JP6535424B1 - Lift generating device - Google Patents

Abstract

A lift generation device using a Coanda effect is provided, which can generate a high output lift without using a high output motor, a large motor or the like. SOLUTION: Air taken in from a first intake port 203 by a blower 200 passes a first cylindrical body 240, and a third exhaust port 266 along an inner circumferential surface of a second cylindrical body 260 that generates a Coanda effect. Discharged from The first air inlet 203 is provided in the vicinity of the air outlet 262 of the second cylindrical body 260. [Selected figure] Figure 4

Description

  The present invention relates to a flying object, and more particularly to a lift generating device provided to a flying object capable of hovering flight.

  Hitherto, a flying object capable of hovering flight, that is, a so-called drone lift generating device using an air flow amplified by the Coanda effect is known (for example, see Patent Document 1).

JP, 2017-213951, A

  However, although the air flow is amplified by the Coanda effect in this way, it is necessary to mount a high output motor etc. in order to obtain stable lift for flying the drone. In the case of the motor etc., the consumption of the battery is heavy because the power consumption is large, and since the motor etc. tends to be large, there is a problem that the drone flightable time becomes short.

  SUMMARY OF THE INVENTION In view of the above-described circumstances, the present invention has an object to provide a lift generating device for a flying object capable of obtaining stable lift without using a high output motor with large power consumption or a large motor. Do.

In order to achieve the above object, according to the present invention, an air flow higher than an air flow flowing in a predetermined direction from the upstream opening toward the downstream opening is generated in the predetermined direction by the Coanda effect , and the predetermined direction is generated. Is a lift generating device having a first cylindrical body capable of generating lift in a direction opposite to that of the lift, the lift generating device having a blower mechanism for generating an air flow flowing in the predetermined direction, the blower mechanism The air is blown toward the exhaust air from the air intake, and the exhaust air is provided on the inner peripheral surface of the first cylindrical body in the vicinity of the upstream opening, and the air is blown from the air blowing mechanism. been air, the are those capable of generating the Coanda effect by blowing along the inner peripheral surface of the first cylindrical body as an air stream flowing in a predetermined direction, the intake portion of the downstream opening the neighboring Provided on the inner peripheral surface of one cylinder, characterized in that it is sucked capable constituting a part of the air flow.

  With this configuration, negative pressure can be generated on the downstream side of the air flow flowing in the predetermined direction, and the air flow amount flowing in the predetermined direction can be further increased.

  In addition, a second cylindrical body is provided between the air blowing mechanism and the exhaust port, and the second cylindrical body is configured to send an air flow equal to or greater than the air flow blown from the air blowing mechanism to the exhaust portion by the Coanda effect. You may make it generate toward.

  By configuring in this manner, the air flow rate fed into the first cylindrical body can be increased. That is, the air delivered from the blower mechanism can be amplified in two steps.

  According to the present invention, in the lift generating device using the Coanda effect, it is possible to generate stable lift without using a high output motor with a large power consumption or a large motor.

It is a perspective view of the fire drone in this embodiment. It is a top view of the fire drone in this embodiment. It is a side view and a perspective view showing a lift generation unit. It is AA sectional drawing of FIG. It is a schematic diagram showing operation of a support of a lift generation unit. It is the schematic which shows the flow of the air in a lift generation | occurrence | production unit. It is a bottom view of the fire drone in this embodiment. It is a side view showing a career unit. It is a side view which shows operation | movement of a carrier unit. It is a figure which shows the application example of the drone for fire fighting in this embodiment. It is the schematic which shows another example of a lift generation | occurrence | production unit. It is a figure which shows the application example of the fire drone in this embodiment. It is a figure which shows another form of the drone for fire fighting in this embodiment.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values and the like in this embodiment are merely examples for facilitating the understanding of the invention, and the present invention is not limited unless otherwise specified.

  FIG. 1 shows an embodiment in which the present invention is applied to a flying object for firefighting, so-called fire drone.

  As shown in FIG. 1, the firefighting drone 1 in the present embodiment includes a main body unit 10, and four lift generating units 20 are provided on the outer peripheral side surface of the main body unit 10. The number of installed lift generation units 20 is not particularly limited as long as it is four or more, and various numbers may be adopted according to the specifications of the fire drone.

