JP2018038376A - Seedling feed roll of seeder for raising seedling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seedling feed roll of a seeder for raising seedling which improves a degree of accuracy of seedling and enables planting of a uniform small amount.SOLUTION: A strip groove of a feeding recessed part 3 bored in a seedling feed roll K is bored in a screw shape to wind around an outer periphery of the seedling feed roll K. The strip groove of a screw strip is bored from one of right and left end parts of the seedling feed roll K to a central position of a lateral width of the seedling feed roll K, and a strip groove, configured to be symmetric and to form an opposite screw shape, on an opposite side is bored from the other one of the right and left end parts to the central position so that the strip groove of one feeding recessed part 3 of the seedling feed roll K is arranged as a V-shaped groove.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a seedling seeder for seeding paddy rice seed pods as seeds in a rice seedling nursery box, and the seed hopper seed pods are placed on the soil of the seedling box accurately and in small amounts. However, it is related with the structure of the feeding recessed part of the sowing | feeding feeding roll for enabling sowing.

In a conventional rice seedling seeding machine, a large number of laterally straight feeding recesses are arranged on the outer peripheral surface of the sowing roll laid between the left and right frame side plates at a constant interval in parallel with the axis of the sowing feeding roll. Sowing devices are known.
In addition, in the invention pending by the same applicant, there are a plurality of feeding recesses formed in the shape of screw grooves wound around the outer circumference of the seeding feeding roll over the entire circumference.
In another invention of the same applicant, there has been applied for a seeding and feeding roll in which feeding recesses can be arranged in a horizontal straight line or a staggered pattern by overlapping combinations of a plurality of divided seeding and feeding rolls.

JP 2009-95250 A

After seeding on the soil surface of the seedling box when a small amount of seeds of 60 to 80 grams is seeded with a seeding feeding roll in which the feeding recesses are arranged in a horizontal line in parallel with the axis of the roll drive shaft in the seedling sowing machine In the arrangement state of the seed pods, streaks parallel to the horizontal straight recesses of the sowing roll were completed, and the spacing between the streaks was wide, resulting in a sowing interval of 18 mm or more.
Thus, in the case of a small amount of seeding, the seeding interval is increased to 18 mm or more, so that seedlings grow in the seedling box and are planted in the field by the rice transplanter at the subsequent stage. In the mat seedlings that passed, there were no seedlings, and there was a place where the seedlings were not scraped off.

The adjustment range of the vertical feed pitch of the seedlings of a normal rice transplanter is 16 to 18 mm, and the number of seed pods fed out from one row of feeding recesses in a horizontal straight line can be reduced to a small number with a precise number of grains. If possible, the interval between the feeding recesses of the sowing feeding roll can be reduced, and the sowing interval can be reduced.
However, in the feeding recess of the sowing roll provided at present, since the number of seed pods fitted into the feeding recess cannot be reduced, the number of seed pods fed out per row cannot be reduced, The spacing between the feeding recesses could not be reduced to 16 to 18 mm or less, which is the adjustment range of the vertical feed pitch of the seedlings.
Therefore, by narrowing the pitch interval of the feeding recesses of the sowing and feeding roll and reducing the number of sowing seeds, it has not been possible to cope with the above-described problems of the prior art.

  In addition, as shown in FIG. 18, in the sowing and feeding roll in which the conventional feeding recesses are arranged in a horizontal line, the seed pods are not aligned in the feeding recesses, but the seed potatoes are inserted and overlapped. In some cases, the seeds are swept out by a subsequent rotating brush rotating in contact with the outer periphery of the seeding and feeding roll, and as a result, there are many cases in which a seed dropout state occurs in the feeding recess.

  In addition, in the case of a configuration in which the feeding recesses are arranged in a screw shape on the outer periphery of the sowing feeding roll, which is a prior application of the same applicant, impurities such as stones and dust are formed in the screw-like grooves. The effect was biased to one side, and there was a possibility of causing uneven wear on the side where the sowing and feeding rolls and rotating brush were biased.

