JP2020108996A - Amplified fluid flow generating mechanism - Google Patents

Abstract

To provide an amplified fluid flow generating mechanism that can generate large fluid flow without using a high-output motor or a large-size motor that consumes great electric power.SOLUTION: An amplified fluid flow generating mechanism is provided with: a rotary vane mechanism that generates fluid flow; a first cylindrical body connected to the rotary vane mechanism, which has a first Coanda mechanism that guides the fluid flow to be flown along an inner peripheral surface of the body from one end part at an upstream side toward the other end at a downstream side and amplifies the fluid flow by spooling up the fluid through a first opening part provided at the one end part at the upstream side; and a second cylindrical body connected to the other end part of the first cylindrical body, which has a second Coanda mechanism that guides the fluid flow amplified by the first Coanda mechanism of the first cylindrical body to be flown along the inner peripheral surface from the one end part at the upstream side toward the other end part at the downstream side and amplifies further the amplified fluid flow by spooling up the fluid through a second opening part provided at the one end part at the upstream side.SELECTED DRAWING: Figure 4

Description

The present invention relates to an amplified fluid flow generation mechanism that is provided in an aircraft or the like and that amplifies a flow of an airflow or the like.

Conventionally, a fire extinguisher container is mounted on the body part of a helicopter for fire fighting or on the outside thereof, and a fire extinguisher that is configured to be able to inject a fire extinguishing agent to the front of the helicopter for fire fighting from a cylinder tip connected to this fire extinguisher container A helicopter is known (for example, refer to Patent Document 1).

JP-A-5-139387

However, in such a fire helicopter, it is effective when there is an air space in which the fire helicopter can fly, but it is difficult for the fire helicopter to fly because the buildings are dense. However, there is a problem that it is difficult to effectively cope with fires in a forest fire covered with trees or a fire in a building. In addition, most of the fire fighting activities in such a case will have to rely on human resources such as firefighters, but until the scene arrives when the fire scene is complicated or there is an obstacle in the middle. There was also a problem that it took a lot of time and lacked speediness. In addition, fire extinguishing activities inside the building still pose a high risk to the lives of firefighters and others, and improvement of safety has been desired.

By the way, the present invention can be used for an aircraft such as a drone that replaces a helicopter, and an amplified fluid flow that can obtain a large fluid flow without using a high-power motor or a large-sized motor with large power consumption. The purpose is to provide a generating mechanism.

In order to achieve the above object, an amplification fluid flow generation mechanism according to the present invention is a rotary vane mechanism for generating a fluid flow in a predetermined direction, and a cylindrical body connected to the rotary vane mechanism. A first opening provided at one end of the upstream side for guiding the fluid flow generated by the blade mechanism so as to flow from one end on the upstream side to the other end on the downstream side along the inner peripheral surface. A first cylindrical body having a first Coanda mechanism for amplifying the fluid flow by entraining the fluid from
A cylindrical body connected to the other end of the first cylindrical body, the fluid flow being amplified by the first Coanda mechanism of the first cylindrical body from one upstream end along an inner peripheral surface. A second Coanda mechanism for guiding the flow toward the other end on the downstream side, and further amplifying the amplified fluid flow by entraining the fluid from the second opening provided at the one end on the upstream side. And a second cylindrical body having the same.

According to the present invention, a large fluid flow can be obtained without using a high-output motor with large power consumption or a large-sized motor.

It is a perspective view of the drone for fire fighting in this embodiment. It is a top view of the drone for fire fighting in this embodiment. It is a side view and a perspective view showing a lift generation unit. FIG. 3 is a sectional view taken along line AA of FIG. 2. It is a schematic diagram which shows operation|movement of the support body of a lift generation unit. It is a schematic diagram showing a flow of air in a lift generation unit. It is a bottom view of the drone for fire fighting in this embodiment. It is a side view which shows a carrier 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 a schematic diagram showing another example of a lift generation unit. It is a figure which shows the application example of the drone for fire fighting 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, other specific numerical values, and the like in such embodiments are merely examples for facilitating the understanding of the invention, and do not limit the invention unless otherwise specified.

