KR101954124B1 - Boat for spraying pesticide - Google Patents

Abstract

The present invention relates to a boat for spraying a pesticide, which is implemented to spray a pesticide while automatically driving on a rice paddy filled with water. The boat for spraying a pesticide includes: a boat main body unit automatically driving on a rice paddy; and a pesticide spraying unit spraying a pesticide stored in a pesticide tank formed inside the boat main body unit to a rice paddy through a spraying nozzle installed on both sides of the back end of the boat main body unit.

Description

Pharmaceutical spray boats {BOAT FOR SPRAYING PESTICIDE}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a medicine spraying boat, and more particularly, to a medicine spraying boat embodying a medicine spraying apparatus capable of spraying medicines while autonomously running water.

The fertilizer and pesticide are used to promote the growth of rice and protect it from various insect pests until the rice is harvested in the autumn after the planting of the rice paddy. The work of supplying such fertilizer and pesticide is performed by the farmer in the fertilizer spreader or the pesticide spreader The labor force is very useful because it should be sprayed directly on the entire paddy field.

Recently, a tractor-mounted fertilizer spreader and a pesticide spreader have been developed, in which a fertilizer spreader or an agricultural chemical spreader is mounted on a tractor to spray fertilizer and pesticide.

However, existing tractors for fertilizer and pesticide spraying are bulky and have a disadvantage in that they are not suitable for spraying pesticides and fertilizers.

Korean Patent Publication No. 10-2013-0114319 Korean Registered Utility Model No. 20-0237376

One aspect of the present invention is to provide a method of spraying medicines stored in a medicament storage tank installed in a boat while autonomously running a rice paddy by using two spray nozzles installed at the rear end of the boat, Provide spray boats.

The technical problem of the present invention is not limited to the technical problems mentioned above, and other technical problems which are not mentioned can be understood by those skilled in the art from the following description.

According to an embodiment of the present invention, there is provided a medicine spraying boat comprising: a boat main body portion self-traveling in a paddy; And a medicament spattering unit for spraying medicines contained in medicament tanks formed in the inside of the boat main body through the spray nozzles provided on both sides of the rear end of the boat main body.

In one embodiment, the boat main body part travels in accordance with a travel control signal received from the user controller, or autonomously travels within a predetermined area upon receipt of a GPS signal, and the medicine sprayer is installed in the boat main body, A medicament storage tank for storing medicines in an internal space; Two spray nozzles disposed on both sides of the rear end of the boat main body for spraying the medicine delivered from the medicine storage tank; A chemical pump for supplying a chemical contained in the chemical storage tank to the injection nozzle in response to a supply control signal for controlling chemical supply so that the chemical contained in the chemical storage tank can be injected through the chemical injection nozzle; A spray controller for generating a supply control signal for controlling the supply period of the medicine or the supply amount of the medicine by the medicine pump and transmitting the generated supply control signal to the medicine pump; And two spinning and spraying units connected to the rear end of the boat body and connected to a plurality of frames respectively and distributing the medicine sprayed through the spraying nozzle while rotating in accordance with the running speed of the boat body, A controller for controlling the supply amount of the medicine by the medicine pump in accordance with the moving speed of the boat body part and measuring the remaining amount of the medicine contained in the medicine storage tank to generate a remaining amount warning signal when the medicine is less than the predetermined amount, Wherein the spray nozzle rotates in a direction in which the chemical liquid is sprayed by 360 ° and the spray spray unit is formed in a circular shape and is arranged in a plurality of frames so that the rotation axis coincides with the spray direction of the spray of the spray nozzle A rotating sphere provided at a rear end of the boat main body at a predetermined interval; And a blade having a predetermined height extending from the front end to the rear end of the rotating sphere along the outer side in a spiral direction and rotating the rotating sphere with a flow of air due to the movement of the boat body and a friction force with the vane, And a dispersing vane that distributes the medicine injected through the injection nozzle while rotating the vane in a direction perpendicular to the rotation axis of the rotation sphere.

