JP6755581B2 - Seeding delivery roll of seedling seedling machine - Google Patents

Description

In the present invention, in a seedling sowing machine for sowing paddy rice seeds as seeds in a rice transplanter seedling raising box, the seed hopper seeds are placed on the soil of the seedling raising box in a fixed amount accurately and in small amounts. However, it relates to the configuration of the feeding recess of the seeding feeding roll to enable seeding.

In a conventional sowing machine for raising seedlings of paddy rice, a large number of horizontal straight feeding recesses parallel to the axis of the sowing feeding roll are arranged on the outer peripheral surface of the sowing roll erected between the left and right frame side plates at regular intervals. Seeding devices are known.
In addition, in the invention pending by the same applicant, there is an invention in which a large number of feeding recesses are formed in a screw groove shape on the outer peripheral surface of the seeding feeding roll, which is wound around the entire circumference.
Further, in another invention of the same applicant, a seeding feeding roll capable of arranging feeding recesses in a horizontal straight line or in a staggered pattern by overlapping combinations of a large number of divided seeding feeding rolls has been filed.

JP-A-2009-95250

In a seedling raising machine, when a small amount of 60 to 80 grams of paddy is sown with a sowing feeding roll in which the feeding recesses are arranged in a horizontal straight line parallel to the axis of the roll drive shaft, after sowing on the soil surface of the seedling box. In the arrangement state of the seed paddy, a streak parallel to the concave portion in a horizontal straight line of the sowing feeding roll was completed, and the distance between the streaks was wide, and as a result, the sowing interval was 18 mm or more.
In this way, by opening the sowing interval to 18 mm or more in the case of small-scale seeding, seedlings grow in the seedling raising box, and in the subsequent stage of planting in the field with the rice transplanter, the planting claws of the rice transplanter are used. In the mat seedlings that passed through, there were places where the seedlings were not scraped off because there were no seedlings, which caused a stock shortage at the time of planting.

The adjustment range of the vertical feed pitch of seedlings of a normal rice transplanter is 16 to 18 mm, and the number of seeds fed from each row of feeding recesses in a horizontal straight line can be reduced to a small number with an accurate number. If possible, the spacing between the feeding recesses of the seeding feeding roll can be narrowed, and the sowing interval can be narrowed.
However, in the feeding recesses of the sowing feeding rolls currently provided, the number of seeds to be fed into the feeding recesses cannot be reduced, so that the number of seeds fed per row cannot be reduced. It was not possible to narrow the spacing between the feeding recesses to 16 to 18 mm or less, which is the adjustment range of the vertical feed pitch of seedlings.
Therefore, by narrowing the pitch interval of the feeding recesses of the sowing feeding roll and reducing the number of seeds to be sown, it is not possible to deal with the above-mentioned problems of the prior art.

Further, as shown in FIG. 18, in the conventional sowing and feeding roll in which the feeding recesses are arranged in a horizontal straight line, the seeds are not lined up in a state where the seeds are aligned in the feeding recesses, and the seeds are fitted in a state where the seeds are overlapped with each other. In some cases, the seeds were swept out by a rotating brush in the subsequent stage, which was rotated in contact with the outer periphery of the sowing and feeding roll, and as a result, a state of seed loss occurred in the feeding recess.

Further, in the case of the prior application of the same applicant, in the case of the configuration in which the feeding recesses are arranged so as to be inclined in one direction in a screw shape on the outer circumference of the seeding feeding roll, impurities such as stones and dust are formed in the screw-shaped groove. The effect was biased to one side, which could cause uneven wear on the side where the sowing feed roll and the rotating brush were biased.

In addition, the seed paddy tends to accumulate diagonally downward, which is one side of the screw-shaped groove in the inclined direction. To avoid this, a large amount of seed paddy is accumulated on the sowing feeding roll, but as a result, the rotating brush There was a situation that the load related to the above was increased and the number of seeds lined up in a row increased, so that the sowing interval had to be widened.
Further, when the divided sowing and feeding rolls are combined in a staggered arrangement, a small amount of seeds can be scattered, but there is a problem that long seeds and the like are easily clogged in the feeding recess.