  The four lift generating units 20 are connected to the outer peripheral side surface of the main body unit 10 at predetermined intervals (for example, 90 degrees in the present embodiment) as shown in FIG. Further, a carrier unit 30 is provided below the main body unit 10. Various types of nozzles and hoses can be connected to the carrier unit 30, and the carrier unit 30 is detachably fixed to the bottom of the main unit by a mounting portion 31 (not shown).

  The main unit 10 can transmit / receive a predetermined operation signal or radio wave, an electronic control unit 102 provided with at least a CPU as a central processing unit, various storage devices such as a RAM / ROM, etc. inside a substantially disk-shaped main unit 101. A transmission / reception unit 103, a battery 104 for supplying power, and the like are incorporated. The electronic control unit 102 is configured to be able to control the operations of the lift generation unit 20 and the carrier unit 30 according to a predetermined operation signal or the like received from the transmission / reception unit.

  The lift generation unit 20 has the air blower 200, the support body 220, the 1st cylindrical body 240, and the 2nd cylindrical body 260, as shown to FIG. 3, FIG.

  As shown in FIG. 4, the blower 200 includes a blower case 201 and a rotation mechanism unit 202 housed in the blower case 201 and controlled to be capable of rotational operation by the electronic control unit 102.

  The blower case 201 is a hollow cylindrical body having a storage space inside as shown in FIG. 4, and the second cylindrical body 260 is a cylindrical body having a substantially cylindrical shape as shown in FIG. 4. The second cylindrical body 260 is provided with a first intake port 203 which is formed in a long groove annular shape along the inner peripheral surface and communicates with the storage space of the blower case 201 and sucks air into the storage space. Further, the air blowing case 201 is provided with a first exhaust port 204 for delivering the air sucked from the first air intake port 203.

  As shown in FIG. 4, the rotating mechanism unit 202 is arranged such that the two propeller bodies 205 and 206 having a plurality of blades are coaxial with each other, and can rotate in either forward or reverse direction. It is configured. The rotation mechanism portion 202 is accommodated in the air blowing case 201 so as to be located between the first air inlet 203 and the first air outlet 204.

  Further, the propeller bodies 205 and 206 are configured so that the amounts of rotation (rotational speeds) of the respective propeller bodies 205 and 206 can be controlled independently and variably by the electronic control unit 102. At this time, if the propeller bodies 205 and 206 are controlled to rotate in directions different from each other, the twist generated by the rotation of the respective propeller bodies 205 and 206 is cancelled, which makes it possible to supply a stable air volume, which is preferable.

  According to the blower 200 configured as described above, when the two propeller bodies 205 and 206 are rotationally driven by the electronic control unit 102, air is sucked from the first intake port 203 provided in the blower case 201 and the first It will be sent out (blown) toward the exhaust port 204.

  The number of propeller bodies is not limited to two, and one propeller body may be used alone, or three or more propeller bodies may be used. Further, the compressed air may be sent out using an electric compressor or the like instead of the above-described rotation mechanism portion 202.

  As shown in FIG. 3 and FIG. 4, the support 220 is provided on a support case 221 whose one end is connected to the blower case 201 and whose other end is connected to the first cylindrical body 240, and the support case 221. And a movable arm unit 222 controlled by the unit 102.

  As shown in FIG. 4, the support case 221 is provided therein with an air flow passage 223 serving as a flow path of air, and the first exhaust port 204 of the air flow case 201 and the second air intake of the first cylindrical body 240. It is configured to connect with H.245. Therefore, the air sent from the first exhaust port 204 is sent to the second air inlet 245 through the air passage 223 of the support case 221.

  As shown in FIG. 5, the movable arm portion 222 includes a linear arm body 224 and a movable joint portion 225. One end side of the arm body 224 is connected to the main body portion 101 via the movable joint portion 225, and the other end side is fixed to the lift generating unit 20.

  The movable joint portion 225 includes a drive mechanism (not shown) controlled by the electronic control unit 102, rotates the arm body 224 according to the control of the electronic control unit 102, or changes the angle vertically and horizontally. Variable control is possible (see FIG. 5). Here, since the other end side of the arm body 224 is fixed to the lift generation unit 20, when the electronic control unit 102 variably controls the arm body 224, the lift generation unit 20 also changes. That is, it is possible to change the lift direction by variably controlling the arm body 224.