In addition, the seed pods are easy to collect obliquely downward, which is one side of the direction in which the screw-shaped grooves are inclined. In order to avoid this, many seed pods are collected on the sowing and feeding rolls. There was a situation in which the load related to the increase was increased, and sowing seeds increased in a row, so that the sowing interval had to be widened.
In addition, when the divided sowing and feeding rolls are combined in a staggered arrangement, a small amount can be sowed, but there is a problem that long grain seeds and the like are easily clogged in the feeding recesses.

  Therefore, the present invention eliminates these problems, is configured so that the seeds are aligned in the feeding recess, the number of seeds fitted in the feeding recess is reduced, and the spacing between the feeding recesses on the outer periphery of the seeding feeding roll Seeding of a seedling sowing machine that makes it possible to spread a small amount by narrowing the pitch and narrowing or eliminating the interval between the seeding muscles after sowing that can be formed between the feeding recesses on the surface of the seedling box. It is an object to provide a feeding roll.

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

  In Claim 1, in the cylindrical seeding feeding roll of the seedling sowing 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 the outer periphery of the seeding feeding roll, The screw-shaped grooves are drilled from the left and right ends of the seeding and feeding roll to the center position of the left and right widths of the sowing and feeding roll, and from the left and right other ends, the screw shape is symmetrically reversed. The opposite groove formed is drilled to the center position of the left and right widths, and the groove of one feeding recess of the sowing feeding roll is arranged as a V-shaped groove.

  In Claim 2, the direction of the V-shaped arrangement | sequence groove | channel which the said delivery recessed part comprises is comprised so that the front-end | tip of the rotation direction may become the V-shaped front-end | tip of a V-shaped arrangement | positioning groove | channel with respect to the rotation direction of a seeding | feeding roll. It is a thing.

  According to a third aspect of the present invention, the seeding and feeding roll has a configuration in which one cylinder is divided into left and right parts, and screw-shaped grooves in the feeding recesses are processed so as to be bilaterally symmetrical, and then the left and right cylinders are formed. Is bonded and fixed to constitute one sowing and feeding roll, and the feeding recess is formed in the V-shaped array groove.

  In Claim 4, the roll groove angle which inclines with respect to the direction of the bus bar of the outer periphery of the seeding | feeding roll in the screw-shaped groove | channel which comprises the said feeding recessed part shall be 20-35 degrees.

  In Claim 5, the cross-sectional shape in the direction orthogonal to the axis of the seeding and feeding roll in the screw-shaped groove of the feeding recess is a depth obtained by increasing the depth by about 10% of the average seed soot thickness. The angle of the front corner with respect to the rotation direction is a chamfering angle of 30 ° or more.

  According to a sixth aspect of the present invention, a scraping groove into which the groove scraping fork is fitted is formed in the outer periphery of the sowing and feeding roll in the circumferential direction of the outer periphery of the sowing and feeding roll.

  In claim 7, on the outer periphery of the sowing and feeding roll, between the shutter bottom plate constituting the bottom of the shutter and the scraping brush rotating in contact with the outer periphery of the sowing and feeding roll, the axial direction of the sowing and feeding roll An intermediate gate is arranged in a parallel direction, and the intermediate gate is made of an elastic material so as to sweep away the overlapped seed potato and simultaneously push the seed potato into the groove.

  In Claim 8, the number of the screw-shaped strips of the feeding recessed part in the outer periphery of the said seeding | feeding delivery roll shall be 40-70.

As the effects of the present invention, the following effects can be obtained.
By providing a screw groove in the feeding recess of the seeding feeding roll and attaching a roll angle α of the screw groove, the seed potatoes easily flow downward (outside) along the groove, and as a result, the seed potatoes are aligned in the screw groove. The effect of lined up was obtained.

