JP2001258321A - Transplanter keeping controlled horizontal state - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of conventional horizontal state controlling driver of a transplanter comprising the slow action and early failure of a screw owing to the mechanism of the driver to lift or lower the right and left rear wheels relative to each other by the screw-feeding with a screw shaft driven by a motor. SOLUTION: A hydraulic cylinder 21 attached to the transplanter body 1 in longitudinal direction is used as the driving member for lifting and lowering the right and left rear wheels 3 relative to each other.

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.

[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 (for example, see Japanese Patent No. 2569226).

[0003]

According to the prior art disclosed in the above-mentioned publication, a transmission case for driving and supporting left and right rear wheels is linked to a motor via a wheel lifting mechanism supported by a bracket fixed to the body. The pair of left and right rear wheels are moved up and down in opposite directions by forward and reverse rotation of the motor. That is, the motor has a screw shaft that is turned forward and reverse, and the screw shaft is screwed into the female screw portion of the swing lever.

In this case, since the motor is used, the horizontal control (the vertical movement of the pair of right and left rear wheels) is slow, and the response is poor. In addition, if the threaded portion between the screw shaft and the female screw shaft is exposed to rainwater or soil adheres, it causes rusting. Especially in the field, it is difficult to prevent smooth operation because the soil cannot be adhered. There was a problem in terms of durability. Further, the screw shaft must be provided with its axis centered in the front-rear direction, which increases the front-rear space, which increases the distance between the pair of left and right front wheels and the pair of left and right rear wheels (wheel distance), and When performing a turning operation on the ground or the like, there is a problem that not only the turning distance is increased and the field is roughened, but also the turning performance is deteriorated, such as an excessive force for pushing and pulling a handle for turning.

An object of the present invention is to provide a horizontal control type transplanter in which the above-mentioned problems have been solved.

[0006]

The present invention comprises a pair of left and right front wheels 2 and a pair of left and right rear wheels 3 and a wheel elevating means 20 for relatively moving the pair of right and left rear wheels 3 up and down. In order to achieve the above-mentioned object, the following technical measures are taken in the horizontal control type transplanter configured to control the body 1 substantially horizontally by the operation of the wheel lifting / lowering means 20. That is,
In the horizontal control type transplanter according to the first aspect, the driving body that operates the wheel lifting / lowering means 20 is a hydraulic cylinder 21 that expands and contracts, and the cylinder 21 is disposed on the machine body 1 side with the axial center of the cylinder 21 being vertically oriented. It is characterized by having.

[0007] Since such a configuration is adopted,
The threaded part like the conventional example is not necessary, and
Rotational malfunction due to foreign matter being caught in the threaded portion is eliminated, and responsiveness is improved, resulting in lightness, quickness, and improved durability. Further, since the fluid pressure cylinders 21 are arranged vertically, the front-rear length (vehicle distance) of the body 1 can be shortened, the turning property (small turning property) on the headland is improved, and the field is not roughened, and the steering wheel is not damaged. The operation became lighter. In the above-mentioned claim 1, the wheel elevating means 20 comprises a pair of left and right rear wheels 3.
The left and right link mechanisms 27 are configured to move up and down the left and right transmission cases 15 that drive the
It is recommended that there be a single hydraulic cylinder 21 that moves up and down relatively (claim 2).

Further, in the above-mentioned claim 2, the working arm 25A for interlocking the left and right link mechanisms 27 is provided with the body 1
The fluid pressure cylinder 21 is pivotally connected to the working arm 25A by being provided on a cylindrical body 25B fitted around the connecting rod body 25 erected in the left and right direction so as to be rotatable around the axis. Is recommended (claim 3). This claim 3
According to this, the torsional rigidity of the body 1 can be enhanced by the connecting rod 25, and the planting accuracy and traveling performance can be 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 above in detail, according to the present invention, by arranging the fluid pressure cylinders for horizontal control in the vertical direction, not only the front-rear length of the airframe can be shortened and turning performance can be improved, but also responsiveness can be improved. As a result, the left and right rear wheels can be moved up and down relatively and quickly.

[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 20 Wheel lifting / lowering means 21 Fluid pressure cylinder 27 Link mechanism

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kazuo Shimasumi 38, Sairinji, Yahagi-cho, Okazaki-shi, Aichi Prefecture, Japan Plow handle Agricultural Machinery Co., Ltd. Agricultural machinery F term (reference) 2B060 AA02 AA04 AC01 AE02 BA04 BB03 BB05 CA12 CB07 CC10 DA02 DA05 DA07 2B063 AA04 AA14 AB01 AB08 BA16 BA24 BA25 CB04

Claims (3)

[Claims] 1. A vehicle comprising a pair of left and right front wheels (2) and a pair of left and right rear wheels (3), and a wheel elevating means (20) for relatively vertically moving the pair of left and right rear wheels (3). In the horizontal control type transplanter configured to control the body (1) substantially horizontally by the operation of the wheel lifting / lowering means (20), a driving body that operates the wheel lifting / lowering means (20) is a hydraulic cylinder that expands and contracts. (21) A horizontal control type transplanter characterized in that the cylinder (21) is arranged on the machine body (1) side with the axis of the cylinder being vertical. 2. The wheel lifting means (20) is composed of left and right link mechanisms (27) for vertically moving left and right transmission cases (15) for driving a pair of left and right rear wheels (3). The horizontal control type transplanter according to claim 1, wherein the hydraulic cylinder (21) for vertically moving the mechanism (27) relatively is provided. 3. An operating arm (25A) for interlocking the left and right link mechanisms (27) is rotatable about an axis around a connecting rod (25) provided in the lateral direction on the body (1) side. The horizontal control implanter according to claim 2, wherein the hydraulic cylinder (21) is provided on the fitted cylinder (25B), and the fluid pressure cylinder (21) is pivotally connected to the working arm (25A).