  The first cylindrical body 240 has a substantially cylindrical shape having a first opening 241 at one end side (right side in FIG. 4) and the other end side (left side in FIG. 4) connected to the second cylindrical body 260 There is.

  Inside the first cylindrical body 240, a first air flow passage 242 which is a flow passage of air is formed to penetrate. One end side (right side in FIG. 4) of the first air flow path 242 communicates with the first opening 241, and the other end side (left side in FIG. 4) communicates with the third air inlet 267. In addition, the inside of the first cylindrical body 240 has a hollow structure, and an annular first hollow region 243 is formed along the circumferential direction of the first cylindrical body 240.

  As shown in FIG. 4, the first hollow area 243 has a wide area at one end side (right side in FIG. 4) and a narrow cross-section teardrop such that the other end side (left side in FIG. 4) gradually narrows. It is defined to be an annular space of shape. In addition, corresponding to this, as shown in FIG. 4, the first air flow passage 242 is narrowed at one end side (right side in FIG. 4) and spreads toward the other end side (left side in FIG. 4) It has a tapered shape with a gradual diameter increase.

  At one end side (right side in FIG. 4) of the first hollow area 243, a second exhaust port 244 communicating the first hollow area 243 and the first air flow path 242 is provided. A second air inlet 245 is provided in communication with the

  The second exhaust port 244 has a first nozzle 246 which is slit in an annular shape along the extending direction of the first hollow area 243. The first nozzle 246 is shaped to discharge the air discharged from the second exhaust port 244 to the other end side along the inner peripheral wall surface of the first air flow passage 242. Therefore, the air having passed through the second intake port 245 circulates in the first hollow region 243 and is then discharged from the second exhaust port 244, and along the inner peripheral wall surface of the first air flow path 242 by the first nozzle 246. It will be discharged to the third inlet 267 on the other end side.

  The second cylindrical body 260 has a second opening 261 at one end side (upper side in FIG. 4) and a blower port 262 at the other end side (lower side in FIG. 4). It is a substantially cylindrical tubular body having a large diameter dimension.

  Inside the second cylindrical body 260, a second air flow passage 263 which is a flow passage of air is formed to penetrate. One end side (upper side in FIG. 4) of the second air flow path 263 communicates with the second opening 261, and the other end side (lower side in FIG. 4) communicates with the air outlet 262. In addition, the inside of the second cylindrical body 260 has a hollow structure, and an annular second hollow region 264 is formed along the circumferential direction of the second cylindrical body 260.

  As shown in FIG. 4, the second hollow area 264 has a wide area at one end (upper side in FIG. 4) and a gradually narrower cross-section with a width gradually decreasing toward the other end (lower side in FIG. 4). It is defined to be a drop-shaped annular space. In addition, corresponding to this, as shown in FIG. 4, the second air flow path 263 is narrowed at one end side (upper side in FIG. 4) and broadens toward the other end side (lower side in FIG. 4) It has a tapered shape with a gradual diameter increase.

  Further, an annular rib 265 is formed at an edge portion of the air outlet 262 so as to protrude in a hook shape toward the outer peripheral direction of the second cylindrical body 260.

  A third exhaust port 266 is provided on one end side (upper side in FIG. 4) of the second hollow area 264 to connect the second hollow area 264 and the second air flow path 263, and the other end side (lower side in FIG. 4). And a third air inlet 267 communicating the second hollow area 264 with the first air flow passage 242.

  The third exhaust port 266 has a second nozzle 268 which is slit in an annular shape along the extending direction of the second hollow area 264. The second nozzle 268 is shaped to eject air discharged from the third exhaust port 266 to the other end side (lower side in FIG. 4) along the inner peripheral wall surface of the second air flow path 263. . Therefore, after the air having passed through the third air inlet 267 circulates in the second hollow region 264, the air is discharged from the third air outlet 266, and along the inner peripheral wall surface of the second air flow passage 263 by the second nozzle 268. It will be sent out to the air outlet 262.

  Lifting force is generated by the air flow ejected downward from the air blowing port 262, and the firefighting drone 1 can fly.

