JP2001161118A - Seedling transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems that the surrounding soil is sometimes destroyed and dropped into a hole formed by a perforating unit and trouble is caused in raising of seedlings after planting when the lower part of the perforating unit opens in a conventional constitution of a seedling transplanter of the constitution for conventionally periodically lifting and lowering a bill-like perforating unit having a pointed lower end, thrusting the perforating unit into soil at the bottom dead center or its vicinity in a lifting and lowering stroke, opening the lower part, boring a hole for planting a seedling and planting the seedling in the hole when the perforating unit thrusts into the soil. SOLUTION: This seedling transplanter is characterized as installing the perforating unit 26 capable of periodically lifting and lowering, thrusting into the soil at the bottom dead center of the lifting and lowering or its vicinity, opening the lower part and boring the hole for planting the seedling when thrusting into the soil and further arranging a pressurizing tool 40 for pressurizing the top soil surface around the perforating unit 26 when the lower part of the perforating unit 26 thrusts into the soil to open.

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 A beak-shaped drilling body having a sharp lower end periodically rises and falls, and at or near the bottom dead center of the ascending and descending strokes, the drilling body penetrates into the soil and enters the soil. There is a seedling transplanter in which the lower part is sometimes opened to make a hole for planting seedlings, and seedlings are planted in the holes.

[0003]

In such a conventional seedling transplanter, when the lower part of the drilling body is opened, the surrounding soil may collapse and fall into the hole formed by the drilling body. There was a problem that hindered the growth of seedlings.

[0004]

In order to solve the above-mentioned problems, the present invention takes the following technical means. That is,
The seedling transplanter according to the first aspect of the present invention moves up and down periodically and rushes into the soil at or near the bottom dead center of the raising and lowering. And a pressing tool that presses the top soil surface around the hole when the lower part of the hole penetrates into the soil and opens.

According to a second aspect of the present invention, there is provided the seedling transplanter according to the first aspect, wherein the pressing tool is pressed outwardly in a plane parallel to a field scene with respect to the pressing or drilling body. And is pressed. Furthermore, a seedling transplanter according to a third invention is characterized in that in the seedling transplanter according to the first invention or the second invention, the pressing tool is formed of an elastic body.

The seedling transplanter according to a fourth aspect of the present invention moves up and down periodically, rushes into the soil at or near the bottom dead center of the up and down movement, and when the rushes into the soil, the lower part opens to raise the seedling. It is provided with a drilling body for drilling a hole for planting, the drilling body has a configuration in which the lower part is divided into front and rear and opens, and the front and rear inclination angles of the outer surface on one side of the lower part of the drilling body are other side. Is characterized in that it is configured to be asymmetric so as to be larger than the front and rear inclination angles of the outer surface.

[0007]

In summary, the seedling transplanter according to the present invention is such that when the lower part of the drilling body enters the soil and opens, the top soil surface around the drilling body is compacted by the pressing tool. The collapse of the soil into the hole is eliminated. Therefore, since the seedlings after planting are not covered with soil, the growth of the seedlings can be accelerated.

[0008]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a walking type 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 and running wheels. A pair of left and right front wheels 4 and 4 and rear wheels 5 and 5 are provided with a seedling planting device 6, a seedling supply unit 7, a soil-reducing wheel 8 and a steering handle 9. In the seedling transplanter 1, the front wheels 4, 4 and the rear wheels 5, 5 run in the ridges so that the aircraft crosses the ridges in the field, and the seedling planting device 6 transfers the seedlings to the left and right centers of the upper surface of the ridges. They are being planted.

At the left and right ends of the main drive case 3, the main drive case is provided.
Travel extension case 1 rotatable with respect to case 3
The right and left traveling extension cases 10 and 10 are fixedly provided at the respective ends of the left and right traveling extension cases 10 and 10, respectively. Therefore,
The motive power in the main transmission case 3 input from the engine 2 is transmitted to the traveling chain cases 11 and 11. A pair of right and left rear wheels 5, which are running wheels, are provided on the left and right inner sides of the turning end portions of the running chain cases 11, 11, respectively.
5 are attached, and the body travels by driving the pair of right and left rear wheels 5 and 5. Accordingly, the main transmission case 3 is a transmission that transmits power to the rear wheels 5, 5 as running wheels. On the other hand, a front wheel supporting frame 12 extending in the left-right direction is provided at the lower part of the engine mounting base so as to be rotatable around a rolling shaft 13 in the front-rear direction. , 4 are attached.

