JP2510406B2 - Pesticide spraying device mounted on radio control helicopter - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pesticide spraying device mounted on a radio control helicopter capable of spraying pesticides on farms such as fields and rice fields.

[0002]

2. Description of the Related Art It has been proposed to apply agricultural chemicals to farms such as fields and rice fields by radio-controlled helicopters that are remotely operated by operators on the ground.
Japanese Patent No. 18784 discloses an agricultural chemical spraying device mounted on the radio controlled helicopter as shown in FIGS. 7 to 9.

That is, the radio-controlled helicopter pesticide spraying apparatus described in the above publication is the radio-controlled helicopter body 4
It is rotated via a shaft 24 in both the left and right pipe shafts 22 that are interlocked with the main mast 21 that is rotationally driven by the engine section C therein, and a gear box 23 that converts the rotational axis of the shaft 24 into a vertical direction. Drive shaft 25
And a double disk 80 that rotates integrally with the drive shaft 25 in the umbrella-shaped cover 14, and further, a chemical liquid tank 2 for storing agricultural chemicals installed on the left and right of the rear portion of the machine body 4 and a cock servo 16 for opening and closing. A liquid supply pipe 9 having a driven cock 15 and a drip nozzle 10 connected to the tip of the liquid supply pipe 9 and suspended near the center of the double disk 80 are provided.

According to the above-mentioned pesticide spraying apparatus, the double disk 80 is rotationally driven by the drive shaft 25 which is interlocked with the main mast 21 at the same time when the radio control helicopter starts to fly. Then, when the valve opening command is transmitted at the time when it reaches the farmland sky where the pesticide is sprayed, the cock servo 16 opens the cock 15, and the pesticide in the chemical liquid tank 2 is dropped through the liquid supply pipe 9 to the dropping nozzle. 10 is supplied to the double disk 80. The pesticide supplied to the double disk 80 is subjected to the centrifugal force due to the above rotation, and is discharged in the form of fine droplets from the outer peripheral portion of the double disk 80. That is, FIG.
As shown in FIG. 5, in the configuration of the conventional pesticide spraying apparatus, the chemical liquid supplied from the nozzle 15 to the double disc 80 moves from the inside to the outside in the gap of the double disc 80 by centrifugal force, and the double disc 80 The fine droplets M are discharged from the gap on the outer periphery of the.

[0005]

However, the radio-controlled helicopter has a limited loading capacity, and in order to be able to spray pesticides over a wide range of agricultural land with the same loading capacity, the chemical solution tank 2 must have as high a volume as possible. It is necessary to accommodate the concentration of the chemical solution, reduce the particle size of the droplet M discharged from the above-mentioned pesticide spraying device, and allow the double disk 80 to be sprayed uniformly over the entire circumference.

However, in the structure of the conventional pesticide spraying apparatus described above, since the chemical solution is discharged from the gap of the double disk 80, in order to form finer droplets under a certain rotation speed. The gap of the double disk 80 needs to be narrowed correspondingly, but if the gap is narrowed too much at this time, the chemical liquid cannot be sprayed at all, and its adjustment is very difficult.

Further, in the above-mentioned conventional structure, for example, the double disk 80 is tilted in accordance with the tilting motion of the vehicle body of the vehicle body 4 when the radio controlled helicopter turns, and the double nozzle 80 is moved from the dropping nozzle 10 to the double disk 80. Around the circumference of the double disc 80 due to factors such as a large amount of dropped pesticides moving in the tilt direction, or the movement of the chemical liquid to the outer periphery being obstructed by the influence of a very small amount of dust adhering to the double disc 80. Therefore, uneven discharge of the chemical solution often occurs.

The present invention has been proposed in view of the above conventional circumstances, and is a pesticide to be mounted on a flying body in which the particle size of the chemical solution to be sprayed is further miniaturized and the uneven spraying of the pesticide is suppressed. It is intended to provide a spraying device.

