JP4448786B2 - Medicine spreader - Google Patents

Description

  The present invention relates to a technique of a drug spreader that places a seedling mat on a seedling mount of a rice transplanter and applies a medicine onto the seedling mat simultaneously with transplanting of the seedling.

2. Description of the Related Art Conventionally, a box application agent is known which sprays a granule having osmotic transfer properties on a seedling box just before rice planting to eliminate pests that are generated soon after transplanting. The box application agent can control most of the major pathogens occurring before heading by a single chemical treatment.
Recently, a long-lasting box application agent that can suppress the occurrence of pests, leaf potatoes, blight, etc. occurring after the middle of rice cultivation has also appeared.

However, it is very troublesome to carefully spray a predetermined amount of medicine on the nursery box by hand spraying just before busy rice planting, so it was processed in large quantities using a power spreader. In the drug spraying using such a power spreader, it is difficult to spray the drug uniformly.
Therefore, as described in Patent Document 1, the present applicant mounts a drug spreader above the seedling stage of the rice transplanter, spreads the drug on the seedling mat by the drug spreader, and applies the medicine simultaneously with the rice planting. A work machine that can be used is proposed.

In addition, in a chemical spreader, the tip of the spray nozzle, which is a spraying body, extends to the vicinity of the floor soil of the seedling mat, and the seedling is divided and applied to the seedling mat. There was a risk that the inside of the spray nozzle was moistened and the drug was fixed inside the spray nozzle.
Therefore, as described in Patent Document 2, the present applicant, at the tip of the spray nozzle connected downstream of the feeding portion, a cylindrical cover having an inner diameter larger than at least the outer diameter of the spray nozzle, A drug spreader that is fitted in a state protruding from the tip of the spray nozzle is proposed.
JP 2002-027895 A JP 2003-088291 A

The medicine spreader described in Patent Document 2 can prevent water droplets adhering to a normal seedling grown to a height from adhering to the tip of the spray nozzle, but the tip of the seedling with a low height The part may enter the inside of the cylindrical cover and contact the tip of the spray nozzle, and water droplets attached to the seedling may stick to the tip of the spray nozzle. In addition, in the case of work in the rain, rainwater adhering to the nozzles drip from the lower end of the nozzle, so that the rainwater wraps inward from the lower end of the nozzle and the drug may adhere.
In the present invention, in view of the above situation, regardless of the height of the seedling to be handled, the inside of the spray nozzle is moistened by water droplets or the like adhering to the seedling or the seedling mat, and the medicine is fixed inside the spray nozzle. It is an object of the present invention to provide a chemical spreader that can prevent scraping and can be scraped off by a scraper even if it adheres.

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

That is, in claim 1, in a drug spreader that places a seedling mat on a seedling stage of a rice transplanter, disposes a drug spreader above the seedling stage, and dispenses the seedling mat simultaneously with transplantation,
A cylindrical rotating body is rotatably fitted around the tip of the spray nozzle connected to the lower part of the feeding part of the medicine spreader, and a contact member that comes into contact with the rotating body is provided on the seedling stage,
A scraper projecting from the rotating body and extending on the inner surface of the tip of the spray nozzle is provided.

In claim 2, the seedling mat is placed on the seedling stage of the rice transplanter, the drug spreader is disposed above the seedling stage, and the drug spreader applies the seedling mat simultaneously with transplantation.
A cylindrical rotating body is rotatably fitted around the tip of the spray nozzle connected to the lower part of the feeding part of the medicine spreader, and a plurality of protrusions are provided on the outer periphery of the rotating body to contact the seedling mat seedling. As well as possible
A scraper projecting from the rotating body and extending on the inner surface of the tip of the spray nozzle is provided.

  According to a third aspect of the present invention, a plurality of the scrapers are provided.

  According to a fourth aspect of the present invention, a scraper is provided so as to protrude from the outer periphery of the tip of the spray nozzle and extend so as to contact the inner periphery of the tip of the rotating body.

  According to a fifth aspect of the present invention, a plurality of the scrapers are provided.

  According to a sixth aspect of the present invention, the spray nozzle is provided so that its position can be adjusted.

  According to a seventh aspect of the present invention, the spray nozzle is disposed so as to be inclined at an angle between the vertical direction and the direction perpendicular to the installation surface of the seedling table in a side view.

  In Claim 8, the cover which covers the upper part of the said rotary body is provided.

  As effects of the present invention, the following effects can be obtained.

  In claim 1, at the same time as the medicine is sprayed at the time of transplantation, the seedling stage reciprocates left and right, and when this reciprocating motion, the rotating body rotates in contact with the abutting member, and this rotation rotates the tip of the spray nozzle Mud and chemicals adhering to the surface can be scraped off by a scraper. Moreover, clogging of the spray nozzle can be prevented. And since the power for rotating a rotary body is unnecessary, a structure can be simplified. In this case, since it can be forcibly driven by the contact member, it can be reliably rotated even if dust or the like is clogged in the rotating portion of the rotating body.

