JPH0331603B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a front and rear four-wheel type planting machine.

(Prior art) The previously known specification and drawings of Utility Model Application No. 52-9914 and drawings (Japanese Utility Model Application Publication No. 53-103823) include a machine body and a device installed in the machine body that moves up and down to plant seedlings on the rice field. a left transmission case and a right transmission case whose bases are attached to the shaft of the machine body and are tilted downward to the rear; a left wheel provided at the rear end of the left transmission case; and a rear end of the right transmission case. between a right wheel provided on the aircraft body, a coupling member coupling the left transmission case and the right transmission case, a float provided on the aircraft body that floats on the water surface of the paddy field, and the aircraft body side and the coupling member side. a height adjustment mechanism that is provided and expands and contracts by a screw mechanism to simultaneously move the left wheel and the right wheel up and down; and a height adjustment mechanism that is attached to the coupling member and rotates the coupling member to adjust either the left wheel or the left wheel. A rice transplanting device is described that includes a slope adjustment mechanism that adjusts either the slope to be high or the other to be low.

In addition, the previously known specification and drawings of Japanese Utility Model Application No. 1982-45382 (Japanese Utility Model Application Publication No. 54-149012) include an aircraft body,
a left power transmission case and a right power transmission case whose bases are attached to the front shaft of the aircraft body and are tilted forward and downward;
a left front wheel provided at the lower end of the left transmission case, a right front wheel provided at the lower end of the right transmission case, a connecting member that connects the left transmission case and the right transmission case, and a connecting member that connects the left transmission case and the right transmission case; A left transmission case and a right transmission case that are pivotably supported at an angle downward, a left rear wheel provided at the tip of the left transmission case, a right rear wheel provided at the tip of the right transmission case, and the left front wheel and the left a connecting member that moves up and down in conjunction with a rear wheel; a connecting member that moves up and down in conjunction with the right front wheel and the right rear wheel; and a connecting member that is attached to the coupling member and rotates to rotate the coupling member. A front and rear four-wheel type work machine is described, which includes a screw mechanism for adjusting the left front wheel, the left rear wheel, and the right front wheel and the right rear wheel to make one higher or the other lower. ing.

In addition, the previously known specification and drawings of Utility Model Application No. 52-61582 and the drawings (Japanese Utility Model Application No. 1983-154829) disclose that in the device of the aforementioned Utility Model Application No. 52-9914, a hydraulic mechanism is included in the wheel vertical movement mechanism. The equipment used is described.

(Problems to be Solved by the Invention) The previously known devices described in the specifications and drawings of Utility Model Application No. 52-9914 and Utility Model Application No. 52-61582 are all rice transplanting devices. This is a device that targets flat water surfaces and not the ridges of sloping fields. When targeting ridges, the entire machine automatically moves up and down based on the ridges to maintain the same planting depth. However, this point has not been taken into consideration. In addition, rice transplanters float above the paddy field, so they do not tilt to the left or right, but rice transplanters for sloping fields tend to tilt with either the left or right side higher and the other side lower. Care must be taken to return the aircraft to horizontal position and plant the seedlings vertically.
Furthermore, rice transplanting equipment has two wheels on the left and right, but a planting machine for use on slopes has four wheels on the left and right, so countermeasures are also required.

In addition, the conventionally known work machine described in the specification and drawings of Utility Model Application No. 1982-45382 is a working machine with four wheels on the left and right, but the left and right wheels are set so that one is higher than the other. Even if the machine can be adjusted, it cannot be used as a planting machine because it does not have a mechanism that can automatically raise and lower the entire machine based on the ridges.

(Purpose of the Invention) The present invention is a planting machine having four left and right wheels that can always maintain the same planting depth even if the ridges have different heights. .

Further, the present invention is adapted to cope with the height of ridges on sloped land.

