JP6454318B2 - Multicopter - Google Patents

Description

  The present invention relates to a multicopter, and more particularly to a multicopter used for drug distribution or the like.

  As an example of this type of prior art, Patent Document 1 discloses a multi-rotor aircraft including four propellers that are connected to an output shaft of an electric motor and generate thrust.

JP2015-137092A

  As shown in Patent Document 1, in general, in a multicopter, a plurality of the same rotors are arranged at equidistant positions from the center of the multicopter in plan view. For this reason, the same flight can be performed in any of the front, rear, left, and right directions, but it is difficult to make an agile movement (such as a sudden change of direction) in a specific direction (such as the front-rear direction or the left-right direction).

  Therefore, a main object of the present invention is to provide a multicopter that can fly in any direction, front, back, left, and right, and can move quickly in a specific direction.

  To achieve the above object, a plurality of rotors provided at the apexes of six or more even polygons in plan view are provided, and the plurality of rotors include a plurality of single rotors and at least two or more sets of coaxial counter rotating rotors. In the plan view, the plurality of rotors are arranged symmetrically with respect to the first line extending back and forth through the center point of the even-numbered polygon, and left and right so as to be orthogonal to the first line and the first line A multicopter is provided that is arranged at least one in a region defined by a second line extending in the direction.

  In the present invention, in the plan view, the plurality of rotors are arranged in line symmetry with respect to the first line and are arranged at least one in a region partitioned by the first line and the second line. The rotor can be arranged in four directions from the center, and flight is possible in any of the front, rear, left and right directions. In addition, since one set of coaxial counter-rotating rotors can provide an output (thrust) greater than that of one single rotor, the two sets of coaxial counter-rotating rotors can be agile in the linear direction connecting the two sets of coaxial counter-rotating rotors. Move quickly and change direction quickly.

  Preferably, the even polygon is a hexagon, and two sets of coaxial counter rotating rotors are arranged on the second line in plan view. In this case, agile movement in the left-right direction can be achieved by the two sets of coaxial contra-rotating rotors arranged at the left and right symmetrical positions through which the second line passes.

  Preferably, the even polygon is a hexagon, and two sets of coaxial counter rotating rotors are arranged at two diagonal pairs of symmetrical positions passing through a point on the first line in plan view. In this case, the two pairs of coaxial counter-rotating rotors provided at each of the two diagonal pairs of symmetrical positions passing through the points on the first line are agile in the diagonal direction connecting the two pairs of coaxial counter-rotating rotors. Can move. Also, by cooperating a total of four sets of coaxial counter rotating rotors provided at two diagonal pairs of symmetrical positions passing through the points on the first line, it is possible to move quickly in the front-rear direction.

  More preferably, the rotor diameter of the single rotor is larger than the rotor diameter of the coaxial counter rotating rotor. In the coaxial counter-rotating rotor, since two rotors adjacent in the vertical direction rotate in the opposite direction, the output (thrust) obtained per rotor is smaller than that of the single rotor. Therefore, by making the rotor diameter of the single rotor larger than the rotor diameter of the coaxial counter-rotating rotor, the rotor diameter of the single rotor and the rotor diameter of the coaxial counter-rotating rotor can be obtained with the same energy. The output (thrust) of the multicopter to be increased.

  Preferably, the rotor diameter of the coaxial counter rotating rotor is larger than the rotor diameter of the single rotor. By making the rotor diameter of the coaxial counter-rotating rotor larger than the rotor diameter of the single rotor, compared to the case where the rotor diameter of the coaxial counter-rotating rotor and the rotor diameter of the single rotor are the same, It is possible to move more agilely in the straight direction connecting the coaxial counter rotating rotor.

  Preferably, the apparatus further includes a spraying device including a plurality of nozzles for discharging a medicine, and the discharge port of each nozzle is located below the plurality of rotors in a side view, and is seen in a plan view on both the left and right sides of the first line. In each of the first regions formed by the arcs and tangents of the rotation trajectories of the rotor tips and the lines passing through the rotation axis of the foremost rotor and the rotation axis of the rearmost rotor, the discharge ports of the nozzles are provided. It is done. In this case, the two first regions are downwash strong wind areas. Moreover, downwash itself can be strengthened by using many rotors of 8 or more including two sets of coaxial counter rotating rotors. Therefore, by providing the discharge port of each nozzle located below the rotor in the first area, it is possible to spread the medicine on the strong downwash from above the field and spray it with a strong pressure, thereby suppressing the scattering of the medicine. Thus, it is possible to secure the amount of the drug attached to the object in the field.

  More preferably, the discharge port of each nozzle is provided so as not to overlap the rotation shaft of each rotor in plan view. By providing the discharge port of each nozzle so that it does not overlap the rotation axis of each rotor in plan view, i.e., except under the rotation axis of each rotor that does not become the strong wind area of the downwash, the medicine is made strong downwash. Can be sprayed well on top.

  Preferably, it further includes a plurality of rotor support portions that respectively support the rotors, and the discharge ports of the nozzles are provided except under the rotor support portions. By providing the discharge port of each nozzle except the lower part of the rotor support part which does not become the strong wind area of the down wash, the medicine can be satisfactorily sprayed on the strong down wash.

  Preferably, the apparatus further includes a plurality of drive sources for driving the respective rotors, wherein the drive sources and the rotor are provided on the same axis, and the discharge ports of the respective nozzles are provided except under the drive sources. By providing the discharge port of each nozzle except under the driving source that does not become the strong wind area of the downwash, the medicine can be well dispersed on the strong downwash.

  More preferably, the discharge ports of the respective nozzles are provided in a second region formed by connecting the rotation shafts of the respective rotors in plan view on both the left and right sides of the first line. Since the second area in the first area is an area where downwash is stronger, by providing the discharge ports of the respective nozzles in the second area, the medicine can be sprayed on the stronger downwash. Further, it is possible to further ensure the adhesion amount of the drug to the object in the field by suppressing the scattering of the drug.

  Preferably, the discharge ports of the plurality of nozzles are arranged so as to be line symmetric with respect to the first line. In this case, it is possible to suppress the occurrence of uneven drug adhesion to the object in the field.

  Preferably, the ejection port of each nozzle is arranged on the second line in plan view. Since the area on the second line is a stronger area of downwash, the discharge port of each nozzle is provided on the second line, so that the medicine can be sprayed on the stronger downwash.

  Preferably, in a plan view, the discharge ports of the nozzles are arranged other than on the second line, and the discharge ports of the nozzles are provided so that the direction and / or position thereof can be changed between forward and backward travel. In general, the rear region has a stronger downwash than the front region with respect to the traveling direction of the multicopter. Therefore, in a multicopter that sprays medicines when moving forward and backward without changing the front-rear direction over the field, if the nozzle outlets are placed on lines other than the second line, By making it possible to change the direction and / or position of the discharge port, it is possible to discharge the drug in consideration of the difference in downwash between the front area and the rear area with respect to the wind and traveling direction, and the drug can be applied to a strong downwash. It can be sprayed in the same way when moving forward and backward.