  In claim 2, at the same time as the drug is sprayed at the time of transplantation, the seedling stage reciprocates left and right, and when this reciprocating movement, the protrusion provided on the rotating body abuts on the seedling of the seedling mat, Mud and chemicals adhering to the tip of the spray nozzle due to rotation can be scraped off by a scraper. Moreover, clogging of the spray nozzle can be prevented. And since it is not necessary to provide the power for rotating a rotary body, or the member for rotating in a seedling mounting stand, a structure can be simplified.

  According to the third aspect of the present invention, even if the rotational speed of the rotating body is not large, that is, even if the rotation angle is small, the scraper can slidably contact the entire circumference of the spray nozzle and leave the inner periphery of the spray nozzle. Can be cleaned without any problems.

  According to the fourth aspect of the present invention, even when the medicine adheres to the inner periphery of the tip of the rotating body, the rotating body rotates as described above, so that the medicine or mud adhered by the scraper can be scraped off. The clogging of the rotating body and the tip of the spray nozzle can be prevented.

  According to the fifth aspect, even if the rotation angle of the rotating body is small, mud and chemicals attached to the inner periphery of the tip of the rotating body can be removed.

  In claim 6, even if the seedling mat has different seedling lengths, the position of the rotating body can be adjusted according to the length of the seedling, so that the rotating body is reliably rotated. The position can be adjusted as described above, and the medicine can be reliably sprayed.

  In claim 7, the medicine can be reliably dropped from the spray nozzle and dropped onto the seedling stock on the seedling mat, and the rotating body can be reliably rotated by the lateral movement of the seedling mat. Thus, the seedling can be prevented from being damaged by the rotating body.

  According to the eighth aspect of the present invention, rain falling from above the rotating body travels along the umbrella-shaped cover above the rotating body and falls outside the rotating body, so that rainwater enters the inside from the upper part of the rotating body. Can be prevented. That is, it is possible to prevent rainwater from entering between the rotating body externally fitted to the spray nozzle and reaching the lower end of the spray nozzle, so that the medicine adheres to the lower end or is clogged.

Next, embodiments of the invention will be described.
FIG. 1 is a side view showing the overall configuration of a riding rice transplanter 100 according to an embodiment of the present invention, FIG. 2 is a side view showing the rear portion of the riding rice transplanter 100, and FIG. 4 is a side view showing the medicine sprayer 140, FIG. 5 is a plan view showing the spray nozzle 65, FIG. 6 is a sectional view showing the first embodiment of the rotating body 66, and FIG. FIG. 8 is a cross-sectional front view showing a state in which the rotary body 66 in the first embodiment is externally fitted to 65, and FIG. 8 is a cross-sectional front view showing a state in which the rotary body 66 b in the second embodiment is externally fitted to the spray nozzle 65. 9 is a side view showing how the rotating body 66b contacts the seedling 75, FIG. 10 is a partially sectional side view showing the state where the upper part of the rotating body 66b is covered with the cover 15, and FIG. 11 shows the upper part of the rotating body 66b. It is a partial cross section side view which shows the state covered with the substantially elliptical cover 15 in planar view. That.

Below, the whole structure of the riding rice transplanter 100 which comprises the chemical spreader 140 which is one Embodiment of the chemical spreader of this invention is demonstrated using FIG.1, FIG.2 and FIG.3.
In addition, the chemical spreader and the seedling platform according to the present invention can be widely applied to rice transplanters, and the application range is not limited to the riding rice transplanter 100 of the present embodiment. Here, the “rice transplanter” refers to a machine for planting rice seedlings in a paddy field, and includes both a riding rice transplanter operated by an operator and a walking rice transplanter operated by an operator by hand.
In the following description, the direction of the arrow A in FIG. 1 is defined as “front” for convenience.

The riding rice transplanter 100 is an embodiment of the rice transplanter, and the planting unit 4 is disposed at the rear of the traveling unit 1 via the lifting link mechanism 27.
The traveling unit 1 has an engine 2 mounted on the front upper portion of the vehicle body frame 3 and supports the front wheels 6 through the front axle case at the lower front portion. Further, the traveling unit 1 supports the rear wheel 8 via the rear axle case 7 at the rear part. The engine 2 is covered with a bonnet 9.

The riding rice transplanter 100 arranges steering handles 14 on a dashboard 5 provided at the rear of the hood 9, and covers the left and right sides of the bonnet 9 and the upper surface of the body frame 3 at the rear of the hood 9 with a body cover 12. Yes.
The riding rice transplanter 100 arranges the seat 13 behind the steering handle 14, and the operator puts his / her feet on the left and right sides of the hood 9, the front of the seat 13, the left and right sides of the seat 13, and the rear of the seat 13. .

  The riding rice transplanter 100 is provided with a traveling speed change lever 30, a planting lifting / lowering and sub-shifting lever 31 for work traveling speed change, a planting sensitivity adjusting lever, and the like on the side of the seat 13. The riding rice transplanter 100 is provided with a main clutch pedal 32 and left and right brake pedals on a step below the dashboard 5. Further, the riding rice transplanter 100 has a fertilizer applicator 33 disposed behind the seat 13.

