JPH0761209B2 - Rolling control device for rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is provided with sensor floats that can be moved up and down independently, on the left and right, and detects the horizontal inclination of a seedling planting device with respect to the rice field from the vertical displacement of each sensor float. The present invention relates to a rolling control device of a rice transplanter configured to operate a rolling control valve that controls the operation of a rolling drive device based on the detection result.

[Prior Art] As a rolling control device for such a rice transplanter, as disclosed in, for example, Japanese Patent Laid-Open No. 61-28314, a support shaft fixed to the machine body for supporting the front part of each sensor float is used. It is known that a cylindrical shaft-shaped sensor shaft for transmitting the vertical displacement of each sensor float is externally fitted and supported.

[Problems to be solved by the invention]

In this conventional structure, the sensor shaft is rotatably fitted on the fixed support shaft that supports the front part of the sensor float, so that the float support structure and the sensor displacement transmission mechanism can be used as parts and the structure can be simple and simple. Although it has the advantage that it can be made compact, if the rotating sensor shaft is exposed to the outside, it is easy for other objects to directly contact the sensor shaft and be deformed or damaged. No
There is a risk that muddy water may adhere and corrode, and the resistance of the sensor float vertical displacement rotation transmission may increase, resulting in deterioration of rolling detection sensitivity.

The present invention has been made in view of such circumstances, and an object of the present invention is to protect the sensor shaft from muddy water and external force so that the detection sensitivity and reliability of the rolling detection structure can be maintained. .

[Means for solving problems]

A characteristic configuration of the present invention is that sensor floats that are independently movable up and down are provided on the left and right sides, and the horizontal inclination with respect to the rice field of the seedling planting device is detected from the vertical displacement of each sensor float, and the rolling drive device is based on the detection result. In the rolling control device of the rice transplanter configured to operate the rolling control valve that controls the operation of the sensor, a sensor that transmits the vertical displacement of each sensor float in a fixed pipe frame that supports the front part of each sensor float. Displacement detection means for detecting the vertical displacement amount of each sensor float based on the difference in the rotation angle of each sensor shaft is provided on the central portion side in the lateral direction of the machine body, and the detection result by this displacement detection means It is configured to output a control command to the rolling control valve based on the above, and further, a sensor shaft is attached to the end of the pipe frame. In addition to supporting, the end of the pipe frame is closed, and a shaft supporting and waterproofing means for preventing intrusion of muddy water into the pipe frame is mounted, and the action and effect thereof are as follows.

[Action]

That is, the sensor shaft is surrounded by a pipe frame that supports the front part of the sensor float, and the sensor shaft is protected from muddy water or external force.

Further, the displacement detection means for detecting the vertical displacement amount of each sensor float based on the difference in the rotation angle of each sensor shaft, in the machine width direction between the pipe frames that individually support the front part of the sensor float. It is arranged on the center side so that the displacement detecting means is hard to contact with another object.

Further, the intrusion of muddy water into the pipe frame is prevented by the shaft supporting and waterproofing means supporting the sensor shaft.

[Effects of the Invention] Therefore, according to the present invention, it is possible to effectively utilize the pipe frame that supports the front portion of the sensor float to protect the sensor shaft, and prevent the sensor shaft from being corroded or deformed or curved. Thus, the rolling detection sensitivity can be maintained excellent.

Further, the displacement detecting means for detecting the vertical displacement amount of each sensor float based on the difference in the rotation angle of each sensor shaft is arranged on the center side of the body where other objects are hard to contact, so the displacement detecting means Can be avoided from contact with other objects, and good rolling sensing performance can be maintained.

Furthermore, since the intrusion of muddy water into the pipe frame is configured to be carried out by the shaft supporting and waterproofing means that supports the sensor shaft, for example, the shaft supporting structure of the sensor shaft and the sealing structure for preventing muddy water intrusion are provided. Compared to the case where it is provided separately,
It is possible to protect the sensor shaft from muddy water by reducing the cost.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 2, a pair of planting claws (2) that are rotationally driven at the rear of the planting mission (1) and seedlings that are slid on the guide rails (3) of the planting mission (1). A seedling planting device (A) composed of a stand (4) and the like is connected to a wheeled machine body shown in FIG. 7 through a four-link mechanism (5).

As shown in FIG. 6, this seedling planting device (A) is rotatably mounted around the front-rear axis (P) at the lower rear end of the four-link mechanism (5), and the four-link mechanism (A). 5) Upper rear end and seedling stand
(4) The rolling operation can be performed by expanding and contracting the double-acting hydraulic cylinder (7) as a seedling planting device drive lifting mechanism that is laid across the rear support part (6).
Further, the entire seedling planting device (A) can be moved up and down by expanding and contracting the single-acting hydraulic cylinder (8) provided in the four-link mechanism (5).

