JPH11225514A - Direct sowing type seeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a direct sowing type seeder capable of further optimizing spot sowing in soil so as to surely beat seeds from a feed roll and enable control of sowing amount by a simple operation. SOLUTION: In this seeder arranging a spot sowing unit 5 equipped with a rotation beater 7 below a feed roll 3 for cutting out seeds S from a hopper 2 and beating and spot-sowing the seeds S fed by a definite amount from the feed roll 3 into a field by a rotation beater 7, action of a pusher 9 beating seeds S from insert port 3c of seeds S provided in the feed roll 3 is driven by rolling slide contact with roll, etc., to make rotation resistance small and fasten rotation of the feed roll 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a direct sowing type sowing machine for sowing a plurality of rice seeds into a lump so as to be poured into the soil of a field.

[0002]

2. Description of the Related Art In the rice planting operation of rice cultivation, a seedling allowance is prepared in advance by using a tray of a predetermined size, and for example, transplanting cultivation by a seedling allowance in which seedlings are planted one by one from a nursery allowance by an automatic rice planting machine. Has been widely used since. This transplant cultivation is a traditional one in Japan, and is very preferable in that a proper number of seedlings are transplanted to the field at regular intervals, so that rooting of the seedlings is good and uniform growth of rice ears is promoted. It is assumed.

On the other hand, in such transplant cultivation, one of the major problems in terms of work efficiency is that the time and labor required for the production of seedlings and transplantation in the field are large. . Therefore, in recent years, direct sowing cultivation in which seeds are directly sown in a field without making a seedling allowance has been actively performed. And, in this direct sowing cultivation, the soil mid-point sowing method in which seeds are poured into the soil at the same time as scraping, so that floating seedlings and falling seedlings hardly occur and can be worked at the same time as scraping work is most preferable. In recent years, its spread has been rapid.

[0004] In the sowing method of the dot sowing method, a plurality of seed masses are discharged toward a field. Therefore, the seeding machine is provided with a feeding roll for cutting out seeds at a lower end of a hopper storing the seeds, and a plurality of rolls are provided below the feeding rolls. It is sufficient to provide a gear-shaped rotating disk in which a concave portion capable of storing the seed is formed on the peripheral surface. With such a configuration, the seeds cut out from the hopper by the feeding roll can be fed into the concave portion of the rotating disk, and a plurality of seeds can be intermittently driven into the field by the rotation of the rotating disk.

[0005]

However, in the conventional seeding machine, although the feeding roll can adjust the cut-out amount, when the seed filling groove formed on the peripheral surface thereof faces downward, the seed is rotated by a rotating disk. It is the basic structure that it flows down to the side. For this reason, a plurality of seeds from the feeding roll reach the rotating disk as a continuous flow rather than a group of masses, and it is impossible to simultaneously reach one concave portion of the rotating disk.

[0006] In the case of supplying seeds from such a feeding roll, since the rotating disk is also rotating at the same time as the feeding roll, all of the cut seeds cannot be filled in one recess, and the circumferential direction of the rotating disk cannot be filled. The seeds are dispersed over a plurality of concave portions that are continuous with each other. For this reason, variations occur in the amount of seeds driven into the field by the rotating disk, and the number of seeds may be large or small depending on the position where the seeds can be seeded even when spotting is possible. Such variation in the number of seeds has a great effect on the rooting of the plant from the growth of the seedlings, and the growth of the plant cannot be equalized.

On the other hand, the seeds from the feeding roll can be reliably sent to the rotating disk as one lump.
The inventor of the present invention has already proposed and filed a Japanese Patent Application No. 8-181040, which has provided a seeding machine provided with a pusher that mechanically moves in and out corresponding to the filling groove of the feeding roll. In a feeding roll equipped with such a pusher, if the pusher is driven to extrude the seeds in synchronization with the timing of releasing the seeds to the rotating disk, a plurality of seeds can be supplied to the rotating disk as one lump, As a fixed amount of injection, spot seeding in a field can be favorably performed.

However, in the prior application, the pusher is configured to cause the extending / retracting operation of the feeding roll in the radial direction by the cooperative operation of the cam and the spring. They return to accept the seeds. For this reason, for example, when the pusher has bitten the seed, if the restoring force of the spring cannot move the pusher against the biting force of the seed, the pusher in / out operation stops. Therefore, for example, if a plurality of pushers are arranged at a constant pitch on the peripheral surface of the feeding roll and one of them is in such a state, the pitch of the spot sowing becomes nonuniform, which greatly affects the sowing operation.

The amount of seeds cut out from the feeding roll is determined by the size of the filling groove. However, since the position of the pusher corresponding to the bottom of the filling groove is constant, the capacity of the filling groove cannot be changed. For this reason, it is poorly compatible when the seeding amount frequently changes depending on the size of the seeds, field conditions, and the like.