FIG. 1 shows an embodiment in which the present invention is applied to a flight vehicle for fire fighting, that is, a so-called drone for fire fighting.

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

As shown in FIG. 2, 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 this embodiment). A carrier unit 30 is provided below the body unit 10. Various nozzles and hoses can be connected to the carrier unit 30, and the carrier unit 30 is detachably fixed to the bottom surface portion of the main unit by a mounting portion 31 (not shown).

The main body unit 10 is capable of transmitting and receiving a predetermined operation signal and radio waves, and an electronic control unit 102 including at least a CPU as a central processing unit and various storage devices such as RAM/ROM inside a substantially disc-shaped main body 101. The transmitter/receiver 103, the 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 received from the transmission/reception unit.

As shown in FIGS. 3 and 4, the lift generation unit 20 includes a blower device 200, a support 220, a first cylindrical body 240, and a second cylindrical body 260.

As shown in FIG. 4, the blower device 200 includes a blower case 201 and a rotation mechanism unit 202 housed in the blower case 201 and controlled to be rotatable 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 substantially cylindrical tubular body as shown in FIG. Further, 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 blower case 201 is provided with a first exhaust port 204 for sending out the air sucked from the first intake port 203.

As shown in FIG. 4, the rotation mechanism section 202 is arranged so that two propeller bodies 205 and 206 having a plurality of blades have their rotation axes coaxial with each other, and can rotate in either forward or reverse directions. It is configured. The rotating mechanism 202 is housed in the blower case 201 in a state of being located between the first intake port 203 and the first exhaust port 204.

Further, the propeller bodies 205 and 206 are configured such that the electronic control unit 102 can independently and variably control the amount of rotation (rotation speed) of each propeller body 205 and 206. 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 propeller bodies 205 and 206 is canceled, so that a stable air volume can be supplied, which is preferable.

According to the blower device 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 and goes toward the first exhaust port 204. Will be sent out (blow).

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

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

As shown in FIG. 4, the support case 221 is provided with a ventilation passage 223 serving as an air flow passage therein, and the first exhaust port 204 of the ventilation case 201 and the second intake port of the first cylindrical body 240. 245 is connected. Therefore, the air sent out from the first exhaust port 204 is sent out to the second intake port 245 through the air blowing 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 section 101 via the movable joint section 225, and the other end side is fixed to the lift generating unit 20.

The movable joint unit 225 includes a drive mechanism (not shown) controlled by the electronic control unit 102, and rotates the arm body 224 according to the control of the electronic control unit 102, and 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 arm body 224 is variably controlled by the electronic control unit 102, the lift generation unit 20 is also varied. That is, the lift direction can be changed by variably controlling the arm body 224.

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

Inside the first cylindrical body 240, a first air flow passage 242, which serves as an air flow passage, is formed so as to penetrate therethrough. One end side (right side in FIG. 4) of the first air flow passage 242 is configured to communicate with the first opening 241, and the other end side (left side in FIG. 4) is configured to communicate with the third intake port 267. 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 region 243 has a wide area on one end side (right side in FIG. 4) and gradually narrows toward the other end side (left side in FIG. 4). It is defined so as to form a ring-shaped space. Correspondingly, as shown in FIG. 4, the first air flow passage 242 is narrow at one end side (right side in FIG. 4) and widens toward the other end side (left side in FIG. 4). It has a tapered shape with a gradually expanded diameter.

A second exhaust port 244 that connects the first hollow region 243 and the first air flow passage 242 is provided at one end side (right side in FIG. 4) of the first hollow region 243, and the air passage 223 is provided at the other end side. A second intake port 245 that communicates with the above is provided.

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

The second cylindrical body 260 includes a second opening 261 on one end side (upper side in FIG. 4) and a blower opening 262 on the other end side (lower side in FIG. 4 ), and is more than the first cylindrical body 240. It is a substantially cylindrical tubular body having a large diameter dimension.