(Means for Solving the Problems) The present invention has thus been devised, and comprises: a body 18; a planting device 22 provided on the body 18 that moves up and down to plant seedlings on the upper surface of the ridge 28; Front axis 29
a left power transmission case 30 and a right power transmission case 31 having their bases attached to and tilting backward downward; a left front wheel 32 provided at the lower end of the left power transmission case 30; and a right front wheel 33 provided at the lower end of the right power transmission case 31.
and the left transmission case 30 and the right transmission case 3.
1, a left support rod 41 and a right support rod 42 that are rotatably supported by the rear shaft 40 of the fuselage 18 in a tilted downward direction, and a left rear support rod 41 and a right support rod 42 provided at the tip of the left support rod 41. a wheel 43 and a right rear wheel 44 provided at the tip of the right support rod 42; a connecting member 45 that moves the left front wheel 32 and the left rear wheel 43 up and down in conjunction with each other; a connecting member 46 that moves up and down in conjunction with the wheel 44;
a sensing device 52 that detects the height of the ridge 28 provided on the body 18; and a sensing device 52 that detects the height of the ridge 28 provided on the body 18;
The left front wheel 32 and the right front wheel 33 are automatically extended and contracted by the sensing device 52 provided between the left front wheel 32 and the right front wheel 33.
a height control hydraulic cylinder 47 and a hydraulic rod 39 for automatically vertically moving the left rear wheel 43 and the right rear wheel 44; and the coupling member 38.
The connecting member 3 is attached to and expands and contracts.
a tilt control hydraulic cylinder 48 and a tilt control rod for rotating the left front wheel 32 and the left rear wheel 43 and the right front wheel 33 and the right rear wheel 44 to make one higher and the other lower; This is a four-wheeled planting machine consisting of 49 front and rear wheels.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings. In FIG. 3, reference numeral 18 is a body of a vegetable planting device, and an engine 19 is attached to the upper center of the body. 20
2 is a seedling stand provided above the engine 19, and 21 is a fuel tank provided in front of the engine 19.

At the rear of the body 18, a planting device 22 for seedlings with soil is provided. The planting device 22 has a beak-shaped opening tool 2 at the lower end.
3 is attached and is moved up and down parallel to the fuselage 18 by means of a parallel link rod 24.

Reference numeral 25 indicates a horizontal rotating shaft provided at the front and rear intermediate portions of the fuselage 18, 26 indicates an arm whose base is fixed to the rotating shaft 25 and rotates with the rotation of the rotating shaft 25, and 27 indicates the tip of the arm 26 and the parallel link. When the arm 26 rotates, it connects the parallel link rods 24 and 2 via the rod 27.
Move the end of 4 up and down, and connect the parallel link rods 24, 24.
The planting device 22, which is pivotally supported on the tip side of the seedling, is lowered to plant the seedlings on the upper surface of the ridge 28 that has been formed in advance.

Thus, a front shaft 29 in the left and right direction is provided at the front end of the body 18. A left transmission case 3 is attached to the front shaft 29.
0 and the upper end base side of the right transmission case 31, respectively.

The left and right transmission cases 30 and 31 are inclined backward and downward, and their lower ends move up and down about the front shaft 29.
and the right front wheel 33 is attached to the lower end of the right transmission case 31 (Fig. 4).

A left arm 34 projecting upward from the front shaft 29 is directly or indirectly provided at the upper end of the left transmission case 30, and the front end of a right rod 36 extending rearward is pivoted to the upper end of the left arm 34. be done. Similarly, the upper end of the right transmission case 31 is provided with the front shaft 2.
A right arm 35 is provided that projects upward from the right arm 35, and the front end of a right rod 37 extending rearward is pivoted to the upper end of the right arm 35.

The rear ends of the left and right rods 36, 37 are connected to a left-right connecting rod 38, and a height control hydraulic cylinder 47 that moves back and forth is located at the left and right intermediate position of the connecting rod 38.
The hydraulic rod 39 is pivotally supported, and when the hydraulic rod 39 is extended, the connecting rod 38, left and right rods 36, 37,
The left and right transmission cases 30 and 31 are rotated clockwise in FIG. 3 via the left and right arms 34 and 35, and the left front wheel 32
and the right front wheel 33 are simultaneously moved down. When the hydraulic rod 39 is retracted, the left and right transmission cases 30 and 31 are rotated counterclockwise in FIG. 33 upward at the same time.

A rear wheel 40 is provided behind the front shaft 29.