[0010] As described above, even if the seeds can be supplied to the rotating disk by being pushed out by a pusher so as to be flipped off from the feeding roll, there are problems in terms of workability at the site and changes in the seeding amount. Remaining.

The problem to be solved in the present invention is that a direct sowing method that can more reliably optimize the seeding in the soil by enabling the seeding from the feeding roll to be more reliably performed and the seeding amount to be adjusted by a simple operation. To provide a seeding machine.

[0012]

According to the present invention, there is provided a direct sowing type sowing machine according to the present invention, which comprises a rotary drive type feeding roll for cutting seeds from a hopper, and a plurality of seeds arranged below the feeding roll for receiving a plurality of seeds. The feeding roll is a hollow cylindrical body, which cuts out a charging port for receiving seeds from a hopper in the peripheral wall, and this charging port rotates. Built-in pusher that ejects seeds in conjunction with the rotation of the feeding roll when facing the connection path to the beater, and the pusher can rotate so that the head at one end can move in and out of the loading port And the head is elastically urged inward from the loading port and is connected along the inner peripheral wall of the feeding roll, and the head is linked to the pusher without rotation of the feeding roll. A drive member for moving through the spout outward, characterized by comprising a sliding mechanism rolling coordination with these pushers and driver.

In such a configuration, the pusher forms a surface facing the center side of the feeding roll as a liner cam which is in sliding contact with the driving body, and this liner cam is a portion corresponding to the head and has a distance from the center of the feeding roll. Can be divided into two sections of a longer drive surface and a shorter return surface in the direction of rotation of the feeding roll, so that the driving body can be a rotatable drive roll that rolls and contacts only the drive surface.
In this case, a return roll that rolls only into the return surface of the liner cam of the pusher and shifts the pusher head to the inside of the feed roll in the charging port, and is rotatably provided without any rotation with the feed roll. Is also good.

[0014] Further, it is possible to provide a filling amount adjusting mechanism for adjusting a filling amount of the seed into the charging opening by adjusting an amount of the pusher entering the charging opening of the head. In this case, the filling amount adjusting mechanism is located on the opposite side to the head with respect to the rotating fulcrum of the pusher, is connected to the rotating operation, and is capable of changing the distance between the inner peripheral surface of the feeding roll and the bolt. can do.

The filling adjusting mechanism further includes a stopper liner which is rotatably coaxially mounted inside the feeding roll and which is capable of applying a restraining force in the radial direction to the pusher on a peripheral surface thereof. An adjustment cam that can change the position of the head according to the rotational attitude of the liner can also be used. In this case, the loading ports are provided at a plurality of locations at a constant circumferential pitch, and the same number of pushers are arranged so that the heads correspond to each of these loading ports, and the peripheral surface corresponding to each of these pushers is arranged. A stopper liner having the same profile may be formed on the adjustment cam at a plurality of locations.

Further, the head of the pusher may be provided with a bulge projecting outward in the loading port at an end opposite to the rotation direction of the feeding roll.

An opening is provided on the peripheral surface of the housing for accommodating the rotary beater and below the end of the flow path on the feed roll side, and a movable chute for communicating the end of the flow path with the opening is provided on the housing. The movable chute may be connected to the movable chute so that the distance between the beater and the inner surface of the movable chute can be adjusted.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a cutaway side view of an essential part when a direct sowing type sowing machine of the present invention is connected to a trailing harrow tail.

In the figure, a bracket 52 protruding from the rear end of a substitute harrow 51 for traveling in the right direction
A main frame 1 is connected to the main frame 1, and a plurality of seeding hoppers 2 are fixed to the main frame 1 at predetermined intervals in a direction orthogonal to the drawing.

The hopper 2 is provided with a feed roll 3 at its lower end so as to be rotatable in the direction of the arrow in the figure, and has a long drive shaft 4 which is disposed so as to penetrate the center of the feed roll 3 of each hopper 2. As a result, these feeding rolls 3 rotate synchronously. The rotation of the drive shaft 4 is performed via a chain 1b between the drive shaft 4 and an output shaft of a drive motor 1a provided on the main frame 1.

The seeds S are disposed directly below the delivery roll 3 by a direct sowing method.
Is provided with a spot seeding unit 5 for spot seeding in the soil. The spot seeding unit 5 includes a housing 6 and a rotary beater 7 rotatably provided in the housing 6. The rotation beater 7 of each spot seeding unit 5 is connected to the output shaft of the drive motor 1a through the center of the drive shaft 8 through the center thereof by a chain 1c. It is driven to rotate in the direction of the arrow in the middle.

FIG. 2 shows the details of the spot seeding unit 5, and (a) and (b) of FIG. 2 are a side vertical sectional view and a front vertical sectional view as viewed from the running direction, respectively.