  In the lift generation unit 20 configured as described above, the air flow rate flowing through the first air flow path 242 of the first cylindrical body 240 and the air flow rate flowing through the second air flow path 263 have the second exhaust port by the so-called Coanda effect. It is higher than the flow rate of air discharged from 244 and the flow rate of air injected from the third exhaust port 266. Hereinafter, description will be made with reference to FIG.

  First, when the propeller bodies 205 and 206 are controlled to rotate by the electronic control unit 102, air is sucked from the first air intake port 203 and is sent out from the first exhaust port 204 to the air passage 223. The air that has flowed into the air passage 223 is sucked from the second air inlet 245 and is discharged from the second air outlet 244 while flowing back through the first hollow region 243. The air discharged from the second exhaust port 244 is discharged toward the inner peripheral wall surface of the first air flow path 242 by the first nozzle 246.

  At this time, a flow of air along the inner peripheral wall surface of the first air flow passage 242 is generated by the Coanda effect, causing the air to be entrained (sucked), and one end side of the air sucked from the first opening 241 (FIG. 4). An air flow is generated from the middle right side to the other end side (left side in FIG. 4). Thus, the air flow of the air taken in from the first opening 241 is added to the air flow discharged from the first nozzle 246, so that the air flow rate flowing through the first air flow path 242 is amplified.

  The air amplified by the first cylindrical body 240 is sucked from the third inlet 267 of the second cylindrical body 260, flows back through the second hollow region 264, and is discharged from the third exhaust port 266. Here, the air discharged from the third exhaust port is discharged toward the inner peripheral wall surface of the second air flow path 263 by the second nozzle 268.

  At this time, similarly to the first air flow path 242, a flow of air along the inner peripheral wall surface of the second air flow path 263 is generated by the Coanda effect, causing air entrapment (suction), and suction from the second opening 261 An air flow from one end side (upper side in FIG. 4) of the air to the other end side (lower side in FIG. 4) is generated. Thereby, the air flow of the air flowing from the second opening 261 is added to the air flow discharged from the second nozzle 268 by the air flow, so the air flow rate flowing through the second air flow path 263 is amplified and the air is blown. It is discharged from the mouth 262.

  Here, since the air flow discharged from the second nozzle 268 is the air flow amplified by the first air flow path 242, more entrapment may occur. In addition, the first intake port 203 is provided in the vicinity of the air outlet 262, that is, on the downstream side of the second air flow path 263, so that air can be drawn from the first intake port 203 as the first intake air is drawn. Negative pressure can be generated around the mouth 203. Since the wind flows in the direction of lower pressure, it is possible to further accelerate the air flow flowing out from the vicinity of the first air intake 203, that is, the air flow from the air flow opening 262. It is possible to

  Further, the annular rib 265 provided at the edge of the air outlet 262 also amplifies the air flow rate flowing through the second air flow passage 263 by generating a negative pressure in the vicinity of the air outlet 262 by a so-called wind lens effect. It is possible.

The carrier unit 30 has a frame 300, a damping device 340 attached to the frame 300, a water discharge nozzle 360 and a hose portion 380.
The frame 300 comprises a front frame 301 and a back frame 302 as shown in FIGS. 7 and 8.

  The front frame 301, as shown in FIG. 8A, connects a pair of front legs 303, 303 extending downward from the bottom of the main unit 10, and the pair of front legs 303, 303. It includes a front plate portion 304 and nozzle support portions 305 extended from the front leg portions 303 and 303 and the front plate portion 304, respectively.

  The proximal end sides of the pair of front legs 303, 303 have shaft portions 306, 306 extending in the left-right direction (left-right direction in FIG. 7), and a front plate attachment portion 307 is provided on the free end side. The pair of front legs 303, 303 are pivotally supported by a pair of proximal bearing portions 308 arranged in parallel on the bottom surface of the main unit 10 via the shaft portions 306, 306, and in the front-rear direction (vertical direction in FIG. 7) It is configured to be freely tiltable.

  As shown in FIG. 8B, the front plate portion 304 is a substantially horizontal plate-like body, and front plate attachment portions 307 of a pair of front leg portions 303, 303 are provided at the left and right end portions in the longitudinal direction. It is attached. Therefore, in synchronization with the tilting of one or the other front leg of the pair of front legs 303, 303, the other one of the front legs is also tilted back and forth.

