JP2001088751A - Seedling transplanting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem of being unable to travel on a ridge narrow in width as left and right travelling crawlers travel along valley parts on both sides normally straddling over the ridge and treads of the left and right crawlers automatically become larger when left and right width of a frame body is large and to settle a problem of being unable to plant a seedling in a center of the ridge as the frame body tends to flow to the lower side of an inclined surface and keeps a snaking sate with a bad rectilinear propagating property at the time when the crawlers travel on a slant surface. SOLUTION: This seedling transplanting machine has a characteristic of being furnished with a pair of left and right travelling wheels on the front side of a car body and a pair of left and right travelling crawlers on the rear side and inclining the left and right travelling crawlers so that the grounding sides inclined in a reverse open upward shape so that the grounding side comes to be inside in the left and right directions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling transplanter for transplanting seedlings such as vegetables, and belongs to the technical field of agricultural machinery.

[0002]

2. Description of the Related Art Conventionally, in this type of seedling transplanter, a wheel-type running wheel is provided on the front side of a vehicle body and a conventional rear wheel is provided on a rear side, and a running cloth having advantages in stability and running performance is provided. The technology using the laser is known as the prior application technology.

[0003]

The left and right traveling crawlers normally travel along valleys on both sides of the ridge. However, if the left and right widths of the body are large, the treads of the left and right crawlers naturally occur. And running on narrow ridges is not possible. Also, in the case of work on an inclined ridge, when the crawler travels on a slope, the airframe becomes easier to flow below the slope, and the straightness is poor and follows the meandering state. There was a problem that it could not be planted in the center of the furrow.

[0004]

According to the present invention, the following technical measures are taken to solve the above-mentioned problems. That is, a first concrete means for solving the problem in the present invention is characterized in that a pair of left and right traveling crawlers are inclined in an inverted C shape so that the ground contact side is inside in the left and right direction. . This makes it possible to reduce the ground tread of the left and right crawlers relative to the body.

A second concrete means for solving the problems in the present invention is that, in addition to the first concrete means, the right and left traveling crawlers are moved up and down independently with respect to the vehicle body to raise and lower the body. The vehicle is provided so as to be controlled so as to be displaced outward in the left-right direction as the traveling crawler with respect to the vehicle body descends so that the ground contact side of the crawler descends. As a result, the ground contact position of the lowered crawler is displaced outward from the center of the fuselage during the vertical movement control of the fuselage on a slope, so that even if the fuselage attempts to flow to the lower slope, the position of the fuselage is corrected to the upper slope. Seedlings can be transplanted to the top of the ridge.

A third concrete means for solving the problem in the present invention is such that, in addition to the first concrete means, the left and right traveling crawlers are rotatable and fixed around a longitudinal axis. It is characterized by having. Thereby, the tread adjustment of the right and left crawlers can be arbitrarily changed.

[0007]

As described above, according to the present invention, the ground treads of the right and left crawlers with respect to the fuselage can be reduced, so that the vehicle can run on narrow ridges. In addition, since the vehicle can travel with the ridge sandwiched between the grounding portions of the left and right crawler, the straightness can be improved.

In addition, when the body is lifted and lowered on a slope, the ground contact position of the crawler on the lowered side is displaced outside the center of the body, so that seedlings can be transplanted to the apex of the ridge. Furthermore,
Since the left and right crawlers are configured to be rotatable and fixed around the longitudinal axis, tread adjustment is possible and adjustment according to the ridge width is possible.

[0009]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a walking-type vegetable seedling transplanter 1 as an example of a seedling transplanter.
The vehicle is mainly provided with an engine 2, a main transmission case 3 and a pair of left and right running wheels 4, 4 on the front side of the vehicle body 1A, a running crawler 5, 5 on the rear side, a seedling planting device 6 on the rear side, and a seedling. Supply unit 7,
It is configured to include a soil cover pressure wheel 8 and a steering handle 9. In the seedling transplanter 1, the traveling wheels 4, 4 and the traveling crawlers 5, 5 run in the ridges so that the aircraft crosses the ridges in the field, and the seedling transplanter 6 Planting seedlings.

