JPH07203714A - Direct seeding machine for water filled paddy - Google Patents

Abstract

PURPOSE:To provide a direct seeding machine mounting a seeding unit on a traveling vehicle of a sulky rice-transplanting machine, capable of simplifying a seeding work and certainly seeding a constant amount of seeds in spite of irregularity of tilled ground in a farm. CONSTITUTION:A horizontal sensor S1 is arranged in a working unit B, an up and down rocking sensor S2 for detecting an up and down movement of a sheet press roller 32 is arranged, the working unit B is installed on a traveling vehicle A so so to be able to control up and down and right and left rocking movements, a top shape of a drilling pin 46a is made to be a sharp angular slant in side view, the drilling pin 46a opens an auxiliary shoot by pushing a shutter 57 according to the rotation of a drill roll 46 to construct this seeder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a direct submerged sowing machine for a rice transplanter, in which a paper sheet member and a sowing member are attached to a planting portion of a conventional rice transplanter so that the cultivation management after sowing can be labor-saving. Regarding configuration.

[0002]

2. Description of the Related Art In recent years, in order to improve labor productivity in rice cultivation, a method of directly sowing seed paddy into a paddy field has been attracting attention, instead of a conventional method of transplanting seedlings into a paddy field from the seedling cost.
Further, it is also known that a conventional rice transplanter has a seed paddy direct seeder instead of the planting section.

Further, the direct sowing method involves problems such as damage to birds eating seed paddy, occurrence of weeds growing with seed paddy, and complications such as harvesting work due to the seedlings not being raised properly. A technique for covering the surface with a multi-film or a paper sheet has been developed. Conventionally, plastic materials such as polyethylene film, which has excellent water resistance and weather resistance, were used, but there were problems such as high temperature damage due to absorption of solar heat and growth suppression due to ineffective water management. Therefore, in recent years, a technique of using a paper sheet that dissolves and disappears in a flooded state for a certain period has been developed and is known.

As a mechanical technique for solving the above problems, first, regarding the coating of a sheet on a paddy field, Japanese Patent Application Laid-Open No. 5-260 is known.
No. 860 discloses a technique in which a transplanting hole is formed in a sheet by a planting claw during a transplanting operation of a riding rice transplanter.
Japanese Patent Application Laid-Open No. 5-276839 discloses a technique of using a paper sheet that dissolves and disappears within a certain period after raising seedlings as a coating material, both of which are associated with the work of transplanting seedlings, and direct seeding methods for paddy fields. Not related to. A mechanical structure in which a hole for sowing is formed in the multi-material and seed rice is directly sowed in the hole is disclosed in Japanese Patent Laid-Open No. 49-11611, which is operated manually by a person. Is not a machine. Further, the airframe floats and supports a float on the submerged water, and the seed discharge port is also arranged on the side of the float.

A conventional machine structure in which a covering member and a seeding member are mounted on a traveling machine body and the seeding is performed directly at the same time as the covering is disclosed in Japanese Patent Laid-Open No. 1-21.
5210, JP-A-1-21511, and JP-A-1-2151.
212, a seeding technique is disclosed in which a mulch sheet having seed holes is used in advance and the seed paddy is scratched on the sheet by a brush member and dropped into the seed holes. In addition, the technique of sowing using paper sheets for multi-materials is
As disclosed in 23856, on the sown field,
This is a method of coating a paper sheet that dissolves at the time of germination, and when the seedlings are raised, they are left uncoated, and problems such as the generation of weeds cannot be solved.

[0006]

According to the above-disclosed technique, a paper sheet is used in which a sowing section and a covering section are attached to a traveling vehicle body of a conventional rice transplanter, and the seeded rice seeds dissolve and disappear after being raised to some extent. Coating, perforating seeding holes in the sheet,
It is self-evident to develop a technique for sowing seed rice in the holes by scraping off the seed rice with a brush. However, in the direct sowing work in the paddy field, a flow of muddy water is generated between the field and the sheet as the machine runs, and this flow causes the seed paddy seeded in the seed hole to flow, resulting in a partial lack of stock. However, there is a problem that weeds are generated at the location. This is particularly noticeable when the airframe is supported by the float. In addition, in the paddy field, there is a tiller under the topsoil, and if the tiller is uneven, the traveling vehicle swings up and down, left and right, the seeding position moves up and down, and reliable seeding is not performed. Harm occurs. In the prior art, there is no mention of means for solving this.

Further, regarding a rotating body provided with a piercing pin for forming a seeding hole in a sheet, Japanese Patent Application Laid-Open No. 49-11611.
However, conventionally, the pin has a conical shape, and after punching, the sheet member at the edge of the hole is lifted by the pressure of the soil, and the hole contracts. It was Further, since the feeding of the paper sheet is due to the inertial force, the paper sheet is fed more than necessary, which causes an adverse effect such as wrinkling of the paper sheet.