The housing 6 has a space for accommodating the rotary beater 7 which is slightly wider and forms a circular space in a vertical section as shown in FIG. A connection chute 6a for connecting to the lower end of the hopper 2 protrudes upward from a portion slightly above the center of the housing 6. On the peripheral surface of the housing 6 below the connection chute 6a, a discharge chute having a lower end inclined in a direction tangential to the outer peripheral surface of the housing 6 and opposite to the traveling direction of the halo is provided. 6b. The connection chute 6a and the discharge chute 6b are formed to be smaller than the width of the circular portion of the housing 6, as shown in (b) of the figure, and the discharge chute 6b directs the seed S into the field. It has such a length that it can be guided linearly and give sufficient directivity to its emission direction.

The rotary beater 7 has at least its peripheral surface formed as a relatively soft member such as sponge rubber, and is integrally formed with a boss 7a supported by bearings 6c incorporated at both ends in the axial direction of the housing 6. I have.
Then, the drive shaft 1 is penetrated and fixed to the boss 7a so that the drive of the drive motor 1a can be transmitted to the rotary beater 7 by the chain 1c and the drive shaft 8.

The rotating beater 7 is, for example, 10-20
It has a width of about mm and its outer peripheral portion is formed on a saw blade. This saw blade portion is a continuous surface of a blade portion 7b whose tip is slightly inclined in the rotation direction and a valley portion 7c sandwiched between them, and a clearance between the blade portion 7b and the inner peripheral surface of the housing 6 is provided. By setting the connection chute 6a
A plurality of seeds S flowing into the valley 7c can be transported in a state where they are dropped into the valley 7c.

FIG. 3 is a longitudinal sectional view showing a portion from the lower end of the hopper 2 to the spot seeding unit 5.

At the lower end of the hopper 2, there is provided a chamber 2a for accommodating the feeding roll 3 rotatably and for guiding the seeds S in the hopper 2 toward the connection chute 6a of the spot seeding unit 5. The line connecting the center of rotation of the feeding roll 3 housed in the chamber 2a and the rotation center of the rotary beater 7 located below the feeding roll 3 is substantially parallel to the inclination of the discharge chute 6b. The roll 3 is not located directly above the rotary beater 7 but is biased in the traveling direction of the halo 51.

At the upper end of the chamber 2a, a partition wall 2b is provided with its tip end slightly inclined downward.
Brushes 2c and 2d for preventing seeds S from leaking to the connection chute 6a side are provided on the lower surface of b and the inner peripheral surface on the lower left side of the chamber 2a, respectively. The brush 2c provided on the lower surface of the partition wall 2b is slightly to the right of the tip of the partition wall 2b slightly inclined downward as shown in FIG.
And is located slightly to the right of the upper end of the peripheral surface of the feeding roll 3. By providing a guard 2b-1 that is slightly bent downward at the tip of the partition wall 2b, the flow of the seed S into the brush 2c is suppressed.

By blocking the flow of the seeds S to the brush 2c side as described above, the load on the brush 2c by the seeds S following the peripheral surface when the feeding roll 3 rotates in the direction of the arrow is reduced. Therefore, the feeding roll 3
Even if there is a bending deformation of the brush 2c at the time of rotation, since the flow of the seed S itself is suppressed, the seed S
Of the connection chute 6a.

The feeding roll 3 is a hollow cylindrical body having only one end in the axial direction closed by a flange 3a and the other end opened, and the drive shaft 4 is fitted to a boss 3b provided on the flange 3a. It is designed to be able to rotate together. Then, at the peripheral wall of the feeding roll 3, openings 3c for seeds S are opened in three places at an angle pitch of 120 °, and inside the seeds S contained in these openings 3c are punched out. The three pushers 9 are incorporated.

FIG. 4 is an enlarged cross-sectional view showing the feeding roll 3 and a main part around it, FIG. 5 is an enlarged cross-sectional view of a main part showing a positional relationship of the pusher 9 with respect to the charging port 3c, and FIG. It is the details of.

The pusher 9 is rotatably connected around a support shaft 3d protruding from the flange 3a of the feeding roll 3, and as shown in FIGS. It has a flat head 9a slightly smaller than the opening shape of the charging port 3c, and a liner cam 9b integrally connected to the flat head 9a.

The liner cam 9b is made of a thin plate material as shown in FIG. 3A and has a substantially arcuate shape as a whole, and has a surface facing the center when assembled into the feeding roll 3. The drive surface 9c and the return surface 9d are each provided as a cam. The drive surface 9c and the return surface 9d of the liner cam 9b are bent at a portion between the surfaces 9c and 9d such that the positions are separated from each other.