The traveling crawler 5 comprises a driving sprocket wheel 10, a driven wheel 11, and a crawler wheel 12 which rotates between these two wheels. Drive shaft 1
The driven wheel 11 is installed via a driven shaft 15 at the tip of a crawler support arm 14 that can swing around 3.

The left and right traveling rollers 5, 5 are configured to be inclined in an inverted C-shape in rear view so that the ground contact side is inside and the non-ground contact side is obliquely outside. In other words, the drive shaft 13 on which the drive sprocket wheel 10 is mounted is supported by a wheel case 16 which is horizontally horizontal, while the driven shaft 15 on which the driven wheel 11 is mounted is laterally However, the driven wheel 11 is tilted up and down so that the inner end is higher and the outer end is lower, and the driven wheel 11 holds the camber angle θ. The rubber belt 12 is twisted.

A main drive cable input from the engine 2
The power in the wheel 3 is transmitted from the drive shaft 13 to the drive sprocket wheel 10 of the traveling crawler 5.
At the approximate center of the front, rear, left and right of the body, a hydraulic crawler lifting cylinder 18 is provided. A hydraulic pump 19 is fixedly provided on the left side of the main transmission case 3 and a hydraulic pressure switching valve case 20 is fixedly provided on a rear portion of the main transmission case 3. The crawler lifting / lowering cylinder 18 is operated by switching a hydraulic pressure from the hydraulic pump 19 by operating a crawler lifting / lowering operating valve 20v in the hydraulic switching valve case 20.

A horizontal rod 21 is provided at the cylinder rod end of the crawler lift cylinder 18 so as to extend left and right.
The left and right ends of each of the rods 1 are pivotally connected with a lifting rod 22 and the other end of the rod 22 is pivotally connected to an upper arm 17 fixed to each of the roller supporting arms 14. The horizontal rod 21 and the crawler support arm 14 are connected. Accordingly, the crawler support arm 14 is rotated around the left and right output drive shafts 13 of the main drive case 3 via the horizontal rod 21 and the crawler lift rod 22 by the expansion and contraction of the crawler lifting cylinder 18. Is rotated, and the crawler support arm is rotated.
The rotation of the arm 14 causes the crawler 5, 5 to move up and down so that the airframe moves up and down.

A horizontal hydraulic cylinder 23 which is operated by hydraulic pressure from a hydraulic pump 19 is provided in a middle portion of the rod 22 so as to extend and retract the rod 22. The crawler 5 on the other side is moved up and down with respect to the up and down position of the crawler 5 on one side by expansion and contraction so that the body can be maintained horizontally horizontally regardless of the unevenness of the valleys of the ridges. A left and right tilt sensor 24 of a pendulum type is provided on the side of the main transmission case, and the hydraulic switching valve case is detected by the detection of the left and right tilt sensor 24.
The horizontal hydraulic cylinder 23 is operated via a horizontal operation valve 20 s provided in the gear 20 to maintain the machine body horizontally horizontally.

As described above, the left and right crawlers are independently moved up and down to maintain the body horizontally, but the cradle on one side is maintained.
When the crawler on the other side of the crawler descends (when the valley of the ridge becomes deeper), the crawler is configured to be displaced outward as the ground contact side of the crawler descends. In other words,
La and 5, rotate up and down around the drive shaft 13,
In this case, since the driven wheel 11 is inclined in an inverted U shape when viewed from the rear, the lower the crawler descends, the more it descends from the center of the fuselage as it descends (the camber angle θ _1).
→ θ ₂ changes) so as to.

Further, the left and right crawlers 5, 5 are arranged in the front-rear direction axis 2.
5 so as to be freely rotatable and fixed. That is,
A support shaft 25b supporting the driven wheel 11 is provided. The support shaft 25b supports the driven wheel 11. The support shaft 25b is rotatably fixed to the support pipe 25a. It is inserted and slidably fixed. The driven wheel 11 can be adjusted to an arbitrary inclination angle, and after the adjustment, the driven wheel 11 is integrally fastened and fixed via a fastening fixture 26.