According to one aspect of the present invention, one aspect of the present invention provides a method of spraying a medicine in both directions of a rear end of a boat while autonomously running a rice paddy, . ≪ / RTI >

1 and 2 are views showing a schematic configuration of a medicine spraying boat according to an embodiment of the present invention.
3 is a view showing another embodiment of the medicine dispensing unit of FIG.
FIG. 4 is a view showing the spinneret of FIG. 3. FIG.
5 is a view showing a schematic configuration of a medicine spray boat according to another embodiment of the present invention.
Fig. 6 is a view for explaining the shock absorbing portion of Fig. 5;
7 is a flowchart illustrating a method of producing a plastic sheet for producing the plastic sheet of the present invention.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the drawings.

1 and 2 are views showing a schematic configuration of a medicine spraying boat according to an embodiment of the present invention.

1 and 2, a medicine spraying boat 10 according to an embodiment of the present invention includes a boat main body 100 and a medicine sprayer 200.

The boat main body 100 is an autonomous traveling boat designed to be able to run autonomously while floating on the water supplied to rice paddies. The respective components of the medicine sprinkler 200 are installed on the upper part. And transmits / receives data to / from the user controller through wireless communication.

Here, the boat main body 100 is preferably formed to have a width of 500 mm, a length of 1150 mm, and a height of 534 mm in consideration of the loading amount and the motion performance of the medicine.

In one embodiment, the boat body portion 100 is formed of a light tubular material such as a plastic sheet described later, and may be formed so as to have a narrower left and right width toward the front end thereof, so that the boat body portion 100 can be easily moved forward.

At this time, the boat main body 100 travels in accordance with the travel control signal received from the user controller via wireless communication or wired communication, or receives the GPS signal and receives the GPS signal to set the predetermined discussion area And so on).

In one embodiment, the boat body portion 100 can be made of a plastic sheet having superior moldability and durability than a plastic sheet produced by using PET resin alone.

The plastic sheet according to the present invention is produced by the following method for producing a plastic sheet.

7, a method of producing a plastic sheet for producing a plastic sheet according to the present invention comprises: 100 parts by weight of a polyethylene terephthalate (PET) resin; 2 to 4 parts by weight of a polyurethane dispersant; 0.1 to 0.2 part by weight of polyethylene dioxythiophene polystyrene sulfonate, 3 to 5 parts by weight of polystyrolsulfonic acid, N-methyl-2-pyrrolidone, 0.1 to 0.3 parts by weight of triethylamine, 42 to 45 parts by weight of isopropyl alcohol and 50 to 52 parts by weight of water to prepare a mixed composition (S110); A second step (S120) of preheating the mixed composition; A third step (S130) of removing moisture from the preheated mixed composition; A fourth step (S140) of heating the moisture-removed mixed composition; A fifth step (S150) of removing foreign substances from the heated mixed composition; A sixth step (S160) of stretching the mixed composition from which the foreign substances have been removed while cooling it to produce a plastic sheet; And a seventh step (S170) of applying silicone to the plastic sheet and drying the plastic sheet.

The present invention can produce a plastic sheet having excellent moldability and durability by preheating, dehumidifying, heating and cooling by mixing various additives with conventional PET resin.

In the first step S110, as a mixing step of the raw materials, polyethylene terephthalate (PET) resin is used as a base resin, and a polyurethane dispersant, polyethylene dioxythiophene polystyrene sulfonate ), Polystyrolsulfonic acid, N-methyl-2-pyrrolidone, triethyl amine, isopropyl alcohol and water. .

