JP4110228B2 - Seedling transplanter - Google Patents

Description

[0001]
BACKGROUND 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]
[Prior art]
Conventionally, seedling transplanting machines are provided with a cover ring that is located behind the seedling planting position and rolls on the surface as the aircraft progresses to cover the seedlings after the seedlings are planted. .
[0003]
[Problems to be solved by the invention]
However, in such a conventional configuration, when the earthen ring receives a contact pressure exceeding the upper limit position, the earthen ring is supported by the ground and forced up, causing a running failure due to the lifting of the running wheel, There was a problem of inadvertently damaging the earthen ring itself. Therefore, the present invention allows the vehicle body equipped with the seedling planting device to be controlled to be raised and lowered to a predetermined ground height, and prevents mud soil from entering the cover ring and smoothly rotates the cover ring. Let's make it an issue.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the present invention has taken the following technical means.
A seedling planting field comprising a seedling supply unit (7), a seedling planting device (6), and a covering ring (8) covering the seedlings after seedling planting by the seedling planting device (6) . ground sensor to adapt to uneven change of the surface - (35) detection based on the result provided a vehicle body having the seedling planting device (6) is moved up and down controllably configured to a predetermined ground height of the soil cover wheel It is configured to raise the vehicle body due to the ascending operation of (8) above a predetermined value , and the covered wheel (8) and the walking steering handle (9) projecting rearward from the vehicle body are used as traveling wheels (5 ) And a mud removal cover that prevents the mud from entering the covering ring (8) and is provided so as to be rotatable with respect to the fixed ring shaft (42). A seedling transplanting machine (70) was fixed to the wheel shaft (42) .
[0005]
【The invention's effect】
Therefore , in this seedling transplanting machine, the seedling planting device (6) plants the seedling from the seedling supply unit (7) in the field, and the seedling after planting by the seedling planting device (6) by the cover ring (8). Cover the surrounding area. Further, the vehicle body equipped with the seedling planting device (6) is controlled to move up and down based on the detection result of the ground contact sensor (35) that adapts to the unevenness change of the seedling planting field scene. Then, when the cover ring (8) is raised to a position exceeding the upper limit position, the vehicle body is lifted by the depression of the traveling wheel (5) in relation to this, so that no running failure is caused. In addition, since the vehicle body is lifted, the earthen ring (8) is not subjected to excessive ground pressure load, and accidental damage can be prevented in advance. Further , the earthing wheel (8) is lifted with respect to the vehicle body by depressing the steering handle (9) , and the vehicle body can be lifted, so that the turning operation can be facilitated. In addition, since the mudguard cover (70) is fixed to the wheel shaft (42), the mudguard cover (70) does not rotate and does not carry mud and prevents mud from entering the earthed ring (8). Thus, the earthen ring (8) can be smoothly grounded and rotated.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the drawings.
[0007]
FIG. 1 shows a walking type vegetable seedling transplanting machine 1 as an example of a seedling transplanting machine. This walking type seedling transplanting machine 1 mainly includes an engine 2 and a main transmission case 3 at a front portion of a vehicle body 1A. A pair of left and right front wheels 4, 4 and rear wheels 5, 5 as traveling wheels, and a seedling planting device 6, a seedling supply unit 7, a soil covering pressure reducing wheel 8 and a steering handle 9 are provided at the rear. The seedling transplanter 1 has the front wheels 4 and 4 and the rear wheels 5 and 5 traveling between the ridges so that the body straddles the ridges in the field. It has come to be planted.
[0008]
The motive power in the main transmission case 3 input from the engine 2 is transmitted to the traveling chain cases 10 and 10. A pair of left and right rear wheels 5 and 5 which are traveling wheels are respectively attached to the right and left inner sides of the rotating tip portions of the travel chains 10 and 10, and the airframe is driven by driving the left and right rear wheels 5 and 5. It is supposed to run. Accordingly, the main transmission case 3 is a transmission device that is transmitted to the rear wheels 5 and 5 as traveling wheels.
[0009]
On the other hand, a front wheel support frame 12 extending in the left-right direction is provided at the lower part of the engine mounting table 11 so as to be rotatable around a rolling shaft 13 in the front-rear direction, and front wheels are provided at both left and right ends of the front wheel support frame 12. 4 and 4 are attached.
[0010]
A hydraulic rear wheel raising / lowering cylinder 14 is provided at substantially the center of the front, rear, left and right of the machine body. A hydraulic pump 15 is fixed to the left side of the main transmission case 3, and a hydraulic pressure switching valve case 16 is fixed to the rear of the main transmission case 3. The rear wheel raising / lowering cylinder 14 is operated by switching the hydraulic pressure from the hydraulic pump 15 by operating the rear wheel raising / lowering operation valve 16v in the hydraulic pressure switching valve case 16.
