JPH07112371B2 - Seedling planting machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a seedling planting machine with a rolling control device that appropriately corrects the inclination of a machine body.

[Conventional technology and its problems]

As a conventional technique of this kind, as shown in Japanese Utility Model Publication No. 56-2811, a sensor is provided between the left and right traveling wheels to detect the inclination of the aircraft by grounding it on the soil surface and detecting the inclination of the aircraft using the sensor. There is a two-row walking type seedling planting machine that controls the rolling of the machine.

When such a rolling control is used for a four-row walking type seedling planting machine having left and right side floats on the outer side of the left and right walking wheels, the side float on one side abuts or rides up on the ridge. When the body tilts, the control to correct the tilt works to control the tilt of the body to a high position on the riding side, and the planting depth of the seedling becomes extremely shallow, or in the worst case, , The seedlings could not be planted in the air.

On the other hand, as shown in Japanese Examined Patent Publication No. 58-32928, there is a four-row planting walking type seedling plant that controls rolling with a side float. Due to the effect of preventing the leaning, the main body portion is located at the rear of the airframe from the grounding point of the wheel. Therefore, the detection of the machine body tilt in the side float is always delayed, and since the actuator for controlling is a hydraulic cylinder, its operation is slow, and due to the synergistic factors of both, proper control cannot be performed. It was

Therefore, as shown in Japanese Utility Model Publication No. 56-2811, "a sensor that detects the tilt of the airframe by contacting the soil surface between the left and right traveling wheels"
It is conceivable that the above-mentioned Japanese Patent Publication No. 58-32928 and "the one that controls the rolling by the side float" are gathered together, but if they are simply gathered together, as shown in FIG. When the sensor float a rides on the ridge, the aircraft tilts, and the central sensor float b on the side of the ridge is hung in the air apart from the mud surface. To descend.
Therefore, although the right sensor float a riding on the ridge moves upward, the central sensor float b on the side riding on the ridge descends, and both output control signals which are completely opposite to each other. The same phenomenon as described in the subject for the above occurs, and proper seedling work cannot be performed.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the present invention switches the hydraulic switching valve 14 by the body inclination detection of the sensor 3 which detects the inclination of the body provided on the front part of the body at the left and right central portions of the left and right traveling wheels 1. In the seedling planting machine, in which the hydraulic cylinders 12 are operated to change the relative vertical heights of the left and right traveling wheels 1 to control the rolling of the machine body, the soil surface is grounded to the left and right outer positions of the left and right traveling wheels 1 to the soil surface. A left and right sensor float 4 for controlling the rolling of the machine by changing the relative vertical height of the left and right traveling wheels 1 by operating the hydraulic cylinder 12 by operating the hydraulic pressure switching valve 14 by the vertical movement of the front portion due to the pressure fluctuation. In addition, when the front part of the left and right sensor float 4 moves upward, the body on the side where the left and right sensor float 4 moves up is raised regardless of the detection state of the sensor 3. To rolling control aircraft countercurrent is obtained by a seedling planting machine according to claim.

[Advantageous effects of the invention]

According to the present invention, the sensor 3 for detecting the inclination of the vehicle body provided on the front side of the vehicle body on the left and right central portions of the left and right traveling wheels 1 detects the vehicle body inclination and switches the hydraulic pressure switching valve 14 to operate the hydraulic cylinder 12 to operate the left and right sides. In a seedling planting machine that controls the rolling of the machine by changing the relative vertical height of the traveling wheel 1, the front and bottom of the front part is grounded by the ground surface being touched on the soil surface at a position outside the left and right traveling wheels 1. The left and right sensor floats 4 for controlling the rolling of the machine by dynamically changing the hydraulic switching valve 14 and operating the hydraulic cylinder 12 to change the relative vertical heights of the left and right traveling wheels 1 are provided. When performing seedling planting work, the hydraulic switching valve 14 is switched by the sensor 3 provided on the front part of the machine body and the left and right sensor floats 4 located on the left and right outer sides of the left and right traveling wheels 1 to provide quick and responsive operation. Appropriate rolling control can be performed.

In addition, when the front part of the left and right sensor float 4 moves upward, no matter what the detection state of the sensor 3, the rolling control of the vehicle body in a direction in which the vehicle body on the side where the left and right sensor float 4 has moved upward becomes higher is controlled. Therefore, at the time of ridge planting, the left and right sensor floats 4 close to the ridges can properly perform the rolling control, and even if the left and right sensor floats 4 get on the ridges, the sensor float 4 before the ride Even if the sensor 3 is in any detection state due to the upward movement of the part, the left and right sensor floats 4
Since the rolling control of the machine body in the direction in which the machine body on the upside of the machine becomes higher is possible, the work of planting seedlings can be performed satisfactorily without falling into the inability to run, and the problems of the conventional example can be appropriately solved.