In sowing, the amount of seeds released is not constant because the timing of seed release from the shoots is not synchronized with the movement of the rotating body for sowing the seed holes.
Furthermore, since the conventional brush for scraping seeds into the sowing holes has a flat brush shape, the seeds leaked from the side, and from the above, the amount of seeds at each sowing hole was not constant.

[0009]

The present invention uses the following means in order to solve the above problems. In other words, a rear part of the working machine mounting device including a parallel link mechanism is mounted on the rear part of the riding type traveling vehicle so that the working part is mounted on the rear part of the working part so that the working part can be swung to the left and right to be lifted up and down. Pull out while horizontally holding the paper sheet in the soil with a roller and punch out seeding holes with a piercing pin, and the seeds in the hopper are fed out by a fixed amount and dropped from the chute and with a brush. It consisted of a seeding part for scraping and seeding in the seeding hole.

Further, a support member is projected outward from both left and right sides of the traveling vehicle to support a spare sheet case for storing a spare paper sheet in the front-rear direction. In addition, a roller arm is rotatably projected forward from the rear part of the seeding frame, and a paper sheet pressing roller is arranged at the front end of the roller arm, and the paper sheet pressing roller is arranged between the paper sheet pressing roller and the seeding frame. A sensor for detecting the vertical movement of the roller is provided.

Further, in the seeding frame mounting portion at the front end of the working section, a horizontal tilt sensor is arranged near the horizontal swing fulcrum, and a horizontal tilt correcting means is provided above the horizontal tilt sensor to horizontally control the working section. .

Further, the piercing pin for piercing the seeding hole is radially projected from the outer periphery of the rotating body, and the piercing pin has a round shaft with its tip cut obliquely in a side view. Also,
In the submersible multi direct sowing machine, a rotating body for sowing hole drilling and a sowing roll are driven from the same drive source, and a chute for guiding seeds to a falling position is extended below the sowing roll, and a shutter is provided at the chute outlet. Is provided, and the shutter can be opened by rotating a piercing pin protruding from the rotating body. Further, a brush is provided at the rear portion of the lower end of the chute, the brush is formed in a V shape in plan view, and the seeds dropped on the paper sheet are scraped off to the sowing holes.

Further, in the paper sheet storage case, a core material for supporting a roll of the stored paper sheets is provided in the center of the inner surface of the case side, and the core material is urged inward by an elastic body, Both ends of the sheet roll were pressed to prevent inertial rotation above a certain level.

[0014]

When the working unit is horizontally controlled based on the detection of the left and right tilt sensor, and the working unit is floated due to the state of the field, the roller for pressing the paper sheet in the paper sheet covering unit descends, Since the sensor that detects the vertical movement lowers the working unit to increase the pressing force of the roller on the paper sheet, mud does not flow between the paper sheet and the field. On the contrary, when the working unit lowers, the roller that holds the paper sheet rises due to the reaction force received from the field, and the sensor raises the working unit. Therefore, it is possible to prevent the paper sheet from tearing due to excessive holding. In addition, by making the working part follow up and down and left and right with respect to the unevenness of the field scene, it is possible to form a reliable seeding hole with a perforating roll on the paper sheet, and to ensure that the seeds from the chute are brushed into the seeding hole. You can guide to.

Further, when the piercing pin of the rotating body for piercing the seeding hole comes into contact with the surface of the paper sheet, the front end portion first hits the paper sheet to break it, and the broken paper is cut with a wide surface cut diagonally. Since it is pressed down and buried in the soil, the seeding hole can be made large, and the hole does not shrink due to the pressure of the soil after the drilling, so that the seed can be easily guided to the seeding hole by the brush and the seed does not remain on the paper.

Further, since the shutter at the lower end of the chute is instantly opened by pressing the piercing pin by interlocking the rotation of the piercing roll and the sowing roll, the seeds discharged from the chute to one sowing hole Since the amount is constant and the V-shaped brush in plan view scrapes off the sowing holes into the sowing holes, the seeds do not leak laterally and a desired amount of seeds can be surely sowed at each sowing hole.

Further, since the shaft material of the paper sheet storage case is pressed to prevent the inertial rotation of the paper sheet, it is possible to prevent the paper sheet from being unwound more than necessary and wrinkled.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the structure of the present invention will be described based on the embodiments shown in the accompanying drawings. FIG. 1 is a side view of a flooded paper sheet-covered direct seeder of the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a side view of a working section B of the same, and FIG. 4 is a traveling vehicle body A equipped with a spare sheet roll storage case 1. 5 is a rear view of the working unit B, FIG. 6 is an assembled perspective view of the left and right horizontal control actuators of the working unit B, and FIG. 7 is a sensor structure for detecting the vertical rotation of the front sheet pressing roller 32. 8 is a side view of the vertical swing sensor S2, FIG. 9 is a side view of the auxiliary spring 36, and FIG. 10 is a right side perspective view of the sheet roll storage case 20 with the sheet guide 27 raised. 11 is a left side perspective view of the sheet roll storage case 20 with the sheet guide 27 lowered, FIG. 12 is a side sectional view showing the configuration of the sheet roll core material in the sheet roll storage case 20, and FIG. Side sectional view showing the lever structure, FIG 14 is perforated drum 46
15 is a perspective view showing the configuration of the lower end of the chute 55, FIG. 15 is a perspective view showing the shape of the punching pin 46a of the punching roll 46, and FIG. 16 is a perspective view showing the shape of the punching pin 46a ′ of the conventional punching roll 46. .