[0011]
A horizontal rod 17 extending to the left and right is provided at the cylinder rod end of the rear wheel lifting cylinder 14, and rear wheel lifting rods 18 and 19 are pivotally attached to the left and right ends of the horizontal rod 17, respectively, and the other ends of the rods 18 and 19. Are connected to the upper arms 10a, 10a fixed to the traveling chains 10, 10, respectively, so that the reed 17 and the traveling chains 10, 10 are connected. Accordingly, when the rear wheel raising / lowering cylinder 14 is expanded and contracted, the traveling chain cases 10 and 10 are moved around the left and right output shafts of the main transmission case 3 via the horizontal rod 17 and the rear wheel raising / lowering rods 18 and 19. The rear wheels 5 and 5 are moved up and down by the rotation of the travel chains 10 and 10 so that the airframe is raised and lowered.
[0012]
The seedling planting device 6 is provided on the rear side of the main transmission case 3 via a planting transmission shaft 20 by power from the main transmission case 3 so as to plant a single seedling in the field. It is transmitted to the planting transmission case 21. Power from the planting transmission case 21 is transmitted to the seedling planting device drive case 23 through the planting chain 22 to drive the seedling planting device 6 and the seedling planting device. Power is branched from the drive case 23 and is transmitted to the seedling placement table left-right movement case 25 of the seedling placement table 24. A slow transmission mechanism 26, a lead cam 27, a lead cam shaft 28, and the like that slow down the left and right moving speed when the seedling planting device 6 scrapes seedlings in the seedling placing table left and right moving case 25, etc. The left and right moving shafts 29 that are transmitted through the left and right through the seedling mounting table left and right moving case 25 are moved left and right, and the first supporting arm 30 and the left and right supporting shafts at both ends of the shaft 29 are moved. 31, the seedling mounting table 24 is moved in the horizontal direction through the left and right second support arms 32.
[0013]
In addition, the seedling supply unit 7 moves the seedling placement table 24 that moves the seedling one by one in the lateral direction, and the seedlings on the seedling placement table 24 at the end of the left and right movement of the seedling placement table 24. A seedling feeding belt 33 is provided for feeding rearward, and the paper pot seedlings on the seedling placement table 24 are collected one by one at a seedling outlet provided on the rear end side of the seedling placement table 24. The seedling planting device 6 is scraped by the seedling planting device 6 behind the seedling mounting table 24, and the seedlings scraped by the seedling planting device 6 are transported to the soil surface and planted in the field.
[0014]
The seedling planting device 6 operates while drawing a closed loop-like locus K that is long in the vertical direction.
Further, a hole making body 34 is provided in front of the seedling planting device 6 so as to be lifted and lowered to intermittently form a planting hole in a farm scene, and the seedling is formed in the planting hole formed by the hole making body 34. The planting device 6 is adapted to plant seedlings.
[0015]
Further, a grounding sensor 35 is provided in front of the seedling planting device 6 to sense the unevenness change while adapting to the unevenness change in the field. The ground sensor 35 is provided so as to be rotatable about a left and right axis 36, and the rod 37a. Bifurcated arm 38a. The rear wheels 5 and 5 are controlled to be raised and lowered by the seedling planting device 6 by operating the rear wheel lifting operation valve 16v in the hydraulic pressure switching valve case 16 via the rod 37b and the like. ing.
[0016]
A pair of left and right soil covering pressure reducing wheels 8 are provided at a rear position of the seedling planting position, and are supported by bearings on a pressure reducing wheel support frame 40 that can swing up and down about a horizontal axis 39. The pair of left and right soil covering pressure reducing wheels 8 and 8 are supported by bearings obliquely so that the distance between them becomes narrower at the lower part, that is, fixed to a support member 41 extending downward from the pressure reducing wheel support frame 40. After the bearing is rotatably held with respect to the wheel shaft 42 and is urged downward by a spring 44 loosely fitted to the lifting rod 43 described later, the rolling of the heel surface as the machine progresses and the seedling being planted The soil surrounding the seedling planting hole is collapsed to refill the hole and lightly crush the trace.
[0017]
The elevating rod 43 is supported by penetrating a stage 45 fixed to a steering handle 9 protruding rearward from the vehicle body 1A, and is configured to be slidable up and down. Further, a weight 46 passes through the lifting rod 43 between the pressure-reducing wheel support frame 40 and the spring 44.