The planting unit 4 includes a seedling stage 16, a planting claw 17, a float 34, and the like. The seedling mounting table 16 is disposed in a front and rear low position, and the lower portion of the seedling mounting table 16 is supported by the lower guide rail 18 and the upper portion of the front surface of the seedling mounting table 16 is supported by the upper guide rail 19 so as to be slidable in the left-right direction. The lower guide rail 18 and the upper guide rail 19 are supported from the planting center case 20 via a frame or the like.
The planting case 21 protrudes rearward from the planting center case 20 in parallel via a connecting pipe. A rotary case 22 that rotates in one direction is provided at the rear portion of the planting case 21, and a pair of planting claws 17 and 17 are provided on both the left and right sides of the rotary case 22.
Thus, the riding rice transplanter 100 reciprocates (slids) the seedling table 16 left and right by the lateral feed mechanism as it travels forward, and drives the planting claws 17 and 17 in synchronism with this reciprocating motion. The seedlings are cut out and planted continuously.

  In addition, the raising / lowering link mechanism 27 is connected with the front part of the planting center case 20 via a rolling fulcrum shaft. The elevating link mechanism 27 includes a top link 25, a lower link 26, and the like, and elevates and lowers the planting unit 4 by an elevating cylinder 28 disposed below the seat 13.

As shown in FIGS. 1, 2 and 3, ribs 85, 85... 86... Are formed. The seedling mat 74 mounted on the seedling mat mounting portion 86 provided between the adjacent ribs 85 and 85 corresponds to one line.
The vertical feed mechanism of the seedling mat 74 includes a driven roller 37, a drive roller 38, a seedling feed belt 35, and the like. An opening is provided from the lower portion of the seedling mat placing portion 86 to the middle position in the vertical direction, and a driven roller 37 and a driving roller 38 are provided above and below the opening, and a seedling feeding belt is provided between the driven roller 37 and the driving roller 38. 35 is wound. A large number of protrusions are provided on the surface of the seedling feeding belts 35, 35..., And the belt surface is exposed from an opening provided from the lower portion of the seedling mat placing portion 86 to the upper and lower intermediate positions. While holding the seedling mat 74 with the seedling mat presser mechanism 36 and the seedling feeding belt 35 provided above the vertical feeding mechanism of the seedling mat 74, the seedling 75 is accurately vertically fed downward to perform stable planting.

The bottom end of the seedling mat 74 was cut by a predetermined width by the reciprocating motion of the seedling stage 16 and the cutting operation of the seedling 75 performed by the planting claws 17, 17... In synchronization with the reciprocating motion. The seedling mat 74 is conveyed downward and planted in a paddy field. The seedling mat 74 is conveyed downward by the seedling feeding belt 35 of the vertical feeding mechanism when the seedling mounting table 16 is folded back at the left and right ends.
At the time of this planting operation, the medicine is applied simultaneously by the medicine spreader 140 of the present invention, and the reliable application without dispersion unevenness is performed.

Below, the detailed structure of the chemical spreader 140 is demonstrated using FIG.1, FIG.2, FIG.3 and FIG.
As shown in FIGS. 1 and 2, the drug spreader 140 is provided above the seedling mounting table 16 of the riding rice transplanter 100 and applies the seedling mat 74 simultaneously with the transplanting of the seedling 75. More precisely, the medicine spreader 140 is arranged to face the seedling mat mounting portion 86 of the seedling mounting table 16. The drug handled by the drug spreader 140 is mainly a powder raw material formed into a granular shape, but can be applied to other granular drugs (for example, a granular drug whose surface is coated). is there.

In the riding rice transplanter 100 according to the present embodiment, one medicine spreader 140 is arranged at the upper left and right centers of the two seedling mat placing portions 86 and 86. This is to make it possible to apply medicines to the two seedling mat placing portions 86 and 86 with a single medicine spreader 140. Therefore, the medicine spreader 140 of the present embodiment can be applied to the seedling mats 74 corresponding to all the strips as long as the number of the strips to be planted by the applied rice transplanter is half.
However, one medicine spreader 140 may be arranged above one seedling mat placing portion 86, and one medicine spreader 140 may be configured to apply medicine to one seedling mat placing portion 86. Not what you want.

As shown in FIG. 4, the medicine spreader 140 is mainly composed of a medicine hopper 41, a feeding section 42, a transport section 43 and the like.
The drug hopper 41 is a container for storing a drug to be applied to the seedling mat 74. A lid 41 a is provided on the top of the medicine hopper 41. The lid 41a is opened to replenish the medicine in the medicine hopper 41. The lower half of the medicine hopper 41 has a funnel shape, and an opening is provided at the lower end. The medicine stored in the medicine hopper 41 falls by its own weight to the feeding section 42 below the opening provided at the lower end of the medicine hopper 41.

