JP2016214264A - Direct sowing machine, and direct sowing method using direct sowing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform dissemination and to supply a pest control agent to a paddy field, in the state where the pest control agent can function effectively.SOLUTION: A direct sowing machine includes a sowing device 4 for directly sowing seed rice to a paddy field, and an agent supply device 3 for supplying a pest control agent, further includes an agent embedding means 5 for supplying so that a supply position of the pest control agent to the paddy field by the agent supply device 3 is at a depth position capable of avoiding exposure to a mud surface.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a direct sowing machine including a sowing apparatus for directly sowing seed pods on a paddy field, and a chemical supply apparatus for supplying a chemical for controlling pests, and a direct sowing method using the direct sowing machine.

As a technique for supplying such a pest control drug as described above, direct seeding is not performed, but the technique described in [1] below is known.
[1] It is configured to spray and supply the medicine to the mat-like seedlings arranged on the seedling placement part of the seedling placing stand by using a medicine spraying device, and to plant the seedlings already supplied with the medicine in the field (Patent Document 1). reference).

Japanese Patent Laying-Open No. 2010-136675 (paragraph number “0052”, see FIG. 5)

In the above-mentioned conventional technology, since the pest control agent is supplied to the mat seedlings, and the mat seedlings are divided and planted in the field, the pest control is used at a position very close to the planted seedlings. This is useful in that the drug can act effectively.
However, there are the following problems when trying to supply a disease control chemical with a direct seeding machine instead of a seedling planting device.
In other words, since the direct seeding machine does not have mat-like seedlings or seedling planting devices, simply spraying the pest control drug on the field will leave the pest control drug exposed to sunlight immediately after spraying. . In general, pest control drugs are legally regulated so that the active ingredient disappears depending on the time of exposure to sunlight, so the effectiveness of pest control drugs diminishes over time, making them necessary as pest control drugs. The purpose cannot be achieved, which is not preferable.

  An object of the present invention is to enable seeding and supply of a pest control agent to a rice field in a state where the pest control agent can be effectively acted.

  The technical means of the direct seeder according to the present invention taken to achieve the above object has structural features and operational effects in the following points.

[Solution 1]
The technical means of the present invention taken in order to solve the above-mentioned problems include a seeding device for directly sowing seed pods on a paddy field and a drug supply device for supplying a pest control drug, and pest control by the drug supply device. The medicine embedding means is provided so that the supply position of the pharmaceutical agent with respect to the rice field is a depth position where exposure to the mud surface can be avoided.

[Operation and effect of invention according to Solution 1]
According to the invention relating to the above solution 1, the seeding device for directly sowing seed pods on the paddy field is used, but since the medicine embedding means is provided, the supply position of the pest control medicine to the paddy surface is Seeding can be carried out in a depth position where exposure to the surface can be avoided.
Therefore, there is an advantage that the pest control drug can be prevented from being exposed to sunlight immediately after the application, and the effectiveness of the pest control drug for seed pods can be easily achieved as expected.

[Solution 2]
Another technical means of the present invention taken in order to solve the above-described problem is that the medicine embedding means is configured such that the supplied medicine is positioned lower than the supply position of the seeding device with respect to the rice seed surface. It is what.

[Operation and effect of invention according to Solution 2]
According to the invention relating to Solution 2 above, since the chemical for pest control is supplied so as to be positioned lower than the seed pod even if the supply position of the seed pod to the rice field by the sowing device is the mud surface, the mud surface Even in the case of supplying seed potatoes nearby, there is an advantage that the pest control agent can be prevented from being exposed to sunlight immediately after the administration, and its effectiveness can be ensured as expected.

[Solution 3]
The other technical means of the present invention taken in order to solve the above problems further comprises a fertilizer supply device for supplying fertilizer, and the supply position of the chemical embedding means with respect to the pest surface by the chemical embedding means is the seed sowing by the sowing device. It is a position that is closer to the supply position of the sowing device to the rice field than the supply position of the fertilizer to the rice field by the fertilizer supplied to the position separated from the supply position to the rice field by a predetermined interval. .

[Operation and effect of invention according to Solution 3]
According to the invention relating to the above solution 3, the supply position of the chemical for pest control by the chemical embedding means to the rice field is closer to the supply position of the fertilizer to the rice field by the seeding device than the supply position of the fertilizer to the rice field. Position.
As a result, the soil environment that is suitable for the growth process of seed pods can be achieved by the effect of controlling the disease and pest damage to seed pods using a pest control agent prior to the time when nutrient supply to seed pods using fertilizer is desired. There is an advantage that can be obtained.

[Solution 4]
The other technical means of the present invention taken in order to solve the above-mentioned problem is that the drug embedding is between a supply position for the seed surface by the sowing apparatus and a supply position for the rice field by the fertilizer supplying apparatus. This means that the supply position of the medicine for controlling pests by means to the rice field is set.

[Operations and effects of invention according to Solution 4]
According to the invention according to the above solution 4, the supply position of the pest control agent for the rice field exists between the supply position of the seed pod for the rice field and the supply position of the fertilizer for the rice field, and the supply of the pest control drug is provided. As a matter of course, the position is closer to the seed supply position than the fertilizer supply position. Thereby, there exists an advantage which can obtain the soil environment suitable for the growth process of the seed pod similar to the case by the solution means 3. FIG.
The root of the seed pod grows in the process of growing, and its extension direction is easily directed to the fertilizer application position, but it is used for pest control between the seed potato supply position and the fertilizer supply position. The supply position of the drug is present while the root of the seed pod extends toward the fertilization position, and the effect of the pest control drug is easily exerted on the root. Therefore, there is an advantage that a desired effect can be easily obtained using a relatively small amount of a pest control agent.