The rear axle 40 of the embodiment shown in FIG. 2 is formed by bending the upper end of the support rod for the rear wheel. 41 is a support rod, and 42 is a right support rod, both of which have their upper ends bent to support the rear shafts 40, 4.
0, and the left support rod 41 and right support rod 42 are
Both are inclined rearward, and a left rear wheel 43 is attached to the tip of the left support rod 41, and a right rear wheel 44 is attached to the tip of the right support rod 42 (FIG. 3).

Therefore, a connecting rod 45 is installed between the vertical intermediate position of the left transmission case 30 and the vertical intermediate position of the left support rod 41, and the connecting rod 45 is attached between the vertical intermediate position of the right transmission case 31 and the vertical intermediate position of the right support rod 42. A connecting rod 46 is attached between them, and the relationship between the front shaft 29, the rear shaft 40, and the connecting rods 45 and 46 forms a parallelogram.

In FIG. 6, a tilt control hydraulic cylinder 48 and a tilt control rod 49 are pivoted between a connecting rod 38 and a right rod 37, which are pivoted to a hydraulic rod 39 of a height control hydraulic cylinder 47. be. Incidentally, the tilt control hydraulic cylinder 48 and the tilt control rod 49 are connected to the connecting rod 38 and the left and right rods 36, 3.
7, the other end of the control hydraulic cylinder 47 may be pivoted to a fixed portion.

FIG. 7 shows a hydraulic path, where 51 is a hydraulic switching valve for the control hydraulic cylinder 47, and 50 is a hydraulic switching valve for the tilt control hydraulic cylinder 48.

52 in FIGS. 3 and 8 is a sensing device, and the ridge 2
8 is detected, the hydraulic switching valve 51 is automatically switched and the control hydraulic cylinder 47 is automatically controlled to automatically adjust the height of the aircraft.

(effect) Next, we will discuss the effect.

(Overall operation) When the engine 19 is started and the traveling mechanism is activated, the left front wheel 32 and the right front wheel 33 are driven to rotate.
It moves forward with four wheels, front and rear. The rotation of the engine 19 is transmitted to the rotating shaft 25, which rotates the arm 26, which is a crank, to move the rod 27 back and forth, and the back and forth movement of the rod 27 causes the rear end of the parallel link rod 24 to move. Move up and down.
Since the planting device 22 is attached to the rear end of the parallel link rod 24, the planting device 22 moves up and down, and a hole is made on the ridge 28 by the beak-shaped opening tool 23 attached to the lower end of the planting device 22. Plant seedlings with soil.

(Vertical Adjustment of the Whole Machine Body) During the operation, the machine body 18 can be raised or lowered as a whole with respect to the ridges 28. The height of the fuselage 18 is automatically detected by a sensing device 52 that advances in contact with the ridge 26. The sensing device 52
is connected to the hydraulic switching valve 51, so the hydraulic switching valve 51 is automatically switched, and the hydraulic rod 39 of the height control hydraulic cylinder 47 is extended or contracted as shown in FIG. In this case, the left and right transmission cases 3 are
0 and 31 clockwise in FIG. 3, lowering the left front wheel 32 and the right front wheel 33 at the same time to raise the fuselage 18 and retracting the hydraulic rod 39, the connecting rod 3
8. Left and right rods 36, 37. Left and right arms 34, 3.
5, rotate the left and right transmission cases 30, 31 counterclockwise in FIG.
are raised at the same time to lower the machine body 18, and the seedlings are always planted at the same depth.

In addition, as mentioned above, the left front wheel 32 and the right front wheel 3
3, the left rear wheel 43 and right rear wheel 44 are simultaneously adjusted up and down via the connecting rods 45 and 46, so that the fuselage 18 remains horizontal both front and rear.

(Slope adjustment effect) When working on a slope where either the left or right side is high, the machine body 18 is leveled by the expansion and contraction of the tilt control rod 49 of the tilt control hydraulic cylinder 48, and the ridge 2
Plant the seedlings perpendicular to 8. In other words, when the left side is low (Fig. 4), the left front wheel 3 leans to the left.
2 is lowered and the right front wheel 33 is raised and leveled. In this case, when the tilt control rod 49 is reduced,
The connecting rod 38 rotates to the right by a desired angle as shown in FIG.
Now press 7. Therefore, the left rod 36.
The left transmission case 30 is rotated downward via the left arm 34 to move the left front wheel 32 downward. Also, push the right rod 37 and connect the right transmission case 3 via the right arm 35.
1 is rotated upward, the right front wheel 33 is moved upward, the machine body 18 is made horizontal, and the seedlings are planted perpendicularly to the ridges 28. Plants grow vertically even on slopes, so seedlings should be planted vertically.