A second air flow passage 263, which is a flow passage for air, is formed inside the second cylindrical body 260 so as to penetrate therethrough. One end side (upper side in FIG. 4) of the second air flow passage 263 communicates with the second opening 261 and the other end side (lower side in FIG. 4) communicates with the air outlet 262. Further, 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 region 264 has a wide tear area on one end side (upper side in FIG. 4) and a narrower tear cross section that gradually narrows toward the other end side (lower side in FIG. 4). It is defined as a drop-shaped annular space. Corresponding to this, as shown in FIG. 4, the second air flow passage 263 is narrow at one end side (upper side in FIG. 4) and widens toward the other end side (lower side in FIG. 4). It has a tapered shape that gradually expands in diameter.

Further, an annular rib 265 is formed at the edge of the air outlet 262 so as to project in a flange 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 region 264 to connect the second hollow region 264 and the second air flow passage 263, and the other end side (lower side in FIG. 4). On the side), a third intake port 267 that connects the second hollow region 264 and the first air flow passage 242 is provided.

The third exhaust port 266 has a second nozzle 268 that is slit-formed in an annular shape along the extending direction of the second hollow region 264. The second nozzle 268 is shaped so as to eject the air discharged from the third exhaust port 266 to the other end side (the lower side in FIG. 4) along the inner peripheral wall surface of the second air flow passage 263. .. Therefore, the air that has passed through the third intake port 267 recirculates in the second hollow region 264, is then discharged from the third exhaust port 266, and is discharged by the second nozzle 268 along the inner peripheral wall surface of the second blow passage 263. It will be sent out to the blower opening 262.

Lifting force is generated by the airflow ejected downward from the blower port 262, and the fire drone 1 can fly.

In the lift generating unit 20 configured in this way, the air flow rate of the first air flow passage 242 of the first cylindrical body 240 and the air flow rate of the second air flow passage 263 of the first cylindrical body 240 are the second exhaust port due to the so-called Coanda effect. It is larger than the flow rate of air discharged from 244 and the flow rate of air ejected from the third exhaust port 266. This will be described below with reference to FIG.

First, when the rotation of the propeller bodies 205 and 206 is controlled by the electronic control unit 102, air is sucked from the first intake port 203 and is blown out from the first exhaust port 204 to the blow passage 223. The air that has flowed into the ventilation passage 223 is sucked from the second intake port 245, recirculates through the first hollow region 243, and is discharged from the second exhaust port 244. The air discharged from the second exhaust port 244 is discharged toward the inner peripheral wall surface of the first air flow passage 242 by the first nozzle 246.

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

The air amplified by the first cylindrical body 240 is sucked through the third intake port 267 of the second cylindrical body 260, recirculates through the second hollow region 264, and is discharged through 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 passage 263 by the second nozzle 268.

At this time, similarly to the first air flow passage 242, a flow of air is generated along the inner peripheral wall surface of the second air flow passage 263 due to the Coanda effect, and air entrapment (suction) occurs and suction is performed from the second opening 261. An air flow from the one end side (upper side in FIG. 4) of the generated air toward the other end side (lower side in FIG. 4) is generated. As a result, the air flow of the air trapped from the second opening 261 is added to the air flow discharged from the second nozzle 268, so that the flow rate of the air flowing through the second air flow passage 263 is amplified and 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 passage 242, more entrainment may occur. Further, since the first intake port 203 is provided in the vicinity of the blower port 262, that is, on the downstream side of the second blower flow path 263, the more air is sucked from the first intake port 203, the first intake air It is possible to generate a negative pressure around the mouth 203. Since the wind flows in the direction of low pressure, it is possible to further accelerate the air flow flowing around the first intake port 203, that is, the air blowing port 262, which also amplifies the flow rate of the air flowing through the second air blowing passage 263. It is possible to let.

Further, the annular rib 265 provided at the edge of the blower opening 262 also generates a negative pressure in the vicinity of the blower opening 262 by a so-called wind lens effect, thereby further amplifying the air flow rate flowing through the second blower flow path 263. It is possible.

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

As shown in FIGS. 8A and 8B, the front frame 301 includes a pair of front leg portions 303, 303 extending from the bottom surface of the main body unit 10 toward a vertically lower side, and the pair of front leg portions 303, A front plate portion 304 connecting the 303 to each other, and a front leg portion 303, 303 and a nozzle support portion 305 extending from the front plate portion 304 are included.