[Solution 5]
The other technical means of the present invention taken to solve the above-mentioned problem is that the supply position of the seeding device to the rice field by the seeding device is directly above the supply position of the medicine for pest control by the chemical embedding means to the rice field. That's what it means.

[Operation and effect of invention according to Solution 5]
According to the invention relating to the above solution 5, the pest control drug dissolved in the soil is easy to be applied to the entire area around the seed pods immediately above, and the medicinal effect of the pest control drug is easily ensured. There are advantages.

[Solution 6]
Other technical means of the present invention taken in order to solve the above-mentioned problem is that the chemical embedding means is configured to provide a pest control chemical that is exposed on the mud surface at the supply site of the pest control chemical by the chemical supply device. And a pressing body that is pressed against the surface of the mud, so that the pest control chemical is transferred to a supply position at a depth that allows exposure to the mud surface.

[Operations and Effects of Invention According to Solution 6]
According to the invention relating to the above solution 6, since the pressing body that presses the pest control chemical that is exposed to the mud surface against the paddy side is provided, the pest control chemical is exposed to the mud surface at a position near the mud surface. It is possible to easily shift to an avoidable depth. Therefore, even when the seed pods are sown at a position close to the mud surface, it is possible to avoid exposing the pest control drug to the mud surface, and it is easy to supply the pest control drug to a position closer to the seed pod supply location. There is an advantage.

[Solution 7]
Another technical means of the present invention taken in order to solve the above-mentioned problem is that the pressing body is constituted by a leveling float equipped so that the relative vertical position can be changed with respect to the traveling machine body.

[Operation and effect of invention according to Solution 7]
According to the invention according to the above solution 7, since the leveling float that is a member having a function of pressing the mud surface near the paddy side is used as a pressing body, the pest control agent is used near the mud surface. There is an advantage that the structure can be simplified without requiring a dedicated presser body for shifting to a depth where exposure to the mud surface can be avoided at the position.

[Solution 8]
Other technical means of the present invention taken in order to solve the above-mentioned problems are as follows: the chemical embedding means supplies a pest control chemical into the soil below the mud surface, and the gutter It is a thing provided with the covering body which backfills the groove | channel formed by.

[Operation and effect of invention according to Solution 8]
According to the invention relating to the above solution 8, it becomes easier to perform the operation of supplying the pest control agent into the soil below the mud surface by using the grooving device, and the seed culm into the soil below the mud surface. There is an advantage in that it is easy to appropriately set the supply position of the pest control drug at the time of supply.

[Solution 9]
Another technical means of the present invention taken to solve the above-mentioned problems is that the fertilizer supplied from the fertilizer application device and the supply pest-controlling agent supplied from the chemical supply device are merged and supplied from a common grooving device. It is configured as follows.

[Operations and effects of invention according to Solution 9]
According to the invention concerning the above solution 9, both the fertilizer and the pest control agent can be supplied into the soil using a common groover, and each is supplied using a separate groover. There is an advantage that the structure can be simplified as compared with the case.

The technical means of the direct seeding method according to the present invention taken to achieve the above object has structural features and operational effects in the following points.
[Solution 10]
The technical means in the direct sowing method of the present invention taken to solve the above problems comprises a sowing step of directly sowing seed pods on paddy fields, and a chemical supply step of supplying a pest control chemical, and the chemical supply step The supply position of the chemical for controlling insects and pests to the paddy surface is supplied at a depth position where exposure to the mud surface can be avoided.

[Operations and Effects of Invention According to Solution 10]
According to the invention relating to the above solution 10, the seed pods are directly sown to the paddy field, but the supply position of the pest control agent on the paddy surface is a depth position where exposure to the mud surface can be avoided. I have to.
Therefore, while maintaining the state in which the pest control drug acts effectively on the seed pods from the early stage after the administration, the pest control drug is kept from being exposed to sunlight, There is an advantage that the effectiveness of the pest control agent can be ensured as expected.

[Solution 11]
Other technical means of the present invention taken to solve the above problem is that the supply position of the medicine supplied in the medicine supply step to the rice field is lower than the supply position of the seed rice to the rice field in the seeding step. It means that it was made.

[Operations and Effects of Invention According to Solution 11]
According to the invention relating to the above solution 11, the pest control agent is supplied so as to be positioned lower than the seed pod even if the supply position of the seed pod to the rice field in the sowing step is the mud surface. Even in the case of supplying seed potatoes nearby, there is an advantage that the pest control agent can be prevented from being exposed to sunlight immediately after the administration, and its effectiveness can be ensured as expected.

[Solution 12]
The other technical means of the present invention taken to solve the above problem further includes a fertilizer supply step for supplying fertilizer, and the supply position of the chemical for controlling pests in the chemical supply step with respect to the rice field is the seed sowing by the seeding step. It is a position that is closer to the supply position for the seed surface of the seed seeds by the sowing step than the supply position for the fertilizer field by the fertilizer supply step that is supplied at a predetermined distance from the supply position for the rice field. is there.

[Operations and Effects of Invention According to Solution 12]
According to the invention relating to the above solution 12, the supply position of the chemical for pest control in the chemical supply step with respect to the rice field is closer to the supply position with respect to the rice paddy field with the seeding device than the supply position with respect to the rice field with the fertilizer It becomes.
As a result, the soil environment that is suitable for the growth process of seed pods can be achieved by the effect of controlling the disease and pest damage to seed pods using a pest control agent prior to the time when nutrient supply to seed pods using fertilizer is desired. There is an advantage that can be ensured.