The feeding unit 42 feeds the medicine stored in the medicine hopper 41 by a predetermined amount. The feeding portion 42 of this embodiment is mainly composed of a feeding case 47, a feeding roll 45, a roll shaft 49, and the like.
The feeding case 47 is a box-shaped member whose upper and lower surfaces are open, and accommodates the feeding roll 45 therein. The internal space of the feeding case 47 is partitioned into an upper half and a lower half with the feeding roll 45 interposed therebetween. The feeding case 47 is connected to the lower end portion of the medicine hopper 41.
Therefore, the medicine dropped from the medicine hopper 41 is filled in the upper half space of the feeding case 47.

The feeding roll 45 is a substantially cylindrical member, and a plurality of grooves are provided on the outer peripheral surface thereof. The longitudinal direction of the groove substantially coincides with the longitudinal direction (axial direction) of the roll shaft 49 that penetrates both end faces of the feeding roll 45.
The roll shaft 49 is a shaft for pivotally supporting the feeding roll 45 inside the feeding case 47 so as to be rotatable. The roll shaft 49 penetrates the feeding roll 45, and both ends of the roll shaft 49 protrude from the left and right side surfaces of the feeding case 47. By rotating the roll shaft 49, the feeding roll 45 accommodated in the feeding case 47 can be rotated.

A part of the medicine filled in the upper half space of the feeding case 47 is in contact with the outer peripheral surface of the feeding roll 45, and a part thereof is accommodated in a groove provided on the outer peripheral surface of the feeding roll 45. The
When the feeding roll 45 is rotated, only the medicine accommodated in the groove of the feeding roll 45 moves to the space in the lower half of the feeding case 47 and falls downward from the groove. That is, the medicine stored in the medicine hopper 41 is delivered by the delivery section 42.
In addition, it is possible to select suitably the quantity of the chemical | medical agent delivered by changing the number of grooves provided in the delivery roll 45, length, depth, and width. However, the feeding portion 42 can be configured as a pan-eye type or the like.

  As shown in FIG. 4, the transport unit 43 is connected to the feeding unit 42, transports the medicine fed by the feeding unit 42, and applies the seedling mat 74. The transport unit 43 is mainly composed of a branch member 61, guide tubes 64 and 64, spray nozzles 65 and 65, rotating bodies 66 and 66, and the like.

  The branch member 61 is a substantially funnel-shaped member provided in the opening on the lower surface of the feeding case 47. An opening is provided on the upper surface of the branch member 61, and two openings are provided on the left and right of the lower end. The medicine that has been fed out by the feeding portion 42 and dropped into the branching member 61 is distributed substantially evenly to the two openings provided at the lower end of the branching member 61.

  The upper ends of the guide tubes 64 and 64 are connected to the two openings provided at the lower end of the branch member 61, and the medicine distributed evenly to the two openings by the branch member 61 as described above. Slide down in the corresponding guide tubes 64 and 64 respectively.

As shown in FIGS. 2 and 4, the guide cylinders 64 and 64 are cylindrical members, and their upper ends are bolted to the lower ends of the branch members 61 and their substantially central portions are bolted to the lower horizontal frame 53d.
When the bolts are fixed to the lower horizontal frame 53d, the guide cylinders 64 and 64 are oriented such that the upper ends of the guide cylinders 64 and 64 face rearward and upward, and the lower ends of the guide cylinders 64 and 64 face forward and downward. It is determined so as to face, that is, toward the lower part of the seedling stage 16.

Next, the detailed structure of the support frame 53 is demonstrated using FIG. 2 and FIG.
The support frame 53 is a member that fixes the drug spreader 140 to the riding rice transplanter 100. The support frame 53 mainly includes a base frame 53a, support pillars 53b, an upper horizontal frame 53c, a lower horizontal frame 53d, and the like.
The base frame 53 a is a member that forms the lower part of the support frame 53, and is fixed to the rear part of the planting case 21. The support column 53b is a substantially prismatic member, and a lower end portion thereof is fixed to the base frame 53a. The support column 53b is held in a posture in which the upper end portion is substantially above the planting case 21.

The upper horizontal frame 53c is a substantially prismatic member that is provided horizontally on the upper end of the support column 53b. It is possible to further improve the rigidity of the support frame 53 by connecting the upper horizontal frames 53c and 53c respectively corresponding to the adjacent drug spreaders 140 and 140 with a connection frame or the like (not shown).
The lower horizontal frame 53d is a rod-like member provided in the middle of the support column 53b, and the spray nozzles 65 and 65 are fixed to the left and right ends, respectively.
The stays 50 and 50 are members that project forward and upward from the upper horizontal frame 53c, and the feeding cases 47 and 47 of the medicine spreader 140 are fixed to the stays 50 and 50, respectively.

Next, the spray nozzle 65 and the rotating body 66 will be described.
As shown in FIG. 4, the spray nozzle 65 is a substantially cylindrical member having an outer diameter substantially the same as the inner diameter of the guide cylinder 64. The spray nozzle 65 is slidably inserted into the guide cylinder 64 and fixed to the guide cylinders 64 and 64 by fixing screws 64a screwed on the outer peripheral surfaces of the guide cylinders 64 and 64. With this configuration, the amount of protrusion of the spray nozzle 65 from the lower end portion of the guide tube 64 (in other words, the distance between the tip end portion (lower end portion) of the spray nozzle 65 and the seedling mat 74) can be adjusted. The contact member 62 described later can be adjusted so that the rotating member 66 (specifically, the high frictional resistance member 73) or the seedling 75 can easily contact the rotating member 66b (specifically, the protrusions 67, 67,...). can do.

