JPS6331534Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a riding rice transplanter.

A riding rice transplanter is required to be able to plant seedlings at a nearly constant depth and in a constant posture, regardless of changes in depth due to unevenness of the traveling tiller and unevenness of the seedling planting mud surface. .

In order to satisfy the above requirements, conventionally, a seedling planting device is connected to a machine that is supported on the ground with four wheels so that it can swing from side to side around the front and back axis to keep the seedling planting posture almost constant, and a tiller The unevenness of the seedling planting device or the unevenness of the seedling planting mud surface is detected as a vertical swing of the ground float attached to the seedling planting device, and based on the detection result, the seedling planting device is automatically raised and lowered to plant the seedlings. The planting depth was designed to remain approximately constant.

According to the above structure, although the seedling planting depth and the seedling planting posture can be kept almost constant, the following problems occur because the plant is supported on the ground by four wheels.

In order to support the aircraft on the ground with four wheels,
Depending on the unevenness of the tiller, one of the wheels may lift off the tiller.

Therefore, if the machine moves up and down rapidly, the automatic lifting control of the seedling planting device based on the up-and-down movement of the float will not be able to keep up with it, making it impossible to maintain a constant seedling planting depth, as well as the weight of the machine being applied to the wheels. Due to the meandering of the machine due to the fluctuation of

Since the rear wheels roughen the mud surface for planting seedlings, the ground float located behind the rear wheels tends to swing.

Therefore, not only does the row of planted seedlings tend to meander due to the swinging of the grounding float, but also the automatic elevation control of the seedling planting device based on the vertical swinging of the grounding float becomes unstable.

The four-wheeled body support structure and the mechanism for automatically raising and lowering the seedling planting device become complicated.

Therefore, the manufacturing cost of the riding rice transplanter itself becomes high.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a riding-type rice transplanter that can perform a good seedling planting operation while simplifying the overall structure.

In order to achieve the above object, the feature of the present invention is that, in a riding rice transplanter, there is one drive wheel installed at one location in the front and back direction of the machine body, and a vertically swinging wheel that extends toward the rear of the machine body. A seedling planting system, which supports a machine body on the ground by a pair of left and right grounding members, and is provided with ground floats that can freely swing up and down, at the center of the machine body in the width direction and at positions on both sides of the machine body. The attaching device is connected so as to be swingable from side to side about a longitudinal axis passing through a lower position near the seedling planting area and at an intermediate portion in the widthwise direction of the grounding float in the central portion, and further, the above-mentioned grounding member is An elevating mechanism is provided that raises and lowers the seedling planting device from the ground by driving it up and down, and the operating section of this elevating mechanism and the grounding float in the center are connected to each other by vertical swinging of the grounding float in the center. Accordingly, the seedling planting device is interlocked and connected so as to automatically move up and down in order to maintain the grounding float in the set posture, and this configuration provides the following effects.

In other words, since the machine body is supported at three points: the drive wheels and the pair of left and right ground contact members, the machine body can be supported stably at all times even when the tiller is uneven, and the soil surface for seedling planting is prevented from being disturbed by the ground contact members. Few.

In such a body support structure, the seedling planting device is automatically raised and lowered based on the vertical swing changes of the grounding float in the center, and the grounding float in the center is used as a control standard for automatically raising and lowering the seedling planting device. By doing so, even if each of the left and right ground floats rides on a convex part of the seedling planting mud surface, the amount of vertical change of the center ground float, which is the reference for the automatic control, will be halved. It is possible to suppress errors in the automatic lifting and lowering control of the seedling planting device to a small level,
Overall, it is possible to more effectively plant seedlings at a constant depth and in a constant posture, regardless of the irregularities and depth changes of the tiller and the unevenness of the seedling planting mud surface, while simplifying the overall structure. can.

Next, embodiments of the present invention will be described in detail with reference to the drawings.

At the rear of the fuselage 2, a driving wheel 1 is provided at one location in the front-rear direction when viewed from the side and at the center in the left-right direction of the fuselage when viewed from above, and floats 3 are provided at the left-right center and on both left and right sides, and are capable of vertically swinging. The seedling planting device 4 is connected to the central float 3 so as to be swingable left and right around the front and rear axis passing between the left and right sides and near the seedling planting area, and the swingable grounding members 8 and 8 are connected to the body 2.
The machine body 2 is supported by the driving wheels 1 and the grounding members 8, 8, and the seedling planting device 4 is raised and lowered from the ground by the rocking of the grounding members 8, 8. A lifting mechanism 5 is provided to raise and lower the rice transplanter, a boarding seat 6 is disposed at the rear of the body 2, and a control section 7 is disposed at the front of the machine body 2, thereby forming a single-wheeled riding rice transplanter when viewed from the side. .

