Safety device and flying vehicle equipped with safety device

Abstract

To provide a safety device which can quickly expand a float, has sufficient buoyancy in landing, and is made to light weight as compared with conventional safety devices, and a flight body provided with the safety device.SOLUTION: A safety device 100 includes a parachute 10, a storage container which stores the parachute 10 and has a bottomed cylindrical shape, and an injection device which is provided in the storage container and injects the parachute 10 to the outside of the storage container. The parachute 10 includes a canopy 40, a plurality of lines 50, a center cord 60, and a bag-like member 70. In the outside of a top part of the canopy 40, the bag-like member 70 having a suction port 71 connected to a vent hole 42 is provided. In the suction port 71 of the bag-like member 70, a check valve 80 having a hinge part 81 and a plate member 82 is provided.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a safety device and an aircraft equipped with a safety device. [Background technology]

[0002] In recent years, advances in autonomous control technology and flight control technology have accelerated the industrial use of drones, which are aircraft equipped with multiple rotors. Such aircraft are expected to expand globally in the future.

[0003] On the other hand, the risk of aircraft crashes as described above is considered dangerous, hindering the widespread use of such aircraft. For example, one of the fields in which aircraft are used is cargo transportation. If an abnormality occurs during flight over the sea and the aircraft or cargo falls, it may be difficult to recover the aircraft or cargo. Therefore, in order to reduce the risk of such accidents, parachute deployment devices are being commercialized as safety devices. For example, Patent Document 1 discloses a parachute deployment device that includes a parachute for slowing the descent speed of cargo when it falls from an aircraft flying over the sea, and floats that function as flotation members after landing on water until the cargo is recovered. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] U.S. Patent No. 4,379,534 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0005] However, the parachute deployment device of Patent Document 1 uses a gas cylinder filled with high-pressure gas to deploy the parachute and floats, which increases the weight of the device. Furthermore, while emergency parachutes with floats have been installed on small manned aircraft, these parachutes are designed for drops from relatively high altitudes, such as 600 meters, and are not considered to be designed for drops from relatively low altitudes of 150 meters or less, such as those used by drones. In other words, if the manned aircraft were to drop while flying at a relatively low altitude of 150 meters or less, the floats would expand too slowly to provide sufficient buoyancy.

[0006] The present invention has been made in consideration of these circumstances, and aims to provide a safety device that can quickly inflate floats and exert sufficient buoyancy when landing on water, even when the aircraft falls during flight at a relatively low altitude, and that is lighter than conventional devices, as well as an aircraft equipped with this safety device. [Means for solving the problem]

[0007] (1) A safety device of the present invention includes a deployable body that can be deployed by being ejected into the air and that has a vent hole that opens when deployed; a container that houses the deployable body; an ejection device that is provided in the container and ejects the deployable body outside the container; and a safety device that is provided outside the vent hole and and bonded to at least a portion of the location of the vent;the deployment device is configured to launch the deployment object and the bag-shaped member, and to apply tension to the center cord, thereby making it easier to open the intake port. Here, the payload refers to, for example, an "air vehicle," "baggage," or "measuring device for measuring an environment such as air or sea."

[0008] (2) In the safety device of (1) above, the bag-shaped member preferably has a check valve provided at the vent or the intake.

[0009] (3) In the safety device of (1) or (2) above, the bag-shaped member is preferably made up of at least three waterproof panel members each having a polygonal or ship's bottom shape.

[0010] (4) In the safety devices of (1) to (3) above, it is preferable that the payload is an aircraft, and further includes an abnormality detection device capable of detecting an abnormality in the aircraft or the surrounding environment, and that the abnormality detection device activates the launch device when it detects the abnormality.

[0011] (5) In the safety device of (4) above, it is preferable to further include a flight control unit that stops a propulsion device provided on the aircraft when the abnormality detection device detects the abnormality.

[0012] (6) In the safety device of (4) or (5) above, it is preferable that the device further comprises an alarm unit that, when the abnormality is detected by the abnormality detection device, notifies the surroundings of the abnormality.

[0013] (7) In the safety device according to any one of (4) to (6) above, it is preferable that the device further comprises a storage unit for storing determination data when the abnormality is detected by the abnormality detection device.