The left and right traveling extension cases 1
Numerals 0 and 10 are configured to extend and contract in the left and right lateral directions (the rear wheel drive shaft is also extended and contracted at the same time). The tread adjustment of the rear wheels 5 and 5 is performed by the extension and contraction in the left and right directions. Also,
The front wheel support frame 12 is provided so as to be able to expand and contract in the left and right directions, so that the tread of the left and right front wheels 4 and 4 can be adjusted.

At the rear of the left and right frames 14, there is provided a main frame 15 extending to the right. A steering handle 9 is provided at the rear end of the main frame 15, and the steering handle 9 is supported by the main transmission case 3 via the main frame 15.

A hydraulic lift cylinder 16 is provided at the center of the rear of the main drive case 3 in the left-right direction. The hydraulic lift cylinder 16 is fixedly provided to a hydraulic switching valve portion 17 fixed to the main transmission case 3 and switches the hydraulic pressure from a hydraulic pump 18 fixed to the main transmission case 3. 17 is operated by operating a lifting / lowering operation valve provided in 17. A horizontal rod 19 extending left and right is provided at a cylinder rod end of the hydraulic lifting cylinder 16, and rear wheel lifting rods 20 and 21 are pivotally attached to left and right ends of the horizontal rod 19, respectively.
The other end of each traveling extension case 1
The horizontal rod 19 and the traveling extension case 1 are pivotally attached to upper arms 10a, 10a fixed to
0 and 10 are connected. Therefore, the traveling chain case 11, 11 rotates around the left and right output shafts of the main transmission case 3 via the horizontal rod 19 and the rear wheel lifting rods 20, 21 due to the expansion and contraction of the hydraulic lifting cylinder 16. The rear wheels 5, 5 are moved up and down by the rotation of the traveling chain cases 11, 11, and the body is raised and lowered.

A horizontal hydraulic cylinder 22 which is operated by hydraulic pressure from a hydraulic pump 18 is provided in a middle portion of the left rear wheel elevating rod 20 so as to extend and retract. The left rear wheel 5 is moved up and down with respect to the vertical position of the right rear wheel 5 by the expansion and contraction of
The aircraft can be maintained horizontally horizontally regardless of the unevenness of the valleys. A right and left tilt sensor 23 of a pendulum type is provided on the right side of the main transmission case 3. The horizontal tilt sensor 23 is detected by the left and right tilt sensor 23 via a horizontal operation valve provided in the hydraulic pressure switching valve unit 17. Hydraulic cylinder 2
2 to maintain the aircraft body horizontally horizontally.

In the seedling planting apparatus 6, the power from the main drive case 3 is provided on the rear side of the main drive case 3 so as to plant one seedling in the field. The operation is transmitted and transmitted via a first planting transmission case 25A and a second planting transmission case 25B driven in conjunction with the planting transmission case 24 and the planting transmission case 24.

The seedling planting apparatus 6 comprises a beak-shaped drilling body 26 whose lower part opens and closes back and forth, and a drilling body operating mechanism 27 that operates to raise and lower the drilling body 26. Hole 26
Is composed of a front member 26a and a rear member 26b,
A front member 26a is integrally attached to a front member mounting arm 29a rotatably supported by a front member rotation shaft 28a located behind the hole body 26, and a rear side located in front of the hole body 26. A rear member 26b is integrally mounted on a rear member mounting arm 29b rotatably supported by a member rotation shaft 28b. Therefore, when the two members 26a, 26b rotate around the rotation shafts 28a, 28b as a fulcrum, the lower part of the drilling body 26 opens and closes back and forth. A front member 26a and a rear member 26b are formed by an interlocking pin 30 which is loosely fitted in a long hole formed in the front member mounting arm 29a and the rear member mounting arm 29b.
Rotate in conjunction with each other. Front member mounting arm 29a
Leg 31a and the leg 31b of the rear member mounting arm 29b.
A spring 32 that urges the front member 26a and the rear member 26b toward the closing side is stretched between them.

Next, the hole operating mechanism 27 will be described. A rear link support arm 33a is rotatably attached to a support projecting from the second planting transmission case 25B, and the support arm is provided. The front member rotating shaft 28a is connected to the rear end of the rear link 34a after the base is pivotally mounted on the base. Rear link 3
A rear link drive arm 35a provided at the rear end of the second planting transmission case 25B is connected to the intermediate portion of 4a.
A front link support arm 33b is rotatably attached to the planting mission case 24, and a rear member rotation shaft is attached to the rear end of the front link 34b whose base is pivotally attached to the support arm. 28b are connected. A front link drive arm 35b provided at the rear end of the first planting transmission case 25A is connected to an intermediate portion of the front link 34b. Double drive arm 3
When the drive links 5a and 35b rotate, the rear link 34a and the front link 34b swing up and down while changing the position of the base part back and forth, and the drilling body 26 draws an elliptical locus K in the up and down direction and moves up and down with a constant posture. Move.