As shown in FIG. 1, a pair of sensor floats for detecting the left and right inclination state are provided outside the lower part of the seedling planting device (A).
(9A) and (9B), and auxiliary floats (10A) and (10B) for maintaining the posture are provided inside thereof so as to be vertically swingable around the rear fulcrum (X). The sizes of these sensor floats (9A), (9B) and auxiliary floats (10A), (10B) are miniaturized to reduce the resistance of muddy water, and even when running at high speeds, excessively large muddy waves are generated. It doesn't stand up. Further, a sensor float (11) for detecting the vertical movement of the seedling planting device (A) is mounted between the auxiliary floats (10A) and (10B) so as to be vertically swingable around the rear fulcrum (X). . In addition, these floats (9
The rear fulcrums (X) of (A), (9B), (10A), (10B), and (11) are all near the rear end, and are lined up horizontally on the same horizontal axis (P ₂ ). . Also, a shallow recess (12) is formed at the rear end of the float (9A), (9B), (10A), (10B), (11), and the inside of this recess (12) is set as the planting position. There is.

Next, the outline of the seedling planting device lifting control means for vertically moving the seedling planting device (A) in the same direction as the sensor float displacement direction based on the vertical displacement of the outer sensor floats (9A) and (9B) Will be explained. As shown in FIGS. 3 and 5, the brackets (16A) and (16B) provided on the rear portions of the sensor floats (9A) and (9B) are vertically movable with respect to the seedling planting device (A). Supports (17A), (17B) and seedling planting section
The sensor shafts (18A) and (18B) are arranged on the left and right in the width direction of (A), and the first crank arm (19A) fixed to the outer end thereof,
(19B) and the upper ends of the brackets (16A) and (16B) with a rod
They are connected via (20A) and (20B) respectively. On the other hand, at the inner ends of the respective sensor shafts (18A) and (18B),
Displacement detecting means (C) for detecting the vertical displacement of each of the sensor floats (9A), (9B) based on the difference in the rotation angle of (A), (18B)
Is provided. That is, the second crank arm (21
A) and (21B) are fixed in opposite directions.
The ends of the crank arms (21A) and (21B) and both ends of the rotary link (22) are connected to the shafts (23A) parallel to the sensor shafts (18A) and (18B), respectively.
A) and (23B) are used for connection, and the center of the rotating link (22) is pivotally attached to the lower end of an elevating rod (24) extending upward. The rotation link (22) is maintained in a horizontal posture in the initial state, and its fulcrum is the sensor shaft (18A),
It is located on the axis of (18B).

The sensor shafts (18A) and (18B) are passed through pipe frames (25) and (25) fixed to the seedling planting device (A), respectively. A lid member (25a) that closes both ends of the pipe frames (25) and (25) is rotatably supported to form a completely waterproof structure. That is, the lid member (2
5a) protects the sensor shafts (18A), (18B) from muddy water and unintentional external force during running and seedling planting, and increases the rotation resistance of the sensor shafts (18A), (18B). The sensor floats (9A) and (9B) are prevented from decreasing in sensitivity.

The elevating rod (24) is linked to a spool of a control valve (V) that controls the hydraulic cylinder (7), and rolling control is performed by vertical movement of the elevating rod (24).

When the seedling planting device (A) is tilted to the left along with the airframe and the left sensor float (9A) is adjusted upward and downward, the bracket (16
(A) rotates rearward, the rod (20A) is pulled rearward, and the left sensor shaft (18A) rotates.
The crank arm (21A) swings upward. Then, in conjunction with the upward swing of the second crank arm (21A), the swing link (22) swings upward around the shaft (23B) connected to the right side second crank arm (21B) to move up and down. Operate spool of control valve (V) by pushing rod (24) up. As a result, the hydraulic cylinder (7) is activated, the seedling planting device (A) is rotated around the front-rear axis (P), and the left sensor float (9A) is lifted to lift the whole seedling planting device (A). Correct parallel to the mud surface. Also, when the seedling planting device (A) is tilted to the right along with the airframe and the sensor float (9B) on the right side is moved up and down, the rotation link (22) is changed to the second crank arm (21) on the left side.
It swings downward around the shaft (23A) connected to (A),
Pull down (24) and operate the spool of the control valve (V). As a result, the hydraulic cylinder (7) is activated, the seedling planting device (A) is rotated around the front-rear axis (P), and this time the sensor float (9A) on the right side is lifted, and the whole planting device (A) is lifted. Is corrected parallel to the mud surface.