[0014] (8) The aircraft of the present invention comprises an airframe, a safety device described in (1) to (7) above that is provided on the airframe, and one or more propulsion mechanisms that are coupled to the airframe and propel the airframe. [Effects of the Invention]

[0015] According to the present invention, it is possible to provide a safety device that can quickly inflate a bag-shaped member during descent, has sufficient buoyancy when landing on water, and is lighter than conventional devices, as well as an aircraft equipped with this safety device. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a schematic cross-sectional view of a safety device according to an embodiment of the present invention. [Figure 2] 2 is a front view showing the aircraft equipped with the safety device of FIG. 1, showing the state after the safety device has been activated. FIG. [Figure 3] 3 is a schematic cross-sectional view showing the safety device of FIG. 2, illustrating the state of the check valve before landing on water. FIG. [Figure 4] 3A to 3C are diagrams showing an example of a manufacturing process for a waterproof panel member that constitutes the bag-shaped member in the safety device of FIG. 2. [Figure 5] FIG. 2 is a block diagram showing the functional configuration of the safety device of FIG. 1. [Figure 6] 4 is a schematic cross-sectional view showing a first modified example of a check valve in the safety device of FIG. 3. FIG. [Figure 7] FIG. 7 is a partially enlarged schematic cross-sectional view showing the state of the check valve in the safety device of FIG. 6 after landing on water. [Figure 8] 4 is a schematic cross-sectional view showing a second modified example of the check valve in the safety device of FIG. 3. FIG. [Figure 9] 9 is a partially enlarged schematic cross-sectional view showing the state of the check valve in the safety device of FIG. 8 after landing on water. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, a safety device according to an embodiment of the present invention will be described with reference to the drawings. In the following embodiments and modifications thereof, a case will be described in which a parachute is used as an example of a deployable object in the safety device. Parachutes that can be used in this embodiment include, for example, "FLAT CIRCULAR", "CONICAL", "BICONICAL", "TRICONICAL", "EXTENDED SKIRT", "HEMISPHERICAL", "GUIDE SURFACE", "ANNULAR", "CROSS", "FLAT RIBBON", "CONICAL RIBBON", "RIBBON", "RINGSLOT", "RING SAIL", "DISC-GAP-BAND", "ROTAFOIL", "VORTEX RING", and "SANDIA RFD". Examples include "RFD", "PARACOMMANDER", "PARAWING", "PARAFOIL", "SAILWING", "VOLPLANE", and "BALLUTE".

[0018] As shown in FIG. 1 , a safety device 100 according to this embodiment includes a parachute 10, a cylindrical container 11 with a bottom that houses the parachute 10, and a launcher 20 that is provided within the container 11 and launches the parachute 10 out of the container 11. The launcher 20 includes a gas generator 21 having a cup-shaped case that houses an ignition charge (not shown), and a piston 24 having a recess 22 and a piston head 23 formed integrally with the recess 22. The parachute 10 (canopy 40 and bag-shaped member 70, described below) is placed in a folded state on the piston head 23. Before activation, the safety device 100 is connected to the inside of the container 11 via a line 50 and a center cord 60, described below. The line 50 and the center cord 60 are folded and stored within the container 11 so as not to interfere with the movement of the piston 24 during activation. The open end of the container 11 is initially closed by a lid 12, which is detached from the open end when the parachute 10 is pushed out.

[0019] In this configuration, when an abnormality is detected by the abnormality detection device 200 (described later), the piston 24 is propelled by gas pressure generated by the ignition of the gas generator 21. This allows the parachute 10 to be directly pushed out and deployed by the propulsive force of the piston 24. Therefore, as shown in Figure 2, after deployment, the parachute 10 can suspend the flying vehicle 30 via the line 50 and center cord 60.

[0020] 2 illustrates a safety device 100 and an aircraft 30 to which the safety device 100 is applied. The aircraft 30 includes a body 31, the safety device 100 provided on the upper part of the aircraft 31, one or more propulsion mechanisms (e.g., propellers) 32 coupled to the aircraft 31 and propelling the aircraft 31, and a plurality of legs 33 provided on the lower part of the aircraft 31. The aircraft 30 according to this embodiment is not limited to unmanned or manned aircraft such as drones, but also includes aircraft such as passenger planes and helicopters.