  Further, in the vicinity of the center in the longitudinal direction of the front plate portion 304, a mounting opening 309 penetrating in the front and rear direction is provided. Further, a damper mounting portion 311 having a screw hole 310 opened in a direction parallel to the shaft portions 306, 306 provided on the base end side is provided on the rear surface (lower side in FIG. 7) of the front plate portion 304 Grounding foot portions 312 and 312 are provided on the bottom surfaces of left and right end portions of the front plate portion 304.

  The nozzle support portion 305 is provided with a cylindrical nozzle holder 313 that opens in a circular shape at the front and back, and a support leg 314 that supports the nozzle holder 313. One end side of each of the support legs 314 is fixed to the vicinity of the base end side of each of the pair of front legs 303, 303 and the left and right ends of the front plate portion 304, and the other end is more than the pair of front legs 303, 303 It is fixed to the outer peripheral surface of the nozzle holder 313 located in the front.

  The rear frame 302, as shown in FIG. 8A, includes a pair of rear legs 315, 315 extending vertically downward from the bottom surface of the main unit 10, and the pair of rear legs 315, 315. And a rear plate portion 316 that connects the two.

  The pair of rear legs 315, 315 has shaft portions 317, 317 extending in the left-right direction (left and right direction in FIG. 7) on the base end side, and also on the free end side. Shaft portions 317 and 317 parallel to the axis of the lens are provided. The pair of rear legs 315, 315 is pivotally supported by a pair of proximal bearing portions 318 arranged in parallel on the bottom surface of the main unit 10 via the shaft portions 317, 317 provided on the proximal end side. Similar to the front legs 303, 303, it is configured to be tiltable in the front-rear direction (vertical direction in FIG. 7). Further, the pair of rear legs 315, 315 has a telescopic structure, and the length can be expanded and contracted by a drive mechanism (not shown) controlled by the electronic control unit 102. When expanding and contracting the pair of rear legs 315 and 315, expansion and contraction are controlled so that the lengths of the respective rear legs 315 and 315 become equal.

  As shown in FIG. 8B, the rear plate portion 316 is a substantially horizontal plate-like body, and free end side bearing portions 319 are provided on the top surfaces of the left and right end portions in the longitudinal direction, Shafts 317, 317 provided on the free end side of the pair of rear legs 315, 315 are rotatably supported. Further, as for the pair of rear legs 315, 315, as in the case of the pair of front legs 303, 303, each of the pair of rear legs 315, 315 is synchronously tilted forward and backward.

  Further, in the vicinity of the center in the longitudinal direction of the rear plate portion 316, a mounting opening 320 penetrating in the front and rear direction is provided. In addition, a screw hole 321 opened in a direction parallel to the shaft portions 317 and 317 provided on the free end side on the front surface of the rear plate portion 316 (the surface facing the front plate portion 304; upward direction in FIG. 7). A damper attachment portion 322 having a bottom portion is provided, and on the bottom surfaces of left and right end portions of the rear plate portion 316, foot portions 323 for grounding are provided.

  The damping device 340 has a damper 341 and a coil spring 342. The damper 341 includes a single cylinder type cylinder 343 filled with oil and gas inside, and a piston rod 344 slidably inserted in the cylinder 343. The coil spring 342 is wound so as to cover the outer periphery of the damper 341. One end of the coil spring 342 is joined to a spring receiver 345 provided to the cylinder 343, and the other end of the coil spring 342 is joined to a spring receiver 345 provided to the piston rod 344. Further, at the tip of each spring receiving portion 345, an unshown opening 346 corresponding to the screw holes 310, 321 of the damper mounting portions 311, 322 provided in the front plate portion 304 and the rear plate portion 316 is provided. There is. The damping device 340 is pivotably attached by a bolt or the like through the screw holes 310 and 321 and the opening 346 (not shown) so that the damping device 340 can tilt between the front plate portion 304 and the rear plate portion 316. It is attached.

Note that the state of the damping device 340 shown in FIG. 8A is the no load state where it extends most in the axial direction, and the stroke length of the piston rod 344 is the longest. Under normal conditions, the maximum stroke length under no load (X line in FIG. 8A) is maintained.
Further, instead of the single cylinder type damper 341, a double cylinder type damper may be used as the damping measure 340, or an elastic body such as rubber may be used.

  The water discharge nozzle 360 has a cylindrical nozzle body 361 having a flow passage 364 penetrating therethrough, and a nozzle side joint 362.