The side wall of the drive surface 9c is shown in FIG.
As shown in (1), a bolt 9e for a stopper is provided. The bolt 9e is screwed into a nut 9e-2 welded to a bracket 9e-1 provided on the side wall of the driving surface 9c, and the tip end of the bolt 9e can be abutted against the inner peripheral surface of the feeding roll 3 as shown in FIG. It is. And this bolt 9
By changing the position of the front end surface by the rotation operation of e, the posture of the feeding roll 3 is changed, and the filling amount of the seeds S into the charging inlet 3c can be adjusted.

On the other hand, a driving roll 10a and a return roll 10b are rotatably provided in the chamber 2a of the hopper 2 in such a manner that the feeding roll 3 enters the inside from the open end face. These drive and return rolls 10a, 10b are fixed using the inner wall of the chamber 2a, and are supported by a support shaft 10a-
1, 10b-1 and shown in FIG.
As shown in FIG. 3, the drive surface 9c and the return surface 9d are arranged respectively.

The pusher 9 is assembled such that the head 9a faces the loading opening 3c when the liner cam 9b is supported by the support shaft 3d as shown in FIG. At a substantially intermediate position between the support shaft 3d and the head 9a, a compression coil spring 11 having a base end held on the inner peripheral wall of the feeding roll 3 is incorporated.
Is urged counterclockwise around the support shaft 3d. Therefore,
The pusher 9 is held in such a position that the distal end surface of a bolt 9 e arranged as a stopper abuts against the inner peripheral surface of the feeding roll 3.

When the bolt 9e is turned downward in FIG. 6C, the protruding length of the bolt 9e increases, so that the pusher 9 moves clockwise around the support shaft 3d in FIG. The head 9a rotates, and the head 9a enters deeply into the loading port 3c. Conversely, if the bolt 9e is turned so as to move upward, its protruding length becomes shorter, so that the pusher 9 rotates counterclockwise around the support 3d in FIG. 4, and enters the head 9a into the loading opening 3c. Becomes shallower. By rotating the bolt 9e in this way, it is possible to increase or decrease the entry of the head 9a into the charging port 3c. If the head 9a is large, the filling amount of the seed S into the charging port 3c is small. The filling amount of S can be increased. Therefore, each of the three pushers 9 incorporated in the feeding roll 3 can independently adjust the amount of the seed S to be charged into the charging port 3c by rotating the bolt 9e.

Further, as shown in FIG. 5, the head 9a of the pusher 9 is provided with a raised portion 9a-1 which bulges outward from one end in the direction opposite to the rotation direction of the feeding roll 3. When the pusher 9 rotates integrally with the feeding roll 3, the raised portion 9a is
This is for allowing the seed S to be caught in a manner to be lifted before c.

In the above configuration, when the drive motor 1a is operated simultaneously with the traveling of the harrow 51, the drive shafts 4 and 8 are both rotated clockwise in FIG. 3, and the feeding roll 3 and the rotary beater 7 are also synchronized. Rotate in the same direction. When the outer shape of the rotary beater 7 is about 200 mm, the number of rotations is about 700 to 1600 rpm,
By adjusting the number of rotations in proportion to the traveling speed of the harrow 51, it is possible to perform spot seeding at a constant pitch on the field.

As shown in FIG. 5, the three pushers 9 incorporated in the feeding roll 3 have a head 9a within the angle range between the brushes 2c and 2d and facing the inside of the hopper 2.
Is set to the posture retracted to the lower end side of the charging entrance 3c. This is because the return roll 10b is pushed by the pusher 9 as described later.
This is because the return surface 9d is pressed to maintain the stationary posture by the reaction force of the coil spring 11. Therefore, while the loading port 3c reaches the upper brush 2c from the brush 2d, the loading port 3c is opened so that the peripheral surface of the feeding roll 3 is depressed as shown in FIG.
The seed S in the inside enters the charging port 3c and is filled.

In filling the seeds S into the charging port 3c, as shown in FIG. 5, a raised portion 9a-1 is provided on the surface of one end of the head 9a, so that the head 9a is moved from the brush 2d to the brush 2c. When turning at an upward slope to the side,
The ridge 9a-1 lifts up the seed S. Therefore, while the loading port 3c is moving, the protruding portions 9a-1 fluidize the seeds accumulated near the loading port 3c, and encourage the seeds S to extend into the loading port 3c. Thus, the amount of seeds S charged into the loading inlet 3c can be made uniform.