When the rising position of the soil covering pressure reducing wheel 8 with respect to the vehicle body reaches a position exceeding the upper limit, the pressure reducing wheel support frame 40. Reducing wheel lifting rod 47a. Oscillating arm oscillating around the spindle 48 49. Connecting rod 47b. Bifurcated arm 38b. The rear wheel raising / lowering operation valve 16v in the hydraulic pressure switching valve case 16 is operated in the hydraulic pressure increasing direction via the rod 37b or the like to push down the rear wheel 5 to lift the machine body. One end of the connecting rod 47b is connected to the bifurcated arm 38b, while the other end is connected and held to the swinging arm 49 through a long hole 50 provided to have play. In short, the raising / lowering control of the rear wheel 5 by the ground sensor 35 is freely performed only within the range of play by the long hole 50.
[0018]
By the way, a roller 51 is provided behind the horizontal rod 17 that moves back and forth by the rear wheel elevating cylinder 14 so that the horizontal rod 17 contacts when the rear wheel elevating cylinder 14 extends more than a predetermined amount. The roller 51 is attached to a rocking arm 49 supported by the planting transmission case 21, and the pressure-reducing wheel support frame from the rocking arm 49 via the pressure-reducing wheel lifting / lowering rod 47a. 40. Accordingly, when the rear wheel 5 is lowered from a predetermined height, the rocking arm 49 is rocked, the pressure-reducing wheel support frame 40 is rotated upward, and the covering soil pressure-reducing wheel 8 is forcibly raised. As a result, it is possible to prevent the cover soil pressure wheel from breaking the heel when the aircraft is turning, and the operator can easily perform the turning operation.
[0019]
The steering handle 9 is provided so as to project rearward and upward from the vehicle body 1A. The soil covering pressure reducing wheel 8 and the steering handle 9 are installed behind the traveling wheel, that is, behind the rear wheel 5.
In the vicinity of the steering handle 9, the main clutch lever 52 that can turn on and off the driving of the rear wheels 5, 5 and the seedling planting device 6, and the raising / lowering operation of the machine body by the rear wheel lifting cylinder 14 and the seedling planting device 6. A planting / elevating lever 53 that can only be turned on and off is provided.
[0020]
Further, side clutch levers 54, 54 are provided below the left and right grips of the steering handle 9, and the left and right rear wheels 5, 5 are driven by operating the side clutch levers 54, 54. It has come to sever. Then, the operator depresses the steering handle 9 and operates the left and right side clutch levers 54 with the front wheels 4 and 4 floating in the air to cut off the driving of the left and right rear wheels 5. The aircraft is turned around the center.
[0021]
When turning, when the steering handle 9 is pushed down until the covering soil pressure reducing wheel 8 reaches a position exceeding the upper limit position for raising the vehicle body, the pressure reducing wheel support frame 40 is lifted. By acting in the raising direction and pushing down the rear wheel 5, the machine body is lifted and turning is facilitated.
In the embodiment shown in FIG. 6, when the steering handle 9 is pushed down, the lifting rod 43 interlocked with the pressure-reducing wheel support frame 40 rises, and the pivoting arm in which the pin 55 rotates around the fulcrum shaft 56. One end side of the arm 57 is pushed up, and the other end side of the arm 57 is pushed down, so that the rear wheel raising / lowering operation valve 16v acts in the raising direction via the hydraulic cable 58, and the rear wheel 5 is lowered. Therefore, the aircraft rises and is configured to be easy to turn.
[0022]
Further, in the embodiment shown in FIGS. 7 and 8, in the rear wheel elevating operation valve 16v, the valve arm Va for operating the valve 16v is connected to a sensor rod 37b interlocked with the ground sensor 35. The valve arm Va is provided with a neutral holding spring 59 for holding the valve at all times to return to the neutral position in order to prevent hunting. The neutral holding spring 59 holds the neutral position of the valve arm Va, so that the sensor sensitivity can be lowered and hunting caused by being too sensitive can be prevented. The hydraulic switching valve case 16 is provided with a notch on the end face of the case to form a stopper portion 16a, and the protrusion Vb provided on the valve arm Va is engaged so that the valve can move within the range. It is configured to regulate. An operation tool 60 having a long hole 60a is provided at the end of the hydraulic cable 58, and is engaged with a locking pin Vc provided on the valve arm Va. A tension spring 60s holds the operating tool 60 in the direction in which the rear wheel lifting operation valve 16v is acted in the upward direction.
[0023]
In FIG. 9, a support rod 62 that supports the seedling collecting plate 61 is configured to be able to be inserted into and removed from the seedling placement table 24 in the front-rear direction. At the time of seedling replenishment, the support rod 62 is pulled forward to support the seedling collecting plate 61 in a seedling supply inclined posture. In short, the seedling plate 61 is supported at the base end by the support rod 62 at the high position and the tip end side is inclined so as to face the start end of the seedling feeding belt 33 at the low position, and the pot seedling on the seedling plate is placed. Are slid onto the seedling feeding belt 33. In the case of a pot seedling, there is a problem that the pot seedling collapses if the seedling is rapidly supplied. However, if the seedling plate is used, the seedling can be easily replenished and is smooth, and this problem is solved. Can do.
