KR20000075372A - Direct sowing machine - Google Patents

Abstract

In the conventional straight-wave device of gel-coated seeds, since the gel-coated seeds are sown through the seeding pipes extending from the seed hopper, clogging in the seeding pipes is likely to occur, and a certain number to a certain depth is achieved. There was a problem that sowing is difficult.

Therefore, in the present invention, apart from the seed hopper 41 containing a large number of the gel-coated seeds 40, the egg for securing the gel-coated seeds 40 supplied from the seed hopper 41 in a specific position is reliably supported. The support hopper 42 was installed and the seeding arms 31 capable of swinging up and down were gripped one by one and the seeded gel-coated seeds 40 were seeded at regular intervals.

Description

Direct Wave Device {DIRECT SOWING MACHINE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for planting spherical seeds or coated seeds, in particular gel coated seeds in which the seeds are coated with a gelling agent. It relates to a straight wave device that enables.

Conventionally, seedling mats were planted in seedling boxes to make seedling mats, and the seedling mats were placed on the seedling mounts of rice transplanters for transplanting, but the seeds were grown from nails to seedlings, while the soil was tilled to draw water and harrow. It required a lot of effort and time.

Therefore, direct cultivation has been proposed which eliminates many of these work strokes and aims to save labor. In direct cultivation, seed is sown in the original paddy field, which is covered with soil, and it grows without filling with water for a while after germination. There is a freshwater straight wave that grows with shallow water after planting on the surface, and appropriate use is made depending on the climate and soil conditions, respectively.

At present, the application of the gel-coated seed which coat | covered the seed with the elastic polymer gel containing oxygen, a nutritional substance, a chemical | medical agent, etc. is advanced in such a direct cultivation. Representatively, there is a straight wave in freshwater soil where the gel-covered seeds are buried in the soil of a matched and harrowed faucet and filled with sufficient water, and in the freshwater soil, the seeds germinate without choking even when the seeds are buried in the harrowed soil. . This is the effect of oxygen contained in the elastic polymer gel, and since the rice grown from the seed by the straight wave in the freshwater soil is supported by the surrounding soil in the same way as the rice grown from the seedling seeded with the conventional seedling, Germination is remarkably improved as compared with the said healthy or fresh water wave.

Of course, the gel-coated seeds are also applied to the above-mentioned dry and fresh water waves, which are conventionally used, which are effective for protecting the seeds from damage from being eaten by the animals or sterilizing the seeds, and facilitating the handling of the seeds by increasing the particle size. The germination rate can be improved by the absorption of the nutrient substance in the polymer gel, in addition to making the seeding work more efficient.

However, in the wave directing device used for the straight wave in the fresh water soil of the gel-coated seed, it is comprised so that a gel-forming seed may fall in the seeding groove | channel by a groove forming machine through the seeding pipe extended from the seed hopper of a gas upper part. There existed the following problem conventionally.

That is, since the gel-coated seeds are substantially spherical, they are often rolled and moved in the seeding groove to a position different from the dropping point, so that there is a problem that the seeding at regular intervals is difficult even if the seeding drops at regular intervals.

In addition, since the gel-coated seeds are simply dropped into the seeding grooves, all gel-coated seeds are not located at the bottom of the seeding groove, but may stop in the middle without falling to the bottom.

Particularly, conventionally, since sowing and scattering were the mainstream, there was a problem that the seeding amount was more than necessary, the rice was excessively overgrown, the number of invalid cereals was increased, the stems were thin, and the ear was short, and it was easy to become poor rice. .

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a side view of a state in which the direct wave device of the present invention is mounted on a rear portion of a tractor.

2 is a rear view of a state in which various blades are mounted on the blade shaft of the rotary tiller.

3 is a partial cross-sectional side view of the seeding device.

4 is a partial cross-sectional back view of FIG. 3.

5 is a partial cross-sectional side view of the seed hopper.

6 is a plan view of the supply case.

7 is a partial cross-sectional side view of the support hopper.

8 is a front view of FIG. 7.

9 is a plan view of FIG. 7.

10 is a side view of the seed holder.

11 is a front view of FIG. 10.

It is a figure which shows the reciprocation timing of a seed holder.

It is a figure which shows the rocking mechanism of a seeding arm.

Fig. 14 is an inner side view showing the driving configuration of the push rod, Fig. 14A is an inner side view showing a state in which the push rod is stored, and Fig. 14B is an inner side view showing the state in which the push rod is protruded. to be.