In the pusher 9 in which the head 9a is maintained in the state shown in FIG. 5 by the urging force of the coil spring 11, the liner cam 9b approaches the driving roll 10a as the feeding roll 3 rotates. As shown in FIG. 6A, the drive roll 10a is free from the return surface 9d of the liner cam 9b, and as shown in FIG. 4, a portion of the chamber 2a where the charging port 3c is connected to the connection chute 6a. It comes into contact with the driving surface 9c when it comes to the inside position. That is, when the feeding roll 3 rotates and the charging port 3c faces the chamber 2a near the connection chute 6a, the pusher 9 is rotated clockwise around the support shaft 3d by the driving roll 10a. Then, as described above, the feeding roll 3 rotates at a rotation speed of about 700 to 1600 rpm, and the moving speed of the pusher 9 with respect to the stationary drive roll 10a is also high. 5 is rotated. Therefore, the moving speed of the head 9a at the loading opening 3c is also increased, and the seeds S filled in the loading opening 3c can be hit and shot at once.

By the ejection of the seeds S by the pushers 9, the seeds S can be released as a group to the connecting chute 6a. Therefore, a plurality of lumps of seeds S are sequentially fed into the valley 7c of the rotary beater 7 as they are, and the same amount of seeds filled in the charging inlet 3c is supplied without being dispersed to the plurality of valleys 7c. You.

As described above, a plurality of seeds S can be sent as a group to one valley 7c, and
, The seeds S are ejected as a group of lump from the discharge chute 6b toward the field. Since the discharge chute 6b extends obliquely downward in a tangential direction with respect to the outer periphery of the rotary beater 7, the centrifugal force generated by the rotation of the rotary beater 7 urges the release of the seeds S, whereby the seeds S Point seeding can be performed as a mass of a plurality of seeds S.

Since the feeding roll 3 continues to rotate even after the ejection of the seed S by the pusher 9 is completed, when the driving surface 9c comes out of the driving roll 10a in FIG. 9 returns to a posture in which the head 9a is retracted to the bottom side of the charging port 3c by the restoration of the coil spring 11. Thus, the seeds S can be filled in the loading port 3c while the loading port 3c passes between the brush 2d and the brush 2c arranged on the upper side, and the filling and the ejection by the pusher 9 are repeatedly performed.

Here, when the pusher 9 returns to the initial position, the seeds may bite between the pusher 9 and the loading port 3c, and the biting cannot be released only by the restoring force of the coil spring 11. is expected. In contrast,
The feed roll 3 rotates and the liner cam 9b of the pusher 9
When the return surface 9d comes into contact with the return roll 10b, the return roll 10b rotates the return surface 9d counterclockwise in FIG. 4 around the support shaft 3d. Therefore,
The head 9a rotates in the direction from the loading port 3c toward the center side of the feeding roll 3, and can return to the initial posture by itself even if there is biting of seeds between the loading port 3c.

In the above example, the filling amount of the seed S can be adjusted by changing the amount of the head 9a entering the charging port 3c by rotating the bolt 9e provided as a stopper. However, in this adjustment of the filling amount,
Since it is necessary to equalize the amount of the seeds S to be spot-sown, it is necessary to adjust each of the three pushers 9 with the bolts 9e, and the operation is troublesome, and it is difficult to uniformly adjust the amount of each. .

On the other hand, the examples shown in FIGS. 7 to 9 include a mechanism that facilitates the adjustment of the filling amount of the charging port 3c, and will be described below. Note that the same members as those in the previous example are designated by the same reference numerals, and detailed description thereof will be omitted.

A pusher 9 to be incorporated in the feeding roll 3
Has a liner cam 9b having a driving surface 9c and a return surface 9d formed on the surface facing the center of the feeding roll 3 in substantially the same shape as the previous example. The pusher 9 is different from the previous example in that the end opposite to the head 9a is rotatably connected by a support shaft 3d, and is different from the previous example in that the pusher 9 is urged by the coil spring 11, the drive roll 10a and the return roll 10b. Are the same.

An adjusting cam 12 for adjusting the filling amount is provided inside the feeding roll 3 so as to be rotatable coaxially.
The adjustment cam 12 has a triangular outer shape which is extrapolated around a holding rib 3e provided in the feeding roll 3 and approximates the peripheral surface to a substantially fan shape. And a rack 12b is provided on one side.

As shown in FIG. 7, the stopper liner 12a has a profile in which the inclination of the apex portion of the adjustment cam 12 is gentle and the curvature increases toward the lower side. Up to the square root curve. A slide rib 9f that slides on the peripheral surface of the stopper liner 12a is provided on the side surface of the cam liner 9b of the pusher 9, so that the rotation posture of the pusher 9 around the support shaft 3d can be restricted according to the stopper liner 12a. .

Further, an adjusting tool 13 which can be manually operated from the open end side is provided inside the feeding roll 3. The adjusting tool 13 is rotatably incorporated through a holding seat 3f formed on the feeding roll 3, and includes an operation knob 13a and a pinion 13b that meshes with the rack 12b. When the operation knob 13a is turned, the adjustment cam 12 can be rotated clockwise or counterclockwise in FIG. 7 in accordance with the rotation direction, thereby changing the position of the stopper liner 12a with respect to the slide rib 9f of the pusher 9. Can be.