The submerged multi-row sowing machine of the present invention comprises a working section B mounted on the rear portion of the traveling vehicle A of a conventional rice transplanter. First, the traveling vehicle body A will be described with reference to FIGS. 1, 2 and 4. On the traveling frame 2, a hood 3, a steering handle 4, a driver's seat 5, etc., in which an engine is installed, are arranged. To the left and right of the vehicle, as shown in FIG.
A traveling speed change lever L1 for performing the traveling speed change and forward / reverse switching,
A seeding drive lever L2 that shifts the PTO shaft to switch seeding of the working section B and sheet punching is provided. A front wheel FW and a rear wheel RW are suspended below the traveling frame 2, and upper and lower parallel links 6 and 7 that are vertically rotatable from the left and right of the rear portion by hydraulic pressure or the like are provided in a protruding manner. Further, a mission case is provided inside the rear vehicle body, and a PTO shaft 8 is provided so as to project rearward from the mission case.

In this traveling vehicle body A, spare seat cases 1.1 are arranged in the left-right and front-rear directions so that the sheets can be replenished when the sheets are exhausted during the multi-work. The auxiliary seat case 1 is supported by fixedly supporting the support members 1b and 1c extending outward from the lower side on the traveling frame 2, and the upper part thereof is hinged and has a case cover 1a which can be opened upward. The sheet roll supporting members 1d, 1d, ... When the paper sheet roll for coating is stored in the spare sheet case 1, the case cover 1a is opened as shown in FIG. 4, and the sheet roll is placed on the sheet roll supporting members 1d. The case cover 1a is closed.

With this configuration, when direct sowing work is performed in a wide field or the like, if the paper sheet runs out during the work, the traveling is stopped there and the paper is stored in the spare sheet roll storage case 1 of the traveling vehicle body A. The seats can be replenished, which contributes to the improvement of work efficiency. Further, since the seats are arranged on the left and right sides of the front part of the traveling vehicle body A, the weight balance becomes good, and the deterioration of the traveling performance can be prevented.

Next, the working section B will be described. The working unit B forms a paper sheet covering unit including a sheet roll storage case 20, front and rear sheet pressing rolls 32 and 33, a perforating roll 46 and the like, and a seeding unit including a seed hopper 54, a chute 55 and the like. First, a method of mounting the vehicle body A will be described with reference to FIGS. 2 and 3. The front end of the working part B is mounted on the rear part of the working machine mounting device including the left and right parallel links 6 and 7 provided on the rear part of the traveling vehicle A,
A connecting plate 9 is laterally provided at a rear portion between the left and right parallel links 6 and 7, and a bearing 9a is formed on the connecting plate 9. On the other hand, the outer seeding frames 10a and 10a and the inner seeding frames 10b and 10b that are extended back and forth in the working section B
The seeding frame 10 is composed of the rear horizontal frame 10c and the rear horizontal frame 10c, and the outer seeding frames 10a, 10a and the inner seeding frames 10b, 10b are integrally connected at the front portion with the sheet roll storage case 20 and the like, and to the connecting portion. The swing shaft 11 is provided so as to project forward and incline upward. The swing shaft 11 is connected to the bearing 9a of the connecting plate 9 of the traveling vehicle A.
The work unit B is mounted on the rear portion of the traveling vehicle body A so as to be swingable right and left by being rotatably fitted in the work unit B. As described above, since the parallel links 6 and 7 can be turned up and down, the working unit B can be moved up and down. The transmission system from the traveling vehicle A to the working unit B is transmitted from the PTO shaft 8 to the input shaft 13a of the bevel gear case 13 via the universal joint 12.

Next, the horizontal swing control mechanism of the working section B will be described. Between the left and right parallel links 6 and 7 of the traveling vehicle body A, as shown in FIG. 6, the lateral feed shaft 14 is rotationally driven by the motor M as the left and right tilt correction means, and the sliding feed ring 14 is provided on the lateral feed shaft 14 in an annular manner. A drive mechanism for the sliding tool 15 is arranged so as to slide the moving tool 15 left and right. And working unit B
As shown in FIG. 3, spring support columns 16 and 16 are provided above the left and right upper portions of the sheet roll storage case 20. As shown in FIG.
The swing correction springs 17 and 17 are connected to the left and right ends of a spring connecting member 15a that connects to the sliding tool 15, and further the left and right holding springs 18 and 18 are fixedly mounted on the traveling vehicle body A side. It is connected to the spring support member 19. With such a configuration, the working portion B is held horizontally by the urging force of the holding spring 18 toward the center, and when the tilt angle cannot be held by the holding spring 18, The horizontal sensor S1 arranged at the front of the inner seeding frame 10b
The left / right inclination of the working unit B is detected, and based on the detection, the motor M is controlled to rotate forward / reversely to slide the sliding tool 15 to the opposite side of the inclination, and the swing correction springs 17 and 17 are used. The spring support columns 16 and 16 are horizontally swung to the opposite side of the inclination to horizontally control the working unit B.