The PET resin is a base resin, which has excellent thermal stability and high crystallinity, can be recycled, and is manufactured in a master batch form. The polyurethane dispersant functions to improve the compatibility with other components. Polyethylene dioxythiophene polystyrene sulfonate, polystyrolsulfonic acid, N-methyl-2-pyrrolidone, and triethyl amine. Function as an antistatic agent. Since the plastic sheet for producing the plastic container is generally an electrical insulator, static electricity is generated by friction charging, and if it is seriously damaged by discharge or electric conduction, it may lead to an accident such as explosion or fire, so it is preferable to add a charging agent . Isopropyl alcohol functions as an antifogging agent. The anti-fogging agent can inhibit the formation of water droplets due to the water vapor which may be generated when a plastic container is used to store a fruit or the like by using a plastic sheet.

In one embodiment, the above ingredients are mixed with 100 parts by weight of a polyethylene telephthalate (PET) resin, 2 to 4 parts by weight of a polyurethane dispersant, polyethylene dioxythiophene polystyrene sulfonate ), 0.4 to 0.6 parts by weight of polystyrolsulfonic acid, 3 to 5 parts by weight of N-methyl-2-pyrrolidone, 0.1 to 5 parts by weight of triethylamine amine in an amount of 0.1 to 0.3 part by weight, 42 to 45 parts by weight of isopropyl alcohol and 50 to 52 parts by weight of water. When added beyond the above-mentioned range, various problems may occur. Particularly, in the case of an antistatic agent, when mixed over the respective ranges, the plastic surface to be produced may be sticky, the sealing property and printability may be deteriorated, and in the case of white plastic, yellowing may occur.

In addition, the first step (S110) can further mix various additional components in the raw materials to enhance the functionality of the plastic sheet.

In one embodiment, the boron-based binder may be further mixed. The boron (B) type binder is used for bonding the respective components, and the boron type binder is preferably mixed in 2 to 10 parts by weight with respect to 100 parts by weight of the PET resin. When the content of the boron-based binder is less than 2 parts by weight, the raw material or the like can not be effectively bonded, and when the content of the boron-based binder exceeds 70 parts by weight, it is uneconomical.

In one embodiment, the garlic extract may be further mixed. The garlic extract is a natural adhesive component, which together with the boron-based binder functions as a binder which improves the compatibility with other constituents. The garlic extract is peeled and crushed, and 2 to 3 parts by weight of water is added per 1 part by weight of garlic. After heating at 80 to 100 캜 for 5 hours or more, the liquid component is extracted and filtered, The liquid component can be prepared by concentrating at 55 to 60 占 폚. The garlic extract is preferably mixed in 5 to 10 parts by weight with respect to 100 parts by weight of the PET resin. When the content of the garlic extract is less than 5 parts by weight, the raw material components may not be properly entangled so that the surface of the plastic sheet may not be uniformly formed. When the amount of the garlic extract is more than 10 parts by weight, There is a risk of degradation.

In one embodiment, the apatite powder may be further mixed. The apatite powder functions as a filler and can maintain the shape of the plastic sheet, thereby improving workability and improving strength and corrosion resistance. Apatite is an inorganic substance present in bone. It is important to use a small amount of particles, a high residual amount of carbonate, and low crystallinity for use as a filler. Preferably, the size of the apatite granules is 200 to 400 탆. For this purpose, it is important to carry out the sintering process at 500 to 700 ° C. When sintering at less than 500 ° C, there is a disadvantage in that the desired granule size and crystallinity can not be obtained. When sintering exceeds 700 ° C, there is a disadvantage in that the remaining amount of carbonate is low and the crystallinity becomes too high. The apatite powder is preferably mixed in 20 to 30 parts by weight with respect to 100 parts by weight of the PET resin. When the content of the apatite powder is less than 20 parts by weight, there is a disadvantage in that the adhesive strength is lowered, and when it exceeds 30 parts by weight, the impact resistance is weakened.

