JPH03232405A - Riding rice transplanter - Google Patents

Abstract

PURPOSE:To suppress the mud-pushing phenomenon by attaching a pair of right and left height sensors to a seedling transplantation apparatus site at the back of right and left grading members of a grounding float positioned under the transplantation apparatus in the middle of the width and controlling the vertical motion and rolling motion of the vehicle with the sensors. CONSTITUTION:Height sensors 9L and 9R are attached to the left and right of a seedling transplantation member placed at the back of left and right grading members 17, 18 of a grounding float 12 positioned under a seedling transplantation apparatus 4 in the middle of the width. A rolling cylinder 8 is operated based on the data of angle detected by the sensors 9L, 9R to keep the seedling transplantation apparatus 4 parallel to the surface of paddy field G. The seedling transplantation apparatus 4 is maintained at a prescribed level above the paddy field surface G by extending or contracting the lifting cylinder 7.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a ride-on rice transplanter in which a seedling planting device is attached to the body of the machine so that it can be raised and lowered by a first actuator and can be rolled by a second actuator. Regarding machines.

[Conventional technology]

For the above-mentioned riding rice transplanter, an example is JP-A-1-
As disclosed in Publication No. 120210, a grounding float (member (13) described in the above publication) is attached to the left and right center of the lower part of the seedling planting device so as to be movable up and down, and this grounding float follows ground contact with the rice field. Some devices use a first actuator to raise and lower the seedling planting device so that the height of the seedling planting device is maintained at a set value.

A pair of grounding floats (members (6a) and (6b) described in the above publication) are placed on both sides of the center grounding float.
) are attached so that they can move up and down independently, and the seedling planting device is rolled by the second actuator so that there is no difference in height between the left and right ground floats. By the above operations, the seedling planting device is maintained at a set height above the rice field surface and parallel to the rice field surface.

[Problem to be solved by the invention] In addition to the function of the above-mentioned ground float as a height sensor for lifting and lowering and low link operation, it also has the function of erasing the marks of the wheels on the aircraft side, leveling the rice field, and It has a damper function that suppresses small vibrations from the planting equipment, so the left and right widths are widened to ensure sufficient ground contact area.

However, in recent years, riding-type rice transplanters have been put into practical use that increase the planting speed by planting one row using two sets of planting claws. When a grounding float as described above is provided, the phenomenon in which the grounding float pushes the mud on the rice field becomes noticeable due to the high speed.

In particular, a phenomenon occurs in which the mud pushed out to the left and right sides by the left and right ground floats pushes down the seedlings that have already been planted.

Here, an object of the present invention is to reduce the mud-shoving phenomenon while retaining the advantages of the ground float, which are the ground leveling function and the damper function.

[Means to solve the problem]

The feature of the present invention is that the riding-type rice transplanter as described above is configured as follows. In other words, ■ Attach a grounding float to the center of the left and right sides of the bottom of the seedling planting device.
Ground leveling members for erasing the marks of the wheels on the aircraft side are arranged on the left and right sides of this grounding float, and a height sensor is installed in the seedling planting device behind the ground leveling member to detect the height from the field surface to the seedling planting device. a pair of left and right height sensors, and a lifting control means for operating a first actuator for lifting and lowering the seedling planting device so as to maintain a set height of the seedling planting device from the field surface based on the detected value of the height sensor; , so that the seedling planting device is parallel to the field surface, a second device for rolling operation of the seedling planting device of 1 inch is installed.
It is equipped with a low link control means for operating the actuator, and (1) In addition to the configuration of T, the ground float is attached to the left and right center of the lower part of the seedling planting device so that it can move vertically and freely roll. There is a certain thing,
Its action and effects are as follows.

3 Functions] The above-mentioned soil leveling members generally have a structure in which steel wires are arranged side by side at set intervals, or thin flat plates are arranged in the left and right direction, so they have a soil leveling function. However, the amount of mud pushing is small. However, compared to a grounded float, the tamper's ability to suppress minute vibrations of the seedling planting device is small.

The height sensor placed behind the ground leveling member is
Generally, it has a narrow sled shape or is a non-contact type using ultrasonic waves, so it has no special functions other than height detection, and there is no mud pushing.

Therefore, if the above-mentioned ground leveling member and height sensor are configured as in the previous item (2), the ground leveling member will erase the marks left by the wheels on the machine body side and level the rice field where the seedlings will be planted. When the height sensor detects the height from the rice field to the seedling planting device, the height can be accurately detected because the rice field, which is the reference for height detection, has been leveled with a soil leveling member with few irregularities. Based on this height detection, the raising/lowering and rolling operations of the seedling planting device are also performed with high precision.

In the case described above, a grounding float is provided at the left and right center of the lower part of the seedling planting device, so that the ground is leveled by the grounding float, and the damper function of this grounding float also reduces the fine details of the seedling planting device. Vibrations can be suppressed.

In the case of a grounded float, mud pushing phenomenon occurs,
Since the grounding float is located at the center of the left and right sides of the seedling planting device, even if the mud is pushed sideways by this grounding float, it will still be far away from the seedlings that have already been planted. In addition, as mentioned above, the mud pushing phenomenon is inherently rare in the soil leveling members and height sensors installed on the left and right sides of the ground float, so seedlings that have already been planted are not affected by the soil leveling members and height sensors. It is unlikely to be affected.