  Preferably, two or more nozzle outlets are arranged on both front and rear sides of the second line so as to be line-symmetric with respect to the second line, and the plurality of nozzles are arranged with respect to the traveling direction of the multicopter. A medicine can be discharged from the rear nozzle. As described above, the rear area has a stronger downwash than the front area with respect to the traveling direction of the multicopter. Therefore, when a total of four or more nozzles are arranged in a multi-copter that sprays medicines when moving forward and backward without changing the front-rear direction in the sky above the farm field, the nozzle outlet is set to the second line. Two or more nozzles can be arranged on both the front and rear sides of the second line so as to be symmetrical with each other, and a plurality of nozzles can be provided so that the medicine can be discharged from the nozzles on the rear side with respect to the traveling direction of the multicopter. . Thereby, it can switch so that a medicine may be ejected from the nozzle on the back side with respect to the advancing direction, and the medicine can be put on a strong downwash and sprayed in the same way at the time of forward movement and backward movement.

  Preferably, in a plan view, the discharge port of each nozzle is disposed in the rotation locus of each coaxial counter rotating rotor. Since the rotation trajectory of each coaxial counter-rotating rotor is an area where downwash is stronger, the discharge port of each nozzle is provided within the rotational trajectory of each coaxial counter-rotating rotor, thereby further reducing the drug. Can be sprayed on a wash.

  Preferably, each of the plurality of drive sources further drives each rotor, and the single rotor is provided in the vicinity of the lower portion of the drive source. When the distance between the nozzle outlet and the single rotor in the vertical direction is smaller, the medicine ejected from the nozzle outlet is more likely to ride downwash before spreading. Therefore, if the single rotor is provided near the lower part of the drive source, it is easy to arrange the nozzle so that the nozzle discharge port is close to the single rotor, and the medicine ejected from the nozzle discharge port can be washed down before spreading. It becomes easy to put. In addition, the amount of the drug attached to the object in the field can be increased by a synergistic effect with the coaxial counter rotating rotor having strong downwash.

  In the present invention, even when some of the rotors are located on the first line, it is possible to satisfy the configuration “a plurality of rotors are arranged symmetrically with respect to the first line”. .

  According to the present invention, it is possible to obtain a multicopter that can fly in any direction, front, back, left, and right and can move quickly in a specific direction.

1 is a perspective view showing a multicopter according to an embodiment of the present invention. The multicopter which concerns on embodiment of FIG. 1 is shown, (a) is a top view solution figure, (b) is a front view solution figure, (c) is a side view solution figure. It is an illustration figure which shows the rotation direction of the rotor of the multicopter which concerns on embodiment of FIG. 1, a strong wind area, the position of the discharge outlet of a nozzle, etc. FIG. It is an illustration figure which shows the flow-velocity distribution in the height of 0 cm below a rotor (rotor lower surface) by the downwash of the multicopter which concerns on embodiment of FIG. It is an illustration figure which shows the flow-velocity distribution in the height of 10 cm below a rotor by the downwash of the multicopter which concerns on embodiment of FIG. It is an illustration figure which shows the flow-velocity distribution in the height of 30 cm below a rotor by the downwash of the multicopter which concerns on embodiment of FIG. It is an illustration figure which shows the flow-velocity distribution in the height of 50 cm below a rotor by the downwash of the multicopter which concerns on embodiment of FIG. It is an illustration figure which shows the flow-velocity distribution in the height of 70 cm below a rotor by the downwash of the multicopter which concerns on embodiment of FIG. It is an illustration figure which shows the flow-velocity distribution in the height of 90 cm below a rotor by the downwash of the multicopter which concerns on embodiment of FIG. It is a perspective view which shows the multicopter which concerns on other embodiment of this invention. The multicopter which concerns on embodiment of FIG. 10 is shown, (a) is a top view solution figure, (b) is a front view solution figure, (c) is a side view solution figure. It is an illustration figure which shows the rotation direction of the rotor of the multicopter which concerns on embodiment of FIG. 10, a strong wind area, the position of the discharge outlet of a nozzle, etc. FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  Referring to FIGS. 1 and 2, a multicopter 10 according to an embodiment of the present invention includes a main support portion 12. The main support portion 12 includes a disc-shaped hub portion 14 and six columnar spoke portions 16, 18, 20, 22, 24, and 26. The spoke portions 16 to 26 are provided on the side surface of the hub portion 14 at substantially equal intervals (approximately 60 ° intervals) in the circumferential direction, and are formed to extend radially.

  Drive sources 28 and 30 are provided below the tip portions of the spoke portions 16 and 18, respectively, and drive sources 32a and 32b are provided above and below the tip portion of the spoke portion 20, respectively. Drive sources 34 and 36 are provided below the distal end portion of 24, and drive sources 38a and 38b are provided above and below the distal end portion of the spoke portion 26, respectively. In this embodiment, motors are used as the drive sources 28, 30, 32a, 32b, 34, 36, 38a and 38b.

  Drive sources 28 and 30 drive single rotor units 40 and 42, respectively, drive sources 32a and 32b drive coaxial counter rotating rotor unit 44, and drive sources 34 and 36 respectively single rotor units 46 and 48. , And the drive sources 38 a and 38 b drive the coaxial counter rotating rotor unit 50.

  Single rotor units 40, 42, 46, and 48 including one rotor include rotor support portions 40a, 42a, 46a, and 48a, and single rotors 40b, 42b, 46b, and 48b, respectively. The rotor support portions 40a, 42a, 46a and 48a extend in the vertical direction below the tip portions of the spoke portions 16, 18, 22 and 24, and are rotationally driven by the drive sources 28, 30, 34 and 36. The single rotors 40b, 42b, 46b and 48b are respectively supported by the lower end portions of the rotor support portions 40a, 42a, 46a and 48a and rotate together with the rotor support portions 40a, 42a, 46a and 48a. Here, the single rotors 40b, 42b, 46b and 48b are provided coaxially with the drive sources 28, 30, 34 and 36 in the vicinity of the lower portions of the drive sources 28, 30, 34 and 36, respectively. The rotor support portions 40a, 42a, 46a, and 48a, and rotor support portions 44a, 44b, 50a, and 50b, which will be described later, also function as rotating shafts of the rotor to be supported.