Therefore, the present invention solves these problems, configures the seeds to be aligned in the feeding recesses, reduces the number of seeds to be fitted in the feeding recesses, and reduces the spacing between the feeding recesses on the outer periphery of the seeding feeding roll. Seeding of a seedling sowing machine that enables small-scale seeding by narrowing the pitch and narrowing or eliminating the spacing between the feeding recesses and the seed paddy streaks formed between the feeding recesses on the surface of the seedling raising box. The task is to provide a payout roll.

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

In claim 1, in the cylindrical sowing and feeding roll of the seedling raising sowing machine, the groove of the feeding recess to be bored in the sowing and feeding roll is drilled in a screw shape so as to wind around the outer circumference of the sowing and feeding roll. The screw-shaped groove is formed from the left and right ends of the sowing feeding roll to the center position of the left and right width of the sowing feeding roll, and is symmetrically opposite to the screw shape from the left and right other ends. The formed grooves on the opposite side are bored to the center positions of the left and right widths, and the grooves of one feeding recess of the seeding feeding roll are arranged as a V-shaped groove.

In claim 2, the direction of the V-shaped arrangement groove formed by the feeding recess is configured so that the V-shaped tip of the V-shaped arrangement groove is in front of the rotation direction of the sowing and feeding roll. It was done.

In claim 3, the sowing and feeding roll has a structure in which one cylinder is divided into left and right, and screw-shaped grooves of the feeding recess are processed so as to be symmetrical with each other, and then the left and right cylinders. By adhesively fixing the seeds, one seeding and feeding roll is formed, and the feeding recess is formed in a V-shaped arrangement groove.

In claim 4, the roll groove angle inclined with respect to the direction of the bus bar of the outer circumference of the seeding feeding roll in the screw-shaped groove forming the feeding recess is set to 20 to 35 °.

In claim 5, the cross-sectional shape of the screw-shaped groove of the feeding recess in the direction orthogonal to the axis of the seeding feeding roll has a depth increased by about 10% of the average paddy thickness, and the seeding feeding roll The angle of the front corner with respect to the direction of rotation is a chamfer angle of 30 ° or more.

In claim 6, a scraping groove into which a groove scraping fork is fitted is formed on the outer circumference of the seeding feeding roll in the circumferential direction of the outer circumference of the seeding feeding roll.

In claim 7, the outer circumference of the sowing feeding roll is between the shutter bottom plate forming the bottom of the shutter and the scraping brush that rotates in contact with the outer circumference of the sowing feeding roll, in the axial direction of the sowing feeding roll. The intermediate gates are arranged in parallel directions, and the intermediate gates are made of an elastic material so as to sweep off the overlapping seeds and at the same time push the seeds into the groove.

In claim 8, the number of screw-shaped grooves in the feeding recess on the outer circumference of the seeding feeding roll is 40 to 70.

The effects of the present invention are as follows.
By providing a screw groove in the feeding recess of the sowing feeding roll and setting the roll angle α of the screw groove, the seed paddy can easily flow downward (outside) along the groove, and as a result, the seed paddy is lined up in the screw groove. I was able to get the effect of lining up.

In addition, the intermediate gate and the V-shaped arrangement groove allow the seed paddy to be aligned in the feeding recess without any gap, and as a result, the sprinkling accuracy is improved.
In addition, the seed paddy is configured to be aligned in the feeding recess, the number of seed padding fitted in the feeding recess is reduced, and the interval (pitch) of the feeding recess on the outer circumference of the sowing feeding roll is narrowed, thereby raising the seedling box. The present invention relates to a seeding and feeding roll of a seedling sowing machine capable of sowing a small amount of seeds by narrowing or eliminating the interval between the seeding recesses formed on the surface of the seedling and the seeding and paddy streaks formed between the feeding recesses.
As a result, the seedlings are sown in the nursery box in a nearly uniform state, so that the number of stock shortages is reduced when planting with a rice transplanter.
Further, by providing the intermediate gate, the lifting of the seed paddy is reduced, and the load of the scraping brush is reduced.