In one embodiment, the cork powder may be further mixed. Cork powder can improve the durability of the plastic sheet with apatite powder. The cork powder can be prepared by removing the shell of oak oak and then crushing it. For the cork powder to be mixed with the PET resin and the like, it is preferable to use fine pulverized particles which have been passed through a mesh of 400 mesh or more. The cork powder is preferably mixed in 15 to 25 parts by weight with respect to 100 parts by weight of the PET resin. When the cork powder is less than 15 parts by weight, improvement in durability is insignificant. When the cork powder is more than 25 parts by weight, porosity may be formed in the production of plastics, and durability may be lowered.

In one embodiment, the Sorghum extract can be further mixed. Sorghum extract not only acts as an antimicrobial agent but also inhibits the yellowing of white plastic sheets. Rumex crispus is a genus of Rumex spp. It is a perennial herb that grows well in moist places of various places. It uses the lysoon as a food in the private sector. In the oriental medicine, it is called a yosei, and it is categorized into various diseases including cystitis, gallbladder disease, bile secretion disorder, spleen disease, It is used as an adjuvant treatment for tumors and cancer. Sorghum extract extracted from Sora japonica has antimicrobial and antioxidant effects against various microorganisms. When mixed with a small amount of sulfur, it has an excellent effect on skin itching. It has been reported that saponins, tannins, flavonoids, essential oils and chrysophanol, and anthraquinone derivatives such as emodin, are known to be useful components of the present invention. The extracts of Sorae Seedlings were washed in 80% (v / v) methanol for 3 days as an extraction solvent by washing the collected Sorghum wells and then drying them in the shade and dividing them into the ground part (except the root) and the root part (root part) After soaking, the extract is filtered with a membrane filter (pore size 0.5 mu m) to separate the solid, and the methanol extract can be prepared by concentrating the extract at 50 DEG C using a rotary evaporator. It is preferable that the Sorghum extract is mixed in 3 to 8 parts by weight with respect to 100 parts by weight of the PET resin. When the content of the extract is less than 3 parts by weight, the antimicrobial activity is insufficient in preventing yellowing, and when it is more than 8 parts by weight, it is uneconomical.

The second step (S120) is a step of preheating the mixed composition, and heat is applied to the mixed material so that the materials are stably mixed.

The third step (S130) is a dehumidifying step for removing moisture present in the preheated mixed composition, and the desiccation is preferably performed in a temperature range of 150 to 180 ° C. If the amount is less than or more than the above range, the dehumidification may not be sufficiently performed, or the durability of the plastic may be adversely affected.

The fourth step (S140) is a step of heating the mixed composition from which moisture has been removed, and the heating temperature is preferably controlled to 260 to 270 ° C in order to melt and maintain the mixed composition.

The fifth step S150 is a step of removing foreign matter from the heated mixed composition. The foreign matter may be removed from the inside of the mixed composition by passing through a screen in the form of a mesh.

The sixth step (S160) is a step of cooling the mixed composition from which foreign matters have been removed to prepare a plastic sheet, which is then stretched in two stages using a cooling roll. The primary stretching takes place in the longitudinal direction through a chill roll maintained at 16-17 캜 and the secondary stretching takes place in the width direction (vertical direction in the longitudinal direction) through a cooling roll maintained at 20-23 캜. The reason for raising the temperature of the secondary elongation to be higher than the primary elongation temperature is to prevent the plasticizability of the solidified plastic sheet from being dried and to improve the durability and moldability of the plastic sheet by alternately stretching the longitudinal direction and the width direction .

The seventh step (S170) is a step of applying silicone to the plastic sheet and then drying it, so that the antistatic effect can be obtained while the silicone is applied and finished. It is preferable that silicone is applied using a diluted coating liquid in a concentration range of 5 to 25%, coated with silicone, and then dried at 160 to 215 캜. Further, it is preferable that the anti-fogging agent component is mixed with the silicone-containing coating liquid in order to suppress the water phenomenon formed in the produced plastic container.

Hereinafter, the structure and effects of the present invention will be described in more detail with reference to specific examples and comparative examples. However, this embodiment is intended to explain the present invention more specifically, and the scope of the present invention is not limited to these embodiments.