FIG. 9 shows the charging port 3 by the rotation of the adjusting cam 12.
8A and 8B are schematic diagrams showing a change in the amount of the head 9a of the pusher 9 with respect to the position c. FIG. 7A corresponds to the position of the head 9a shown in FIG.

When the operation knob 13a of the adjusting tool 13 is rotated so that the pinion 13b rotates clockwise in FIG. 7, the adjusting cam 12 rotates counterclockwise, and the stopper liner 12a is moved to the position shown in FIG. Move in the direction of (b).
Accordingly, the stopper liner 12 is provided on the slide rib 9f.
7A comes into contact, the coil spring 11 is compressed, and the pusher 9 rotates clockwise around the support shaft 3d in FIG. 7, and as shown in FIG. The head 9a goes deep into the inside. For this reason, the filling amount of seed into the charging inlet 3c is smaller than the setting of (a) in FIG.

When the operation knob 13a is rotated in the opposite direction, the adjusting cam 12 rotates clockwise in FIG. 7, thereby causing the stopper liner 12a to rotate as shown in FIG.
The part farthest from the apex angle is the slide rib 9 as shown in FIG.
Contact f. Therefore, penetration of the head 9a into the loading port 3c is reduced, and the seed filling amount of the loading port 3c is increased.

The change setting of the posture of the pusher 9 by the adjusting cam 12 as described above can be performed simultaneously for the three pushers 9. Can be adjusted in synchronization with each other, and the adjustment work is much easier than in the previous example. Further, since the rotation angle of the adjusting cam 12 is equal for all the pushers 9, the relative position of the head 9a with respect to the loading port 3c can be made common. Therefore, the filling amounts of all the three charging openings 3c can be made the same, and the same amount of seed can be seeded.

FIG. 10 shows that the size of the supply path between the rotating beater 7 and the peripheral surface of the rotating beater 7 can be adjusted so that the seed S from the feeding roll 3 can be quickly sent out from the rotating beater 7 to the discharge chute 6b. It is a longitudinal section of an important section showing composition.

In the figure, a movable chute 14 is provided in the housing 6 so as to be rotatable in the direction of arrow B, instead of the integral connection chute 6a shown in the previous example. The movable chute 14 has a shape in which the upper end thereof faces a feed port 2 a-1 at the lower end of the chamber 2 a of the hopper 2 shown in FIG. 3 and the lower end side is slightly bent so as to follow the peripheral surface of the housing 6. The opening 6d is formed in such a manner as to face the opening 6d formed on the peripheral surface of the opening 6 so as to connect the feeding port 2a-1 to the opening 6d.

The movable chute 14 has a pivot pin 14a.
The lower end is connected to the housing 6 by the
The upper end side is connected to the housing 6 by a guide pin 14b protruding rightward in the drawing and inserted through a long hole 6e-1 provided in a pair of brackets 6e spaced from each other in a direction perpendicular to the drawing. Things.
Therefore, the movable chute 14 can change its posture in the direction of arrow B corresponding to the range in which the guide pin 14b can move in the long hole 6e-1 with the pivot pin 14a as the rotation axis.

A support shaft 15a rotatable in the direction of arrow C in the figure is provided between the pair of brackets 6e, and a movable shaft 14b is provided on the movable chute 14 at a position slightly obliquely above the support shaft 15a. Is provided rotatably in the direction of arrow D in the figure. That is, the support shaft 15a and the connection shaft 15b are connected to the housing 6 side and the movable chute 14 side, respectively, so as to have axes parallel to each other. An operation shaft 15 for adjusting the rotation angle of the movable chute 14 is provided on the support shaft 15a and the connection shaft 15b.
c is attached by screw connection.

The operating shaft 15c is formed with a male screw 15c-1 except for the knob 15d side, and is provided with a retaining pin 15c-2 at the tip.
The housing 6 and the movable chute 14 are connected by screwing into the connection shaft 15a and the connecting shaft 15b. And pick 1
When the dial 5d is manually turned, the support shaft 15a and the connecting shaft 15b are freely rotatable around their respective axes, so that the operation shaft 15c can be moved in the direction of arrow E in the drawing depending on the rotation direction. Therefore, the movable chute 14 is connected to the pivot pin 14a.
Can be rotated in the direction of arrow B with the rotation fulcrum as a fulcrum to adjust its posture.