An opening / closing arm 36 is provided at the base of the rear link 34a.
The front end of the opening / closing arm 36 and the front member mounting arm 29a are connected by an opening / closing rod 37. An opening / closing cam 38a for a normal seedling and an opening / closing cam 38b for a seedling with a high plant height are provided at an intermediate portion of the rear link 34a so as to rotate integrally with the rear link driving arm 35a.
And a cam follower 39 made of a bearing, which acts on either of them, is provided on the opening / closing arm 36.

The drilling body 26 is provided with a pressing tool 40 for pressing the top soil surface around the drilling body when the lower part of the drilling body enters the soil and opens. As shown in FIG. 5, the pressing tool 40 may be formed integrally with the drilling body. However, the pressing tool is movable independently of the drilling body, and the lower part of the drilling body is formed. May be configured to perform a pressing operation in conjunction with the opening / closing operation of.

In the embodiment shown in FIG. 6, when the lower part of the drilling body is opened from the closed state (a) to the state (b), the pressing tool 40 is displaced from the state (a) to a horizontal state. The ridges are configured to be pressed in a plane parallel to the topsoil surface. By this pressing action, the shoulder opening of the hole is securely pressed and the landslide into the hole can be prevented.

The pressing tool 40 may have a means for pressing the hole body 26 outward. The pressing tool 40 shown in FIG. 7 is configured such that the pressing tool itself is made of an elastic body. When the pressing tool is made of an elastic body in this way, the pressing can be reliably performed even if the topsoil surface around the planting hole has irregularities. Further, even in a multi-field, the multi-film is not damaged.

The drilling body 26 shown in FIG. 8 is divided into front and rear parts so that the lower part comprises a front member 26a and a rear member 26b, and is configured to be openable and closable.
Inclination angle theta ₁ of the front and rear of the outer surface on one side of the lower of is configured asymmetrically to be larger than the inclination angle theta ₂ of the front and rear of the outer surface on the other side. In other words, in this embodiment, for example, the outer surface of the front member 26a on the traveling direction side is configured to have a gentle inclination, and the outer surface of the rear member 26b on the opposite traveling direction side is configured to be steeply inclined.

At the time of planting work, the wall in the traveling direction of the planting hole formed by the drilling body tends to be drawn toward the same traveling direction, so that the amount of soil displaced increases and the landslide occurs. Had occurred. Therefore, such a problem can be solved by making the inclination of the front member 26a on the traveling direction side gentle as described above.

FIG. 9 shows another embodiment of the drilling body, which has the following configuration. In other words, hole 2
6 is substantially elliptical in plan view as shown in FIG. The left and right side wall surfaces l and r are nearly vertical, and the front and rear side wall surfaces f and b are inclined in the front and rear direction beak shape. Therefore, by making the drilling body approximately elliptical in plan view,
It is difficult for quadrangular seedlings of floor soil to fall left and right in the hole. In addition, since the left and right side walls are nearly vertical, the seedlings can be held in an upright posture, and the front and rear side walls can be inclined in the front-rear direction to reduce the rush pressure into the soil.

When the hole 26 is located at the bottom dead center, the opening / closing cam 38a (or 38b) engages with the cam follower 39, whereby the opening / closing rod 37 is pulled. And the rear member 26b rotate back and forth in conjunction with each other, and the lower part of the drilling body 26 is opened.
When the drilling body 26 moves upward, the lower part is kept open. The cam follower 3 is attached to the opening / closing cam 38a.
When the hole 9 acts, the opening / closing cam 38 and the cam follower 39 are disengaged from each other when the hole 26 reaches the top dead center, and the lower portion of the hole 26 is closed by the tension of the spring 32. When the cam follower 39 is acting on the opening / closing cam 38b, the lower portion of the drilling body 26 is closed at a position where the drilling body 26 is slightly past the top dead center. When the drilling body 26 is at a position slightly past the top dead center, the seedling supply unit 7 drops and supplies the seedlings into the drilling body. At this time, the lower part of the hole body 26 is closed. The hole body 28 holding the seedling descends and rushes into the soil of the ridge. Then, at the bottom dead center, the lower part of the hole making body 26 opens to form a seedling transplanting hole, and the seedlings held in the hole are released and planted. When the lower part of the drilling body penetrates into the soil and opens, the pressing tool 40 for pressing the top soil surface around the drilling body is provided, so that the soil collapses into the seedling planting hole. There is no.