[Examples and Comparative Examples]

After preparing a mixed composition according to the composition shown in the following Table 1, plastic sheets were prepared by preheating, dehumidifying, heating, removing foreign matter, cooling, stretching and drying to prepare Examples and Comparative Examples. For each material, commercially available materials were used, and garlic extract and Sorghum extract were prepared as described in the detailed description of the invention.

[Table 1]

[Experimental Example 1]

The compositions of Examples 1 to 3 and Comparative Examples were secondarily drawn to prepare a plastic sheet having a thickness of 10 mm, and the uniformity of the sheet surface was measured and reported in Table 2 below. At this time, the primary drawing was performed at 16 占 폚 and the secondary drawing was performed at 21 占 폚. The uniformity was measured using a laser sensor (N2 laser, oscillation wavelength 337.1 nm, UDHO Laser., Japan), and 30 points were randomly selected and their surface roughness was measured , A value equal to or less than 0.3 was considered to be uniform, and a value exceeding 0.3 was evaluated to be non-uniform. Here, Examples 1 to 3 were stretched in the transverse direction after stretching in the longitudinal direction, and stretched only in the longitudinal direction in the Comparative Example.

[Table 2]

As shown in Table 2, in Examples 1 to 3, uniformity was more excellent than Comparative Example.

[Experimental Example 2: Torsion Test]

The compositions of Examples 1 to 3 and Comparative Examples were secondarily stretched to prepare a plastic sheet having a thickness of 2 mm and then molded to produce 100 plastic products, and the completeness of the plastic sheets was evaluated. Here, Examples 1 to 3 were stretched in the transverse direction after stretching in the longitudinal direction, and stretched only in the longitudinal direction in the Comparative Example.

[Table 3]

As shown in Table 3, in the case of Examples 1 to 3, 90% or more of the normal product could be made, but the comparative example had a relatively high defect rate.

[Experimental Example 3: yellowing test]

The compositions of Examples 1 and 3 were secondarily stretched to prepare a plastic sheet having a thickness of 2 mm and then molded to prepare 100 white plastic products. Ten months later, discoloration was visually observed, . At this time, a part changed to yellow color was evaluated as poor.

[Table 4]

As shown in Table 4, in Example 3, it was confirmed that almost all the products were not discolored. On the other hand, Example 1 showed good results, but had a higher discoloration rate than Example 3.

[Experimental Example 4: Anti-Fogging Test]

The composition of Comparative Example and Example 3 was secondarily drawn to prepare a plastic sheet having a thickness of 2 mm and then molded to produce 100 white plastic products. The spinach was stored inside, and after one day, The results are shown in Table 5 below.

[Table 5]

As shown in Table 5, in the case of Example 3, almost no water droplets were formed, but in the comparative example, it was confirmed that water droplets enough to be visually recognized were formed.

The main body 110 made of a plastic sheet as described above can be more excellent in moldability and durability than that produced by using PET resin alone.

The medicine dispensing unit 200 dispenses medicines (for example, pesticides such as pesticides or herbicides) contained in the medicine tank formed inside the boat main body 100 to the spray nozzles To the rice paddy.

The medicine spraying boat 10 having the above-described structure sprays the medicine through the medicine spraying unit 200 in the direction of both sides of the rear end of the boat body 100 while autonomously running the rice paddies, The herbicide and other medicines can be efficiently sprayed to the rice field in a short period of time.

2, the medicine dispensing unit 200 includes a medicine storage tank 210, two injection nozzles 220, a medicine pump 230, and a dispensing control unit 240.

The medicine storage tank 210 is installed in the boat main body 100 and stores medicines in the inner space and supplies medicines stored in the inner space by the medicament pump 230 to the respective spray nozzles 220 .