[0021] As shown in FIGS. 2 and 3, the parachute 10 includes an umbrella body 40, a plurality of lines 50, a center cord 60, and a bag-shaped member 70.

[0022] The umbrella body 40 is a roughly hemispherical body made up of multiple connected gores, and has an umbrella edge 41 that forms an opening, and a ventilation hole 42 formed at the top. Multiple lines 50 are connected to the umbrella edge 41. The lines 50 are cord-like connecting members with one end connected to the umbrella edge 41 and the other end connected to the inside of the container 11, and they support the flying vehicle 30 during descent.

[0023] Examples of Gore fabric include cloth-like materials made from fiber materials and film-like materials made from resin films. From the perspective of the lightweight nature of umbrella body 40, it is preferable to use film-like materials, which are lighter than cloth-like materials, as the Gore fabric, and examples of resin films that can be used include nylon, polyester, polyolefin, polyamide, polyimide, polyurethane, polyurea, etc.

[0024] 3, a bag-shaped member 70 having an air intake 71 connected to the vent 42 is provided on the outside of the top of the umbrella body 40, and a center cord 60 is provided around the periphery of the vent 42 or the air intake 71. The center cord 60 is a cord-like connecting member having one end that branches into multiple parts and is connected to the periphery of the vent 42 or the air intake 71, and the other end that is connected to the inside of the container 11, and it supports the flying vehicle 30 during descent.

[0025] The bag-shaped member 70 is formed by joining at least three or more polygonal (triangle, trapezoid, etc.) or ship-bottom-shaped waterproof panel members together by adhesive, welding, sewing, or the like. When the safety device 100 is activated, air flows into the bag-shaped member 70 through the air intake 71, causing the bag-shaped member 70 to expand into a substantially spherical shape. An example of a process for manufacturing a ship-bottom-shaped waterproof panel member will now be described with reference to FIG. 4. First, five waterproof panel members 70A are formed as shown in FIG. 4(a), which is a development of a sphere approximation obtained using a boat-shaped polyconic projection. Next, a portion of the bottom of each of the five waterproof panel members 70A is cut away to form five ship-bottom-shaped waterproof panel members 70B shown in FIG. 4(b). Although five waterproof panel members 70B, as shown in FIG. 4(b), may be simply joined together at adjacent curved portions to form a generally spherical bag-shaped member 70, to further enhance the strength, circular or other reinforcing waterproof panel members (e.g., "hole-patterning panels") may be attached by adhesive, welding, sewing, or other means to cover the vertices of the bag-shaped member 70 after joining the panels together to form a generally spherical shape. While several specific examples of the bag-shaped member 70 have been presented, any type of bag-shaped member 70 may be used as long as it forms a bag-like shape when air flows into the bag-shaped member 70 through the air intake vents 71 during operation. Examples of the fabric for the waterproof panel member include fabrics made of fiber materials and film-like materials made of resin and rubber films. To achieve a lightweight bag-shaped member 70, it is preferable to use a film-like material, which is lighter than a fabric-like material. Examples of resin films include nylon, polyester, polyolefin, polyamide, polyimide, polyurethane, and polyurea. Furthermore, examples of preferred rubber films include urethane rubber (U), tetrafluoroethylene propylene rubber (FEPM), vinyl methyl silicone rubber (VMQ), ethylene propylene diene rubber (EPDM), nitrile rubber (NBR), hydrogenated nitrile rubber (HNBR), acrylic rubber (ACM), natural rubber (NR), and styrene butadiene rubber (SBR).The bag-shaped member 70 can be attached to the umbrella body 40 by adhesive, welding, or sewing.

[0026] As shown in FIG. 3, the air intake 71 of the bag-shaped member 70 is provided with a check valve 80 including a hinge portion 81 and a plate member 82. The plate member 82 is rotatably mounted on the inner peripheral edge of the air intake 71 via the hinge portion 81, as indicated by the arrow in FIG. 3. The plate member 82 is configured to freely open toward the inside of the bag-shaped member 70 via the hinge portion 81, but the rotation angle of the plate member 82 is limited so that it does not open toward the outside (i.e., it does not rotate into the inside of the umbrella body 40). Therefore, when the safety device 100 is activated, a large amount of air is taken into the bag-shaped member 70 through the air intake 71. However, when the umbrella 40 lands on water, the flow of air into the inside of the umbrella body 40 is stopped, and the weight of the plate member 82 closes the air intake 71, preventing the air inside the bag-shaped member 70 from easily escaping to the outside. In other words, the bag-shaped member 70 functions as a float, or a floating device. The plate member 82 may be made of, for example, cloth, resin, rubber, or metal.