  The coaxial counter rotating rotor unit 44 including two rotors includes a set of rotor support portions 44a and 44b and a set of coaxial counter rotating rotors 44c and 44d. The rotor support portion 44a extends in the vertical direction above the tip portion of the spoke portion 20, and is rotationally driven by the drive source 32a. The coaxial counter rotating rotor 44c is supported by the upper end portion of the rotor support portion 44a and rotates together with the rotor support portion 44a. The rotor support portion 44b extends in the vertical direction below the tip portion of the spoke portion 20, and is rotationally driven by the drive source 32b. The coaxial counter rotating rotor 44d is supported by the lower end portion of the rotor support portion 44b and rotates together with the rotor support portion 44b. Similarly, the coaxial counter-rotating rotor unit 50 including two rotors includes a set of rotor support portions 50a and 50b and a set of coaxial counter-rotating rotors 50c and 50d. The rotor support portion 50a extends in the vertical direction above the tip portion of the spoke portion 26, and is rotationally driven by the drive source 38a. The coaxial counter rotating rotor 50c is supported by the upper end of the rotor support 50a and rotates together with the rotor support 50a. The rotor support portion 50b extends in the vertical direction below the tip portion of the spoke portion 26 and is driven to rotate by the drive source 38b. The coaxial counter rotating rotor 50d is supported by the lower end portion of the rotor support portion 50b and rotates together with the rotor support portion 50b. Here, the drive sources 32a, 32b, 38a and 38b are provided coaxially with the coaxial contra-rotating rotors 44c, 44d, 50c and 50d, respectively.

  Accordingly, the rotor support portions 40a, 42a, 44a, 44b, 46a, 48a, 50a and 50b are supported by the main support portion 12 via the drive sources 28, 30, 32a, 32b, 34, 36, 38a and 38b, respectively. Is done. The single rotors 40b, 42b, 46b, and 48b and the coaxial counter rotating rotors 44c, 44d, 50c, and 50d are driven by the drive sources 28, 30, 34, 36, 32a, 32b, 38a, and 38b, respectively. The shapes and dimensions of the single rotors 40b, 42b, 46b, 48b and the coaxial counter rotating rotors 44c, 44d, 50c, 50d are the same.

  As described above, the multicopter 10 includes four single rotors 40b, 42b, 46b, and 48b and two sets of coaxial counter rotating rotors 44c, 44d, 50c, and 50d, and is configured as a so-called hexacopter.

  2 and 3, in a plan view, these eight rotors are provided at the apex of the hexagon, and are lined with respect to the first line L1 extending forward and backward through the hexagonal center point P1. At least one is arranged in a region that is symmetrically arranged and defined by the first line L1 and the second line L2 extending in the left-right direction so as to be orthogonal to the first line L1. The center point P1 is a hexagonal center of gravity.

  Specifically, in plan view, the four single rotors 40b, 42b, 46b and 48b and the two sets of coaxial counter rotating rotors 44c, 44d and 50c, 50d have hexagonal shapes when the respective rotation centers are connected. Arranged to form. In plan view, the single rotors 40b, 42b, 46b, and 48b are arranged one by one in four regions defined by the first line L1 and the second line L2, and two sets of coaxial counter-rotating rotors 44c, 44d. 50c and 50d are arranged on the second line L2. In this embodiment, the second line L2 passes through the center point P1 in plan view. More specifically, in plan view, the respective rotation axes of the foremost single rotors 40b and 42b are arranged symmetrically with respect to the first line L1 in front of the second line L2, and the rearmost single rotor The rotational axes of 46b and 48b are arranged symmetrically with respect to the first line L1 behind the second line L2, and the respective rotational axes of the two sets of coaxial counter rotating rotors 44c, 44d and 50c, 50d. Is arranged on the second line L2. 3, the single rotors 40b and 46b and the coaxial counter rotating rotors 44d and 50c are rotated counterclockwise in a plan view, and the single rotors 42b and 48b and the coaxial counter rotating rotor 44c, 50d is rotated clockwise. Therefore, with respect to the single rotors 40b, 42b, 46b, and 48b, the rotors that are symmetric with respect to the center point P1 of the multicopter 10 have the same rotation direction.

  In addition, the multicopter 10 includes a spraying device 52 for spraying medicine on a farm field, an antenna 54 for transmitting and receiving wireless signals, and a control device (not shown) for controlling the operation of the multicopter 10. The chemical | medical agent said here means what is spread | dispersed to liquid or granular fields, such as a herbicide, a fertilizer, and water. The antenna 54 extends upward from the central portion of the main support portion 12, and the control device is accommodated in the main support portion 12. The spraying device 52 includes a tank 56 for storing a medicine, a plurality of arm-shaped pipes 58 and 60, a plurality of nozzles 62 and 64 for discharging the medicine, and a medicine in the tank 56 to each nozzle 62 and 64. And a pump 66 for pumping, and is provided below the main support portion 12. The tank 56 is supported by a support portion 68 that extends downward from the central portion of the hub portion 14. The pipes 58 and 60 are each formed in a substantially L shape, and extend radially from the side surface of the tank 56 and in the opposite directions along the second line L2. The nozzles 62 and 64 are provided at the tip portions of the pipes 58 and 60, respectively. The pump 66 is provided on the side surface of the tank 56. As shown in FIG. 2, the discharge ports 62a and 64a of the nozzles 62 and 64 are positioned on the second line L2 in a plan view and are positioned below the eight rotors in a side view. Therefore, the medicine stored in the tank 56 is discharged downward from the discharge ports 62a and 64a of the nozzles 62 and 64 through the pipes 58 and 60.

  Here, FIGS. 4 to 9 show analysis results of the flow velocity distribution by the downwash of the multicopter 10. 4 shows a height of 0 cm below the rotor (rotor lower surface), FIG. 5 shows a height of 10 cm below the rotor, FIG. 6 shows a height of 30 cm below the rotor, FIG. 7 shows a height of 50 cm below the rotor, FIG. Fig. 9 shows the wind speed distribution in the downward direction at a height of 70 cm below the rotor, and Fig. 9 at a height of 90 cm below the rotor. The rotor here is a single rotor 42b. As an analysis condition, it was assumed that the multicopter 10 was flying forward and in the horizontal direction at a flight speed of 20 km / h. 4-9, the magnitude of the wind speed in the downward direction is indicated by black and white shading, and the wind speed increases, that is, the downwash becomes stronger as the color becomes darker.