In addition, the seeds are aligned without gaps in the feeding recess by the intermediate gate and the V-shaped arrangement groove, and as a result, the sowing accuracy is improved.
Further, the seed pods are arranged so as to be aligned in the feeding recesses, the number of seed pods fitted in the feeding recesses is reduced, and the interval (pitch) of the feeding recesses on the outer periphery of the sowing feeding roll is reduced, thereby raising the seedling box The present invention relates to a seeding and feeding roll of a seedling sowing machine that enables a small amount of seeding by narrowing or eliminating the spacing between the seeding muscles after sowing that is formed between the feeding recess and the feeding recess.
As a result, seedling boxes are sown in a nearly uniform state, so that the number of missing stocks is reduced when planting with a rice transplanter.
Further, by providing the intermediate gate, the lifting of the seed potato is reduced and the load of the scraping brush is reduced.

The perspective view of the seedling sowing plant which has arranged the seedling sowing machine. The right view of a seedling seeding machine. The left view of the seedling seeder. The front view of the seedling seeding machine. The side view which shows arrangement | positioning of the sowing | feeding roll, scraping brush, shutter, and groove | channel scraping fork in the sowing machine for seedling raising. The side view which shows arrangement | positioning of a sowing feed roll, a scraping brush, a shutter, and an intermediate gate. The side view which shows the shape of the side guide plate arrange | positioned in the side surface of the shutter in the inside of the seedling machine for raising seedlings. The front view of the sowing | feeding out roll of the sowing machine for seedling raising. The side view of the seeding | feeding delivery roll seen from the roll side plate side. The front view of the left sowing | feeding delivery roll of the sowing | feeding delivery roll of the sowing machine for seedling raising. The front view of the right sowing | feeding delivery roll of the sowing | feeding delivery roll of the seedling seeding machine of this invention. A side view of a left sowing feed roll. Side surface sectional drawing of a orthogonal direction to the seeding | feeding roll axial center direction of a feeding recessed part. Front sectional drawing of a direction parallel to the axial direction of the seeding | feeding delivery roll of the edge part of a delivery recessed part. (A) Drawing which shows the relationship between the roll groove angle (alpha) of the feeding recessed part pierced by the seeding feeding roll of the seedling seedling seedling machine, the roll groove length, and the number of insertable grains. (B) The figure which shows V-shaped feeding recessed part, the roll groove angle (alpha), and the number of arrangement | positioning of seed | species. The figure which shows the relationship between the roll groove angle of the feeding recessed part pierced in the sowing feeding roll of the seedling seedling seedling machine, the roll groove length, and the sowing pitch P. (A) The side view of the state which entered the feeding recessed part in the state in which the soot seeds in the seeding | feeding feeding roll which comprised the V-shaped feeding recessed part aligned. (B) The top view which shows the arrangement | positioning state of the seed sowing seed in the sowing | feeding feeding roll which comprised the V-shaped feeding recessed part. (A) The side view of the state in which the soot seed in the sowing | feeding feeding roll which comprised the conventional horizontal straight type | mold feeding recessed part entered the feeding recessed part. (B) The side view which shows the state in which the seed soup in the conventional horizontal straight type | formula delivery recessed part overlapped in the delivery recessed part. (C) The top view which shows the arrangement | positioning state of the seed sowing seed | species in the conventional horizontal straight type | mold delivery recessed part similarly. Drawing which shows the average dimension of a seed pod among seeds.

In FIG. 1, the structure of the seedling box seeding plant in which the seedling seeding machine B is arranged as a part of the apparatus will be described.
A conveyor R on which a conveying roller 5 for conveying a seedling box (not shown) is laid is linearly arranged. On the transport conveyor R, a soil putting device A, a seedling sowing machine B, and a soil covering device C are sequentially arranged in the order of the feeding direction F of the seedling box.
In front of the soil pouring device A, a driving device H for the transport conveyor R is disposed, and in the subsequent stage of the soil pouring device A, a watering device D for irrigating the surface of the seedling box into which the soil has been placed is disposed. .