A perspective view of a seedling seeding plant in which a seedling seeding machine is arranged. Right side view of the seedling seeding machine. Left side view of the seedling seeding machine. Front view of seedling seedling machine. The side view which shows the arrangement of the sowing feeding roll, the scraping brush, the shutter, and the groove scraping fork in the seedling seedling sowing machine. A side view showing the arrangement of the sowing feeding roll, the scraping brush, the shutter, and the intermediate gate. A side view showing the shape of a side guide plate arranged on the side surface of a shutter inside a seedling seedling sowing machine. Front view of the sowing feeding roll of the seedling raising machine. A side view of the sowing and feeding roll as seen from the side of the roll side plate. Front view of the left sowing feeding roll of the sowing feeding roll of the seedling raising machine. The front view of the right sowing delivery roll of the sowing delivery roll of the seedling raising seeding machine of the present invention. Side view of the left sowing feeding roll. A side sectional view in a direction orthogonal to the axial direction of the sowing roll of the feeding recess. A front sectional view in a direction parallel to the axial direction of the seeding feeding roll at the end of the feeding recess. (A) A drawing showing the relationship between the roll groove angle α, the roll groove length, and the number of insertable grains of the feeding recess formed in the seeding feeding roll of the seedling raising sowing machine. (B) The figure which shows the V-shaped feeding recess, the roll groove angle α, and the arrangement number of seed paddy. The drawing which shows the relationship between the roll groove angle of the feeding recess formed in the sowing feeding roll of a seedling raising machine, the roll groove length, and the sowing pitch P. (A) A side view of a sowing feeding roll provided with a V-shaped feeding recess in a state where the seeds are aligned and entered into the feeding recess. (B) The plan view which shows the arrangement state of the seed paddy which was sown in the sowing feeding roll provided with the V-shaped feeding recess. (A) A side view of a state in which seed paddy is contained in a feeding recess in a sowing feeding roll provided with a conventional horizontal straight feeding recess. (B) A side view showing a state in which seed paddy in a conventional horizontal linear type feeding recess overlaps in the feeding recess. (C) The plan view which shows the arrangement state of the seed paddy which was also sown in the conventional horizontal straight type feeding recess. A drawing showing the average size of seed paddy in seeds.

In FIG. 1, a configuration of a seedling box seeding plant in which a seedling raising seeding machine B is arranged as a part of the apparatus will be described.
A conveyor R on which a conveyor roller 5 for transporting a nursery box (not shown) is erected is arranged linearly. On the transport conveyor R, the soil filling device A, the seedling seeding sowing machine B, and the soil covering device C are arranged in order along the transport direction F of the seedling raising box.
A drive device H for the conveyor R is arranged in front of the soil filling device A, and an irrigation device D for irrigating the surface of the nursery box into which the soil is charged is arranged after the soil filling device A. ..

A seedling raising seeding machine B is arranged after the irrigation device D, and a soil covering device C is arranged after the seedling raising seeding machine B.
Then, the seedling raising box is transported along the transporting direction F, and seed paddy is sown in the seedling raising box.
The present invention relates to the structure of a sowing and feeding roll K of a seedling raising seeding machine B for sowing seed paddy as seeds on a soil surface put into a seedling raising box by a soil filling device A.

In FIGS. 2, 3, 4, 5, and 6, the arrangement of the sowing and feeding roll K, the scraping brush 33, and the shutter 40 in the seedling raising seeding machine B will be described.
In the seedling raising seeding machine B, a sowing and feeding roll drive shaft 1 and an intermediate gate 9 are erected between the left and right side plates 4L and 4R, and the sowing and feeding roll K is driven by the sowing and feeding roll driving shaft 1. A chain 42 that rotates the scraping brush drive shaft 6 is wound to drive the scraping brush 33 at a rotation speed synchronized with the rotation of the seeding and feeding roll K.

A hopper 18 for throwing seeds, which are seeds, is arranged in the upper part between the side plates 4L and 4R in the seedling raising sowing machine B, and a shutter 40 and a shutter bottom plate 41 are provided in the lower part of the hopper 18. Has been done.
By adjusting the opening degree of the shutter 40 with the shutter adjusting screw 39, the amount of the seed paddy seeds that fall onto the sowing and feeding roll K can be adjusted.