The problem to be solved by the present invention is as described above, and means for solving the problem will be described next.

That is, in the claim 1, in the direct wave device in which the gel-coated seeds are embedded in the soil of the harrowed faucet, the gel-coated seeds supplied from the seed hopper are separated from the seed hoppers containing a large number of the gel-coated seeds in a specific position. There is provided a seeding device in which a support hopper for reliably separating and supporting one egg is provided, and a seeding arm capable of swinging up and down is disposed so that the supported gel-coated seeds are held one by one and sown at a predetermined interval.

In the claim 2, in the rear part of a rotary tillage apparatus, a fertilizer apparatus and a chemical | medical agent spreading apparatus are provided in parallel with a some seeding apparatus, and the direct wave apparatus which carries out plural tank seeding, fertilization, and chemical | medical agent spreading continuously. Apart from the seed hopper which accommodates a large number of gel-coated seeds, a support hopper is provided for separating and supporting the eggs which secured the gel-coated seeds supplied from the seed hopper to a specific position, and each of the supported gel-coated seeds is placed one by one. There is provided a seeding device in which a seeding arm capable of swinging up and down that is gripped and seeded at a predetermined interval at a predetermined depth is disposed.

In the seeding arm of Claim 1 or 2, the seeding arm of Claim 1 or 2 WHEREIN: The push rod is protruded and stretched from the front end of a seeding arm main body, and the gel-coated seed supplied from the said seed hopper can be latched on the push rod front end. The seed holder is fixed.

The seed hopper according to claim 1, wherein in the seed hopper, a supply case having a shutter function is provided under the seed hopper, and the shutter of the supply case is opened so that one gel-coated seed falls into the support hopper. When the support is completed, the seeding arm holds the gel-coated seed, descends to finish the sowing, and moves again until the gel-coated seed is moved to the position where it can be grasped.

Next, embodiments of the invention will be described.

First, the whole structure of the waveguide device which concerns on this invention is demonstrated with reference to FIG.

The rotary tillage device R is attached to the work machine mounting device installed at the rear of the tractor T so that the lifting and lowering is possible. The straight wave device 50 according to the present invention is mounted on the rear of the depth frame 13 of the rotary tiller R. FIG. The linear wave device 50 can be lifted and lowered by the hydraulic device of the tractor T together with the rotary tillage device R. As shown in FIG.

The rotary tillage device R receives power from the PTO shaft of the tractor T via a universal joint or the like and enters the rotary box through the transmission shaft and the chain case 14 from the gear box. R) Power is transmitted to the blade shaft 1 which has been horizontally installed in the lower part, and is driven to rotate.

Here, the blade shaft 1 is provided with a plurality of three types of blades, a straightness 2, an ax blade 3 and a grooved excavator blade 4, among which a grooved excavator blade 4 ) Is mainly used in the above-mentioned healthy straight waves, digging deeply into the soil to excavate drainage grooves to improve drainage during heavy rain. In addition, the straightness 2 rotates to form a seeding groove, and the ax blade 3 digs the topsoil in the tillage width to grind the weeds on the surface, and at the same time, forms an optimal tillage layer to prevent weed germination. Although it is ensured, excavation by the said straightness 2 or the ax blade 3 can also be abbreviate | omitted as long as the harrow is already enough and the seeding by the seeding arm mentioned later can be performed suitably.

That is, by arranging such a plurality of types of blades so as to be able to be mounted at an appropriate position, sowing can be carried out in direct cultivation other than the direct wave in the freshwater soil. It is possible to form a suitable seeding surface.

The straight wave device 50 according to the present invention is composed of a seeding device 49, a fertilizing device 51, a chemical | medical agent spreading device 52, etc. which were arrange | positioned in order from the front to the back of a gas, among which the seeding apparatus The 49, the fertilizer 51, and the chemical | medical agent spreading | diffusion apparatus 52 are arrange | positioned for every group, and the chemical | medical solution tank 19 is arrange | positioned behind the said chemical | medical agent spreading apparatus 52, respectively.

The seeding groove excavation disk 5 is arrange | positioned by the seeding groove | channel formation machine in the position just behind rotary tillage device R in the whole seeding apparatus 49. As shown in FIG. The seeding groove excavating disk 5 is arranged in a V-shaped view of two disks in a plan view and closes the tip, and forms a groove as it proceeds, and the position of the seeding groove excavated by the straightness 2 and Is consistent.