A seedling sowing machine B is disposed downstream of the irrigation device D, and a soil covering device C is disposed downstream of the seedling sowing machine B.
And a seedling box is conveyed along the direction of the conveyance direction F, and sowing of the seed pod is performed in a seedling box.
The present invention relates to the structure of a sowing feed roll K of a seedling seeding machine B for sowing seed seeds as seeds on the soil surface that has been put into a seedling box by a soil placing device A.

2, 3, 4, 5, and 6, the arrangement of the sowing feeding roll K, the scraping brush 33, and the shutter 40 in the seedling sowing machine B will be described.
In the seedling sowing machine B, a sowing and feeding roll drive shaft 1 and an intermediate gate 9 are installed 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 for rotating the scraping brush drive shaft 6 is wound to drive the scraping brush 33 at a rotational speed synchronized with the rotation of the seeding and feeding roll K.

A hopper 18 for putting seed pods as seeds is arranged in the upper part between the side plates 4L and 4R in the seedling sowing machine B, and a shutter 40 and a shutter bottom plate 41 are provided below the hopper 18. It has been.
By adjusting the opening degree of the shutter 40 with the shutter adjusting screw 39, the amount of the seed drop falling on the sowing and feeding roll K of the seed seed as a seed can be adjusted.

Further, in order to guide the seed dripping smoothly from the hopper 18 toward the sowing feeding roll K, the side guide plate 8 shown in FIG. 7 is fixed inside the left and right side plates 4L and 4R. Yes.
The side guide plate 8 is configured in a shape along the outer periphery of the seeding and feeding roll K between the shutter bottom plate 41 and the scraping brush 33.
The side guide plate 8 prevents the seeds between the shutter bottom plate 41 and the shutter 40 at the lower part of the hopper 18 from being pressed between the side plates 4L and 4R and the roll side plate 11 of the sowing feeding roll K and being damaged. Therefore, the seed pod is guided in the outer peripheral direction of the sowing feeding roll K.

As shown in FIG. 5, a seed guide device 35 that contacts the scraping brush 33 of the sowing and feeding roll K downstream of the seeding roll K while preventing the seed pods from dropping is abutted.
Further, in the subsequent stage of the seed guide device 35, groove scraping forks 2 that fit into the scraping grooves 7 provided on the outer periphery of the sowing feeding roll K shown in FIG. Configured and fixed.

Further, in order to improve the seed soot alignment effect of the sowing and feeding roll K provided with the V-shaped feeding recess 3, the position between the shutter bottom plate 41 and the scraping brush 33 as shown in FIG. In addition, an intermediate gate 9 is arranged in parallel with the seeding and feeding roll drive shaft 1.
The intermediate gate 9 is an elastic body constituted by a rubber plate or a brush arranged in parallel with the seeding / feeding roll drive shaft 1 of the seeding / feeding roll K, and is provided with an angle in a direction of escaping by the rotation of the seeding / feeding roll K. The urging spring 10 shown in FIG. 2 is configured to come into pressure contact in the direction of the seeding and feeding roll K.

  The intermediate gate 9 urges the seed soot not to overlap in the feeding recess 3. While being urged by the urging spring 10, the end of the intermediate gate 9 itself is constituted by a rubber plate or a brush, and is elastically urged toward the feeding recess 3 of the sowing feeding roll K.

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 in the feeding recess 3 on the outer periphery of the resin material, and a screw-like center position on the left and right from one end of the left sowing and feeding roll KL that is one of the left and right sides of the sowing and feeding roll K. Machined up to. And also from the other end of the right sowing feeding roll KR on the opposite sides of the left and right sides, a V-shaped groove array is formed by machining a symmetrical screw-like groove to the center position on the left and right. . In the present embodiment, the feeding recess 3 is formed by machining, but the feeding recess 3 formed by molding at the time of resin processing may be used.