Next, the structure of the paper sheet covering portion of the working portion B will be described. The covering unit feeds the covering paper sheet S stored in the front sheet roll storage case 20 while pressing it on the field with the front and rear sheet pressing rollers 32, 32, and rotates the perforating roll 46 to rotate on the field. A seeding hole is formed in the paper sheet S laid on the. First, FIG.
13 to 13, the configuration of the sheet roll storage case 20 will be described. The sheet roll storage case 20 is a case for storing a roll of the paper sheet S in the left-right direction, and has a rear lower portion opened for sheet feeding. Lids 21 and 21 on both sides
Is arranged so that it can be opened and closed, and is normally locked by locking a rotatable opening / closing lever 22 to a lock pin 23.
Further, as shown in FIGS. 11 and 12, core members 24, 24 of the paper sheet roll are provided in a protruding manner at the inner center portion of the lids 21, 21. A sleeve portion 24a is provided at the base end of the core member 24.
Is formed and is urged toward the inside of the case by an elastic body, for example, a coil spring or the leaf spring 25 used in this embodiment, and the sleeve portions 24a, 24 are urged by this urging force.
The a presses the center of the sheet roll from both sides to prevent the paper sheet S from being unrolled more than necessary by the inertial rotation of the sheet roll, thereby preventing the paper sheet S from wrinkling. In addition, as shown in FIG.
Is screwed, the outer end of which is projected to the outside of the lid 21, and the adjustment knob 24c is attached to the outer end,
By rotating the adjusting knob 24c, the inner end position of the core member 24 is changed to the left and right, and the position can be adjusted to an appropriate position according to the left and right width of the sheet roll.

Further, as shown in FIGS. 10 and 11, a waterproof sheet 26 for vertically pressing the paper sheet S from the upper portion of the paper sheet feeding opening of the sheet roll storage case 20 is vertically provided. The waterproof sheet 26 is made of a soft polyethylene material or the like, and has a function of guiding the paper sheet to the lower side of the front sheet pressing rollers 32, 32, while the front sheet pressing roller 32. Three
The paper sheet S is pulled rearward at 2 and is likely to be torn due to muddy water, and the paper sheet S is protected so as not to be broken below the front sheet pressing rollers 32. .

.., which are a plurality of linear members, are arranged below the opening so as to be vertically rotatable around a pivot shaft 27b as a fulcrum. A plate member 27a is fixed to the front portion of the plate 27 for reinforcement. The sheet guide 27 can be fixed at two upper and lower positions by sheet guide levers 28. The base end portion of the sheet guide lever 28 is fixed to both ends of the rotating shaft 27b of the sheet guides 27, 27 ... And the vertical movement of the sheet guide lever 28 causes the rotating shaft 27b to move. The sheet guide 27 can be rotated to rotate up and down. Similarly, a fixing plate 29 is fixedly provided at the base end portion, and fitting holes 29a and 29b are formed at two positions of the fixing plate 29, and the rotation shaft is provided on the side surface of the sheet roll storage case 20. A steel ball 30 for detent as shown in FIG. 13 is arranged at the rear portion of 27b, and when the steel ball 30 is fitted into one of the fitting holes 29a and 29b of the fixing plate 29, it is fixed. ing. And
When pulling out the leading edge of the paper sheet S from the sheet roll storage case 20 at the start of work or the like, the sheet guide 27 is inclined downward so that the opening portion is widely opened.
When the sheet guide lever 28 is horizontally tilted like 0, the steel ball 30 is fitted into the fitting portion 29a and the sheet guide lever 28 and the sheet guide 27 are fixed. When the paper sheet S can be pulled out and set in a workable state, the sheet guide lever 28 is moved to the position shown in FIG.
When raised as shown in FIG. 1, the steel ball 30 is fitted into the fitting portion 29b, the sheet guide 27 becomes horizontal, and the work state is brought into close contact with the lower side of the paper sheet S.

During work, the sheet guide 27
27 ... are buried in the soil and support the paper sheet S from below. That is, the sheet pressing roller 32 described later.
If the paper sheet S is buried in the soil due to the pressing force only by being pressed from above by the 33 or the perforating roll 46, it may cause wrinkles, and the perforating roll 46 may perforate the seeding holes. The setup is also uncertain. By supporting the paper sheet S from below by the sheet guide 27, the paper sheet S is held horizontally on the field, and the seeding holes are surely formed.