Shafts 306 and 306 extending in the left-right direction (left-right direction in FIG. 7) are provided on the base end sides of the pair of front leg parts 303, 303, and a front plate mounting portion 307 is provided on the free end side. The pair of front leg portions 303, 303 is axially supported by the pair of base end side bearing portions 308 arranged in parallel on the bottom surface of the main body unit 10 via the shaft portions 306, 306, and the front-rear direction (vertical direction in FIG. 7). It is configured to tilt freely.

As shown in FIG. 8B, the front plate portion 304 is a substantially oblong plate-shaped body, and the front plate attachment portions 307 of the pair of front leg portions 303, 303 are provided on the left and right ends in the longitudinal direction. It is attached. Therefore, the one or the other front leg portion of the pair of front leg portions 303, 303 is also configured to tilt the other or one of the front leg portions back and forth in synchronization with the front and rear tilt portions.

Further, a mounting opening 309 penetrating in the front-rear direction is provided near the center of the front plate portion 304 in the longitudinal direction. Further, on the rear surface (downward side in FIG. 7) of the front plate portion 304, 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, Grounding feet 312 and 312 are provided on the bottom surfaces of the left and right ends of the front plate 304.

The nozzle support portion 305 includes a cylindrical nozzle holder 313 having a circular opening in the front and rear, 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 each proximal end side of the pair of front leg portions 303, 303 and the left and right ends of the front plate portion 304, and the other end side of the support leg 314 is fixed to the pair of front leg portions 303, 303. It is fixed to the outer peripheral surface of the nozzle holder 313 located in the front.

As shown in FIG. 8A, the rear frame 302 includes a pair of rear leg portions 315 and 315 extending from the bottom surface of the main body unit 10 toward a vertically lower side, and a pair of the rear leg portions 315 and 315. And a rear plate portion 316 that connects the two.

The pair of rear leg portions 315, 315 has shaft portions 317, 317 extending in the left-right direction (left-right direction in FIG. 7) on the base end side, and the base end side shaft portions 317, 317 also on the free end side. Shafts 317 and 317 parallel to the axis of the are provided. The pair of rear leg portions 315, 315 are axially supported by a pair of base end side bearing portions 318 arranged in parallel on the bottom surface of the main body unit 10 via shaft portions 317, 317 provided on the base end side. Similar to the front legs 303, 303, it is configured to be tiltable in the front-back direction (vertical direction in FIG. 7). The pair of rear legs 315, 315 has a structure that can be expanded and contracted, and the length thereof can be expanded and contracted by a drive mechanism (not shown) controlled by the electronic control unit 102. When the pair of rear leg portions 315, 315 are expanded and contracted, the extension and contraction are controlled so that the rear leg portions 315, 315 have the same length.

As shown in FIG. 8B, the rear plate portion 316 is a substantially horizontally long plate-shaped body, and the free end side bearing portion 319 is provided on the top surface side of the left and right end portions in the longitudinal direction thereof. Shaft portions 317 and 317 provided on the free end sides of the pair of rear leg portions 315 and 315 are rotatably supported. The pair of rear leg portions 315, 315 are also configured so that, similarly to the pair of front leg portions 303, 303, each of the pair of rear leg portions 315, 315 tilts back and forth in synchronization.

Further, a mounting opening 320 penetrating in the front-rear direction is provided near the longitudinal center of the rear plate portion 316. Further, on the front surface of the rear plate portion 316 (the surface facing the front plate portion 304; the upper side in FIG. 7), a screw hole 321 opened in a direction parallel to the shaft portions 317, 317 provided on the free end side. And a foot 323 for grounding are provided on the bottom surface of the left and right ends of the rear plate 316.

The damping device 340 includes a damper 341 and a coil spring 342. The damper 341 includes a single-cylinder cylinder 343 filled with oil and gas, and a piston rod 344 slidably inserted in the cylinder 343. The coil spring 342 is wound so as to cover the outer circumference of the damper 341. One end of the coil spring 342 is joined to a spring receiving portion 345 provided on the cylinder 343, and the other end of the coil spring 342 is joined to a spring receiving portion 345 provided on the piston rod 344. In addition, an opening 346 (not shown) corresponding to the screw holes 310 and 321 of the damper mounting portions 311 and 322 provided on the front plate portion 304 and the rear plate portion 316 is provided at the tip of each spring receiving portion 345. There is. The damping device 340 is tiltably mounted between the front plate part 304 and the rear plate part 316 by being rotatably attached with a bolt or the like through the screw holes 310 and 321 and the opening part 346 (not shown). It is installed.