In the sowing feeding roll K of the seedling seeding machine, the groove of the feeding recess 3 is drilled into a screw shape having a roll groove angle α so as to wrap around the outer circumference of the cylindrical sowing feeding roll K. Are formed from one end of the left and right left sowing feed roll KL of the sowing feed roll K to the center position of the left and right width of the sowing feed roll K, and from the other end of the right and left right sowing feed roll KR. However, the groove of the feeding recess 3 of one sowing feeding roll K is arranged in a V shape by drilling the groove having the same roll groove angle α on the opposite side symmetrically configured to the center position. It is formed by doing.
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 array groove formed by the feeding recess 3 is configured such that the V-shaped tip of the V-shaped array groove is forward in the rotational direction with respect to the rotation direction of the seeding and feeding roll K.
In this way, by configuring the V-shaped end of the V-shaped arrangement groove to be ahead of the rotation direction with respect to the rotation direction of the seeding and feeding roll K, the flow of the seed potatoes and the movement of the screw groove are synchronized. In this state, the seed pods are inserted into the screw-like groove in order, and are aligned in the screw-like groove as shown in FIGS. 15 and 16.
In addition, since the V-shaped arrangement grooves are used, the seed potatoes flow from the center to the left and right ends (outside downward), and the seed potatoes can be prevented from staying at one of the left and right ends of the feeding recess 3. .
This makes it possible to accurately drop the minimum number of seed pods onto the surface of the seedling box.

The sowing and feeding roll K is divided into a left and right left sowing and feeding roll KL and a right sowing and feeding roll KR, and the screw-shaped groove of the feeding recess 3 is symmetric. Then, the right and left cylinders are bonded and fixed to form one sowing feeding roll K, and the feeding recess 3 is formed in a V shape.
And the roll side plate 11R * 11L is covering the cylindrical part at the right and left ends of one sowing and feeding roll K.
The number of grooves on one circuit is preferably 40 to 70, but in the embodiment, it is 60. The optimum is 60 pieces.

The optimum value of the roll groove angle α (an oblique angle with respect to the direction of the generatrix on the outer periphery of the roll) of the screw-like groove is calculated under the following conditions.
Weight of buds: 33.6 g / 1000 grains Average size of buds: 7 mm long and 3.5 mm thick (disclosed in FIG. 19)
Nursery box dimensions: 580 mm long x 280 mm wide
Seeding amount in seedling box: 60 g / box Under the above conditions, 1785 grains [60 ÷ (33.6 / 1000)] per seedling box will be seeded.

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

Moreover, in FIG. 16, the relationship between the roll groove angle α, the number of insertable grains Z, and the sowing pitch P is illustrated.
When the roll groove angle α is increased, the number Z of insertable grains with respect to one screw-like groove is also increased.
In the case of a V-shaped arrangement groove, the number of insertable grains Z of one row of screw-shaped grooves increases, so when calculating the necessary sowing pitch P from the necessary insertable grain number Z, the sowing pitch P is Can be bigger.

The general number of seedlings of the rice transplanter is 18 times for vertical feed and 36 times for horizontal feed with respect to mat seedlings in one nursery box. Is 15.5 mm (NJ = 280 ÷ 18 times), and the longitudinal feed pitch NT is 16 mm (NT = 580 ÷ 36 times).
As a result, if the sowing pitch P is not shorter than 16 mm, a place where there is no seedling is generated, and there is a possibility that a missing line is generated.
From FIG. 16, the roll groove angle α of the screw groove is desirably 35 ° or less so that the longitudinal feed pitch NT is shorter than 16 mm.

On the other hand, when the roll angle α is parallel to the seeding and feeding roll drive shaft 1 of the feeding recess 3 as in the prior art, it is 0 because it is a straight line. Therefore, even if it is assumed that it is a V-shaped arrangement, the number of seed potatoes arranged in a row is calculated to be 40.
However, in the case of the conventional left and right straight feeding recesses, however, about 55 grains of seed potatoes are arranged. This is because the seed pods are lined up side by side, and until the roll angle α is 20 ° or more experimentally, it is recognized that the seed potatoes are overlapped and inserted into the feeding recess, so that the same tendency is found. Yes. By adding an angle of 20 ° or more to the roll angle α, it is easy for the soot to flow downward, and as a result, it is arranged in a row to produce the operation and effect of the present invention.