[Solution 13]
The other technical means of the present invention taken to solve the above-described problem is that the chemical supply step is between the supply position for the seed surface of the seed pod by the sowing step and the supply position for the rice surface by the fertilizer application step for supplying fertilizer. This means that the supply position of the medicine for controlling pests and pests with respect to the rice field is set.

[Operations and Effects of Invention According to Solution 13]
According to the invention relating to the solving means 13, the supply position of the pest control agent for the rice field exists between the supply position of the seed pod for the rice field and the supply position of the fertilizer for the rice field, and the supply of the pest control drug is provided. As a matter of course, the position is closer to the seed supply position than the fertilizer supply position. Thereby, there exists an advantage which can obtain the soil environment suitable for the growth process of the seed pod similar to the case by the solution means 12. FIG.
The root of the seed pod grows in the process of growing, and its extension direction is easily directed to the fertilizer application position. The supply position of the drug is present while the root of the seed pod extends toward the fertilization position, and the effect of the pest control drug is easily exerted on the root. Therefore, there is an advantage that a desired effect can be easily obtained using a relatively small amount of a pest control agent.

[Solution 14]
According to another technical means of the present invention taken to solve the above-mentioned problem, the supply position of the seed pod to the rice field by the sowing process is a position immediately above the supply position of the chemical for pest control by the chemical supply process to the rice field. Is.

[Operations and Effects of Invention According to Solution 14]
According to the invention relating to the above solution 14, the pest control drug dissolved in the soil is easy to reach the entire area around the seed pods directly above, and the pest control drug can be surely effective. There are advantages.

[Solution 15]
The other technical means of the present invention taken in order to solve the above problems is that, in the chemical supply step, after the chemical for controlling pests is supplied to the mud surface, the chemical for controlling pests exposed on the mud surface is placed on the upper side. It is that it is made to move to the supply position of the depth which can be pressed to the paddy field side and can avoid exposure to the mud surface.

[Operations and Effects of Invention According to Solution 15]
According to the invention relating to the above solution 15, since the presser body that presses the pest control chemical that is exposed to the mud surface against the paddy side is provided, the pest control chemical is exposed to the mud surface at a position near the mud surface. It is possible to easily shift to an avoidable depth. Therefore, even when the seed pods are sown at a position close to the mud surface, it is possible to avoid exposing the pest control drug to the mud surface, and it is easy to supply the pest control drug to a position closer to the seed pod supply location. There is an advantage.

[Solution 16]
Another technical means of the present invention taken in order to solve the above problems is that, in the drug supply step, after supplying the pest control drug to the groove formed on the surface, the groove is backfilled and the pest control drug is supplied. Is supplied to the soil below the mud surface.

[Operations and Effects of Invention According to Solution 16]
According to the invention relating to the solution means 16 described above, it becomes easier to perform the operation of supplying the pest control agent into the soil below the mud surface, and the control of the pest when the seed potato is supplied into the soil below the mud surface. There is an advantage that it becomes easy to appropriately supply the pharmaceutical agent.

[Solution 17]
Another technical means of the present invention taken to solve the above problems is to supply the fertilizer supplied in the fertilization supply process and the supply pest control drug in the chemical supply process to the common position by joining them in the middle of supply. It is what I did.

[Operations and Effects of Invention According to Solution 17]
According to the invention relating to the solution means 17 described above, both the fertilizer and the pest control agent can be supplied into the soil in a common supply process, and compared with the case where each is supplied in a separate supply process, There is an advantage that simplification of the structure is facilitated with the simplification of the supply route of the fertilizer into the inside and the pest control agent.

It is a side view which shows the whole direct seeding machine. It is a side view which shows a paddy field working apparatus. It is a rear view which shows a fertilizer application part. It is a rear view which shows a chemical | medical agent supply apparatus part. It is a rear view which shows a sowing apparatus part. It is a top view which shows the float part for leveling. It is explanatory drawing in the side view which shows the power transmission structure with respect to the feeding mechanism of a fertilizer applicator. It is explanatory drawing in the side view which shows the power transmission structure with respect to the delivery mechanism of a chemical | medical agent supply apparatus. It is explanatory drawing which shows the relationship between a chemical | medical agent supply state and a sowing state. It is explanatory drawing which shows the relationship between the chemical | medical agent supply state and seeding state in another embodiment. It is explanatory drawing in the side view which shows the paddy field working apparatus in another embodiment. It is explanatory drawing which shows the direct sowing state using a direct sowing machine, (a) shows the direct sowing state in the up-down direction cross section in the direction orthogonal to the airframe traveling direction, and (b) shows the direct sowing state in plan view. Yes. It is explanatory drawing which shows the direct sowing state using the direct sowing machine in another embodiment, (a) shows the direct sowing state in the up-down direction cross section in the direction orthogonal to the airframe traveling direction, and (b) is the direct sowing in plan view. Indicates the state. It is explanatory drawing which shows the direct sowing state using the direct sowing machine in another embodiment, (a) shows the direct sowing state in the up-down direction cross section in the direction orthogonal to the airframe traveling direction, and (b) is the direct sowing in plan view. Indicates the state. It is explanatory drawing which shows the direct sowing state using the direct sowing machine in another embodiment, (a) shows the direct sowing state in the up-down direction cross section in the direction orthogonal to the airframe traveling direction, and (b) is the direct sowing in plan view. Indicates the state. It is explanatory drawing which shows the direct sowing state using the direct sowing machine in another embodiment, (a) shows the direct sowing state in the up-down direction cross section in the direction orthogonal to the airframe traveling direction, and (b) is the direct sowing in plan view. Indicates the state. It is explanatory drawing which shows the direct sowing state using the direct sowing machine in another embodiment, (a) shows the direct sowing state in the up-down direction cross section in the direction orthogonal to the airframe traveling direction, and (b) is the direct sowing in plan view. Indicates the state.