The opposite is true when the right side is low.

In some cases, it may be more convenient to fix the balance device 17 so that it does not operate. In that case, if the valve 50 is switched to the neutral position shown in FIG. 5, the tilt control hydraulic cylinder 48 This is to cut off the circuit to the system and stop it.

(Effects) As mentioned above, the conventionally known devices described in the specifications and drawings of Utility Application No. 52-9914 and U.S. Pat. This is a device that targets ridges formed on sloped land. When using a planting machine that targets ridges, the ridges have high and low heights, so even on flat ground, the entire machine automatically moves up and down based on the ridges.
This requires a mechanism to keep the planting depth constant, but this point has not been taken into consideration. Additionally, rice transplanters float above the rice paddies, so they do not tilt to the left or right, but rice transplanters used in fields are sometimes used on slopes, so one of the left and right sides will be higher and the other will be lower. Sometimes. When planted with such an inclined planting machine, the crops are planted at right angles to the slope, resulting in crooked crops when they grow. therefore,
Although the plant must be planted horizontally, the above-mentioned known example lacks consideration for returning the plant to a horizontal position using simple means. Furthermore, although the rice transplanting device has two left and right wheels, field planting machines usually have four wheels on the left and right, so countermeasures are also required for four wheels on the left and right.
Furthermore, the conventionally known planting machine described in the specification and drawings of Utility Model Application No. 1983-45382 is a planting machine with four left and right wheels. It cannot be used as a planting machine because it can only be adjusted low and does not have a mechanism that can automatically raise and lower the entire machine based on the ridge.

However, the present invention provides the airframe 18 and the airframe 18.
a planting device 22 that moves up and down to plant seedlings on the upper surface of the ridges 28; a left power transmission case 30 and a right power transmission case 31 whose bases are attached to the front shaft 29 of the machine body 18 and are tilted backward and downward; and a left front wheel 22 provided at the lower end of the left transmission case 30 and a right front wheel 33 provided at the lower end of the right transmission case 31;
a connecting member 38 that connects the left transmission case 30 and the right transmission case 31; a left support rod 41 and a right support rod 42 that are rotatably supported by the rear wheel 40 of the fuselage body 18 in a tilted downward direction; Support rod 4
1, a right rear wheel 44 provided at the tip of the right support rod 42, and the left front wheel 3.
2 and the left rear wheel 43 to move up and down in conjunction with each other, and the right front wheel 33 and the right rear wheel 44.
a connecting member 46 that moves up and down in conjunction with the connecting member 46, a sensing device 52 that detects the height of the ridge 28 provided on the body 18, and a sensing device 52 that is provided between the body 18 side and the connecting member 38 side and a height control hydraulic cylinder 47 that automatically expands and contracts by a device 52 to automatically move the left front wheel 32, the right front wheel 33, the left rear wheel 43, and the right rear wheel 44 up and down simultaneously;
and a hydraulic rod 39, which is attached to the coupling member 38 and expands and contracts to rotate the coupling member 38, and rotates the left front wheel 32 and the left rear wheel 43.
and a tilt control hydraulic cylinder 48 and a tilt control rod 4 for adjusting either the front right wheel 33 or the rear right wheel 44 to make one higher or the other lower.
Since the configuration of the front and rear four-wheeled planting machine is made up of the Detected by a device 52, the sensing device 5
2, the height control hydraulic cylinder 47 and hydraulic rod 39 provided between the fuselage 18 side and the connecting member 38 side are operated to automatically raise and lower the left and right four wheels at the same time, so that the plant is always planted at the same depth. Planting can be done using the attaching device 22.