Further, the side guide plate 8 shown in FIG. 7 is fixed inside between the left and right side plates 4L and 4R in order to guide the seed paddy to smoothly fall from the hopper 18 in the direction of the sowing feeding roll K. There is.
The side surface guide plate 8 is formed in a shape along the outer circumference of the seeding feeding roll K between the shutter bottom plate 41 and the scraping brush 33.
The side guide plate 8 prevents the seed paddy between the shutter bottom plate 41 and the shutter 40 at the lower part of the hopper 18 from being pressed by entering between the side plates 4L / 4R and the roll side plate 11 of the sowing feeding roll K and being damaged. Therefore, the seed paddy is guided in the outer peripheral direction of the sowing and feeding roll K.

As shown in FIG. 5, a seed guide device 35 that prevents the seed paddy from falling and guides it downward is contacted to the scraping brush 33 of the sowing feeding roll K at the rear stage in the transport direction.
Further, in the rear stage of the seed guide device 35, groove scraping forks 2 fitted into the scraping grooves 7 provided on the outer periphery of the sowing feeding roll K shown in FIG. 4 are continuous by the number of scraping grooves 7. It is configured and fixed.

Further, as shown in FIG. 6, in order to improve the alignment effect of the seed paddy, the position between the shutter bottom plate 41 and the scraping brush 33 of the sowing feeding roll K having the V-shaped feeding recess 3 bored. An intermediate gate 9 is arranged in parallel with the sowing and feeding roll drive shaft 1.
The intermediate gate 9 is an elastic body composed of a rubber plate or a brush arranged in parallel with the sowing delivery roll drive shaft 1 of the sowing delivery roll K, and is angled in a direction to escape by rotation of the sowing delivery roll K. The urging spring 10 shown in FIG. 2 is configured to press-contact in the direction of the sowing and feeding roll K.

The intermediate gate 9 urges the seed paddy so as not to overlap in the feeding recess 3. In addition to being urged by the urging spring 10, the tip of the intermediate gate 9 itself is formed of a rubber plate, a brush, or the like to elastically urge the sowing and feeding roll K toward the feeding recess 3.

8 to 14, the shape of the feeding recess 3 formed in the seeding feeding roll K will be described.
As an example, the cylindrical seeding and feeding roll K has a groove of the feeding recess 3 on the outer periphery of the resin material in a screw shape, and is located at the center position from one end of the left seeding and feeding roll K, which is one of the left and right sides of the seeding and feeding roll K. Is machined up to. Then, a V-shaped groove arrangement is formed from the other end of the right seeding feeding roll KR on the opposite side of the left and right by machining a screw-shaped groove symmetrical to this to the center position on the left and right. .. In this embodiment, the feeding recess 3 is formed by machining, but the feeding recess 3 may be formed by molding during resin processing.

In the sowing and feeding roll K of the seedling raising machine, the groove of the feeding recess 3 is bored in a screw shape having a roll groove angle α so as to wind around the outer circumference of the cylindrical sowing and feeding roll K. The groove is formed from one end of the left and right seeding and feeding rolls KL of the seeding and feeding roll K to the center position of the left and right width of the seeding and feeding roll K, and from the other end of the left and right right seeding and feeding rolls KR. Also, by drilling a groove having the same roll groove angle α on the opposite side symmetrically to this to the center position, the grooves of the feeding recess 3 of one seeding feeding roll K are arranged in a V shape. It was formed by sowing.
The material of the sowing and feeding roll K can be made of a material other than the resin material.

The direction of the V-shaped arrangement groove formed by the feeding recess 3 is such that the V-shaped tip of the V-shaped arrangement groove is in front of the rotation direction of the sowing and feeding roll K.
In this way, the flow of the seed paddy and the movement of the screw groove are synchronized by configuring the V-shaped tip of the V-shaped arrangement groove to be in front of the rotation direction with respect to the rotation direction of the sowing and feeding roll K. In this state, the seed paddy is fitted into the screw-shaped groove in order one by one, and is aligned in the screw-shaped groove as shown in FIGS. 15 and 16.
Further, since the V-shaped arrangement groove is formed, the seed paddy flows from the center to the left and right end portions (outer lower side), and it is possible to prevent the seed paddy from staying at one of the left and right end portions of the feeding recess 3. ..
This makes it possible to accurately drop the minimum number of seeds on the surface of the nursery box.