〔Example〕

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

A traveling transmission case 5 is provided on the front side of the machine body 2, an engine 6 is mounted on the front of the transmission case 5, and a planted transmission case 7 is provided on the rear side of the transmission case 7. Is attached to the base of the handle 8.

A base of a chain case 9 is rotatably pivoted on both sides of the traveling transmission case 5, and left and right traveling wheels 1 are axially mounted at the rear end of the chain case 9 for movement.

On the left and right sides of the lower part of the planted transmission case 7, a seedling rod 10 which swings up and down via a crank mechanism, and a rearwardly tilted support along the upper part of the handle 8 are movably supported. A seedling tank 11 is provided, and the seedling tank 11 is connected to a reciprocating lateral movement mechanism in the planted transmission case 7 via a moving rod and an arm.

A central sensor float 3 as a sensor for detecting the inclination of the fuselage is provided on the left and right below the front of the machine body 2, and on the lower rear side at the left and right outside positions of the left and right traveling wheels 1 and below the center sensor float 3. Left and right sensor float 4
The central sensor float 3 and the left and right sensor floats 4 are rotatably pivotably attached to each other, and the front part is vertically rotatably attached. Therefore, when an increase in the ground pressure acts on the central sensor float 3 and the left and right sensor floats 4 at the same time, the timing at which the front part of the left and right sensor floats 4 moves upward is earlier.

A base of a hydraulic cylinder 12 is fixed to both sides of the front part of the machine body 2, and a tip of a piston is connected to an arm integrally provided on the base of the chain case 9.

Reference numeral 13 denotes a hydraulic pump, which is provided with a hydraulic pressure switching valve 14, to which a valve arm 15 having an L-shaped side view is fixed.

One end of the valve arm 15 and a tip end of a swing arm 16 rotatable about a pivot are connected by a rod 17,
A spring 18 is provided at the other end of 15, and the spring 18 urges the valve arm 15 to rotate so that the hydraulic pressure switching valve 14 is constantly switched to the oil discharge side.

Actuating wires are provided in front of the left and right central sensor floats 3.
One end of the wire 19 is connected to the operating rod 20 provided at the other end of the wire 19.
Is provided close to the left and right swing arm 16.

Further, one end of an actuating wire 21 is connected to the front part of the left and right sensor float 4, and an actuating rod 22 provided at the other end of the wire 21 is provided close to the left and right swing arm 16, and these sensor floats 3, 4 The upward movement causes the operating rods 20 and 22 to project to rotate the swing arm 16 upward, push up the rod 17 to rotate the valve arm 15, and switch the hydraulic switching valve 14 to the oil feeding side. The mechanism.

When the engine 6 power-transmits each part to move the machine body 2 forward, the central sensor float 3 and the left and right sensor floats 4 slide on the soil surface.

The machine body 2 tends to incline due to the depth variation of the tiller stepped on by the left and right traveling wheels 1, but when the tiller depressed by the left traveling wheel 1 becomes deep, the left wheel 1 does not come into contact with the tiller. Therefore, the aircraft is tilted in the direction in which the left side becomes lower, and the front parts of the left center sensor float 3 and the left sensor float 4 are moved upward to detect high pressure with the soil surface, and this detection is performed via the operating wires 19 and 21. The operating rods 20 and 22 are projected to rotate the swinging arm 16 upward to rotate the valve arm 15 via the rod 17 to switch the hydraulic switching valve 14 to the oil feeding side, and the hydraulic pump 13 to the hydraulic cylinder. Oil is sent to 12, the piston is projected, and the chain case 9 is rotated downward to lower the left traveling wheel 1. When the wheel 1 comes into contact with the tiller to support the body, the left center sensor float 3
Then, the upward movement of the left sensor float 4 is returned to the proper position, and the hydraulic pressure switching valve 14 is switched to the shut-off side, so that the wheel 1 stops descending.

When the cultivator on which the right traveling wheel 1 depresses becomes shallow, the right side of the machine body 2 moves upward and the right central sensor float 3 and the right sensor float 4 both hang down and move downward to reduce the pressure on the soil surface. Detected, and this detection causes the operating rod 20,22
The valve arm 15 is pulled by the spring 18 to rotate, the hydraulic pressure switching valve 14 is switched to the oil drain side, the hydraulic pressure of the hydraulic pressure switching valve 14 is released, the oil is drained, and the piston is retracted. And the right wheel 1 is raised. When these sensor floats 3 and 4 detect an appropriate pressure with respect to the soil surface, the rotation of the valve arm 15 causes the hydraulic pressure switching valve 14 to switch to the shutoff side, and the right wheel 1 stops rising.

In this way, the pressures on the soil surface are detected by the left and right central sensor floats 3 and the left and right sensor floats 4, and the pressure detection side parts are raised and lowered to supply the airframe 2 from the seedling tank 11 while controlling the rolling. The seedlings are separated by the seedling rods 10 and are planted on the soil surface leveled by the floats 3 and 4.