Although the seeding groove is once formed by the straightness 2, the seeding groove is slightly buried when excavated together with the ax blade 3 or the grooved excavator blade 4, so that the seeding groove excavation disk 5 The excavation is carried out again to prepare the seeding groove. The seeding grooved excavation disk 5 can also be omitted in the same manner as in the straightness 2 as long as it is sufficiently harrowed.

The fertilizing disc 6 is arranged with a fertilizer groove former at a position rearward of the seeding device 49 and slightly eccentrically to prevent the fertilizer from contacting the seed, and the fertilizing disc 6 excavates the seeding groove. Similarly to the disk 5, two disks are arranged in a V-shape in plan view to close the tip, and a fertilizing pipe 11 is inserted between the disks from the top. The upper end of the fertilizing pipe 11 communicates with the fertilizer seeding device 15 so that a certain amount of fertilizer particles supplied from the fertilizer hopper 9 falls.

The cover disk 7 is arrange | positioned at the back of the said fertilizing disk 6, and it is made to cover soil with the seed or fertilizer which fell. Then, the chemical | medical agent pipe | tube 22 extended in communication with the lower part of the chemical | medical agent spreading apparatus 53 is extended, and the chemical | medical agent is spread from the covered stomach. And the rear part roller 8 which suppresses an entire coarse powder is arrange | positioned at the rear part.

A chemical liquid discharge pump 20 is disposed below the chemical liquid tank 19 above the suppressor roller 8, and a spray nozzle 21 is disposed below the chemical liquid discharge pump 20 through a hose, and a chemical liquid discharge pump is disposed. 20 is driven by the rotation of a motor or a grounding wheel, and the chemical liquid is sprayed from the spray nozzle 21 by the driving of the chemical liquid discharge pump 20 so as to disperse the medicine from the suppressed soil. It is.

However, the discharging direction of the dispersion nozzle 21 is rearward, and is arrange | positioned so that it may not be caught by the suppression roller 8, and a guide plate may be provided so that it may not scatter by wind etc. In addition, as long as it can spread | disperse with the tillage width | variety of the rotary tillage device R, one or more spreading nozzles 21 can also be provided. However, the planting part of the rice transplanter may be separated and instead, it may be configured to mount the straight wave device 50 of the present invention so that the straight wave may be straight after the harrowing.

Next, the seeding apparatus 49 which concerns on this invention is demonstrated.

As shown in FIG. 3, FIG. 4, the seeding apparatus 49 is the seed hopper 41 provided in front of the said fertilizer hopper 9, and the gel-coated seed 40 provided below the said seed hopper 41. As shown in FIG. And a support hopper 42 for separating and supporting the eggs, which are secured at a specific position, and a seeding arm 31 for holding the gel-coated seeds 40 supported by the support hopper 42 one by one and embedding them at a predetermined depth. And a rocking device 47 which swings the seeding arm 31 up and down.

First, the seed hopper 41 will be described with reference to FIGS. 3 to 6.

The seed hopper 41 consists of the inclined supply case 45 of the lower part, and the hopper case 55 detachably mounted by the fixing mechanism 76 on the said supply case 45, The said hopper case The upper end of the cover 46 is axially mounted to the upper and lower openings, the cover 46 is opened, the gel-coated seed 40 is introduced, and the reservoir 46 is stored in the hopper case 55. have.

The supply case 45 is fastened and fixed to the front surface of the stay 58 horizontally installed in the left and right directions by the holder 57, and the left and right approximately center portions of the stay 58 are fixed to the upper part of the support stay 64. The support stay 64 is fixedly installed at the rear end of the transmission case 59 extending from the chain case 14 through left and right connection plates 63 and 63 so that the seed hopper 41 is fixedly supported on the body. It consists of a composition.

Below the supply case 45, the input shaft 75 is axially supported by the attachment frame 85 which protrudes forward from the stay 58, and the one end of the input shaft 75 has a porous plate drive sprocket 68 Is fixedly installed, and a chain 72 is wound between the perforated plate drive sprocket 68 and the intermediate sprocket 66 on the pivot shaft 70 horizontally installed on the connecting plates 63 and 63. The intermediate sprocket 65 is also fixedly installed on the pivot shaft 70, and a chain 71 is wound between the intermediate sprocket 65 and the sprocket 67 axially supported by the transmission case 59.