  A description will be given with reference to FIGS. In plan view on the left side of the first line L1, the arcs of the rotation trajectories S1, S2, S3 at the tips of the single rotor 42b, the coaxial counter rotating rotor 44c (44d), and the single rotor 46b are represented as arcs T1, T2, T3, respectively. To do. A common tangent line between the rotation trajectories S1 and S2 is a tangent line U1, and a common tangent line between the rotation trajectories S2 and S3 is a tangent line U2. A straight line passing through the rotation axis of the foremost single rotor 42b and the rotation axis of the rearmost single rotor 46b is defined as a line U3. As shown in FIG. 4, a first region R1 (shaded portion in FIG. 3) formed by arcs T1, T2, T3, tangents U1, U2, and line U3 is a strong wind area with strong downwash. Similarly, in a plan view on the right side of the first line L1, the arcs of the rotation trajectories S4, S5, and S6 at the tips of the single rotor 40b, the coaxial counter rotating rotor 50c (50d), and the single rotor 48b are represented by arcs T4 and T5. , T6. A common tangent line between the rotation trajectories S4 and S5 is a tangent line U4, and a common tangent line between the rotation trajectories S5 and S6 is a tangent line U5. A straight line passing through the rotation axis of the foremost single rotor 40b and the rotation axis of the rearmost single rotor 48b is defined as a line U6. A first region R2 (shaded portion in FIG. 3) formed by the arcs T4, T5, T6, the tangent lines U4, U5, and the line U6 is a strong wind area with strong downwash. Therefore, it is preferable that the discharge ports 62a and 64a of the nozzles 62 and 64 are provided in the first regions R1 and R2, respectively, in a plan view.

  Also, as shown in FIG. 4 to FIG. 6, it is formed by connecting the respective rotation axes of the single rotor 42 b, the coaxial counter rotating rotor 44 c (44 d), and the single rotor 46 b in a plan view on the left side of the first line L 1. The second region R3 (shaded area in FIG. 3) is a strong wind area with stronger downwash. Similarly, in the right side of the first line L1, the second region R4 (in FIG. 3) formed by connecting the respective rotation axes of the single rotor 40b, the coaxial counter rotating rotor 50c (50d), and the single rotor 48b in plan view. The shaded area is a strong wind area with stronger downwash. 4 to 9, the downwash located in the second regions R3 and R4 in FIG. 4 forms an area surrounded by strong wind while moving to the rear of the multicopter 10 as it proceeds downward. Since the area surrounded by the strong winds becomes smaller as it goes further downward, when the medicine is discharged from the second regions R3 and R4, the medicine is prevented from being scattered outside the multicopter 10 in a plan view. It can be seen that the medicine can be reliably sprayed below the flight path of the multicopter 10. Therefore, it is more preferable that the discharge ports 62a and 64a of the nozzles 62 and 64 are provided in the second regions R3 and R4, respectively, in plan view.

  Further, as shown in FIG. 4, in a plan view on the left side of the first line L <b> 1, the inside of the rotation locus S <b> 2 (see FIG. 3) of the coaxial counter rotating rotor 44 c (44 d) is a strong wind area with strong downwash. Similarly, in a plan view on the right side of the first line L1, the inside of the rotation locus S5 (see FIG. 3) of the coaxial counter rotating rotor 50c (50d) is a strong wind area with strong downwash. Therefore, it is preferable that the discharge ports 62a and 64a of the nozzles 62 and 64 are provided in the rotation trajectories S2 and S5, respectively, in a plan view.

  Further, as shown in FIGS. 4, 6 and 7, the straight line passing through the rotation axis of the coaxial counter rotating rotor 44c (44d) and the rotation axis of the coaxial counter rotating rotor 50c (50d) in the plan view is down. It becomes a strong wind area with stronger wash. In other words, on the second line L2 in a plan view, it is a strong wind area with a stronger downwash. Therefore, it is preferable that the discharge ports 62a and 64a of the nozzles 62 and 64 are respectively provided on the second line L2 (particularly in the first regions R1 and R2) in plan view.

  As shown in FIGS. 4 and 5, the positions of the rotation axes of the single rotors 40b, 42b, 46b, 48b and the coaxial counter rotating rotors 44c, 44d, 50c, 50d in a plan view, that is, the rotor support portions 40a, 42a, Below 46a, 48a, 44a, 44b, 50a, 50b is not a downwash strong wind area. Further, below the drive sources 28, 30, 34, 36, 32a, 32b, 38a, 38b is not a downwash strong wind area. Therefore, the discharge ports 62a and 64a of the nozzles 62 and 64 do not overlap the positions of the rotation axes of the single rotors 40b, 42b, 46b, and 48b and the coaxial counter rotating rotors 44c, 44d, 50c, and 50d in a plan view. That is, it is preferable to be provided except under the rotor support portions 40a, 42a, 46a, 48a, 44a, 44b, 50a, 50b. Moreover, it is preferable that the discharge ports 62a and 64a of the nozzles 62 and 64 are provided except under the drive sources 28, 30, 34, 36, 32a, 32b, 38a, and 38b.

  In addition, the discharge ports 62a and 64a of the nozzles 62 and 64 are preferably arranged so as to be line symmetric with respect to the first line L1.

  Referring to FIG. 3, most preferably, in a plan view, the discharge port 62a of the nozzle 62 is located within the rotation locus S2 and on the center point P1 side and the second side from the rotation axis of the coaxial counter rotating rotor 44c (44d). It is provided in a region R5 located on the line L2. The region R5 is included in both the first region R1 and the second region R3. In plan view, the discharge port 64a of the nozzle 64 is provided in a region R6 located in the rotation locus S5 and on the second line L2 on the center point P1 side from the rotation axis of the coaxial counter rotating rotor 50c (50d). It is done. The region R6 is included in both the first region R2 and the second region R4. In this embodiment, the discharge ports 62a and 64a of the nozzles 62 and 64 are provided at positions R5a and R6a in the regions R5 and R6, respectively, in plan view.

  According to the multicopter 10, the plurality of (eight in this embodiment) rotors are arranged symmetrically with respect to the first line L1 and are partitioned by the first line L1 and the second line L2 in plan view. Since at least one is arranged in the region, the rotor can be arranged in four directions from the center of the multicopter 10, and flight is possible in any of the front, rear, left and right directions. Further, since one set of coaxial counter rotating rotors can provide an output (thrust) greater than that of one single rotor, two sets of coaxial counter rotating rotors 44c, 44d and 50c, 50d provide two sets of coaxial counter rotating coils. It is possible to move quickly in the linear direction connecting the rotors 44c, 44d and 50c, 50d, and the direction can be changed quickly.

  The two sets of coaxial contra-rotating rotors 44c, 44d and 50c, 50d arranged at the left and right symmetrical positions through which the second line L2 passes can make an agile movement in the left-right direction. Therefore, when the multicopter 10 sprays the medicine while reciprocating over the field without changing the front-rear direction, the multicopter 10 moves from the forward path to the return path and from the return path to the next outbound path (to the left and right directions). You can move quickly.

  The two first regions R1 and R2 are downwash strong wind areas. Further, by using as many as eight rotors including two sets of coaxial counter rotating rotors 44c and 44d and 50c and 50d, the downwash itself can be strengthened. Therefore, by providing the discharge ports 62a and 64a of the nozzles 62 and 64 located below the eight rotors in the first regions R1 and R2, the medicine is placed on a strong downwash and sprayed with a strong pressure. It is possible to suppress the scattering of the medicine and secure the amount of the medicine attached to the object in the field.