Therefore, the optimum roll groove angle α is 20 to 35 °. FIG. 15 shows the result of trial production of the seeding and feeding roll at this intermediate value of 28 ° and seeding test.
From the above results, when the roll groove angle α is 28 °, the surface area of the sowing surface of the seedling box is formed by the length of the vertical feed and the horizontal feed of the mat seedling (15.5 × 16 mm) It was proved that two or more seed pods were always sown in the grid, so that the seeds could be uniformly sown. Therefore, the optimum roll groove angle α is set to 28 °.
Thereby, when scraping at a time with the planting claws of the rice transplanter, there are two seedlings, so that they are planted in the farm scene, and no stock loss occurs.

  As shown in FIG. 13, the cross-sectional shape of the feeding recess 3 is 3.8 ± 0.05 mm, which is about 10% higher than the average seed soot thickness of 3 mm, and the width is 6.1 mm. In addition, with respect to the rotation direction of the sowing feed roll at the front portion of the V-shaped array groove of the feeding recess 3, the corner on the entrance side is a straight feeding recess configuration along the conventional sowing feeding roll drive shaft 1. Although the chamfering angle is 45 °, in the case of a V-shaped array groove, if the angle is 45 ° as in the prior art, the seed can easily escape from the feeding recess. In order to eliminate this problem, chamfering of 30 ° is adopted. On the other hand, if the chamfer is 30 ° or less, the seeds are difficult to enter the feeding recess.

  Further, as shown in FIG. 14, the feeding recess 3 is formed by gradually reducing the depth of the groove at the left and right ends of the screw-shaped groove, and the feeding recess 3 at the left and right ends. It is drilled 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 formed in the circumferential direction of the outer periphery of the seeding feeding roll K.

  Moreover, the intermediate gate 9 is provided in the position of the angle 55 degree of the intermediate | middle of a seeding | feeding roll and a rotary brush. The intermediate gate 9 is configured such that 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 seeds overlapped in the feeding recess 3 are swept away. At the same time, it plays the role of pushing the seed pods into the grooves to align them in a row. The intermediate gate 9 is attached in the horizontal direction, and the attachment angle of the intermediate gate 9 is adjustable.

  FIG. 18 shows the relationship between the conventional sowing and unwinding roll K ′ and the soot alignment. FIG. 18 (a) shows a state in which the seed pod enters the feeding recess in the sowing and feeding roll K 'provided with the conventional horizontal straight type feeding recess 3'. FIG. 18B shows a state in which the soot seed overlaps with the feeding recess in the conventional horizontal straight type feeding recess 3 ′. (C) of FIG. 18 shows the arrangement state of the seed sow sowed in the conventional horizontal straight type feeding recess 3 ′.

As described above, conventionally, the soot seeds are inserted so as to overlap with the feeding recesses configured in a straight line in parallel with the sowing feeding roll drive shaft 1. There was a problem that two grains slipped out of the feeding recess.
In addition, in the case of a straight feeding recess parallel to the conventional sowing feeding roll drive shaft 1, a large number of seed pods overlapped inside, so it is necessary to set the sowing pitch P to 18 mm or more. There was a problem in that one seed pod did not fall in the square of (15.5 × 16 mm), which is the area of vertical feeding and horizontal feeding of the seedlings.

  The present invention is improved as shown in FIG. (A) of FIG. 17 has shown the state which entered into the feeding recessed part 3 in the state in which the seed potatoes were arranged in the seeding feeding roll K provided with the V-shaped feeding recessed part 3. FIG. (B) of FIG. 17 has shown the arrangement | positioning state of the sowing | seed soot in the sowing | feeding feeding roll K which comprised the V-shaped feeding recessed part 3. FIG.