The spray nozzles 220 are installed on both sides of the rear end of the boat main body 100 and spray medicines delivered from the medicine storage tank 210 by the medicine pump 230 to the rice paddies.

In one embodiment, the injection nozzle 220 is provided so as to rotate the portion provided in the boat body portion 100, or to rotate only the nozzle portion, so that the chemical liquid is injected in consideration of variables such as the sprayed area of the chemical liquid Direction can be rotated by 360 °.

The medicine pump 230 is driven by driving means such as a motor independent of a motor or the like for driving the propeller of the boat body portion 100. The medicine contained in the medicine storage tank 210 is supplied through the injection nozzle 220 The medicine contained in the medicine storage tank 210 is supplied to the injection nozzle 220 in response to the supply control signal for controlling the supply of the medicine from the dispensing control unit 240 so that the medicine can be injected.

The dispensing control unit 240 generates a supply control signal for controlling the supply period of the medicine or the supply amount of the medicine by the medicine pump 230 and transmits the supply control signal to the medicine pump 230.

In one embodiment, the dispensing control unit 240 transmits and receives data to and from the user controller via wireless communication or wired communication, measures the remaining amount of the medicine contained in the medicine storage tank 210, A case where the remaining amount of the medicine drops to less than 5%, etc.), the remaining amount warning signal can be generated and transmitted to the user controller.

In one embodiment, the dispensing control unit 240 can control the supply amount of the medicine by the medicine pump 230 in accordance with the moving speed of the boat main body 100.

For example, the dispensing control unit 240 may set the dispensing amount of the medicine to be three times higher when the moving speed of the boat body 100 is 30 km / h than when the traveling speed of the boat body 100 is 10 km / h, It is possible to more efficiently perform the spraying of the medicine according to the moving speed of the sprayer.

FIG. 3 is a view showing another embodiment of the medicine dispensing unit of FIG. 1. FIG.

3, the medicine dispensing unit 200 includes a medicine storage tank 210, two injection nozzles 220, a medicine pump 230, a dispensing control unit 240, and two rotation dispensing units 250 .

Here, the drug storage tank 210, the two injection nozzles 220, the drug pump 230, and the spraying control unit 240 are the same as those in FIG.

The spinning and spraying unit 250 is connected to the rear end of the boat body unit 100 by a plurality of frames and is rotatable in correspondence with the running speed of the boat body unit 100, .

Here, the spinning and distributing unit 250 does not have a motor or the like for driving, and uses a wing installed in a spiral manner as described below to passively move the boat body 100 by using the frictional force with the air, .

FIG. 4 is a view showing the spinneret of FIG. 3. FIG.

Referring to FIG. 4, the rotating spray unit 250 includes a rotating sphere 251 and a dispersing blade 252.

The rotating sphere 251 is formed in a circular shape having a dispersing vane 252 formed in a spiral shape along the outer surface thereof so that the rotation axis is aligned with the spraying direction of the spraying nozzle 220, (For example, 200 mm to 300 mm or the like) at the rear end of the main body 100.

The reason why the rotating sphere 251 is connected to the boat body 100 is that the medicine sprayed from the spray nozzle 220 can be sufficiently applied to the rotating sphere 251 while being sprayed toward the rotating sphere 251 In order to maintain the spacing.

The dispersing vane 252 is provided with a wing having a predetermined height (for example, 10 mm to 50 mm) extending from the front end to the rear end of the rotating sphere 251 along the outer side in the spiral direction, And the medicament injected through the injection nozzle 220 is rotated at a right angle to the rotation axis of the rotating sphere 251 by the rotational force of the rotating sphere 251 by the frictional force between the air flow and the blade .

In one embodiment, the dispersing vanes 252 can form threads along the vane wall such that the medicament can flow efficiently in the outward direction.

5 is a view showing a schematic configuration of a medicine spray boat according to another embodiment of the present invention.

5, the medicine sprayer boat 20 according to another embodiment of the present invention includes a boat main body 100, a medicine sprayer 200, and a protection bumper 300.