  The discharge ports 62a and 64a of the nozzles 62 and 64 do not overlap with the rotation shafts of the rotors (single rotors 40b, 42b, 46b and 48b and coaxial counter rotating rotors 44c, 44d, 50c and 50d) in plan view. That is, by providing the medicine except for the lower part of the rotation shaft of each rotor (single rotors 40b, 42b, 46b, 48b and coaxial counter rotating rotors 44c, 44d, 50c, 50d) that does not become a strong wind area of the down wash, It can be sprayed well on a strong downwash.

  By providing the discharge ports 62a and 64a of the nozzles 62 and 64 except for the lower portions of the rotor support portions 40a, 42a, 46a, 48a, 44a, 44b, 50a, and 50b that do not serve as downwash strong wind areas, It can be sprayed well on a strong downwash.

  By providing the discharge ports 62a and 64a of the nozzles 62 and 64 except for the lower side of the drive sources 28, 30, 34, 36, 32a, 32b, 38a, and 38b that do not become the strong wind area of the down wash, the medicine is strengthened. Can be sprayed well on downwash.

  Since the second regions R3 and R4 in the first regions R1 and R2 are areas with stronger downwash, by providing the discharge ports 62a and 64a of the nozzles 62 and 64 in the second regions R3 and R4, respectively. The medicine can be sprayed on a stronger downwash, and the amount of the medicine attached to the object in the field can be further secured by suppressing the scattering of the medicine.

  By arranging the discharge ports 62a and 64a of the nozzles 62 and 64 so as to be line-symmetric with respect to the first line L1, it is possible to suppress the occurrence of uneven drug adhesion to the object in the field.

  Since the area on the second line L2 is a stronger downwash area, the discharge ports 62a and 64a of the nozzles 62 and 64 are provided on the second line L2, so that the medicine is placed on the stronger downwash. Can be sprayed.

  The rotation trajectory S2 of the coaxial counter-rotating rotor 44c (44d) and the rotation trajectory S5 of the coaxial counter-rotating rotor 50c (50d) are areas with a stronger downwash, so the discharge ports 62a of the nozzles 62, 64 are provided. 64a are provided in the rotation trajectories S2 and S5, so that the medicine can be sprayed on a stronger downwash.

  The smaller the distance in the vertical direction between the discharge ports 62a, 64a of the nozzles 62, 64 and the single rotors 40b, 42b, 46b, 48b, the medicine ejected from the nozzles 62, 64 gets downwashed before spreading. Cheap. Therefore, when the single rotors 40b, 42b, 46b, and 48b are provided near the lower portions of the drive sources 28, 30, 34, and 36, the discharge ports 62a and 64a of the nozzles 62 and 64 are close to the single rotors 40b, 42b, 46b, and 48b. Thus, the nozzles 62 and 64 can be easily arranged, and the medicine ejected from the nozzles 62 and 64 can be easily put on the downwash before spreading. In addition, the amount of the drug attached to the object in the field can be increased by a synergistic effect with the coaxial counter rotating rotors 44c, 44d, 50c, 50d having strong downwash.

  Referring to FIGS. 10 and 11, a multicopter 10 a according to another embodiment of the present invention, like the multicopter 10, has a main support having a disk-shaped hub portion 14 and six columnar spoke portions 16 to 26. Part 12 is included.

  Drive sources 100a and 100b are provided above and below the tip of the spoke part 16, respectively, and drive sources 102a and 102b are provided above and below the tip of the spoke part 18, respectively. A drive source 104 is provided below the tip portion, drive sources 106a and 106b are provided above and below the tip portion of the spoke portion 22, and a drive source is provided above and below the tip portion of the spoke portion 24. Sources 108 a and 108 b are provided, and a drive source 110 is provided below the tip of the spoke portion 26. In this embodiment, motors are used as the drive sources 100a, 100b, 102a, 102b, 104, 106a, 106b, 108a, 108b and 110.

  The drive sources 100a and 100b drive the coaxial counter-rotating rotor unit 112, the drive sources 102a and 102b drive the coaxial counter-rotating rotor unit 114, and the drive source 104 drives the single rotor unit 116. The sources 106 a and 106 b drive the coaxial counter rotating rotor unit 118, the driving sources 108 a and 108 b drive the coaxial counter rotating rotor unit 120, and the driving source 110 drives the single rotor unit 122.

  The coaxial counter rotating rotor unit 112 including two rotors includes a set of rotor support portions 112a and 112b and a set of coaxial counter rotating rotors 112c and 112d. Similarly, the coaxial counter-rotating rotor unit 114 including two rotors includes a set of rotor support portions 114a and 114b and a set of coaxial counter-rotating rotors 114c and 114d. The coaxial counter-rotating rotor unit 118 including two rotors includes a set of rotor support portions 118a and 118b and a set of coaxial counter-rotating rotors 118c and 118d. The coaxial counter-rotating rotor unit 120 including two rotors includes a set of rotor support portions 120a and 120b and a set of coaxial counter-rotating rotors 120c and 120d. Since the coaxial counter-rotating rotor units 112, 114, 118, and 120 are configured in the same manner as the coaxial counter-rotating rotor unit 44 in the multicopter 10, the overlapping description thereof will be omitted. Single rotor units 116 and 122 having one rotor include rotor support portions 116a and 122a and single rotors 116b and 122b, respectively. Since the single rotor units 116 and 122 are configured in the same manner as the single rotor unit 40 in the multicopter 10, their overlapping description is omitted. The shapes and dimensions of the single rotors 116b and 122b and the coaxial counter rotating rotors 112c, 112d, 114c, 114d, 118c, 118d, 120c, and 120d are the same.

  As described above, the multicopter 10a includes two single rotors 116b and 122b and a total of four sets of coaxial counter rotating rotors 112c, 112d, 114c, 114d, 118c, 118d and 120c, 120d, and is configured as a so-called hexacopter. The

  Referring to FIG. 10 and FIG. 11, in plan view, these ten rotors are provided at the apex of the hexagon and are lined with respect to the first line L3 that extends back and forth through the hexagonal center point P2. At least one is arranged in a region that is symmetrically arranged and defined by the first line L3 and the second line L4 extending in the left-right direction so as to be orthogonal to the first line L3. The center point P2 is a hexagonal center of gravity.

