JPS586443B2 - Seedling planting machine running device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a walking seedling toucher.

SUMMARY OF THE INVENTION An object of the present invention is to prevent erroneous sensing by a sensor for controlling the vertical movement of a traveling wheel.

The elevating motion control device for the running wheels of conventional seedling transplanters was developed in 1977.
As described in Japanese Patent No. 47169, etc., the structure was such that a leveling float located on the outside of the running wheels was used as a sensor to operate the elevation control device for the running wheels.

Therefore, if the machine tilts even slightly to the left or right during seedling planting, the ground pressure of the soil leveling float will change, causing the traveling wheels to descend even though the paddy field is not deep, or conversely, the paddy field becoming shallower. This has the disadvantage that the seedling planting depth is not constant due to malfunctions such as moving the traveling wheels up even when the seedlings are not being planted.

The present invention prevents the above-mentioned defects and includes: a. The prime mover is installed at the front of the machine frame.

b. A control handle, seedling tank, and seedling cutting device are installed at the rear of the machine frame.

C. Each front end of the vertical power transmission case is pivotally supported on both left and right sides of the machine frame at the intermediate position between the front and back.

d. Traveling wheels are respectively fixed to the rear end of the transmission case.

e. The machine frame is equipped with a travel wheel vertical movement device consisting of a hydraulic cylinder and a hydraulic piston.

f. The machine frame is provided with an actuating device for actuating the traveling wheel vertical movement device.

g. A ground pressure sensor is provided at an intermediate position between a pair of left and right running wheels.

h. The ground pressure sensing body and the actuating device are connected by a connector.

That is.

To explain with the drawing, 1 is a machine frame of a seedling transplanter, a prime mover 2 is attached to the front part, and a seedling tank 4 and a control handle 5 are attached to the rear part.

6 is a planted transmission case.

Reference numeral 7 denotes a seedling inserting device, which is provided at the bottom of the left and right sides of the planting transmission case 6, and is used to divide the seedlings in the seedling tank 4 and transplant them onto the soil surface.

The seedling tank 4 has its base fixed to the rear part of the planting transmission case 6, and is attached to the front side of a control handle 5 extending toward the rear upper part in a direction along the handle 5, that is, the front part is lower and the rear is upper. It is tilted and supported so as to be horizontally movable, and is configured to be reciprocated and laterally moved in the left and right direction by an operating mechanism within the planting transmission case 6.

Reference numeral 8 denotes running wheels, which are attached to rear ends of upper and lower power transmission cases 9 and 9, respectively, whose front ends are pivoted to the lower portions of both left and right sides of the travel transmission case 3, which is provided at an intermediate position between the front and back of the machine frame 1. It is mounted on a shaft.

The running wheels 8 are located at an intermediate portion of the machine frame 1 in the longitudinal direction.

Reference numeral 10 indicates a transmission shaft portion of the transmission case 9, and reference numeral 11 indicates a wheel shaft.

Reference numeral 12 denotes a ground leveling float, the rear end of which is pivotally attached to the rear end of the machine frame 1 by a pin 13, and the front part of the ground leveling float 12 is formed to move vertically around the pin 13.

Reference numeral 14 denotes a bending link mechanism attached between the front part of the ground leveling float 12 and the machine frame 1, and a spring 15 is provided to constantly bias the link mechanism 14 in the direction of extension.

The ground leveling float 12 is provided at the middle position between the left and right running wheels 8, and a through hole 16 in the vertical direction is provided at the middle position in the front and rear direction. The body 17 is pivoted by a horizontal shaft 18.

Therefore, the sensing body 17 is constantly urged to move downward by the elasticity of the spring 19 between the running wheels 8, and moves upward when it receives earth pressure.

20 is a hydraulic cylinder; 21 is a hydraulic piston; the rear end of the hydraulic piston 21 and an arm 22 projecting upward from the transmission case 9 are connected by a rod 23;

The hydraulic cylinder 20, hydraulic piston 21, arm 2
2 and rod 23 are an example of a traveling wheel vertical movement device.

24 is the main pulley of the prime mover 2, 25 is the receiver pulley of the hydraulic system,
A belt 26 is loosely stretched between the original pulley 24 and the receiver pulley 25, and a tension pulley 2 is attached to the belt 26.
7.

The original pulley 24, receiver pulley 25, belt 26, and tension pulley 27 are an example of an actuating device for the traveling wheel vertical movement device.

The support arm 28 of the tension pulley 27 and the sensing body 17 are connected by a wire 29.

Next, we will discuss the effect.

When the prime mover 2 is started, the pair of left and right running wheels 8 rotate and the machine moves forward, and when the machine is operated while holding the control handle 5 with both hands, the seedling device 7 inserts seedlings in the seedling tank 4 onto the ground leveled by the leveling float 12. Plant one plant at a time in the field.