Next, the sheet pressing roller for pressing the paper sheet S against the field surface and the vertical position control structure of the working unit B based on the vertical rotation thereof will be described with reference to FIGS. 1 to 3 and 7 to 9. To do. Inner and outer seeding frames 10a and 10b
Outside the both ends of the rear horizontal frame 10c, which is connected and fixed from the rear end, the rear sheet pressing rollers 33, 33 are provided.
And the rear seat pressing rollers 33.3
The outer end of the shaft 33a of No. 3 is pivotally supported by the rear end of the roller arms 31, 31. That is, as shown in FIG. 7, the front ends of the roller arms 31, 31 are rotatable up and down about the shafts 33a, 33a of the rear sheet pressing rollers 33, 33, and the front part is interposed between the left and right roller arms 31, 31. The sheet pressing rollers 32, 32 are rotatably provided horizontally. The sheet pressing rollers 32 and 33 press the paper sheet S pulled out from the sheet roll storage case 20 in the field scene, and the paper sheet S is continuously fed out from the sheet roll storage case 20 as the machine body moves forward. It is done.

Further, a sensor standing frame 34 is fixedly mounted between the left and right roller arms 31, 31 between the front sheet pressing rollers 32, 32, and the sensor standing frame 34 is vertically swung from around the center thereof. The sensor S2 is erected, while the shaft members 37, 37 are fixed to the outer seeding frames 10a, 10a via the support plates 38, 38, and the spring connecting plate 35 fixed on the sensor erection frame 34.・
Auxiliary springs 36, 36 are connected between 35 and the shaft members 37, 37.

The structure of the vertical swing sensor S2 will be described. A sensor lower frame 39 having a U-shape in a front view is erected on the sensor standing frame 34, and a lower end portion of a sensor arm 40 having an inverted U-shape in a plan view is pivotally supported on the left and right upper ends thereof. This is because the sensor standing frame 34 moves in the front-back direction as the roller arms 31, 31 rotate up and down, but the sensor arm 40 can move in the vertical up-down direction regardless of the forward-backward movement. This is because. Then, the sensor support frame 41 is provided laterally between the outer seeding frames 10a and 10a.
The U-shaped spring support frame 42 is fixed to the above, and the spring support shaft 43 is provided between the side end portions of the spring support frame 42.
Long holes 40a formed on both sides of the sensor arm 40
It is inserted in 40a and is provided horizontally. As a result, the front of the roller arms 31, 31 of the spring support shaft 43 that is integrally connected and fixed to the rear horizontal frame 10c that pivotally supports the rear sheet pressing rollers 33, 33 via the outer seeding frames 10a, 10a and the like. The relative vertical position with respect to the sensor arm 40 that vertically swings integrally with the part changes as the roller arms 31 and 31 vertically swing. The rear end of the sensor wire 45, which connects the parallel links 6 and 7 of the traveling vehicle body A to the vertical rotation operation mechanism, is supported on the upper part of the sensor arm 40 so as to be expandable and contractable.
A vertical correction spring 44 is connected to the spring support shaft 43 from the rear end of the sensor wire 45. The auxiliary spring 36
The reference numeral 36 is arranged so that the sensitivity of the vertical correction spring 44 of the vertical swing sensor S2 functions even at the left and right positions of the working section B.

By mounting the vertical swing sensor S2 and the auxiliary spring 36 as described above, first, in the range in which the front sheet pressing rollers 32, 32 slightly move up and down with respect to the unevenness of the field, The roller arms 31, 31 are held at the initial position by the urging forces of the vertical correction spring 44 and the auxiliary springs 36, 36 of the swing sensor S2, and the front sheet pressing rollers 32, 32 are held at a constant height. It has the effect of leveling the surface of the field. During this time, in the vertical swing sensor S2, the sensor wire 45 is not expanded or contracted by the expansion and contraction of the vertical correction spring 44, and therefore the vertical drive mechanism of the parallel links 6 and 7 in the traveling vehicle body A does not operate. When the traveling vehicle body A moves up and down due to the unevenness of the cultivator in the field, the rear seat pressing rollers 33, 33 that move integrally with the traveling vehicle A move up and down, but the front sheet pressing rollers 32, 32. Follows the surface of the field, so that the roller arms 31, 31 relatively rotate up and down. When this vertical rotation angle exceeds a certain angle, the expansion and contraction of the vertical correction spring 44 increases, the sensor wire 45 expands and contracts, and the parallel link 6
The expansion and contraction is transmitted to the vertical drive mechanism 7 of FIG. Then, the working section B is vertically controlled by the parallel links 6 and 7 to follow the height of the field, and sowing is performed at an appropriate height. Since the seeding is performed at the rear part of the working unit B, the working unit B can be corrected to an appropriate height before seeding by detecting the vertical swing at the front part of the working unit B. .