Hereinafter, an embodiment of a direct seeder according to the present invention will be described with reference to the drawings.
[Overall configuration of direct seeder]
FIG. 1 is a side view showing the entire direct seeding machine according to the present invention. As shown in FIG. 1, in the direct seeder according to the present invention, the front part of the body frame 10 is supported by a pair of left and right front wheels 11 and 11 that can be driven and steered, and the rear part is a pair of left and right driveable rear parts. By being supported by the wheels 12, the self-propelled traveling machine body 1 is configured. A paddy field work device A is connected to the rear portion of the vehicle body frame 10 of the traveling machine body 1 via a link mechanism 16.

  The traveling machine body 1 includes a driving portion 13 at the front portion of the body frame 10 and is configured to drive the front wheels 11 and the rear wheels 12 by a driving force from an engine 14 provided in the driving portion 13 so as to self-run. It is. The traveling machine body 1 is configured as a riding type equipped with a driver seat 15 provided at the rear portion of the vehicle body frame 10.

In the paddy field work device A, the link mechanism 16 is swung up and down with respect to the vehicle body frame 10 by the hydraulic cylinder 17, so that the leveling float 5 touches the field mud and the leveling float 5 The elevator is moved up and down to a lifted and non-working state that is elevated from the field mud.
That is, the direct sowing machine lowers the paddy field work device A to the lowered work state and causes the traveling machine body 1 to travel, so that the paddy field work device A performs the seeding work for four lines, the fertilization work for four lines, and the four lines. It is configured to perform a medicine operation.

[Paddy work equipment]
The paddy field working apparatus A will be described.
As shown in FIG. 2 thru | or FIG. 6, the paddy field working apparatus A is equipped with the fertilizer application apparatus 2, the chemical | medical agent supply apparatus 3, and the seeding apparatus 4, and equips the lower part with the float 5 for leveling.
FIG. 2 is a side view showing the entire paddy field working apparatus A. FIG. 3 is a rear view of the paddy field working apparatus A, and shows a state in which the rear seeding device 4 portion and the structure of the medicine supply device 3 portion after the medicine feeding portion 31 are omitted. FIG. 4 is a rear view of the paddy field work apparatus A, and shows the state of the rear side sowing apparatus 4 part and the structure after the fertilizer feeding part 21 of the fertilizer application part 2 omitted. FIG. 5 is a rear view of the paddy field working apparatus A, and illustrates the seeding device 4 portion without the fertilizer application device 2 portion and the chemical supply device 3 portion on the front side. FIG. 6 is a plan view showing the leveling float 5 portion.

As shown in FIGS. 1 to 3, the paddy field work apparatus A includes a machine frame 6 having a front end connected to a lower part of a rear link 16 a that is upward and downward of the machine body constituting the link mechanism 16.
The machine frame 6 is supported by a fertilizer tank 20 including four fertilizer storage portions 20a provided in a row in the horizontal direction of the machine body at the front part, and the machine frame frame 6 has a rear part of the machine frame frame 6 in the horizontal direction. A seeding tank 40 provided with four seed seed accommodating parts 40a provided in a line is supported.

  Moreover, as shown in FIG.4 and FIG.7, 8, four chemical | medical agents divided so that the space separate from the space in the fertilization tank 20 may be formed in the state accommodated in the said fertilization tank 20 A medicine storage tank 30 including a storage portion 30a is disposed, and a medicine delivery portion 31 for delivering the medicine in the medicine accommodation tank 30 is disposed within a frame in the front-rear direction between the fertilizing tank 20 and the seeding tank 40. 6 is supported.

Below the machine frame 6, there is provided one wide leveling float 5 having a front end side that is swingable up and down around the swing fulcrum x on the rear side.
The machine frame 6 is connected to the rear link 16a via a rolling fulcrum shaft 16b facing the machine body. Accordingly, the paddy field work apparatus A is configured to be capable of rolling with respect to the traveling machine body 1 around the rolling axis core z in the front-rear direction of the rolling fulcrum shaft 16b.

The machine frame 6 includes a drive case 60 that is long in the lateral direction of the machine frame 6, the front end of which is connected to the rear link 16 a by a rolling fulcrum shaft 16 b, and the machine frame separately from both lateral ends of the drive case 60. 6 and a pair of left and right transmission cases 61 extending rearward.
The drive case 60 is provided with a feed case 60A to which the transmission power from the power transmission shaft 18 that transmits the power of the engine 14 on the traveling machine body 1 is input at the center in the left-right direction, and the lower side of the feed case 60A. A pair of left and right output shaft cases 60B and 60B are extended laterally outward from both lateral sides.

As shown in FIGS. 3 and 4, the power input to the feed case 60 </ b> A is transmitted to the drive mechanism 22 of the fertilizer application device 2 via the transmission shaft 62 built in the pair of left and right output shaft cases 60 </ b> B and 60 </ b> B. It is configured to be transmitted to the drive mechanism 32 of the medicine supply device 3.
The power of the transmission shaft 62 built in the pair of left and right output shaft cases 60B, 60B is transmitted to the rear seeding device 4 through a transmission mechanism (not shown) built in the pair of left and right transmission cases 61. Is also transmitted, and is configured to drive the seed vat feeding portion 41 of the seeding device 4.