[0027] The safety device 100 also includes an abnormality detection device 200 (not shown in FIG. 2) that includes an acceleration sensor and the like that detects abnormalities in the flying object 30.

[0028] Here, we will explain the functional configuration of the abnormality detection device 200. As shown in Fig. 5, the abnormality detection device 200 includes a sensor (detection unit) 210 and a control unit (a computer having a CPU, ROM, RAM, etc.) 220, and is electrically connected to an igniter in the gas generator 21 of the injection device 20, a memory unit 201, a flight control unit 202, and an alarm unit 203.

[0029] The sensor 210 detects the flight status (including collisions, crashes, etc.) of the flying object 30. Specifically, the sensor 210 is a sensor selected from one or more of an acceleration sensor, a gyro sensor, a barometric pressure sensor, a laser sensor, an infrared sensor, a monocular / compound eye vision sensor, an ultrasonic sensor, etc., and can acquire data on the flight status of the flying object 30, such as the speed, acceleration, inclination, altitude, and position of the flying object 30, and obstacles that may hinder the flight of the flying object 30, as well as data on the surrounding environment (obstacles, topography, shape of buildings, etc.).

[0030] The control unit 220 has, as its functional configuration, an abnormality detection unit 221, a calculation unit 222, and a notification unit 223. The abnormality detection unit 221, the calculation unit 222, and the notification unit 223 are functionally realized by the control unit 220 executing a predetermined program.

[0031] The anomaly detection unit 221 not only detects abnormal conditions related to the surrounding environment based on information received from the sensor 210, but also detects the flight status of the aircraft 30 (whether an abnormal condition such as a fall has occurred during flight). In other words, the anomaly detection unit 221 detects whether the sensor 210 and the aircraft 30 are operating normally. For example, the anomaly detection unit 221 can detect an emergency situation for personnel inside the aircraft 30, a fatal malfunction of equipment inside the aircraft 30, the aircraft 30's power supply being below a predetermined value, the aircraft 30's fuel amount being below a predetermined value, the aircraft 30's acceleration or angular velocity being above or below a predetermined value, the aircraft 30's attitude angle being above a predetermined value, and the aircraft 30's descent speed being above a predetermined value. Furthermore, when the aircraft 30 is being operated by an operator using a controller, the anomaly detection unit 221 can detect the loss of an operation signal from the controller or the reception of an abnormal signal. Furthermore, the anomaly detection unit 221 can detect the loss of a signal from the controller or the reception of an abnormal signal from a ground station.

[0032] The calculation unit 222 determines whether the flight status of the flying object 30 is abnormal based on each piece of data actually measured and acquired by the sensor 210. Specifically, the calculation unit 222 determines whether there is an abnormality by comparing each piece of data acquired by the sensor 210 with each preset threshold value. The calculation unit 222 also receives obstacle detection signals, distance detection signals, altitude detection signals, etc. from the sensor 210 in real time, and determines whether there is an abnormality based on each of these received signals. The calculation unit 222 also determines whether the flying object 30 is approaching or entering a prohibited area, or deviating from the planned route, based on the position information of the flying object 30.

[0033] Furthermore, when the calculation unit 222 determines that the flight state of the flying object 30 is abnormal, it outputs an abnormality signal (which may include a command signal to start or operate other equipment) to the outside. Note that an abnormality signal output unit may be provided separately from the calculation unit 222, and configured so that this abnormality signal output unit outputs an abnormality signal in response to a command from the calculation unit 222.

[0034] When the abnormality detection unit 221 detects an abnormality in the sensor 210 and the flying object 30, the notification unit 223 notifies a manager or the like that an abnormality has been detected.

[0035] The storage unit 201 can store various data such as data acquired by the sensor 210 and determination data when an abnormality is determined by the calculation unit 222.