Next, the structure of the perforating roll 46, which is a rotating body, will be described with reference to FIGS. 1 to 3, 5, and 14 to 16. Shaft support plates 48, 48 extend downward from the outer seeding frames 10a, 10a, and the rotary shaft 47 is pivotally supported by the shaft support plates 48 so as to be rotatable in the left-right direction. The rotary shaft 47 has a perforating roll 46.4 having a desired number of seeding lines.
6 are fixed, and further the drive pulley 49 is fixed, and the drive belt 50 is wound around the working portion drive shaft 13b of the bevel gear case 13. Since the working unit drive shaft 13b is also transmitted to the seeding roll 52, which will be described later, of the seeding unit, the drive of the seeding unit and the piercing roll 46 is interlocked.

The perforating rolls 46 are radially provided with perforating pins 46a, 46a, ... Although the conventional piercing pin 46a ′ has a conical shape as shown in FIG. 16, there is a problem that the seeding hole is contracted by the pressure from the soil after the piercing. Therefore, if the shape of the piercing pin 46a is, as shown in FIG. 15, the tip of the cylinder is cut obliquely and the one that becomes the front end when contacting the paper sheet S is made into an acute angle shape, the seeding hole has a front end. The wide surface cut more reliably at the tip of the boring pin 46a and obliquely cut allows it to be pushed into the soil, and the seeding hole will not shrink after boring.

The structure of the covering part is as described above. Next, the structure of the sowing part is shown in FIGS. 1 to 3, 5, and 14.
More will be described. The hopper support frame 51.5 is provided between the rotary shaft 47 of the punching roll 46 and the rear horizontal frame 10c.
1 is erected on the left and right, and both hopper support frames 5
1, the inner and outer seeding frames 10a and 10b are connected and fixed, and a rotary shaft 65a of a cutter lever 65 described later.
However, the two hopper support frames 51 are loosely fitted to the left and right. Seeding rolls 52 are laterally provided on the inner upper side of each hopper support frame 51, and flexible wires 53, 53 are connected to the rotating shafts of the seeding rolls 52, 52 from both ends of the working portion drive shaft 13b of the bevel gear case 13. 5
2a and 52a connected to the sowing roll 52.5
2 is rotationally driven. Also, each rotary shaft 5
A clutch is provided on 2a, and a switching knob 52b is attached to the outer end of the rotary shaft 52a as shown in FIG. 5, and by pulling the switching knob 52b to the outside,
The clutch provided on the rotary shaft 52a can be disengaged, and the rotational drive of the seeding roll 52 can be disengaged. That is, it is possible to stop the sowing of only the strip to be sowed by the seeding roll 52, and it is used when the seeding strips are overlapped at the time of turning the headland and the like.

At the top of each hopper support frame 51,
A seed hopper 54 is provided. Seed hopper 54
Is a seed paddy that has been subjected to a treatment such as coating with an oxygen supply agent. The lid 54a is openably and closably covered on the upper part, and the bottom part faces the seeding roll 52 and the chute 55 described later. It is open. Then, in the rear part of each hopper support frame 51, a chute 55 branched into the desired number of seeding lines is arranged, and the upper end part thereof is
The bottom end of the seed hopper 50 is arranged at the bottom of the seed hopper 50, and the bottom end of the seed hopper 50 is arranged immediately behind each seeding roll 52. With such a configuration,
When the sowing roll 52 is rotationally driven, the sowing roll 52 feeds the seed paddy from the seed hopper 50 by a constant amount and sends it into the chute 55.

As shown in FIG. 14, an auxiliary chute 56 having a U-shape in plan view is attached to the lower end of each chute 55. The auxiliary chute 56 is for temporarily storing seeds that have fallen inside the chute 55, and a shutter 57 is attached to the front part of each auxiliary chute 56 so as to be rotatable forward and backward, and is usually a spring 57a. The shutter 57 is closed by the urging force of the seed so that the seed paddy is accumulated in the auxiliary chute 56. When the perforating roll 46 rotates and the perforating pin 46a lifts the shutter 57, the shutter 57 rotates and the auxiliary chute 5 moves.
6 is opened, and a certain amount of seed rice is dropped onto the paper sheet S. Further, spring steel wire rods 58 are extended from both side surfaces of each auxiliary chute 56 to the immediate lower side of the perforation roll 46 disposed in the front part thereof, and the seeding roll 52 forms a seeding hole in the paper sheet S. Immediately after punching, the paper sheet S is prevented from being lifted up together when the punching pin 46a is lifted up from the seeding hole.

