JPH08103128A - Rice transplanter - Google Patents

Abstract

(57) [Summary] [Purpose] The point is to adopt a layout configuration that protects the groove trace grounding body from malfunctioning under the influence of backward pressure on the ridgeline or pressure from the lateral side. . [Structure] A cutout portion C is formed in the leveling float 9, and a groove trace grounding body 10 is arranged in the cutout portion C so as not to project from the rear end of the leveling float 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling planting device mounted on a traveling machine body so that its posture can be freely changed. The present invention relates to a rice transplanter, which is provided with a groove trace depth detecting means for detecting, and uses the detection result of the groove trace depth detecting means for posture control of the seedling planting device.

[0002]

2. Description of the Related Art As shown in FIG. 9, this groove mark depth detecting means is located on the lateral outside of the leveling float 9 and a groove mark grounding body 10 that follows the grounding on the groove trace by the leveling float 9. And the mud surface grounding body 11 that tracks the mud surface of the field by grounding, and both 10 and 11 are located further rearward than the rear end of the leveling float 9 (for example,
Japanese Patent Application No. 5-240797).

[0003]

In the above-mentioned conventional structure, both the grounding bodies are not only located at the rear of the ground leveling float but also exposed without any covering, so that the seedlings are planted at the edge of the ridge. It is feared that if the equipment moves backward without raising it from the surface of the field, the grounding body may come into contact with the ridges, or even if it goes straight, it may be damaged by the lateral flow of mud pushed out by the horizontal soil float. It was An object of the present invention is to protect the groove ground contact body by devising the arrangement of the groove ground contact body located at the rear of the ground clearance float from the location of following the ground contact on the groove trace by the ground clearance float. .

[0004]

According to a characteristic configuration of the present invention, the groove trace depth detecting means is provided on a groove trace grounding body that follows the ground trace on the groove trace by the ground leveling float, and on the lateral outer side of the ground leveling float. It is configured with a mud surface grounding body that is located and follows the mud surface of the field and grounds, and forms a notch in the leveling float, and arranges the groove trace grounding body in the notch, and this groove trace grounding The body is positioned within the lateral width of the ground leveling float and so as not to project rearward from the rear end of the ground leveling float, and the operation and effect thereof are as follows.

[0005]

Action In other words, paying attention to the fact that even if it is not located behind the leveling float, it can form a notch in a part of the leveling float by focusing on the fact that it can follow the groove trace of the leveling float on the ground. The ditch trace grounding body is placed, and it is located within the lateral width of the ground leveling float and is positioned so as not to project from the rear end of the ground leveling float. Since the rear end of the rear part can contact the ridge and prevent the groove trace grounding body from contacting first, and it is located in the notch even when pushing mud from the lateral side, so it is more direct than when exposed. It is rarely pushed.

[0006]

Therefore, the groove ground contact body can be protected by the ground leveling float, and the vertical operation can be improved as a sensor for the groove ground contact body as compared with the conventional case.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, an engine 4 is provided at the front of a traveling machine body 3 having a drive-type front wheel 1 and a drive-type rear wheel 2 that are operated by a steering operation, and power from the engine 4 is continuously variable. A belt tension type continuously variable transmission 5 for shifting gears is mounted, a driving seat 6 is arranged in the center of the traveling machine body 3, and a lift cylinder 7 is driven to move up and down with respect to the rear end portion of the traveling machine body 3. The seedling planting device A is connected through the mechanism 8 so that it can be rolled around the axis X in the front-rear posture to form a riding-type rice transplanter.

The groove mark depth detecting means B for detecting the groove mark depth formed by the leveling float 9 described below will be described. As shown in FIG. 3 to FIG. 5, five leveled floats 9 are arranged. Of these, the left and right intermediate floats 9B, 9B located on both sides of the center float 9A are located at the central part in the left-right direction in the field scene S. A groove trace grounding body 10 that follows the ground contact with the bottom of the groove trace G that is formed, and a mud surface grounding that follows the mud surface S of the field that is located laterally outside of the intermediate float 9B and that is not grounded by the intermediate float 9B. The body 11 is provided so as to be swingable around a lateral axis Y, and further, the groove trace grounding body 1
No. 0, a mud surface grounding body 11 is provided with a potentiometer-type groove mark sensor T that is operated in association with each other via a linking mechanism 12 to measure the depth of the groove mark G. Intermediate float 9B
In the rear part, a vertical hole is formed as a notch C, and the groove trace grounding body 10 is arranged in the vertical hole.
This hole has a wall around it, so the intermediate float 9
The mechanical strength of B is less likely to decrease.