[0036] The flight control unit 202 controls the flight attitude of the aircraft 30, and is capable of stopping the propulsion device (motor, etc.) provided in the aircraft 30 if an abnormality is determined by the calculation unit 222.

[0037] The notification unit 203 is capable of notifying the surroundings of an abnormality when an abnormality is determined by the calculation unit 222. For example, the notification unit 203 activates a sound generating device (such as an alarm) and / or a lighting device (such as an LED) to notify the surroundings of the abnormality.

[0038] Next, the operation of the safety device 100 will be described.

[0039] First, if the flying vehicle 30 encounters an abnormal situation during flight, and the abnormality detection unit 221 detects an abnormal state, detects the loss of an operation signal from the controller, or the operator operates the controller to send an abnormality signal to the safety device 100, the abnormality detection unit 221 sends the abnormality signal to the calculation unit 222. Upon receiving the abnormality signal, the calculation unit 222 sends an operation signal to the gas generator 21 of the ejection device 20. The gas generator 21, upon receiving this operation signal, activates the igniter and propels the piston 24 by the generated gas pressure. This propulsive force ejects the canopy 40 and the bag-shaped member 70 of the parachute 10 outside the container 11. Then, the multiple lines 50 connected to the ejected canopy 40 and the center cord 60 connected to the bag-shaped member 70 extend, and the canopy 40 begins to unfold, and air begins to flow into the canopy 40. Thereafter, once the center cord 60 and the center cord 60 are fully stretched and taut, i.e., once tension is applied to the line 50 and the center cord 60, the umbrella body 40 opens completely. At this time, the edges of the vent 42 and the air intake 71 are pulled downward in FIG. 3 by the center cord 60 and pulled radially outward from the center by the line 50, enabling the check valve 80 provided in the air intake 71 to open and close. Further air flows into the interior of the umbrella body 40, pushing the plate member 82 inward of the bag-shaped member 70, opening the air intake 71 and allowing air to naturally flow into the interior of the bag-shaped member 70, causing the bag-shaped member 70 to expand and unfold into a generally spherical shape.

[0040] Therefore, according to the safety device 100, the bag-shaped member 70 can be quickly inflated while the parachute 10 is descending, slowing down the descent speed of the flying vehicle 30 and reducing the impact on the flying vehicle 30 when it lands on water. Furthermore, when it lands on water, the inflow of air into the interior of the umbrella body 40 stops and the air intake 71 is closed by the weight of the check valve 80 (particularly the plate member 82), so the air inside the bag-shaped member 70 remains inside the bag-shaped member 70 and water is prevented from entering the bag-shaped member 70. As a result, sufficient buoyancy is exerted when it lands on water, allowing the flying vehicle 30 to be easily recovered.

[0041] Furthermore, according to the safety device 100, even if the flying object 30 falls during flight at a relatively low altitude of 150 m or less, the bag-shaped member 70 can be quickly inflated to provide sufficient buoyancy when it lands on water.

[0042] In safety device 100, if the inside of bag-shaped member 70 is sufficiently filled with air before landing on water, it is not necessary to provide check valve 80 at air intake port 71 of bag-shaped member 70. For example, when landing on water with relatively calm waves, air remains inside bag-shaped member 70, and water hardly enters, ensuring sufficient buoyancy. Therefore, even if check valve 80 is not provided at air intake port 71, there is no problem because bag-shaped member 70 will function as a float. The same applies to the following modified examples.

[0043] The above describes embodiments of the present invention, but these are merely illustrative examples and do not limit the present invention, and specific configurations and the like can be modified as appropriate. Furthermore, the actions and effects described in the embodiments of the invention are merely a list of the most preferred actions and effects resulting from the present invention, and the actions and effects of the present invention are not limited to those described in the embodiments of the present invention. For example, the following modifications are also possible. In the following modifications, reference numerals with the same last two digits are similar, and therefore their explanation may be omitted. Furthermore, parts not specifically described are similar to the safety devices and aircraft of the above embodiments, and therefore their explanation may be omitted.

[0044] (First Modification) A first modification of the check valve 80 in the safety device 100 of the above embodiment will be described with reference to FIGS.

