JP2001258322A - Transplanter keeping controlled horizontal state - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of slow action of horizontal state controlling work caused by the screw-feeding with a motor and a screw shaft for lifting and lowering the right and left rear wheels relative to each other. SOLUTION: A hydraulic pump 17 is used as the driving source, a hydraulic cylinder 21 is extended or contracted with the pump 17 using a selector valve 22 and the switching of the selector valve 22 is performed by the pendulum movement of a pendulum-type sensor 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal control type transplanter, in which vegetables such as cabbage, lettuce, broccoli and the like are planted on ridges and the like in a field.

[0002]

2. Description of the Related Art In a transplanting machine for transplanting seedlings such as vegetables to ridges in a field, an airframe having a pair of left and right wheels and a planting frame having a transplanting mechanism are separated from each other. In addition to pivoting the planting frame so that it can move up and down freely, a sensor that detects the left and right inclination of the body is provided, and the left and right wheels are moved up and down relatively to hold the transplantation work in the contour direction on the slope etc. There is a horizontal control type in which an airframe is controlled substantially horizontally (Japanese Patent No. 2569226).

[0003]

In the transplanter disclosed in the above-mentioned publication, a driver's seat and an engine are arranged (mounted) on a traveling body at a distance from each other, and a battery is arranged between the two. . Therefore, the position where the sensor body in the left and right direction is mounted is limited, and the drive source driven by the detection signal of this sensor body is a motor, and the screw shaft is fed by this motor to raise and lower the left and right axle. The left and right rear wheels relatively moved up and down via the mechanism.

[0004] However, there is a problem that the operation is slow when the screw feed is performed by the motor drive, it is difficult to quickly move the left and right rear wheels up and down, and the planting accuracy is deteriorated.
Also, due to the screw feed, if mud, gravel, etc. bites into the screwed part, not only will the transmission malfunction, but also the screwed part will be damaged by a large load and there is a problem in terms of durability. In particular, this problem has been serious since gravel and the like easily bite in the field. Therefore, the present invention, by arranging a sensor body for detecting the inclination in the left-right direction between the driver's seat and the engine and a switching valve that is operated by a drive source by a detection signal or a detection motion of the sensor body, It is an object of the present invention to move the left and right rear wheels relatively up and down by the expansion and contraction operation of fluid pressure instead of screw feed, thereby enabling quick operation with good responsiveness.

[0005]

SUMMARY OF THE INVENTION The present invention comprises a pair of left and right front wheels and a pair of left and right rear wheels, and is configured to travel by supporting a traveling body equipped with a driver's seat and an engine with the front and rear wheels. In the horizontal control type transplanter in which the pair of right and left rear wheels are relatively moved up and down to control the traveling body substantially horizontally, in order to achieve the above-described object, the following technical measures are taken. I have. That is, in the horizontal control type transplanter according to claim 1, the driver's seat and the engine are disposed apart from each other in the front and rear directions, and a horizontal control sensor is provided between the two and on the side of the traveling body almost directly above the left and right rear wheels. It is characterized in that a body and a drive source are arranged.

[0006] With such a configuration, the weight of the sensor body and the drive source acts on (adds to) the rear wheel, thereby eliminating slip of the rear wheel and improving planting accuracy.
In the above-described claim 1, the driver's seat is provided at an intermediate portion in the front-rear direction of the traveling body, the engine is mounted on a rear portion of the traveling body, and the traveling body is extended rearward so as to perform a turning operation of the traveling body. A handle, wherein the sensor body is configured to perform a pendulum movement, the drive source is a fluid pressure pump, and a switching valve that is switched by the pendulum movement of the sensor body is provided ( Claim 2).

By using the hydraulic pump as the drive source, the responsiveness of the switching valve switched by the pendulum movement becomes quick, and the switching of this valve makes it possible to immediately expand and contract the hydraulic cylinder. The turning operation of the traveling body on the ground or the like can be performed by turning the handle lightly.
Further, in the above-mentioned claim 2, it is recommended that the sensor body that performs a pendulum motion is provided at a central portion in the left-right direction of the traveling machine body, and that an operating means for switching the pendulum motion of the sensor body to lock or unlock is provided. (Claim 3).