By changing the attitude of the movable chute 14 in this manner, the position of the inner peripheral surface 14e from the discharge port 14d at the lower end of the internal flow path of the movable chute 14 to the pivot pin 14a connected thereto can be changed. Can be changed for For this reason, it is possible to adjust the distance between the blade portion 7b and the valley portion 7c of the rotary beater 7 to increase or decrease the distance according to the size of the seed S. Therefore,
The seeds S fed from the hopper 2 are not clogged between the rotary beater 7 and the inner peripheral surface of the housing 6, and the seeds S can always be driven with a predetermined driving force.

[0063]

According to the first aspect of the present invention, the pusher rotatably disposed along the inner periphery of the pay-out roll is provided with a rolling contact with the driving body when the head hits and launches the seed from the loading port. Since the posture is changed by the contact mechanism, even when moving the pusher, it is unrelated to the feeding roll,
For example, the frictional resistance between the driving body in a stationary state is reduced, the rotation load of the feeding roll can be reduced, and the light rotation can be maintained. Therefore, since uniform rotation of the feeding roll is maintained, the seeding pitch is not disturbed, and good direct sowing is possible.

According to the second aspect of the present invention, since the rotatable drive roll provided as a drive body abuts against the drive surface of the liner cam provided on the pusher, the resistance due to rolling sliding contact is further reduced.

According to the third aspect of the present invention, the head is returned to a predetermined position of the loading port by abutting the return roll against the return surface of the liner cam, so that the seed is stuck between the head and the loading port and cannot move. Can be forcibly restored. Therefore, even when a plurality of loading ports are arranged, the release of the seeds from all the loading ports is always maintained, so that seeding without a lack of stock in the field can be performed.

According to the fourth aspect of the present invention, the amount of seeds to be spot-seeded can be arbitrarily set by the filling amount adjusting mechanism, so that seeding suitable for the size of seeds and field conditions can be performed.

According to the fifth aspect of the present invention, the seed filling amount can be changed for each pusher only by turning the bolt, so that, for example, if a plurality of sets of inlets and pushers are provided in the circumferential direction, each of the sets can be used. The filling amount can be changed.

According to the sixth aspect of the present invention, the seed filling amount can be similarly changed by rotating the adjusting cam.
Seeding according to the size of the seeds and field conditions becomes possible.

According to the seventh aspect of the present invention, since the adjustment of the seed filling amount for a plurality of pushers and the loading port can be simultaneously performed by rotating the one adjusting cam, the adjusting operation is simplified and each loading port is adjusted. Since the amount of seeds released from the soil is also uniformed, it is possible to perform an operation for uniformizing the size and growth of the strains in the field.

According to the eighth aspect of the present invention, the raised portion of the pusher head is pumped to the loading port so that the seeds are lifted up, so that the seed feeding is quickly filled in the loading port, and the light rotation of the feeding roll is maintained. .

According to the ninth aspect of the present invention, since the movable chute for receiving the seeds from the pay-out roll and the attitude thereof can be adjusted with respect to the housing accommodating the rotary beater, the attitude of the movable chute depends on the size of the seeds. If the is adjusted appropriately, seed clogging or the like at the rotating beater portion does not occur, and stable seeding of seeds on the field can be performed.

[Brief description of the drawings]

FIG. 1 is a schematic side view when a direct sowing type seeder according to the present invention is connected to the rear end of a harrow.

FIGS. 2A and 2B are details of a spot seeding unit, wherein FIG. 2A is a side vertical cross-sectional view, and FIG. 2B is a front vertical cross-sectional view viewed from a traveling direction of a halo.

FIG. 3 is a longitudinal sectional view of a main part from the hopper to the spot seeding unit.

FIG. 4 is a longitudinal sectional view of a main part showing details of a payout roll and a pusher provided therein.

FIG. 5 is an enlarged cross-sectional view of a main part showing a loading port of a pay-out roll and a head portion of a pusher entering the delivery roll.

6A and 6B are details of the pusher, wherein FIG. 6A is a front view showing the positional relationship between the drive and return rolls, FIG. 6B is a left side view of the pusher of FIG. 6A, and FIG. FIG.

FIG. 7 is a cross-sectional view of a main part showing an example in which an adjusting cam capable of changing a filling amount of seeds into a charging inlet is provided on a feeding roll.

8 is a vertical sectional view taken along line AA of FIG. 7;

FIG. 9 is a schematic view showing the operation of a pusher by a stopper liner of an adjustment cam.