The groove mark sensor T is, as shown in FIG.
Bearing 14 for shaft frame 13 of device A for planting seedlings
The mud surface grounding body 11 is interlockingly connected to the pipe material 15 via the first linkage mechanism 18 while being fitted and held in the pipe material 15 which is rotatably supported via the pipe material 15. On the other hand, the auxiliary shaft 1 that rotates integrally with the operation shaft Ta of the groove mark sensor T
6 is supported by a bearing 17, and the groove trace grounding body 11 is linked to the auxiliary shaft 16 through a second linking mechanism 19.
With such a linkage structure, the groove mark sensor T detects the relative displacement between the groove mark ground contact body 10 and the mud surface ground contact body 11.

As shown in FIG. 6, five leveled floats 9
Of these, the left and right ground leveling floats (hereinafter referred to as center floats 9A) are connected to the rear end of the arm 21 extending rearward from the lower part of the feed case 20 so as to be swingable around a lateral support shaft 22. In addition, by connecting the front part to the lower part of the seedling planting device A through a bending-type link 23, the front part is configured to be able to move up and down, and a rod 24 that is connected to this front position, By connecting the operation arm 26 of the potentiometer type float sensor 25 and further providing the operation arm 26 with a spring 27 for exerting a downward biasing force on the center float 9A, the amount of elevation of the front position of the center float 9A is increased. Is configured to measure. Then, the seedling planting device A is moved up and down so as to maintain the detection value of the float sensor 25 (so that the distance between the seedling planting device A and the front part of the center float 9A is constant), and the elevating control means. Are configured.

Further, during the raising / lowering control of the seedling planting apparatus A, the control sensitivity is changed by changing the value measured by the float sensor 25 as a control target. That is, the spring 27 acting on the operation arm 26
If the control target is changed to compress the
Center float 9A by increasing the urging force of
As a result of the vertical float of the front part being suppressed and the center float 9A being in the forward upward posture, the control sensitivity is lowered, and if the control target is changed in the direction to relax the spring 27, the center float 9A will move in the vertical direction. As a result, the center float 9A takes a forward and downward posture, and as a result, the control sensitivity is increased.

As shown in FIG. 2, the double-acting rolling cylinder 2 is mounted on the upper end of the vertical frame 8A at the rear end of the link mechanism 8.
8 is provided in a horizontal posture, and the rolling spring 30 is provided in a horizontal posture between the end portion of the piston rod 28A protruding left and right from the cylinder 28 and the vertically oriented frame 29 of the seedling planting apparatus A.
In addition, the seedling planting apparatus A is provided with a rolling sensor 31 as a tilt detecting means configured to measure the amount of rocking of the weight so as to measure the amount of tilt in the left-right direction.

On the upper surface of the control box 39, as shown in FIG. 7, an "absolute" position for performing absolute rolling control,
Selector switch 32 that can be switched between "ground" for performing ground rolling control and "OFF" position for releasing rolling control, changeover switch 33 for allowing automatic switching of rolling control modes, and seedling planting device during absolute rolling control A rolling angle setting device 34 for setting a rolling angle of A, a manual rolling switch 35 for forcibly performing a rolling operation, a raising / lowering sensitivity setting device 36 for setting a control sensitivity at the time of raising / lowering control of the seedling planting apparatus A, and the rolling device. The alarm lamps 37 and 38 are provided to notify the abnormality of the sensor 31 and the abnormality of the groove mark sensor T, respectively.