[0009]

In order to achieve the above object, the present invention employs the following means. That is, as shown in FIGS. 1 to 6, the chemical liquid tank 2 and the chemical liquid tank 2
In a pesticide spraying device mounted on a radio control helicopter, which comprises a spraying device 1 for spraying a chemical solution supplied from
The above-mentioned spraying device 1 is a multi-layer disc in which discs 8a, 8b ... Having a large number of saw teeth 81 formed on the outer periphery thereof are superposed along the drive shaft 25 disposed at the center thereof and with a predetermined gap therebetween. 8, a bottomed chemical solution supply hole 82 provided at the center of the multi-layer disk 8, and a chemical solution which is opened from the chemical solution supply hole 82 and is supplied from the chemical solution tank 2 to the multi-layer disk 8. 1 is a pesticide spraying device mounted on a radio control helicopter including a chemical liquid supply nozzle 10.

[0010]

According to the above structure, as shown in FIG. 5, the chemical liquid dropped from the medicine supply nozzle 10 into the medicine supply hole 82 at the center of the multi-layered disk 8 rotating at a predetermined speed is stored in the multi-layered disk 8.
The disk 8 forming the multi-layer disk 8 by the centrifugal force generated by the rotation of
Diffuse in a thin film shape toward the outer peripheral portion along the gaps a, 8b .... The chemical liquid that has reached the outer peripheral portions of the disks 8a, 8b ... Is further moved to the tips of the saw teeth 81 by centrifugal force, but is not discharged from the interval position A of the saw teeth 81 due to the surface tension of the chemical liquid. Therefore, the sawteeth 81 with a small area of adhesion of the chemical solution
The droplet M is discharged to the outside (strictly, in the tangential direction along the rotation direction) in a fine particle state only from the tip of the.

Further, the particle size of the discharged chemicals is determined by the size and shape of the sawteeth 81, the leaf surface tension of the chemicals, and the discs 8.
Since it depends only on the wettability with a, 8b, ..., It is determined regardless of the gap size of the multi-layer disk 8 and
Even if the amount of the chemical solution moving toward the outer peripheral portion of the multi-layered disc 8 varies in the circumferential direction, the particle size of the discharged droplets is uniform around the multi-layered disc 8.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an agricultural chemical spraying device mounted on a radio control helicopter according to the present invention will be described below with reference to the drawings.

FIG. 1 is an enlarged sectional view of an essential part of the embodiment, FIG. 2 is a perspective view of a radio control helicopter equipped with an embodiment according to the present invention, FIG. 3 is a front view of the same, and FIG. 4 is a piping system of the embodiment. 5 and 5 are explanatory views of the operation of the present invention.

As shown in FIGS. 2 to 4, a pair of left and right chemical liquid tanks 2 mounted on the body 4 of the radio control helicopter.
And a supporting rod 6 that protrudes in both left and right directions at the bottom of the machine body 4.
And the spraying device 1 suspended at the left and right ends of the support rod 6.
In addition, a cock 15 is interposed in the liquid supply pipe 9 that connects the chemical liquid tank 2 and the spraying device 1, and a cock servo 16 that opens and closes the cock 15 based on a command from the operator is provided. ing.

The spraying device 1 includes a motor 11 arranged so that the drive shaft 25 projects downward, and the motor 11
An umbrella-shaped cover 14 fixed to the lower surface and expanding below the liquid supply pipe 9 is introduced.

Further, as shown in FIGS. 1 (a) and 1 (b), the spraying device 1 is provided with a large number of saw teeth 81 on the outer periphery so as to be covered by the umbrella-shaped cover 14, and the drive shaft 25 There is provided a multi-layered disc 8 in which a lower layered disc 8a fixed to the tip portion and an upper layered disc 8b similarly having saw teeth 81 are layered along the drive shaft 25.