In the sowing feed roll K of the seedling sowing machine, the groove of the feed recess 3 drilled in the cylindrical sowing feed roll K is drilled into a screw shape so as to wind the outer periphery of the sowing feed roll K, and the screw The groove-shaped groove is drilled from the left and right end portions of the sowing and feeding roll K to the center position of the left and right width of the sowing and feeding roll K, and is symmetrically reversed from the left and right other end portions. The V-shaped feeding recess is formed by drilling the opposite-side groove configured in the above to the center position and arranging the grooves of one feeding recess 3 of the sowing feeding roll K as a V-shaped groove. 3 seeds are aligned and inserted one by one.
This is because the soot flows along the V-shaped feeding recess 3 and the V-shaped feeding recess 3 moves along the flow, so that the soot moves in the direction aligned in the longitudinal direction. It is because it inserts in the inside of the character-shaped delivery recessed part 3 from order.
Therefore, even when scraping with the scraping brush 33, it is no longer necessary to scrape the seeds that overlap.

Thus, 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 outer peripheral bus of the sowing feeding roll K, the sowing pitch P is narrower than the conventional 18 mm 15. It is possible to obtain a result that at least two grains fall in the square of (15.5 × 16 mm), which is the area of vertical feeding and horizontal feeding of the mat seedling. It was.
This also made it possible to disperse a small amount of seed pods, and even in the case of a small amount of seed sowing, it was possible to eliminate a stock loss when planting with a rice transplanter. The optimum roll groove angle α is 28 °.

  The direction of the V-shaped array groove formed by the feeding recess 3 is configured such that the V-shaped tip of the V-shaped array groove is in front of the rotation direction with respect to the rotation direction of the sowing and feeding roll K. As a result, the seeds flowed along the V-shaped feeding recess 3 in a synchronized manner, aligned in the longitudinal direction, and dropped into the feeding recess 3.

  In addition, the sowing and feeding roll K has a structure in which one cylinder is divided into left and right parts as shown in FIGS. The left sowing feeding roll KL and the right sowing feeding roll KR are configured by processing the screw-shaped groove of the feeding recess 3 in the two divided cylinders so as to be bilaterally symmetric, and then the left sowing feeding roll KL. And the right sowing and feeding roll KR are fitted and fixed together to form one sowing and feeding roll K, and the feeding recess 3 is formed in a V shape. Therefore, although the processing of the feeding recess 3 of the sowing and feeding roll K is a screw-shaped groove, the sowing and feeding roll K can be manufactured by a cost-effective process without using an expensive processing device. It was.

Moreover, since the cross-sectional shape in the direction orthogonal to the axis of the seeding and feeding roll K in the screw-shaped groove of the feeding recess 3 is a depth that is about 10% higher than the average seed soot thickness, it is V-shaped. It became possible to maintain the state in which the seed pods were aligned and fitted one by one into the screw-shaped strips of the array grooves.
Further, as in the case of the straight feeding recess 3 along the conventional seeding and feeding roll drive shaft 1, two or more seed pods are not inserted in an overlapping state.
In addition, the angle of the front corner with respect to the rotation direction of the seeding and feeding roll is set to be 30 ° or more, so that the seeds can easily enter the feeding recess 3 and can be easily scraped off after entering. It was possible to obtain a feeding recess 3 that was not possible.

  Further, on the outer periphery of the sowing and feeding roll K, the axis of the sowing and feeding roll K is disposed between the shutter bottom plate 41 constituting the bottom of the shutter 40 and the scraping brush 33 rotating in contact with the outer periphery of the sowing 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 seeds are pushed into the groove at the same time as sweeping over the overlapping seeds, so the V-shaped feeding recess The seed pods fitted in 3 were not scraped off more than necessary, and could be dropped at the lower part of the sowing feeding roll K in an aligned state.