Then, in particular, the vehicle body inclination detection of the sensor 3 which detects the inclination of the vehicle body provided in the front portion of the vehicle body at the left and right center portions of the vehicle body of the left and right traveling wheels 1 switches the hydraulic pressure switching valve 14 to operate the hydraulic cylinder 12 to operate the left and right sides. In a seedling planting machine that controls the rolling of the machine by changing the relative vertical height of the traveling wheel 1, the front and bottom of the front part is grounded by the ground surface being touched on the soil surface at a position outside the left and right traveling wheels 1. The left and right sensor floats 4 for controlling the rolling of the machine by dynamically changing the hydraulic switching valve 14 and operating the hydraulic cylinder 12 to change the relative vertical heights of the left and right traveling wheels 1 are provided. When carrying out seedling planting work, the hydraulic switching valve 14 is switched by the sensor 3 provided on the front part of the machine body and the left and right sensor floats 4 located on the left and right outer sides of the left and right traveling wheels 1 for quick and responsive operation. Good and proper rolling control can be performed.

In addition, when the operating rod 22 projects due to the upward movement of the front part of the left and right sensor float 4 and the swing arm 16 is rotated upward to switch the hydraulic pressure switching valve 14 to the oil feeding side for control, the central sensor is used. Even if the float 3 moves downward and the operating rod 20 is retracted, the swing arm 16 is already pushed up by the operating rod 22, so that the swing arm 16 does not rotate downward, and At the time of vegetation, the left and right sensor floats 4 close to the ridges can be properly controlled for rolling, and even if the left and right sensor floats 4 ride on the ridges, the sensor floats 4 that were caught in the early stages of the ride will be used to move the sensor 3 No matter what the detection state is, the rolling control of the left and right sensor floats 4 in the direction in which the upper moving body of the left and right sensors floats up, so that the planting work of seedlings can be carried out satisfactorily without falling down. Playable.

The vertical rotation range of the front part of the left and right sensor float 4 in the above example may be adjustable as in the second embodiment. That is, an adjusting lever 24 is provided rotatably up and down on the front side of the lower end of a side frame 23 that interlocks the seedling rods 10 provided on both sides of the planted transmission case 7, and the adjusting lever 24 is provided in a locking hole 26 of an adjusting plate 25. The pin can be inserted and fixed. The tip of the adjusting lever 24 and the receiving plate 27 are connected by the outer of the actuating wire 21, one end of the inner is fixed to the front part of the left and right sensor float 4, and the actuating rod 22 at the other end is the left and right swing arm 16 It is provided close to.

When the adjusting lever 24 is moved downward and the pin is inserted into the locking hole 26 and fixed, the front parts of the left and right sensor floats 4 are moved downward, and the sensing position for detecting the ground pressure with the soil surface is accelerated, and the adjusting lever is moved. When 24 is moved up and the pin is inserted into the locking hole 26 and fixed,
The front parts of the left and right sensor floats 4 are moved upward, and the sensing position for ground pressure detection is delayed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention. FIG. 1 is a side view of an essential part, FIG. 2 is a perspective view of the essential part of another embodiment, and FIG. FIG. 4 is a plan view and FIG. 4 is an operation explanatory view showing a conventional example. In the figure, reference numeral 1 is a left and right traveling wheel, 2 is a body, 3 is a central sensor float, 4 is a left and right sensor float, 12 is a hydraulic cylinder, and 14 is a hydraulic switching valve.

 ─────────────────────────────────────────────────── --- Continuation of the front page (56) Reference JP-A-61-31007 (JP, A) JP-A-56-131305 (JP, A) JP-A-54-85917 (JP, A) JP-A-57- 102102 (JP, A) Actual development Sho 55-83915 (JP, U) Special public Sho 58-32928 (JP, B2) Special public Sho 59-47563 (JP, B2) Actual public Sho 56-2811 (JP, Y2)

Claims (1)

[Claims] 1. A hydraulic switching valve 14 is switched to operate a hydraulic cylinder 12 by detecting a machine body inclination of a sensor 3 which detects the inclination of a machine body provided on the front side of the machine body on the center side of the machine body of the left and right traveling wheels 1. In a seedling planting machine that controls the rolling of the machine by changing the relative vertical height of the left and right traveling wheels 1, the soil surface is grounded at a position outside the left and right traveling wheels 1 on the soil surface, and the front part of the front surface changes due to the fluctuation of the ground pressure. The left and right sensor floats 4 are provided for switching the hydraulic pressure switching valve 14 by vertical movement to operate the hydraulic cylinders 12 to change the relative vertical heights of the left and right traveling wheels 1 to control the rolling of the machine body. When the front part of 4 has moved upwards, no matter what the detection state of the sensor 3, the rolling control of the left and right sensor floats 4 will be performed in a direction in which the body on the moved up side becomes higher. Seedling planting machine, characterized in that.