  Specifically, in plan view, the two single rotors 116b and 122b and the four sets of coaxial counter rotating rotors 112c, 112d, 114c, 114d, 118c, 118d and 120c, 120d connect the respective rotation centers. And hexagons are formed. In plan view, four sets of coaxial contra-rotating rotors 112c, 112d, 114c, 114d, 118c, 118d and 120c, 120d are set in four regions defined by the first line L3 and the second line L4 ( Two rotors) are arranged. That is, in plan view, two pairs of coaxial counter rotating rotors 112c, 112d and 118c, 118d, and two pairs of symmetrical counterclockwise positions passing through a point on the first line L3 (here, the center point P2), and Two sets of coaxial counter rotating rotors 114c, 114d and 120c, 120d are arranged. Further, the two single rotors 116b and 122b are arranged on the second line L4. More specifically, in plan view, the rotation axis of the frontmost set of coaxial counter rotating rotors 112c and 112d and the rotation axis of the pair of coaxial counter rotating rotors 114c and 114d are from the second line L4. The rotational axis of the last pair of coaxial counter rotating rotors 118c and 118d and the rotational axis of the pair of coaxial counter rotating rotors 120c and 120d are arranged symmetrically with respect to the first line L3 at the front, Behind the second line L4, it is arranged symmetrically with respect to the first line L3, and the respective rotation axes of the two single rotors 116b, 122b are arranged on the second line L4. Thus, the multicopter 10a has a configuration in which the single rotor unit and the coaxial counter rotating rotor unit in the multicopter 10 are interchanged. As shown by white arrows in FIG. 12, the single rotor 116b and the coaxial counter rotating rotors 112d, 114c, 118d, and 120c are rotated clockwise in a plan view, and the single rotor 122b and the coaxial counter rotating rotors 112c and 114d are rotated. , 118c, 120d are rotated counterclockwise.

  In addition, the multicopter 10a includes a spraying device 52 for spraying a medicine on a field, an antenna 54 for transmitting and receiving a radio signal, and a control device (not shown) for controlling the operation of the multicopter 10a. Since these are the same as those included in the multicopter 10, redundant description thereof is omitted. As shown in FIG. 11, the discharge ports 62a and 64a of the nozzles 62 and 64 included in the spraying device 52 are positioned on the second line L4 in a plan view and positioned below the ten rotors in a side view. To do.

  In such a downwash of the multicopter 10a, the same flow velocity distribution as that of the downwash of the multicopter 10 is shown.

  Referring to FIGS. 10 to 12, the front ends of the coaxial counter-rotating rotor 114 c (114 d), the single rotor 116 b, and the coaxial counter-rotating rotor 118 c (118 d) in plan view on the left side of the first line L <b> 3. The arcs of the rotation trajectories S7, S8, and S9 are arcs T7, T8, and T9. A common tangent line between the rotation trajectories S7 and S8 is a tangent line U7, and a common tangent line between the rotation trajectories S8 and S9 is a tangent line U8. A straight line passing through the rotation axis of the foremost coaxial counter rotating rotor 114c (114d) and the axis of rotation of the rearmost coaxial counter rotating rotor 118c (118d) is defined as a line U9. A first region R7 (shaded portion in FIG. 12) formed by the arcs T7, T8, T9, the tangent line U7, U8, and the line U9 is a strong wind area with strong downwash. Similarly, the rotation trajectories S10, S11, S12 of the respective tips of the coaxial counter rotating rotor 112c (112d), the single rotor 122b, and the coaxial counter rotating rotor 120c (120d) in plan view on the right side of the first line L3. Are arcs T10, T11, T12. A common tangent line between the rotation trajectories S10 and S11 is a tangent line U10, and a common tangent line between the rotation trajectories S11 and S12 is a tangent line U11. A straight line passing through the rotation axis of the foremost coaxial counter rotating rotor 112c (112d) and the rotation axis of the rearmost coaxial counter rotating rotor 120c (120d) is defined as a line U12. A first region R8 (shaded portion in FIG. 12) formed by the arcs T10, T11, T12, the tangents U10, U11, and the line U12 is a strong wind area with strong downwash. Therefore, it is preferable that the discharge ports 62a and 64a of the nozzles 62 and 64 are provided in the first regions R7 and R8, respectively, in plan view.

  Further, the second line formed by connecting the respective rotation axes of the coaxial counter rotating rotor 114c (114d), the single rotor 116b, and the coaxial counter rotating rotor 118c (118d) in plan view on the left side of the first line L3. A region R9 (shaded area in FIG. 12) is a strong wind area with stronger downwash. Similarly, in the plan view on the right side of the first line L3, the first rotating shaft 112c (112d), the single rotor 122b, and the coaxial counter rotating rotor 120c (120d) are connected to each other with a rotation axis. Two region R10 (shaded area in FIG. 12) is a strong wind area with stronger downwash. In addition, when the medicine is discharged from the second regions R9 and R10, the medicine is prevented from being scattered outside the multicopter 10a in a plan view, and the medicine can be reliably sprayed below the flight path of the multicopter 10a. Therefore, it is more preferable that the discharge ports 62a and 64a of the nozzles 62 and 64 are provided in the second regions R9 and R10, respectively, in plan view.

  Furthermore, in the plan view on the left side of the first line L3, the inside of the rotation locus S8 (see FIG. 12) of the single rotor 116b is a strong wind area with strong downwash. Similarly, the rotation locus S11 (see FIG. 12) of the single rotor 122b in a plan view on the right side of the first line L3 is a strong wind area with strong downwash. Therefore, it is preferable that the discharge ports 62a and 64a of the nozzles 62 and 64 are provided in the rotation trajectories S8 and S11, respectively, in a plan view.

  Further, a straight line passing through the rotation axis of the single rotor 116b and the rotation axis of the single rotor 122b in a plan view is a strong wind area where downwash is stronger. In other words, on the second line L4 in a plan view, a strong wind area with a stronger downwash is obtained. Therefore, it is preferable that the discharge ports 62a and 64a of the nozzles 62 and 64 are respectively provided on the second line L4 (particularly in the first regions R7 and R8) in plan view.

  The rotational axes of the single rotors 116b and 122b and the coaxial counter rotating rotors 112c, 112d, 114c, 114d, 118c, 118d, 120c, and 120d in plan view, that is, the rotor support portions 116a, 122a, 112a, 112b, 114a, Below 114b, 118a, 118b, 120a, and 120b is not a downwash strong wind area. Further, below the drive sources 104, 110, 100a, 100b, 102a, 102b, 106a, 106b, 108a, and 108b is not a downwash strong wind area. Accordingly, the discharge ports 62a and 64a of the nozzles 62 and 64 overlap the positions of the rotation shafts of the single rotors 116b and 122b and the coaxial counter rotating rotors 112c, 112d, 114c, 114d, 118c, 118d, 120c, and 120d in plan view. In other words, it is preferable to be provided except under the rotor support portions 116a, 122a, 112a, 112b, 114a, 114b, 118a, 118b, 120a, 120b. The discharge ports 62a and 64a of the nozzles 62 and 64 are preferably provided except under the drive sources 104, 110, 100a, 100b, 102a, 102b, 106a, 106b, 108a, and 108b.

