JP2887967B2 - Seedling machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in a field plant seedling plant, and further improves the uniformity of planting depth of seedlings.

[0002]

2. Description of the Related Art Japanese Patent Laid-Open Publication No.
As seen in Japanese Patent No. 65113, a leveling plate slides on the upper surface of the ridge in front of the seedlings to be transplanted, and the drive wheels are moved up and down by the vertical movement of the leveling plate with respect to the fuselage. Means have been taken to keep the seedling transplanting depth uniform by keeping it at a certain height. It should be noted that a sensor using a roller is used instead of the leveling plate.

[0003]

Since the ridges are formed during the plowing operation, the soil is softened, but the degree of softening is partially varied depending on the soil properties and moisture. For this reason, when a few days have passed after the ridge work, the soil is settled, and irregularities are generated on the upper surface, and a difference in elevation may occur. Here, in the conventional one, the height of the fuselage was maintained based only on the upper surface of the ridge without affecting the looseness of the soil, so the seedbed was raised several days after transplanting. Sometimes it became shallow.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a drive wheel 9 which is provided so as to move up and down with respect to an airframe 4 and which is propelled in a valley of a ridge 10 formed in a field. , 9, an implantation rod 29 for transplanting seedlings on the upper surface of the ridges 10, and a soil provided on the upper surface of the body 4 so as to move up and down with respect to the machine body 4. And the driving wheels 9, 9 and the compression wheel 33 are arranged such that when the compression wheel 33 moves up and down with respect to the body 4, the driving wheels 9, 9 are compressed against the body 4, The seedling transplanter is characterized in that it is provided so as to move up and down in a direction opposite to that of 9 so as to keep the height of the body 4 constant.

[0005]

According to the present invention, the drive wheels 9, 9 rotate in the valleys of the ridges 10 to propel the machine body 4, and the implant rods 29 move the seedlings during the propulsion. The seedlings are transplanted to the upper surface, and crushed so that the crushing wheel 33 moves the soil beside the seedlings toward the seedlings.

When the crushing wheel 33 rises with respect to the fuselage 4 due to the above-described suppression, the drive wheels 9, 9 lift the fuselage 4 from the fuselage 4, and when the crushing wheel 33 falls with respect to the fuselage 4, the driving wheel 9 drives. The wheels 9, 9 are raised with respect to the body 4, and lower the body 4. That is, in this way, the fuselage 4 is
3 and is supported by the drive wheels 9 at a fixed height with respect to the upper surface of the ridge 10 after the compression.

[0007]

As described above, according to the present invention, the pressure-reducing wheels 9, 9 push down (repress) the upper surfaces of the ridges 10 which have been expanded and softened and have different degrees of expansion with a constant pressure, and the lowered height is reduced. Since the height of the body 4 is maintained on the basis of the standard, the height of the body 4, that is, the planting depth of the seedlings is maintained in a state corrected by the difference in soil stiffness. Therefore, several days after the transplantation of the seedlings, the seedlings did not float even when the soil was soft.

[0008]

Next, an embodiment of the present invention will be described. FIG.
As described above, the front gear box 1 and the rear gear box 2 are connected by the cylinder 3 to form the body 4. The engine 5 is fixed in front of the front gear box 1, and its power passes through the front gear box 2 and the cylinder 3 to reach the rear gear box 2. Transmission case 6
Extends upward from the rear gear box 2 on the left side of the center of the body 4 and has a handle 7 fixed in the middle thereof.

A pair of left and right wheel cases 8 and 8 are
The drive wheels 9, 9 are attached to the rear end of the vehicle. These wheel cases 8, 8 rotate about the horizontal axis at the tip thereof, and drive wheels 9, 9 move up and down with respect to the body 4, and the power in the front gear box 1 is applied to the wheel cases 8, 8. At 8 chains, the wheels reach the respective drive wheels 9, 9 and are propelled across the ridges 10.