Further, the seeding feeding roll K divides one cylinder into two left and right left seeding feeding rolls KL and a right seeding feeding roll KR, and screw-shaped groove of the feeding recess 3 so as to be symmetrical on the left and right. Is processed, and then the left and right cylinders are adhesively fixed to form one sowing and feeding roll K, so that the feeding recess 3 is V-shaped.
Then, the left and right ends of one sowing and feeding roll K are covered with roll side plates 11R and 11L so as to close the cylinder portion.
The number of grooves in one circumference is preferably 40 to 70, but in the embodiment, it is 60. The optimum number is 60.

The optimum value of the roll groove angle α (the angle oblique to the direction of the bus on the outer circumference of the roll) of the screw-shaped groove is calculated under the following conditions.
Weight of germinated paddy; 33.6 g / 1000 grains Average dimensions of germinated paddy; length 7 mm, thickness 3.5 mm (disclosed in FIG. 19)
Nursery box dimensions; length 580 mm x width 280 mm
Amount of seeding in seedling raising box; 60 g / box Under the above conditions, 1785 grains [60 ÷ (33.6 / 1000)] are sown per seedling raising box.

In FIGS. 15 and 16,
Groove angle of the feeding recess of the seeding feeding roll; α
Length of one side of V-shaped array groove; X
Then, assuming that the seedlings are sown in the seedling raising box with the V-shaped arrangement, the number of seeds Z arranged in one groove of the V-shaped arrangement is as shown in FIGS. 15 and 16.
That is, by increasing the roll groove angle α of the feeding recess 3 of the screw groove of the seed feeding roll K in order from 0 ° to 45 °, the length of one side of the V-shaped arrangement groove; X is 140 mm. From to 198 mm, it gradually becomes longer. Then, the number of insertable grains Z also gradually increases from 40 grains to 56 grains.

Further, in FIG. 16, the relationship between the roll groove angle α, the number of insertable grains Z, and the sowing pitch P is shown.
As the roll groove angle α increases, the number of grains Z that can be fitted into one screw-shaped groove also increases.
In the case of a V-shaped arrangement groove, the number of insertable grains Z of the screw-shaped groove in one row increases. Therefore, when the required seeding pitch P is calculated from the required number of insertable grains Z, the seeding pitch P is Can be made larger.

The general number of seedlings picked by a rice transplanter is 18 times for vertical feed and 36 times for horizontal feed for mat seedlings in one box of nursery boxes. If shown by the feed pitch of mat seedlings, the horizontal feed pitch NY Is 15.5 mm (NJ = 280 ÷ 18 times), and the vertical feed pitch NT is 16 mm (NT = 580 ÷ 36 times).
As a result, if the sowing pitch P is not shorter than the vertical feed pitch NT of 16 mm, a place without seedlings will occur, and there is a possibility that a stock shortage will occur.
From FIG. 16, it is desirable that the roll groove angle α of the screw groove is 35 ° or less in order to make the vertical feed pitch NT shorter than 16 mm.

On the other hand, when the roll angle α is parallel to the sowing and feeding roll drive shaft 1 of the feeding recess 3 as in the conventional technique, it is 0 because it is a straight line. Therefore, even assuming a V-shaped arrangement, the number of seeds lined up in a row is 40.
However, in reality, in the case of the conventional left-right straight feeding recess, about 55 seed paddy grains are lined up. This is because the seed paddy is lined up in an overlapping manner, and it is found that the seed paddy is overlapped and fitted into the feeding recess until the roll angle α is 20 ° or more on a trial basis. There is. By setting the roll angle α to an angle of 20 ° or more, the seed paddy can easily flow downward, and as a result, lining up in a row produces the action and effect of the present invention.