  In addition, the discharge ports 62a and 64a of the nozzles 62 and 64 are preferably arranged so as to be line symmetric with respect to the first line L3.

  Referring to FIG. 12, most preferably, in a plan view, the discharge port 62a of the nozzle 62 is located in the rotation locus S8 and on the second line L4 on the center point P2 side from the rotation axis of the single rotor 116b. Provided in the region R11. The region R11 is included in both the first region R7 and the second region R9. In plan view, the discharge port 64a of the nozzle 64 is provided in a region R12 located in the rotation locus S11 and on the second line L4 side from the rotation axis of the single rotor 122b. The region R12 is included in both the first region R8 and the second region R10. In this embodiment, the discharge ports 62a and 64a of the nozzles 62 and 64 are provided at positions R11a and R12a in the regions R11 and R12, respectively, in plan view.

  According to the multicopter 10a, two sets of coaxial counter rotating rotors 112c, 112d and 118c, 118d provided at two diagonal pairs of symmetrical positions passing through a point on the first line L3, and two sets of coaxial double By the reversing rotors 114c, 114d and 120c, 120d, two pairs of coaxial counter rotating rotors 112c, 112d and 118c, 118d forming a pair, and a pair of coaxial rotating counter rotors 114c, 114d forming a pair. And 120c, 120d can be moved in an oblique direction. In addition, a total of four sets of coaxial counter rotating rotors 112c, 112d, 114c, 114d, 118c, 118d and 120c, 120d provided at two diagonal pairs of symmetrical positions passing through points on the first line L3 are allowed to cooperate. Can move quickly in the front-rear direction. Therefore, when the multicopter 10a sprays the medicine when moving forward and backward without changing the front-rear direction over the field, the multicopter 10a can quickly change direction from forward to backward (and from backward to forward). . Also, the multicopter 10a can obtain substantially the same effect as the multicopter 10.

  In the coaxial counter rotating rotor, since two adjacent rotors in the vertical direction rotate in the opposite direction, the output (thrust) obtained per rotor is smaller than that of the single rotor. Therefore, in the multicopters 10 and 10a, by making the rotor diameter of the single rotor larger than the rotor diameter of the coaxial counter-rotating rotor, the rotor diameter of the single rotor and the rotor diameter of the coaxial counter-rotating rotor are compared with the same case. Thus, the output (thrust) of the multicopter obtained with the same energy is increased. The rotor diameter means the diameter of a circle that is the rotation locus S of the rotor tip.

  Further, in the multicopters 10 and 10a, by making the rotor diameter of the coaxial counter-rotating rotor larger than the rotor diameter of the single rotor, the rotor diameter of the coaxial counter-rotating rotor is equal to that of the single rotor. Thus, it is possible to move more agilely in a linear direction connecting two pairs of coaxial counter rotating rotors.

  Further, in the multicopters 10 and 10a, the discharge ports of the nozzles are arranged on the plane other than the second line, and the direction and / or position of the discharge ports of the nozzles can be changed between forward and backward travel. It may be provided.

  In general, the rear region has a stronger downwash than the front region with respect to the traveling direction of the multicopter. Therefore, when the multicopters 10 and 10a are configured to spray the medicine at the time of advance and reverse without changing the front-rear direction without changing the front-rear direction over the field, and when the discharge ports of the respective nozzles are arranged outside the second line, By making it possible to change the direction and / or position of the nozzle outlet at the time of reverse travel and backward travel, the drug can be applied in consideration of the difference in downwash between the front region and the rear region with respect to the wind and the traveling direction. The medicine can be discharged, and can be sprayed in the same way when moving forward and backward by placing the drug on a strong downwash. This is particularly effective when one nozzle outlet is provided in each of the two first regions or the two second regions.

  In the multicopter 10 illustrated in FIG. 1, the two nozzles 62 and 64 are used. However, the present invention is not limited to this, and four nozzles may be used. In this case, referring to FIG. 3, in a plan view, the discharge ports of the two nozzles may be provided in the second region R3, and the discharge ports of the other two nozzles may be provided in the second region R4. preferable. More preferably, the discharge ports of the two nozzles are respectively disposed in the second region R3 and on both the front and rear sides of the second line L2. Further, the discharge ports of the other two nozzles are respectively disposed in the second region R4 on both the front and rear sides of the second line L2.

  In the multicopter 10a shown in FIG. 10, the two nozzles 62 and 64 are used. However, the present invention is not limited to this, and four nozzles may be used. In this case, referring to FIG. 12, in a plan view, the discharge ports of the two nozzles may be provided in the second region R9, and the discharge ports of the other two nozzles may be provided in the second region R10. preferable. More preferably, the discharge ports of the two nozzles are respectively disposed in the second region R9 and on both the front and rear sides of the second line L4. Further, the discharge ports of the other two nozzles are disposed in the second region R10 and on both the front and rear sides of the second line L4.

  In the multicopters 10 and 10a, it is preferable that the same number of nozzle outlets be arranged in areas with strong downwash on both the left and right sides of the first line so as to be symmetrical with respect to the first line extending in the front-rear direction. .

  Further, in the multicopters 10 and 10a, two or more nozzle outlets are arranged on the front and rear sides of the second line so as to be symmetrical with respect to the second line, and the plurality of nozzles are in the traveling direction of the multicopter. However, the medicine may be ejected from the nozzle on the rear side.

  As described above, the rear area has a stronger downwash than the front area with respect to the traveling direction of the multicopter. Therefore, when the multicopters 10 and 10a are configured to spray the medicine at the time of forward and backward movement without changing the front-rear direction over the farm field, and when a total of four or more nozzles are arranged, the nozzle discharge port Two or more on the front and rear sides of the second line so as to be line symmetric with respect to the second line, and a plurality of nozzles from the rear nozzle with respect to the traveling direction of the multicopter. By providing it so that it can be discharged, it can be switched to discharge the medicine from the nozzle on the rear side with respect to the traveling direction, and the medicine can be put on a strong downwash and sprayed in the same way at the time of forward movement and backward movement. .

  In each of the multicopters 10 and 10a, the dimensions of all the included rotors are the same. However, the present invention is not limited to this, and the rotor diameter in the vicinity of the nozzle outlet may be larger than the rotor diameters of the other rotors. Good. In this case, the medicine can be satisfactorily spread on a stronger downwash.

  In the multicopter 10, the two sets of coaxial counter rotating rotors 44c, 44d and 50c, 50d on the second line L2 may be arranged in front of or behind the center point P1.

  In the multicopter 10a, the single rotors 116b and 122b on the second line L4 may both be arranged in front of or behind the center point P2.