As shown in FIGS. 1 and 2, a cylinder 11 is attached to the body 4 in the front-rear direction.
Are connected so as to rotate around. Each of the wheel cases 9, 9 has an arm 15, 15 protruding upward at a distal end thereof, and upper ends of the arms 15, 15 and both ends of the horizontal rod 13 are connected by rods 16, 16, respectively. And the wheel case 8, 8
Is rotated about the horizontal axis at the front end, and the drive wheels 9, 9 at the rear end are rotated.
Is moved up and down with respect to the body 4.

A pair of brackets 17, 17 are provided on the rear gear box 2
The horizontal axis 18 is rotatably supported at the point. A pair of right and left legs 19, 19 extend obliquely downward from both ends of the horizontal shaft 18, and idle wheels 20, 20 are attached to the lower ends thereof. When the arm 21 extends upward from the center of the horizontal shaft 18, the upper end thereof is connected to the center of the horizontal rod 13 by a rod 42, and when the drive wheels 9, 9 move up and down as described above due to the piston rod 12 protruding and retracting. , Legs 19, 19 are horizontal axis 18
And the idler wheels 20, 20 are driven by the drive wheels 9, 9
It is made to move by the same amount in the same direction as. Note that the left and right idle wheels 20, 20 are also arranged behind the respective drive wheels 9, 9 so as to straddle the ridge 10.

As shown in FIG. 1, a groove making tool 22 extends downward from the rear gear box 2 and its lower end protrudes into the ridge 10. When the body 4 moves forward, the soil on the upper surface is scraped to form a groove. Has become. The groove forming tool 22 may be configured to move up and down at a predetermined cycle to form a hole. A seedling table 23 having a certain width on which the group seedlings are placed is supported on the frame 4 so as to slide left and right, and reciprocates right and left by rotation of the lead cam shaft 24.

A first revolving case 25 is mounted on the right side of the transmission case 6 so that the power in the transmission case 6 rotates clockwise about the shaft 26. The second turning case 27 is made slightly longer than the first turning case 25, and is provided so as to rotate counterclockwise at the tip of the first turning case 25. And the first turning case 2
When the first rotation case 5 makes one rotation, the second rotation case 27 performs two rotations with respect to the first rotation case 25,
When the first turning case 25 turns up and down, the second turning case 27 extends further up and down, and when the first turning case 25 turns back and forth, the second turning case 27 makes the first turning. In a state of being folded with respect to the case 25, the tip of the second turning case turns up and down on a long elliptical orbit.

A planting case 28 is attached to the tip of the second turning case 27 so as to turn in the same posture. The implantation case 28 is provided with an implantation rod 29. The implanted rod 29 includes a pair of left and right plates 30, 30;
As is well known, the plate 30 is opened and closed by rotation of a cam in the planting case 28, and the pusher 31 is moved up and down. Then, during the descent by the swivel, the leading end reaches the above-mentioned groove formed by the groove forming tool 22 through the rear end of the seedling mounting table 23, but the plates 30, 30 are closed on the seedling mounting table 23 and The extruding tool 31 is lowered at the same time as the bottom of the seedlings is opened and opened at the lower end, thereby pushing down the floors and transplanting the seedlings into the ditch.

A front end of a longitudinally extending support rod 32 is rotatably mounted on the horizontal shaft 18, and a pressure reducing wheel 33 is rotatably mounted at an intermediate portion thereof. The crushing wheel 33 is formed in a frusto-conical shape, is located slightly behind the transplanted seedlings, and is designed to crush the soil while filling the groove. The lower end of the support shaft 34 extending downward from the rear end of the transmission case 6 is inserted through the rear end of the support rod 32, and is pressed downward by a spring 35. The spring 35 can adjust the above-mentioned pressing force by adjusting the upper receiving member 36 up and down.

As shown in FIGS. 1 and 2, a lever 37 extends upward from the left end of the support rod 32, and its upper end is connected to a valve 39 by a rod 38. The oil path that reaches is switched. That is, when the compression wheel 33 is lowered, the lever 37 rotates clockwise, and the rod 38 pulls the valve 39 to the right. Then, the oil discharged from the pump 40 enters the right chamber of the cylinder 11, the oil in the left chamber returns to the tank 41, the piston rod 12 is pulled to the left, the horizontal rod 13 moves in the same direction, and both ends thereof Are arm 15,15 with each rod 16,16
5, the wheel cases 8, 8 rotate counterclockwise, and the drive wheels 9, 9 rise to the body 5 side. On the other hand, the rod 42 is pulled to the left at the center of the horizontal rod 13, and the arm 21 is moved to the legs 19, 19.
In the counterclockwise direction, and the idler wheels 20, 20
Climb to the side. As a result, the body 4 descends.