Therefore, the optimum roll groove angle α is 20 to 35 °. This time, a seeding feeding roll was prototyped at this intermediate value of 28 °, and the result of the seeding test is shown in FIG.
From the above results, when the roll groove angle α is set to 28 °, the surface area of the sowing surface of the seedling raising box is formed by the lengths of the vertical feed and the horizontal feed of the mat seedlings (15.5 × 16 mm). It was demonstrated that two or more seeds of paddy were always sown in the squares and could be sown uniformly. Therefore, the optimum roll groove angle α is set to 28 °.
As a result, when scraping with the planting claws of the rice transplanter at one time, there are two seedlings, which are planted in the field scene, and no stock shortage occurs.

As shown in FIG. 13, the cross-sectional shape of the feeding recess 3 has a depth of 3.8 ± 0.05 mm, which is about 10% higher than the average seed thickness of 3 mm, and a width of 6.1 mm. Further, with respect to the rotation direction of the seeding feeding roll at the front portion of the V-shaped arrangement groove of the feeding recess 3, the corner portion on the inlet side has a configuration of a straight feeding recess along the conventional seeding feeding roll drive shaft 1. The chamfering angle is 45 °, but in the case of a V-shaped arrangement groove, if it is set to 45 ° as in the conventional case, the seed paddy can easily escape from the feeding recess. In order to solve this problem, the chamfer is set to 30 °. On the contrary, when the chamfer is 30 ° or less, it becomes difficult for the seed paddy to enter the feeding recess.

Further, as shown in FIG. 14, in the feeding recess 3, the depth of the groove is gradually reduced at the left and right ends of the screw-shaped groove, and the feeding recess 3 is provided at both left and right ends. It is pierced so that it disappears. A scraping groove 7 into which the groove scraping fork 2 which is a foreign matter feeding fork is fitted is bored in the circumferential direction of the outer circumference of the seeding feeding roll K.

Further, an intermediate gate 9 is provided at an angle of 55 ° between the seeding feeding roll and the rotating brush. The intermediate gate 9 has a structure in which an elastic material such as a rubber plate or a brush is supported by a support member and pressed against the sowing and feeding roll K, and when the overlapping seed paddy in the feeding recess 3 is swept away. At the same time, it plays the role of pushing the seed paddy into the groove so as to align it in a row. The intermediate gate 9 is mounted in the horizontal direction, and the mounting angle of the intermediate gate 9 is adjustable.

FIG. 18 shows the relationship between the conventional sowing and feeding roll K'and the alignment of the seed paddy. FIG. 18A shows a state in which the seed paddy has entered the feeding recess in the sowing feeding roll K'provided with the conventional horizontal linear feeding recess 3'. FIG. 18B shows a state in which the seed paddy is overlapped in the feeding recess in the conventional horizontal straight feeding recess 3'. FIG. 18C shows the arrangement state of the seed paddy sown in the conventional horizontal linear type feeding recess 3'.

As described above, conventionally, the seed paddy is fitted so as to overlap with the feeding recess formed in a straight line in parallel with the sowing feeding roll drive shaft 1, and when this is scraped off by the scraping brush 33, they overlap. There was a problem that two grains came out of the feeding recess.
Further, in the case of a feeding recess that is in a straight line in parallel with the conventional sowing feeding roll drive shaft 1, a large number of overlapping seeds are contained inside, so the sowing pitch P needs to be 18 mm or more, and the mat in the rice transplanter. There was a problem that even one seed paddy did not fall into the square (15.5 x 16 mm), which is the area of vertical and horizontal feeding of seedlings.

In the present invention, as shown in FIG. 17, it is improved. FIG. 17A shows a state in which the sowing and feeding roll K provided with the V-shaped feeding recess 3 enters the feeding recess 3 with the seed paddy aligned. FIG. 17B shows the arrangement state of the seed paddy seeded in the seeding feeding roll K provided with the V-shaped feeding recess 3.