Further, behind the lower end of each chute 55,
A V-shaped brush 59 in plan view (two brushes may be combined in a V shape) is provided. The brush 59 collects the seeds dropped on the paper sheet S, holds the seeds as the vehicle advances, and guides the seeds to the seeding holes in the seeding holes of the paper sheet S drilled immediately before the seeds. The brush 59 is hung vertically from the lower surface of the L-shaped detent member 60, and the sliding shaft 61 is erected vertically from the front part of the lower horizontal surface of the detent member 60. The shaft support plate 63 is fixed to the rear horizontal frame 10c,
An upper portion of the sliding shaft 61 is loosely fitted to the shaft support plate 63 to support the whirl-stop member 60 and the brush 59 in a vertically slidable manner,
A push spring 62 is provided around the sliding shaft 61 from the shaft support plate 63, and the paper sheet S is attached to the brush 59 by a constant spring biasing force.
The pressing force is applied to the brush 59 so that the brush 59 can follow the paper sheet S with a constant pressing force. In this way, the brush 59 can be slid up and down with respect to the paper sheet S and can be followed by the spring biasing force, so that the brush 59 is always in contact with the paper sheet S at a right angle, and the seeds come into contact with the paper sheet S. It does not protrude from between the sheets S. Also,
The rear vertical portion of the whirl-stop member 60 is disposed immediately behind the rear horizontal frame 10c, so that the whirl-stop member 60 cannot rotate in the left-right direction, and the brush 59 moves left and right. It does not occur that the rice seeds are misaligned and not collected in the correct position.

The configuration of the seeding section is as described above, and as the other configuration of the working section B, the sheet cutter 64 and the marker 66 will be described with reference to FIGS. 1 to 3 and 5. The sheet cutter 64 is arranged at the rear part of the working section B, and is attached to the paper sheet S at the end of the one-seeding step.
Used when cutting. As shown in FIG. 5, it is a saw-shaped cutter and can be easily cut by bringing it into contact with the paper sheet S and advancing the machine body.
Of the rotary shaft 65a pivotally supported by the hopper support frame 51 so that the lowering operation can be performed at the driver's seat 5 of the traveling vehicle A.
A cutter lever 65 that rotates up and down around the center of the seat 5 extends from the seat cutter 64 to both sides of the working section B and to the immediate rear of the driver's seat 5. Return springs 65b from the cutter lever 65 to both sides of the sheet roll storage case 20.
When the 65b is connected and not operated, the sheet cutter 64 is held in the initial state shown in FIGS. 1 and 3 (the state where the sheet cutter S does not contact the paper sheet S), and when the sheet is cut, the user sits in the driver's seat 5. When the operator manually pushes up the front end portion of the seat lever 65 rearward, the sheet cutter 64 at the rear end portion is lowered and the paper sheet S is cut. Then, at the time of turning to the next step, the parallel links 6 and 7 are driven to raise the working unit B, but at this time, since the paper sheet S is held from below by the sheet guide 27, the paper sheet S is held from the field. Can be peeled off and lifted.

The left and right markers 66, 66 are rotatably attached to the outer end of the rotary shaft 65a of the cutter lever 65, and can be vertically rotated by lever operation from the traveling vehicle body A. In the one sowing step, the marker 66 on the side of the next sowing step is lowered to draw a line on the field along with the sowing work, and the marker 66 on the opposite side is already seeded, so that it is kept above. Then, when the next sowing process is started, the line drawn by the marker 66 in the previous process is aligned with the lateral center of the traveling vehicle body A. In this way, there will be no gaps or too close contact between the seeding lines.

[0040]

Since the present invention is constructed as described above,
It has the following effects. That is, by using a traveling vehicle of a conventional rice transplanter, by mounting a working unit that forms a paper sheet coating unit and a seeding unit, a paper sheet coating type flooded direct seeder can be configured. At the same time as covering the sheet, the seeding holes can be drilled in the sheet so that the seeds can be directly sown, eliminating the need for rice planting.In addition, until the seedling of rice, the surface of the field is covered with a paper sheet to cause weeds. Instead, the paper sheet dissolves after constant seedling, eliminating the need for removal work and greatly improving rice production efficiency. Further, since the working section is not supported by the float and the paper sheet is covered while being pressed by the rollers, the seed paddy is prevented from flowing out by the flow of mud.

Further, as described in claim 2, the working unit is controlled to move up and down so that the roller follows the unevenness of the field surface based on the sensor for detecting the vertical movement of the roller for pressing the paper sheet. Since the seedlings became constant, the harmful effects such as the outflow of seed rice after sowing were prevented, and the seeds could be surely seeded.

Further, according to the third aspect of the invention, the left and right tilt correcting means is driven by the signal from the left and right tilt sensor to be horizontally controlled with respect to the traveling vehicle body which swings left and right due to the unevenness of the field tiller and the like. As a result, the left and right sowing depths became constant, and this also prevented the harmful effects such as the outflow of seed paddy after sowing, and ensured the sowing.

Further, according to the fourth aspect of the invention, when the seeding holes are punched in the paper sheet, the seeding holes are surely broken by the pins and embedded in the soil. As a result, the broken pieces do not rise, the seeding holes do not shrink, and the target amount of seed paddy can be seeded in the seeding holes.

Since the shutter at the lower end of the chute is opened by pressing the boring pin as in claim 5, the sowing of the sowing hole and the seed release are synchronized, and the shutter is released without a time lag. The target amount of seeds is surely released by releasing the seeds at a constant time, and the target amount of seeds is surely released from the shoots.