In the rear part of the seedling planting device (A), a groove is formed on the mud surface adjacent to the seedling planting place for each row, and a fertilizer applying device for dropping a predetermined amount of fertilizer into the groove (B). Is provided. At the lower end of the fertilizer application device (B), a grooving device for forming a groove on the mud surface.
It is equipped with (26). In order to make the depth of the ditch relative to the mud surface constant, this groove forming part (26) is not the seedling planting device (A) but the sensor floats (9A), (9B), (11) and the auxiliary float (1).
It is fixed to 0A) and (10B). Specifically, as shown in FIG. 4, a rectangular hole is formed on the left lateral side of the rear fulcrum (X) of each float (9A), (9B), (10A), (10B), (11). The grooving device (26) is installed and bolted to the lateral side and bottom of the float. In this way, the grooving device (26) was installed near the rear fulcrum (X) because the float (9A), (9B), (10A), (10B), and (11) moved up and down. This is because the vertical displacement in the vicinity of the fulcrum (X) is the smallest and it is easy to make the depth of the groove formed by the grooving device (26) uniform. Also, each of the floats (9A), (9
B), (10A), (10B), and (11) have a support arm (27) extending rearward from the left lateral side of the recessed portion (12), and a groove for pushing mud outwardly at its rear end. A leveling plate (28) is provided. With this groove grading plate (28), the groove after the fertilizer is supplied is covered with mud.

Brackets (29) on the outer ends of the pipe frames (25), (25)
The support shaft (30) is rotatably supported by the bracket (29), and the partition plate (31) is provided at the outer end of the bracket (29) in a posture along the traveling direction of the machine body. This partition plate (31) suppresses the mud waves generated from the floats (9A), (9B), (10A), (10B) and (11) during traveling, and descends below the seedling planting device (A). This protects the grooving device (26) from hitting and damaging the bottom of the paddy field. If unnecessary, it can be swung together with the support shaft (30) and lifted from the paddy field.

Brackets (32) are provided on the left and right outer sides of the rear ends of the auxiliary floats (10A) and (10B) respectively, and a comb-shaped mud leveling plate (33) which is an example of the leveling tool is provided on the brackets (32). . Each sensor float (9A), (9B), (11) and field float (10A), (10
The mud that is pushed away as (B) moves through the mud, and the embankment that forms between the floats (9A), (9B), (10A), (10B), and (11) is the mud ground plate ( In 33), it is made even and flat.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment of a rolling control device for a rice transplanter according to the present invention. Fig. 1 is a schematic plan view of the seedling planting device, Fig. 2 is a side view of the seedling planting device, and Fig. 3 is a sensor float. FIG. 4 is a view showing a control valve linkage structure, FIG. 4 is a vertical sectional rear view of a sensor float, FIG. 5 is a front view of a raising / lowering control means of a seedling planting device, FIG. 6 is a front view of the seedling planting device, and FIG. Is an overall side view. (9A), (9B) …… Sensor float, (18A), (18B) …… Sensor shaft, (25) …… Pipe frame, (25a) …… Spindle and waterproofing means, (A) …… Seedling planting Attached device, (C) …… Displacement detection means.

Claims (1)

[Claims] 1. A sensor float (9
A) and (9B) are provided on the left and right, and each sensor float (9A) and (9B)
The rice transplanter configured to detect the lateral inclination of the seedling planting device (A) with respect to the rice field from the vertical displacement of the plant and operate the rolling control valve (V) that controls the operation of the rolling drive based on the detection result. In the rolling control device of, each sensor float (9A), (9B) in the fixed pipe frame (25), (25) supporting the front part of (9A), (9B)
A), sensor shaft (18A) that transmits the vertical displacement of (9B),
Displacement detecting means (C) that incorporates (18B) and detects the vertical displacement of each sensor float (9A), (9B) based on the difference in the rotation angle of each sensor shaft (18A), (18B) It is provided on the center side in the left-right direction of the machine body, and is configured to output a control command to the rolling control valve (V) based on the detection result of the displacement detection means (C), and further, the pipe frame (25 ), (2
At the end of 5), the sensor shafts (18A) and (18B) are pivotally supported, and the pipe frames (25) and (25) are closed at the ends to muddy water into the pipe frames (25) and (25). A rolling control device for a rice transplanter, which is equipped with a shaft supporting and waterproofing means (25a) for preventing the intrusion of the rice.