In the sowing and feeding roll K of the seedling raising machine, the groove of the feeding recess 3 to be bored in the cylindrical seeding and feeding roll K is drilled in a screw shape so as to wind around the outer circumference of the seeding and feeding roll K. The groove is formed from the left and right ends of the seeding and feeding roll K to the center position of the left and right width of the seeding and feeding roll K, and is symmetrically opposite to the screw shape from the other ends of the seeding and feeding roll K. By drilling the groove on the opposite side configured in the above to the center position and arranging the groove of one feeding recess 3 of the seeding feeding roll K as a V-shaped groove, this V-shaped feeding recess is formed. Seed paddy is aligned and fitted into 3 one by one.
This is because the seed paddy flows along the V-shaped feeding recess 3 and the V-shaped feeding recess 3 moves along the flow, so that the seed paddy moves in the direction of aligning in the longitudinal direction. This is because it fits into the inside of the character-shaped feeding recess 3 in order.
Therefore, even when scraping with the scraping brush 33, the overlapping seed paddy is no longer scraped out.

In this way, the sowing pitch P is narrower than the conventional 18 mm by setting the roll groove angle α as the V-shaped feeding recess 3 to 20 to 35 ° with respect to the direction of the bus bar on the outer circumference of the seeding feeding roll K15. It is possible to set it to 9.9 mm, and it is possible to obtain the result that at least two grains fall into the square of (15.5 × 16 mm), which is the area of vertical and horizontal feeding of mat seedlings. It was.
This also made it possible to sow a small amount of seed paddy, and even in the case of a small amount of sowing, it was possible to eliminate stock shortages when planting with a rice transplanter. The optimum roll groove angle α is 28 °.

Further, the direction of the V-shaped arrangement groove formed by the feeding recess 3 is configured so that the V-shaped tip of the V-shaped arrangement groove is in front of the rotation direction with respect to the rotation direction of the seeding delivery roll K. As a result, the seed paddy flows in synchronization with the V-shaped feeding recess 3, and is in a state of being aligned in the longitudinal direction, and can be dropped into the feeding recess 3.

Further, as shown in FIGS. 10 and 11, the sowing and feeding roll K has a structure in which one cylinder is divided into two left and right. The screw-shaped groove of the feeding recess 3 is machined symmetrically in each of the two divided cylinders to form a left seeding feeding roll KL and a right seeding feeding roll KR, and then a left seeding feeding roll KL. And the right seeding and feeding roll KR are fitted and fixed by adhesion to form one sowing and feeding roll K, and the feeding recess 3 is formed in a V shape. Therefore, although the feeding recess 3 of the seeding and feeding roll K is processed with a screw-shaped groove, the seeding and feeding roll K can be manufactured by low-cost processing without using an expensive processing device. It was.

Further, the cross-sectional shape of the screw-shaped groove of the feeding recess 3 in the direction orthogonal to the axis of the sowing feeding roll K is a V-shape because the depth is increased by about 10% from the average seed paddy thickness. It has become possible to maintain a state in which the seed paddy is aligned and fitted one by one in the screw-shaped groove of the arrangement groove.
Further, unlike the case of the linear feeding recess 3 along the conventional sowing feeding roll drive shaft 1, it is no longer possible to fit two or more seeds in a state of being overlapped.
Further, since the angle of the front corner with respect to the rotation direction of the sowing and feeding roll is set to a chamfer angle of 30 ° or more, the seed paddy easily enters the feeding recess 3 and is easily scraped off after entering. It was possible to make the feeding recess 3 which is not possible.

Further, on the outer circumference of the seeding and feeding roll K, between the shutter bottom plate 41 forming the bottom of the shutter 40 and the scraping brush 33 that rotates in contact with the outer circumference of the seeding and feeding roll K, the axial center of the seeding and feeding roll K. Since the intermediate gate 9 is arranged in a direction parallel to the direction, the intermediate gate 9 is made of an elastic material, and the seed paddy is swept away and at the same time the seed paddy is pushed into the groove, a V-shaped feeding recess is provided. The seed paddy fitted in 3 can be dropped at the lower part of the sowing feeding roll K in an aligned state without scraping off the seed paddy more than necessary.

Further, by drilling a scraping groove 7 for the groove scraping fork 2 along the outer circumference of the seeding feeding roll K separately from the feeding recess 3, the seeding groove remains in the feeding recess 3 and is sown. The seed paddy that did not fall at the lower part of the feeding roll K could be forcibly dropped by the groove scraping fork 2. The scraping groove 7 at the connection portion between the left seeding feeding roll KL and the right seeding feeding roll KR of the seeding feeding roll K is formed, for example, by setting the dimensions so that the scraping groove 7 is formed when fitted. Has been done.