[Fertilizer]
The fertilizer applicator 2 will be described.
As shown in FIGS. 2, 3, and 6, a pair of left and right vertical frames 63, 63 are erected on the front portion of the machine frame 6, and a horizontally long front support frame is provided on the upper end portion of the vertical frames 63, 63. 64 is erected.
The fertilizer applicator 2 is fixedly supported with respect to the machine frame 6 by connecting and fixing the fertilizer feeding portion 21 to the front support frame 64. The fertilizer feed unit 21, a fertilizer tank 20 provided above the fertilizer feed unit 21, a fertilizer supply tube 23 that extends downward from the lower part of the fertilizer feed unit 21, and an extension bellows at the extended end of the fertilizer supply tube 23 A groove forming device 25 communicated with the tube 24 and a soil covering body 26 for backfilling a muddy surface groove formed by the groove forming device 25 are provided.
The grooving device 25 is provided at a position that is laterally displaced in the left-right direction with respect to a lower end of a later-described medicine supply tube 33 of the medicine supply device 3 and a lower end of a later-described drop guide body 42 of the seeding device 4. It is.

As shown in FIGS. 2, 3, and 6, the grooving device 25 protrudes below the lower surface 5 </ b> A of the leveling float 5 at the rear side portion of the leveling freight 5 to form a groove on the mud surface. And is fixed to the leveling float 5.
The soil covering 26 is connected and fixed to the rear part of the groover 25, and is wider than the left and right width w 1 of the muddy surface groove formed by the groover 25, and both left and right sides of the groove of the groover 25. It is composed of a spatula-like member having a horizontal width w2.
Since this soil covering body 26 extends from the rear side of the groove producing device 25 toward the rear downward direction, the fertilizer a is supplied into the groove formed by the groove producing device 25, and then the groove is directed toward the groove. It works to push in the mud on both sides. In other words, when the groove is formed, the grooving device 25 pushes the mud left and right, so that the mud that has risen on the left and right sides of the mud surface groove is pushed forward by the cover body 26 in a downwardly lowered posture as the aircraft advances. Mud is pushed into the groove formed on the surface and backfilled.

As shown in FIGS. 2, 3, and 7, the fertilizer feeding unit 21 includes a feeding drive shaft 27 that drives a known feeding roll (not shown), and left and right ends of the drive case 60 via the drive mechanism 22. Are coupled to a transmission shaft 62 protruding from the shaft.
The drive mechanism 22 includes a crank body 22a fixed to the shaft end of the transmission shaft 62, an operation arm 22b provided on the feeding drive shaft 27, and an interlocking rod 22c that couples the crank body 22a and the operation arm 22b. Yes. Therefore, each time the transmission shaft 62 makes one rotation, the operation arm 22b is reciprocally swung within a predetermined angle range θ1, and the feeding roll is rotated in a certain direction via a one-way rotation mechanism (not shown), thereby The fertilizer is configured to be fed out in a predetermined amount.

[Drug supply device]
The drug supply device 3 for supplying a pest control drug will be described.
As shown in FIGS. 2, 4, 6, and 8, the medicine supply device 3 includes a medicine delivery portion 31, a medicine storage tank 30 provided on the upper side, and a downward extension from the lower portion of the medicine delivery portion 31. The medicine supply cylinder 33 is provided.
The medicine supply cylinder 33 is composed of an upper cylinder 33a made of a hard pipe that is continuous with the medicine feeding section 31, and a soft flexible hose that is connected to the lower end side of the upper cylinder 33a and whose lowermost end is supported by the leveling float 5. The lower cylinder 33b is provided. Therefore, when the leveling float 5 swings up and down on the front end side around the swing fulcrum x on the rear end side, the lower cylinder 33b also bends and changes due to its own flexibility.

  2, 4, 6, and 8, the drug delivery unit 31 has a transmission in which a delivery drive shaft 34 that drives a known delivery roll (not shown) projects from the left and right ends of the drive case 60. The shaft 62 is configured to be driven by being interlocked and connected via the drive mechanism 32.

The drive mechanism 32 is configured as follows. That is, as shown in FIG. 4, a crank arm 32a having one end connected to an interlocking rod 22c connected to a crank body 22a fixed to the shaft end of the transmission shaft 62 is provided, and the other end of the crank arm 32a is provided. The lower end side of the lower interlocking rod 32b is connected to the side. The upper end side of the lower interlocking rod 32b is connected and fixed to the end portion of the relay link 32d that is pivotally supported by the left and right support shaft 32c on the side far from the support shaft 32c.
The relay link 32d is connected to the lower end sides of a pair of upper interlocking rods 32e, 32e on both sides of the support shaft 32c. The upper end portions of the upper interlocking rods 32e and 32e are respectively connected to the pair of operation arms 32f and 32f provided on the feeding drive shaft 34.

Therefore, every time the transmission shaft 62 makes one revolution, the crank arm 32a also makes one revolution, and the relay link 32d reciprocally swings within the predetermined angle range θ2 in conjunction with this, and further, a pair is connected via the upper interlocking rods 32e and 32e. The operation arms 32f and 32f are also individually swung.
The pair of operation arms 32f and 32f drives the feeding drive shaft 34 in a fixed direction via a one-way rotation mechanism (not shown) and drives a feeding roll that rotates together with the feeding drive shaft 34, so that the medicine storage tank 30 The medicine b is fed out by a predetermined amount.

