which the mounting structure of the planting depth adjusting device is simple and strong, and in addition, each float can be made lightweight while ensuring sufficient strength.

To explain the structure of the present invention with reference to an embodiment shown in the drawings, FIG. 1 shows the overall structure of a riding rice transplanter, in which front wheels 1, rear wheels 2,
An engine 4 is mounted on the front part of a running vehicle body 3 which supports the vehicle body 2, and the power of the engine 4 is transmitted to the rear wheels 2 through an appropriate power transmission mechanism to drive the vehicle body 3 in the longitudinal direction. A driver's seat 5 having a steering handle 5a is disposed behind the engine 4, and a riding-type traveling section A is constituted by these components. A planting section B is attached to the rear of the running section A so as to be able to rise and fall freely and roll through a parallel link mechanism 6, and this planting section B is automatically moved by a planting section lifting device C consisting of a hydraulic mechanism. The plant can be raised and lowered to adjust the planting depth to a predetermined depth. Reference numeral 7 designates the body frame of the planting section B, and as shown in FIG. It is made by integrally fixing internal chain cases 9, 9', 9'', and a seedling stand 1 is installed above the fuselage frame 7.
0 is installed via a stay 10' so as to be tilted forward and to be able to reciprocate from side to side. Reference numeral D denotes a float device mounted on the fuselage frame 7, and the float device D includes a short, narrow, substantially rectangular planar center float 11 provided below the center of the planting section B in the machine width direction; It consists of three long and wide side floats 12 and 12' installed on both the left and right sides, sandwiching the float. 13 is an implant, and this implant 13 is located behind the center of the center float 11.
A total of 5 floats, 2 each in the notch a on both the left and right sides of the side floats 12, 12', are installed in the running section A via the transmission cases 8, 8' and the chain cases 9, 9', 9''. It rotates in the vertical direction by power transmitted from the side, and scrapes one pine seedling (not shown) placed on the seedling stand 10 one by one and successively plants it on the rice field. .

The front portions of the side floats 12, 12' are connected to the chain case 9, which constitutes the fuselage frame 7.
The left and right links 14, 1 are suspended from the front end of the 9'' so that they can be raised and lowered using a rear mounting shaft P as a fulcrum via a lifting mechanism M consisting of links 14, 14'.
A rod 15 is inserted between the bending fulcrums 4'. A center float 11 is suspended from the middle of the rod 15 via an L-shaped bracket 11' so as to be freely movable within a predetermined range.
The sensing part 16 of the planting part lifting device C is located near the middle part of the
are connected.

On the other hand, 17 is the other rod disposed parallel to the above rod, and this rod 17 connects the front mounting portions 12a of the side floats 12, 12' and the bracket 11' of the center float 11. These two rods 15 and 17 form a so-called integral connection structure at the front of each of the floats 11, 12, 12'. 18 is a planting depth adjusting device provided near the notch a of the side floats 12, 12' on both the left and right sides;
The relative height of the side floats 12, 12' with respect to the machine body is adjusted by the tilting operation of 8', and the seedlings are planted at an appropriate depth. 19 is a guide plate for the lever 18'.

In the illustrated example, rods 15 and 17 are connected to link 1.
4 and 14' is shown, which makes it possible to reduce the number of parts and simplify the structure. Furthermore, the present invention applies not only to a riding rice transplanter in which the planting part B is mounted to the rear of the running part A as in the above example, but also to a riding rice transplanter in which the planting part B is mounted in front of the running part A. This method can also be adopted for rice transplanters.

Next, the operation of the present invention will be explained. During the planting work, the planting section B, which is pulled by the traveling section A, slides on the rice field level using the float device D, and removes the pine seedlings placed on the seedling stand 10 using the planting bodies 13, 13... The plants are scraped off one by one and planted continuously on the rice field.

By the way, if there are sudden irregularities in a part of the field or plowing platform during planting work, in the conventional independent suspension type float device, the front part of the side float 12 or 12' on the uneven side or the center float 11 Since the floats move up and down accordingly, the heights of the front parts of each float are different, but in this invention, the front parts of the left and right side floats 12, 12' and the center float 11 are integrated by two rods 15, 17. Since the front part of each float cannot be raised or lowered independently, it is as if the three floats 11, 12, 12' are simultaneously raised and lowered as one wide float. Therefore, pitching does not occur due to slight irregularities, and stable followability to the rice field can be achieved, and the planting depth of each row can always be maintained at an appropriate depth.