With this configuration, the inclination of the sloping ground in the left-right direction can be reliably detected, and the pendulum movement can be locked or unlocked. Therefore, when entering or exiting a field or traveling on a road, the sensor body is used. He no longer exercises in vain. Further, in claims 1 to 3 described above, it is recommended that an oil tank is provided below the engine and at a lower rear portion of the traveling machine body (claim 4). This configuration not only prevents the rear wheel from slipping by adding the weight of the oil tank to the rear wheel, but also reduces the pushing force of the steering wheel with the rear wheel as a fulcrum, and travels on headlands, etc. The turn of the fuselage was also light and the circling was improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a horizontal control type transplanter according to the present invention will be described below with reference to the drawings. FIG.
Is an overall side view of a semi-automatic riding type vegetable (cabbage, lettuce etc.) transplanter P, and FIG. 2 is a plan view of the same. 1 and 2, the traveling body 1 is formed as a rectangular frame in plan view, and has a pair of left and right front wheels 2 on a front portion thereof and a pair of left and right rear wheels 3 on a rear portion thereof.
The vehicle can be driven in the longitudinal direction of the ridge while straddling the ridge F while supporting the body 2 with the four wheels.

A seat 4 is provided at an intermediate portion in the front-rear direction of the traveling body 1 (between the front wheel 2 and the rear wheel 3), and an operator sits on the seat (driver's seat) 4 to transfer seedlings for transplantation work. Work, steering work, etc. are possible. Since the pair of left and right rear wheels 3 are drive wheels, the seat 4 is arranged on the body 1 slightly closer to the rear wheels 3 so that the weight of the operator acts on the rear wheels 3 in order to increase the driving force. It is desirable to do. Since the pair of left and right front wheels 2 are steering wheels (steering wheels), the operator of the seat 4 can steer through the steering link means 6 by the left and right pedals 5 that can be moved.

The abdomen of the body of the front wheel 2 and the rear wheel 3 (the lower part of the body)
A seedling A such as cabbage, lettuce, broccoli and the like supplied (conveyed) by the seedling feeder 8 is formed in the ridge F by the groove generator 9. Implantable in the groove. The planting device 7
A pair of right and left planting disks (rubber disks) 7A is rotatably provided around a horizontal axis, and is illustrated as a rotary type in which the pair of left and right planting disks (rubber disks) is pressed by rollers 7B that sandwich the pair of left and right planting disks (rubber disks). However, another planting device 7 may be used.

A pair of left and right pressure-reducing wheels (pressure-reducing rollers) 10 are provided on the left and right outer sides of the planting device 7 so as to be rotatable around the inclined axis and to be able to swing up and down independently of the left and right (independently of the left and right). The right and left sides of the seedling A transplanted to the plant are compacted and covered with soil to correct the posture of the seedling A and ensure its vigor. The groove generator 9 is arranged in front of the planting device 7.
In the drawing, the groove generator 9 is shown as a disk (rotary type), but it may be a shoe type (boat type) groove generator. The seedling feeding device 8 includes a pair of left and right vertical feeding (vertical) belts 8.
A, the seedlings A can be conveyed to the planting device 7 while being held in the horizontal position by the belt 8A, and the operator of the seat 4 supplies the seedlings A to the upper part (transfer start end) of the vertical feed belt 8A. It is supposed to.

The planting device 7, the seedling feeding device 8, and the compression ring 10 are mounted on a swing frame 11 configured in an L-shape in a side view in the illustrated example. That is, the vertical frame 11A of the swing frame 11 is formed in a box shape so as to surround the seedling feeding device 8 from the left and right, and supports the belt 8A of the device 8 via pulleys so as to be freely rotatable, Lower frame 11B is vertical frame 1
It is stretched almost horizontally rearward as one piece with 1A,
The planting device 7 and the seedling feeding device 8 are rotatably supported, respectively, and the lower sides of the vertical frame 11A are swingably mounted on the body 1 by the fulcrum shaft 11C, and are connected to the rear end of the lower frame 11B. It is supported by a resilient means 11D composed of a coil spring that urges the whole body downward (toward the ground) and a rod wound around the body 1 between the body 1, where the planting device 7 and the crushing wheel 10 are placed in a field ( It follows the unevenness of the ridge.