Here, the boat main body 100 and the medicament sprinkler 200 are the same as those in Fig. 1, and a description thereof will be omitted.

The protection bumper part 300 is connected to the front end of the boat body part 100 so as to protect the boat body part 100 from an impact with an obstacle (for example, a rock or a user).

In one embodiment, the protective bumper portion 300 may include a protective frame portion 310 and a plurality of shock absorbers 320.

The protective frame part 310 is formed in a shape corresponding to the shape of the front end of the boat body part 100 and is separated from the front end of the boat body part 100 by the impact absorbing part 320, 100) from directly colliding with the obstacle.

The shock absorbing part 320 is provided between the boat body part 100 and the protective frame part 310 and absorbs the impact when the obstacle collides with the protective frame part 310 and absorbs the impact from each direction At least three (both the front end and the front end of the boat body portion 100) are preferably provided.

Fig. 6 is a view for explaining the shock absorbing portion of Fig. 5;

6, the shock absorbing portion 320 includes a support portion 321, a case portion 322, an extension portion 323, a shock buffering portion 324, and a fastening portion 325.

The support portion 321 is formed of a steel material such as a circular or rectangular steel plate and is provided at the rear end of the protective frame portion 310. [

The case 322 is formed in a cup shape with its bottom opened and is located at the lower end of the supporting portion 321 and is formed to penetrate in the vertical direction so that the extension portion 323 and the shock buffering portion 324 are inserted And the extending portion 323 reciprocates in the through hole opened to the lower end and the through hole is formed to be narrower than the engaging jaw formed at the lower end of the extending portion 323 to prevent the extending portion 323 from escaping.

The extension portion 323 is inserted into the case portion 322 and the upper portion is fixedly fixed to the lower end of the support portion 321 And a shock buffer 324 is formed at the lower end (that is, the lower part of the latching jaw).

The impact buffering part 324 is inserted into the lower space of the extension part 323 inserted into the case part 322 so as to buffer the impact from the protective frame part 310. [

In one embodiment, shock cushion 324 may include strut 3241 and resilient portion 3242.

The stretchable portion 3241 is formed to have a predetermined length (for example, 1 cm to 3 cm) between the extended portion 323 and the fastening portion 325, And is inserted into the empty space between the extending portion 323 and the fastening portion 325 so as to prevent it from approaching within a set distance.

In one embodiment, the strut 3241 includes a first strut 3241-1, a plurality of second strut 3241-2, and a plurality of third strut 3241-3.

The first supporting portion 3241-1 is inserted into the inner space of the elastic portion 3242 and the upper portion of the first supporting portion 3241-1 is fixed to the lower side of the extending portion 323 and between the extending portion 323 and the fastening portion 325 (For example, 1 cm to 3 cm or the like) to prevent the extension portion 323 from approaching within a predetermined distance (for example, 1 cm to 3 cm, etc.) with the fastening portion 325.

The second extending portion 3241-2 is formed to have a shorter length (for example, 0.8 cm to 2.5 cm or the like) than the first supporting portion 3241-1 and is located along the outer surface of the elastic portion 3242 And the rear upper portion is fixed to the lower side of the extended portion 323.

The third strut part 3241-3 is formed to have a shorter length than the second strut part 3241-2 (for example, 0.5cm to 2cm or the like) The upper portion is fixed to the lower side of the extending portion 323 after being inserted into the empty space between the two supporting portions 3241-2.

In one embodiment, the first strut 3241-1, the plurality of second strut 3241-2, and the plurality of third strut 3241-3 have different diameters, but the first strut 3241-3, The diameter of the second supporting portion 3241-2 is formed larger than the diameter of the second supporting portion 3241-2 and the diameter of the second supporting portion 3241-2 is formed larger than the diameter of the third supporting portion 3241-3 .