  As shown in FIG. 5, the spray nozzle 65 according to the present invention is a cylindrical member, and a small diameter portion 65 a for fitting a bearing member (bush) 63 is formed on the outer periphery of the lower end. A constricted portion 65b is formed below the small-diameter portion 65a, and as will be described later, a rotating body 66 that also serves as a cover is rotatably fitted to the bearing member 63, and the locking ring 72 is constricted to the constricted portion 65b. It is externally fitted to prevent it from coming off.

Next, a first embodiment of the rotating body 66 fitted around the spray nozzle 65 will be described with reference to FIGS.
The rotating body 66 is a cylindrical member, and is composed of a steel pipe or a resin pipe. Preferably, a high friction resistance member 73 such as rubber, sponge, or foamed resin is attached to the outer periphery, and a contact member 62 described later. It is comprised with the member which does not produce slip between. It is preferable that the tip end (lower end) is expanded in a trumpet shape.

  The upper inner diameter of the rotator 66 is slightly larger (the thickness of the bearing member 63) than the outer diameter of the lower end of the spray nozzle 65, and the rotator 66 has a bearing member 63 at the tip of the spray nozzle 65 as shown in FIG. It is installed so that it can rotate freely. At this time, the distal end portion of the rotating body 66 protrudes beyond the distal end portion of the spray nozzle 65. Therefore, even if rain, dew, or the like adheres to the outer periphery of the rotator 66, the medicine is prevented from adhering to the outer periphery of the spray nozzle 65 due to its moisture and preventing the medicine from adhering to the outer periphery of the spray nozzle 65.

  The lower inner diameter of the rotating body 66 is configured to be larger than the outer diameter of the lower end of the spray nozzle 65 so that a predetermined gap is formed. In this way, even if moisture adheres to the outer periphery of the rotator 66, the tip of the rotator does not reach the tip of the spray nozzle 65, and the drug prevents the moisture from adhering to the periphery of the spray nozzle 65 due to the moisture. And the front-end | tip part of the rotary body 66 is arrange | positioned in the position close | similar to the seedling mat 74 mounted in the seedling mat mounting part 86 which is the object of a medicine, and the seedling 75 on the seedling mat 74 divided by the rotary body 66 is used. I am trying to apply the medicine to the root part.

  A scraper 69 that extends to the inner periphery of the tip of the spray nozzle 65 is provided below the rotating body 66. That is, one end of the scraper 69 is fixed at an arbitrary position on the lower outer periphery of the rotating body 66 by a fixing means such as a bolt 68. However, the fixing position may be fixed to the lower end surface of the rotating body 66 that does not interfere with the contact with the contact member 62 described later, and the fixing means is not limited, and even if welding, Alternatively, the scraper 69 may be integrally formed and the scraper 69 protrudes from the rotating body 66.

  The scraper 69 is configured to be substantially U-shaped or bent so that the other end of the scraper 69 can slide in contact with the inner periphery of the tip of the spray nozzle 65. In the present embodiment, only one scraper 69 is provided, but two or more scrapers 69 can be disposed on the outer periphery of the rotating body 66.

  As shown in FIGS. 2 and 3, the upper surface of the frame (ribs 85 and 85) of the seedling table 16 has a rod shape with a predetermined length (a length that the rotating body 66 contacts and rotates one or more times). Contact members 62 and 62 are provided in the horizontal direction, and the outer peripheral surface of the rotating body 66 when the seedling stage 16 is positioned at the rightmost or left side when the seedling stage 16 reciprocates left and right. Is configured to contact the upper side or the lower side of the contact member 62. That is, when the seedling stage 16 reciprocates left and right, the outer periphery (the high frictional resistance member 73) of the rotating body 66 comes into contact with the contact member 62 and is caused by friction between the two. The rotating body 66 is configured to rotate with respect to the spray nozzle 65.

The height of the abutting members 62 and 62 is adjusted so that the rotating body 66 rotates well even when the spray nozzle 65 is slid with respect to the guide tube 64 to adjust the height according to the length of the seedling 75 of the seedling mat 74. It is preferable to correspond to the height of the seedling 75 that may be planted by the riding rice transplanter 100 so as to move.
If the spray nozzle 65 is disposed at a right angle to the seedling table 16, the seedling table 16 reciprocates left and right in a state where the spray nozzle 65 is at a right angle to the seedling table 16. The contact with the upper seedling is reduced as much as possible, and the medicine can be sprayed without damaging the seedling 75.