The planting device 7 and the seedling feeding device 8 may be individually (separately) mounted on the machine body 1. The distance between the end (seedling transfer part) and the front upper part (seedling receiving part) of the planting device 7 is constant (standardized), and the seedling A can be transferred without damage, which is advantageous. The fulcrum shaft 11C is formed such that it can be freely inserted and removed (can be freely inserted and removed), and mounting holes (pivot holes) 11E are formed at intervals in the vertical direction. By selecting this mounting hole 11E, the entire vertical position can be freely changed. It is advantageous to be able to attach the seedlings, and the seedling feeding device 8 can make the posture of the operator on the seat 4 good for seedling replenishment by making the seedling feeding device inclined upward (for example, about 80).

The planting device 7 and the seedling feeding device 8 use a push-pull cable (Boden cable) by utilizing the rotational power of a grounding rolling wheel (gauge wheel) 12 provided outside one side of the planting device 7. Can be driven via a cable transmission such as a cable transmission, a link, or the like. Of course, the planting device 7 or the like can be driven via a wrapping transmission such as a belt, a bevel gear, a telescopic joint shaft, or the like using the engine power described later. May be driven.
An engine E is mounted on the rear end of the traveling body 1, specifically, on the body 1 slightly behind the pair of left and right rear wheels 3, and the rotational power of the engine E (engine output torque).
Is transmitted to a transmission (gear transmission) in a transmission case (transmission box) 14 via a belt tension type (wrapping transmission) 13, and the left and right output shafts 14 </ b> A of the transmission case 14 project outward in the left and right direction. A transmission body 15A in a left and right transmission case 15 which supports the left and right rear wheels 3 so as to be swingable around an output shaft 14A.
(A wrapping transmission such as a chain or a belt, a gear transmission) can be driven, and the output of the transmission 15A is the axle 3A of the rear wheel 3 (see FIG. 3).

The seat 4 mounted on the traveling body 1 and the engine E are spaced apart from each other in the front and rear direction.
A sensor body 16 for horizontal control and a drive source 17 are arranged on Q, and these are almost right above the left and right rear wheels 3 and
It is possible to add a load to An oil tank (hydraulic oil tank) 18 is attached to the rear lower surface (rear lower portion) of the traveling body 1 below the engine E and behind the transmission case 14, and a handle extending rearward from the traveling body 1. The 19 grip portion 19A is pushed down with the rear wheel 3 as a fulcrum, and the turning (lifting) of pushing up the front wheel 2 is light and the pushing force is not required much. .

The handle 19 (especially the grip 19)
A) is slightly raised during the transplanting operation (in the case of FIG. 1), and is substantially horizontal when pushed down, so that it can be steered while ensuring a small turning on a headland or the like. The force (turning force) becomes lighter. Referring to FIGS. 3 to 5, the main part of the present invention is illustrated. That is, the transplanter according to the present invention includes the wheel elevating means 20 for vertically moving the pair of left and right rear wheels 3 relatively up and down. Even if there is, reliable transplantation (planting) along the contour line is enabled.

A driving body for operating the wheel lifting / lowering means 20 is a hydraulic (hydraulic) cylinder 21 which expands and contracts.
The cylinder 21 is vertically arranged on the body 1 side with the axis of the cylinder 21 being vertically oriented (vertical direction). As a result, twisting, rusting, and the like, which are likely to occur when screws are screwed together, can be eliminated, and the distance (vehicle distance) between the front wheel 2 and the rear wheel 3 can be reduced to ensure turning performance (small turning performance). It is. Specifically, the fluid pressure (oil pressure) of the drive source (hydraulic pump) 17 is switched by the detection signal (detection operation) of the sensor body 16 to the switching valve 22.
The cylinder 21 is expanded and contracted by the pressurized oil (hydraulic oil) from the valve 22 to move the left and right transmission cases 15 relatively up and down around the output shaft 14A via the wheel elevating means 20. By moving the left and right rear wheels 3 up and down, it is possible to travel in a state where the aircraft 1 is controlled substantially horizontally even on a sloping ground in the left and right direction.

The hydraulic pump 17 is configured as a gear pump that rotates a gear by winding a belt 17B over a driving pulley 17A and a pulley provided on an output shaft of the engine E, and a spool type switching is provided on the pump discharge side. A valve (switching valve) 22 is in communication with the port (discharge port) of the valve 22 and the fluid cylinder 21 is connected by a pipe (not shown) so that the cylinder 21 can be extended and contracted. When the sensor body 16 is of a pendulum type (weight type), the sensor body 16 has a pendulum fulcrum 16A at the center in the left-right direction of the body 1 in the space Q. As shown in FIG. As a pendulum (weight) 16
B is swingable in the left-right direction, an arm 16D is projected from a boss 16C which is rotatably fitted to the pendulum fulcrum 16A, and the arm 16D and the spool 22A are connected to each other by a joint 22B.
Are linked together.