In one embodiment, the strut 3241 includes a plurality of means for deformation (i.e., a first strut 3241-1, a plurality of second struts 3241-2, and a plurality of third struts 3241-1, 3241-3) absorbs the impact in a plurality of stages, thereby making it possible to have a more improved shock absorbing capability.

In one embodiment, when the impact is applied to the first strut 3241-1 and the second strut 3241-2 having different crushing thresholds above the respective threshold values, the strut 3241 sequentially applies an impact The first strut 3241-1 may be broken and then the second strut 3241-2 may be broken.

The elastic portion 3242 is formed of a material having elasticity (for example, a spring or the like), and extends in the direction of the extension portion 323 and the fastening portion 325 so as to absorb an impact applied to the boat body portion 100 As shown in FIG.

The fastening portion 325 is fixed to the lower side of the case portion 322 so as to cover the lower opening portion of the case portion 322 and is fastened to the boat body portion 100.

The impact absorbing portion 320 having the above-described structure absorbs impact when the boat body portion 100 collides with an obstacle such as a rock or the like during traveling, thereby preventing the boat body portion 100 from being damaged have.

In addition, in order to prevent the boat body portion 100 from being thrown out due to the elastic force, when the impact exceeds the crushing threshold of each configuration of the support portion 3241, the first support portion 3241-1 having the highest height, When the impact is not completely absorbed by the crushing of the first strut 3241-1, the plurality of second strut 3241-2 are sequentially crushed and the additional impact It is possible to prevent the elastic member from being thrown out by the elastic force.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims. You will understand.

10, 20: chemical spraying boat 100: boat body part
200: a medicine dispensing part 210: a medicine storage tank
220: injection nozzle 230: chemical pump
240: Spray control unit 250: Spray application unit
251: rotating sphere 252: dispersing blade
320: shock absorber 321:
322: Case portion 323: Extension portion
324: shock buffering part 325: fastening part

Claims (2)

A boat main body which autonomously travels in rice fields; And
And a medicine sprayer for spraying medicines contained in a medicine tank formed inside the boat main body through the spray nozzles provided on both sides of the rear end of the boat main body,
The boat main body part travels in accordance with the travel control signal received from the user controller, or autonomously travels within a predetermined area upon receipt of the GPS signal,
The medicine dispensing unit includes a medicine storage tank installed in the boat main body and storing medicines in an inner space; Two spray nozzles disposed on both sides of the rear end of the boat main body for spraying the medicine delivered from the medicine storage tank; A chemical pump for supplying a chemical contained in the chemical storage tank to the injection nozzle in response to a supply control signal for controlling chemical supply so that the chemical contained in the chemical storage tank can be injected through the chemical injection nozzle; A spray controller for generating a supply control signal for controlling the supply period of the medicine or the supply amount of the medicine by the medicine pump and transmitting the generated supply control signal to the medicine pump; And two spinning and spraying units connected to the rear end of the boat main body part by a plurality of frames and spreading the medicine sprayed through the spraying nozzle while rotating in accordance with the running speed of the boat main body part,
The dispensing control unit controls the supply amount of the medicine by the medicine pump in correspondence with the moving speed of the boat body part and measures the remaining amount of the medicine contained in the medicine storage tank. When the medicine is less than the predetermined capacity, And transmits it to the user controller,
The injection nozzle rotates in the direction in which the chemical liquid is injected by 360 degrees,
Wherein the rotary spraying unit is formed in a circular shape and is spaced at a predetermined interval from the rear end of the boat body by a plurality of frames so that the rotation axis coincides with the chemical spraying direction of the spraying nozzle; And a blade having a predetermined height extending from the front end to the rear end of the rotating sphere along the outer side in a spiral direction and rotating the rotating sphere with a flow of air due to the movement of the boat body and a friction force with the vane, And a dispersing wing for dispersing the medicament injected through the injection nozzle while rotating the wing in a direction perpendicular to the rotation axis of the rotation spheres.


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