In this embodiment, as shown in FIG. 3, the abutting members 62 and 62 are fixed to the substantially right and left ends on the seedling table 16. However, the rod-shaped member is passed from the left end to the right end on the seedling table 16. It may be a simple configuration. In that case, since the rotating body 66 is always in contact with the rod-like member, the rotating body 66 always keeps rotating with respect to the spray nozzle 65.
In this embodiment, as shown in FIG. 3, the contact members 62 and 62 are fixed on the seedling mounting table 16, but they may be fixed on the seedling mounting table 16 side such as the seedling mat presser mechanism 36. Good, not limiting. Further, in order to further rotate the rotating body 66, teeth (pinions) like gears are formed on the outer periphery of the rotating body 66, and the contact member 62 is constituted by a rack, and the rack and the pinion are engaged with each other. Also, it can be configured so that it can be reliably rotated in accordance with the reciprocation of the seedling stage 16.

In this way, the seedling mat 74 is placed on the seedling stage 16 of the rice transplanter 100, and the drug spreader 140 is disposed above the seedling stage 16 so that the seedling mat 74 is applied simultaneously with transplantation. 140
A cylindrical rotating body 66 is rotatably fitted around the tip of the spray nozzle 65 connected to the lower part of the feeding part 42 of the medicine spreader 140, and the seedling mounting table 16 is brought into contact with the rotating body 66. While providing the contact member 62,
Since a scraper 69 projecting from the rotating body 66 and extending on the inner surface of the tip of the spray nozzle 65 is provided,
At the same time as the medicine is sprayed at the time of transplantation, the seedling stage 16 reciprocates left and right, and when this reciprocating motion occurs, the rotating body 66 rotates in contact with the contact member 62 and adheres to the tip of the spray nozzle 65 by this rotation. The scraped mud and chemicals can be scraped off by the scraper 69. Moreover, clogging of the spray nozzle 65 can be prevented. And since the power for rotating the rotary body 66 is unnecessary, a structure can be simplified. In this case, the contact member 62 can be forcibly driven, so that even if the rotating portion of the rotating body 66 is clogged with dust or the like, it can be reliably rotated.

In addition, since a plurality of scrapers 69, 69... Are provided,
Even if the rotational speed of the rotating body 66 is not large, that is, even if the rotation angle is small, the scrapers 69, 69... Can slidably contact the entire circumference of the spray nozzle 65. Can be cleaned without scraping.

Next, in addition to the scraper 69, a technique for removing mud and the like adhering to the inner periphery of the rotating body 66 will be described.
As shown in FIG. 7, one or more scrapers 70 are fixed to the outer periphery of the lower end of the spray nozzle 65 by fixing means such as bolts 71. The fixing means is disposed in a gap formed between the lower inner diameter of the rotating body 66 and the outer periphery of the lower end of the spray nozzle 65. The attachment position of the scraper 70 is fixed at a position that does not interfere with the dropping of the medicine, that is, at a position other than the lower position. When two or more nozzles are provided, they are fixed at a predetermined interval other than the lower position of the outer periphery of the lower end of the spray nozzle 65. The scraper 70 is formed in a substantially U-shape or bent like a scraper 69 so that the other end of the scraper 70 can slide in contact with the lower inner periphery of the rotating body 66. Has been.

As described above, the scraper 70 is provided so as to protrude from the outer periphery of the tip of the spray nozzle 65 and extend so as to contact the inner periphery of the tip of the rotating body 66.
Even when the drug adheres to the inner periphery of the tip of the rotating body 66, the rotating body 66 rotates as described above, whereby the drug, mud, and the like attached by the scraper 70 can be scraped off. It is possible to prevent clogging at the tips of the nozzle 66 and the spray nozzle 65.

Further, since a plurality of the scrapers 70, 70... Are provided,
Even if the rotation angle of the rotator 66 is small, mud and chemicals adhering to the inner periphery of the tip of the rotator 66 can be removed.

Next, a second embodiment of the rotating body will be described.
As shown in FIG. 8, the rotating body 66b of the second embodiment may have a configuration in which a plurality of protrusions 67, 67... Are provided on the outer periphery of the rotating body 66b. That is, rod-shaped protrusions 67, 67,... Are radially provided on the outer periphery of the rotating body 66b at predetermined intervals. However, the protrusion 67 is not limited to a rod shape, and may be a plate shape as long as it does not damage the seedling 75 and is lightweight. Therefore, instead of providing the protrusion 67, a configuration in which a star-shaped plate is fixed to the outer periphery of the rotating body 66b may be employed.

  In this case, unlike the first embodiment, it is not necessary to provide the contact member 62 on the upper surface of the frame of the seedling mount 16 as shown in FIGS. The rotating body 66b is rotated. That is, as shown in FIG. 9, the spray nozzle 65 is slid with respect to the guide tube 64 to expand and contract, and the rotating body 66 b is placed in the vicinity of the stock of the seedling 75 of the seedling mat 74 placed on the seedling mounting table 16. It is positioned and fixed. Preferably, the spray nozzle 65 is arranged to be inclined with respect to the planting direction of the seedling 75 so that only one side of the projections 67, 67. Arrange.