  In the multicopter according to the present invention, the even polygon is a hexagon, and two pairs of coaxial counter rotating rotors are arranged on the first line in plan view, and two pairs of diagonal symmetry passing through the points on the first line. A single rotor may be arranged at each position.

  In the multicopter according to the present invention, the even-numbered polygon is a hexagon, and in plan view, two single rotors are arranged on the first line, and 2 pairs of symmetrical positions passing through the points on the first line are 2 respectively. A set of coaxial counter rotating rotors may be arranged.

  In the multicopter according to the present invention, the even polygon is a hexagon, and the distance from the rotation axis of the coaxial counter rotating rotor to the center point may be longer or shorter than the distance from the rotation axis of the single rotor to the center point. Good.

  In the multicopter according to the present invention, the even polygon is an octagon, and four sets of coaxial counter rotating rotors may be arranged in the front-rear direction. That is, the rotors arranged at the two frontmost vertices and the two rearmost vertices of the octagon line-symmetric with respect to the first line may be four sets of coaxial counter rotating rotors.

  In the multicopter according to the present invention, the even polygon is an octagon, and four sets of coaxial counter rotating rotors may be arranged in the left-right direction. That is, four pairs of coaxial contra-rotations are arranged at four vertices excluding the two frontmost vertices and the two rearmost vertices in an octagon axisymmetric with respect to the first line. It may be a rotor.

  The present invention can be applied not only to a multicopter that moves forward and backward without changing the front-rear direction, but also to a multicopter that reciprocates by changing the direction of the aircraft.

  In the above-described embodiment, the rotor support portion also functions as the rotating shaft of the rotor, but is not limited thereto. You may comprise a rotor support part and the rotating shaft of a rotor as a separate member.

  In the above-described embodiment, the single rotor unit and the driving source for driving the single rotor unit are provided below the tip of the spoke part of the main support part. However, the present invention is not limited to this, and the tip part of the spoke part of the main support part. It may be provided above.

  In the above-described embodiment, the second line does not necessarily pass through the center point of the even polygon in plan view.

  The present invention can be applied to a multicopter including a plurality of rotors provided at the vertices of even-numbered polygons of 6 or more in plan view.

10, 10a Multicopter 12 Main support part 28, 30, 32a, 32b, 34, 36, 38a, 38b, 100a, 100b, 102a, 102b, 104, 106a, 106b, 108a, 108b, 110 Drive source 40b, 42b, 46b , 48b, 116b, 122b Single rotor 44c, 44d, 50c, 50d, 112c, 112d, 114c, 114d, 118c, 118d, 120c, 120d Coaxial counter rotating rotor 40a, 42a, 44a, 44b, 46a, 48a, 50a, 50b, 112a, 112b, 114a, 114b, 116a, 118a, 118b, 120a, 120b, 122a Rotor support 52 Dispersing device 62, 64 Nozzle 62a, 64a Discharge port L1, L3 First line L2, L4 Second line S1, S2, S 3, S4, S5, S6, S7, S8, S9, S10, S11, S12 Rotating locus T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12 Arc U1, U2, U4 , U5, U7, U8, U10, U11 Tangent lines U3, U6, U9, U12 Lines R1, R2, R7, R8 First region R3, R4, R9, R10 Second region R5, R6, R11, R12 region R5a, R6a , R11a, R12a Position P1, P2 Center point

Claims (15)

A plurality of rotors provided at the tops of even-numbered polygons of 6 or more in plan view, and a spraying device including a plurality of nozzles for discharging a medicine ;
The plurality of rotors include a plurality of single rotors and at least two or more sets of coaxial counter rotating rotors;
In a plan view, the plurality of rotors are arranged symmetrically with respect to a first line extending back and forth through a center point of the even polygon, and left and right so as to be orthogonal to the first line and the first line Arranged at least one in a region partitioned by a second line extending in the direction ,
In side view, the outlet of each nozzle is located below the plurality of rotors,
In plan view on both the left and right sides of the first line, the arc is formed by a circular arc and a tangent line of the rotation locus of each rotor tip, and a line passing through the rotation axis of the foremost rotor and the rotation axis of the last rotor. A multi-copter in which a discharge port of each nozzle is provided in the first region . The even polygon is a hexagon;
The multicopter according to claim 1, wherein two sets of the coaxial contra-rotating rotor are arranged on the second line in a plan view. The even polygon is a hexagon;
2. The multicopter according to claim 1, wherein two sets of the coaxial contra-rotating rotors are respectively disposed at two diagonal pairs of symmetrical positions passing through the points on the first line in a plan view.   The multicopter according to any one of claims 1 to 3, wherein a rotor diameter of the single rotor is larger than a rotor diameter of the coaxial counter rotating rotor.   The multicopter according to any one of claims 1 to 3, wherein a rotor diameter of the coaxial counter rotating rotor is larger than a rotor diameter of the single rotor. The multicopter according to any one of claims 1 to 5 , wherein, in a plan view, the discharge port of each nozzle is provided so as not to overlap a rotation shaft of each rotor. A plurality of rotor support portions for supporting each of the rotors;
The multi-copter according to any one of claims 1 to 6 , wherein a discharge port of each nozzle is provided except under the rotor support portion. A plurality of driving sources for driving each of the rotors;
The drive source and the rotor are provided on the same axis,
The multi-copter according to any one of claims 1 to 7 , wherein the discharge ports of the nozzles are provided except under the drive source. In plan view in the right and left sides of the first line, the in the second region formed by connecting the axis of rotation of each rotor, the discharge port of each nozzle is provided, according to any one of claims 1 to 8 Multicopter. The multicopter according to any one of claims 1 to 9 , wherein the discharge ports of the plurality of nozzles are arranged to be line-symmetric with respect to the first line. The multicopter according to any one of claims 1 to 10 , wherein the ejection port of each nozzle is disposed on the second line in plan view. In a plan view, the discharge ports of the nozzles are arranged other than on the second line,
The multi-copter according to any one of claims 1 to 10 , wherein the discharge port of each nozzle is provided so that its direction and / or position can be changed between forward and reverse. Two or more discharge ports of the nozzle are arranged on both front and rear sides of the second line so as to be line-symmetric with respect to the second line,
Wherein the plurality of nozzles are provided so as to be discharged to the medicament from the nozzle on the rear side with respect to the traveling direction of the Maruchikoputa, Maruchikoputa according to any one of claims 1 to 10. The multicopter according to any one of claims 1 to 13 , wherein the discharge port of each nozzle is disposed in a rotation locus of each coaxial counter rotating rotor in a plan view. A plurality of driving sources for driving each of the rotors;
The single rotor is provided near the lower portion of the driving source, Maruchikoputa according to any one of claims 1 to 7.