According to the sixth aspect of the present invention, the seed paddy that is discharged with the V-shaped brush in plan view is scratched so that the seed paddy can be collected in one place without forming a complicated mechanism, and the seed pad can be surely placed in the seeding hole. The target amount of seed can be scraped off and sown.

Further, according to the seventh aspect, since the roll of the paper sheet is pressed from both sides, the roll of the paper sheet does not rotate due to inertia, and therefore the paper sheet is not unwound more than necessary. The harmful effects such as wrinkles are eliminated. The present invention provides a coated direct seeder having excellent performance as described above.

[Brief description of drawings]

FIG. 1 is a side view of a flooded direct seeder of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a side view of a working unit B of the same.

FIG. 4 is a perspective view showing a traveling vehicle body A on which a spare sheet roll storage case 1 is mounted.

5 is a rear view of the working unit B. FIG.

6 is an assembled perspective view of the left and right horizontal control actuators of the working unit B. FIG.

FIG. 7 is a partial perspective view showing a sensor structure for detecting vertical rotation of a front sheet pressing roller 32.

FIG. 8 is a side view of a vertical swing sensor S2.

9 is a side view of an auxiliary spring 36. FIG.

FIG. 10 is a right side perspective view of the sheet roll storage case 20 with the sheet guide 27 raised.

FIG. 11 is a left side perspective view of the sheet roll storage case 20 with the sheet guide 27 lowered.

FIG. 12 is a side sectional view showing a configuration of a sheet roll core material in the sheet roll storage case 20.

13 is a side sectional view showing a lever structure for operating the sheet guide 27. FIG.

FIG. 14 is a perspective view showing a configuration of a punching roll 46 and a lower end portion of a chute 55.

FIG. 15 is a perspective view showing the shape of a piercing pin 46a of a piercing roll 46.

16 is a perspective view showing the shape of a piercing pin 46a ′ of a conventional piercing roll 46. FIG.

[Explanation of symbols]

 A Traveling vehicle B Working part S1 Horizontal sensor S2 Vertical swing sensor 1 Spare seat roll storage case 13 Bevel gear case 20 Seat roll storage case 24 Core material 25 Leaf spring 31 Roller arm 32 Front seat pressing roller 33 Rear seat pressing roller 36 Auxiliary Spring 44 Vertical correction spring 45 Sensor wire 46 Drilling roll 46a Drilling pin 52 Seeding roll 54 Seed hopper 55 Chute 56 Auxiliary chute 57 Shutter 59 Brush

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display area A01G 13/00 303

Claims (7)

[Claims] 1. A rear part of a riding type traveling vehicle is equipped with a working machine mounting device having a parallel link mechanism, and a working frame is mounted on the rear part of the working part so that the working part can be horizontally swung. The case is placed horizontally and the paper sheet is pulled out while holding it in the soil with the roller, and the paper sheet covering part that pierces the seeding holes with the piercing pin and the seeds in the hopper are delivered by a fixed amount and dropped from the chute. A direct submerged seeder consisting of a seeding part that is scraped into the seeding holes with a brush and seeded. 2. A roller arm is vertically rotatably projected forward from a rear portion of the seeding frame according to claim 1, and a paper sheet pressing roller is arranged at a front end of the roller arm. A flooded direct sowing machine, characterized in that a sensor for detecting the vertical movement of the paper sheet pressing roller is arranged therebetween. 3. The seeding frame mounting portion at the front end of the working unit according to claim 1, wherein a left and right tilt sensor is arranged near the left and right swing fulcrum, and a left and right tilt correcting means is provided above the left and right tilt sensor to form the working unit. A direct sowing machine for flooding, which is controlled horizontally. 4. The piercing pin for piercing a seeding hole according to claim 1, wherein the piercing pin is radially projected from the outer periphery of the rotating body, and the piercing pin has a round shaft with its tip cut obliquely in a side view. A flooded direct seeder. 5. The direct submersion system of claim 1, wherein the same driving source drives the rotating body for seeding hole drilling and the seeding roll, and the seeds are dropped to a position below the seeding roll. A submerged direct seeding machine characterized in that a chute for guiding is extended, a shutter is provided at an outlet of the chute, and the shutter can be opened by rotation of a piercing pin protruding from the rotating body. 6. The flooded direct sowing machine according to claim 1 or 5, wherein a brush is provided at the rear part of the lower end of the chute, the brush is formed in a V shape in plan view, and seeds dropped on the paper sheet are sown. A direct water sowing machine characterized by being configured to be scraped off. 7. A paper sheet storage case for storing a roll of a paper sheet so that the roll can be pulled out backward. A core material for supporting the stored roll of paper sheet is provided in the center of the inner surface of the case side, and the core material is elastic. A submerged direct seeder, which is urged inward by a body to press both ends of a paper sheet roll to prevent inertia rotation above a certain level.