At this time, even if the machine frame 1 tilts to the left or right because one of the running wheels 8 on either the left or right happens to sink into the depth or ride on a convex part, the sensing body 17 is located between the running wheels 8 on the left and right. Due to its position, it hardly moves up and down, so wire 2
The tension pulley 27 is not actuated via the tension pulley 9.

However, when the paddy field suddenly becomes deeper, the running wheels 8 on both the left and right sides sink into the depth at the same time, and as a result, the entire machine sinks together with the leveling float 12, and the sensing body 17 senses the earth pressure and increases the elasticity of the spring 19. It rotates counterclockwise about the shaft 18 against the

Then, since the wire 29 is loosened, the tension pulley 27 is pulled up by the spring 30, tensioning the belt 26 and rotating the receiver wheel 25.

Then, oil is sent into the hydraulic cylinder 20, causing the hydraulic piston 21 to protrude rearward, and the arm 22 is rotated rearward via the rod 23.

Therefore, the transmission case 9 rotates clockwise around the transmission shaft portion 10, lowers the running wheels 8, and sets the relative heights between the running wheels 8 and the ground leveling float 12 to the optimum position.

Next, when the paddy field suddenly becomes shallow, both the traveling wheels 8, 8 move upward, and therefore the machine frame 1 moves upward together with the leveling float 12.

Then, the sensing body 17 becomes lighter and rotates clockwise by the elasticity of the spring 19, so that the rear end of the support arm 28 is pulled up via the wire 29, and the tension pulley 27 is separated from the belt 26.

As a result, the belt 26 loosens and the main pulley 24 only spins idly, which not only prevents the receiving pulley 25 from rotating, but also causes the support arm 28 to rotate as described above, causing the hydraulic cylinder to move (not shown). The oil in 20 acts to drain, so the hydraulic piston 21 moves forward and rotates the transmission case 9 counterclockwise via the rod 23, causing the running wheel 8 to move upward. The relative height between the ground leveling float 12 and the ground leveling float 12 is set at an optimum position.

A conventionally known walking seedling planting machine is configured such that a sensing body is provided on the outside of a running wheel, and the running wheel is adjusted up and down by the sensing body.

Therefore, even though the paddy field was not actually deep, if one of the wheels happened to go into the depths, the aircraft would tilt to the left or right, which caused the sensor to activate and cause the traveling wheels to move up and down. .

However, the present invention a. The prime mover is installed at the front of the machine frame.

b. A control handle, seedling tank, and seedling cutting device are installed at the rear of the machine frame.

c. Each front end of the vertical power transmission case is pivotally supported on both left and right sides of the machine frame at the intermediate position between the front and back.

d. Traveling wheels are respectively fixed to the rear end of the transmission case.

e. The machine frame is equipped with a travel wheel vertical movement device consisting of a hydraulic cylinder and a hydraulic piston.

f. The machine frame is provided with an actuating device for actuating the traveling wheel vertical movement device.

g. A ground pressure sensor is provided at an intermediate position between a pair of left and right running wheels.

h. The ground pressure sensing body and the actuating device are connected by a connector.

Since this is a walking seedling planter with the following requirements, even if one of the running wheels sinks into the depths or runs over a convex part, the sensor will hardly operate, which will prevent malfunctions. Instead, the sensing body operates only when the overall depth of the paddy field changes, resulting in the effect of operating correctly.

[Brief explanation of the drawing]

The example diagram is a partially longitudinal side view. Explanation of symbols, 1... Seedling planting machine frame, 2...
・Motor, 3... Travel transmission case, 4...
...Seedling tank, 5...Control handle, 6...
... Planting transmission case, 7 ... Seedling insertion device, 8.
...Traveling wheel, 9...Vertical power transmission case, 10...Transmission shaft, 11...Wheel axle, 12...Grading float , 13... pin, 14... bending link mechanism, 15...
・Spring, 16...Through hole, 17...Sensor, 18...Horizontal axis, 19...Spring,
20...Hydraulic cylinder, 21...Hydraulic piston, 22...Arm, 23...
・Rotsudo, 24...Original model, 25...
Receiving wheel, 26... Belt, 27... Tension pulley, 28... Support arm, 29...
... wire, 30 ... spring.

Claims (1)

[Scope of Claims] 1. A walking seedling planting machine comprising the following requirements a to h. a. The prime mover is installed at the front of the machine frame. b. A control handle and a seedling tank are installed at the rear of the machine frame. c. Each front end of the vertical power transmission case is pivotally supported on both left and right sides of the machine frame at the intermediate position between the front and back. d. Traveling wheels are respectively fixed to the rear end of the transmission case. e. The machine frame is equipped with a travel wheel vertical movement device consisting of a hydraulic cylinder and a hydraulic piston. f. It is convenient to provide an actuating device for actuating the traveling wheel vertical movement device. g. A ground pressure sensor is provided at an intermediate position between a pair of left and right running wheels. h. The ground pressure sensing body and the actuating device are connected by a connector.