The nozzle main body 361 is formed to be tapered toward the discharge port 363 as shown in FIG. 8, and a flow channel 364 (not shown) formed therein is also narrowed toward the discharge port 363. Configured Further, the nozzle main body 361 is provided with a water discharge state switching mechanism 365 (not shown) controlled by the electronic control unit 102, and at least a rod-like water discharge state to discharge water linearly, a wide-angle water discharge state to discharge radially, and a spray It is configured to be able to switch to each of the three water discharge states in the spray water discharge state and the water discharge stop state in which the water discharge is not performed.
The nozzle side joint 362, as shown in FIG. 8, functions as a male side joint having a threaded groove on the outer peripheral surface, and is configured to be able to be screwed and connected with a female side joint 384 provided on the hose portion 380 There is.

  The hose portion 380 has an intermediate hose 381 and a water supply hose 382. The intermediate hose 381 and the water supply hose 382 were formed by lining the inner surface of a woven fabric obtained by cylindrically weaving yarns of cotton, synthetic fibers, etc. with a circular weave machine, plain weave machine, etc. with rubber, synthetic resin, etc. It has the same structure as a fire protection jacket hose, and has a strength that can withstand the pressure of pressurized water sent from a water pump and various fire hydrants. The hose used for the hose portion 380 may be a hose other than the fire protection jacket hose, for example, a fire holding shape hose or a wet hose. In addition, hoses other than those for fire fighting, for example, hoses for civil engineering, industrial, and horticulture may be used.

  Both ends of the intermediate hose 381 are fixed to the attachment openings 309 and 320 of the front plate portion 304 and the rear plate portion 316 respectively, and function as an attachment 383. Further, female side joints 384 are provided as joint joints at both ends of the intermediate hose 381 (see FIG. 9). The female side joint 384 functions as the female side of the screw type connection fitting, and after inserting the nozzle side joint 362 and the water hose side joint 385 to be the male side joint, the male side and female side are obtained by rotating in a predetermined direction. Each joint is configured to be firmly screwed and connected (see FIG. 8A).

  The length of the intermediate hose 381 is configured to be slightly longer than the length X of the front plate portion 304 and the rear plate portion 316 in the normal state. That is, as shown in FIGS. 8 and 9, the intermediate hose 381 is attached in a slightly bent state. By providing such a deflection, the shock of expansion or contraction due to rapid pressurization or depressurization that occurs at the start or stop of water discharge can be mitigated, and stability improvement at flight can be expected, which is preferable. It becomes.

  At one end side of the water supply hose 382, a water supply hose side joint 385 which is a joint for connection on the male side is provided. The water supply hose side joint 385 functions as a male side joint having a thread groove on the outer peripheral surface, and is configured to be screwed and connected with a female side joint 384 provided on the intermediate hose 381 (FIG. a) see). The other end of the water supply hose 382 is provided with a predetermined joint (not shown) that can be connected to a water supply pump car, various fire hydrants and the like.

  Note that the water discharge nozzle 360 and the connection fitting of each hose are not limited to a screw connection fitting, and a plug-in (Machino type) connection fitting having excellent convenience such as removal may be used. Moreover, the male side joint and the female side joint attached to each hose may be mutually replaced and provided. In addition, it is desirable that the respective joint joints be arranged in a common type, for example, a general-purpose type predetermined in a predetermined accreditation organization or group. It is because combination between hoses becomes easy and becomes suitable if it is the same type.

  As described above, the carrier unit 30 in the present embodiment is provided with the damping device 340, and the damping device 340 connects the front plate portion 304 and the rear plate portion 316, and the attachment angle can be varied. It is attached so that it can tilt freely. Therefore, in the normal state, as shown in FIG. 9A, the horizontal direction is maintained, but when the pair of rear legs 315, 315 is driven to be shortened, as shown in FIG. 9B. In this state, it is inclined downward toward the front side (left side in FIG. 9) while maintaining the maximum stroke length.