  With this configuration, when the seedling stage 16 is reciprocated left and right during planting work, the protrusions 67, 67... Abut on the seedling 75 of the seedling mat 74, and the rotating body 66b rotates. Will come to do. That is, when the seedling stage 16 is moved in the left or right direction, the protrusion 67 of the rotating body 66b is caught by the seedling 75 and rotated, and the scrapers 69 and 70 are rotated by the rotation of the tip of the spray nozzle 65. The inner periphery of the rotor and the inner periphery of the tip of the rotating body 66b are slidably contacted to scrape off adhering mud and chemicals. When the seedling stage 16 reaches the left end or the right end and moves in the reverse direction, the rotating body 66b rotates in the reverse direction.

In this way, the seedling mat 74 is placed on the seedling stage 16 of the rice transplanter 100, and the drug spreader 140 is disposed above the seedling stage 16 so that the seedling mat 74 is applied simultaneously with transplantation. 140
A cylindrical rotating body 66b is rotatably fitted around the tip of the spray nozzle 65 connected to the lower part of the feeding part 42 of the medicine spreader 140, and a plurality of protrusions 67, 67, .. is provided so that it can come into contact with the seedling mat 74, and
Since a scraper 69 that protrudes from the rotating body 66b and extends to the inner surface of the tip of the spray nozzle 65 is provided,
At the same time as the medicine is sprayed at the time of transplantation, the mounting table 16 reciprocates left and right, and when this reciprocation, the protrusions 67, 67... Provided on the rotating body 66b abut on the seedling 75 of the seedling mat 74 and rotate. Then, mud, chemicals, etc. adhering to the tip of the spray nozzle 65 due to this rotation can be scraped off by the scraper 69. Moreover, clogging of the spray nozzle 65 can be prevented. And since it is not necessary to provide the seedling stage 16 with the power for rotating the rotary body 66b, or the member for rotating, the structure can be simplified.

Further, as described above, the spray nozzle 65 is provided so that the position can be adjusted.
Even if the seedlings 75 of the seedling mat 74 have different lengths, the positions of the rotating bodies 66 and 66b can be adjusted according to the length of the seedlings 75. The position can be adjusted so as to rotate, and the medicine can be surely sprayed.

Next, an embodiment in which an umbrella member for preventing rain is arranged above the rotating body will be described. In addition, although the rotary body 66b is demonstrated, the rotary body 66 may be sufficient.
As shown in FIG. 10, an umbrella-shaped cover 15 that covers the upper part of the rotating body 66b with a predetermined interval is fitted and fixed to the spray nozzle 65 above the rotating body 66b. The umbrella-shaped cover 15 is composed of a support portion 15a configured as an upper pipe and an umbrella portion 15b whose lower portion is expanded in a trumpet shape, and the radius of the support portion 15a matches the radius of the outer periphery of the spray nozzle 65 and is closely attached. Therefore, it is fixed so that water does not enter. The radius of the umbrella portion 15b is longer than the radius of the rotating body 66b and shorter than the distance from the center of the spray nozzle 65 to the tip of the protrusion 67, and between the lower inner surface of the cover 15 and the upper outer periphery of the rotating body 66b. In addition to the structure, the rainwater that falls is configured to have a space that does not enter, and the tip of the protrusion 67 projects so as not to interfere with the seedling. The lower end of the cover 15 is positioned below the upper end of the rotating body 66b so that the upper end of the rotating body 66b is positioned in the umbrella portion 15b.

Thus, since the umbrella-shaped cover 15 that covers the upper side of the rotating body 66b is provided,
The rain that falls on the guide cylinder 64, the spray nozzle 65, and the cover 15 above the rotating body 66b falls down and falls on the seedling mat from the lower end of the cover 15. At this time, since there is a space between the lower end of the cover 15 and the outer periphery of the rotating body 66b, the rainwater enters the gap between the upper end of the rotating body 66b and the upper part of the bearing member 63 and the gap between the upper part of the bearing member and the spray nozzle 65. Does not enter, and falls outside the rotating body 66b. Therefore, it is possible to prevent the rainwater from entering the upper portion of the rotating body 66b and reaching the lower end of the spray nozzle 65, moistening the periphery thereof, adhering fertilizer and the like, and clogging.

Another embodiment of the cover will be described.
As shown in FIG. 11, the cover 15 is formed in a substantially elliptical shape or an eccentric circle in a plan view by extending the lower side of the umbrella portion 15 c downward, and the support portion 15 a is arranged at an eccentric center position and dispersed. The nozzle 65 is externally fitted. The lower end of the umbrella portion 15c is covered with the umbrella portion 15c only on the lower side of the projections 67, 67... Provided on the outer periphery of the rotating body 66b. In other words, the tip of the lower umbrella portion 15 c is configured to protrude outward from the tip of the lower protrusion 67.
With this configuration, only the upper projections of the projections 67, 67,... Provided on the outer periphery of the rotating body 66b come into contact with the seedlings. However, the lower side does not come into contact with the seedling, but only the upper protrusion 67 comes into contact, and it is possible to prevent the rotation of the rotating body 66b and to reliably rotate it to remove the clogging by the scraper 69. it can. And since the distance between the umbrella part 15c lower end and the rotary body 66b can also be lengthened, it can prevent that rainwater etc. wrap around inside.