It should be noted that the state of the damping device 340 shown in FIG. 8A is the most unloaded state in which it is extended in the axial direction, and the stroke length of the piston rod 344 is the longest. In the normal state, the maximum stroke length in this unloaded state (X-ray portion in FIG. 8A) is maintained.
Further, as the damping means 340, a double cylinder type damper may be used instead of the single cylinder type damper 341, or an elastic body such as rubber may be used.

The water discharge nozzle 360 has a cylindrical nozzle body 361 having a flowing water passage 364 formed therein and a nozzle side joint 362.

As shown in FIG. 8, the nozzle body 361 is formed to have a tapered shape toward the discharge port 363, and the running water channel 364 (not shown) formed inside is also narrowed toward the discharge port 363. Is composed of. Further, the nozzle 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 linear water discharge state, a radial water discharge state wide-angle water discharge state, and a spray state. It is configured so that it can be switched to each of three spraying water discharge states in which water is sprayed and three water spray stop states in which water is not sprayed.
As shown in FIG. 8, the nozzle side joint 362 functions as a male side joint whose outer peripheral surface is threaded, and is screwed with a female side joint 384 provided in the hose portion 380 to be connectable. There is.

The hose portion 380 includes an intermediate hose 381 and a water supply hose 382. For the intermediate hose 381 and the water supply hose 382, the inner surface of a woven fabric made of cotton, synthetic fiber or the like in a tubular weaving machine or a plain weaving machine is lined with rubber or synthetic resin to form a flow path. It has the same structure as a jacket hose for fire fighting, and is strong enough to withstand the pressure of pressurized water sent from water pump cars and various fire hydrants. The hose used in the hose portion 380 may be a hose other than a jacket hose for fire fighting, for example, a shape retaining hose or a wet hose for fire fighting. Further, hoses other than those for fire fighting may be used, for example, hoses for civil engineering, industry, and gardening.

Both ends of the intermediate hose 381 are fixed to the mounting 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 joints 384 are provided as 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 coupling fitting, and after inserting the nozzle side joint 362 and the water supply hose side joint 385 which are male side joints, by rotating in a predetermined direction, the male side/female side 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, the intermediate hose 381 is attached in a slightly bent state as shown in FIGS. 8 and 9. By providing such deflection, it is possible to alleviate the shock of expansion and contraction caused by sudden pressurization and decompression at the start of water discharge or stop of water discharge, and it is expected that stability during flight can be expected to improve. Becomes

At one end of the water supply hose 382, a water supply hose side joint 385 serving as a male joint 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 to a female side joint 384 provided on the intermediate hose 381 (see FIG. 8 ( See a)). The other end of the water supply hose 382 is provided with a predetermined coupling joint (not shown) that can be connected to a water supply pump car and various fire hydrants.

It should be noted that the water discharge nozzle 360 and the connecting fittings of the respective hoses are not limited to screw-type connecting fittings, and plug-in (Machino-type) connecting fittings that are convenient for removal and the like may be used. Further, the male side joint and the female side joint attached to each hose may be replaced with each other. Further, it is desirable that the respective joints for connection are prepared in a common type, for example, a general-purpose type predetermined by a predetermined accreditation body or organization. This is because if the same type is used, it is easy to combine the hoses and the like, which is preferable.

As described above, the damping device 340 is provided in the carrier unit 30 in the present embodiment. The damping device 340 connects the front plate portion 304 and the rear plate portion 316, and the mounting angle thereof can be changed. It is mounted so that it can be tilted. Therefore, in the normal state, it is in a state of maintaining a substantially horizontal direction as shown in FIG. 9A, but when the pair of rear leg portions 315, 315 is driven to be shortened, as shown in FIG. 9B. In addition, the state in which the maximum stroke length is maintained is inclined downward toward the front side (left side in FIG. 9).