The elevating mechanism 5 includes a sled-shaped grounding member 8 that swings up and down on the lower surface side of the left and right floats 3, 3, and contacts the lower surface of the float to prevent the seedling planting device 4 from swinging left and right. . The bending link mechanism 11 is pivotally connected, and an arm 13 having a wheel 12 that can freely roll around a horizontal axis is fixed to the link 11a connected to the arm 10, and a fluid pressure cylinder is attached to the connecting member 9. 14, and the grounding member 8, by switching the control valve 15 with respect to the cylinder 14,
The seedling planting device 4 is raised and lowered from the ground by raising and lowering the seedling planting device 8 and the wheels 12, 12 against each other.

To configure the operating structure 16 for the lifting mechanism 5, an operating tool 17 that can be freely swung around a horizontal axis and a member 18 that is pivotally supported at an intermediate portion are pivotally connected by a link 19, and the control valve 15 is operated. A bell crank 20 is pivotally connected to the portion 15a.
and the link 18 are interlocked and connected by an arm 21, and at the same time, a flexible part A is provided between the link 18 and the arm 21, so that the swinging operation of the operating tool 17 exceeding the flexible amount of the flexible part A is prevented. Accordingly, the grounding members 8, 8 and the wheels 12, 12 can be moved up and down in opposite directions.

To attach the left and right floats 3, 3 to the planting case 22, as shown in FIG.
An arm 24 is fixed rearward to a rotating shaft 23 passing through the case 22 in the left-right direction, and a crank-shaped member 25 that bends backward is attached to both left and right sides of the case 22. An arm 26 that pivotally holds the rotating shaft 23 is fixed, and the rear end of the float 3 is pivotally connected to the rear end of the arm 24, and the bending member 25 and the front part of the float 3 are pivotally connected by a bending link 28. It is connected.

To attach the central float 3 to the case 22, as shown in FIG. 5, a rearwardly facing arm 29 is fixed to the rotating shaft 23, and a bent portion of a bell crank 30 is pivotally connected to the rear end of this arm 29. At the same time, the rear part of the central float 3 is pivotally connected to one end side of the bell crank 30, and the case 2
A bending link 31 is pivotally connected to the front part of the float 2 and the front part of the float, and an operating lever 32 that can be fixed and operated in a plurality of positions is fixed to the rotating shaft 23, so that the position of the lever 32 can be changed. By moving the floats 3 up and down in parallel by operation, the seedling planting depth can be changed and set while keeping the float attitude approximately constant.

A link 34 connects the rear end side of the arm 33 which is pivotally supported at the other end side and the intermediate portion of the bell crank 30.
At the same time, the front end side of the arm 33 and the lower end side of the bell crank 20 are pivotally connected by a link 35, and the switching operation of the operating part 15a accompanying the vertical swinging of the central float 3 is performed. Accordingly, the seedling planting device 4 is automatically raised and lowered to maintain the float 3 in a set posture.

Furthermore, a biasing mechanism 36 for pressing the central float 3 against the mud surface is provided between the bell crank 20 and the pivot member 18, and this biasing mechanism 36
The operating tool 17 in the flexible range of the flexible part A
A mechanism B is configured in which the biasing force of the central float 3 can be changed and set by a swinging operation, that is, the operating tool 17 for the lifting mechanism 5 is also used to change and set the biasing force of the central float 3 to press the mud surface. It has been done.

Incidentally, the seedling planting device 4 may be raised and lowered from the ground by a lifting mechanism 5 using a lift arm, and the lifting mechanism 5 and the lifting form can be modified in various ways.

[Brief explanation of the drawing]

The drawings show an embodiment of the riding rice transplanter according to the present invention, in which Fig. 1 is an overall side view, Fig. 2 is a schematic side view of the lifting mechanism, Fig. 3 is a rear view of the float, and Fig. 4 shows the left and right floats. FIG. 5 is a side view of the central float and the operating structure of the lifting mechanism. DESCRIPTION OF SYMBOLS 1... Drive wheel, 2... Body, 3... Float, 4... Seedling planting device, 5... Lifting mechanism, 15a
...Operation section.

Claims (1)

[Scope of utility model registration request] The fuselage 2 is constructed by one drive wheel 1 provided at one location in the longitudinal direction of the fuselage 2 and a pair of left and right grounding members 8, 8 extending toward the rear of the fuselage 2 and capable of vertically swinging.
to the ground, and to the aircraft 2,
A seedling planting device 4 equipped with vertically swingable grounding floats 3 is installed at the center in the widthwise direction of the body 2 and at both left and right sides.
The grounding members 8, 8 are connected to each other so as to be swingable from side to side around a longitudinal axis passing through a lower position near the seedling planting area at an intermediate portion in the lateral width direction of the ground members 8, 8, and further to drive the grounding members 8, 8 to swing up and down. Therefore, an elevating mechanism 5 for elevating the seedling planting device 4 from the ground is provided, and an operating section 15a of the elevating mechanism 5 and the grounding float 3 at the center are connected to the up and down movement of the grounding float 3 at the center. A riding-type rice transplanter characterized in that the seedling planting device 4 is interlocked and connected so as to automatically raise and lower the seedling planting device 4 in order to maintain the grounding float 3 in a set posture.