In particular, when the seedling platform 10 is located at the end of the left-right reciprocating movement, in conventional float devices, one side float sinks extremely deep due to the shift of the center of gravity, resulting in deep planting, and the other side floats up, resulting in shallow planting. However, even in such cases, the present invention not only makes it possible to prevent variations in planting depth as much as possible because each float moves up and down as one, but also eliminates the above-mentioned integrated float structure. Coupled with this, the sensing area is wide, so the operation of the planting section lifting device is sensitive and the planting section can be raised and lowered at a quick timing, thereby significantly improving the sensing performance of the planting section lifting device.

Furthermore, unlike conventional devices, the present invention does not use the center float 11 for sensing, so the size (ground contact area) of the center float 11 only needs to be large enough to slide over the planted field surface. The length and width of the 11 can be made as small as possible, thereby preventing mud from being pushed while driving on the rice field, and the mounting structure can be simplified, making it possible to reduce the weight of the entire planting section. Since the front portions of each float 11, 12, 12' are integrally connected by two rods, sufficient strength is ensured and bending of the float can be prevented as much as possible.

Further, since the present invention has an integral float structure as described above, the planting depth adjusting device 18 only needs to be provided on the left and right side floats 12, 12'.
In this respect, the center float 11 part has less space for the adjustment device 18 and is subject to various restrictions, but the side floats 12 and 12' have more space, so the adjustment device 18, which has a simple structure and strong rigidity, can be provided with sufficient installation space. It is something that can be done.

As described above, the present invention is a planter in which a float device consisting of a center float provided above the center in the width direction of the machine and side floats provided on both left and right sides sandwiching the center float is interlocked and connected to a planting section lifting device. In a rice transplanter in which the planting depth can be automatically adjusted, the front part of each of the side floats is supported on the machine body through a lifting mechanism, and a rod is connected between the lifting mechanisms of both side floats. The center float is suspended from the rod so as to be freely movable within a predetermined range, and the sensing section of the planting section lifting device is connected to the rod at approximately the center in the machine width direction, while both side floats And since the parts near the rods of the center float are connected via other rods, the left and right side floats and the front lifting section of the center float can be integrally connected with two rods, creating a wide three-way structure. This allows stable tracking of the rice field at all times without causing pitting, etc., and in conjunction with the above-mentioned integrated float structure, the sensing area can be widened and The sensing performance of the lifting device can be greatly improved, and the planting section lifting device can be operated quickly and sensitively in response to irregularities in the rice field, especially when the center of gravity shifts due to the left and right reciprocating movement of the seedling platform. This effectively prevents the side float on one side from sinking or rising to an extremely deep level, and the planting depth of each row can always be maintained at a uniform and appropriate planting depth. In addition to greatly improving accuracy and running performance, the entire float can be lightweight while maintaining sufficient strength. In addition, the planting depth adjustment device can be installed in a wide space without being restricted by a narrow space. The center float can be installed on the ground, and has a simple structure and a strong mounting structure.Moreover, the center float can be made as small as possible, simplifying the mounting structure, and preventing mud pushing etc. while driving on the rice field. It has the following effects:

[Brief explanation of drawings]

The drawings show one embodiment of the present invention,
Fig. 1 is an overall side view of a riding rice transplanter equipped with the present invention, Fig. 2 is a side view of the main parts, Fig. 3 is a plan view of the main parts, Fig. 4 is a longitudinal sectional front view of the main parts, and Fig. 5 The figure is a side view showing the mounting structure of the center float, and FIG. 6 is an enlarged side view of the main parts. In the figure, 11 is a center float, 12 and 12' are side floats, 15 and 17 are rods, 16 is a sensing section, B is a planting section, C is a planting section lifting device, D is a float device, and M is a movable up/down device. mechanism.

Claims (1)

[Scope of utility model registration request] A float device consisting of a center float installed below the center in the widthwise direction of the machine and side floats installed on both left and right sides sandwiching the center float is interlocked and connected to the planting section lifting device to automatically adjust the planting depth. In the rice transplanter, the front part of each of the side floats is supported on the body via a lifting mechanism so as to be able to rise and fall freely, and the lifting mechanisms of both side floats are connected via a rod, and the rice transplanter is connected to the rod. The center float is suspended freely within a predetermined range, and the sensing part of the planting section lifting device is connected to the rod at approximately the center in the machine width direction, while the parts of both side floats and the center float near the rod are connected. A float device for a rice transplanter, characterized in that it is connected via another rod.