That is, the driving force from the tractor T can be transmitted to the input shaft 75 through the chain case 14, the transmission case 59 and each sprocket to change the number of teeth of each sprocket or to change the input shaft 75. It consists of a structure that can adjust the appropriate rotation speed.

However, the sprocket 67 may be configured to be fixed to the rotation shaft of the ground wheel.

In addition, a feed shaft 56 is inserted into the center lower portion of the supply case 45, and the upper end of the feed shaft 56 is screwed to the porous plate 77 with a fixing screw 82 through a spring sheet. At the concentric positions around the perforated plate 77, perforated plate holes 77a, 77a,... Larger than the diameter of the gel-coated seed 40 are opened, and a bevel gear 78 is provided at the bottom of the feed shaft 56. Fixed) is engaged with the bevel gear 79 fixedly installed at the end of the input shaft 75, so that the perforated plate 77 can be rotated by the driving force transmitted from the tractor T to the input shaft 75. I'm letting you.

A drop guide 83 is provided on the lower surface of the raised side in front of the supply case 45 so as to guide the gel-coated seed 40 falling from the porous plate 77 into the support hopper 42. .

In addition, the porous plate hole 77a is spaced in a space of about 180 ° on the lower side of the back of the supply case 45 so that the gel-coated seed 40 is not caught between the lower surface of the hopper case 55 and the hole plate hole 77a. The sponge 80 is disposed at a position that does not block, and the coupling protrusion 80a is installed at the outside of the sponge 80, and a cutout 45a is installed at the corresponding position of the supply case 45 to be coupled. So that it can be easily removed.

A seal 81 made of a synthetic resin made of polymer polyethylene or the like is adhered to the sponge 80 so that the gel-coated seed 40 is easily slipped.

In this way, the gel-coated seeds 40 arranged on the porous plate 77 on the lower side of the supply case 45 descending from the lower portion of the hopper case 55 are placed in the porous plate holes 77a one by one. In accordance with the rotation of the porous plate 77, it can be conveyed to the position of the dropping guide 83 and can be dropped into the support hopper 42.

Next, the support hopper 42 is demonstrated with reference to FIG. 3, FIG. 4, and FIG.

The support hopper 42 is comprised from the main body 73 and the guide plate 74 attached to the inner surface, Among these, the main body 73 is a foot-shaped receiving part 73a and the said It consists of the downward pyramid-shaped drop part 73b which communicated with the receiving part 73a lower part. At the upper end of the receiving portion 73a, a receiving opening 73c into which the gel-coated seed 40 dropped from the seed hopper 41 enters is opened, and at the same time, the locking hole 73d is formed at the outer circumferential side of the receiving portion 73a. It is formed, the locking hole (73d) is locked to the rear of the stay 60 is horizontally installed. The stay 60 is fixed to the upper surface of the front end portion of the support frame 61 protruding forward from the support stay 64 by the holder 62, and the support hopper 42 is seeded. Exposed and supported under the hopper 41 is carried out.

On the front and rear sides of the lower portion 73b, the rotating scratching blade 32 or the seed holder 33 is cut in the vertical direction to pass through the slits 73e, and at the same time, the lower portion of the slits 73e The cover part 73f in which the side member of the narrowed part of the lower part was bent so that the soil which protruded from the front might not be blocked is formed.

On the other hand, the guide plate 74 is composed of an upper guide member 74a on the inner surface of the receiving portion 73a and a lower guide member 74b on the inner surface of the dropping portion 73b, and a lower end portion of the lower guide member 74b. Bent to form seed support arms 74c and 74c, the seed support arms 74c and 74c protruding from the left and right toward the slits 73e and at the same time the gap between the seed support arms 74c and 74c. Silver is set to a degree slightly narrower than the diameter of the gel-coated seed 40.

By such a configuration, the gel-coated seeds 40 dropped one by one into the support hopper 42 roll down the respective guide members 74a and 74b when they enter the receiving port 73c, and the seed support arms 74d and 74c. It stops in between, and it is made to isolate | separate and support one by one at this position reliably.

Next, the structure of the seeding arm 31 is demonstrated with reference to FIG. 10, FIG. 11, and FIG.

A scratching blade 32 is fixed to the upper end of the seeding arm 31 by bolts 44 and 44, and the scratching blade 32 is slightly curved upward, and is sandwiched between the seed supporting arms 74c and 74c. The gel coated seed 40 is scratched while descending along the slit 73e.

