JPH0723636A - Rice transplanter - Google Patents

Abstract

PURPOSE:To prevent trouble such as falling of seedlings in planting operation due to maneuvering maloperation from occurring. CONSTITUTION:This rice transplanter is provided by connecting a seedling planter to a mobile machine body so as to be freely driven, lifted and lowered with a hydraulic cylinder (CY), installing a float sensor 15 for sensing the ground height of the seedling planter 2 with the vertical travel based on the fluctuation in ground contact pressure, a lifting and lowering controlling means (A) for controlling the hydraulic cylinder (CY) so as to keep the seedling planter at the set ground height based on the information sensed with the float sensor 15, a sensitivity regulator 16 for regulating the detection sensitivity with the float sensor 15 according to the relative hardness of mud and a seedling planting depth regulator 21 for changing and regulating the seedling planting depth with the seedling planter. The rice transplanter is further equipped with a suppressing means (B) for the maximum speed capable of suppressing the maximum value of the travel speed of the mobile machine body to the lower side on the shallower planting side of the set planting depth with seedling planting depth regulator 21 and suppressing the maximum value of the travel speed of the mobile machine body to the lower side so long as the set value with the sensitivity regulator 16 is present at the hardest or the softest position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention connects a seedling planting device to a traveling machine body so that it can be driven up and down by a drive mechanism, and detects the ground height of the seedling planting device based on the amount of vertical movement based on fluctuations in ground pressure. Ground type ground height detecting means for controlling, the control means for controlling the drive mechanism so that the seedling planting device has a set ground level based on the detection information by the ground level detecting means, and the ground level detection The present invention relates to a rice transplanter equipped with a sensitivity adjusting means for changing and adjusting the sensitivity of detection by means according to the hardness of mud and a seedling depth adjusting means for changing and adjusting the seedling depth of the seedling planting device.

[0002]

2. Description of the Related Art In the above rice transplanter, conventionally, the sensitivity adjusting operation by the sensitivity adjusting means and the planting depth adjusting operation by the seedling planting depth adjusting means can be individually set. Regardless of the situation, the maximum value of the vehicle traveling speed was configured to be a constant value determined by the mechanical characteristics of the traveling transmission mechanism.

[0003]

However, considering the situation of seedling planting work of this seeder planting machine, when the adjustment set value of the seedling planting depth is set to the shallowest, When the planting operation was performed at a high speed close to the maximum speed, the planting operation could not be performed smoothly because the seedling insertion depth during planting was small, and the planted seedlings might fall. Also, when the mud hardness is very soft, the support of the planted seedlings is insufficient, and the risk of lodging of the seedlings is further increased. As with the soft case, the risk of seedling collapse is high. It is an object of the present invention to prevent problems such as lodging of seedlings due to erroneous operation by a worker in a field situation.

[0004]

In the rice transplanter described at the beginning, the characteristic construction of the present invention is that the traveling speed of the traveling machine body is maximized as the set planting depth by the seedling planting depth adjusting means is closer to the shallow planting side. It is provided with a maximum speed suppressing unit that suppresses the maximum value of the traveling speed of the traveling body to a lower side as the value set to the lower side is set to the hardest position or the softest position by the sensitivity adjusting unit. In point.

[0005]

[Operation] In such a field condition, the planting depth is set to the shallow planting side by the seedling planting depth adjusting means, or the mud soil is in a very hard or very soft condition. Depending on the situation, the sensitivity adjustment means is set to the hardest position or the softest position side, and when the machine is running and planting work is performed, the machine traveling speed may be mistakenly changed to the high speed side. Even if there is, the maximum value of the traveling speed is automatically suppressed to a low value, so that it is possible to prevent the aircraft from traveling at a high speed that causes the seedling to fall.

[0006]

Therefore, the maximum vehicle speed is suppressed by associating the set value of the seedling planting depth and the set value of the sensitivity adjustment according to the hardness of the mud with the set value of the traveling speed. With automatic control, it has become possible to provide a rice transplanter that can prevent problems such as tipping of seedlings during planting operation due to incorrect operation decisions.

[0007]

Embodiments will be described below with reference to the drawings. Figure 1
As shown in FIG. 2, the riding type rice transplanter is configured by connecting the seedling planting device 2 to the rear portion of the riding type traveling body via the link mechanism 1 by the hydraulic cylinder CY [an example of the driving mechanism] so as to be freely moved up and down. is there. The traveling aircraft is an engine 3 mounted on the front.
Power of the front and rear wheels 6, 7 and the seedling planting device 2 via the split pulley type belt continuously variable transmission 4, the transmission case 5
The transmission system is configured to supply to.

The continuously variable transmission 4 is configured to be operated by driving an electric cylinder 8. That is, FIG.
As shown in, the set value set by the potentiometer type speed setter 11 operated by the speed setting lever 10 provided on the aircraft control panel 9 and the stroke sensor 12 are set.
The electric cylinder 8 is drive-controlled by the control device 13 equipped with a microcomputer so that the actual gear shift operation amount detected by the above-mentioned method is matched.