As shown in FIGS. 2, 4, and 6, the lower cylinder 33 b of the medicine supply cylinder 33 is fixed at a position closer to the front end side of the leveling float 5. As shown in FIG. 9, the lower end of the lower cylinder 33b is directed obliquely forward and upward from the lowermost surface of the bottom surface 5A of the leveling float 5 so as to be located slightly away from the mud surface of the field GL. It is provided in the upper part of the inclined surface portion.
And the chemical | medical agent b supplied from the lower end of the lower cylinder 33b falls on the field GL before the leveling float 5 levels, and the leveling float 5 passes on the field GL where the chemical b is fallen and supplied. Thus, as shown in FIG. 9, the medicine b is pressed together with the mud by the amount of settlement of the leveling float 5. At this time, the medicine b is pushed into the lower mud so as to be buried in the soft mud surface, and most of it is covered with mud. As a result, the medicine b is supplied in a depth position where exposure to the mud surface can be avoided.
That is, in this structure, the leveling float 5 that passes behind the drug supply point constitutes a drug embedding means for supplying the drug b so that the drug b is at a depth position where exposure to the mud surface can be avoided. ing.

From the lower end of the drop guide body 42 of the seeding device 4 located on the rear side of the supply position of the medicine b, as shown in FIGS. 6 and 9, with respect to the mud surface where the medicine b is pushed in as described above. The seed soup c is supplied in a drop manner.
As a result, the seed pod c sowed on the surface GL is supplied in a state where the seed pod c is on the upper side of the supply location of the medicine b. That is, it is possible to supply the medicine b at a position very close to the seed pod c while avoiding exposure to sunlight while seeding the seed pod c.

[Seeding equipment]
The seeding device 4 will be described.
As shown in FIGS. 2 and 5, the rear end portions of a pair of left and right transmission cases 61 that extend from both lateral ends of the drive case 60 that is long in the lateral direction of the machine frame 6 to the rear of the machine frame 6. In the vicinity, a horizontally long rear support frame 66 is attached via an upward support 65. Four seeding feeding sections 41 are connected and fixed to the rear support frame 66 in a line in the horizontal direction of the machine body, and a seeding tank 40 having four seed seed accommodating sections 40a is provided above the seeding feeding sections 41. It is supported.

The seeding feeding part 41 has a feeding roll (not shown) inside, and the feeding roll is rotationally driven in one direction by a gear transmission mechanism (not shown) built in the left and right transmission cases 61, A predetermined amount of seed soup c is intermittently fed out for every predetermined rotation amount.
In the sowing tank 40, an iron-coated seed pod c is accommodated as an example of the seed pod c, and the seed pod c is provided at the lower end of the drop guide body 42 having a channel-shaped cross section continuously provided at the lower portion of the seeding feeding portion 41. From the part, it is configured to be intermittently dropped to the lower mud surface and spotted.

As shown in FIG. 6, the drop guide body 42 is provided at a position laterally separated from the fertilizer supply groove forming device 25 in a plan view, and is provided at a lower end opening of the medicine supply tube 33 for supplying medicine. It is provided on the rear side, that is, at a rear position corresponding to the medicine supply location trace supplied from the medicine supply cylinder 33 as the machine progresses.
Accordingly, the disposition guide 42 is disposed at a position distant from the fertilizer a supply trace in the left-right direction so as to be supplied to a position immediately above the drug supply trace.

  As shown in FIGS. 2 and 8, the rear support frame 66 is extended with a support arm 67 having an L shape in side view on the front side. The above-mentioned medicine delivery unit 31 of the medicine supply device 3 is fixed to the upward extending end of the support arm 67. A support shaft 32c of the relay link 32d is provided in the vicinity of the bent portion bent in an L shape.

[Direct sowing method]
A direct seeding method that is configured as described above and performs direct seeding work using a direct seeding machine will be described.
As shown in FIGS. 6, 9, and 12 (a) and 12 (b), in the medicine supply step of supplying the pest control medicine b, the medicine b fed from the medicine feeding section 31 is used as the medicine supply cylinder 33. Is moved to the front end side of the leveling float 5 so as to fall on the surface GL before the leveling float 5 is leveled.

And the medicine b dropped and supplied on the field GL before the leveling float 5 is leveled from the position closer to the front end of the leveling float 5 positioned above the field level GL passes through the drug supply position. Hold down with mud using the float 5 for leveling. As a result, as shown in FIGS. 9 and 12 (a), the drug b is pushed into the lower mud so as to be buried in the soft mud surface, and most of it is covered with mud.
That is, when the leveling float 5 passes through the portion to which the medicine b is supplied, the leveling float 5 acts as a medicine embedding means for pushing the medicine b into the mud and embedding it, and pushes it into the mud. The granulated drug b is pushed by the leveling float 5 and the granule group expands in the horizontal direction for a while, so that the whole or most of the surface is covered with mud and is not directly exposed to sunlight. It will be in a state to get. As a result, the medicine b is supplied in a depth position where exposure to the mud surface can be avoided.

And in the sowing process of directly sowing seed pod c, as shown in FIG. 6, FIG. 9, and FIGS. 12 (a) and (b), the surface GL is set to a depth position where exposure to the mud surface can be avoided. The seed meal c guided to drop by the drop guide body 42 of the seeding device 4 is intermittently supplied immediately above the row of the medicines b supplied in a row.
As a result, the seed pod c sowed on the surface GL is seeded on the upper side of the supply location of the medicine b supplied in a row in a state of being spotted at predetermined intervals.
In this state, the supply position of the medicine b supplied in the medicine supply process with respect to the rice field GL is lower than the supply position of the seed potato c with respect to the rice field GL in the seeding process.

In the fertilizer supply process for supplying the fertilizer a, as shown in FIG. 6 and FIGS. 12 (a) and 12 (b), the grooving device 25 is connected to the lower end of the medicine supply cylinder 33 and the drop guide body 42 of the seeding device 4. By being provided at a position shifted laterally in the lateral direction with respect to the lower end, the row of the fertilizer a to be supplied is the row of the supplied medicine b or the seeded seed c. Misaligned laterally with respect to the column.
That is, in this state, the row of the supplied fertilizer a is located farther than the row of the supplied medicine b with respect to the sowing position, and the fertilizer a is pest control in the growing process of rice. It will act later than the drug b for use.