The seedling supply unit 7 is provided above the seedling planting device 6 and includes a seedling supply rotating base 41 for sequentially supplying one plant seedling to the seedling planting device 6. The seedling supply turntable 41 includes a crank rod 42 that reciprocates back and forth by transmission from the planting mission case 24,
Vertical rotation shaft 44 via one-way clutch mechanism 43
It is designed to rotate around. Further, the seedling supply rotating table 41 is configured such that a plurality of seedling supply cups 45 are provided at predetermined intervals along a circumference around the rotation shaft 44. The seedling supply cup 45 is the cup 45
Are provided to be openable and closable, and below the seedling supply cup 45 only when the seedling supply cup 45 reaches a predetermined position by the rotation of the seedling supply rotating table 41. A seedling supply cup opening / closing guide 46 provided so as to open is fixedly provided on the machine body side. Accordingly, the rotation of the seedling supply rotating table 41 causes the seedling supply cup 45 to rotate.
Comes to a predetermined position A, the bottom surface 45a of the seedling supply cup 45 is opened to drop and supply the pot seedling in the seedling supply cup 45 to the lower drilling body 26. When the seedling supply cups 45 rotate out of the predetermined position A, the bottom surfaces 45a of the seedling supply cups 45 are closed.

At the front side of the seedling supply rotating table 41, a seedling placing frame 47 for placing the seedlings raised on the cell tray together with the cell tray.
Is provided. A pair of left and right covering soil compression wheels 8 are provided at the rear position of the seedling planting position, roll on the ridge surface as the aircraft advances, and collapse the soil around the seedling planting holes after seedlings are planted. The hole is backfilled and the trace is lightly crushed.

[Brief description of the drawings]

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

FIG. 2 is a plan view of the seedling transplanter with a part omitted.

FIG. 3 is a side view of the seedling planting apparatus.

FIG. 4 is a plan view of the seedling planting apparatus.

FIG. 5 is a side view of a drilling body.

FIG. 6 is a side view of a drilling body.

FIG. 7 is a side view of a drilling body.

FIG. 8 is a side view of a drilling body.

FIG. 9A is a plan view of the drilling body, FIG.
(C) Partial front view

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Seedling transplanter, 2 Engine 3 Main drive case 4 Front wheel 5 Rear wheel 6 Seedling planting device 7 Seedling supply part, 8 Covering pressure reduction wheel 9 Steering handle 10 Traveling extension case 10a Upper arm 11 Traveling chain S 12 Front wheel support frame 13 Rolling shaft 14 Left and right frame 15 Main frame 16 Hydraulic lifting / lowering cylinder 17 Hydraulic switching valve 18 Hydraulic pump 19 Horizontal rod 20 Rear wheel lifting / lowering rod 21 Rear wheel lifting / lowering rod 22 Horizontal Hydraulic cylinder 23 Left-right inclination sensor 24 Planting mission case 25A First planting transmission case 26 Drilling body 26a Front side member 26b Backside member 27 Drilling body operating mechanism 40 Pressing tool 41 Seedling supply turntable 45 Seedling Supply cup 47 Seedling mounting frame

Claims (4)

[Claims] 1. A drilling body that rises and descends periodically and enters the soil at or near the bottom dead center of the elevation, and when it enters the soil, its lower part opens to open a hole for planting seedlings. A seedling transplanter, comprising: a pressing tool for pressing a top soil surface around the drilling body when a lower part of the drilling body enters the soil and opens. 2. The seedling transplanter according to claim 1, wherein the pressing tool presses outward in a plane parallel to the field scene or against the drilling body. 3. The seedling transplanter according to claim 1, wherein the pressing tool is formed of an elastic body. 4. A drilling body that rises and descends periodically, enters the soil at or near the bottom dead center of the elevation, and when it enters the soil, its lower part opens to open a hole for planting seedlings. The drilling body has a configuration in which the lower part is divided into front and rear parts to open, and the front and rear inclination angles of the outer surface on one side of the lower part of the drilling body are larger than the front and rear inclination angles of the outer surface on the other side. A seedling transplanter characterized by having an asymmetric configuration.