JPS6265612A - Up-and-down movement controller of rice planter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vertical movement control device for a rice transplanter.

[Prior art] As a vertical movement control device for rice field agricultural machinery such as rice transplanters, hydraulic valves of the left and right hydraulic drive devices are controlled in response to changes in ground pressure of a pair of left and right ground contact bodies provided on the sides of the machine. Some models are designed to lower the rice field wheels as appropriate by switching between the two to keep the aircraft level.

[Problems to be Solved by the Invention] However, in the conventional one-stroke downward motion control device described above, the hydraulic valve does not switch unless the ground pressure of the grounding body reaches a certain value or more. The aircraft tilted to some extent before it activated. By the way, especially in the case of a rice transplanter, it is equipped with a seedling tank that moves back and forth in the horizontal direction, so if the seedling tank moves to one side and covers over, the weight of the seedling tank itself and the load of the seedlings will cause the machine to The problem was that the weight balance of the aircraft would be disrupted, causing the aircraft to tilt significantly laterally before the vertical motion control system was activated.

[Means for Solving the Problems] In order to solve the above problems, the present invention has the following configuration. No. 11 lower movement control of the rice transplanter according to the present invention! The II device consists of a pair of water draining wheels on the left and right, a hydraulic drive device on the right side for individually feeding the water ff1 wheels, a grounding body provided on the side of the machine body, and a seedling loading device. When the aircraft is tilted, the valve of the hydraulic drive device is switched depending on the change in the ground pressure of the grounding body, and the hydraulic drive device expands and contracts. water [
Set the four wheels, keep the machine horizontal, and activate the vertical motion control of the rice transplanter, which is connected to the rice transplanter. 1- I also forgot the sensitivity adjustment device #h
i'li.

[Effect 1: If the bacteria tank moves to one side, the sensitivity of the hydraulic valve switching device installed on the grounding body on that side will be affected, and even a slight tilt of the aircraft will cause the hydraulic valve of the drive device to switch. It becomes like this. Therefore, even if the seedling tank moves sideways and the balance of the back of the aircraft is lost, the aircraft can always maintain a horizontal position.

[Examples] Examples shown in the drawings will be described below. This 1T1 transplanter 1 has a pair of right side 1J feet 3, 3' on the upper part of the front side of the machine body 2, and water is provided on each side of the 70 feet. [11 wheels 5.5'hSR'J (]
It is being At the front of fuselage 2; 5t [Tomoki 7 or 8 tank]
A transmission case 8 of the planting portion and a handle 9 fixed to the transmission case at the base are provided at the rear end. Then, add 1 to the bottom of the planting area, and 1 to the rear flow 1 to the center.
0 and a litif on the side [1-to 11°11' or 6
endured). These 7■-t10.11°11'(
The rear part is attached to the fuselage 2 by a rotating shaft 12, and the front part is suspended by an expansion/retraction link 13 (which can be moved up and down within a predetermined range. The transmission case 15 has a drive shaft 16 that protrudes to the right. The rotational power from the prime mover 7 is transmitted through the transmission n in the drive shaft 1.
At both ends of 6, there is a pair of left and right blank cases 17.17
Sprocket wheels 17a, 17 housed within
A is being kicked. The chain case 17 is attached to the end of a rotatable cylindrical housing 18 that houses the drive shaft 16, and the axle 19 of the paddy wheel 5 (5') is attached to the other end of the chain case 17. A sprocket wheel 17b attached to these axles 19 is connected to the sprocket wheel 17a by a link 21, so that rotational power from the drive shaft 16 is transmitted to rotate the wheels 5, 5'. It has become.

A seedling tank 23 and a planting rod 25 are provided in each seedling planting section. Place the seedling tank 23 in the receiving frame 26 so that it is on the front side or at a low level.
The handlebar 9 is provided at an angle so that it can reciprocate from side to side along a guide rail 27 attached to the middle part of the handle 9. A claw 25 is attached to the tip of the planting rod 25.
A is provided, and during the rice planting work, the claws 25a move up and down in an elliptical orbit to divide and take out the seedlings from the seedling mat held in the seedling tank 23 and plant them in the field. has been done.

Hydraulic cylinder 30°30 as a drive device for lowering the wheels 4
' are placed on both sides of the fuselage 20, and their respective bases are attached to both ends of the balances 4 and 31, and the respective piston eyes are Do 30a
, 30a' are connected to the tip of an arm 18H that protrudes from the top of the housing 18 for the drive shaft 16. The balance rod 31 is connected to the front end 1 of the engine stand 7a on which the prime mover 7 is mounted so as to be rotatable back and forth about the center thereof as a fulcrum. These hydraulic cylinders 30.3
0' (Yo), it expands and contracts by the hydraulic pressure from the hydraulic system 32 installed in the center of the fuselage, and the rice paddy wheels 5, 5' are moved through the rotation of the chain case 17, 17.

The sensor flow 1-3 (3') is for detecting unevenness of the tiller, and its rear part is attached to the machine body 2 so as to be able to move up and down, and its front part is supported in a suspended state by a detection rod 40. . The upper end of the detection rod 40 is pivotally connected to the middle part of a valve arm 42 whose front end is pivotally connected to the body 2 and is vertically rotatable. The free end of the valve arm 42 is connected to the connection [1
It is connected to one end of a generally U-shaped rotating arm 45 via a bolt 44 . The other parts of the rotating arm 45 are
Valve shaft 47 (47') of switching valve V (V') of hydraulic system 32
is fixed to. Note that the rotating arm 45 is pulled rearward by a spring 59 that is stretched between it and a mounting plate 58 that is i2 digits on the body side.