[0024]
Further, a guide frame 64 for guiding the seedling feed amount adjusting lever 63 is attached to the seedling mounting table 24 main body side. As shown in FIG. 10, the guide frame 64 is provided with a locking recess 65 that locks the lever 63 at an arbitrary operation position. Reference numeral 66 shown in FIG. 11 is a stopper, and 67 is a seedling feeding arm.
The embodiment shown in FIG. 12 has a configuration in which a scraper 68 is provided on the soil covering pressure reducing wheel 8. In other words, the scraper 68 is formed by bending a resilient rod-like bowl-like body into an L shape to form a scraper portion 68a, and the attachment side is bent into a U shape. The mold attaching portion 68b is configured to be fastened and fixed to the wheel shaft 42 of the soil covering pressure reducing wheel 8 with a single bolt 69. Therefore, according to such a scraper, it is possible to easily and easily perform attachment and adjustment to the soil covering pressure reducing wheel, and since it has elasticity, the scraper function can also be effectively performed. Moreover, as shown in FIG. 13, even if the soil covering pressure reducing wheels (a) and (b) have different diameters, they can be easily adjusted correspondingly.
[0025]
14 and 15 show a configuration example in which a mud removing cover 70 for preventing mud intrusion is provided on the soil covering pressure reducing wheel 8. The mud cover 70 is fitted and fixed to the wheel shaft 42 through a seal 71. The wheel shaft 42 is fixed, and the soil covering pressure reducing wheel 8 is rotatably fitted to the fixed wheel shaft 42. Therefore, since the cover 70 does not rotate, no mud is carried around. Since there is no intrusion of mud, the soil covering pressure wheel smoothly rotates on the ground.
[0026]
FIG. 16 shows another embodiment of the soil covering pressure reducing wheel 8. As shown in FIG. 16 (a), the outer peripheral portion of the iron wheel 72 is integrally formed with a rubber mold 73. As shown in FIGS. 16 (b) and 16 (c), by providing some unevenness on the peripheral surface of the rubber mold 73, the suppression effect is increased. Even if the cover soil pressure wheel interferes with the seedling planting device, the rubber deforms and escapes, so there is no mechanical lock. When the material is rubber, it is difficult to get dirt, so the pressure-reducing effect can be enhanced.
[0027]
Also, as shown in FIG. 17 (a), the same effect as in the case of the rubber mold can be obtained by covering the outer periphery of the soil covering pressure reducing wheel 8 with an elastic supporter 74 as shown in FIG. 17 (b). Can be played. The end portion of the supporter after covering with respect to the soil covering pressure reducing wheel is configured to be held by the mud removing cover 70.
[Brief description of the drawings]
[Fig. 1] Side view of a seedling transplanter [Fig.2] Side view showing a part of the operation mechanism of the seedling transplanter [Fig.3] Plan view of a seedling transplanter [Fig. FIG. 5 is a cutaway rear view showing a soil covering pressure reducing wheel. FIG. 6 is a side view of a main part showing another embodiment. FIG. 7 is a side view showing an operating mechanism of a hydraulic valve. [Fig. 9] Side view of seedling transplanting machine [Fig. 10] Plan view of part of seedling transplanting machine [Fig. 11] Plan view of the main part of the above [Fig. [Fig. 14] Cut side view of the soil covering pressure ring [Fig. 15] Side view of the mud cover [Fig. 16] (B) Side view, (B) Side view [Fig. 17] (A) Cut rear view of soil covering pressure reducing wheel, (B) Side sectional view of supporter [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Seedling transplanter, 5 ... Rear wheel , 6 ... Seedling planting device , 7 ... Seedling supply part, 8 ... Covering soil pressure wheel , 9 ... Steering handle , 35 ... Ground sensor , 42 ... Wheel shaft , 70 ... Mud removal cover

Claims (1)

A seedling feeder (7), a seedling planting device (6), and a covering ring (8) covering the seedlings after seedling planting by the seedling planting device (6) , ground sensor to adapt to uneven changes - (35) of the detection result to the vehicle body with the seedling planting device (6) is provided with lifting controllably configured to a predetermined ground height based, the soil cover wheel (8 ) To raise the vehicle body due to the above-mentioned ascending operation, and the traveling wheel (5) includes the covering wheel (8) and a walking steering handle (9) protruding rearward from the vehicle body. And a mud cover (70) for preventing the mud from entering the covering ring (8) and providing the covering ring (8) so as to be rotatable with respect to the fixed ring shaft (42). ) Is fixedly attached to the wheel shaft (42) .

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