During the seedling planting work, the hydraulic cylinder CY is maintained so that the ground height of the seedling planting device 2 is maintained at the set value.
Elevating control means A for driving and controlling is provided. That is,
The seedling planting device 2 is provided with a potentiometer type float sensor 15 [ground height detecting means] for detecting the amount of vertical movement based on the fluctuation of the ground pressure of the ground float 14 which is swingably supported around the rear fulcrum X1. The control device 13 controls the hydraulic cylinder C so that the detection value of the sensor 15 matches the value set by the potentiometer-type sensitivity setting device 16 [an example of the sensitivity adjusting means] provided on the body control panel 9.
The electromagnetic control valve V for Y is switched and controlled.
That is, the elevating control means A is provided in the control device 13 in the form of a control program. The sensitivity setting device 16 sets a reference vertical position on the front side of the grounding float 14, that is, a reference vertical tilting posture of the grounding float 14, according to the hardness of the mud in the field. For example, when the mud is soft, the float reference posture is set to be slightly lowered to make the detection sensitivity sensitive, and when the soil is hard, the detection sensitivity is made to be made to rise to the insensitive side.

Further, the rear fulcrum position of the grounding float 14 is vertically moved relative to the seedling planting device 2 so that the planting depth of the seedling can be changed and adjusted. That is, the fulcrum arm 17 on which the grounding float 14 is pivotally supported is rotatably supported with respect to the planted transmission case 18 about the horizontal axis X2, and the fulcrum arm 17 is supported by the electric motor 19.
Is configured to be rotated up and down. Electric motor 19
Is the actual operation amount detected by the potentiometer-type feedback sensor 20 arranged at the fulcrum part, that is, the actual planting depth is the potentiometer-type planting depth setting device 21 [seedling planting depth] provided on the control panel 9. The control device 13 is configured to perform drive control so as to match the set value according to one example of the height adjusting means].

As the planting depth set by the planting depth setter 21 is closer to the shallow planting side, the maximum value of the traveling speed of the traveling machine body is suppressed to a lower side, and the set value by the sensitivity setter 16 is the hardest. The maximum speed suppressing means B for suppressing the maximum value of the traveling speed of the traveling machine body to the lower side is provided at the position or the softest position. That is, as shown in FIG. 3, the controller 13 sets the maximum speed set by the continuously variable transmission 4 to 1.5 meters per second from the set value by the planting depth setter 21 and the set value by the sensitivity setter 16. The high-speed region H that can be set up to and the deceleration region L that suppresses the set maximum speed to 1.0 meter per second are set to be switched, and the control state for the electric gear shift operation cylinder 8 is switched.
In the deceleration region L, the set planting depth is on the shallow planting side,
In addition, this is a region where the setting value by the sensitivity setting device 16 is on the side of the hardest position “7” or the softest position “1”. Therefore, the maximum speed suppressing means B is provided in the control device 13 in advance in the control program format.

[Other Embodiments] Instead of switching the maximum vehicle speed that can be set in two steps as in the above embodiment, as shown in FIG. 4, the maximum vehicle speed is linear as the planting depth is shallower. The maximum vehicle speed linearly or stepwise as the sensitivity set by the sensitivity setter 16 is at the hardest position "7" or the softest position "1". You may.

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

[Brief description of drawings]

[Figure 1] Side view of rice transplanter

FIG. 2 is a control block diagram.

[Fig. 3] Control characteristic diagram

FIG. 4 is a control characteristic diagram of another embodiment.

[Explanation of symbols]

 2 Seedling planting device 15 Ground height detecting means 16 Sensitivity adjusting means 21 Seedling planting depth adjusting means A Elevating control means B Maximum speed suppressing means CY Drive mechanism

Claims (1)

[Claims] 1. A seedling planting device (2) is connected to a traveling machine body by a drive mechanism (CY) so as to be able to move up and down, and the ground movement of the seedling planting device (2) is based on vertical movement amount based on fluctuation of ground pressure. Ground type ground height detecting means (15) for detecting the height, and the drive mechanism so that the seedling planting device (2) has a set ground level based on the detection information by the ground height detecting means (15). (CY) control means for controlling (CY), sensitivity adjusting means (16) for changing and adjusting the sensitivity of detection by the ground height detecting means (15) according to the hardness of the mud, and the seedling planting device ( A rice transplanter equipped with a seedling planting depth adjusting means (21) for changing and adjusting the seedling planting depth according to 2), wherein the planting depth set by the seedling planting depth adjusting means (21) is a shallow planting side. The maximum value of the traveling speed of the traveling aircraft is suppressed to the lower side. Further, the rice transplanter equipped with the maximum speed suppressing means (B) for suppressing the maximum value of the traveling speed of the traveling body to the lower side as the set value by the sensitivity adjusting means (16) is at the hardest position or the softest position. .