An upper disk 8b and a pressing plate 85 arranged on the uppermost layer are screwed to the disk 8a by screws 86, whereby the whole multi-layer disk 8 is driven by the drive shaft 2.
It is adapted to be rotationally driven by 5. Further, a spacer 87 is formed so as to be raised only around the places where the screws 86 of the disks 8a and 8b are inserted, so that a predetermined gap is maintained between the disks 8a and 8b. However, as described below, the spacer 87 seals the entire gap as shown in the left half of FIG. 1 (FIG. 5) so that the chemical liquid can diffuse from the center to the end along the gap between the disks 8a and 8b. However, it is limited to only the periphery of the insertion portion of the screw 86, and the other portions are configured such that the gaps communicate in the radial direction as shown in the left half of FIG.

It should be noted that the drive shaft 2 is attached to each of the disks 8a and 8b.
5, a concave groove 83 that is depressed downward at a position closer to the outer periphery by a predetermined diameter than the axis of the shaft 5, and is inclined downward at an angle corresponding to the outer shape of the umbrella-shaped cover 14 in the portion from the outer edge of the concave groove 83 to the outer peripheral portion. And the concave groove 8 is provided.
It is desirable that the 3 and the inclined portion 84 are formed in order to achieve the operations and effects described later, but they are not essential configurations in the present invention and can be omitted.

Further, the central portions of the disc 8b and the pressing plate 86 are respectively hollowed out so as to have a diameter larger than that of the drive shaft 25, so that the chemical liquid supply port 82 whose bottom is the disc 8a of the lowermost layer is formed in the center of the multi-layer disc 8. Is formed, and the chemical solution supply nozzle 10 opened into the chemical solution supply hole 82 and introduced into the umbrella-shaped cover 14 is disposed.

Liquid supply pipe 9 in the pesticide spraying device having the above-mentioned structure
The cock 15 interposed in the valve is normally set to a closed state, and when the radio-controlled helicopter equipped with the pesticide spraying device reaches the agricultural land sky to be sprayed, the motor 11 is turned on by remote control from the ground. At the same time, the cock 15 is opened through the cock servo 16.

In response to this, as shown in FIG. 5, the pesticide in the chemical liquid tank 2 flows down through the liquid supply pipe 9, and the chemical liquid supply nozzle 1
0 to the medicine supply hole 82 in the center of the multi-layered disc 8 and toward the outer periphery along the gaps between the discs 8a and 8b and the gaps between the discs 8b and the pressing plate 85 by the centrifugal force generated by the rotation of the discs 8a and 8b. Diffuse into a thin film. Each disk 8a,
The chemical solution that has reached the outer peripheral portion of 8b is further moved to the tips of the saw teeth 81 by centrifugal force, but is not discharged from the interval position A of the saw teeth 81 due to the surface tension of the chemical solution. Therefore, the liquid medicine is discharged in the form of fine particles like the liquid droplets M only from the tips of the saw teeth 81 having a small area where the liquid medicine is attached. Therefore, the particle size of the droplet M is significantly smaller than that in the case of being ejected from the outer peripheral surface of a simple disk without the saw teeth 81 as in the conventional example.

Moreover, the particle size of the discharged chemicals is determined by the size and shape of the saw teeth 81, the surface tension of the chemicals and the disk 8
Since it depends only on the wettability with a and 8b, even if the amount of the chemical solution moving toward the outer peripheral portions of the disks 8a and 8b is slightly uneven in the circumferential direction, the droplet M discharged The particle size is uniform around the circumference of the multilayer disc 8.

Moreover, the particle size of the droplets is determined by the disks 8a, 8a.
Since the gap between b and the disk 8b and the holding plate 85 is also unrelated (however, it is preferable that the gap be small to some extent), the adjustment work of the gap becomes unnecessary, and the spraying device 1 can be easily assembled. Become.