The pendulum fulcrum 16A projects forward from the body of the hydraulic pump 17 as a horizontal direction, and the weight 16B is provided below a plate-like mounting plate 16E having a boss 16C. By attaching the weight 16B to the mounting plate 16E in a detachable manner, the weight can be changed to a different weight or an additional weight can be followed, and the sensor sensitivity can be adjusted, which is advantageous. In addition, a substantially triangular through-hole (window) 16 is formed in the mounting plate 16E.
A lock F is provided in the through hole 16F, and the pendulum-type sensor 16 can be unlocked by the lock.

The lock body 23 is formed in a rod shape and protrudes from the operating shaft 23A. The operating shaft 23A is inserted between the mounting plate 16E and the body of the pump 17 in the left-right direction, and its axial center is adjusted. The operation shaft 23A is supported around a bearing 23B, and remote operation means 23C such as a lever, a link, or a body wire is mounted on the shaft end of the operation shaft 23A. Therefore, the lock member 23 is disengaged from the through hole 16F by the operating means 23C, and the pendulum 16B
Can be locked or unlocked. In the illustrated example, the lock body 23 is engaged with the lower concave portion of the through hole 16F to lock (fix the pendulum 16B) and expand the lock body 23 above the through hole 16F. The opening allows the pendulum 16B to operate (unlock) and regulate the pendulum width.

By locking or unlocking the pendulum 16B in this manner, the pendulum 16 can be unlocked to allow the pendulum to operate when transplanting on a sloping ground in the left-right direction. It is advantageous that the pendulum 16B can be locked (incapable of pendulum operation) during traveling such as getting in and out (without transplanting work). In the figure, the lock body 23 is used.
Is provided on the operation side and the through-hole 16F (engaging window 16F) is provided on the pendulum side, but it is also possible to provide it in reverse. Furthermore,
The sensor body 16 may be a liquid sensor having a switch.
Since the switching valve 22 is operated when the switch is off, the switching valve 22 may be an electromagnetic switching valve.

The fluid pressure cylinder 21 has a tube 21A of the cylinder 21 pivotally attached to a bracket 24 attached to a lower portion (lower portion) of the body 1 via a left-right support shaft 24A. Of the piston rod 21B is pivotally connected to the working arm 25A by a pin or the like. The left and right frame 1A of the body 1 is provided with left and right brackets 26 extending downward, and the left and right brackets 26 are provided with connecting rods 25 extending in the left and right direction, whereby the torsional rigidity of the framed body 1 is provided. A cylindrical body 25B is fitted around the connecting rod body 25 so as to be rotatable around the axis, and the cylindrical arm 25B is provided with the above-mentioned working arm 25A as a rearwardly projecting shape.

The left and right ends of the cylindrical body 25B are driven (linked).
One of the arms 25C and 25D protrudes forward and the other protrudes rearward.
A link mechanism 27 constituting the left and right wheel elevating means 20 is linked to 25D. As shown in FIG. 3, the left and right link mechanisms 27 pivotally support left and right first interlocking links 27B via left and right support shafts (pins) 27A in the height direction of the left and right brackets 26, respectively. Of the first interlocking link 27B is vertically oriented, and the lower end thereof is interlocked with the interlocking arm 2 by horizontal support shafts (pins) 27C and 27D.
It is pivotally supported on each of 5C and 25D.

The left and right second interlocking links 27E are pivotally supported on the side of the fuselage on the body side via left and right supporting shafts (pins) 27F, and each of the second interlocking links 27E is disposed in the front-rear direction. The respective front ends thereof are pivotally supported by left and right first interlocking links 27B by pins 27A, and the rear ends of second connection links 27E are pivotally connected to upper ends of left and right third interlocking links 27G by pins 27H. ing. Each of the left and right third interlocking links 27G is pivotally supported by, for example, left and right brackets 28 and the like supporting the transmission case 14 in the middle of the height thereof by left and right pins 27J.