Further, as the damping device 340 tilts downward, the connected front plate portion 304 is pulled rearward (right side in FIG. 9), and the pair of front leg portions 303, 303 is pivoted around the shaft portions 306, 306. Tilt toward (right side in FIG. 9). Then, as the front plate portion 304 tilts, 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. This makes it possible to adjust the water discharge direction while maintaining the hovering state of the fire drone 1. When the discharge port 363 is directed upward, contrary to the above, the pair of rear leg portions 315 and 315 may be extended and driven from the state where the substantially horizontal direction shown in FIG. 9A is maintained. Further, since the direction of the discharge port 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 example of utilizing the drone for fire fighting 1 equipped with the lift generation unit 20 and the carrier unit 30 in the present embodiment will be described with reference to FIG. 10.

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 to fill the water feed hose 382 and the intermediate hose 381 with water. Note that it is preferable to fill water before the flight as compared to filling water during the flight because the influence on the flight operation of the fire drone 1 is less.

Then, the fire drone 1 is taken off to fly to a position higher than the target house 40. After flying to the desired position, the hovering state is set on the spot, the water discharge stopped state is switched to the water discharge state, and the pressurized water sent from the water pump vehicle 60 is discharged toward the target. At this time, it is considered that the water discharge reaction force acts on the fire fighting drone 1 via the front plate portion 304 as a reaction caused by the start of water discharge, and this reaction is absorbed or damped by the damping device 340. As described above, the damping device 340 reduces the influence on the drone 1 for fire fighting and reduces the influence on the flight due to the start and stop of water discharge, the switching of the water discharge type, and the like.

In addition, when the water discharge position cannot be adjusted by changing the altitude of the fire drone 1 such as when the flight altitude is restricted by an obstacle (not shown) or the like, the pair of rear legs 315 and 315 are used. The direction of water discharge may be adjusted by controlling expansion and contraction. In addition, fire extinguishing activities may be performed by appropriately switching the water discharge mode according to the situation, such as a rod-shaped water discharge when intensive water discharge is desired, and a wide-angle water discharge when wide-area water discharge is desired.

It is also possible to rush the fire drone 1 into the house 40 through the window 401 and perform fire fighting activities from inside. In such a case, a camera (not shown) or the like may be mounted on the fire 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. In addition, a microphone, a speaker, or the like (not shown) may be mounted on the fire drone 1 so that voice communication can be performed between a predetermined operator and a disaster victim. In this case, it is desirable to control the drone 1 for fire fighting according to the operation of a predetermined operator. With such a configuration, it is possible to carry out fire fighting activities via the display device or the like, and it is possible to carry out fire fighting activities safely and accurately without a firefighter or the like entering the inside.

As described above, the firefighting drone 1 in this embodiment includes the carrier unit 30, and the water discharge nozzle 360 and the water supply hose 382 can be connected to the intermediate hose 381 provided in the carrier unit 30. As a result, it becomes possible to fly with the water discharge nozzle 360, the intermediate hose, and the water supply hose 382 connected to the fire drone 1, and it is possible to move to the target site in a straight line distance without being greatly affected by obstacles on the ground. It is possible.

Moreover, since the direction of the water discharge nozzle is variable according to the expansion and contraction operation of the rear legs 315 and 315 that form the carrier unit 30, the water discharge position can be adjusted while maintaining the altitude of the fire drone 1. Further, the carrier unit 30 is provided with the damping device 340, which can absorb or mitigate the water discharge reaction force at the time of water discharge operation, and can reduce the influence on the fire drone 1.

Further, since the carrier unit 30 is detachably attached to the main body unit 10 by the attachment portion 31, it is possible to remove the carrier unit 30 and assemble it to another drone when the drone 1 for fire fighting fails. Become. Further, the carrier unit 30 can be detached and carried, and the convenience of carrying the fire drone 1 is improved. In addition, if the attachment portion 31 can be attached to the main body unit 10 in a one-touch type, the convenience is further improved.

Although the embodiments to which the present invention is applied have been described above, it goes without saying that appropriate modifications can be made without departing from the spirit of the present invention.