Then, the push rod 34 is elastically protruded from the distal end of the seeding arm 31 at the lower portion of the scratching edge 32, and the gel coated seed 40 scratched on the distal end of the push rod 34 is formed. The seed holder 33 for receiving and supporting is fixed. The seed holder 33 is a U-shaped left and right holder 33b when viewed from the front fixed to the lower surface of the push rod 34 and a U-shaped front and rear holder 33a when viewed from the side fixed to the upper surface of the push rod 34. ), And to support the gel coated seeds 40 on the front and rear left and right sides, and to fix them with bolts 43 at the same time, so that the shape is appropriate according to the shape and size of the gel coated seeds 40. The seed holder 33 can be easily changed.

Among the front and rear holders 33a, the left and right widths are made narrower than the gap between the slits 73e so that the gel coated seeds 40 can be scratched, and the front and rear holders 33b are all. The height is slightly lower than the rear height so that the gel-coated seed 40 easily enters the seed holder 33 from the front, and the gel-coated seed 40 once inserted is the seed holder 33 even during the descent while the seeding arm 31 rotates forward. I do not pour it out of).

The upper end of the cam lever 36, which is installed to be able to rotate back and forth, is pivotally connected to the base of the push rod 34, and the lower end of the cam lever 36 is connected to the extrusion cam 38. It is contacted and pressurized downward by the spring 39 at the same time. The slide pin 38a protrudes to the side from the center of the said extrusion cam 38, and is inserted in the long hole opened to the side of the seed arm main body 35 in the up-down direction so that a vertical movement is possible, and the extrusion cam ( By the vertical movement of 38, the cam lever 36 rotates, and the seed holder 33 fixed to the tip of the push rod 34 is comprised so that it may protrude outside the seeding arm 31. As shown in FIG.

The drive configuration by the swinging device 47 of such a seeding arm 31 will be described with reference to FIGS. 12 and 13.

A rotary case 84 is fixedly installed on the transmission shaft 86 horizontally arranged behind the transmission case 59, and the phase is changed by a planetary gear mechanism or the like from the outer circumference of the rotary case 84. The side of the support member 90 is fixed to the seeding arm main body 35 so as to protrude laterally, and the seeding arm 31 is fixed to the transmission shaft ( 86) can be rotated without changing the posture.

In addition, the disc-shaped oscillation cam 48 is fixed to the distal end portion of the cam fixing shaft 87 in which the motor shaft 59 is fixed to the rear of the transmission case 59 and is extended laterally. And a cam groove 48a is installed on an approximately circumference of the inner surface of the swing cam 48, and the slide pin 38a is slidably coupled to the cam groove 48a. The lower portion of the cam groove 48a is slightly eccentric in the center direction so that the slide pin 38a rises in the long hole 88.

In this configuration, when the transmission shaft 86 is rotated, the seeding arm 31 revolves around the transmission shaft 86 in a predetermined posture while being guided by the cam groove 48a, and the seeding arm 31 extends near the soil. When lowered, the extrusion cam 38 rises in the long hole 88 to push up the cam lever 36, and the tip of the push rod 34 protrudes to allow the gel-coated seed 40 in the seed holder 33 to enter the soil. I can push it in certainly.

As in the present embodiment, the seeding groove is formed at the specific depth so that seeding can be performed at a more precise depth position.

By the above configuration, the porous plate 77 in the seed hopper 41 is rotated by the driving force from the chain case 14 so that the gel-coated seed 40 falls in the support hopper 42 at a predetermined time, and the seed A seeding arm 31 which is reliably supported by the support arm 74c one by one, at the same time rotates the rotary case 84 at a constant speed by the driving force from the chain case 14, and is provided in the rotary case 84. By this, the supported gel-coated seed 40 is taken into the seed holder 33 with a scratching blade 32, and the tip of the push rod 34 protrudes from the point when the seeding arm 31 is lowered to the soil to coat the gel. The seed 40 is pushed into the soil so that the spherical gel-coated seed 40 can be reliably sown at a predetermined depth at regular intervals without rolling.