If configured as in the previous section (■), even if the seedling planting device is raised, lowered, or rolled relative to the rice field, the grounding float will not be related to the operation of the seedling planting device (it will follow the ground contact with the rice field, so it will not be grounded). The float's soil leveling and damper functions are fully demonstrated.

〔Effect of the invention〕

As described above, while retaining the advantages of the ground float (ground leveling function and damper function), it is possible to reduce the phenomenon of seedlings falling over due to mud pushed to the left and right of the seedling planting device, and it is possible to use a high-speed riding rice transplanter. It has also become possible to perform precise lifting, lowering, and rolling operations of the seedling planting device.

〔Example〕

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

As shown in Fig. 1, a planting case (10) is rotatably attached to the rear of the planting mission case (1), and a pair of planting claws (2) are attached to both ends of the planting case (10).
is installed. A seedling stand (3) is provided at the top of the planting mission case (1), and a pair of planting claws (2) alternately take out seedlings from the lower end of this seedling stand (3). ), the seedling planting device (4) is configured to plant the seedlings in the seedlings.

A seedling planting device (4) is connected to the front and back axis (Pl) of the first four-wheel link mechanism (5) extending from the rear of the vehicle body of the riding rice transplanter so that it can roll freely, and the seedling planting device (4) A rolling cylinder (8) (first cylinder) for low-link operation of the seedling planting device (4) is installed between the kite member (6) on the back of the platform (3) and the rear upper end of the first four-wheel link mechanism (5). 2 actuators) are installed. Furthermore, the first
A lifting cylinder (7) drives the four-wheel link mechanism (5) up and down.
) (corresponding to the first actuator) is attached.

As shown in FIGS. 1 and 2, a support arm (11) extends rearward from the lower left and right center of the planting mission case (1), and the horizontal axis of the rear end of this support arm (11) (P3) It can move up and down freely around the front and back axis (P4
) A grounding float (12) is attached around it so that it can roll freely.

In contrast, the second four-wheel link mechanism (16
) are connected so that they can rise and fall freely, and at the rear end of this second four-wheel link mechanism (16) are a ground leveling plate (17) (corresponding to a ground leveling member) and a rod-shaped rake (18) (corresponding to a ground leveling member). are attached so as to be located behind the left and right rear wheels (19) (corresponding to wheels). A spring (20) biases this second four-wheel link mechanism (16) downward.
) is provided.

On the left and right sides of the planting mission case (1), as shown in Figs.
9R) are provided in a pair on the left and right so as to be located behind the ground leveling plate (17) and the rake (18). These height sensors (9L) and (9R) are biased toward the downward swinging side so as to follow the ground surface (G), and
Potentiometers (not shown) are provided to detect the angles of the height sensors (9L) and (9R).

With the above structure, height sensor (9L), (9R)
Based on angle detection, left and right height sensors (9L),
The rolling cylinder (8) is expanded and retracted so that the difference in the vertical angle of (9R) is eliminated, and the seedling planting device (4) is maintained in a position parallel to the rice field (G). Then, the lifting cylinder (7) is expanded and contracted so that the average value of the vertical angles of the left and right height sensors (9L) and (9R) becomes the set value, and the seedling planting device (4) is moved to the rice field (G). The height is maintained at the set height.

As for the height sensors (9L) and (9R), instead of the above-mentioned ground type height sensor, a non-contact type height sensor such as an ultrasonic sensor may be used.

Incidentally, although reference numerals are written in the claims section for convenience and convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of drawings]

The drawings show an embodiment of the riding-type rice transplanter according to the present invention.
The figure is a side view of the rear half of the riding rice transplanter, and FIG. 2 is a plan view showing the arrangement of a grounding float, a ground leveling member, etc. (4)...Seedling planting device, (7)...First
Actuator, (8... Second actuator, (9R), (91)... Height sensor, (
12)... Ground float, (17), (1,8
)... Ground leveling member, (19)... Wheels,
(G)・・・Tamono.

Claims (1)

[Claims] 1. A riding-type rice transplanter in which a seedling planting device (4) is attached to the machine body so that it can be raised and lowered by a first actuator (7) and rolled by a second actuator (8). A grounding float (12) is attached to the left and right center of the lower part of the seedling planting device (4), and this grounding float (
Ground leveling members (17) and (18) for erasing the marks left by the wheels (19) on the aircraft side are arranged on the left and right sides of 12), and seedling planting devices (4) are arranged behind the ground leveling members (17) and (18). ) A pair of height sensors (9R) and (9L) are installed on the left and right sides to detect the height from the field surface (G) to the seedling planting device (4). a lift control means for operating the first actuator (7) so that the seedling planting device (4) maintains a set height above the rice field (G) based on the detected value; A riding rice transplanter comprising a rolling control means for operating the second actuator (8) so as to be parallel to the rice field (G). 2. The riding type rice transplanter according to claim 1, wherein the grounding float (12) is attached to the lower left and right center of the seedling planting device (4) so that it can move vertically and roll freely.