For example, in the above-described embodiment, an example in which the first intake port 242 is provided in the second air flow passage 263 is given, but the position at which the first intake port 242 is provided is not limited to this. For example, as shown in FIG. 11, the first intake port 242 may be provided on the bottom surface side of the blower case 201. Even with such a configuration, negative pressure is generated on the bottom surface side of the blower case 201, so that the air flowing out from the blower opening 262 is entrained, and as a result, the air flow flowing out from the blower opening 262 can be further accelerated. That is, it may be a position where a negative pressure can be generated on the downstream side of the blow port 262.
Further, in addition to the first intake port 242 provided at the above position, another intake port may be provided on the side surface of the blower case 201 opposite to the second cylindrical body 260. In the case of such a configuration, while the negative pressure is generated on the downstream side of the blower port 262 by taking in the air from the first intake port 242, the second blower flow passage 263 is taken in by taking in the air from the other intake port. The amount of air taken in can be increased.

Moreover, in the said embodiment, the example which fire-fighting is performed only with the drone 1 for fire fighting was given. However, when it is desired to secure a larger amount of water discharge or to use a longer hose at the actual site, it is assumed that the fire drone 1 alone is not sufficient. In such a case, as shown in FIG. 12, a fire fighting activity may be performed by linking a plurality of drones using another drone 2 for relay in addition to the drone 1 for fire fighting.

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

Further, in the above-described embodiment, the example in which each of the lift generation units 20 has the rotation mechanism section 202 is described, but the present invention is not limited thereto. For example, a rotation mechanism section 202 may be provided in the main body unit and a mechanism for blowing air to each lift generation unit 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 blades 80.

1 Fire Drone 10 Main Unit 20 Lifting Unit 30 Carrier Unit 200 Blower 220 Support 240 First Cylinder 260 Second Cylinder 301 Front Frame 302 Rear Frame 303 Front Leg 304 Front Plate 315 Rear Leg 316 Rear Plate 340 Damper 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

In order to achieve the above object, an amplification fluid flow generation mechanism according to the present invention is a rotary vane mechanism that generates a fluid flow in a predetermined direction, and a cylindrical body connected to the rotary vane mechanism. A first opening provided at one end of the upstream side, which guides the fluid flow generated by the blade mechanism so as to flow from one end on the upstream side toward the other end on the downstream side along the inner peripheral surface. A first cylindrical body having a first Coanda mechanism for amplifying the fluid flow by a Coanda effect by winding the fluid from the first cylindrical body; and a cylindrical body connected to the other end of the first cylindrical body, A fluid flow amplified by the first Coanda mechanism of the cylindrical body is guided so as to flow from one end portion on the upstream side toward the other end portion on the downstream side along the inner peripheral surface, and is provided at the one end portion on the upstream side. And a second cylindrical body having a second Coanda mechanism for further amplifying the amplified fluid flow by the Coanda effect by winding the fluid through the second opening.
Further, the rotary vane mechanism is configured such that the fluid flow in the predetermined direction is generated in a direction intersecting with a fluid flow in a first direction from one end portion to the other end portion of the first cylinder body. Is connected to the outer peripheral surface of the first cylindrical body, the first cylindrical body converts the fluid flow in the predetermined direction generated by the rotary vane mechanism into a fluid flow in the first direction to convert the inner peripheral surface. You may make it guide along.

Claims (1)

A rotary vane mechanism for generating a fluid flow in a predetermined direction,
A cylindrical body connected to the rotary blade mechanism, which guides a fluid flow generated by the rotary blade mechanism so as to flow from one end portion on the upstream side to the other end portion on the downstream side along the inner peripheral surface. And a first cylindrical body having a first Coanda mechanism that amplifies the fluid flow by winding the fluid from the first opening provided at the one end on the upstream side,
A cylindrical body connected to the other end of the first cylindrical body, the fluid flow being amplified by the first Coanda mechanism of the first cylindrical body from one upstream end along an inner peripheral surface. A second Coanda mechanism for guiding the flow toward the other end on the downstream side, and further amplifying the amplified fluid flow by entraining the fluid from the second opening provided at the one end on the upstream side. And a second cylindrical body having the amplified fluid flow generating mechanism.

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