FIG. 10 is a longitudinal sectional view of a main part showing a configuration in which a movable chute is provided in a housing of a rotary beater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main frame 1a Drive motor 2 Hopper 2a Chamber 2b Partition wall 2b Guard 2c, 2d Brush 3 Feeding roll 3c Loading inlet 3d Support shaft 3e Holding rib 3f Holding seat 4 Drive shaft 5 point seeding unit 6 Housing 6a Connection chute 6b Release chute 7 rotation Beater 8 Drive shaft 9 Pusher 9a Head 9a-1 Raised portion 9b Liner cam 9c Drive surface 9d Return surface 9e Bolt 9f Slide rib 10a Drive roll 10b Return roll 11 Coil spring 12 Adjustment cam 12a Stopper liner 12b Rack 13 Adjustment knob 13a 13b Pinion 14 Movable chute 14d Discharge port 14e Inner peripheral surface 15a Support shaft 15b Connecting shaft 15c Operation shaft 15c-1 Male screw 15d Knob

 ──────────────────────────────────────────────────続 き Continuing from the front page (71) Applicant 598020088 Satoshi Yoshinaga 496 Izumi, Oji, Chikugo City, Fukuoka Prefecture (71) Applicant 598020099 Kenzo Wakimoto 306-1 Yamanoi, Oji, Chikugo City, Fukuoka Prefecture Green Forest 202 (72) Inventor Yutaka Sagara 1618-8 Hachinohe Mizo, Nabeshima-cho, Saga City, Saga Prefecture (72) Inventor Kunji Shimotsubo 496, Izumi Izumi, Chikugo-shi, Fukuoka Prefecture (72) Inventor Tatsushi Togashi 514-1, Murooka, Oaza, Yame City, Fukuoka Prefecture (72) Invention Satoru Yoshinaga Satoshi Izumi, Oji, Chikugo City, Fukuoka Prefecture (72) Inventor Kenzo Wakimoto 306-1 Yamanoi, Oji, Chikugo City, Fukuoka Prefecture Green Forest 202

Claims (9)

[Claims] 1. A point seeding unit comprising: a rotary drive type feed roll for cutting seeds from a hopper; and a rotary drive type rotary beater disposed below the feed roll and receiving a plurality of seeds and discharging the seeds to a field scene. The feeding roll is a hollow cylindrical body, and a charging port for receiving seeds from the hopper is cut into the peripheral wall, and when the charging port faces a connection path to the rotary beater, the feeding roll is rotated. Built-in pusher that ejects seeds in conjunction with rotation, the pusher is rotatable so that the head at one end can move in and out of the loading port and the head is elastic from the loading port to the inside. Driven by being urged and connected along the inner peripheral wall of the feeding roll, and linked to the pusher so that the head moves outward in the loading port without being related to the rotation of the feeding roll. A direct seeding type sowing machine having a body and a linkage between these pushers and a driving body serving as a rolling sliding contact mechanism. 2. The pusher has a surface facing the center side of the feeding roll formed as a liner cam that is in sliding contact with a driving body, and the liner cam is a portion corresponding to the head and has a longer distance from the center of the feeding roll. The direct sowing type seeding machine according to claim 1, wherein the drive member is a rotatable drive roll that is divided into two sections of a surface and a shortened return surface in the rotation direction of the feeding roll, and the driving body is in rolling contact with only the drive surface. 3. A return roll, which rolls and contacts only the return surface of the liner cam of the pusher and shifts the head of the pusher to the inside of the feed roll in the charging port, is rotatably provided as being free of rotation of the feed roll. The direct sowing type seeder according to claim 2. 4. The filling amount adjusting mechanism according to claim 1, further comprising a filling amount adjusting mechanism that adjusts an amount of the pusher head entering the charging opening to adjust a filling amount of the seed into the charging opening. Direct seeder. 5. A filling amount adjusting mechanism is located on a side opposite to the head with a rotating fulcrum of the pusher interlocked to be rotatable and operable, and is capable of changing the distance between the inner peripheral surface of the feeding roll. The direct sowing type seeder according to claim 4, which is a bolt. 6. A filling amount adjusting mechanism includes a stopper liner which is rotatably coaxially mounted inside a pay-out roll and has a peripheral surface on which a restraining force in a radial direction can be applied to a pusher. 5. The direct sowing machine according to claim 4, wherein the adjusting cam is capable of changing a position of the head according to a rotation posture of the liner. 7. A plurality of inlets are provided at a constant circumferential pitch at a plurality of positions, and the same number of pushers are arranged so that their heads correspond to the respective inlets. 7. The direct sowing type seeding machine according to claim 6, wherein a stopper liner having the same profile is formed on the adjusting cam at a plurality of positions on the surface. 8. The pusher head according to claim 1, further comprising a protruding portion protruding outward in an insertion port at an end opposite to a rotation direction of the payout roll. Direct seeder. 9. A movable chute for providing an opening on a peripheral surface of a housing for accommodating the rotary beater and at a position below a flow path end on the pay-out roll side, and communicating the flow path end with the opening. 9. The device according to claim 1, wherein the movable chute is rotatably connected to the housing so that the distance between the beater and the inner surface of the movable chute can be adjusted by the rotational posture of the movable chute. The described direct sowing type sowing machine.