[Other Embodiment 1]
In the embodiment, the structure in which the leveling float 5 is used as the medicine embedding means is illustrated, but the present invention is not limited to this.
For example, as shown in FIG. 10, a grooving plate-like member 35 made of a narrow plate-like body extending downward from the lower surface 5 </ b> A of the leveling float 5 on the lower surface 5 </ b> A side of the leveling float 5. The medicine b may be supplied from the medicine supply cylinder 33 by dropping into a medicine supply groove formed by the plate-like member 35.
If comprised in this way, the chemical | medical agent b can be supplied to the position a little deeper than the bottom face 5A of the leveling float 5, and possibility that the chemical | medical agent b will be exposed to a mud surface can be reduced more.

Also, as shown in the figure, a backfill covering 36 is provided on the rear end side of the leveling float 5 so that the groove formed by the plate member 35 for grooving is backfilled after supplying the medicine. By doing so, the possibility that the chemical b is exposed to the mud surface can be reduced more reliably.
Then, if seed sowing c is sowed after being backfilled with the covering soil 36, the seed sowing c can be seeded on the surface at a position directly above the row of the drug supply locations. In this case, as shown in FIG. 14 (a), the seed potato c is supplied in a state where a gap d1 is slightly opened between the medicine supply location and the seeding position immediately above.
Other configurations may be the same as those in the above-described embodiment.

[Second embodiment]
In the embodiment, the leveling float 5 and the plate member 35 for grooving attached to the leveling float 5 are exemplified as the drug embedding means. However, the present invention is not limited to this. It is not something that can be done.
That is, although not shown in the drawing, a medicine groover similar to the groover 25 used in the fertilizer device 2 is provided separately from the fertilizer groover 25, and the medicine groover is provided as a medicine supply cylinder 33. It may be provided at the lower end of the fertilizer and the medicine may be supplied at a location different from the fertilization position.
In this case, although the arrangement depth with respect to the rice field GL of the groover for drug application can be determined arbitrarily, the drug b may be exposed to the mud surface at a shallower position closer to the sowing position than the fertilization position. It is desirable to set to a position with less. In addition, it is desirable to provide a covering body for backfilling the groove formed by the medicinal groover on the rear side of the medicinal groover.

Furthermore, although not shown, there is a drug b that is exposed to the mud surface at the supply site of the drug b for pest control, which does not have a function as a leveling float 5 or a function as a medicine groover. It is also possible to provide a dedicated presser body that presses the mud surface to the lower side so as to shift to a supply position with a depth that can prevent the medicine b from being exposed to the mud surface. In this case, even if the medicine b is pressed together with the mud with a dedicated pressing body, a groove is not formed, so that a covering soil for backfilling is unnecessary.
Other configurations may be the same as those in the above-described embodiment.

[3 of another embodiment]
In the embodiment, the structure in which the medicine supply position and the fertilization position are separated from each other is illustrated, but the present invention is not limited to this.
For example, as shown in FIG. 11, the medicine supply cylinder 33 is connected to the fertilizer supply cylinder 23 in the middle of the dropping path, and the medicine b fed from the medicine feeding section 31 is fed with the fertilizer a fed from the fertilizer feeding section 21. You may comprise so that it may merge.
When comprised in this way, the chemical | medical agent supply apparatus 3 side can also perform chemical | medical agent supply using the grooving device 25 and the covering soil body 26 of the fertilizer application apparatus 2, without requiring a special chemical | medical agent embedding means.
When fertilizing, applying, and sowing using the direct sowing machine having the structure shown in FIG. 11, as shown in FIG. 17, the fertilizing position and the medicine supply position exist at the same location away from the sowing position. Become.
Other configurations may be the same as those in the above-described embodiment.

[4 of another embodiment]
In the embodiment, the case where the supply medicine supplied in the medicine supply process by the medicine supply device 3 is supplied in a row is illustrated, but the present invention is not limited to this.
For example, as shown in FIG. 13, the medicine b is intermittently supplied so that the medicine supply places exist in a dotted shape, and the spot-like medicine supply places and the seed potato c supply places match. You may make it carry out sowing at the timing of sowing. In this case, there exists an advantage which can reduce the usage-amount of the chemical | medical agent b.
Other configurations may be the same as those in the above-described embodiment.

[5 of another embodiment]
In the embodiment, the example in which the supply position of the medicine b is set directly below the seeding position is shown, but the present invention is not necessarily limited thereto.
For example, as shown in FIG. 15 or FIG. 16, the supply position of the medicine b may exist between the seed sowing position of the seed potato c and the supply position of the fertilizer a in a plan view.
In this case, in the case shown in FIG. 15, the seed sowing position of the seed potato c, the supply position of the fertilizer a, and the supply position of the medicine b are supplied in a linear manner. For this reason, the interval d1 between the sowing position of seed pod c and the supply position of medicine b is inevitably shorter than the interval d2 between the sowing position of seed pod c and the supply position of fertilizer a. Compared to the case shown in FIG. 16, the distance d1 between the seed sowing position of the seed pod c and the supply position of the medicine b is further shorter than the distance d2 between the sowing position of the seed pod c and the supply position of the fertilizer a.
Note that the interval d1 between the seed sowing position of the seed pod c and the supply position of the medicine b is also shorter than the interval d2 between the sowing position of the seed pod c and the supply position of the fertilizer a, as shown in FIG.
Other configurations may be the same as those in the above-described embodiment.