Next, the arrangement angle θ of the spray nozzle 65 will be described.
As shown in FIG. 4, the spray nozzle 65 is fixed to the support frame 53 via the lower horizontal frame 53d. The mounting angle θ of the spray nozzle 65 is tilted backward from the vertical direction Z in a side view. It is attached so as to occur from the direction X perpendicular to the seedling mount 16. In other words, the spray nozzle 65 is attached at an angle located between the vertical direction and the direction perpendicular to the seedling stage 16 in a side view.
That is, when the spray nozzle 65 is arranged in the vertical direction, the medicine falls naturally, falls within the spray nozzle 65 without resistance, the medicine is not damaged, and clogging hardly occurs.

However, the angle with respect to the seedling 75 increases as the angle of the surface of the seedling stage 16 approaches, and the seedling 75 is pushed down and damaged when the seedling stage 16 is reciprocated left and right. On the other hand, when the spray nozzle 65 is positioned at a right angle to the seedling stage 16, the resistance to the lateral movement of the seedling 75 is reduced, but it hits the upper and lower protrusions 67 provided on the outer periphery of the rotating body 66b substantially evenly. It becomes difficult to rotate. In addition, if the medicine is tilted too much in the horizontal direction, it becomes difficult for the medicine to fall.
Therefore, by setting the inclination angle θ of the spray nozzle 65 between the perpendicular direction and the vertical direction with respect to the placement surface of the seedling mounting table 16, the medicine can easily fall onto the root portion of the seedling 75 of the seedling mat 74. Thus, the rotating bodies 66 and 66b can also be smoothly rotated.

As described above, the spray nozzle 65 is disposed so as to be inclined at an angle between the direction perpendicular to the installation surface of the seedling stage 16 from the vertical direction in a side view.
It is possible to reliably drop the medicine from the spray nozzle 65 and drop it onto the stock of the seedling 75 on the seedling mat 74, and to reliably rotate the rotating bodies 66 and 66 b by the lateral movement of the seedling mat 74. It becomes possible to prevent the seedling 75 from being damaged by the rotating bodies 66 and 66b.

The side view which showed the whole structure of the riding rice transplanter 100 concerning one Example of this invention. The side view which similarly showed the riding rice transplanter 100 rear part. The top view which showed the seedling mounting stand. The side view which showed the chemical | medical agent spreader 140. FIG. The top view which showed the spraying nozzle 65. FIG. Sectional drawing which showed the 1st Example of the rotary body 66. FIG. The cross-sectional front view which showed the state which externally fitted the rotary body 66 in the 1st Example to the spray nozzle 65. FIG. Sectional front view which showed the state which externally fitted the rotary body 66b in the 2nd Example to the spreading nozzle 65. FIG. The side view which showed a mode that the rotary body 66b contact | abutted to the seedling 75. FIG. The partial cross section side view which shows the state which covered the rotary body 66b upper part with the cover 15. FIG. The partial cross section side view which shows the state which covered the rotary body 66b upper part with the substantially elliptical cover 15 in planar view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 15 Cover 16 Seedling stand 62 Contact member 65 Spray nozzle 66 * 66b Rotating body 67 Protrusion 69 * 70 Scraper 100 Rice transplanter 140 Drug spreader

Claims (8)

Place the seedling mat on the seedling stage of the rice transplanter, place the drug spreader above the seedling stage, in the drug spreader to apply to the seedling mat simultaneously with transplantation,
A cylindrical rotating body is rotatably fitted around the tip of the spray nozzle connected to the lower part of the feeding part of the medicine spreader, and a contact member that comes into contact with the rotating body is provided on the seedling stage,
A drug spreader provided with a scraper protruding from the rotating body and extending on the inner surface of the tip of the spray nozzle. Place the seedling mat on the seedling stage of the rice transplanter, place the drug spreader above the seedling stage, in the drug spreader to apply to the seedling mat simultaneously with transplantation,
A cylindrical rotating body is rotatably fitted around the tip of the spray nozzle connected to the lower part of the feeding part of the medicine spreader, and a plurality of protrusions are provided on the outer periphery of the rotating body to contact the seedling mat seedling. As well as possible
A drug spreader provided with a scraper protruding from the rotating body and extending on the inner surface of the tip of the spray nozzle.   The drug spreader according to claim 1 or 2, wherein a plurality of the scrapers are provided.   The drug spreader according to claim 1 or 2, further comprising a scraper extending from the outer periphery of the tip of the spray nozzle and extending so as to contact the inner periphery of the tip of the rotating body.   The drug spreader according to claim 4, wherein a plurality of the scrapers are provided.   5. The medicine spreader according to claim 1, wherein the position of the spray nozzle is adjustable.   The medicine sprayer according to claim 6, wherein the spray nozzle is disposed so as to be inclined at an angle between a vertical direction and a direction perpendicular to the installation surface of the seedling stage in a side view. The medicine spreader according to any one of claims 1 to 7, further comprising a cover that covers an upper portion of the rotating body.

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