(b) When planting in the ridge 28 on a slope,
One of them will be high and the other will be low, but in that case, depending on the degree of inclination, the inclination control hydraulic cylinder 48 and the inclination control rod 49 will be adjusted.
By expanding and contracting the , the front and rear four-wheeled planting machine immediately becomes horizontal and can be used to plant vertically. Therefore, it is possible to grow crops even on sloping fields.

C. When planting in a ridge 28 on a slope, the planting machine can be leveled by extending and retracting the slope control hydraulic cylinder 48 and slope control rod 49 depending on the degree of slope, but even in that state, the height of the ridge 28 can be ,
Detected by a sensing device 52 provided on the aircraft body 18,
The height control hydraulic cylinder 47 and the hydraulic rod 39, which are interlocked with the sensing device 52 and are provided between the fuselage 18 side and the connecting member 38 side, are operated to automatically raise and lower the left and right four wheels at the same time, and always maintain the same depth. Planting can be done using the planting device 22.

(d) Adjustment of the inclination is performed using the inclination control hydraulic cylinder 48.
and tilt control rod 49,
It is also easy to add an automatic control mechanism.

E. It is easy to implement because of its simple configuration.

This effect is achieved.

[Brief explanation of drawings]

Figure 1 is a side view of the front and rear wheels, Figure 2 is a partially cutaway plan view, Figure 3 is a side view, Figure 4 is a partial front view, Figure 5 is a hydraulic diagram of the switching valve, 6 is a cross-sectional plan view of the inclination control device, FIG. 7 is a front view showing the position of the wheels, and FIG. 8 is a front side view. Explanation of symbols, 17... Balance device, 18... Airframe, 1
9... Engine, 20... Seedling stand, 21... Fuel tank, 22... Planting device, 23... Beak-shaped opening tool, 24...
Parallel link rod, 25...Rotation axis, 26...Arm, 2
7...rod, 28...ridge, 29...front shaft, 30...right transmission case, 31...left transmission case, 32...right front wheel,
33...Left front wheel, 34...Left arm, 35...Right arm, 36...Left rod, 37...Right rod, 38...Connecting rod, 39...Hydraulic rod, 40...Rear shaft, 41...Left support rod, 42...Right support Rod, 43...Left rear wheel, 44...
Right rear wheel, 45...Left coupling rod, 46...Right coupling rod, 47...Height control hydraulic cylinder, 48...Tilt control hydraulic cylinder, 49...Tilt control hydraulic rod, 50...Hydraulic pressure switching valve, 51...Hydraulic pressure switching valve, 52...Sensing device.

Claims (1)

[Claims] 1 a machine body 18, a planting device 22 provided on the machine body 18 that moves up and down to plant seedlings on the upper surface of the ridge 28;
A left power transmission case 30 and a right power transmission case 31 whose bases are attached to the front shaft 29 of the body 18 and are inclined backward downward, and a left front wheel 32 and the right power transmission case 31 provided at the lower end of the left power transmission case 30. The right front wheel 33 provided at the lower end and the left transmission case 3
0 and the right transmission case 31; a left support rod 41 and a right support rod 42 that are supported by the rear shaft 40 of the fuselage body 18 in a tilted downward direction, and the left support rod 41. A left rear wheel 43 provided at the tip, a right rear wheel 44 provided at the tip of the right support rod 42, the left front wheel 32, and the left rear wheel 43.
A connecting member 45 that moves up and down in conjunction with the right front wheel 33 and the right rear wheel 44, a connecting member 46 that moves up and down in conjunction with the right front wheel 33 and the right rear wheel 44, and the height of the ridge 28 provided on the fuselage 18 is detected. A sensing device 52 is provided between the body 18 side and the coupling member 38 side, and the left front wheel 3 is automatically expanded and contracted by the sensing device 52.
2, and a height control hydraulic cylinder 47 and hydraulic rod 3 that automatically move the right front wheel 33, the left rear wheel 43, and the right rear wheel 44 up and down simultaneously.
9 is attached to the coupling member 38 and expands and contracts to rotate the coupling member 38 and connect the left front wheel 32 and the left rear wheel 43 to the right front wheel 33 and the right rear wheel 44. This is a front and rear four-wheel type planting machine comprising a tilt control hydraulic cylinder 48 and a tilt control rod 49 that adjust one of the two to be high and the other to be low.