Based on the above-mentioned configuration as a basic configuration, the configuration of the lifting control and the rolling control will be described. As a form of performing the rolling control, in the case of parallel control to the ground, the control is performed so that the detection results of the groove mark sensor T become the same, and in the case of absolute horizontal control, the detection result of the rolling sensor 31 and the rolling angle setter 34. Control is performed so as to match the set value. In addition, as a mode for performing the lifting control,
Control is performed so that the distance between the seedling planting device A and the front part of the center float 9A is constant, that is, the detection value of the float sensor 25 is constant, and normally the average of the detection values of the left and right groove mark sensors T is used. Adjust the control sensitivity based on the value. However, when the groove trace depth detecting means B is not properly operated and the groove trace depth detecting means B is not used, the control sensitivity is set by the elevation sensitivity setting device 36.

[Other Embodiments] (1) When the cutout portion C is provided in the intermediate float 9B and the groove trace grounding body 10 is positioned in the cutout portion C, the structure of the cutout portion C is as follows. As shown in FIG. 8, the rear wall may be removed. In this arrangement, the groove trace grounding body 10 is naturally positioned within the lateral width of the intermediate float 9B, but is positioned so as not to project rearward from the rear end of the intermediate float 9B. In the configuration shown,
Although the position where the wall is removed is rearward, the notch C may be formed at a position across the lateral wall, that is, diagonally rearward. (2) In FIG. 5, the peripheral wall of the ground leveling float surrounding the groove ground contact body 10 is provided only at a position corresponding to the upper surface of the groove ground contact body 10 in the grounded state of the groove ground contact body 10. However, it may have a height corresponding to the width of the groove track grounding body 10 in the height direction. This can improve the defense against obstacles from the lateral sides. (3) The ground leveling float on which the groove trace grounding body 10 is arranged may be provided on the side floats 9C and 9C located laterally outward of the intermediate float 9B. Then, depending on the number of ground level floats 9 to be installed, it is possible to appropriately select a float to be installed. (4) The mud surface grounding body 11 preferably has the same grounding area as the groove trace grounding body 10 in consideration of the detection characteristics,
On the other hand, in order to avoid the adverse effects such as damage of the mud surface grounding body 11 due to contact with other objects, a smaller grounding area with a smaller grounding area than the groove track grounding body 10 is preferable. (5) Although the groove trace grounding body 10 and the mud surface grounding body 11 have a swinging structure, they may simply move up and down.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of drawings]

[Figure 1] Overall side view of rice transplanter

FIG. 2 is a front view of a rolling drive system.

FIG. 3 is a plan view showing the arrangement of leveling floats and the like.

FIG. 4 is a schematic diagram of a detection system of a groove mark sensor.

FIG. 5 is a configuration diagram showing an attachment state of a groove trace grounding body and a mud surface grounding body.

FIG. 6 is a side view of the front part of the central leveling float.

FIG. 7 is a plan view of the control box.

FIG. 8 is a plan view showing another embodiment of the cutout portion.

FIG. 9 is a plan view showing a conventional groove mark grounding body and a mud surface grounding body.

[Explanation of symbols]

 3 Traveling Aircraft 9 Leveling Float 10 Groove Trace Grounding Body 11 Mud Surface Grounding Body A Seedling Planting Device B Groove Trace Depth Detecting Device C Notch

Claims (1)

[Claims] 1. A pair of left and right ground leveling floats (9) are vertically movable in a seedling planting device (A) attached to a traveling machine body (3) in a freely changeable posture, and are formed by the ground leveling floats (9). A groove trace depth detecting means (B) for detecting the formed groove trace depth is provided, and the groove trace depth detecting means (B) is provided.
A rice transplanter using the detection result of the method for controlling the posture of the seedling planting device (A), wherein the groove trace depth detecting means (B) grounds the groove trace by the ground leveling float (9). Tracking groove ground contact body (10)
And a mud surface grounding body (11) located laterally outward of the leveling float (9) to follow the mud surface of the field in contact with the ground, and the leveling float (9) is provided with a notch (C). While forming, the groove trace contactor (10) is arranged in the notch (C), and the groove trace contactor (10) is within the lateral width of the leveling float (9) and the leveling float (9). )
The rice transplanter is positioned so that it does not project rearward from the rear edge.