In this case, the operating timing of the porous plate 77 and the seeding arm 31 is transferred to the dropping guide 83 position and the gel-coated seed 40 in the porous plate hole 77a falls into the support hopper 42. When the support to the seed support arm 74c is completed, it is necessary to set at least until the seeding arm 31 is rotated once to reach a position where the gel-coated seed can be grasped again, and for this, the porous plate 77 Can be adjusted by a change by the sprocket diameter ratio of the rotational speed of the rotational speed or by a transmission of the rotational speed of the transmission shaft 86 or the like.

Since this invention was comprised as mentioned above, it has the following effects.

That is, in the claim 1, in the direct wave device in which the gel-coated seeds are embedded in the soil of the harrowed faucet, the gel-coated seeds supplied from the seed hopper are separated from the seed hoppers containing a large number of the gel-coated seeds in a specific position. Since the support hopper which fixedly supported the one egg was installed, and the gel-coated seed supported by the said support hopper was hold | broken one by one, and the seeding germination which enables the up-and-down oscillation which is sown at a fixed interval at a predetermined depth was excreted, the seed germination The seeding of each grain, which is advantageous for the sake, can be reliably and precisely performed at a predetermined depth at regular intervals, thereby greatly improving the germination rate and quality of the seeds.

The method of claim 2, wherein a fertilizer and a drug spreading device are provided in parallel with a plurality of seeding devices at the rear of the rotary tillage device, and a plurality of seedlings, fertilizers and chemical spreading are continuously performed. Apart from the seed hopper, a support hopper is provided for separating and supporting the eggs which secured the gel-coated seeds supplied from the seed hopper to a specific position, and the supported gel-coated seeds are held one by one at regular intervals. Since the seeding arm which can be rocked up and down can be excavated, even in the direct wave apparatus which carried out several sets of seeding, fertilization, and chemical | medical dispersal continuously, the seeding which is favorable for seed germination is good at a predetermined depth at a predetermined interval. It can be performed reliably so that the seed germination rate and quality can be greatly improved.

In the seeding arm of Claim 1 or 2, the seeding arm of Claim 1 or 2 is extended so that a push rod may be stretched and protruded from the distal end of a seeding arm main body, and the seed of a gel-coated seed supplied from the said seed hopper can be latched on the upper part of the said push rod front end. Since the holder is fixed, the gel-coated seeds can be reliably scratched one by one for sowing.

In the seed hopper of Claim 1 or 2, the supply case provided with the shutter function was provided in the seed hopper below, At the same time, the shutter of the said supply case was opened, and one gel-coated seed falls into a support hopper, When the support is completed, the seeding arm is set to hold the gel-covered seed, then descend to finish the seeding and move to the position where the gel-coated seed can be grasped again, so that the seeding is not missed and the seeding is accurately spaced at regular intervals. This can prevent a decrease in yield due to unseed.

Claims (4)

In a direct wave device in which gel-coated seeds are embedded in a harrowed faucet soil, a gel coating supplied from the seed hopper, apart from a seed hopper that accommodates a large number of gel-coated seeds. The seeding device which installs the support hopper which isolates and supports the seed which secured the seed to the specific position, and installed the seeding arm which can swing up and down which grasps the said gel-coated seed one by one, and sows at a predetermined interval so that the seeding device may be installed. Straight wave device, characterized in that provided. A gel-coated seed in a straight wave device in which a fertilizer device and a chemical | medical agent spreading device are provided in parallel with a plurality of seeding apparatuses in the rear part of a rotary tillage device, and a seeding, fertilization, and chemical | medical agent spreading of several tanks are performed continuously. Apart from the seed hopper which accommodates a large number of seeds, a support hopper is provided for separating and supporting the eggs which ensured the gel-coated seeds supplied from the seed hopper in a specific position, and each of the supported gel-coated seeds is held one by one for a predetermined depth. And a seeding device in which a seeding arm capable of swinging up and down sowing at a predetermined interval is provided. The seeding arm according to claim 1 or 2, wherein the seeding arm has a push rod extending from the distal end of the seeding arm main body so as to be retractable, and the gel-coated seed supplied from the seed hopper can be held on the pushrod front end. Straight wave device, characterized in that the seed holder is fixed. The seed hopper according to claim 1, wherein in the seed hopper, a supply case having a shutter function is provided under the seed hopper, and a shutter of the supply case is opened so that one gel-coated seed is introduced into the support hopper. A direct wave device, wherein the dropping time is set so that the seeding arm falls down after gripping the gel-coated seed, and sowing is completed, so that the seeding arm can move to a position where the gripping of the gel-coated seed is possible again.