Here, the operating oil from the hydraulic pump 17 is switched via the switching valve 22 by the detection signal of the sensor body 16 or the pendulum motion in the left and right direction, and the single cylinder 2
When the cylinder 21 is extended and contracted by feeding the liquid to the cylinder 1, the cylinder 25B is rotated around the axis of the connecting rod 25 via the operating arm 25A, and this movement is performed by the left and right interlocking links 25C and 25C.
The left and right link mechanisms 27 are interlocked via 25D, and the left and right transmission cases 15 are relatively moved up and down (rotated) about the shaft 14A (one transmission case is upward and the other transmission case is downward). Here, the right and left rear wheels 3 are interlocked with the left and right link mechanisms 27 by the expansion and contraction operation of a single hydraulic cylinder 21 vertically arranged near the center of the body 1 in the left and right direction.
The left and right transmission cases 15 that support the main body 1 are vertically swung relative to the shaft 14A as a fulcrum (center) so that the body 1 can be horizontally controlled.

Further, the above-mentioned left and right third interlocking links 27
G is large and small (long and short) and has a variable length so that it can be exchanged to adjust the height of the support of the body 1 (ground height and ground clearance) by the left and right rear wheels 3 via the right and left transmission cases 15 ( Position can be changed), and the height of the ridge F can be immediately adjusted. Also, if the left and right third interlocking links 27G can be adjusted to expand and contract by a screw structure or the like, it is advantageous because the support height of the body 1 can be adjusted steplessly, and a turnbuckle is used as the screw structure. It is recommended that

Further, since the width of the ridge F is large or small,
It is also recommended that the tread of the left and right rear wheels 3 be adjustable. As an example of this tread adjusting means, as shown in FIG. 4, mounting holes 3B are opened in the left and right axles 3A at an axial interval, while mounting holes are formed in the boss 3C of the disk or spoke of the rear wheel 3. And tread adjustment is performed by inserting and removing the engaging body 3D such as a pin, but of course, tread adjustment using a screw rail structure, a fluid pressure cylinder, or the like is also possible.

[0029]

As described in detail above, according to the present invention,
In order to move the left and right rear wheels relatively up and down, fluid pressure can be used instead of screw feed, and the rear wheels can be quickly moved up and down with good responsiveness, thereby improving the planting accuracy.

[Brief description of the drawings]

FIG. 1 is an overall side view of a transplanter according to the present invention.

FIG. 2 is an overall plan view of the transplanter according to the present invention.

FIG. 3 is a side view of a main part of the transplanter according to the present invention.

FIG. 4 is a plan view of the transplanter according to the present invention.

FIG. 5 is a front view of the transplanter according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Running body 2 Front wheel 3 Rear wheel 16 Sensor body 17 Hydraulic pump 21 Fluid pressure cylinder

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kazuo Shimasumi 38, Sairinji, Yahagi-cho, Okazaki City, Aichi Prefecture Inside the Plow Agricultural Machinery Co., Ltd. Agricultural machinery F term (reference) 2B060 AA08 AC01 AE01 BA04 BB03 BB05 CA12 CB07 CC10 2B063 AA10 AA13 AB01 BA11 BA15 BA25 CB04 3D001 AA09 BA14 CA05 DA17 EA42 EB08 EB15 3D030 DA01

Claims (4)

[Claims] 1. A vehicle comprising a pair of left and right front wheels and a pair of left and right rear wheels, the front and rear wheels supporting a traveling body on which a driver's seat and an engine are mounted. In the horizontal control type transplanter in which the traveling body is controlled to be substantially horizontal by vertically moving, the driver's seat and the engine are arranged apart from each other back and forth, and the right and left rear wheels are substantially true between both. A horizontal control type transplanter characterized in that a horizontal control sensor body and a drive source are arranged on the upper traveling body side. 2. A driver's seat is provided at an intermediate portion in the front-rear direction of the traveling body, an engine is mounted on a rear portion of the traveling body, and a handle for turning the traveling body in a rearwardly extending shape is provided on the traveling body. 2. The horizontal sensor according to claim 1, wherein the sensor body is configured to perform a pendulum movement, the drive source is a hydraulic pump, and includes a switching valve that is switched by the pendulum movement of the sensor body. Controlled transplanter. 3. The sensor device according to claim 2, wherein the sensor unit that moves in a pendulum is provided at a central portion of the traveling body in the left-right direction, and an operation unit that switches the pendulum motion of the sensor unit between a locked state and an unlocked state is provided. The horizontal control type transplanter as described. 4. An oil tank is provided below the engine at a lower rear portion of the traveling body.
4. The horizontal control type transplanter according to any one of items 1 to 3.