A Soil filling device B Seeding machine for raising seedlings C Soil covering device D Irrigation device F Seeding box transport direction K Seeding feed roll KL Left seeding feed roll KR Right seeding feed roll Z Number of grains that can be inserted P Seeding pitch H Drive device α Roll groove angle X Roll groove length 1 Sowing feeding roll drive shaft 2 Groove scraping fork 3 Feeding recess 4L / 4R side plate 5 Conveying roller 6 Scraping brush drive shaft 7 Scraping groove 8 Side guide plate 9 Intermediate gate 10 Bias spring 11 Roll side plate 18 Hopper 33 Scraping brush 39 Shutter adjustment screw 40 Shutter 41 Shutter bottom plate

Claims (8)

In the cylindrical sowing and feeding roll of the seedling seedling machine,
The groove of the feeding recess to be drilled in the seeding feeding roll is drilled in a screw shape so as to wind around the outer circumference of the seeding feeding roll.
The screw-shaped groove is formed from the left and right ends of the sowing feeding roll to the center position of the left and right width of the sowing feeding roll.
From the other ends on the left and right, a groove on the opposite side, which is symmetrically formed in a screw shape, is drilled to the center position of the left and right widths.
A sowing and feeding roll of a seedling raising sowing machine, characterized in that the groove of one feeding recess of the sowing and feeding roll is arranged as a V-shaped groove. In the sowing feeding roll of the seedling raising seeding machine according to claim 1,
The direction of the V-shaped arrangement groove formed by the feeding recess is characterized in that the V-shaped tip of the V-shaped arrangement groove is in front of the rotation direction of the sowing and feeding roll. Seeding and feeding roll of a seedling seeding machine. In the sowing feeding roll of the seedling raising seeding machine according to claim 1,
The seeding and feeding roll has a structure in which one cylinder is divided into left and right, and screw-shaped grooves of the feeding recess are processed so as to be symmetrical with each other, and then the left and right cylinders are adhesively fixed. A sowing and feeding roll of a seedling raising sowing machine, which comprises one sowing and feeding roll and has a feeding recess formed in a V-shaped arrangement groove. In the sowing feeding roll of the seedling raising seeding machine according to claim 1,
The sowing and feeding roll of the seedling raising sowing machine is characterized in that the roll groove angle inclined with respect to the direction of the bus bar of the outer circumference of the sowing and feeding roll in the screw-shaped groove constituting the feeding recess is 20 to 35 °. .. In the sowing feeding roll of the seedling raising seeding machine according to claim 1,
The cross-sectional shape of the screw-shaped groove of the feeding recess in the direction orthogonal to the axis of the sowing feeding roll is such that the depth is increased by about 10% of the average seed paddy thickness.
The sowing and feeding roll of the seedling raising sowing machine is characterized in that the angle of the front corner with respect to the rotation direction of the sowing and feeding roll is a chamfer angle of 30 ° or more. In the sowing feeding roll of the seedling raising seeding machine according to claim 1,
A seeding and feeding roll of a seedling raising machine, characterized in that a scraping groove into which a groove scraping fork is fitted is formed on the outer circumference of the sowing and feeding roll in the circumferential direction of the outer circumference of the sowing and feeding roll. In the sowing feeding roll of the seedling raising seeding machine according to claim 1,
An intermediate gate between the shutter bottom plate forming the bottom of the shutter and the scraping brush that rotates in contact with the outer circumference of the seeding feed roll in a direction parallel to the axial direction of the seeding feed roll. Place and
The intermediate gate is a sowing and feeding roll of a seedling raising machine, which is composed of an elastic material and has a structure in which the overlapping seeds are swept away and at the same time the seeds are pushed into the groove. In the sowing feeding roll of the seedling raising seeding machine according to claim 1,
The sowing and feeding roll of the seedling raising sowing machine is characterized in that the number of screw-shaped grooves in the feeding recess on the outer circumference of the sowing and feeding roll is 40 to 70.