[0045] As shown in FIG. 6 , in the safety device 300 according to the first modification, a check valve 380 is provided at the vent 342 of the umbrella body 340 or the intake 371 of the bag-shaped member 370. The check valve 380 includes a net member 383 and a truncated cone portion 384 that assumes a truncated cone shape when air flows in through the intake 371. The net member 383 is formed in a breathable mesh shape and is provided to cover the intake 371. The truncated cone portion 384 has openings at both the top and bottom, and the lower open end is attached to the edge of the vent 342 or the intake 371, allowing air flowing in through the vent 342 or the intake 371 to pass through the interior. Examples of the fabric for the truncated cone portion 384 include a cloth-like material made of a fiber material and a film-like material made of a resin film.

[0046] In the bag-shaped member 370 equipped with the check valve 380, when the safety device 300 is activated, air that flows into the canopy 340 first flows through the vent 342, the intake 371, and the net member 383 into the truncated cone portion 384, forming a truncated cone shape. The air then passes through the truncated cone portion 384 and is drawn into the bag-shaped member 370. That is, as shown in FIG. 6 , the bag-shaped member 370 is inflated. When the canopy 340 lands on water, the flow of air into the canopy 340 stops, and as shown in FIG. 7 , the truncated cone portion 384 collapses under its own weight, causing the truncated cone shape to collapse, thereby closing the vent 342 and the intake 371. This prevents the air inside the inflated bag-shaped member 370 from easily escaping to the outside. Therefore, in the safety device 300, the bag-shaped member 370 functions as a float, achieving the same effects as those of the above-described embodiment.

[0047] (Second Modification) A second modification of the check valve 80 in the safety device 100 of the above embodiment will be described with reference to FIGS.

[0048] As shown in Fig. 8, in a safety device 400 according to the first modification, a check valve 480 is provided in the vent 442 of the umbrella body 440 or the air inlet 471 of the bag-shaped member 470. This check valve 480 includes a net member 483, an inverted truncated cone portion 485 that assumes an inverted truncated cone shape when air flows in from the air inlet 471, and a hollow, relatively light, plastic ball 486. The net member 483 is formed in a breathable mesh shape and is provided so as to cover the upper opening of the inverted truncated cone portion 485. The inverted truncated cone portion 485 has openings at the top and bottom, and the lower open end is attached to the edge of the vent 442 or the air inlet 471 so that the air flowing in from the air inlet 471 passes through the interior. Furthermore, inside inverted truncated cone portion 485, ball 486 is provided so as to be movable between net member 483 and vent hole 442 and air intake hole 471. The diameter of ball 486 is set to be larger than the diameters of vent hole 442 and air intake hole 471. Furthermore, examples of the fabric for inverted truncated cone portion 485 include a cloth-like body made of a fiber material and a film-like body made of a resin film.

[0049] In the bag-shaped member 470 equipped with such a check valve 480, when the safety device 400 is activated, first, the ball 486, which is blown by the air flowing into the interior of the umbrella body 440, moves toward the net member 483. Next, air flows into the inverted truncated cone portion 485 from the vent port 442 and the air intake port 471, forms an inverted truncated cone shape, passes through, and is taken into the interior of the bag-shaped member 470. That is, as shown in FIG. 8, the bag-shaped member 470 is inflated. Then, when the umbrella body 440 hits water, the inflow of air into the interior of the umbrella body 440 stops, and as shown in FIG. 9, the inverted truncated cone portion 485 and the net member 483 collapse and lose their truncated cone shapes due to their own weight, and the ball 486 closes the vent port 442 and the air intake port 471. This makes it possible to prevent the air inside the inflated bag-shaped member 470 from easily escaping to the outside. Therefore, in the safety device 400, the bag-shaped member 470 functions as a float, and the same effects as those of the above embodiment can be achieved.

[0050] In the above-described embodiment and modified examples, the flying vehicle may be equipped with an airbag device for inflating an airbag. For example, the airbag device may be installed at the bottom of the aircraft when in a normal attitude, facing the main body of the safety device installed at the top of the aircraft when in a normal attitude. In this case, the impact on the flying vehicle when landing on water can be further reduced.