Further, in this embodiment, each of the above-mentioned disks 8a, 8
The chemical liquid in the middle of diffusing on the upper surface of b is temporarily stored in the groove 83, albeit slightly, temporarily.
The unevenness of the liquid amount generated in the circumferential direction of a and 8b is buffered. Further, the chemical solution is discharged downward at a predetermined angle along the inclination direction of the inclined portion 84, so that the effective spraying area is slightly suppressed from varying due to the influence of wind.

As described above, according to this embodiment, when the multi-layer disk 8 is rotated at a predetermined rotation speed, the particle size of the chemical liquid discharged becomes smaller than that of the conventional product, and the spraying device Since the uneven spraying around the circumference is prevented, it is possible to spray the agricultural chemical over a wider range of agricultural land with one flight of the radio-controlled helicopter, and the working efficiency associated with the spraying is significantly improved.

In the above embodiment, two disks 8 are used.
Although the multi-layered disk 8 is configured by a and 8b, as shown in FIG. 5, by spreading three or more (4 in the illustrated example) disks 8a to 8d based on the completely same configuration, it is possible to spread the layers. There is an effect that the amount can be increased. Further, in any of the embodiments shown in FIGS. 1 and 5, if the amount of the chemical liquid supplied from the nozzle 10 is the same, the particle diameter of the chemical liquid can be reduced by increasing the rotation speed.

[0027]

As described above, in the present invention, the chemical liquid that diffuses in a thin film toward the outer peripheral portion due to the centrifugal force due to the rotation of each disk is aggregated at each saw tooth tip due to the centrifugal force, and from the saw tooth tip. Since the droplets are discharged while being swung out of the spraying device, even if the amount of the chemical liquid that diffuses toward the outer peripheral portion is small in the circumferential direction of the disc, the droplet diameter becomes small. The particle size of the discharged droplet becomes uniform around the circumference of the multi-layer disc.

Further, since the particle diameter of the droplets is not related to the gap of the disc, the work for adjusting the gap is unnecessary, and the assembling of the spraying device can be facilitated. Therefore, it is possible to spray the chemical solution evenly with a small particle size, and it is possible to spray agricultural chemicals over a wider range of agricultural land with one flight of the radio-controlled helicopter, and there is an effect that the working efficiency associated with the spraying is significantly improved. .

[Brief description of drawings]

FIG. 1 is a main part configuration diagram of an embodiment according to the present invention.

FIG. 2 is a perspective view of one embodiment according to the present invention.

FIG. 3 is a front view of an embodiment according to the present invention.

FIG. 4 is a piping system diagram of an embodiment according to the present invention.

FIG. 5 is an explanatory diagram showing the operation of the present invention.

FIG. 6 is a vertical sectional side view of a main part of another embodiment according to the present invention.

FIG. 7 is a front view of a conventional example.

FIG. 8 is a piping system diagram of a conventional example.

FIG. 9 is a vertical sectional side view of a main part of a conventional example.

FIG. 10 is an explanatory diagram showing a problem of the conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spraying device 2 Chemical liquid tank 8 Multilayer disk 8a, 8b Umbrella disk 10 Chemical solution supply nozzle 81 Saw tooth 25 Drive shaft 82 Chemical solution supply hole

Claims (1)

(57) [Claims] 1. A pesticide spraying device mounted on a radio control helicopter, comprising: a chemical liquid tank; and a spraying device for spraying a chemical liquid supplied from the chemical liquid tank, wherein the spraying device has a large number of saw teeth formed on its outer peripheral portion. A multi-layered disc in which the discs are layered along a drive shaft arranged in the center of the multi-layered disc with a predetermined gap therebetween, and a bottomed chemical solution supply hole provided in the center of the multi-layered disc; A pesticide spraying apparatus mounted on a radio-controlled helicopter, comprising: a chemical solution supply nozzle that opens to a chemical solution supply hole and supplies the chemical solution supplied from a chemical solution tank to the multi-layer disc.