  Further, with the downward inclination operation of the damping device 340, the connected front plate portion 304 is pulled rearward (right side in FIG. 9), and the rear portion centering on the shaft portions 306, 306 of the pair of front legs 303, 303. Tilt toward (right side in FIG. 9). Then, with the tilting of the front plate portion 304, the water discharge nozzle 360 attached to the front plate portion 304 also tilts downward (downward in FIG. 9), and the discharge port 363 changes downward. Thereby, it becomes possible to adjust the water discharge direction while maintaining the hovering state of the fire service drone 1. When the discharge port 363 is directed upward, the pair of rear legs 315, 315 may be extended and driven from the state of maintaining the substantially horizontal direction shown in FIG. 9A, contrary to the above. In addition, since the direction of the outlet 363 can be changed while maintaining the maximum stroke length of the damping device 340, it is possible to maximize the damping force of the damping device 340 in any direction.

  An application example of the firefighting drone 1 equipped with the lift generation unit 20 and the carrier unit 30 according to the present embodiment will be described with reference to FIG.

  In FIG. 10, it is assumed that the house 40 has a fire. In such a situation, first, the water discharge nozzle 360 and the water supply hose 382 are attached to the intermediate hose 381 of the fire drone 1. Next, the water feed pump car 60 and the water feed hose 382 are connected, and the water feed hose 382 and the intermediate hose 381 are filled with water. In addition, it is preferable to fill the water before the flight, because it has less influence on the flight operation of the fire drone 1 than to fill the water during the flight.

  Then, the fire drone 1 is taken off to fly to a position higher than the target house 40. When flying to a desired position, the hovering state is made on the spot, switching from the water stopping state to the water discharging state, and discharging the pressurized water sent from the water pump vehicle 60 toward the object. At this time, it is considered that the water discharge reaction force acts on the fire drone 1 via the front plate portion 304 as a reaction caused by the water discharge start, but this reaction is absorbed or attenuated by the damping device 340. Thus, the damping device 340 reduces the influence on the fire service drone 1 and reduces the influence on flight due to the start and stop of the water discharge, the switching of the water discharge type, and the like.

  In addition, when the flight position can not be adjusted by changing the altitude of the fire drone 1, such as when the flight altitude is restricted due to an obstacle or the like not shown, the pair of rear legs 315, 315 The water discharge direction may be adjusted by controlling expansion and contraction. In addition, if it is desired to discharge water intensively, rod-like water discharge, if wide water discharge is desired, such as wide-angle water discharge may be performed while switching the water discharge mode as appropriate depending on the situation.

  Moreover, it is also possible to make the fire drone 1 for fire into the house 40 from the window 401, and to perform fire fighting from the inside. In such a case, a camera or the like (not shown) may be mounted on the firefighting drone 1, and an image may be transmitted in real time to a display device or the like provided outside via the transmission / reception unit 103. Moreover, a microphone, a speaker, etc. which are not shown in figure may be mounted in the fire drone 1, and audio | voice communication may be enabled between a predetermined | prescribed operator and a disaster victim. Further, in this case, it is desirable to control the fire drone 1 in accordance with the operation of a predetermined operator. With such a configuration, it is possible to conduct a fire extinguishing activity via a display device or the like, and a fire extinguishing activity can be safely and properly performed without a firefighter or the like rushing into the inside.

  As described above, the lift generation unit 20 in the present embodiment supplies the air generated from the air blower 200 to the second cylindrical body 260 as an amplified air flow by the Coanda effect of the first cylindrical body 240. Then, in the second cylindrical body 260, the amplified air flow is caused to flow down the second air flow path 263 as an air flow further amplified by the Coanda effect by the second cylindrical body 260 and to be ejected from the air blowing port 262. , Generate lift. In addition, the first air inlet 203 for supplying air to the air blower 200 is provided in the second air flow passage 263 to generate a negative pressure around the air outlet 262, and air is blown from the second air flow passage 263. The momentum of the air flow flowing toward the port 262 is further amplified.

  According to the lift generation unit 20 configured as described above, in the lift generation device using the Coanda effect, it is possible to generate high efficiency lift which further increases the efficiency of the Coanda effect. In addition, by combining a plurality of cylindrical bodies (the first cylindrical body 240 and the second cylindrical body 260) generating the Coanda effect, high output lift can be generated without using a blower such as a high output motor or the like. . As a result, it is possible to realize a lightweight lift device that is excellent in power consumption efficiency. Further, since a high output motor or the like is not used, it is expected that the flightable time will be further increased. In addition, since the rotation mechanism portion 202 is not exposed, a wind noise can not be generated and a lift generating device with high quietness can be obtained. In addition, even in a flight environment resistant to obstacles and having many branches and leaves such as forests. It is also possible to generate stable lift without restriction.