[0051] Furthermore, in the above-described embodiment and modified examples, a gas generator is used as the driving source for the ejection device. However, this is not limited to this. For example, an elastic body type using an elastic body such as a spring, a gas cylinder type using gas pressure trapped in a container, or a chemical reaction type (non-explosive) in which two or more substances are mixed and a chemical reaction occurs to generate gas pressure may be used as the driving source. Furthermore, a retractable ejection device may be used instead of the ejection device of the above-described embodiment and modified examples. Examples of such a retractable ejection device include a system in which an actuator launches a weight and then the deployable object is retracted, a system in which a rocket is launched and then the deployable object is retracted, and a system in which a pilot chute is first launched and then the deployable object is retracted by the pilot chute.

[0052] Furthermore, in the above embodiment and modified example, the other ends of the line and center cord are described as being connected to the inside of the container, but this is not limited to this, and they may be connected, for example, to the outside of the container or to the body of the aircraft.

[0053] In addition, although the above embodiment and modified examples show examples in which a safety device is attached to an aircraft, the present invention is not limited to this. For example, when dropping cargo from an aircraft onto water, the safety device according to the present invention can be attached to the cargo before it is dropped.

[0054] In the above embodiment and modified examples, the vent in the umbrella body and the air inlet in the bag-shaped member are configured to be formed in the same part, but they do not necessarily have to be in the same part. For example, the air inlet may be attached to cover the outer periphery of the vent in a sealed manner, and a check valve may be attached to either the vent or the air inlet. [Explanation of symbols]

[0055] 10, 310, 410 Parachutes 11 Container 12 Lid 20 Injection device 21 Gas Generator 22 recess 23 Piston head 24 pistons 30 Flying Objects 31 aircraft 32 Propulsion mechanism 33 Legs 40, 340, 440 umbrella body 41, 341, 441 Umbrella edge 50, 350, 450 lines 60, 360, 460 center code 70, 370, 470 Bag-shaped member 70A, 70B Waterproof panel members 71, 371, 471 intakes 80, 380, 480 check valve 81 Hinge part 82 Plate members 100, 300, 400 safety equipment 200 Anomaly Detection Device 201 Storage section 202 Flight Control Unit 203 Information Department 210 Sensors 220 Control Unit 221 Abnormality detection unit 222 Arithmetic section 223 Notification Department 383, 483 Net material 384 Cone truncated part 485 Inverted cone section 486 balls

Claims

1. a deployable body that can be deployed by being ejected into the air and that has a vent hole that opens when deployed; a container that contains the deployable object; an ejection device provided in the container and configured to eject the deployable object from the container; a bag-shaped member provided on the outer side of the ventilation hole, joined to at least a portion of the ventilation hole, and having an air intake port that draws air through the ventilation hole; a plurality of lines, one end of which is connected to an edge of the deployable object and the other end of which is connected to the container or a payload outside the container; a center cord having one end that branches into a plurality of parts and is connected to an edge of the vent or an edge of the intake port, and the other end that is connected to the container or the payload; Equipped with A safety device characterized in that the deployment body and the bag-shaped member are ejected by operating the ejection device, and tension is applied to the center cord, making it easier to open the air intake port.

2. 2. The safety device according to claim 1, wherein the bag-shaped member is provided with a check valve at the vent or the intake.

3. 3. A safety device according to claim 1, wherein the bag-shaped member is made up of at least three waterproof panel members each having a polygonal or ship's bottom shape.

4. the payload is an air vehicle, Further comprising an abnormality detection device capable of detecting abnormalities in the aircraft or the surrounding environment, 4. The safety device according to claim 1, wherein the abnormality detection device activates the injection device when the abnormality is detected.

5. 5. The safety device according to claim 4, further comprising a flight control unit that stops a propulsion device provided on the aircraft when the abnormality is detected by the abnormality detection device.

6. 6. The safety device according to claim 4, further comprising an alarm unit that notifies surrounding people of an abnormality when the abnormality is detected by the abnormality detection device.

7. 7. The safety device according to claim 4, further comprising a storage unit for storing determination data when the abnormality is detected by the abnormality detection device.

8. the payload is an air vehicle, The aircraft and The safety device according to any one of claims 1 to 7, which is provided on the aircraft body; and one or more propulsion mechanisms coupled to the airframe for propelling the airframe.

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