In addition, glue float 11.11' is used as a grounding body (
A switching device @61°61' for switching the valves v and v', and a sensitivity adjustment device 60 for improving the switching sensitivity of L7J on that side when one side of the seedling tank is moved are installed (
] This switching device 61 (61') includes a horizontal par 62 (62') installed horizontally in the middle of the fuselage, and an arm member 63 fixed to the horizontal par 62 (62').
64, and a quick-connection rod 6 that connects the tip of the arm member 63 and the front end of the side float 11 (11').
5 constitutes a ground pressure detection section 66, and the arm member 6
Switching wire 1767 (6
7') is tightly attached at one end. These switching wires 67°, 67') are connected to the 11!2 ea section or the opposite side surface of the seedling tank 230 via the rotating arms 45 on each side. Further, the outer 68 (68') of the wire 67 (67') is provided at the intermediate part of the rotating arm 45 (
It is attached between a rotatable pin 69 and a 69-digit support plate 70 at both ends of the receiving frame 26 of the seedling tank.

In the figure, 72 is a hydraulic tank, 73, 73' is a hydraulic pump, and 74 is a drive shaft for transmitting rotational power to the hydraulic pump.

The hydraulic system 32 includes a pair of switching valves v, v' on the right side, and these switching valves v, v' are connected to hydraulic cylinders 30, 30' on their respective sides. Therefore, the left and right hydraulic cylinders 30, 30' are the switching valves V.

By switching V', the wheels 5 and 5' are independently extended and contracted, and the wheels 5 and 5' are individually moved up and down through the rotation of the chain case 17 and 17.

When this rice field 41i'1ta1 is used in a rice field, the wheels 5
By transferring ゜5' from II board 1-, the fuselage 2 moves in the forward direction. At this time, each float slides along the topsoil surface due to buoyancy. Here, for example, when the tiller becomes lower, the machine body 2 descends, but the foot [1-] remains at a constant height, so the sensor float 3 (3')
This means that the aircraft has moved upward relative to aircraft 2. η, the detection rod 40 is lifted and the valve arm 42 is connected []
valve shaft 47 (47') via rotary arm 45
Turn in the direction of arrow X.

Therefore, the switching valve V (Vi of the hydraulic system M32) is switched in the direction of extending the hydraulic cylinders 30 (30') on each side, rotating the chain case 17 downward and lowering the wheel 5 (5'). On the other hand, when the tiller becomes higher, the sensor float 3 (3') moves downward, so the valve shaft 47 (47') is turned in the counter-arrow "1" X direction, and the hydraulic cylinder 30 (30') contracts and raises the wheel 5 (5').The up and down movement of the wheel causes the sensor float 3 (3') to rise.
) reaches a predetermined height with respect to the aircraft, that state is maintained.

Next, during the planting operation, if the seedling tank 23 moves to one side, for example to the left, the weight balance of the machine becomes biased to the left, and the machine tends to lean to the left. By the way, due to the movement of the seedling tank 23, the seedling tank 23
Since the switching wire 67 connected to the thigh side is pulled, the tension of this wire 67 forces the left side float 11 downward. As a result, the ground pressure of the site float 11 increases to some extent, creating a tense state in which it responds sensitively to changes in the ground contact 1 that are greater than that. In this state, for example, if the 11th board on the right side becomes lower, the side float 1
As a result, a strong force is generated that tries to pull the switching wire 67 backward through the detection section 66. However, since the position of the sacral end of the wire 67 is restricted, it cannot be moved by the wire alone, and the outer 68 is stretched. the result,
The rotating arm 45 is rotated in the direction of arrow X, and the hydraulic cylinder 3
0 is extended and the left wheel 5 is lowered. Conversely, when the seedling tank 23 moves to the right side, the right switching device 6
1' sensitivity has been improved, making it possible to respond sensitively to changes in the height of the tiller. That is, when the seedling tank 23 moves to one side, the ground pressure detection sensitivity of the switching device on the moved side improves, and the rotary valve 45 on that side is quickly switched. Therefore, even if the weight balance of the machine body becomes unbalanced due to the movement of the seedling tank, the machine body is prevented from tilting to the left or right due to the inclination of the tiller, and planting work can always be carried out in a horizontal state.

[Effect Song] As is clear from the above explanation, the vertical motion control device of the rice transplanter according to the present invention is installed on the heavier side when the seedling tank moves to one side and the weight balance of the machine is disrupted. The ground pressure detection sensitivity of the switching device on the side float has been improved, allowing the rice paddy wheels on that side to be lowered quickly.

Therefore, regardless of the horizontal movement of the seedling tank, the machine remains horizontal at all times.

[Brief explanation of the drawing]

FIG. 1 is a side view of an example of a rice transplanter equipped with a vertical movement control device according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is an enlarged view of main parts. 1...Tue Il! I2...Airframe 3,3'...Sensor float 5,5'...Wheel 11.11'・
...Side float 17...Chain case 23...
・Seedling tank 30.30'... Cylinder (hydraulic drive device) 31... Balance rod 32... Hydraulic device 45.
...Rotating arm 60...Sensitivity adjustment device 61, 61'
...Switching device 67, 67' ...Switching device 7
68°68' ・・・Outer

Claims (1)

[Claims] (1) A pair of left and right paddy wheels, a pair of left and right hydraulic drive devices that raise and lower the paddy wheels individually, and a grounding body installed on the side of the machine, which loads seedlings and reciprocates in the lateral direction. When the aircraft is tilted, the valve of the hydraulic drive device is switched depending on the change in the ground pressure of the grounding body, and the hydraulic drive unit expands and contracts to raise and lower the paddy wheels and keep the aircraft horizontal. The vertical movement control device for a rice transplanter configured as above, further comprising a sensitivity adjustment device for improving ground pressure detection sensitivity for switching the hydraulic valve on the side to which the seedling tank has moved. Device.