  As mentioned above, although embodiment which applied this invention was described, it can not be overemphasized that an appropriate change is possible in the range which does not deviate from the meaning of this invention.

For example, although the example which provides the 1st air inlet 242 in the 2nd ventilation flow path 263 is given in the said embodiment, the position which provides the 1st air inlet 242 is not restricted to this. For example, as shown in FIG. 11, the first air inlet 242 may be provided on the bottom side of the blower case 201. Even with this configuration, negative pressure is generated on the bottom side of the blower case 201, and the air flowing out from the blower port 262 is involved, and as a result, the air flow flowing out from the blower port 262 can be further accelerated. That is, any position can be used as long as negative pressure can be generated downstream of the air outlet 262.
Further, in addition to the first air inlet 242 provided at the position as described above, another air inlet may be provided on the side surface of the blower case 201 opposite to the second cylindrical body 260. In such a configuration, the negative pressure is generated on the downstream side of the air outlet 262 by the intake of air from the first air inlet 242, and the second air flow passage 263 is generated by the intake of air from another air inlet. The amount of air taken into can be increased.

  Moreover, in the said embodiment, the example which extinguishes with fire drone 1 only was mentioned. However, if it is desired to secure a larger amount of water discharge at the actual site, or if it is desired to use a longer hose, it may be assumed that the firefighting drone 1 alone is insufficient. In such a case, as shown in FIG. 12, the fire extinguishing activity may be carried out by cooperation of a plurality of drones using another relay drone 2 other than the fire drone 1.

  The relay drone 2 has the same configuration as the fire drone 1 of the present invention except that the water discharge nozzle 360 and the nozzle support portion 305 are not mainly provided. The relay drone 2 and the fire drone 1 are connected by a relay hose 386. The relay hose is of the same type as the connection fitting used for the firefighting drone 1 of the present embodiment, and can be connected to each other. The number of relay drones 2 is not limited to one, and may be two or more.

  Moreover, although the example which has the rotation mechanism part 202 in each of the lift generation | occurrence | production unit 20 was mentioned in the said embodiment, it does not restrict to this. For example, the rotation mechanism unit 202 may be provided in the main body unit, and a mechanism for blowing air to each of the lift generation units 20 may be used.

  Further, as shown in FIG. 13, instead of the lift generation unit 20 in the present embodiment, the lift may be generated by the rotational flow of the plurality of rotary wings 80.

DESCRIPTION OF SYMBOLS 1 Fire drone 10 Body unit 20 Lift generation unit 30 Carrier unit 200 Air blower 220 Support body 240 1st cylindrical body 260 2nd cylindrical body 301 Front frame 302 Rear frame 303 Front leg portion 304 Front plate portion 315 Rear leg portion 316 Rear plate Part 340 Damping device 341 Damper 342 Coil spring 343 Cylinder 344 Piston rod 345 Spring receiving part 360 Water discharge nozzle 381 Intermediate hose 382 Water supply hose

Claims (2)

The Coanda effect, the capable of generating lift in the opposite direction to the predetermined direction of the upstream-side air flow more air flow toward a predetermined direction from the opening to the downstream opening is generated toward the predetermined direction A lift generating device having a single cylindrical body,
The lift generating device has a blower mechanism that generates an air flow flowing in the predetermined direction,
The air blowing mechanism blows the air sucked from the air suction portion toward the air discharging portion,
Said exhaust portion is provided on the inner peripheral surface of the first cylindrical body in the vicinity of the upstream opening, the air blown from the blower mechanism, of the first cylindrical body as an air stream flowing in the predetermined direction The Coanda effect can be generated by blowing air along the circumferential surface,
The lift generating device according to claim 1 , wherein the air suction portion is provided on an inner peripheral surface of the first cylindrical body in the vicinity of the downstream side opening, and configured to be able to suction a part of the air flow . It has a second cylindrical body between the blowing mechanism and the exhaust port,
It said second cylindrical body, by Coanda effect, lift generating apparatus according to claim 1, wherein Rukoto is generated toward the air flow or the air flow which is blown from the blower mechanism to the exhaust unit.

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