The seedling planting apparatus 6 has a planting claw 27 for planting one seedling in a field, and operates while drawing a closed loop-like trajectory K that is long in the vertical direction. In addition, the seedling supply unit 7 is configured to move the seedling mounting table 28 to move left and right in the horizontal direction by one strain of the seedling, and to transfer the seedlings on the seedling mounting table 28 by one strain at the end of the left and right movement of the seedling mounting table 28. A seedling feeding belt 29 for feeding the seedling mounting belt 29 is provided at the rear end of the seedling mounting table 28 at the rear end side.
8 are scraped by the planting claw 27 of the seedling planting device 6 at the rear of the seedling mounting table 28 for each plant, and the seedlings scraped by the planting claw 27 are transported to the soil surface. And planted in a field.

Further, in front of the seedling planting apparatus 6, there is provided a grounding sensor 30 for sensing the change in the unevenness while adapting to the change in the unevenness in the field scene. The grounding sensor 30 is rotatably provided about a left-right axis 31. The rod 32a. Bifurcated arm 33a. By operating the crawler lifting / lowering operation valve 20v in the hydraulic switching valve case 20 via the rod 32b or the like, the traveling crawler 5, 5 is controlled to be raised and lowered by the seedling planting device 6 so as to have a predetermined planting depth. It has become.

A pair of left and right cover soil pressure reducing wheels 8 are provided at the rear position of the seedling planting position, and are supported by bearings on a pressure reducing wheel support frame 35 which can swing up and down around a horizontal axis 34. The pair of left and right covering soil pressurizing wheels 8 and 8 are diagonally held by bearings so that the lower part thereof becomes closer to each other, and the lifting rod 3
6, which is urged downward by a spring 37 loosely fitted thereto, which rolls on the ridge surface as the machine advances, and collapses the soil around the seedling planting hole after the seedlings have been planted. And gently suppress the traces.

The lifting rod 36 is supported by a stay 38 fixed to the steering handle 9 projecting rearward from the vehicle body 1A, and is configured to be vertically slidable. Also,
A weight 39 is mounted on the lifting rod 36 between the pressure-reducing wheel support frame 35 and the spring 37.

When the raised position of the cover wheel 8 with respect to the vehicle body exceeds the upper limit, the support frame 35.
Compression wheel elevating rod 40a. A swing arm 42 swinging around a support shaft 41; Connecting rod 40b. Bifurcated arm 33b.
The crawler lifting / lowering operation valve 20v in the hydraulic pressure switching valve case 20 is operated in the direction of increasing the hydraulic pressure via the rod 32b or the like to push down the crawler 5 and lift the machine body.

One end of the connecting rod 40b is connected to the swing arm 42, and the other end is connected and held to the forked arm 33b through a long hole 43 provided with play. In short, the lifting / lowering control of the crawler 5 by the ground contact sensor 30 is freely performed only within the range of the play by the long hole 43.

A plurality of adjusting holes 44a, 44b, 44c... Are provided at one end of the connecting rod 40b, and by changing the connecting position of the connecting pin 45 to the oscillating arm 42, the soil pressure can be reduced. The control sensitivity of the lifting / lowering control of the body by the wheel 8 can be changed and adjusted. Thereby, even if the ground contact sensor 30 comes off the ridge at the end of the ridge,
The aircraft can be prevented from descending when it is on the ridge.

A roller 46 is provided behind the horizontal rod 21 which is moved back and forth by the crawler lifting cylinder 18 when the crawler lifting cylinder 18 extends beyond a predetermined length. ing. The roller 46 is attached to a swing arm 42 supported by a planting transmission case, and a pressure-reducing wheel support frame 35 is provided from the swing arm 42 via a pressure-reducing wheel elevating rod 40a. It is connected to. Therefore,
When the crawler 5 descends below a predetermined height, the swing arm 42 swings, and the crushing wheel support frame 35 rotates upward, and the soil crushing wheel 8 is forcibly raised.