Conversely, when the compression wheel 33 rises with respect to the body, the lever 37 rotates counterclockwise, the valve 39 switches the oil path in the opposite direction, and the drive wheels 9 The idle wheels 20, 20 are lowered, and the body 4 is raised. In addition, the support rod 3
2. The pressure-reducing wheel 33 and the support shaft 34 are formed as a pair of left and right, and the left side of the left and right support rods 32 can be fixed with a pipe or the like, and a single lever 37 can be protruded from this.

As shown in FIG. 1, an operation lever 43 is provided near the handle 7 and the rear end of the support rod 32 is
4 and the wire 44 pulls up the rear end of the support rod 32 when the operation lever 43 is rotated counterclockwise. Then, by this manual operation, the wheels 9 and 20 go down and the body 4 goes up, so that it is convenient to move the seedling transplanter between the fields. The operation lever 43 is configured so that three members can be selected from the above-mentioned body raising position, the automatic position where the wire 44 is loosened, and the position where the valve 39 is neutral and stationary in the middle. 1 and 2 show a mechanism for mechanically operating the valve 34, but an angle sensor or a stroke sensor is provided at an appropriate position of the rotating support rod 32 to electrically detect the displacement thereof. Then, as a result, a configuration in which the solenoid valve is operated to switch the oil passage or the servomotor is operated can also be adopted. Regarding the configuration of the manual operation of the valve 38, the valve 38 can be directly operated by giving priority to its automatic operation.

This seedling planter is, as shown in FIGS.
It is used in a field where the mulch 46 is formed on the entire surface of the ridge 10 on a flat ground, and a field where the ridge 10 is formed along the contour line as shown in FIG. As shown in FIG. 3 and FIG.
When 6 is applied, the embankment 47 is dotted in the valley to prevent the multi-film 46 from peeling off. Then, when one of the drive wheels 9, 9 rides on the embankment 47, the body 4 inclines horizontally. Further, also in the field of FIG. 5, the body 4 is inclined sideways. Therefore, the following configuration is provided in preparation for these lateral inclinations.

That is, as shown in FIGS. 6 and 7, a pair of left and right cylinders 48, 48 are provided on the body 4 so that the left and right drive wheels 9, 9 are independently moved up and down. An inclination sensor 49 for reading the inclination in the lateral direction is provided, and its output is input to the control device 50. Airframe 4 with crusher wheel 33
The movement in the vertical direction with respect to is captured by the stroke sensor 51 and is input to the control device 50. Further, the mode changeover switch 52 is configured to be able to select between the above-mentioned all-round mode in which the mulch 46 is provided on the entire surface and the tilt mode in which the vehicle is driven along the contour line.

When the all-round mode is selected by the mode changeover switch 52 and the seedling plant is operated in a field where mulching is performed on the entire surface, the control device 50 operates the respective drive wheels 9, 9 as follows. And maintain the level and height of the fuselage 4. When the inclination sensor 49 detects that the vehicle goes up to the left and the stroke sensor 51 detects that the pressure-reducing wheel 33 has gone down,
Since the left driving wheel 9 rides on the embankment 47, the control device 50 outputs the input to raise the left driving wheel 9 (FIG. 3). When the inclination sensor 49 detects the inclination of the upper right and the stroke sensor 51 detects that the compression wheel 33 has been lowered,
Since the right driving wheel 9 is riding on the embankment 47, the control device 50 outputs the input and the right driving wheel 9 is raised. When the inclination sensor 49 detects the upper right inclination and the stroke sensor 51 detects that the pressure-reducing wheel 33 has gone up,
Since the left driving wheel 9 has passed over the embankment 47, the control device 50 outputs the input to lower the left driving wheel 9 (FIG. 4). When the inclination sensor 49 detects the upward inclination, and the stroke sensor 51 detects that the compression wheel 33 has moved up,
Since the right driving wheel 9 has passed over the embankment, the control device 50 outputs the input to lower the right driving wheel 9. If the inclination sensor 49 does not detect the inclination and the stroke sensor 51 detects that the pressure-reducing wheel 33 has risen, the control device 50 outputs the input to output the left and right drive wheels 9, 9.
At the same time. If the inclination sensor 49 does not detect the inclination and the stroke sensor 51 detects that the pressure-reducing wheel 33 has dropped, the controller 50 outputs the input to output the left and right drive wheels 9, 9.
At the same time.