  In addition, the scraping groove 7 for the groove scraping fork 2 is formed along the outer periphery of the seeding feeding roll K along the outer periphery separately from the feeding concave portion 3, so that the seeding remaining in the feeding concave portion 3. Seeds that did not fall at the bottom of the feeding roll K could be forcibly dropped by the groove scraping fork 2. In addition, the scraping groove 7 of the connection part of the left sowing feeding roll KL and the right sowing feeding roll KR of the sowing feeding roll K is formed, for example, by setting the dimensions so that the scraping groove 7 can be formed when fitted. Has been.

A Seeding device B Seedling machine for seedling C Covering device D Irrigation device F Feeding direction of seedling box K Seeding feeding roll KL Left sowing feeding roll KR Right sowing feeding roll Z Number of insertable grains P Seeding pitch H Drive device α Roll groove angle X Roll groove length 1 Seeding 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 Biasing spring 11 Roll side plate 18 Hopper 33 Scraping brush 39 Shutter adjusting screw 40 Shutter 41 Shutter bottom plate

Claims (8)

In the cylindrical seeding feeding roll of the seedling sowing machine,
Drilling the groove of the feeding recess to be drilled in the sowing feeding roll into a screw shape so as to wind the outer periphery of the sowing feeding roll,
The screw-shaped groove is drilled from the left and right end portions of the sowing feed roll to the center position of the left and right widths of the sowing feed roll,
From the other ends of the left and right sides, the opposite groove formed in the opposite screw shape symmetrically is drilled to the center position of the left and right widths,
A seeding and feeding roll of a seedling sowing machine characterized by arranging the grooves of one feeding recess of the sowing and feeding roll as V-shaped grooves. In the sowing feed roll of the seedling sowing machine according to claim 1,
The direction of the V-shaped arrangement groove formed by the feeding recess is configured such that the V-shaped tip of the V-shaped arrangement groove is forward in the rotation direction with respect to the rotation direction of the seeding feeding roll. Seeding feed roll of seedling seeder. In the sowing feed roll of the seedling sowing machine according to claim 1,
The seeding and feeding roll has a configuration in which one cylinder is divided into two left and right, and the screw-shaped groove of the feeding recess is processed so as to be symmetrical to each other, and then the left and right cylinders are bonded and fixed. A seeding and feeding roll of a seedling sowing machine, wherein one seeding and feeding roll is configured, and a feeding recess is formed in a V-shaped array groove. In the sowing feed roll of the seedling sowing machine according to claim 1,
The seeding feed roll of the seedling sowing machine characterized in that the roll groove angle inclined with respect to the direction of the generatrix of the outer periphery of the sowing feed roll in the screw-shaped groove forming the feeding recess is 20 to 35 °. . In the sowing feed roll of the seedling sowing machine according to claim 1,
The cross-sectional shape in the direction perpendicular to the axis of the seeding and feeding roll in the screw-like groove of the feeding recess is a depth obtained by increasing the depth by about 10% of the average seedling thickness,
The sowing roll of the sowing machine for raising seedlings, characterized in that the angle of the front corner with respect to the rotation direction of the sowing roll is a chamfer angle of 30 ° or more. In the sowing feed roll of the seedling sowing machine according to claim 1,
A seeding feed roll for a seedling sowing machine, characterized in that, on the outer periphery of the sowing feed roll, a scraping groove into which a groove scraping fork is fitted is formed in the circumferential direction of the outer periphery of the sowing feed roll. In the sowing feed roll of the seedling sowing machine according to claim 1,
An intermediate gate in a direction parallel to the axial direction of the seeding / feeding roll between the shutter bottom plate constituting the bottom of the shutter and the scraping brush rotating in contact with the outer periphery of the seeding / feeding roll on the outer periphery of the seeding / feeding roll. And place
The intermediate gate is made of an elastic material, and is configured to sweep away the overlapped seed pods and simultaneously push the seed pods into the groove. In the sowing feed roll of the seedling sowing machine according to claim 1,
The seeding and feeding roll of a seedling sowing machine characterized in that the number of screw-like grooves in the feeding recess on the outer periphery of the seeding and feeding roll is 40 to 70.