The steering handle 9 is provided so as to project rearward and upward from the vehicle body 1A. A main clutch lever 47 capable of turning on and off the drive of the traveling crawler 5 and the seedling planting device 6 is provided in the vicinity of the control handle 9. 6 is provided with a planting / elevating lever 48 that can only turn on and off the drive.

Below the left and right grips of the steering handle 9, side clutch levers 49, 49 are provided, and by operation of the side clutch levers 49, 49, a pair of left and right traveling rollers 5, 5 are provided. One of the left and right drives is cut off. Then, while the operator pushes down the steering handle 9 and lifts the traveling wheels 4 and 4 in the air, the operator operates one of the left and right side clutch levers 49 to cut off the driving of one of the left and right traveling rollers 5, and -The aircraft is to be turned around the la 5.

Another embodiment shown in FIG. 8 will be described. ,
FIG. 8 shows an example of a walking rice transplanter in which a crawler-type traveling device is used in place of a conventional paddy wheel.

In the case of the conventional wheels, a large driving reaction force is applied when the vehicle is moving backward, and the body lowers forward, so that a large force is required to push down the steering wheel. On the other hand, in the case of the crawler, the front grounding portions of the left and right crawler 5, 5 become resistance, do not receive the driving reaction force, do not require a large force to push down the steering wheel, and move backward smoothly. Can be.

In short, E is an engine of a rice transplanter, 50 is a seedling transplanter, 51 is a seedling loading tank that reciprocates left and right, 5
2 denotes a steering handle, and 53 denotes a float. Running black
The ra 5 comprises a driving sprocket wheel 10, a driven wheel 11, and a crawler belt 12 wound between the two wheels.

FG indicates a front grounding portion of the crawler.

[Brief description of the drawings]

FIG. 1 is a side view of a seedling transplanter.

FIG. 2 is a schematic plan view of a main part of the seedling transplanter.

FIG. 3 is a rear view of a main part of the above.

[FIG. 4] A ₁ : side view, B ₁ : rear view, A of the traveling crawler
_2: a side view, B _2: rear view

FIG. 5 is a side view of a traveling crawler.

FIG. 6 is a rear view of the traveling crawler.

FIG. 7 is a side view of a main part of the seedling transplanter.

FIG. 8 is a side view of the rice transplanter.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 seedling transplanter, 1A body 2 engine 3 main drive case 4 running wheel 5 running crawler 6 seedling planting device 7 seedling supply unit 8 soil crushing wheel 9 operation handle 10 drive sprocket wheel 11 driven wheel 12 Crawler Travel 13 Drive Shaft 14 Crawler Support Arm 15 Follower Shaft 16 Wheel Case 17 Upper Arm 18 Crawler Elevating Cylinder 19 Hydraulic Pump 20 Hydraulic Switching Valve Case 21 Horizontal Rod 22 Elevating Rod 23 Horizontal hydraulic cylinder 24 Left-right tilt sensor 25 Front-rear axis 26 Tightening fixture 27 Planting claw 28 Seedling table 29 Seedling feed belt 30 Grounding sensor

Continued on the front page (72) Inventor Masahiro Takemoto 1-Yachikura, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. F-term (Reference) 2B060 AA04 AC01 AE02 BA03 BA07 BB05 CA09 CA12 CA13 CB02 DA02 DA04 DA05 DA07

Claims (3)

[Claims] 1. A seedling transplanter characterized in that a pair of left and right traveling crawlers are inclined in an inverted C shape so that the ground contact side is inside in the left and right direction. 2. The vehicle according to claim 1, wherein the right and left traveling crawlers move up and down independently of each other with respect to the vehicle body so that the vehicle body is lifted and lowered.
2. The seedling transplanter according to claim 1, wherein the seedling transplanter is configured to be displaced outward in the left-right direction as the ground contact side of the la is lowered. 3. 3. The seedling transplanter according to claim 1, wherein the left and right traveling rollers are configured to be rotatable and fixed around a longitudinal axis.