As described above, six combinations are generated in the inclination direction and the upper and lower positions, and the left and right drive wheels 9,
Since 9 is moved up and down, the movement is smooth. Subsequently, the tilt mode is selected by the mode changeover switch 52, and the seedling transplanter is operated on a ridged field formed along the contour line.
At this time, the control device 50 controls the driving wheels 9,
9 is operated as follows.

That is, as shown in FIG. 5, the left and right drive wheels 9, 9 are moved up and down in opposite directions, so that the body 4 is kept horizontal and horizontal. When a change occurs in the angle of the inclined surface and this is detected by the inclination sensor 51 and input to the control device 50, the control device 50
By using the output, the right and left drive wheels 9 and 9 are respectively moved up and down in the opposite directions to return the body 4 to the horizontal state. When the stroke sensor 51 detects a change in the vertical position of the compression wheel 33 and inputs it to the control device 50, the control device 50
Moves the left and right driving wheels 9, 9 simultaneously in the same direction with the output, thereby keeping the height of the body constant.

In the control method shown in FIGS. 6 and 7, a conventional leveling plate type vertical sensor or the like is used instead of detecting the vertical movement of the pressure-reducing wheel 33. Although the cylinder in the figure is a single-acting cylinder, a double-acting cylinder may be used. Further, a servomotor may be used instead of the hydraulic cylinder. Further, the rod 38 connecting the valve 39 and the lever 37 in the embodiment shown in FIG. 1 can be configured to expand and contract as shown in FIG. That is, the rod 38 is divided into a cylinder 38a and a piston 38b sliding in the cylinder 38a, and each outer end is connected to the lever 37 and the valve 39. The piston 38b is a cylinder 38a
It is pushed out to the valve 39 side by the inner spring 53 and pulled back by the wire 54, and the end of the wire 54 is attached to the lever 55, and the lever 55 is configured to be hooked at a desired position of the body 4. Then, when the lever 55 is rotated clockwise and latched, the rod 38 becomes shorter, and when the lever 55 is operated in the opposite direction, the rod 38 becomes longer. Thus, deep planting and shallow planting of seedlings can be selected as desired.

[Brief description of the drawings]

FIG. 1 is a side view of a seedling planter according to the present invention.

FIG. 2 is a conceptual diagram thereof.

FIG. 3 is a cut-away front view of a field where a seedling planter is used.

FIG. 4 Same as above.

FIG. 5 is a cutaway front view of another field.

FIG. 6 is a side view of a seedling plant used in the field.

FIG. 7 is a control diagram thereof.

FIG. 8 is a partially cut-away side view showing a configuration in which the planting depth of the seedling can be selected.

[Explanation of symbols]

 4 Airframe 9 Drive wheel 10 Ridge 29 Implant rod 33 Squeezing wheel

Claims (1)

(57) [Claims] A driving wheel provided to move up and down with respect to a body and propelled in a valley of a ridge formed in a field, and an implant for transplanting seedlings on an upper surface of the ridge. Rod 2
9 and a pressure-reducing wheel 33 which is provided so as to move up and down with respect to the body 4 and which represses the soil on the side of the transplanted seedlings with a constant pressure by the implantation rod 29. Crush ring 3
3 means that when the crushing wheel 33 moves up and down with respect to the body 4, the driving wheels 9 and 9 move up and down with respect to the body 4 in the opposite direction to the crushing wheels 9 and 9 to keep the height of the body 4 constant. A seedling plant that is provided so as to keep it.