[6 of another embodiment]
In the embodiment, an example in which one wide grading float 5 is provided has been described, but a plurality of narrow grading floats may be provided in place of one wide grading float 5.
Other configurations may be the same as those in the above-described embodiment.

[7 of another embodiment]
The pest control agent used in the embodiment may be an insecticide, a fungicide, or both. In addition, it may be a pest repellent to prevent the pests from coming, even if it has no insecticidal effect. In short, it may be a drug b that has a pest control effect on the pests c and seedlings during the growth process. That's fine.

[8 of another embodiment]
In the embodiment, an example in which an iron-coated seed pod is used as a seed pod sowed by the seeding device 4 or a seed pod sowed in the seeding step is not limited to this. For example, a seed jar coated with calper coating is used. May be.

[9 of another embodiment]
The fertilizer application apparatus 2, the chemical supply apparatus 3, the fertilization process, and the chemical supply process shown in the embodiment are not limited to direct seeding, and may be used for seedling planting, for example. It can be applied to a system work device.

  The present invention can be used for a direct sowing machine equipped with a 4-row paddy field work device A, a direct sowing machine equipped with 5 or more paddy field work devices A, or a 2-row or 3-row direct seeding machine. It is.

2 Fertilizer 3 Drug supply device 4 Seeding device 5 Drug placement means (presser, float for leveling)
25 Common grooving device a Fertilizer b Pest control agent c Seed pod d2 Predetermined interval GL Taba

Claims (17)

A seeding device for directly sowing seed pods on a paddy field and a drug supply device for supplying a pest control drug,
A direct sowing machine provided with a medicine embedding means for supplying the medicine for pest control with the medicine supply apparatus so that the supply position of the medicine to the surface is a depth position where exposure to the mud surface can be avoided.   The direct seeding machine according to claim 1, wherein the medicine embedding means is configured so that the supplied medicine is positioned lower than the supply position of the seeding device with respect to the rice seed surface.   A fertilizer supply device for supplying fertilizer is further provided, and a supply position of the chemical for pest control by the chemical embedding means with respect to the rice field is supplied at a predetermined distance from a supply position with respect to the rice seed surface by the seeding device. The direct sowing machine according to claim 1 or 2, wherein the direct sowing machine is closer to a supply position of the seed fertilizer to the rice field by the seeding device than a supply position of the fertilizer by the fertilizer application.   The supply position to the rice field of the pest control agent by the chemical embedding means is set between the supply position of the seed pod to the rice field by the seeding device and the supply position of the fertilizer supply device to the rice field. 3. Direct seeding machine according to 3.   The direct sowing machine according to any one of claims 1 to 4, wherein a supply position of the seed pod to the rice field by the seeding device is a position immediately above the supply position of the chemical embedding means for the pest control agent to the rice field.   The chemical embedding means includes a pressing body that presses the pest control chemical that is exposed to the mud surface at the supply site of the pest control chemical by the chemical supply device, so that the pest control chemical is exposed to the mud surface. The direct seeding machine according to any one of claims 1 to 5, wherein the direct seeding machine is configured to shift to a supply position having a depth that can avoid the above.   The direct sowing machine according to claim 6, wherein the presser body is configured by a leveling float that is mounted so that a relative vertical position can be changed with respect to the traveling machine body.   The drug embedding means includes a groover for supplying a pest control drug into the soil below the mud surface, and a covering body for refilling the groove formed by the groover. Item 5. The direct seeding machine according to any one of Items 1 to 4.   The direct sowing machine according to claim 3 or 4, wherein the fertilizer supplied from the fertilizer application and the supply pest-control chemical supplied from the chemical supply apparatus are combined and supplied from a common grooving device. A seeding process for directly sowing seed pods on a paddy field and a chemical supply process for supplying a pest control chemical,
A direct sowing method in which the supply position of the chemical for controlling insects and pests in the chemical supply step with respect to the paddy surface is a depth position where exposure to the mud surface can be avoided.   The direct sowing method according to claim 10, wherein a supply position of the medicine supplied in the medicine supply step with respect to the rice field is lower than a supply position with respect to the rice seed surface in the seeding step.   A fertilizer supply step for supplying fertilizer is further provided, and a supply position of the chemical for controlling pests in the chemical supply step with respect to the rice field is supplied to a position separated from a supply position with respect to the rice seed surface by the seeding step at a predetermined interval. The direct sowing method according to claim 10 or 11, wherein the direct sowing method is a position closer to a supply position for the seed surface of the seed pod by the sowing step than a supply position for the fertilizer by the fertilizer supply process.   The supply position with respect to the rice field of the pest control agent by the said chemical | medical agent supply process is set between the supply position with respect to the rice field of the seed pod by the said sowing process, and the supply position with respect to the rice field by the fertilization process which supplies fertilizer. The direct sowing method described.   The direct sowing method according to any one of claims 10 to 13, wherein a supply position of the seed pod to the rice field by the sowing step is a position immediately above the supply position of the chemical for controlling diseases and insects to the rice field by the chemical supply process.   In the chemical supply step, after the pest control chemical is supplied to the mud surface, the pest control chemical that is exposed on the mud surface is pressed from the upper side to the paddy side so that exposure to the mud surface can be avoided. The direct sowing method according to any one of claims 10 to 14, wherein the direct seeding method is shifted to the supply position.   In the chemical supply step, the pest control chemical is supplied to a groove formed on the surface of the rice field, and then the groove is refilled to supply the pest control chemical into the soil below the mud surface. The direct seeding method as described in any one of 10-14.   The direct sowing method according to claim 12 or 13, wherein the fertilizer supplied in the fertilization supply step and the supply pest-controlling agent in the chemical supply step are combined during supply and supplied to a common position.

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